EP2750770B1 - Fire fighting in tunnels - Google Patents

Description

The subject matter relates to a fire fighting device and a method for controlling fires in tunnels, wherein a quenching fluid is passed via a main extinguishing fluid line to the section lines and discharged by means of extinguishing nozzles.

Fire fighting in tunnels is enormously important as there is an acute danger to life for people inside the tunnel immediately after a fire. In particular, by heavy transports, which occasionally also transport easily inflammable materials and the intrinsic risk of accidents in road traffic, the risk of fire in tunnels is particularly high. WO 03/033079 discloses a fire fighting device according to the preamble of claim 1.

The firefighting equipment used in tunnels for firefighting must be so dimensioned that, in the event of fire, sufficient extinguishing fluid is brought to the source of the fire to at least suppress the fire. The extinguishing fluid is distributed via main extinguishing fluid lines on section lines. The section lines are usually connected via valves with the main extinguishing fluid line and the valves can be opened or closed event-controlled. Thus, it is possible to open the valves associated with the section lines in which a fire has been located. The main extinguishing fluid line must be dimensioned so that it represents a sufficiently low flow resistance to the extinguishing fluid, so that the on the section lines connected nozzles are supplied with sufficient fluid. Depending on the number of section lines connected to a main quench fluid line in the event of a fire, determine the flow rate of quench fluid through the main quench fluid line and dimension the main quench fluid line accordingly. For this reason, the main extinguishing fluid line with increasing number of simultaneously activated section lines to be dimensioned steadily larger. This leads to increased costs, in particular for the main extinguishing fluid line. Since these are usually connected over long distances with the fluid supply, in particular with fluid pumps, the dimensioning of the main extinguishing fluid line is a decisive cost criterion for a fire-fighting device.

For this reason, the object of the object to provide a firefighting device available, which allows efficient fire fighting at the same time low cost of a main extinguishing fluid line.

This object is solved objectively by a fire fighting device according to claim 1 and a method according to claim 13.

It has been recognized that a tunnel can be divided into longitudinal sections. In each longitudinal section section lines may be provided which secure this longitudinal section. A longitudinal section may also be divided into transverse sections. Transverse sections can subdivide the longitudinal section of the tunnel into individual sections in its width. This means that several section lines are provided per longitudinal section, each one Cross section are assigned. A transverse section is assigned to a section dividing the width of the tunnel. The overall width of the tunnel is essentially covered by the total number of transverse sections of a longitudinal section.

It has been recognized that a fire is assigned to a cross section where a fire is located. By means of a fire localization device can be located in which transverse section a fire takes place substantially. By a sufficiently accurate localization of the fire within the longitudinal section dividing the transverse sections, it is possible to connect by means of a control device, the main extinguishing fluid line with a limited selection of the section lines.

It has been recognized that in a localized fire, not always all section lines of a longitudinal section must be connected to the main extinguishing fluid line. Rather, it has been recognized that with a sufficiently accurate localization of a fire only those section lines must be connected to the main extinguishing fluid line, which adjoin the fire. As a result, the number of section lines and fluid nozzles to be supplied is reduced compared to conventional devices, since not all section lines are connected to the main extinguishing fluid line, but only selected ones. The dimensioning of the main extinguishing fluid line can thus be smaller than in conventional fire fighting equipment. The sizing of the main quench fluid line need only be such that a limited selection from the section lines is sufficient Extinguishing fluid to be supplied. This leads to significant cost savings in the firefighting device at the same time good or even better firefighting results.

As already mentioned, a fire is fought over discharged by Löschfluiddüsen extinguishing fluid. The extinguishing fluid is preferably water or surfactant-added water. To deploy the extinguishing fluid, extinguishing fluid nozzles are arranged in the section lines. These are preferably distributed along the longitudinal direction of a section line over a longitudinal section. Preferably, at least three fluid nozzles are provided per section line. It is also possible that four fluid nozzles are provided per section line. In particular, the fluid nozzles can be arranged at intervals of three to six meters from one another along the longitudinal direction in the section lines.

