EP0990453B1 - Fire extinguishing device - Google Patents

Abstract

The fire extinguisher has a water tank (7) as well as an extinguishing gas tank (11). By changing over and switching on and off the valves (33) either only water, only gas or water mixed with foaming agent or water mixed with foaming agent and air and/or gas can be supplied to the outlet end (67) of the extinguishing gun (51).

Description

The invention relates to a fire extinguishing device according to the Preamble of claim 1.

A fire extinguishing device is from DE G 88 08 931 U1 known. It includes an extinguishing gun that over a hose that can be wound on a hose drum communicates with a high pressure device. about a three-way valve is the one opposite the nozzle End of the hose connected to two chambers, the one chamber of foam-free fire-fighting water and the other Chamber holds a mixture of water and foam.

This arrangement allows extinguishing agent under pressure, consisting of pure water or a mixture of water and foam, according to the reversal of the Three-way valve can be used at the source of the fire.

A high-pressure fire extinguisher is always off DE 195 09 322 A1 has become known. It includes one Fire gun with a compressed gas tap. By means of a release device is part of the compressed gas redirectable that a force is generated by this, which is a valve opens so that the gas remaining in the compressed gas space passes through the valve can penetrate into the extinguishing agent space. Doing so the extinguishing agent is blown out suddenly and strikes in extremely fine distribution on the source of the fire. It is a setback that always creates setbacks clocked extinguishing device.

From the previous publication DE-Z "Magazin der Feuerwehr", Booklet 9/97, page 524 describes a small fire truck, in which an extinguishing gun is used with the water mist on the one hand and water mist with one Spray jet generated on the other hand next to a full jet can be.

A generic fire extinguisher is from the US A-5,277,256. This fire extinguisher comprises three tank systems, in which separately foam, water and gas is stored. All three tank systems are over three intermediate lines connected with an extinguishing hose, which comprises three integrated separate line sections, over which the extinguishing gun separated foam, water and gas can be supplied. Via appropriate switchover, Opening or closing valves can the three mentioned Extinguishing media foam, water and gas also in together different combinations are delivered mixed.

An extinguisher with a water or foam agent and a pressurized gas container is also from DE-C1-40 29 354 as known. It can also be seen from this that the fire hose on a drum in the box-shaped Housing of the extinguishing device is wound.

According to the previously known DE-U1-295 10 982 a fire extinguisher used with an extinguishing gun that internally three Includes supply lines, with a medium Supply line for gas and two external supply lines each for the supply of water.

According to this prior publication, there is also in the fire hose an electrical cable is integrated.

The object of the present invention is based on the above-mentioned prior art, one more time to provide improved fire extinguishing devices.

The task is according to the invention in accordance with the claim 1 specified features solved. Advantageous configurations the invention are specified in the subclaims.

The present invention provides a significant improvement compared to conventional fire extinguishers created.

The fire extinguishing device according to the invention stands out mainly from the fact that the foam or wetting agent - which is basically in a third tube the extinguishing gun could be fed - even before the Extinguishing gun, i.e. in front of the extinguishing hose, brought together and mixed together and via a common suction line the pump over the fire hose connected to the pump outlet to the fire pistol.

By using the pump premixer, it is sufficient to an extinguishing hose or an extinguishing gun use only two integrated lines or hoses are provided, namely once a line for supplying the extinguishing water or the foam agent or the extinguishing water containing foam, and a second line for supplying the extinguishing gas.

In particular, the valves to produce the desired Extinguishing jet, which is preferred on a portable Platform or a transportable system unit or are provided self-driving on a vehicle from the To operate the extinguishing pistol are preferably one or several electrical lines from the fire gun to Operating unit guided.

In this context, one has proven to be favorable suitable valve arrangement to use, for example a Three-way mixing valve 33 (or e.g. two separately controlling Valves) via which both the electrically controlled Inlet from the fire water tank as well as the inlet and the Admixture of foam agent switched on and off accordingly, can be dosed accordingly.

