Extinguishing method and system using a liquid synthetic extinguishing agent and water

Patent metadata

Field	Value
Publication number	US-2016346580-A1
Application number	US-201515111948-A
Country	US
Kind code	A1
Filing date	Jan 9, 2015
Priority date	Jan 17, 2014
Publication date	Dec 1, 2016
Grant date	—

Abstract

A method for extinguishing objects or appliances, in which, once a fire signal has been detected at point in time t 1, a first device ( 17 ) providing an extinguishing agent is triggered, for discharging a liquid synthetic extinguishing agent ( 14 ), via a separating device ( 8 ), a common conveying pipe ( 9 ) and at least one nozzle ( 10 ), and, once a second fire signal has been detected at point in time t 2, a second device ( 18 ) providing an extinguishing agent is triggered for discharging water ( 3 ) or a water-based extinguishing agent via the separating device ( 8 ), the common conveying pipe ( 9 ) and the at least one nozzle ( 10 ) for extinguishing. A system is also provided for extinguishing objects or appliances.

First claim

1 . A method for extinguishing objects or devices, comprising the following method steps preferably carried out in succession:
(a) detecting a first fire signal by at least one event detector ( 11 ) and at least one of a fire alarm or an extinguishing control panel ( 12 ), at the time t 1 , (b) actuating a first extinguishing agent supply device ( 17 ) by the at least one of a fire alarm or an extinguishing control panel ( 12 ) for discharging a liquid synthetic extinguishing agent ( 14 ) by way of a common pipe ( 9 ) and at least one nozzle ( 10 ), (c) detecting a second fire signal at the time t 2 and (d) actuating a second extinguishing agent supply device ( 18 ) and delivering one of a water ( 3 ) or a water-based extinguishing agent via the common pipe ( 9 ) and at least one nozzle ( 10 ) for extinguishing purposes,
wherein the discharge of the liquid synthetic extinguishing agent ( 14 ) and the delivery of the water ( 3 ) or the water-based extinguishing agent is carried out by a separation apparatus ( 8 ) and wherein, furthermore, there is an actuation of the separation apparatus ( 8 ) by the at least one of a fire alarm or an extinguishing control panel ( 12 ), prior to method step (b), for generating a switching position, which releases a transport path of the liquid synthetic extinguishing agent ( 14 ) in the direction of the common pipe ( 9 ) and the at least one nozzle ( 10 ) and completely blocks the transport path of the one of a water ( 3 ) or the water-based extinguishing agent from the second extinguishing agent supply device ( 18 ) in the direction of the common pipe ( 9 ) and the at least one nozzle ( 10 ) and there is an actuation of the separation apparatus ( 8 ) by the at least one of a fire alarm or an extinguishing agent control panel ( 12 ), prior to method step (d), for generating a switching position of the separation apparatus ( 8 ) which releases the transport path of the at least one of a water or the water-based extinguishing agent ( 3 ) in the direction of the common pipe ( 9 ) and the at least one nozzle ( 10 ) and completely blocks the transport path of the liquid synthetic extinguishing agent ( 14 ) from the first extinguishing agent supply device ( 17 ) in the direction of the common pipe ( 9 ) and the at least one nozzle ( 10 ).

2 . The method as claimed in claim 1 , wherein there is purging of the common pipe ( 9 ) and of the at least one nozzle ( 10 ) with a gas after method step (b) of claim 1 .

3 . The method as claimed in claim 1 , wherein the volumetric flow of the synthetic extinguishing agent ( 14 ) emerging from the nozzle ( 10 ) is formed as a target-directed extinguishing agent jet with the geometry of a cone such that the synthetic extinguishing agent remains largely liquid in the center of the cone until the synthetic extinguishing agent reaches the action zone.

4 . The method as claimed in claim 1 , wherein the time t 2 after the complete discharge of the extinguishing agent container ( 1 ) lies after the expiry of the discharge time t c but within a monitoring duration t b , wherein the monitoring duration t b is the sum of the discharge time t c and a checking time t k starting from the time t 1 , where the checking time t k follows the discharge time t c , and furthermore comprising the following step:
examining whether a fire signal is detected during the time t k , in particular by the fire line and/or extinguishing control panel ( 12 ), and whether the inequality (t 1  t c )<t 2 <(t 1 +t b ) is satisfied at the time t 2 .

5 . The method as claimed in claim 1 , wherein the liquid synthetic extinguishing agent ( 14 ) constitutes a non-flammable, non-ignitable, electrically non-conductive liquid with at least one of a vapor pressure of 0.1 to 3 bar at 21° C. or a density of 1400 kg/m 3 to 1800 kg/m 3 at a temperature of 21° C.