Starting from the main extinguishing fluid line there are supply lines to the section lines. The section lines are substantially parallel to the longitudinal direction of the tunnel. Section lines within a longitudinal section are preferably arranged parallel to one another, so that a plurality of section lines running parallel to one another divide a longitudinal section into transverse sections.

According to an advantageous embodiment, it is proposed that the transverse sections of a lane are assigned in the tunnel. In a three-lane tunnel thus three transverse sections may be provided, each lane being associated with a transverse section. In railway tunnels can also be several lanes through a plurality of rail tracks may be formed, which are divided accordingly by transverse sections. Preferably, however, the tunnel is a road tunnel. A section line is thus assigned to a lane within the tunnel. Preferably, a section line is arranged centrally to the transverse section, in particular centrally to the lane. As a result, the section pipes are evenly distributed across the width of the tunnel, thereby providing the best possible coverage of the tunnel surface.

In tunnels, a parking bay, an emergency stop or an emergency exit is often provided in sections. Vehicles that catch fire often prefer to park in such emergency bays or parking bays. Thus, just such areas within a tunnel are particularly fire-prone and require special attention with regard to fire protection. A transverse section is preferably assigned to such a parking bay, an emergency stop bay or an emergency exit in the tunnel. Thus, a fire can be safely controlled by means of this section associated section lines. On the other hand, however, the additional cross section means that at least one further section line within the longitudinal section has to be charged with extinguishing fluid. In a normally three-lane tunnel, the parking bay causes a fourth lane to be secured. This leads to a further cross section and thus to a further section line. The main extinguishing fluid line may preferably be designed to supply a total of three section lines within a longitudinal section with extinguishing fluid. Furthermore, the main extinguishing fluid line may be designed so that two longitudinal sections are simultaneously supplied with extinguishing fluid. As a result, the main quench fluid line is designed for either a maximum of three or a maximum of six section lines. If, in addition, the parking bay is secured, at least one further section line is added, which could lead to underdimensioning of the main extinguishing fluid line. However, this is objectively avoided by the fact that the localization of the fire not all section lines must be connected within a longitudinal section with the main extinguishing fluid, but only a limited selection of the available section line. In the case of a fire within a parking bay this would be localized there and at least the section line, which is assigned to the transverse section of the parking bay, connected to the main extinguishing fluid line.

In each longitudinal section, three or four section lines are preferably provided, which divide the longitudinal section into three or four transverse sections. The subdivision of the longitudinal section into transverse sections may be dependent on the number of lanes within the tunnel or on the width of the tunnel. Preferably, a transverse section may have a width between two and four meters. Depending on the overall width of the tunnel then three or four transverse sections may be provided.

According to an advantageous embodiment, it is proposed that the limited selection from the section lines relates to three or fewer section lines. In the case of a four-lane tunnel, this could mean that only three section lines are connected in case of fire to one main extinguishing fluid line per longitudinal section. Preferably, the section lines should be charged with quench fluid that is near the localized fire. For this reason, it is proposed that the limited selection relates to the section line, in the respective transverse section of the fire is located. In addition to this section line, at least one further section line can be connected to the main extinguishing fluid line, whose respective transverse section directly adjoins the transverse section in which the fire is located. If a fire is detected, for example, in a central traffic lane, the middle transverse section and the transverse sections lying to the left and right thereof or the section lines assigned to these transverse sections can be connected to the main extinguishing fluid line. If a fire is located in a parking bay, preferably the section line associated with the parking bay may be connected to the main extinguishing fluid line and the section lines associated with the transverse sections adjoining the parking bay, for example the right lane and the middle lane. Thus, the section line of the immediately adjacent transverse section can be connected to the main extinguishing fluid line and the section line of the transverse section adjacent to this transverse section.

