EP0263290B1 - Einrichtung für Feuerlöschfahrzeuge mit einem automatischen, elektronisch gesteuerten Zumischer - Google Patents

Einrichtung für Feuerlöschfahrzeuge mit einem automatischen, elektronisch gesteuerten Zumischer Download PDF

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Publication number
EP0263290B1
EP0263290B1 EP19870112382 EP87112382A EP0263290B1 EP 0263290 B1 EP0263290 B1 EP 0263290B1 EP 19870112382 EP19870112382 EP 19870112382 EP 87112382 A EP87112382 A EP 87112382A EP 0263290 B1 EP0263290 B1 EP 0263290B1
Authority
EP
European Patent Office
Prior art keywords
foaming agent
fire
fighting water
supplied
pump
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
EP19870112382
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0263290A2 (de
EP0263290A3 (en
Inventor
Hermann Dipl.-Ing. Göhringer
Reinhard Dipl.-Ing. Lansche
Hans J. Ing. Rusch
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.)
Total Walther Feuerschutz GmbH
Original Assignee
Total Walther Feuerschutz 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25848320&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0263290(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Total Walther Feuerschutz GmbH filed Critical Total Walther Feuerschutz GmbH
Priority to AT87112382T priority Critical patent/ATE79778T1/de
Publication of EP0263290A2 publication Critical patent/EP0263290A2/de
Publication of EP0263290A3 publication Critical patent/EP0263290A3/de
Application granted granted Critical
Publication of EP0263290B1 publication Critical patent/EP0263290B1/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
    • A62C27/00—Fire-fighting land vehicles
    • 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 invention relates to a device for fire-fighting vehicles with an automatic, electronically controlled admixer, with which a foam agent is sucked in from a storage container and the fire water is mixed behind the fire water pump in a predetermined amount, the dosage of the amount of foam agent provided by a in the foam agent line a control element actuated by a control unit in connection with several flow measuring devices in the extinguishing agent lines, the extinguishing water-foam medium mixture being fed via lines to a consumer, where a control valve is provided as the control element, and that the extinguishing water-foam medium mixture and the foam agent are passed through the flowmeters are recorded quantitatively and both measured values are fed to the control unit, the dosage of the foam agent taking into account the current flow rate of extinguishing water and foam agent mixture and the set dosage values s automatically by controlling the control valve, resulting from a target / actual comparison.
  • a volumetric metering pump which is speed-controlled by a control unit is provided.
  • a speed is assigned to a certain volume flow according to the pump characteristic and the admixing depends on the proportionality and reproducibility of the admixing characteristic, or the flow must be measured and the speed corrected in the event of deviations.
  • Such speed controls are relatively easy to implement in the case of an AC power supply via the frequency, a relatively large outlay having to be carried out on vehicles because of the DC power supply.
  • mixing devices which operate using a foam agent pump based on the differential pressure principle, or with speed-controlled volumetric metering pumps, or in which the signal of the water flow is converted mechanically to control the foam agent flow.
  • the known admixers have the disadvantage that e.g. the amount of motive water cannot be used to operate the bypass as an extinguishing agent, the pressure losses in the differential pressure principle are relatively high and, in the case of speed-controlled metering pumps, there is a dependency on the pump characteristic and its reproducibility.
  • the known systems also have the disadvantage that they work with satisfactory accuracy only in a relatively small flow range (1: 7 to 1:10).
  • the invention has for its object to provide an automatic admixing device for mobile systems with which the known Disadvantages are avoided and can be used with very high accuracy in a large flow range.
  • the foam agent is mixed in behind the fire water pump; that the extinguishing water-foam agent mixture is fed to several consumers via branch lines, that the quantitative detection of the extinguishing water-foam agent mixture takes place in two partial streams, the partial streams optionally being detected by means of a flow meter and / or by means of a pressure measurement, and both values are added via an adder Control unit are fed.
  • the water flow is continuously measured in the partial flows and the foam medium is fed to the water with the foam medium pump via the flow meter and the control valve.
