Fire extinguishing mist projector, fire extinguishing mist projector device and method for spraying fire extinguishing agent

Abstract

The invention relates to a fire extinguishing mist projector (1), comprising: a fire extinguishing agent connection (20) for connecting to a pressurized fire extinguishing agent supply; a housing (7) which can be pivoted about a vertical axis (Z) and a horizontal axis (Y) relative to the extinguishing agent connection (20) and which has a first housing opening (19) on the inlet side and a second housing opening (22) on the outlet side; a flow generator arranged in the housing (7), said flow generator being configured to provide an air flow (L) from the first housing opening (19) towards the second housing opening (22); and a fire extinguishing nozzle device (25) associated with the second housing opening (22), which is fluidically connected to the fire extinguishing agent connection (20) and is configured to output a fire extinguishing agent in such a way that the fire extinguishing agent is captured by the air flow (L). According to the invention, the extinguishing nozzle device (25) has at least one central tube (27) which is arranged in the housing (7) and is oriented in the projection direction (W), said central tube being fluidically connected by means of a feed line section (44) to a horizontally and vertically pivotable distribution device (37), said feed line section (44) being formed with a coordinated course of curvature.

Description

Technical Field

[0001] The present invention relates to a fire extinguishing mist projector, which comprises: a fire extinguishing agent connection part for connecting to a pressure-loaded fire extinguishing agent supply device; a shell that can be pivoted around a vertical axis and a horizontal axis relative to the fire extinguishing agent connection part, the shell having a first shell opening on the inlet side and a second shell opening on the outlet side; a flow generator arranged in the shell, the flow generator being configured to provide an air flow from the first shell opening toward the second shell opening; and a fire extinguishing nozzle device associated with the second shell opening, the fire extinguishing nozzle device being connected to the fire extinguishing agent connection part in a flow-conducting manner and being configured to output the fire extinguishing agent so that the fire extinguishing agent is captured by the air flow. Background Art

[0002] Fire extinguishing mist projectors of the type mentioned above are generally known. They are similar in their ability to pivot their extinguishing nozzle arrangement to fire monitors, which are for example mounted at fixed fire extinguishing installations or on fire extinguishing vehicles or police vehicles and can spray large quantities of extinguishing agent with precise directionality over sometimes large distances of significantly more than 50 meters.

[0003] The extinguishing mist projector is configured to atomize at least a portion of the extinguishing agent output by the extinguishing nozzle arrangement into an extinguishing mist, which improves the extinguishing effect. Compared to conventional extinguishing monitors, the extinguishing mist projector also has the additional feature of a flow generator, which captures the extinguishing agent output by the extinguishing nozzle arrangement by an air flow directed in the outlet direction and discharges it additionally in the projection direction of the housing, wherein the capture of the extinguishing agent by the air flow results in a higher projection range and, depending on the application, also results in a further atomization of the extinguishing agent into an extinguishing mist, which improves the extinguishing effect.

[0004] Extinguishing mist projectors of the type described at the outset are also marketed under the term "extinguishing turbines", although strictly speaking the drive of the flow generator is not always carried out according to the turbine principle, but is often carried out using a motor-driven, in particular electrically driven, flow generator, such as a fan.

[0005] For practical use, in extinguishing mist projectors of the type described at the outset, the achievable projection range of the sprayed extinguishing agent and the operating pressure of the pressurized extinguishing agent supply device required for this are important characteristic variables. In order to achieve a higher projection range of more than 50 meters, in particular more than 60 meters or 70 meters, operating pressures significantly higher than 12 bar, in particular higher than 14 bar or even 16 bar are required in known extinguishing mist projectors. Such operating pressures can usually be reliably provided at reasonable additional cost in fixed applications of extinguishing mist projectors, but this is not as great a challenge for mobile applications. For mobile applications and such high operating pressures, fixedly associated devices for the supply of extinguishing agent, such as permanently connected extinguishing agent pumps, are usually particularly large and cost-intensive, while non-fixedly associated devices for the supply of extinguishing agent, such as devices provided by fire trucks or in the form of portable pumps of the fire brigade, usually have design properties only as required by the original application.

[0006] The aim is to improve the projection range of the extinguishing agent, ie the maximum spraying, compared to the pressure of the pressurized extinguishing agent supply device which is required for this purpose. Summary of the invention

[0007] The object of the invention is therefore to improve the spraying properties of an extinguishing agent in general. In particular, the object is to improve an extinguishing agent applicator of the type described at the outset in such a way that the disadvantages existing in the prior art are overcome to the greatest extent possible. In particular, the object of the invention is to improve an extinguishing agent applicator in such a way that the minimum pressure required for operation of a pressurized extinguishing agent supply can be reduced without reducing the achievable range of the extinguishing agent, or a higher range can be achieved at the same pressure.

[0008] The invention achieves the object on which it is based by proposing an extinguishing mist projector having the features of claim 1. In particular, the invention proposes that the extinguishing nozzle device has at least one central tube arranged in a housing and oriented in the projection direction, which is connected in a fluid-conducting manner to a horizontally and vertically pivotable distribution device by means of an inlet line section, wherein the inlet line section is formed with a coordinated curvature course. According to the invention, a coordinated curvature course is understood to mean that the inlet line section has no directional changes that exceed a predetermined critical change angle and / or fall below a predetermined critical radius of curvature. It is therefore preferred that the curvature course either has no angular direction changes and curvatures, or that the curvature course has a plurality of angular direction changes, but the angular direction changes themselves do not exceed a change angle of 45°, preferably 30°, particularly preferably 15°, and / or has a plurality of curvatures, but the curvatures themselves each exceed a radius of curvature of 0.5 times their rated range, preferably 0.7 times their rated range, and particularly preferably not fall below 1.0 times their rated range.

[0009] In other words, a curvature course is understood to be harmonious when the curvature course has no change of direction or at any rate only a gentle change of direction within the above parameters. The change of direction preferably only occurs according to a curvature with the radius defined above. The radius can be constant along the curvature course, but it can also vary incrementally or decrementally.