According to an advantageous embodiment, it is proposed that the section line of a longitudinal section are connected via at least two supply lines to the main extinguishing fluid line. This means that two separate supply lines lead to the main extinguishing fluid line and these two supply lines are connected to the section lines. Section lines are thus over two Supply lines connected to the main extinguishing fluid line. A supply line is secured against the main extinguishing fluid line by a valve. In order to prevent extinguishing fluid from flowing from one supply line into the other supply line via the section line, it is proposed that check valves be provided between the section lines and the supply lines. In this case, when opening a valve of a first supply line extinguishing fluid flow through this supply line in the section line and the check valve, which is arranged between the section line and the other supply line, can prevent further flow of the extinguishing fluid in the second supply line.

The aforementioned arrangement of check valves between the supply line and the section lines is particularly advantageous when at least two section lines are connected within a longitudinal section with only one supply line, all other section lines, however, with two leads. In this case, at least one supply line and a valve between the main extinguishing fluid line and the section line can be saved.

According to an advantageous embodiment, it is proposed that the supply line are connected in each case via a valve with the main extinguishing fluid line. A supply line may connect one or more section lines to the main extinguishing fluid line. To bring extinguishing fluid into the section line, the valve, which separates the main extinguishing fluid line from the supply line, can be opened. A valve can be opened depending on the location of the fire, so that only the section lines via the supply line with the Main extinguishing fluid line are connected, which are necessary for effective fire fighting.

According to an advantageous embodiment, it is proposed that the respective section lines assigned to a longitudinal section form a set of section lines. That is, the section lines associated with the transverse sections of the longitudinal section form the set of section lines. In a longitudinal section thus a set of section lines is provided. A plurality of sets of section conduits may be provided in a plurality of longitudinal sections. This means that one set of section lines can be provided per longitudinal section. Preferably, at a localization of a fire at least two sets of section lines can be activated, wherein only one selection of section lines is connected to the main extinguishing fluid line per set of section lines.

According to an advantageous embodiment, a section line is arranged over a length of 20m parallel to the longitudinal direction of the tunnel. Lengths of 30 or 40m are also possible.

The section line is equipped with at least three extinguishing fluid nozzles, which are preferably distributed equidistantly over the entire length of the section line.

An extinguishing fluid nozzle is preferably an extinguishing spray nozzle or a sprinkler nozzle. A Löschnebeldüse has the advantage that it finely atomized the extinguishing fluid and thus allows a good fire fighting, in which the source of fire very well is cooled by the fine water mist. Extinguishing mist is preferably generated at high pressures, which are in particular over 2.5 bar, 5 bar or even 10 bar.

In order to be able to safely combat a fire within a parking bay, an emergency stop bay or an emergency exit, it is proposed that two section lines are provided one behind the other in the longitudinal direction. Each of the two section lines may be associated with a separate set of section lines. It is also possible that the two section lines are assigned or form a common set of section lines.

According to an advantageous embodiment, it is proposed that the section lines of a longitudinal section are connected in each case via at least two supply lines to the main extinguishing fluid line. In this case, the section lines are each connected to the supply lines to the main extinguishing fluid line and can be supplied via both supply lines with extinguishing fluid. In order to prevent a hydraulic short circuit between supply lines via the section lines, check valves between the supply lines and the section lines, as already explained above, are proposed. Further, when the section conduits located at the opposite ends of a longitudinal section are connected to the main extinguishing fluid line via only one of the supply lines, it is possible to connect a limited number or selection of section conduits to the main extinguishing fluid line by opening a valve of a supply line. Depending on the open valve between each supply line and Hauptlöschfluidleitung be the common Sections and the section line at each end of the width of the tunnel with extinguishing fluid fed.

Another aspect is a method according to claim 17. First, a fire must be located with sufficient certainty. In this case, the fire can preferably be assigned to a transverse section, wherein a transverse section divides the longitudinal section of a tunnel in its width. Depending on the location of the fire, a limited selection of the respective section lines assigned to a transverse section can then be connected to the main extinguishing fluid line. For this purpose, the corresponding valves that separate the section line from the main extinguishing fluid line, can be opened or closed.

