EP0343320B1 - Einrichtung für Feuerlösch-Anlagen mit einem automatischen, elektronisch gesteuerten Zumischer - Google Patents

Einrichtung für Feuerlösch-Anlagen mit einem automatischen, elektronisch gesteuerten Zumischer Download PDF

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Publication number
EP0343320B1
EP0343320B1 EP89102495A EP89102495A EP0343320B1 EP 0343320 B1 EP0343320 B1 EP 0343320B1 EP 89102495 A EP89102495 A EP 89102495A EP 89102495 A EP89102495 A EP 89102495A EP 0343320 B1 EP0343320 B1 EP 0343320B1
Authority
EP
European Patent Office
Prior art keywords
accordance
control valve
foaming agent
fire
microprocessor
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
EP89102495A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0343320A3 (en
EP0343320A2 (de
Inventor
Reinhard Dipl.-Ing. Lansche
Ulrich Dobbertin
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
Total 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
Application filed by Total Walther Feuerschutz GmbH, Total Feuerschutz GmbH filed Critical Total Walther Feuerschutz GmbH
Priority to AT89102495T priority Critical patent/ATE97750T1/de
Publication of EP0343320A2 publication Critical patent/EP0343320A2/de
Publication of EP0343320A3 publication Critical patent/EP0343320A3/de
Application granted granted Critical
Publication of EP0343320B1 publication Critical patent/EP0343320B1/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
    • 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 with an automatic, electronically controlled admixer, in particular for fire extinguishing systems, with which a foam agent is sucked in from a storage container and admixed under pressure in a controlled amount with the extinguishing water, the foam agent being metered automatically by a control element provided in the foam agent line , which is operated in conjunction with flowmeters from basic electronics with a digitally controlled microprocessor, the extinguishing water / foam mixture being supplied to several consumers via branch lines, the extinguishing water / foam mixture and the foaming agent being measured quantitatively by the flowmeters and both measured values being measured with a setpoint-fed basic electronics are fed and the dosage of the foam agent taking into account the current flow rate of extinguishing water-foam agent mixture and the set default value Control of the control valve resulting from a target / actual comparison is carried out automatically.
  • Such a device (DE 37 26 672 A1) is used for mobile systems, such as fire-fighting vehicles, with high mixing accuracy and large flow measuring ranges. These advantages are bought when the water-foam mixture is divided into two. Electronically controlled admixers have already been used in mobile devices. In the case of the stationary systems, the pure admixing function was carried out by a normal pre-mixer, which works on the principle of the water jet pump. This proportioning device is built into the bypass of a water pump, between the pump outlet (pressure side) and pump inlet (suction side). In addition to these pump premixers, mixing devices are also known 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.
  • DE-OS 30 38 3344 Also in a fire truck, it is known from DE-OS 30 38 334) to provide a volumetric metering pump that is speed-controlled by a control unit.
  • the invention is based on the provision of creating an electronic admixing system which covers a wide admixing range, which responds quickly and whose electronics can be used in a variety of ways.
  • the system should be easy to use and can be adapted to other tasks with little effort (software change).
  • Another object of the invention is to simplify the line routing so that the admixing performance does not have to be split.
  • the basic electronics are provided with two programming fields in which the area of application and the desired default value can be selected, that a self-optimizing control algorithm is provided for the control valve, which prevents the control valve from overshooting, and that the microprocessor also is provided with a watchdog which, in the event of a fault, causes all important data to be stored in RAM.
  • the admixing system according to the invention is intended in particular for mounting on fire engines and for use in stationary fire extinguishing systems. It automatically mixes the set amount of foaming agent or another suitable additive into the water flow and keeps it constant as a percentage over the entire specified flow range.
  • the water flow and the foam agent flow are measured electrically and a target / actual value comparison is carried out taking into account the specified admixture and differences are compared by an electrical control unit until the actual value corresponds to the target value.
  • the foam agent is sucked by a pump 1 out of the tank 2 by means of a line 3 and fed to the water line 7 coming from a water tank 6 via a control valve 4 equipped with a control element monitoring and a flow meter 5.
  • a foam agent return line 8 to the foam agent tank 2 is provided via a shut-off element 9 and an overflow valve 10.
  • a bypass 12 is placed parallel to the measuring and controlled system via a shut-off element 11, in which a diaphragm 13 is located.
  • a flow meter 14 In the line 17 carrying the mixture there is a flow meter 14 with which the instantaneous consumption of the foam agent / water mixture is determined and supplied to the basic electronics 15.
  • the pressure line 17 branches behind the pump 25 in lines 18 and 19 to supply the various consumers 20 and 21 to 23.
  • 20 can be a foam jet pipe and the consumers 21 to 23 of any type.
  • a rinsing line 24 is connected to the pressurized water side of the pump 25 and is guided into the suction line 3 of the foam agent pump 1 via a pressure reducer 26 and a shut-off device 27. Shut-off devices 28, 29 and 30 are also provided.
  • the electronic control of the admixing device is divided into basic electronics 15 and an operating terminal 16 and is structured as follows.
  • the components of the basic electronics 15 are accommodated in a splash-proof housing 15a and are connected by appropriate lines 31 to 39 to the measuring devices 5, 14, the control valve 4, the corresponding shut-off elements 9, 11, 27, 29, 30 and the control panel 16.