[0010] Thus, the feed line section can be designed completely straight. The feed line section can be formed completely from angled or curved sections. Furthermore, the feed line section can also be formed from straight sections and angled or curved sections, as long as the angles or curvatures are within the above-mentioned parameter ranges.

[0011] The coordinated curvature course of the feed line section ensures that the extinguishing agent can flow better over the entire path between the distribution device and the central pipe, and pressure losses due to sudden deflections, which would otherwise manifest themselves as a drop in dynamic pressure, can be avoided. An example from the prior art that leads to an uncoordinated course of the feed line section is, for example, a T-shaped connector.

[0012] The inventors have found that by eliminating this disruptive geometry, an unexpectedly positive influence on the spraying efficiency of the extinguishing mist projector can be achieved. The pressure losses that are necessarily caused by the conveying of extinguishing agent from the extinguishing agent connection to the central pipe are surprisingly greatly minimized when the curvature course of the supply line sections is coordinated.

[0013] In an advantageous development of the invention, the supply line section is formed by a straight pipe section and / or an arcuately bent pipe section. In other words, the supply line section consists only of straight or arcuately bent pipe sections, which is a structurally advantageously flat and manufacturable implementation possibility for a coordinated curvature course.

[0014] According to the invention, the term "tube" is to be understood as a pipeline with a substantially cylindrical internal cross-section, which is preferably metallic, but can also be made of non-metallic material, such as plastic, composite material or a material mixture of different materials, to match the predetermined pressure range.

[0015] In another preferred embodiment, the inlet line section is arranged inside the housing. It has been shown that the arrangement of the inlet line section inside the housing of the extinguishing mist projector results in significantly less impairment of the discharge of the extinguishing agent from the extinguishing mist projector than would be expected, despite the fact that the inlet line section necessarily impairs the free cross-section through which the air flow generated by the flow generator is conveyed. This embodiment thus enables a significant shortening of the total length of the inlet line section from the distribution device to the central tube and thus a reduction in friction losses. As a result, any impairment of the air flow in the housing that can be detected by measurement technology, if any, is only affected to a very small extent.

[0016] In another preferred embodiment, the supply line section has a first internal line cross section at its inlet-side end and a second internal line cross section at its outlet-side end, the second internal line cross section being greater than or equal to the first internal line cross section.

[0017] Between the two ends, the feed line section preferably has a cross-sectional profile that is always greater than or equal to the first inner line cross section. In other words, the feed line section is preferably designed without a cross-sectional constriction, so that the formation of flow resistances and eddies due to a possible cross-sectional profile can be largely avoided. This also surprisingly has a large positive effect on reducing the pressure losses in the transfer path between the extinguishing medium connection and the central tube.

[0018] It has been found that the spraying efficiency of the extinguishing mist projector is not impaired overall if there is a local expansion of the internal cross section in the feed line section, which of course also necessarily leads to a constriction of the cross section at its local ends. The advantageous pressure course according to the invention is ensured if the outlet cross section of the feed line section is equal to or greater than the inlet cross section and is not smaller than the inlet cross section at any point.

[0019] In another preferred embodiment, the inlet line section has two pipe sections or pipe section arrangements extending in parallel in a fluidic manner on the inlet side, which are connected to the distribution device and converge into each other in an arc-shaped manner and in a common direction, in particular in a projection direction, on the outlet side. It has been shown that the division of the extinguishing agent flow in the distribution device into two partial flows associated with the convergent flow into each other defined above at the central pipe is a very effective fluid guidance for the application case. The division of the fluid flow in the distribution device is advantageous on the one hand for the mechanical design of the distribution device and on the other hand for the mechanical design of the inlet line section, because the support of the central pipe and the inlet line section is simplified in terms of structure. By converging into each other, the two partial flows of the extinguishing agent are guided into each other in a flow-favorable manner and mutual collisions of the partial flows are largely avoided. As a result, the extinguishing agent flow in the inlet line is less prone to eddying than the central pipe and cavitation is minimized or preferably avoided. The pressure fluctuations, if any, are then significantly less pronounced and thus also significantly less pressure losses are pronounced. Furthermore, the above-defined division of the supply line segment into a plurality of parallel pipe segments or pipe segment arrangements does not have the negative influence on the projection performance as a whole that might be expected at first glance, even though the described division of the supply line segment into pipe segments is also arranged in the housing and thus in the air flow generated by the flow generator.

[0020] In another preferred embodiment, two pipe sections or pipe section arrangements of the feed line section that run fluidically parallel have the same line length. More preferably, the pipe sections or pipe section arrangements are designed to be identical in shape and particularly preferably designed to be symmetrical to one another. The symmetry preferably exists in a plane extending in the projection direction, in particular a vertical plane.

[0021] In another preferred embodiment, the inlet line section preferably has a shutoff mechanism on the outlet side, which is configured to move back and forth between a blocking position and a release position, wherein the shutoff mechanism closes the inlet line section in a fluid-tight manner in the blocking position and releases the inlet line section in the release position. The shutoff mechanism has a flow cross section in the release position, which is equal to or greater than the first internal line cross section of the inlet line section. Preferably, the shutoff mechanism is designed as a ball valve. As a result, compared to other shutoff mechanisms, in particular to film valves, it is possible to block and release the fluid flow through the central tube without causing a contraction of the internal line cross section of the inlet line section. Other valves usually produce a contraction of 10% or more, usually even 30% or more, relative to the line cross section upstream and downstream of the valve even in the completely open position, so that by using the shutoff mechanism described above, in particular the ball valve, a further contribution to minimizing the pressure loss is achieved.

[0022] Furthermore, the shut-off member designed as a ball valve takes up less free cross section in the housing and accordingly only slightly impairs the air flow generated by the flow generator.