According to an advantageous embodiment, it is proposed that the section lines are connected to the main extinguishing fluid line, which are assigned to the transverse section in which the fire has been located. Furthermore, in addition, the section conduits may be connected to the main extinguishing fluid line immediately adjacent to the transverse section in which fire has been located.

According to an advantageous embodiment, it is proposed that from a total of N (with N: natural number) N-1 or N-2Section lines are connected to the main extinguishing fluid line in the event of a localized fire.

The aforementioned method can also be realized as a computer program or as a computer program stored on the storage medium. Here are the said method steps in the control device or the fire localization device by a computer program which is programmed accordingly carried out.

The features of the methods and devices are freely combinable. In particular features of the description and / or the dependent claims, even in complete or partial circumvention of features of the independent claims, in isolation or freely combined with each other independently be inventive.

The article will be explained in more detail with reference to drawings showing an exemplary embodiments.

Fig. 1

einen schematischen Aufbau einer Brandbekämpfungseinrichtung in einem Tunnel;

Fig. 2

eine aktivierte Brandbekämpfungseinrichtung nach Fig. 1 bei einem Brand in einem ersten Querabschnitt;

Fig. 3

eine aktivierte Brandbekämpfungseinrichtung nach Fig. 1 bei einem Brand in einer Nothaltebucht.

Fig. 4

eine aktivierte Brandbekämpfungseinrichtung nach Fig. 1 bei einem Brand in einem weiteren Querschnitt.

In the drawing show:

Fig. 1

a schematic structure of a fire fighting device in a tunnel;

Fig. 2

an activated firefighting after Fig. 1 in a fire in a first transverse section;

Fig. 3

an activated firefighting after Fig. 1 in a fire in an emergency stop bay.

Fig. 4

an activated firefighting after Fig. 1 in a fire in another cross section.

Fig. 1 schematically shows a tunnel with three lanes 1, 3, 5 and an emergency stop 7. The tunnel is along its Longitudinal divided into four longitudinal sections A, B, C and D. Each longitudinal section A, B, C, D is subdivided into transverse sections a, b, c, d. It can be seen that the longitudinal section A is subdivided into the transverse sections a, b, c. The transverse sections a, b, c divide the tunnel into sections of equal width. The longitudinal sections B, C have a further transverse section d, which is associated with the emergency stop bay 7. The transverse sections a, b, c are assigned to the lanes 1, 3, 5.

Furthermore, it can be seen that a section line 2 is provided in each transverse section a, b, c, d. Hereinafter reference is made to the section lines 2 in the way that, for example, the section line 2 _{Aa is} assigned to the longitudinal section A and the transverse section a and, for example, the section line 2 _Bd is assigned to the longitudinal section B and the transverse section d.

The section lines 2 are connected to a main extinguishing fluid line 4 via valves 5. The connection between the main extinguishing fluid line 4 and the section lines 2 takes place via the valves 5 and the supply lines 14.

The valves 5 _A1 and 5 _A2 connect the section lines 2 _Aa , 2 _Ab , 2 _Ac with the main extinguishing fluid line 4 via the supply line 14 _A1 , 14 _A2 .

Corresponding suffixes for the designation of the valves as well as the supply lines are also used below for the longitudinal sections B, C, D.

The main extinguishing fluid line 4 is connected to an extinguishing fluid supply 8, which is for example a pump and can carry extinguishing fluid under pressure to the section lines 2.

Further, fire locators 16 are disposed in the tunnel. These can be, for example, cameras or flue gas detectors. The fire localization devices 16 are connected to a control device 6. Depending on a location of a fire in a transverse section 2, the control device 6 can control the valves 5, such that they are opened or closed.

To reduce the number of valves 5, it is proposed that section lines 2 are partially overlapped with two control lines 14 and are provided to prevent hydraulic short-circuit check valves 12.

