WO2006013180A1

WO2006013180A1 - Extinguishing system and method for preventing and/or reducing smoke and/or fire from spreading

Info

Publication number: WO2006013180A1
Application number: PCT/EP2005/053660
Authority: WO
Inventors: Hans-Jürgen Langel
Original assignee: Watermist-Systems Gmbh & Co. Kg
Priority date: 2004-08-02
Filing date: 2005-07-27
Publication date: 2006-02-09
Also published as: DE102004037627A1

Abstract

The invention relates to an extinguishing system and to a method for preventing and/or reducing smoke and/or fire from spreading. A pipe system (8) of an extinguishing water supply (6) is connected to at least one means (1, 7) which produces an extinguishing mist. A foaming agent container (5) is arranged between the extinguishing water supply (6) and the means (1, 7).

Description

Extinguishing system and method for reducing and / or preventing the spread of smoke and / or fire

The invention relates to an extinguishing system and method for reducing and / or preventing the spread of smoke and / or fire.

Such extinguishing systems have been known for many years and work either with inert gas, for example carbon dioxide (CO ₂ ), and / or with water. The use of carbon dioxide in case of fire has the disadvantage that this extinguishing medium can not be used in the presence of humans or animals. The sole use of water, which is sprayed for example by sprinkler systems or the like on the fire water, has the disadvantage that usually very much water is needed for the extinguishment of the fire, so often the water damage is greater than the fire damage. Furthermore, both extinguishing systems have the disadvantage that leaching of toxic substances from the flue gases produced during the fire does not take place.

It was therefore the object of the present invention to provide a quenching system that does not have the disadvantages of the prior art.

The object is achieved with an extinguishing system for reducing and / or preventing the spread of smoke and / or fire with a piping system that connects a fire water supply with at least one means for generating a Löschnebel and to which a Schaummittelbehälter is connected between the extinguishing water supply and the means is arranged.

Preferred embodiments of the extinguishing system according to the invention are described in the subclaims 2 to 9.

According to the invention, the extinguishing system has a piping system which connects a fire-extinguishing water supply to at least one means for generating an extinguishing mist. As extinguishing water supply every known to the expert extinguishing water supply comes into question. For example, the extinguishing water supply, an existing extinguishing water piping system and / or a general water supply system (city water supply), in which, if necessary, a pressure booster pump is arranged. This makes it possible that the liquid for generating the liquid mist in sufficient quantity and over a sufficiently long period is constantly fed to the extinguishing system. In particular, the extinguishing system according to the invention can be connected in a simple manner to an existing extinguishing water supply network, for example, so that the expense of installing the extinguishing system according to the invention is limited. However, it is also possible that the extinguishing water supply takes place in the form of a water reservoir. This reservoir must either be under pressure or a booster pump must be located between the reservoir and the piping system. Preferably, the extinguishing water supply to a pressure between 5 and 16 bar. In particular, in a connection of the system according to the invention to an existing extinguishing water supply in the extinguishing system according to the invention preferably a filter, more preferably a self-cleaning filter, arranged to prevent silting of the extinguishing system according to the invention. The filter can be actuated automatically or manually to perform readiness for service or test of the system. Preferably, the pressure loss in the filter determined by a differential pressure measurement.

All components of the piping system, but in particular the filter, preferably have bypass lines, so that the functionality of the system according to the invention is maintained during maintenance and / or repair work.

Furthermore, the system according to the invention has a means for generating an extinguishing mist. Preferably, this means is a nozzle, particularly preferably a mist atomizer nozzle, with which a liquid mist can be generated. The liquid mist preferably has droplets with an average diameter of less than 1000 μm diameter, preferably less than 300 μm diameter, particularly preferably less than 100 μm Diameter and also more preferably less than 40 microns. The liquid mist thus generated is in a quasi-floating state in the area of the source of the fire. With the liquid mist, for example, harmful, corrosive and / or particulate fire decomposition products are at least partially bound and precipitated, so that humans animal and environment is not damaged or reduced to a lesser extent by the fire. Furthermore, a liquid mist with such small droplets on a very large surface area, so that these liquid droplets evaporate very quickly and the source of fire thereby extract a lot of energy and thereby extinguish it.