[0023] In another preferred embodiment, the shut-off mechanism is preferably controlled in a fluid technology manner by means of a dedicated fluid circuit. The dedicated fluid circuit is preferably a hydraulic control circuit or a pneumatic control circuit. If a hydraulic fluid circuit is involved, it should be understood here as an independent fluid circuit that is independent of the fire extinguishing agent. Therefore, for example, it is known from the prior art to use water-hydraulic control in a shut-off mechanism configured as a diaphragm valve, wherein the control circuit is connected to the fire extinguishing agent connection portion loaded with pressure. Here, although a dedicated fluid circuit can be abandoned and the fire extinguishing agent flow is used to control the shut-off mechanism instead. However, the control pressure and thus the correct function of the shut-off mechanism are always related to the fire extinguishing agent supply device and the pressure required for this. Conversely, the fire extinguishing agent supply must also always be delivered at such a high pressure that the shut-off mechanism can be controlled thereby. By controlling the shut-off mechanism independently of the pressure in the fire extinguishing agent flow, not only the operating performance of the fire extinguishing projector in terms of fire extinguishing agent delivery is improved, but also the control of the shut-off mechanism is improved, because the two units can be controlled by means of the ideal control pressure for each of them. In addition, this also reduces the error-proneness of the entire system.

[0024] In another preferred embodiment, the central tube is associated with a connection for coupling a first extinguishing nozzle on the outlet side. In a first preferred variant, a radiation tube is provided as the extinguishing nozzle. The radiation tube can be, for example, a hollow radiation tube or a combined radiation tube, which has a regulating device, which is configured to switch the projection characteristics of the radiation tube back and forth between a first end position optimized for a maximum projection range and a second end position configured for a maximum spray distribution of the extinguishing agent. When a foam additive is used in the extinguishing agent, extinguishing foam can also be formed in the intermediate position and the end position. Preferably, the setting device is provided with an interface for external control, wherein the interface can be, for example, an electrical interface for remote transmission by wire or wirelessly.

[0025] In other words, the first extinguishing nozzle therefore has a setting mechanism for adjusting the spray image between a focused first final position and an expanded second final position, wherein the setting mechanism is preferably controlled pneumatically, hydraulically or electrically. If the extinguishing mist projector should reach a particularly high projection range through the central tube, or if the extinguishing agent should be projected onto the object with particularly focused kinetic energy, then the focused final position is applied, for example. If the area should be protected from the spread of fire by means of a spray image that is as diffuse as possible or foam should be formed, then the expanded final position is applied, for example. Therefore, the expanded final position can also be referred to as a locking position or a foam position. In a preferred embodiment, the setting between the final positions is performed steplessly, wherein preferably, the setting mechanism is effectively connected to a programming logic that can be controlled from the outside, wherein the programming logic is configured to control the setting mechanism as a function of the obtained adjustment instruction for occupying a position representative of the adjustment instruction. Foam can also be formed in the position to a certain extent.

[0026] In another preferred embodiment, the fire extinguishing nozzle arrangement has a nozzle ring, which extends circumferentially, preferably on the inner side, along the nozzle opening, wherein the nozzle ring has a plurality of, preferably third, fire extinguishing nozzles arranged along the circumference of the nozzle ring, which are configured for generating and discharging an extinguishing agent spray in such a way that the extinguishing agent spray is captured by the generated air flow in the projection direction.

[0027] In a preferred embodiment, one, more or all of the extinguishing nozzles are implemented as conical nozzles. The conical nozzles can be hollow cone nozzles or full cone nozzles, wherein full cone nozzles are particularly preferably used. Preferably, full cone nozzles with a single outlet opening are used.

[0028] Preferably, at a pressure of 5 bar, the extinguishing nozzle has a flow rate at the nozzle of 13 l / min or more, more preferably 15 l / min or more, more preferably 18 l / min or more and particularly preferably 22 l / min or more.

[0029] Preferably, at a pressure of 10 bar, the extinguishing nozzle has a flow rate at the nozzle of 18 l / min or more, more preferably 21 l / min or more, more preferably 25 l / min or more and particularly preferably 32 l / min or more.

[0030] In the embodiment as a conical nozzle, the extinguishing nozzle preferably has a spray cone angle in the range of 60° to 120°, preferably a spray cone angle of 90°.

[0031] Preferably, the extinguishing agent output by the nozzles of the nozzle ring is directed at least partially toward the center axis of the nozzle opening, so that the capture of the spray by the generated air flow is simplified. The air flow generated by the flow generator ensures a larger projection range of the spray on the one hand and an additional further atomization on the other hand. Whenever a "second" extinguishing nozzle is mentioned above, it is to be understood that the extinguishing nozzle of the nozzle ring can be, on the one hand, a fundamentally independent extinguishing nozzle optimized for use at the nozzle ring, but on the other hand can also be identical to the second extinguishing nozzle described further above. The second extinguishing nozzle also ensures the formation of foam at the nozzle outlet when using a foam additive.

[0032] In a further preferred embodiment, the nozzle ring is connected to the distributor device in a fluid-conducting manner by means of a second supply line section, wherein according to the invention, the second supply line section—and the first supply line section—is formed with a coordinated curvature profile. Preferably, the supply line section is formed according to the same principle as already described above for the first supply line section, so that with regard to the above definition of the coordinated curvature profile and the extension of the second supply line section, reference is made to the above description of the first supply line section in order to avoid repetition.

[0033] The second supply line section is also preferably formed by a straight and / or arc-shaped curved pipe section.

[0034] Preferably, the second supply line section has a first internal line cross section at its inlet-side end, a second internal line cross section at its outlet-side end which is greater than or equal to the first internal line cross section, and a cross-sectional profile between the two ends which is always greater than or equal to the first internal line cross section.

[0035] In another preferred embodiment, the second input line section preferably has a shutoff mechanism on the outlet side, which is configured to move back and forth between a blocking position and a release position. In the blocking position, the shutoff mechanism closes the second input line section in a fluid-tight manner, and in the release position, the shutoff mechanism releases the second input line section, wherein in the release position, the shutoff mechanism also preferably has a flow cross section that is equal to or greater than the first internal line cross section of the input line section. The shutoff mechanism for the second input line section is also preferably configured as a ball valve and can also preferably be controlled externally, for example by means of a dedicated fluid circuit and / or by means of the same circuit as the shutoff mechanism of the first input line section. If the same fluid circuit is used, a corresponding pilot control line and / or pilot control valve is preferably provided.