  • the control panel 16, which is preferably placed in the driver's cab in the case of mobile fire-fighting vehicles, contains the pushbuttons which are important for foam operation and are described in more detail below, and a control display.
  • a second control panel e.g. be placed near the water pump or elsewhere on the vehicle.
  • the system according to the invention has the following functions.
  • a default value (preselected proportioning rate in percent) is output on the display 16a in the operator terminal.
  • This displayed value can be changed positively and negatively in 0.1% steps within the specified limit values using two buttons.
  • the FOAM pushbutton In the foam operating mode, the FOAM pushbutton must be pressed, which lights up yellow as feedback. With water throughput, an admixture in the amount of the default value is automatically set.
  • the following functions are performed when the FOAM push button is pressed:
  • the valve 30 of the foam agent tank 2 opens, the foam agent pump 1 is activated, the control valve 4, which is in a central position, adjusts the foam agent flow according to the selected admixture and the current water consumption.
  • the flow of the foam agent is indicated by the indicator lamp flashing. If the water flow is stopped when a foam is used, for example when working in shots or in a waiting position, the control valve 4 closes and the foam agent is supplied to the foam agent tank 2 via the shut-off element 9 and overflow valve 10. Likewise, if the amount of foam agent required is low, the foam agent that is not required is fed back into the tank 2.
  • the RINSE button After the foam has been used, the RINSE button must be pressed to rinse the line system.
  • the shut-off element 27 of the rinsing line 24 opens, the shut-off element 30 of the foam tank 2 remains closed, the shut-off element 9 of the tank return closes, the shut-off element 11 of the bypass 12 opens, the foam agent pump 1 runs, the control valve 4 opens fully.
  • the water then flows through the pressure reducer 26 into the line 3, so that the latter and the bypass line 12 are flushed.
  • the EMERGENCY push button must be pressed. This ensures that foam can be generated even in the event of a fault.
  • the NOT push button is pressed, the controlled system is closed by the shut-off device 29 and the bypass 12 is opened by a further shut-off device 11.
  • the foam agent pump 1 remains activated, the tank shut-off valve 30 remains open.
  • a constant flow of foam agent is then entered via the bypass 12 through an orifice 13, the orifice being matched to the foam agent used and to the consumption of the launcher or the largest consumer.
  • the interference-free interfaces in the basic electronics are connected to the interfaces of the operator terminal using standard 5-pin cables.
  • a microprocessor system with the components CPU, PIO, ROM and RAM manages and operates inputs and outputs of the control valve 4, as well as those of the flow meters for water 14 and additives 5 and also provides a documentation and expansion interface.
  • the analog signals from the flow meters for water and additives are fed to the microprocessor system via A / D converters. Influencing the resolution accuracy by pump shocks (ripple) are hidden by digital filters.
  • a selectable, measurement range-dependent default value is provided.
  • the preselected TARGET value in percent appears as the default value on the display of the terminal.
  • the measuring range and the default value of the target value are selected by the commissioning group before use.
  • the default values can also be changed again by changing the software.
  • An automatic fault blanking is implemented via a monitoring device (watchdog), which in the event of a fault causes all important data to be stored in RAM.
  • a self-optimizing control algorithm for the control element 4 ensures an admixture that realizes a control difference with an accuracy of ⁇ 1 digit without overshooting with the highest possible adjustment speed. This type of control avoids all disadvantages of the analog control, such as temperatures, viscosity dependency and damping-related control deviations.
  • the control element is provided with an adjustable starting position (usually a middle position). When the electronics are switched on, this rest position is checked and corrected if necessary.
  • the control unit In order to detect connection and wiring errors when the digital admixing control is started up, the control unit is equipped with rotation direction sensors which output an error code via the display. To log the current values, such as water flow, Additive flow, set admixture values, date and time, a documentation interface is provided for connection to external analog and digital recording devices.
  • the digital admixing control is also suitable for use in stationary systems (eg additive admixture in sprinkler systems). Switching on and activating can be triggered by a fire alarm control panel via quiescent current monitoring.
  • An integrated expansion interface allows external operation of all functions that are available on the terminal (remote control by radio).
  • the device according to the invention can be used wherever two fluids have to be mixed in a certain ratio. So e.g. in the production of lemonades from a concentrate, in water softening, etc.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Control Of Non-Electrical Variables (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Feedback Control In General (AREA)
  • Flow Control (AREA)
  • Accessories For Mixers (AREA)
EP89102495A 1988-05-26 1989-02-14 Einrichtung für Feuerlösch-Anlagen mit einem automatischen, elektronisch gesteuerten Zumischer Expired - Lifetime EP0343320B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89102495T ATE97750T1 (de) 1988-05-26 1989-02-14 Einrichtung fuer feuerloesch-anlagen mit einem automatischen, elektronisch gesteuerten zumischer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3817852 1988-05-26
DE3817852A DE3817852C1 (enrdf_load_stackoverflow) 1988-05-26 1988-05-26