By way of example, the section line 2 _Ab is connected in longitudinal section A to both the supply line 14 _A1 and the supply line 14 _A2 . If one of the valves 5 _A1 or 5 _A2 opens, the non-return valve 12 assigned to the opposite supply line 14 closes so that a hydraulic short circuit is prevented. With the aid of this arrangement, it is possible to feed in each case a selection of three section lines 2 with extinguishing fluid by means of two valves 5. It can be seen that in the transverse section b, the section line 2 _{Ab is} connected to the main extinguishing fluid line 4 via the two supply lines 14 _A1 and 14 _A2 , whereas the section lines 2 _Aa and 14 arranged at opposite ends 2 _{Ac is} connected to only one supply line 14 _A1 or 14 _A2 .

In the area of the emergency stop bay 7, for example, a separate supply line 14 _{Bc can be} connected to the main extinguishing fluid line 4 via the valve 5 _Bc and supply the section lines 2 _Bd and 2 _Cd with extinguishing fluid. Further, the section lines 2 _Bd and 2 _Cd can be supplied via the section line 14 _B2 as well as 14 _C1 .

It is also possible that per section line 2, as shown for example in longitudinal section D, a separate supply line 14 is provided.

The supply lines 14 are shown only as an example, it is only advantageous that when localizing a fire, only a selection of section lines 2 within a longitudinal section A, B, C, D is connected to a main extinguishing fluid line 4.

This is exemplified in the following Fig. 2 shown.

In the Fig. 2 By way of example, a fire in the cross section Ac has been localized by the fire locator 16A. The controller 6 receives a corresponding localization signal from the fire locator 16A. In the control device 6, a control signal is then transmitted to the valve 5 _A2 . The valve 5 _A2 is opened, so that extinguishing fluid flows via the main extinguishing fluid line 4 into the supply line 14 _A2 . The supply line 14 _A2 is connected to the section lines 2 _Ab and 2 _Ac , so that extinguishing fluid from the arranged there Löschnebeldüsen 10 emerges. About the check valve 12 from the supply line 14 _A1 prevents quenching fluid from the supply line 14 _A2 via the section line 2 _{Ab flows} into the supply line 14 _A1 . It can be seen that only a selection, namely two section lines 2 _{Ab, Ac} 2 are supplied with extinguishing fluid by only the valve 5 is opened _A2. The fire in the cross section Ac is effectively combated. Characterized in that also extinguishing fluid is discharged in the transverse section Ab, a violation of the fire is prevented in other sections.

• Die Brandlokalisationseinrichtung 16B lokalisiert den Brand in Querabschnitt Bd. Über die Steuerleitung wird ein entsprechendes Lokalisationssignal an die Steuereinrichtung 6 übermittelt. Die Steuereinrichtung 6 stellt fest, dass der Querabschnitt Bd innerhalb einer Nothaltebucht 7 liegt. Dies führt dazu, dass zunächst ein Steuersignal an das Ventil 5_Bc übermittelt wird, welches die Hauptlöschfluidleitung 4 mit der Zuleitung 14_Bc verbindet. Über die Zuleitung 14_Bc strömt das Löschfluid dann in die Sektionsleitungen 2_Bd und 2_Cd. Löschfluid wird aus den Löschdüsen 10 dieser beiden Sektionsleitungen 2_Bd, 2_Cd ausgebracht.

In Fig. 3 is exemplified that a fire has been located in a transverse section Bd. In such a fire, the following happens:

• The fire localization device 16B locates the fire in the transverse section Bd. A corresponding localization signal is transmitted to the control device 6 via the control line. The control device 6 determines that the transverse section Bd lies within an emergency stop bay 7. As a result, first of all a control signal is transmitted to the valve 5 _Bc which connects the main extinguishing-fluid line 4 to the supply line 14 _Bc . Via the supply line 14 _Bc , the extinguishing fluid then flows into the section lines 2 _Bd and 2 _Cd . Extinguishing fluid is discharged from the extinguishing nozzles 10 of these two section lines 2 _Bd , 2 _Cd .