[0036] In another preferred embodiment, the housing is effectively connected to one or more fluidically operated lifting cylinders for carrying out a movement about a horizontal axis, wherein the one or more lifting cylinders are configured to pivot the housing back and forth between an upwardly inclined final position and a downwardly inclined final position, wherein the lifting cylinders are preferably oriented such that they move further in the upwardly inclined final position than in the downwardly inclined final position, in particular move completely in the upwardly inclined final position and move completely out in the downwardly inclined final position.

[0037] The invention is described above with reference to the fire extinguishing mist projector of the first aspect. In a second aspect, the invention also relates to a mobile fire extinguishing mist projector device, the mobile fire extinguishing mist projector device having: a transport frame, in particular a lowering frame or a rolling frame, the transport frame having a fastening device for temporarily arranging the transport frame on the loading surface of a vehicle for transport purposes; and an extinguishing mist projector fastened to the transport frame, wherein the extinguishing mist projector is designed according to one of the preferred embodiments described above.

[0038] Mobile extinguishing mist projector devices are already known from the prior art, which, for example, propose extinguishing mist projectors of the type described at the outset on trailers. However, arranging the extinguishing mist projector on a transport frame greatly expands the possible fields of application and in particular the transport possibilities, since the transport frame can be flexibly assembled and can be used for different transport vehicles, which goes far beyond the use of a simple trailer. Therefore, the transport frame is preferably designed to the specifications of a 20-foot or 40-foot sea container and / or is prepared for accommodation on a cargo vehicle. The mobile extinguishing mist projector device is preferably designed as a lowering frame that can be lifted by a crane and therefore has one or more hook receptacles for being grasped by a crane sling. Alternatively, the mobile extinguishing mist projector device is preferably designed with a transport frame of a rolling container system, which transport frame also preferably has a hook receptacle for temporary accommodation on the loading surface of an aerodynamic vehicle.

[0039] In a preferred further embodiment, the mobile extinguishing mist projector device has one, more or all of the following designs:

[0040] a generator for generating electrical energy is mounted on the transport frame and is operatively connected to the extinguishing mist projector for supplying energy to the extinguishing mist projector, in particular to the flow generator;

[0041] - a fire extinguishing agent reservoir is mounted on the transport frame, wherein the fire extinguishing agent reservoir is preferably associated with one or more connections for introducing the fire extinguishing agent into the reservoir, preferably also laterally on both sides with respect to the longitudinal axis of the transport frame;

[0042] a pump device is mounted on the transport frame, which is connected on the inlet side to the extinguishing agent reservoir and on the outlet side to the extinguishing agent connection of the extinguishing mist projector and is configured to supply the extinguishing mist projector with pressurized extinguishing agent;

[0043] one or more connections are provided on the transport frame, preferably on both sides laterally with respect to the longitudinal axis of the transport frame, for conveying pressurized extinguishing agent from an externally connectable pump device to the extinguishing mist projectors;

[0044] A dirt collecting device is arranged on the transport frame, preferably upstream of the pump device, which dirt collecting device is connected in a fluid-conducting manner to an extinguishing agent connection of the extinguishing mist projector and is provided for separating dirt particles from the extinguishing agent.

[0045] In the above the invention is described with reference to the extinguishing mist projector itself. In another aspect the invention relates to a method for spraying an extinguishing agent, in particular for fire extinguishing and / or cooling purposes.

[0046] The invention achieves the object described at the outset of improved performance when spraying extinguishing agent in a fire extinguishing nozzle arrangement having a central tube and extinguishing nozzles associated with the central tube in that the method comprises the following steps:

[0047] A pressurized extinguishing agent is provided, the pressurized extinguishing agent is conveyed to an extinguishing nozzle, and the pressurized extinguishing agent is sprayed from the extinguishing nozzle, wherein the conveying step enables the pressurized extinguishing agent to be guided through a supply line section arranged upstream adjacent to the central pipe, which supply line section is formed with a coordinated curvature course.

[0048] To carry out the method, in a preferred embodiment, an extinguishing mist projector with a feed line section having the features of the preferred embodiments described above is used. In particular, an extinguishing mist projector or an extinguishing mist projector device according to one of the embodiments described above is used.

[0049] The method according to the invention utilizes the same advantages as the extinguishing mist projector and the extinguishing mist projector device according to the invention. Preferred embodiments of the extinguishing mist projector and the extinguishing mist projector device are at the same time preferred embodiments of the method and vice versa, so that in order to avoid repetitions, reference is made to the embodiments above in this regard. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The present invention is described in detail below according to preferred embodiments with reference to the accompanying drawings. It is shown here:

[0051] Figures 1 to 3Showing different side views of an extinguishing mist projector according to a preferred embodiment,

[0052] Figure 4 , Figure 5 Shown integrated in Figures 1 to 3 Different side views of the flow guiding device in the extinguishing mist projector,

[0053] Figures 6a to 6c Show according to Figures 4 to 5 Different spatial views of a part of a flow guiding device,

[0054] Figure 7 Shown for use according to Figure 4 , Figure 5 Hydraulic flow chart of the fluid guiding device,

[0055] Figure 8 A schematic spatial view of a mobile extinguishing mist projector device with an extinguishing mist projector according to a preferred embodiment is shown,

[0056] Fig. 9 Show according to Figures 1 to 8 A tabular assessment of the operation of the fire extinguishing fog projectors; and

[0057] Fig.10 , Fig.11 Show according to Fig. 9 A graphical representation of a table. DETAILED DESCRIPTION

[0058] exist Figure 1 , a fire extinguishing mist projector 1 according to a preferred embodiment of the invention is shown. The fire extinguishing mist projector 1 has a supporting structure 3 with a plurality of laterally protruding supporting feet 5. A housing base 4 is arranged on the supporting structure 3. The housing base 4 is configured for pivoting around a vertical axis Z at an angle α. Preferably, the value α is in the range of 180° to +180° starting from the so-called neutral position of the 0° orientation, so that a semicircular pivoting on both sides is possible and the entire surroundings of the fire extinguishing mist projector can be covered. The drive for the pivoting around the vertical axis Z is preferably realized by means of a hydraulic drive with a swivel.