• Wasser-Vollstrahl
• Wasser-Nebelstrahl (ggf. mit unterschiedlicher Sprühnebelausgestaltung)
• reiner Löschgas-Strahl (beispielsweise CO₂-Löschstrahl)
• Vollstrahl mit Benetzungsmittel
• Nebelstrahl mit Benetzungsmittel
• Schaum-Vollstrahl
• Schaum-Nebelstrahl (Sprühstrahl)
• Löschgas-Schaum (beispielsweise CO₂-Schaumstrahl)

It can furthermore be noted as fundamentally positive that the features and advantages which have already proven advantageous in the prior art can nevertheless be retained in the present fire extinguishing device. In this context, it should be noted as positive that the most varied extinguishing beams can be generated, namely, for example:

• Water jet
• Water mist jet (possibly with different spray mist designs)
• pure jet of extinguishing gas (e.g. CO ₂ extinguishing jet)
• Full jet with wetting agent
• Fog jet with wetting agent
• Foam jet
• Foam mist jet (spray jet)
• Extinguishing gas foam (e.g. CO ₂ foam jet)

Only valves can extinguish water by operating valves or just extinguishing gas to fight the source of the fire be used. Should be in one of the three Tanks already have a mixture instead of pure extinguishing agent a foaming agent and water, so could for example, by switching the valves accordingly only the mixture in this tank to combat the source of the fire.

However, no tank is preferred for holding one Foam agent-water mixture provided, but a separate tank to hold the foam agent next to the Fire water tank. By bringing together the fire water the extinguishing agent can then, for example, be more appropriate Extinguishing agent foam as a full jet or as Fog or spray jet are generated.

It is also possible by mixing the wetting or Foaming agent with air or alternatively with extinguishing gas a corresponding "dry" foam foam produce. However, it can also be under pressure at the same time High-pressure extinguishing water must be supplied.

In a development of the invention it is provided that all in one from the extinguishing gun to the actuation system leading hose, the following partially also is called a hose jacket, not just the two for the supply of the extinguishing agent water on the one hand and the Extinguishing gas to the other provided lines or hoses, but also the at least one or two electrical ones Lines for actuating and controlling the extinguishing system housed together from the fire pistol are. Preferably, this jacket hose in its entirety via a hose reel on the extinguishing system be wound up.

It has proven to be cheap on the extinguishing gas tank, the preferably in a reloadable or replaceable Extinguishing gas pressure bottle exists in the line section from this compressed gas bottle to connect the hose leading to house a pressure reducing valve to the Extinguishing gas pressure from e.g. 250 bar to e.g. 10 to Lower 30 bar.

It has also proven to be advantageous when the The pistol did not blow the corresponding valves suddenly open to dampen the kickback effect. To do this Bypass valves are also used, which are from cleaning technology are known.

As a rule, the fire extinguishing device also includes an electrical generator includes, the heat generated thereby be used to reduce the pressure to extinguish the extinguishing gas pressure. Because by reducing the pressure it comes here in the area of the pressure lowering valve if necessary to a strong cooling down to a possible Icing, which is prevented by the aforementioned heat supply can be.

Finally, it has also proven to be advantageous to place a foam tube on the dispensing gun on the dispensing side. This can preferably be adjusted at least between two or three positions, the foam as such not being active in the basic position. In a first adjustment position, the attached, displaceable foam tube, which is opposite to the discharge direction, for example, is provided with an expanded funnel that allows air to be drawn in, can suck in air through the Venturi effect caused by use and thus contribute to the foam effect when air foam is to be released. In a second adjustment position, the foam tube can also be brought into a position in which the air supply is partially or completely blocked off and extinguishing gas is supplied in the second line, which is then internally in the foam tube, for example with the extinguishing agent likewise supplied or the extinguishing agent water Mix, used for foam formation (extinguishing gas foam, e.g. CO ₂ foam).