  • the extinguishing water-foam agent mixture is measured and processed in each partial flow.
  • the measured values are sent as electrical signals to a computer which compares them with the signal from the foam agent flow meter, taking into account the set dosage, and eliminates differences by correspondingly controlling the control valve.
  • the flow measurement can be carried out without pressure loss in the thrower supply and a smaller flow measuring device, which then works more precisely in this area and is less expensive, can be used in the second partial flow.
  • Both partial flows can optionally be measured by means of a pressure meter or a flow meter or vice versa.
  • Another advantage of the invention is the fact that a speed control in favor of a much simpler control for changing the cross section in the control element is omitted can.
  • a very simple centrifugal or impeller pump can be used instead of the volumetric pump, which only has to bring the maximum flow rate and a minimum pressure level, but can otherwise run at a constant speed.
  • the invention does not show any loss in performance due to pump circulation. Larger pressure drops can also be processed. After that, the whole system according to the invention becomes less susceptible to faults. Pipes can be dimensioned smaller and a flow meter with a higher pressure loss can be used. If the foaming agent is seen in the direction of flow, introduced before the extinguishing water pump, the advantage is that the foaming agent pump can run with a weaker drive.
  • a signal is taken from the flow meter for the foam agent, which is processed to indicate the level of the foam agent and consequently can always be provided for sufficient foam agent.
  • the consumer denoted by 1 can represent a launcher tube and the consumer denoted by 2 can represent a connection for an extinguishing hose or the like or, as shown in the exemplary embodiment, for three extinguishing hoses 2a, 2b and 2c.
  • the extinguishing agent consists of a mixture of water and foam.
  • the water is taken from a hydrant 44. According to FIG. 1, the water is drawn in by means of a line 5 from a pump 6 and supplied to the consumer 1 and the consumer (s) 2 in the pressure mode.
  • the foaming agent 12 is fed into the line 5 behind the pump 6 at 15a, as shown in FIG. 1.
  • a branch line 7a leading to the consumer 1 there is a valve 8 for switching the consumer 1 on and off, and a changeover valve 10 for regulating the power of the consumption 1.
  • the foam agent 12 is located in a closed storage container 11 with a feed 35 and is supplied by one Pump 13 sucked in through a line 14, pressurized there and mixed in at 15 of the extinguishing water line 5 and passed on in the mixture line 7.
  • a shut-off valve 16 In the line 14 there is a shut-off valve 16, a control valve 17 and a flow meter 18, which can be designed, for example, as an impeller counter.
  • a branch line 20 branches off at 19, which is divided into lines 22 to consumers 2.
  • a pressure measuring device 9 for quantitative detection of the flow rate.
  • a flow meter 21 which can be designed, for example, as a Woltmann meter.
  • a control line 40 leads from the flow meter 21 and is introduced into a computer 36. With 23 shut-off valves for designated the consumer 2.
  • a branch line 25 leaves the line 20, which ends at 24 in the branch line 14.
  • line 25 is used to flush the foam medium line 14.
  • a branch line 30 is led from line 14 into the foaming agent container 11 at 29.
  • a shut-off valve 31 for the container return and an overflow valve 32 are provided in line 30.
  • a computer for example a microprocessor 36, is provided for the automatic admixing of the foaming agent, to which the corresponding control commands are supplied by a setpoint generator 37 via control lines 38.
  • Flow measuring devices 18 and 21 and from the pressure measuring device 9 go from control lines 39, 40 and 41, which are introduced into the computer 36.
  • the values supplied to the computer 36 by the devices 9, 18 and 21 are processed in the ACTUAL / TARGET comparison.
  • the actuator 43 of the control valve 17 is actuated by means of the control line 42.
  • a signal is taken from the flow meter 18 by means of a control line 34, which is fed to the fill level indicator 33, with which the amount of foam agent present is displayed.
  • a stream of extinguishing water is mixed in a selectable ratio of foaming agent, the percentage addition remaining constant regardless of the water flow and this constancy being achieved automatically.
  • the measurements can be carried out, as shown in FIGS. 2 to 4.
  • the pressure measurement 9 and the flow measurement 21 are arranged differently and can therefore be used optionally.