[0059] Above the housing base 4, the extinguishing mist projector 1 has a support structure 6, which is supported on the housing base 4 and is configured to pivot about a horizontal axis Y within an angle range β, wherein the angle range β preferably encompasses an angle range of 45° or more, preferably 60° or more. Particularly preferably, the support structure 6 can be pivoted from a horizontal position in a first direction (downward direction) by 15° or more, and in an opposite second direction (upward direction) by 30° or more, preferably 40° or more.

[0060] The housing base 4 is preferably rotatably mounted on the support structure 3 by means of a rotational connection 9 .

[0061] The support structure 6 is preferably also mounted on the housing base 4 by means of a rotational connection 11 .

[0062] The support structure 3 has a pair of forklift recesses 13 on at least one side of the extinguishing mist projector 1 , which enable the extinguishing mist projector to be lifted and transported.

[0063] In order to pivot the support structure 6 relative to the housing base 4 , the extinguishing mist projection device 1 has one or more lifting cylinders 15 which are operatively connected to a suspension 17 of the support structure 6 .

[0064] The extinguishing mist projector 1 has a housing 7 for spraying extinguishing agent, which is fastened to a supporting structure. The housing 7 has a first housing opening 19 arranged at the rear side and a second housing opening 22 arranged opposite, at the front side. At the first housing opening 19 there is a protective grid 21. Also in the region of the first housing opening 19, the extinguishing mist projector 1 has a flow generator 23, see in particular Figure 2 , Figure 3 The flow generator 23 is configured to draw air from the first housing opening 19 and blow it out of the housing 7 towards the second housing opening 22 and thereby provide an air flow L. In other words, the first housing opening 19 is an air inlet opening and the second housing opening 22 is an air outlet opening. However, not only air is blown out of the second housing opening 22. An extinguishing nozzle device 25 is arranged in the region of the second housing opening 22, which is configured to output an extinguishing agent so that the extinguishing agent is captured by the air flow L.

[0065] The extinguishing nozzle arrangement 25 has a central tube 27 which is arranged inside the housing 7, preferably centrally in the flow channel for the air flow L. The central tube 27 is oriented in the projection direction W and is configured to discharge the extinguishing agent in the projection direction W. After leaving the central tube 27, the extinguishing agent is discharged from the second housing opening 23 and discharged on a projection path by the extinguishing agent projector 1, wherein the extinguishing agent is caught by the air flow L after leaving the central tube 27.

[0066] In addition, the extinguishing nozzle arrangement 25 has a nozzle ring 29 which is additionally configured to discharge a finely sprayed extinguishing agent which is likewise caught by the air flow L and discharged in the projection direction W as an extinguishing mist N, see Figure 2 .

[0067] The extinguishing agent is delivered to the extinguishing nozzle device via Figure 2 The extinguishing agent connection 20 shown in FIG. 1 is carried out via a flow path 31, see Figure 2Leading to the central tube 27 and the nozzle ring 29 .

[0068] As especially in Figure 3 As can be clearly seen in FIG. 7 , the flow generator 23 has a plurality of rotor blades 33 which are configured to generate an air flow L within the housing 7 and to catch and accelerate the extinguishing agent separated from the central tube 27 and the nozzle ring 29 .

[0069] Preferably, one or more lighting devices 35 , for example LED radiators, are arranged outside the housing 7 of the extinguishing mist projector 1 in order to be able to illuminate the extinguishing area in the projection direction W.

[0070] exist Figure 4 and Figure 5 The flow guiding device is shown together with other details.

[0071] Starting from the extinguishing agent connection 20, the pressurized extinguishing agent first passes in the flow path 31 via a plurality of pipe sections with a first nominal width D1 into the horizontally and vertically pivotable distribution device 37. The distribution device 37 has a vertical first section 39 with a swivel lead-through that can be pivoted about a vertical axis Z and is functionally associated with the interface between the supporting structure 3 and the housing base 4, and a horizontal second section 41 with swivel lead-throughs 43a, 43b that can be pivoted about a horizontal axis and is associated with the interface between the supporting structure 6 and the housing base 4. The distribution sections 39, 41 of the distribution device 37 preferably also have the same first nominal width D1 as the upstream part of the flow path 31.

[0072] The first nominal width D1 is preferably in the range of DN100 or more, more preferably in the range of DN125 or more. In the region of the rotary lead-through 43, a diameter transition from the first nominal width D1 to a smaller second nominal width D2 is preferably formed. The second nominal width D2 is preferably in the range below DN100, preferably in the range of DN80 or less.

[0073] The first supply line section 44 extends from the distribution device 37 to the central tube 27. The supply line section 44 is also shown in detail at Figure 6a , Figure 6b and Figure 6c4. The first supply line section 44 is formed by a series of straight pipe sections 45a, 45b and arcuately curved pipe sections 46a, 46b and 47a, 47b arranged one after another, which guide the extinguishing agent from the distribution device 37 to the central pipe 27 with a coordinated curvature course. Preferably, a first shut-off member 49 is arranged upstream of the central pipe 27, in particular adjacent to the central pipe, and the first shut-off member is particularly preferably designed as a ball valve.

[0074] The pipe sections in the first supply line section 44 have at least the second nominal width D2 throughout, both in the straight pipe sections 45a, 45b and in the arcuately curved pipe sections 46a, 46b, 447a, 47b. The shut-off member 49 preferably also has a throughflow nominal width D2 in its open position. This ensures that in the entire first supply line section 44, from the inlet-side end at the distributor device 37 to the outlet-side end at the central pipe 27, at least an internal line cross section with the nominal width D2 is always provided.

[0075] As from Figure 4 , Figure 5 and Figure 6a-6c As can be seen intuitively in FIG, in the inlet line section 44, on the outlet side, upstream adjacent to the shut-off member 49, two curved pipe sections 47a, 47b are symmetrically designed. Preferably, the entire inlet line section is formed by two symmetrical section courses or section arrangements 45, 46, 47 (a and b), which are each connected to a distribution device 37, in particular a horizontal distribution section 41. The outlet-side pipe sections 47a, 47b are located in a common plane E and converge into each other in an arc shape and in a common direction, i.e. preferably in the projection direction W.