Preferably, the droplet mist at low pressure, i. H. generated with a liquid under 6-16 bar pressure. Preferably, it is further provided that a flow rate per nozzle is a value of 1 to 30 l / min, preferably 2 to 16 l / min, is provided.

Furthermore, the extinguishing system according to the invention comprises at least one foaming agent container, which is arranged between the extinguishing water supply and the means for generating the extinguishing mist. Preferably, one or more nozzles each directly associated with a foaming agent container. In case of fire, the contents of this foaming agent container is conveyed in the direction of the nozzles and distributed there as a foam mist. The foam mist, which preferably settles partially on the fire, smothers the fire at least partially. The foam can also serve for the binding and precipitation of fire decomposition products.

Preferably, the foaming agent used is AFFF foam. The foaming agent can either be atomized to extinguishing mist before the use of extinguishing water or simultaneously with the use of extinguishing water. Preferably, however, the atomization of the foaming agent takes place before the atomization of extinguishing water. Furthermore, it is also conceivable that the extinguishing system according to the invention comprises a plurality of means for generating an extinguishing mist, preferably nozzles, and that these means partially aerosol foaming agent and partially water. Preferably, the foaming agent container is under pressure. However, it is also possible that at the outlet of the container, a suction means, for example a Ventuhdüse is arranged, which sucks the foaming agent from the container. However, this embodiment of the extinguishing system according to the invention is only applicable if the foaming agent to be applied simultaneously with extinguishing water. Particularly preferably, the foam agent container at the outlet to an automatically operable outlet member. This outlet member may for example be a valve that can be activated manually, by a fire protection center and / or any other form of tripping known to the person skilled in the art. The outlet can be actuated on site or by remote release.

In another preferred embodiment of the present invention, the foam container is part of the piping system and has two openings, through the one opening firefighting water flows into the foam container and the foam are thereby conveyed out of the container in the direction of the means for generating an extinguishing agent. Preferably, only foam flows from the foam container at the beginning. As time progresses, however, a water / foaming agent mixture will flow out of the container and, at some point, only water. Preferably, at least on the downstream side, but particularly preferably on both sides of a bursting means, preferably a bursting film is arranged, which is destroyed by the water pressure in each case.

In a further preferred embodiment, a preferably automatically actuated shut-off valve is arranged between the foam container and the extinguishing water supply. With this embodiment of the present invention, it can be ensured, for example, that the foaming agent is first applied to the fire and only then, but preferably immediately thereafter, the extinguishing water is atomized by means of the nozzles. This shut-off valve can preferably be activated manually by a fire protection center and / or any other form of tripping known to the person skilled in the art. The valve may be provided with an initiator. The valve can be actuated on site or by remote release. Further preferably, a check valve is arranged between the foam container and the shut-off valve. This embodiment of the extinguishing system according to the invention ensures that the foam flows exclusively in the direction of the means for generating the extinguishing mist.

The extinguishing system according to the invention preferably has at least one fire, heat, flame and / or smoke detector. As a fire detector an exciter nozzle or a smoke detector is preferably provided. If the detector is located in the vicinity of the extinguishing system, it is advantageously possible according to the invention that false alarms are largely avoided since the location, the detection of smoke and / or fire propagation, also at the point of control of such a smoke and / or fire propagation is. In this case, according to the invention, it can be provided both that the detector has only a local effect, ie that the detector merely activates one or more extinguishing systems arranged in relative proximity to the detector, or alternatively it can be provided that the detector has a global effect , d. H. for all not even in relative proximity arranged systems of the entire building or a building section are activated. If the detector is an exciter nozzle, a local effect of the detector is possible with particularly simple means. If the detector is an electrical or optical smoke detector, for example, a global effect is possible with particularly simple means. The smoke or fire message can result in an interruption and / or shutdown of all protected objects or production processes.