It can be seen from the above statements that the Extinguishing device according to the invention for almost every fire class can be used, which is a very fast and enables targeted work. The device can can be used equally in almost all sources of fire, because it enables you to meet local requirements with various means (fire water, Foam agent, extinguishing gas and mixtures thereof) to carry out the optimal fire gas control. Thereby the risk of water damage is also counteracted, because not always, as with other devices, inevitably only needs to be extinguished with water.

Because this device is used equally in all sources of fire it is one that operates the device Person quickly trusted. There is also less Incorrect operations, since they are not for different sources of fire different devices must be used. Through the mentioned initial pressure drop when the Fire pistol will also setbacks in a favorable way attenuated.

Finally, about one or more electrical Lines also information signals from "Löschmann" forwarded to other helpers, even a speech connection by using loudspeaker and microphone is possible.

• es sind hohe Arbeitsdrücke für das Löschwasser erzeugbar, beispielsweise bis 300 bar und mehr;
• es ist ein niedriger Arbeitsdruck für das Löschgas erzeugbar, beispielsweise 10 bis 30 bar;
• durch die Anwendung unterschiedlicher Löschmittel ist ein geringer Löschmittelverbrauch garantiert;
• durch einen hohen Wasserdruck ergibt sich ein Blaseffekt, wodurch der Wasserverbrauch erniedrigt wird;
• durch die einfache Handhabung des Gerätes ist es nicht nur für Feuerwehr, sondern auch für feuerwehrtechnisch geschultes Personal in Industrie, Handwerk und Schulen geeignet;
• das Gerät kann äußerst leicht und kompakt aufgebaut sein, weshalb es auch für kleine Einsatzfahrzeuge geeignet ist;
• durch Verwendung des Generators kann es zusätzlich mit einer Flutlichtanlage ausgestattet sein;
• da das Gerät sehr handlich ist, ist ein gezieltes Arbeiten möglich, wodurch nochmals der Löschmittelverbrauch gesenkt werden kann.

The following further advantages can be mentioned in relation to the extinguishing device:

• high working pressures can be generated for the extinguishing water, for example up to 300 bar and more;
• a low working pressure for the extinguishing gas can be generated, for example 10 to 30 bar;
• the use of different extinguishing agents guarantees low extinguishing agent consumption;
• a high water pressure results in a blowing effect, which reduces water consumption;
• due to the simple handling of the device, it is not only suitable for firefighters, but also for firefighters trained in industry, trade and schools;
• the device can be extremely light and compact, which is why it is also suitable for small emergency vehicles;
• by using the generator, it can also be equipped with a floodlight system;
• Since the device is very handy, targeted work is possible, which can further reduce the consumption of extinguishing agent.

Figur 1 :

in schematischer Darstellung die Feuerlöschbasis der Feuerlöschvorrichtung;

Figur 2 :

eine Querschnittsdarstellung durch den Mantelschlauch gemäß Schnittlinie II-II in Figur 1 bzw. 3;

Figur 3 :

eine schematische Seitenansicht einer Löschpistole;

Figur 4 :

eine untere Ansicht der in Figur 2 angegebenen Löschpistole in schematischer Darstellung;

Figur 5 :

eine rückwärtige Ansicht der Löschpistole unter Darstellung des Bedienfeldes;

Figur 6 :

eine frontseitige Ansicht der Löschpistole;

Figuren 7 bis 9 :

drei Seitendarstellung der Spritzpistole mit unterschiedlich weit ausgefahrenem Schaumrohr.

The invention is explained in more detail below using an exemplary embodiment. Show in detail

Figure 1:

the fire extinguishing base of the fire extinguishing device in a schematic representation;

Figure 2:

a cross-sectional view through the jacket tube according to section line II-II in Figure 1 and 3;

Figure 3:

a schematic side view of an extinguishing gun;

Figure 4:

a lower view of the fire gun shown in Figure 2 in a schematic representation;

Figure 5:

a rear view of the fire gun showing the control panel;

Figure 6:

a front view of the fire gun;

Figures 7 to 9:

three side view of the spray gun with foam tube extended to different extents.