In addition, the control device 6 can transmit a control signal to the valve 5 _B2 , so that the valve 5 opens _B2 . Extinguishing fluid then flows in addition via the main extinguishing fluid line 4 in the section lines 2 _Bb and 2 _Bc , so that 10 extinguishing fluid is discharged via the extinguishing nozzles arranged there.

• Die Brandlokalisationseinrichtung 16C detektiert einen Brand auf der Fahrspur 5 im Längsabschnitt C und übermittelt ein entsprechendes Branddetektionssignal an die Steuereinrichtung 6. Die Steuereinrichtung 6 übermittelt daraufhin ein Steuersignal an das Ventil 5_C1, welches daraufhin öffnet. Über die Zuleitung 14_C1 gelangt Löschfluid sowohl in die Sektionsleitung 2_Cb, die Sektionsleitung 2_Cc als auch die Sektionsleitung 2_Cd. Das an der Zuleitung 14_Bc angeordnete Steuerventil 12 verhindert, dass Löschfluid in die Zuleitung 14_Bc bzw. in die Sektionsleitung 2_Bd strömt. Das Rückschlagventil 12 an der Zuleitung 14_C2 verhindert, dass Löschfluid über die Zuleitung 14_C2 zur Sektionsleitung 2_Ca fließt. Löschfluid wird in diesem Fall über die Düsen in den Sektionsleitungen 2_Cb, 2_Cc und 2_Cd ausgebracht. Auch hier ist zu erkennen, dass aus den Löschdüsen in der Sektionsleitung 2_Ca kein Löschfluid ausgebracht wird, so dass auch hier lediglich eine begrenzte Anzahl an den Querabschnitten A, B, C, D zugeordneten Sektionsleitungen 2 mit Löschfluid beschickt wird.

Fig. 4 shows another example in which a fire is located, for example, in the cross section Cc. In such a fire, the following happens:

• The fire localization device 16C detects a fire on the lane 5 in the longitudinal section C and transmits a corresponding fire detection signal to the control device 6. The control device 6 then transmits a control signal to the valve 5 _C1 , which then opens. Extinguishing _fluid passes through the supply line 14 _C1 into both the section line 2 _Cb , the section line 2 _Cc and the section line 2 _Cd . The control valve 12 arranged on the supply line 14 _Bc prevents _{extinguishing fluid} from flowing into the supply line 14 _Bc or into the section line 2 _Bd . The check valve 12 on the supply line 14 _C2 prevents extinguishing _{fluid from} flowing via the supply line 14 _C2 to the section line 2 _Ca. Extinguishing fluid is discharged in this case via the nozzles in the section lines 2 _Cb , 2 _Cc and 2 _Cd . Again, it can be seen that no extinguishing fluid is discharged from the extinguishing nozzles in the section line 2 _Ca , so that here too only a limited number of the cross sections A, B, C, D associated section lines 2 is charged with extinguishing fluid.

With the aid of the subject device, it is possible to dimension a main extinguishing fluid line 4 smaller than would be necessary if an entire longitudinal section were charged with extinguishing fluid. This causes that at the same time good firefighting success, the installation costs will be reduced.

It should be noted that in the present case, the main extinguishing fluid line 4 and the valves 5 are shown outside the tunnel, which was only for clarity. In particular, the main extinguishing fluid line 4 as well as the valves 5 can be arranged inside the tunnel. The spatial arrangement of the section line 2 and the supply lines 14 is chosen purely by way of example and will be adapted to local conditions.

Claims (15)

1. Fire-fighting device configured for tunnels, comprising:

   - at least one main extinguishing fluid line (4),

   - at least two sectional lines (2) connected to the main extinguishing fluid line (4), wherein

   - the sectional lines (2) are allocated to a longitudinal section (A, B, C) of a tunnel and

   - a control device connected a fire localisation (16) device, wherein the control device (16) connects the main extinguishing fluid line (4) to a limited selection of the sectional lines (2) depending on a fire localisation, characterized in that

   - the sectional lines (2) are allocated to one of at least two transverse sections (a, b, c) subdividing the longitudinal section (A, B, C), respectively, and