Preferably, the extinguishing system according to the invention has a fire alarm panel, which is functionally connected at least to the outlet of the Schaummittelbehälters, the shut-off valve and optionally the detector. This embodiment has the advantage that the central fire alarm can effect the atomization of the foam and at the same time or afterwards the atomization of the extinguishing water. In the event that the fire alarm panel is connected to the fire detector leads to a message signal of the fire detector that the fire panel automatically causes the nebulization of the foaming agent or the extinguishing water in parallel or sequentially. In a preferred embodiment, the means for generating a Löschnebel, for example, the extinguishing nozzles are preferably arranged to be movable. This embodiment of the present invention has the advantage that these means can always be optimally adapted to the respective purpose. On the other hand, it is also possible that the nozzles move during firefighting and thus obscure a larger area with extinguishing agent.

The extinguishing system according to the invention has the advantage that fires are extinguished very efficiently. In general, the distribution of the foaming agent will already be sufficient to extinguish the fire, so that the damage caused by the deletion of the extinguishing system according to the invention water damage is minimal. Fire decomposition substances are washed out of the air. The extinguishing system according to the invention can be used in the presence of humans or animals.

The extinguishing system according to the invention is particularly suitable for object and / or machine protection. Furthermore, the extinguishing system according to the invention is particularly suitable for the protection of engine test beds, computer rooms, aluminum production plants and / or hot rolling plants. Further preferred applications of the system according to the invention are dangerous goods warehouses and warehouses for combustible substances, tensioning machines, grinding machines, in particular fine grinding machines, all areas in which there are potentially explosive atmospheres and turbines. The corresponding uses are therefore also the subject of the present invention.

Another object of the present invention is a method for reducing and / or preventing the spread of smoke and / or fire using a foaming agent and water, wherein the foaming agent and the water are atomized with at least one means for generating a Löschnebel.

In the method according to the invention, foaming agent is preferably atomized before and / or simultaneously with the water. In the following the invention with reference to Figures 1 and 2 will be explained. These explanations are merely exemplary and do not limit the general inventive concept.

FIG. 1 shows an embodiment of the system according to the invention.

FIG. 2 shows a further embodiment of the extinguishing system according to the invention.

FIG. 1 schematically shows a machine test bench in which a test motor 10, which is arranged on a trolley, is tested for its functionality. In order to extinguish a fire of this engine as quickly as possible, extinguishing nozzles 1, 7 (here M5) are arranged around the engine, the extinguishing nozzles 1 being provided with ball bearings, so that their spray cones can be optimally aligned with the respective motor to be protected. Due to the nozzle orientation, the entire volume area around the object to be protected between floor and ceiling can be evenly supplied with spray. It is even possible to supply areas under the object with spray mist. The nozzles 1, 7 can be designed as twin nozzles, which are aligned at 45 °. Furthermore, fire and / or smoke detectors are arranged in the engine to detect a fire of the engine as quickly as possible. The fire detectors are connected to a fire panel 9. The fire station is equipped with an optical and / or acoustic warning device. Furthermore, the extinguishing system according to the invention has a pipeline system 8, which connects the nozzles 1, 7 with a pump 6, can be pumped with the extinguishing water in the piping system 8. Between the nozzles 1, 7 and the supply pump 6, a foaming agent container 5 is arranged in the pipe power system 8, which contains a foaming agent and which is under pressure. Furthermore, the piping system has a non-return valve 4 and a shut-off valve 3. In the case of a fire or smoke message, the fire alarm panel 9 sends a signal to a shut-off valve that is located in the region of the foaming agent container 5 and opens it. Since the extinguishing agent container is under pressure, the foaming agent flows in the direction of the nozzles 1, 7 and is atomized by them. The check valve 4 prevents the foaming agent from flowing in the wrong direction. As soon as that Foaming agent has been substantially completely sprayed, which is detectable for example by a corresponding pressure drop in the foam container from the fire panel 9, the fire panel 9 opens the valve 3 and fire water flows through the pipes 8 and is so long by means of Düseni, 7, until the fire is completely extinguished.