A fire extinguishing device 1 is shown in schematic form in FIG Side view the base or attachment 3 shown which, for example, are built on a common chassis 5 can be. It can be a total transportable unit act, for example, at Need also on a truck or trailer or a small vehicle with a flatbed can be charged. However, it can also be a self-propelled fire extinguishing device act.

The base 3 of the fire extinguishing device 1 comprises an extinguishing water tank 7, one as a rule low-volume foam agent tank 9 and an extinguishing gas tank 11, which is in the embodiment shown from a rechargeable and / or replaceable, connectable extinguishing gas pressure bottle 11 '.

In the embodiment shown, there is also a hose drum 15 provided, of which a fire hose 17 in corresponding length can be developed. The fire hose 17 is on the device side, i.e. base or plant side, with an inlet or connection device 19, as a rule equipped at the center of the end of the hose reel 15.

As can also be seen, is based or annexed 3 a control and / or actuating device 21 with a control panel 23 is provided.

Finally, there is also a pump on the chassis 5, in particular a high pressure pump 25 is provided, the Suction line 27 via a pump premixer 29 with a with the extinguishing water tank 7 on the one hand Water outlet line 7 'and via a second line, namely a foam agent outlet line 9 'with the foam agent tank communicates. With a suitable valve arrangement, for example a three-way mixing valve 33 (or e.g. two separately controlling valves) can be electrical controls both the inlet from the fire water tank 7 open, closed or dosed open and / or the Foam agent supply via the foam agent outlet line 9 'can be prevented, opened or opened in a metered manner.

One on the pressure side in connection with the pump 25 standing pump pressure line 37 is connected to the one supply connection 19a of the inlet and connection device 19 with the hose reel 15 in connection.

Finally, there is also a compressed gas line 39 from an outlet connection of the extinguishing gas pressure bottle 11 ' a second feed port 19b at the central inlet and Connection device 19 firmly connected. In this Compressed gas line 39 is also a pressure reducing or Pressure reducing device 43 is provided on the will be discussed later.

As can be seen from the cross-sectional view through the fire hose 17 results according to Figure 2, it is Extinguishing hose 17 around a jacket hose, which in his Inside at least two hoses or lines 17a and 17b includes, namely an extinguishing water line 17a and one Extinguishing gas line 17b. The structure is such that the Water outlet line 7 'and the foam agent outlet line 9 'via the so-called pump premixer 29, about what the two lines to the common inlet line 27 are brought together, via the pump 25 and the pump pressure line 37 in connection with the fluid line 17a stands, where the compressed gas line 39 with the extinguishing gas line 17b in the fire jacket 17 is connected.

In the following, FIGS. 3 ff. the ones in it schematically shown extinguishing gun, discussed in more detail.

The extinguishing gun 51 has a basic geometric structure comparable to conventional fire-fighting pistols. It comprises a tube 53 with an outlet side thereon attached and adjustable foam tube 55 (Figures 7 to 9), which has a suction funnel on the back 57 is provided. In the middle of the tube 53 is An additional handle 59 is provided above.

The extinguishing pistol is at the back with a slant below protruding handle portion 61, which an actuating element 65 below a protective bracket 63 includes. By pressing the actuator 65 according to the presettings at the front outlet end 67 the appropriate extinguishing agent in the desired form issued.

On the rear side of the handle portion 61 is how is shown in particular in Figure 5, a gun control panel 69 provided. In addition, the desired operating program can be set, this data via the electrical lines also laid in the jacket hose 17 22 (Figure 2) lead to base 3. From the fire pistol 51 off can be set, for example, whether only with Water should be extinguished to the appropriate Control mixing valve 33, so only fire water over the Pump and the fluid line 17a to the fire gun below Pump high pressure and dispense via the outlet end. In Another case can be on the fire gun (control panel 69) can be set, for example, fire water and premixed and foaming agent via the pump and the Fluid line 17a pumped to the extinguishing gun and at the front Expiring to be delivered. Likewise, about this Gun control panel 69 can be set that, for example only extinguishing gas via the second line, i.e. about the Extinguishing gas line 17b is delivered to the extinguishing gun, or that, for example, extinguishing gas is mixed with Foaming agent and / or water etc.