6 . The method as claimed in claim 1 , wherein the liquid synthetic extinguishing agent ( 14 ) constitutes one of an FK-5-1-12 (C 4 F 9 OCH 3 ) or a fluoroketone.

7 . A system for extinguishing objects or devices, comprising:
a first extinguishing agent supply device ( 17 ) with a liquid synthetic extinguishing agent ( 14 ) in an extinguishing agent container ( 1 ), on which a valve ( 16 ) is arranged, a second extinguishing agent supply device ( 18 ) with a storage container ( 2 ) with at least one of a water ( 3 ) or a water-based extinguishing agent with a water supply device ( 15 ) and a conveying device ( 7 ), which generates the volumetric flow and pressure for the at least one of a water or the water-based extinguishing agent, a separation apparatus ( 8 ) and a common pipe ( 9 ) and at least one nozzle ( 10 ) embodied to provide the liquid synthetic extinguishing agent first and then, if required, the at least one of a water or a water-based extinguishing agent, at least one event detector ( 11 ), which is connected in a signal-conducting manner to one of a fire alarm or an extinguishing control panel ( 12 ), for detecting the fire signal, wherein
the one of a fire alarm or an extinguishing control panel ( 12 ) is configured to actuate and open the valve ( 16 ) when detecting a first fire signal at the time t 1 , for the purposes of discharging the liquid synthetic extinguishing agent ( 14 ) from the extinguishing agent container ( 1 ) via the common pipe ( 9 ) and the at least one nozzle ( 10 ), and it additionally actuates the conveying device ( 7 ) if a second fire signal is detected at the time t 2 , said conveying device delivers the at least one of a water ( 3 ) or water-based extinguishing agent via the common pipe ( 9 ) and the at least one nozzle ( 10 ) for extinguishing purposes.

8 . The system as claimed in claim 7 , wherein the one of a fire alarm or extinguishing control panel ( 12 ) is embodied and configured in such a way that, if it detects a second fire signal, it actuates a separation apparatus ( 8 ), prior to actuating the conveying device ( 7 ), for generating a switching position which releases the transport path of the one of a water ( 3 ) or water-based extinguishing agent in the direction of the common pipe ( 9 ) and the nozzle ( 10 ) and which, at the same time, blocks the transport path of the liquid synthetic extinguishing agent ( 14 ) from the first extinguishing agent supply device ( 17 ) in the direction of the pipe ( 9 ) and to the nozzle ( 10 ).

9 . The system as claimed in claim 7 , wherein return flow preventers ( 6 ) are arranged downstream of the extinguishing agent supply devices ( 17 , 18 ).

10 . The system as claimed in claim 7 , wherein the at least one nozzle ( 10 ) constitutes one of a full-cone nozzle, a hollow-cone nozzle or a fan nozzle.

11 . The system as claimed in claim 7 , wherein the at least one nozzle ( 10 ) has, at a center, a nozzle bore with a widening opening.

12 . The system as claimed in claim 11 , wherein the at least one nozzle ( 10 ) is embodied in such a way that the volumetric flow of the liquid synthetic extinguishing agent ( 14 ) emerging from the nozzle ( 10 ) is formed as a target-directed extinguishing agent jet with the geometry of a cone such that the synthetic extinguishing agent remains largely liquid in the center of the cone.

13 . The system as claimed in claim 7 , wherein the one of a fire alarm or extinguishing control panel ( 12 ) is configured only to actuate the second extinguishing agent supply device ( 18 ) when the second fire signal is detected at the time t 2 if the one of a fire alarm or extinguishing control panel has examined whether the inequality (t 1 +t c )<t 2 <(t 1 +t b ) is satisfied at the time t 2 , where t c represents the discharge time for the complete discharg

Assignees

• Minimax Gmbh & Co Kg

Inventors

• Boeke Joachim
• Habitzl Wolfgang
• Bechtloff Volker

Classifications

• G08B17/00

  Fire alarms; Alarms responsive to explosion · CPC title

• A62C37/44

  only the sensor being in the danger zone · CPC title

• A62C35/13 Primary

  with a finite supply of extinguishing material · CPC title

• A62C35/68

  Details, e.g. of pipes or valve systems (valves in general F16K) · CPC title

• A62C35/026

  the extinguishing material being put under pressure by means other than pressure gas, e.g. pumps · CPC title