[0076] In this way, the partial flows in the first feed line section 44 are guided tangentially to one another. The division into two fluid flows ensures a better distribution of forces in the mechanical construction of the flow guiding device of the flow path 31. By guiding the fluid in two partial flows from the distribution line 37 toward the central tube 27, a relatively large free cross section remains in the housing 7 in order to ensure a satisfactory flow of the air flow L.

[0077] In the neutral position of the housing, plane E is preferably oriented horizontally.

[0078] The pipe sections 45a, 45b exiting the distributor device 37 are located in a common plane C. The curved pipe sections 46a, 46b are oriented with their inlet-side ends 48.1 toward the plane C and with their outlet-side ends 48.2 toward the plane E. The two planes C, E of the supply line section 44 are arranged at an angle γ to one another. The straight line located in the intersection of the two planes C, E is preferably oriented orthogonally to the projection direction W and / or is a normal to the plane F and / or is oriented parallel to the axis Y.

[0079] The segment arrangements 45 - 47 of the supply line section 44 are preferably mirror-symmetrical with respect to a symmetry plane F which is orthogonal to the plane E. The axis characterizing the projection direction W lies in the intersection of the planes E and F, in particular.

[0080] exist Figure 4 and Figure 5 In the embodiment of the embodiment, the first extinguishing nozzle 51 is connected to the central tube 27. The first extinguishing nozzle 51 is preferably configured as a multi-purpose radiation tube and can be manipulated from the outside to set the spraying pattern. The spraying pattern of the first extinguishing nozzle 51 can be set in the manner described between the first position with the maximum spray distribution effect and the second position with the maximum projection range effect, either in a stepped manner or in a stepless manner.

[0081] Therefore, depending on how the fire extinguishing nozzle 51 is set, the fire extinguishing agent can be output through its fire extinguishing nozzle opening 52 either with maximum projection range, or with maximum spray distribution effect, that is, the most diffuse fire extinguishing agent discharge performance, or a mixture of these two effects can be output in an intermediate position.

[0082] The flow path 31 further comprises a second supply line section 55 which is connected to one of the two rotating leadthroughs 43 and is connected to the second supply line section 55. Figure 4 , and extends continuously from the distributor 37 to the nozzle ring 29. The second supply line section 55 is also formed with a coordinated curvature course and is composed of straight and arc-shaped curved pipe sections. It is also preferred that the pipe section of the second supply line section 55 also has at least the second nominal width D2 throughout. The coordinated course of the two supply line sections 44, 55 in terms of diameter and curvature achieves a particularly advantageous extinguishing agent transport with low pressure losses and good discharge performance.

[0083] On the outlet side, a second shut-off member 57 is provided on the second supply line section 55, which second shut-off member preferably also has a nominal channel width D2. Figure 4 and Figure 5In the present embodiment of the invention, the second extinguishing nozzle 53 is designed as a membrane valve, but it should be understood that, as an alternative to using a membrane valve at the location, a ball valve can and should be used, just as in the first supply line section 44. The second supply line section 55 supplies the nozzle ring 29 with extinguishing fluid, and the extinguishing fluid is discharged in the nozzle ring through a plurality of second extinguishing nozzles 53 preferably evenly distributed along the circumference of the nozzle ring 29. The second extinguishing nozzle 53 is preferably designed as a spray nozzle of the type described in the general part, wherein, in order to avoid repetition, reference is made to the above embodiments.

[0084] If the projection direction is mentioned above and below, this is understood to be the orientation of the extinguishing nozzle arrangement 25. Of course, under the influence of gravity and wind, the extinguishing agent does not spread perfectly linearly after leaving the respective extinguishing nozzle 51, 53, but follows a trajectory that falls towards the ground due to gravity and can additionally be influenced horizontally and / or vertically by the wind.

[0085] If also from Figure 7 As can be seen intuitively in FIG, both the first shut-off mechanism 49 and the second shut-off mechanism 57 can be controlled from the outside. Preferably, one or both of the shut-off mechanisms 49, 57 are designed as fluid-controlled valves, particularly preferably as hydraulic valves. The first shut-off mechanism 49 is connected to a control circuit by means of a control line 61, and the second shut-off mechanism 57 is connected to the same or a separate fluid circuit for control by means of a second control line 59. The fluid circuit for the control lines 59, 61 is particularly preferably separate from and independent of the pressurized extinguishing agent, so that on the one hand it can be controlled by means of a control pressure that is ideally coordinated for the shut-off mechanisms 49, 57, which can be significantly different from the fluid pressure of the extinguishing agent, and on the other hand, so that contamination of the flow path 31 is excluded. As an alternative to using a hydraulic system as a control medium, for example, a practical or electrical system, such as an electropneumatic system, is also conceivable.

[0086] exist Figures 1 to 7 After separately showing the external view and the internal view of the extinguishing mist projector 1, Figure 8 A development of the exemplary embodiment towards a mobile extinguishing mist projector device is shown, which allows the extinguishing mist projector to be transported to different locations of use. For this purpose, the mobile extinguishing mist projector device 100 has a transport frame 101 which is designed in the manner of a rolling container and extends from a first side 102 (rear side) to a second side 104 (front side), wherein the description of the rear side and the front side each relate to the transport direction when the vehicle with the container is moving.

[0087] The extinguishing mist projector 1 is mounted on the transport frame 101 in the region of the rear side 102 .

[0088] At the front side 104 of the transport frame 101, a hook receptacle 111 for receiving and removing the extinguishing mist projector device 100 is provided on or from the transport vehicle. The transport frame 101 preferably has an end wall cladding 113. The frame structure is configured as a flatbed stand.

[0089] The mobile extinguishing mist projector device 100 has an extinguishing agent reservoir 115, which has a manhole 117 on the upper side and has a plurality of connections 119 on the third (right) frame side 108 (again with reference to the direction of travel) for introducing extinguishing agent into the extinguishing agent reservoir 115. Preferably, one or more connections 119 are also provided on the fourth frame side 106 (left in the direction of travel).

[0090] The mobile extinguishing mist projector device 100 also has a generator 121, preferably a diesel generator, for generating electrical energy. The electrical power required for maintaining operation is supplied to other components, in particular the extinguishing mist projector 1, by means of the generator 121. The extinguishing agent reservoir 115 preferably has a capacity of 5000 liters or more, in particular 6000 liters or more.