If the foaming agent is to be foamed, extinguishing water is used mixed with foaming agent and with the addition of Extinguishing gas or air foamed.

The additional use of extinguishing gas or air, in particular also for foaming up foaming agents, can be accomplished, for example, solely by adjusting the foam tube 55.
In the position according to FIG. 7, ie with the foam tube completely retracted, a fire water jet, a fire water jet with wetting agent or a pure fire gas jet is usually emitted.

With the foam tube fully extended, for example according to Figure 8, is caused by the adjustment that in the front End region of the outlet pipe of the extinguishing gun 51, where openings or slots are made, over the rear suction funnel 57 by the occurring in operation Venturi effect air is sucked in and the escaping, if necessary, foamed foam agent mixed with extinguishing water becomes.

In the position shown in FIG. 9, only half extended of the foam tube are the suction openings mentioned above closed in the fire gun tube. In this position can now be pressurized extinguishing gas are supplied to the in the tube of the gun 51 foam supplied foam.

By provided at the exit end of the fire gun Spray nozzles 73 (FIG. 6) can be set differently (e.g. by turning) various, provided there Spray nozzles 73 a different spray and Discharge effect, especially a different fog formation, Foaming, a half or full jet supplement be generated.

Since usually the pressure in the extinguishing gas bottle 11 'to can be well over 200 bar, that is what is mentioned there Pressure reducing valve 43 is provided, for example the gas pressure to 10 to 25 bar (or more or less) decreases. Because in this case by reducing the pressure and the gas release cooled the pressure reducing valve strongly up to the risk of ice formation further preferably on the basis 3 a device for Heating of the pressure reducing valve 43 is provided. To serves a base 3 if necessary, i.e. e.g. on the chassis 5, additionally provided or switched on separately Electricity generator that runs on fuel, whereby the heated exhaust gases of the electricity generator for warming up of the pressure reducing or reducing valve 43 used can be.

Such a generator can also, for example yet a lighting system to be powered especially in the dark to illuminate the work area. The lamps can also be based on the Chassis arranged or set up flexibly and over separate electrical lines connected to the generator become.

For completeness, it is mentioned that about the electrical line 22 between the fire gun and the system for example, also a voice and / or radio connection can be set up to make contact with others to be able to maintain personnel in action.

Claims (20)

1. Fire extinguishing device having the following features:

   having a plant or base (3) which comprises various components,

   having an extinguishing hose (17) leading to an extinguishing pistol (51),

   having at least one extinguishing water connection and/or one extinguishing water tank (7) and also at least one foaming agent connection and/or one foaming agent tank (9) and having at least one extinguishing gas tank (11),

   by changing over and/or connecting and disconnecting valves (33), the outlet end (67) of the extinguishing pistol (51) can be supplied either with only extinguishing water or only extinguishing gas or extinguishing water admixed with foaming agent or extinguishing water admixed with foaming agent and air and/or extinguishing agent gas,

   having a pump (25),

   characterized by the following further features

   a pump pre-mixer (29) is provided, which is connected upstream of the pump (25), and