   - the fire localisation device (16) allocates a localised fire to a transverse section (a, b, c).
2. Fire-fighting device according to Claim 1, characterised in that the sectional lines (2) have extinguishing fluid nozzles (10) distributed in the longitudinal direction, respectively, and/or the sectional lines (2) run essentially parallel to one another in the longitudinal direction.
3. Fire-fighting device according to one of Claims 1 to 3, characterised in that the transverse sections (a, b, c) are allocated to a traffic lane (1, 3, 5) in the tunnel and that the sectional lines (2) are preferably arranged essentially centrally in relation to a traffic lane (1, 3, 5) of the allocated transverse section (a, b, c).
4. Fire-fighting device according to one of Claims 1 to 4, characterised in that a transverse section (a, b, c) is allocated to a parking bay, an emergency stopping bay or an emergency exit in the tunnel, and/or that two in longitudinal direction consecutive sectional lines (2) are allocated to a parking bay, an emergency stopping bay or an emergency exit.
5. Fire-fighting device according to one of Claims 1 to 4, characterised in that the sectional lines (2) are allocated respectively to one of at least three or four transverse sections (A, B, C) subdividing the longitudinal section (a, b, c).
6. Fire-fighting device according to one of Claims 1 to 5, characterised in that the limited selection of the sectional lines (2) relates to three or fewer sectional lines, and/or the limited selection relates to the sectional line (2) in the respective transverse section (a, b, c) of which the fire is localised and that the limited selection additionally relates to at least the sectional line (2) of which the respective transverse section (a, b, c) is immediately adjacent to the transverse section (a, b, c) in which the fire is localised.
7. Fire-fighting device according to one of Claims 1 to 6, characterised in that the sectional lines (2) of a longitudinal section (A, B, C) are connected to the main extinguishing fluid line (4) via at least two supply lines (14) and that at least one of the sectional lines (29 is connected to both supply lines (14), respectively via a non-return valve.
8. Fire-fighting device according to one of Claims 1 to 7, characterised in that the supply lines (14) are connected to the main extinguishing fluid line (4) respectively via a valve and that the control device connects the valves depending on the fire localisation.
9. Fire-fighting device according to one of Claims 1 to 8, characterised in that the sectional lines (2) allocated to a longitudinal section (A, B, C), respectively, form a set of sectional lines (2) and that a plurality of sets of sectional lines (2) are allocated to a plurality of longitudinal sections (A, B, C).
10. Fire-fighting device according to one of Claims 1 to 9, characterised in that a sectional line (2) has a length of at least 20 metres parallel to the longitudinal direction.
11. Fire-fighting device according to one of Claims 1 to 10, characterised in that at least three extinguishing fluid nozzles (10) are arranged in a sectional line (2), and/or that an extinguishing fluid nozzle (10) is an extinguishing spray nozzle or a sprinkler nozzle.
12. Fire-fighting device according to one of Claims 1 to 11, characterised in that the sectional lines (2) of a longitudinal section (A, B, C) are connected via at least two supply lines (14), respectively, to the main extinguishing fluid line (4) and that sectional lines (2) arranged on the opposite-lying ends of a transverse section are connected respectively to the main extinguishing fluid line via (4) one supply line (14) only.
13. Method for operating a fire-fighting device in tunnels, comprising:

    - localisation of a fire in one of at least two transverse sections (a, b, c) subdividing a longitudinal section (A, B, C) of the tunnel,

    - connection of a limited selection of sectional lines (2) allocated in each case to a transverse section (a, b, c) to a main extinguishing fluid line (4) depending on the localised fire.
14. Method according to Claim 13, characterised in that at least the sectional lines (2) which are allocated to the transverse section (a, b, c) in which the fire has been localised and the sectional lines (2) allocated to the transverse sections (a, b, c) immediately adjacent to this transverse section are connected to the main extinguishing fluid line (4).
15. Method according to Claim 13 or 14, characterised in that N-1 out of a total number of N sectional lines are connected to the main extinguishing fluid line when a fire has been localised.

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