[0091] The length of the transport frame from the rear side 102 to the front side 104 is preferably in the range of 6 meters or more, preferably in the range between 6 meters and 6.40 meters. The width from the left frame side 106 to the right frame side 108 is preferably in the range of 2.20 meters to 2.80 meters, particularly preferably 2.50 meters, and the height of the transport frame including all configurations is preferably in the range of 2 meters or less.

[0092] A control cabinet 123 is arranged adjacent to the generator 121 , by means of which electrical components and the extinguishing mist projector can be connected in a signal-conducting manner and the extinguishing mist projector device can be actuated via said control cabinet.

[0093] The extinguishing mist projector device 100 has, on the two lateral frame sides 106, 108, preferably symmetrical rail systems 127a, 127b, each movable in the extension direction S, for reversibly and detachably mounting a pump 125a, for example a so-called peak-load, i.e. portable, extinguishing agent pump as used by fire brigades. The pumps 125a, 125b are used to supply the extinguishing mist projector 1 with pressurized extinguishing agent from an extinguishing agent reservoir 115. Alternatively or additionally, one or more non-return valves 131 and / or a dirt collection device 133 are provided on the transport frame 111 as part of a pipe system 129 for separating solids from the extinguishing agent.

[0094] Furthermore, the pipe system 129 preferably has one or more extinguishing agent connections 135a, 135b on both sides of the transport frame 101. The extinguishing agent connections 135a, 135b are preferably configured for connection to an external pressure line and / or to an external pump.

[0095] The pipe system 129 connects the pump or extinguishing agent connection 125 , 135 to the extinguishing mist projector 1 and in particular to its extinguishing agent connection 20 (see the above figures).

[0096] Comparative tests were performed for checking the performance capabilities of the fire extinguishing mist projector of the embodiment described above. The fire extinguishing mist projector according to the above figures was compared with a fire extinguishing turbine in the prior art.

[0097] The extinguishing turbine of the prior art corresponds essentially to the device of the above-mentioned figures in terms of its external dimensions. The flow guidance from the extinguishing agent connection to the distribution device is largely identical. However, the feed line between the distribution device and the central pipe runs through feed line sections with uncoordinated curvatures and uncoordinated cross sections. In the device of the prior art, the extinguishing agent is conveyed through a plurality of 90° angles, inner constrictions and a plurality of curved pipe sections.

[0098] Water was used as the extinguishing medium in the test. The apparatus was tilted upwards by 25° from the horizontal about the axis Y with its projection direction W.

[0099] The nozzle ring is blocked in both devices, and identical extinguishing nozzles are arranged on the corresponding central pipes, which are each placed in the full-radiation end position.

[0100] A test configuration is used, as is also generally known for testing the discharge performance of a sprinkler system. A collecting container for the discharged extinguishing agent is placed at a predetermined distance from the device, and the pressure of the pump used is controlled so that the extinguishing agent discharge from the central pipe 27 (when the first extinguishing nozzle 51 is set in the focused end position) hits the collecting container centrally. For this purpose, the extinguishing agent pressure applied to the extinguishing agent connection, i.e. at the fluid inlet of the device, is recorded. The distance at which complete water wetting is still achieved is recorded as the effective range.

[0101] Fig. 9 The table of records two measurement series. In the first two columns, the effective range R in meters and the extinguishing agent discharge in liters per minute achieved when spraying extinguishing agent are plotted, respectively, with respect to the pressure p at the extinguishing fluid connection (reference numeral 20 in the exemplary embodiment) of the extinguishing turbine according to the prior art. Fig. 9 The two lower columns of the table reproduce the Figures 1 to 8 The R and A of the fire extinguishing mist projector according to the pressure p.

[0102] With the devices of the prior art, measurements are only possible from pressures above 7 bar, since the shut-off mechanism installed there does not switch below this pressure. The descriptions of the prior art in the rightmost column were not measured, but were learned from the descriptions of the manufacturers of the devices of the prior art and were assumed to be correct.

[0103] Fig.10 The achieved effective range R is visualized as a function of the pressure (p). Fig.11 Visualize the amount A of extinguishing agent discharged as a function of the pressure p. Fig. 9 The measurement point at Fig.10 and Fig.11 In each case a linear trend line emerges which shows a linear behavior in the measured operating range to a good approximation.

[0104] Valid range function R i (p) = A i p+B i Approximately

[0105] (1) R1(p) = S1 p + T1; for the embodiment of the present invention, where S1 = 8.0 (m / bar), and T1 = +2.5 m, and

[0106] (2) R2(p) = S2p + T2; for the prior art apparatus, S2 = 9.6 (m / bar), and T2 = -27.1 m.

[0107] The expulsion function is approximated as:

[0108] (3) A1(p) = B1 p + G1; for the embodiment of the present invention; wherein B1 = 561 (l / (bar min)), and G1 = -1417 (l / min),

[0109] (4) A2(p) = B2 p + G2; for the prior art apparatus, B2 = 1302.9 (l / (bar min)), and G2 = -288.6 (l / min).

[0110] Fig.10 and Fig.11 It is clearly shown that the performance of the extinguishing mist projectors in the measured range is consistently higher than that of the prior art both in terms of the achievable effective range and in terms of the extinguishing agent discharged.

[0111] from Fig.10 It can be seen that, compared with the prior art, the extinguishing agent can be sprayed at a lower pressure with the extinguishing mist projector 1. It can also be seen that, with the extinguishing mist projector according to the invention, a significantly larger effective range can be achieved at the same pressure.

[0112] It has been found that for the same discharge volume, a lower pressure is required according to the invention than in the prior art. A higher maximum extinguishing agent discharge is achieved than in the prior art, and this is achieved at a significantly lower operating pressure.