FIG. 2 shows a further embodiment of the extinguishing system according to the invention, which corresponds essentially to the extinguishing system according to FIG. In the present case, however, the system has an extinguishing water reservoir 14, to which a filter 13 is arranged downstream. The function of the filter is monitored by a differential pressure measurement PI. The person skilled in the art recognizes, however, that this extinguishing system can also be connected to an existing extinguishing water pipeline or to the municipal water supply. Another difference to the extinguishing system according to FIG. 1 is that the foaming agent containers 5 are assigned directly to the nozzles 1. The extinguishing agent containers 5 have two openings, one opening being connected to the pipe system 8 and the other opening being connected to the nozzle 1. As soon as water flows through the piping system 1, a bursting foil, which is located in the region of the inlet opening of the foaming agent container, is destroyed and water flows into the foaming agent container 5 and raises the pressure that another bursting foil, which is arranged at the foaming agent container outlet, bursts and first the foam is distributed or atomized by the nozzles 1. Over time, the extinguishing water and the foam mixed in the foam container, so that the nozzles 1 for a while a mixture of foaming agent and water spray until all the foam has been distributed to the source of fire and the nozzles only spray extinguishing water. The person skilled in the art recognizes that the nozzle 7 does not have a foam agent container, so that in this embodiment of the extinguishing system according to the invention it is possible, depending on the application, to provide nozzles with an extinguishing agent container or not. LIST OF REFERENCE NUMBERS

1 means for producing a deletion mist, here nozzle with ball joint (nozzle here M5)

2 Detector, here Thermo - Differential - Detector

3 solenoid valve

4 non-return valve

5 foam container - cartridge

6 supply pump

7 Means for generating a Lögebebel, here nozzle (also M5), without

ball joint

8 pipeline

9 Fire alarm panel

10 machine status, here test engine on trolley

1 1 extinguishing mist

12 manual release

13 filters

14 water supply

Claims

claims:

1. extinguishing system for reducing and / or preventing the spread of smoke and / or fire with a piping system (8) which connects a fire water supply (6) with at least one means (1, 7) for generating a Löschnebel, and to a foam container (5) connected between the extinguishing water supply (6) and the means (1, 7) is arranged.

2. Extinguishing system according to claim 1, characterized in that the foam container has a, preferably automatically actuated outlet member.

3. extinguishing system according to claim 1 or 2, characterized in that the foaming agent container is under pressure.

4. extinguishing system according to one of the preceding claims, characterized in that between the foaming agent container (5) and the extinguishing water supply (6), a preferably automatically actuated shut-off valve (3) is arranged.

5. extinguishing system according to one of the preceding claims, characterized in that between the foam container (5) and the shut-off valve (3) a check valve is arranged

6. extinguishing system according to one of the preceding claims, characterized in that it comprises at least one detector (2).

7. extinguishing system according to one of the preceding claims, characterized in that it comprises a fire alarm panel (9) which is operatively connected at least to the outlet of the Schaummittelbehälters, the shut-off valve (3) and optionally to the detector (2).

8. extinguishing system according to one of the preceding claims, characterized in that the means (1, 7) are mist atomizing nozzles.

9. extinguishing system according to claim 8, characterized in that the mist atomizing nozzles are arranged adjustable.

10. A method for reducing and / or preventing the spread of smoke and / or fire using a foaming agent and water, wherein the foam and the water are atomized with at least one means (1, 7) for generating a Lögebebel.

1 1. A method according to claim 10, characterized in that the foaming agent is atomized before and / or simultaneously with the water.

12. Use of the extinguishing system according to any one of claims 1-9 or the method according to any one of claims 10 or 1 for object protection and / or machine protection.

13. Use of the extinguishing system according to any one of claims 1-9 or the method according to any one of claims 10 or 1 1, for the protection of engine test beds, computer rooms, aluminum manufacturing plants and / or hot rolling plant.