   an intermediate extinguishing water line coming from the extinguishing water connection or from the extinguishing water tank (7), and an intermediate foaming agent line coming from the foaming agent connection or from the foaming agent tank (9) lead via the pump pre-mixer (29) to a common intake line of the pump (25).
2. Fire extinguishing device according to Claim 1, characterized in that both the extinguishing water and the extinguishing agent or the extinguishing agent gas can be supplied to the extinguishing pistol (51) via the extinguishing hose (17).
3. Fire extinguishing device according to Claim 1 or 2, characterized in that, between the base or plant (3) and the extinguishing pistol (51), at least two lines or hoses are provided, namely a fluid line (17a) for supplying the extinguishing agent water and/or foaming agent and a second extinguishing gas line (17b) for supplying extinguishing gas.
4. Fire extinguishing device according to Claim 3, characterized in that the fluid line (17a) and the extinguishing gas line (17b) are integrated in the extinguishing hose (17), constructed as a jacketed hose.
5. Fire extinguishing device according to one of Claims 1 to 4, characterized in that, between the base or plant (3) and the extinguishing pistol (51), at least one, preferably at least two, electric lines (22) are provided in order to control the fire extinguishing device (1) from the extinguishing pistol (51).
6. Fire extinguishing device according to Claim 5, characterized in that the at least one, preferably the at least two, electric lines (22) are integrated in the extinguishing hose (17) constructed as a jacketed hose, or are laid parallel to the latter.
7. Fire extinguishing device according to one of Claims 1 to 6, characterized in that the extinguishing hose (17) with the integrated fluid line (17a) and the extinguishing gas line (17b) can be wound onto a hose reel (15) together with the at least one further electric line (22) provided.
8. Fire extinguishing device according to one of Claims 1 to 7, a pump (25) additionally being provided on the base or the plant (3), via which pump the extinguishing water and/or the foaming agent can be supplied to the extinguishing pistol (51) under pressure, characterized in that the pump is a high-pressure pump.
9. Fire extinguishing device according to one of Claims 1 to 8, characterized in that the pump pressure line (37) coming from the outlet side of the pump (25) leads to a feed connection (19a) of a hose reel (15).
10. Fire extinguishing device according to one of Claims 1 to 9, characterized in that the pressurized gas line (39) coming from the extinguishing gas tank (11) to the extinguishing gas pressure bottle (11') leads to a further feed connection (19b) on a hose reel (15).
11. Fire extinguishing device according to one of Claims 1 to 10, characterized in that a pressure reducing device (43) is provided in the pressurized gas line (39) leading away from the extinguishing gas tank (11), preferably upstream of a feed connection (19b) on a hose reel (15).
12. Fire extinguishing device according to Claim 11, characterized in that the pressure reducing device (43) is protected against freezing by a heating device.
13. Fire extinguishing device according to Claim 12, characterized in that the heating device comprises a generator device, via which the pressure reducing device (43) can be warmed directly or by means of the warmed exhaust gases produced by the generator device.
14. Fire extinguishing device according to one of Claims 1 to 13, characterized in that an actuating or operating device (69) for performing different extinguishing steps is provided on the extinguishing pistol (51).
15. Fire extinguishing device according to Claim 14, characterized in that the operating device (69) for at least one electric line (22) is connected to the base or plant (3).
16. Fire extinguishing device according to one of Claims 1 to 15, characterized in that a means of changing over to foam formation is provided on the extinguishing pistol (51).
17. Fire extinguishing device according to Claim 16, characterized in that the device for switching on or changing over in order to produce foam formation comprises an adjustable foaming pipe (55) which, in one operating position, permits foaming by means of air and, in another operating position, permits foaming by means of extinguishing gas.
18. Fire extinguishing device according to Claim 16 or 17, characterized in that the foaming pipe (55) is widened in the shape of a funnel on its rear side located opposite the discharge side, in order, in one operating position, to take in air on account of the Venturi effect for the purpose of foam formation.
19. Fire extinguishing device according to one of Claims 16 to 18, characterized in that, in another operating position of the foaming pipe (55), openings or slots for taking in air are closed and outlets at the end of the extinguishing gas supply in the extinguishing pipe (53) are opened for the purpose of foam formation by using extinguishing gas.
20. Fire extinguishing device according to one of Claims 16 to 19, characterized in that, in a third adjusting position, the foaming pipe (55) suppresses any foam formation.

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