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)
  • Accessories For Mixers (AREA)
  • Alarm Systems (AREA)
  • Measuring Volume Flow (AREA)
EP19870112382 1986-10-09 1987-08-26 Einrichtung für Feuerlöschfahrzeuge mit einem automatischen, elektronisch gesteuerten Zumischer Expired - Lifetime EP0263290B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87112382T ATE79778T1 (de) 1986-10-09 1987-08-26 Einrichtung fuer feuerloeschfahrzeuge mit einem automatischen, elektronisch gesteuerten zumischer.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3634452 1986-10-09
DE3634452 1986-10-09
DE3726672 1987-08-11
DE19873726672 DE3726672A1 (de) 1986-10-09 1987-08-11 Einrichtung fuer feuerloeschfahrzeuge mit einem automatischen, elektronisch gesteuerten zumischer

Publications (3)

Publication Number Publication Date
EP0263290A2 EP0263290A2 (de) 1988-04-13
EP0263290A3 EP0263290A3 (en) 1989-08-02
EP0263290B1 true EP0263290B1 (de) 1992-08-26

Family

ID=25848320

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870112382 Expired - Lifetime EP0263290B1 (de) 1986-10-09 1987-08-26 Einrichtung für Feuerlöschfahrzeuge mit einem automatischen, elektronisch gesteuerten Zumischer

Country Status (7)

Country Link
EP (1) EP0263290B1 (US06268120-20010731-C00013.png)
DE (1) DE3726672A1 (US06268120-20010731-C00013.png)
DK (1) DK521187A (US06268120-20010731-C00013.png)
ES (1) ES2033753T3 (US06268120-20010731-C00013.png)
GR (1) GR3006355T3 (US06268120-20010731-C00013.png)
NO (1) NO172625C (US06268120-20010731-C00013.png)
PT (1) PT85884B (US06268120-20010731-C00013.png)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3817852C1 (US06268120-20010731-C00013.png) * 1988-05-26 1989-07-27 Total Walther Feuerschutz Gmbh, 5000 Koeln, De
US5823219A (en) * 1992-08-18 1998-10-20 National Foam, Inc. System and method for producing and maintaining predetermined proportionate mixtures of fluids
US5284174A (en) * 1992-08-18 1994-02-08 Chubb National Foam, Inc. System and method for producing and maintaining predetermined proportionate mixtures of fluids
WO1994026353A1 (en) * 1993-05-06 1994-11-24 Gary Trevor Love A foam proportioner
EP0633042A1 (de) * 1993-07-08 1995-01-11 VOGT AG, Feuerwehrgeräte- und Fahrzeugbau Schaumzumischung für Hochdruckpumpen
AT401693B (de) * 1993-10-08 1996-11-25 Rosenbauer Int Ag Zumischeinrichtung zum zumischen von zusatzmitteln zu einer flüssigkeit
AT941U1 (de) * 1993-10-19 1996-08-26 Rosenbauer Int Ag Einsatzfahrzeug, insbesondere flughafentanklöschfahrzeug
CA2231881C (en) * 1996-07-16 2002-12-31 Chemonics Industries, Inc. Proportioning valve and control means therefor
DE29705611U1 (de) 1997-03-29 1997-07-03 Müller, Erich, 89257 Illertissen Zumischeinrichtung für Feuerlöschanlagen
AT3857U1 (de) * 1999-10-25 2000-09-25 Lenzing Technik Gmbh & Co Kg Zumischeinrichtung für feuerlöschanlagen
EP1473061B1 (de) 2003-04-30 2009-07-08 Rassek, Bernd-Dietrich Verfahren zur Zumischung (Dosierung) von flüssigen Löschmittelzusätzen in Feuerlöschanlagen mit wässrigen Löschmitteln
DE102005057200B4 (de) * 2005-11-29 2007-12-06 Schlingmann Gmbh & Co. Kg Feuerwehrfahrzeug

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3115158A (en) * 1962-03-01 1963-12-24 Sterling Prec Corp Airfoam liquid proportioning system
US4005803A (en) * 1975-08-22 1977-02-01 Deere & Company Chemical concentrate injection system
DE2835468A1 (de) * 1978-08-12 1980-02-21 Total Foerstner & Co Schaummittelzumischvorrichtung
DE3038334A1 (de) * 1980-10-10 1982-10-21 Albert Ziegler Gmbh & Co Kg, 7928 Giengen Einrichtung fuer feuerloeschfahrzeuge zum zumischen eines schaum- oder filmbildenden zusatzmittels zum loeschwasserstroms

Also Published As

Publication number Publication date
NO172625B (no) 1993-05-10
PT85884A (pt) 1988-11-30
NO874185D0 (no) 1987-10-06
GR3006355T3 (US06268120-20010731-C00013.png) 1993-06-21
EP0263290A2 (de) 1988-04-13
NO874185L (no) 1988-04-11
DE3726672A1 (de) 1988-04-14
ES2033753T3 (es) 1993-04-01
NO172625C (no) 1993-08-25
PT85884B (pt) 1993-07-30
EP0263290A3 (en) 1989-08-02
DK521187D0 (da) 1987-10-05
DE3726672C2 (US06268120-20010731-C00013.png) 1992-11-05
DK521187A (da) 1988-04-10

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