Publications (3)

Publication Number Publication Date
EP0343320A2 EP0343320A2 (de) 1989-11-29
EP0343320A3 EP0343320A3 (en) 1990-06-13
EP0343320B1 true EP0343320B1 (de) 1993-11-24

Family

ID=6355147

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89102495A Expired - Lifetime EP0343320B1 (de) 1988-05-26 1989-02-14 Einrichtung für Feuerlösch-Anlagen mit einem automatischen, elektronisch gesteuerten Zumischer

Country Status (5)

Country Link
EP (1) EP0343320B1 (enrdf_load_stackoverflow)
AT (1) ATE97750T1 (enrdf_load_stackoverflow)
DE (1) DE3817852C1 (enrdf_load_stackoverflow)
ES (1) ES2047588T3 (enrdf_load_stackoverflow)
YU (1) YU47582B (enrdf_load_stackoverflow)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5284174A (en) * 1992-08-18 1994-02-08 Chubb National Foam, Inc. System and method for producing and maintaining predetermined proportionate mixtures of fluids
US5232052A (en) * 1993-02-09 1993-08-03 Hypro Corporation Apparatus and method for controlling the introduction of chemical foamant into a water stream in fire-fighting equipment
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.
ES2109874B1 (es) * 1995-05-17 1998-08-01 Acuna Alonso Antonio Instalacion para la dosificacion de espumogenos o aditivos a una vena de agua.
JPH0989613A (ja) * 1995-09-25 1997-04-04 Smc Corp 流量検出スイッチ
US6047952A (en) 1998-07-14 2000-04-11 Hale Products, Inc. Ball valve assembly
DE102004037627A1 (de) * 2004-08-02 2006-03-16 Pas-Herzog Engineering & Fireprotection Gmbh & Co. Kg Löschsystem und Verfahren zur Verminderung und/oder Vermeidung der Ausbreitung von Rauch und/oder Brand
US20080135263A1 (en) * 2005-02-04 2008-06-12 Graham Douglas Millard Fire Protection Induction System
US8307907B2 (en) 2008-02-28 2012-11-13 Hale Products, Inc. Hybrid foam proportioning system
ES3029932A1 (es) * 2023-12-22 2025-06-25 Guarany Ind E Comercio Ltda Sistema y método de dosificación para aplicación de líquido generador de espuma

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3586027A (en) * 1968-04-01 1971-06-22 John J Fitzgerald Jr Automatic pressure controller
US3970942A (en) * 1974-04-22 1976-07-20 Sun Oil Company Of Pennsylvania Anti-hunting system for valve operator circuit
US4328549A (en) * 1980-01-11 1982-05-04 Olin Corporation Process flow computer control system
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
US4538221A (en) * 1983-04-06 1985-08-27 Halliburton Company Apparatus and method for mixing a plurality of substances
IT1215224B (it) * 1983-08-04 1990-01-31 Ates Componenti Elettron Microcalcolatore a struttura integrata munito di memoria ram non volatile.
ATE74451T1 (de) * 1985-12-30 1992-04-15 Braendle Tony Ag Dosier-regelanornung und dosier-verfahren, insbesondere fuer ein feuerwehr-loeschfahrzeug.
DE3726672A1 (de) * 1986-10-09 1988-04-14 Total Feuerschutz Gmbh Einrichtung fuer feuerloeschfahrzeuge mit einem automatischen, elektronisch gesteuerten zumischer

Also Published As

Publication number Publication date
ATE97750T1 (de) 1993-12-15
EP0343320A3 (en) 1990-06-13
YU108389A (sh) 1992-09-07
YU47582B (sh) 1995-10-24
EP0343320A2 (de) 1989-11-29
DE3817852C1 (enrdf_load_stackoverflow) 1989-07-27
ES2047588T3 (es) 1994-03-01

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