[0113] Reference numerals list

[0114] 1 Fire Mist Projector

[0115] 3 Load-bearing structure

[0116] 4 Shell base

[0117] 5 Support feet

[0118] 6 Support structure

[0119] 7 Housing

[0120] 9, 11 Rotating connection

[0121] 13 Forklift recess

[0122] 15 Lifting cylinder

[0123] 17 Suspension

[0124] 19 First shell opening

[0125] 20 Fire extinguishing agent connection

[0126] 21 Protection grid

[0127] 22 Second shell opening

[0128] 23 Flow generator

[0129] 25 Fire extinguishing nozzle device

[0130] 27 Central tube

[0131] 29 Nozzle ring

[0132] 31 Flow Path

[0133] 33 Rotor blades

[0134] 35 Lighting mechanism

[0135] 37 Distribution device

[0136] 39 vertical section

[0137] 41 Horizontal section

[0138] 43 Horizontally pivotable rotary guide

[0139] 44 First inlet pipe section

[0140] 45a, b Straight pipe section

[0141] 46a, b Bent pipe section

[0142] 47a, b Bent pipe section

[0143] 48.1 Inlet side of pipe section 46

[0144] 48.1 Outlet side of pipe section 46

[0145] 49 First Cut-off Agency

[0146] 51 First fire extinguishing nozzle

[0147] 52 Nozzle opening of the first extinguishing nozzle

[0148] 53 Second fire extinguishing nozzle

[0149] 55 Second input pipeline section

[0150] 57 Second Cut-off Agency

[0151] 59 Control line of the second cut-off mechanism

[0152] 61 Control line of the first cut-off mechanism

[0153] 100 Mobile fire extinguishing fog projection device

[0154] 101 Transport Frame

[0155] 102 First side (rear)

[0156] 104 Second side (front)

[0157] 106 Fourth frame side (left)

[0158] 108 Third frame side (right)

[0159] 111 hook receiving portion

[0160] 113 End wall cladding

[0161] 115 Fire Extinguishing Agent Storage Tank

[0162] 117 Manhole

[0163] 119 Fire extinguisher reservoir connection

[0164] 121 Generator

[0165] 123 Control cabinet

[0166] 125a, 125b pumps

[0167] 127a, 127b Track system, pump

[0168] 129 pipe system

[0169] 131 Check valve

[0170] 133 Dirt collection device

[0171] 135a, 135b Fire extinguishing agent connection

[0172] A. Discharge of fire extinguishing agent

[0173] C, E, F planes

[0174] L Air flow

[0175] N Fire Extinguishing Mist

[0176] p Extinguishing agent pressure

[0177] R Effective range of fire extinguishing agent

[0178] S rail pull-out direction

[0179] W Projection direction

[0180] Y horizontal axis

[0181] Z vertical axis

[0182] D1 First rated width

[0183] D2 Second rated width

Claims

1. A fire extinguishing mist projector (1), comprising: an extinguishing agent connection (20) for connecting to a pressurized extinguishing agent supply, A housing (7) which is pivotable relative to the extinguishing agent connection (20) about a vertical axis (Z) and a horizontal axis (Y), the housing having a first housing opening (19) on the inlet side and a second housing opening (22) on the outlet side, a flow generator disposed in the housing (7), the flow generator being configured to provide an air flow (L) from the first housing opening (19) towards the second housing opening (22), and an extinguishing nozzle device (25) associated with the second housing opening (22), the extinguishing nozzle device being connected to the extinguishing agent connection (20) in a flow-conducting manner and being configured to discharge extinguishing agent so that the extinguishing agent is captured by the air flow (L), The extinguishing nozzle arrangement (25) has at least one central tube (27) arranged in the housing (7) and oriented in the projection direction (W), It is characterized in that The central tube (27) is connected in a fluid-conducting manner to a horizontally and vertically pivotable distribution device (37) by means of a supply line section (44), wherein the supply line section (44) is formed with a coordinated curvature profile.

2. The fire extinguishing mist projector (1) according to claim 1, It is characterized in that The supply line section (44) is formed by a straight pipe section (45a, b) and / or an arc-shaped curved pipe section (46a, b, 47a, b).

3. The fire extinguishing mist projector (1) according to claim 1 or 2, It is characterized in that The supply line section (44) is arranged in the housing (7).

4. An extinguishing mist projector (1) according to any one of the preceding claims, It is characterized in that The supply line section (44) has a first internal line cross section (D2) at its inlet-side end, a second internal line cross section (D2) greater than or equal to the first internal line cross section at its outlet-side end, and a cross-sectional profile between the two ends which is always greater than or equal to the first internal line cross section.

5. An extinguishing mist projector (1) according to any one of the preceding claims, It is characterized in that The supply line section (44) has two pipe sections or section arrangements on the inlet side, which are connected to the distributor device and which on the outlet side converge into each other in an arc-shaped manner and in a common direction, in particular in a projection direction (W). In this case, the pipe sections preferably have the same line length and are more preferably of identical shape, particularly preferably symmetrical.

6. An extinguishing mist projector (1) according to any one of the preceding claims, It is characterized in that The supply line section (44) preferably has a shut-off mechanism (49) on the outlet side, which is configured to move back and forth between a blocking position, in which the supply line section (44) is closed in a fluid-tight manner, and a release position, in which the supply line section is released, wherein the shut-off mechanism (49) has a flow cross section in the release position which is equal to or greater than a first internal line cross section of the supply line section.

7. An extinguishing mist projector (1) according to any one of the preceding claims, It is characterized in that The central tube (27) is associated on the outlet side with a connection for coupling to a first extinguishing nozzle (51). Preferably, the first extinguishing nozzle (51) has a setting mechanism for adjusting the spray pattern between a focused first end position and an expanded second end position, wherein the setting mechanism is preferably controlled pneumatically, hydraulically or electrically.

8. An extinguishing mist projector (1) according to any one of the preceding claims, It is characterized in that The extinguishing nozzle arrangement (25) comprises a nozzle ring (29) which extends circumferentially, preferably on the inside, along the second housing opening (22), wherein the nozzle ring (29) preferably comprises a plurality of, preferably second, extinguishing nozzles (53) arranged along the circumference of the nozzle ring (29), the extinguishing nozzles being configured to generate and output an extinguishing agent spray (N) such that the extinguishing agent spray (N) is captured by the generated air flow (L) in a projection direction (W).

9. The fire extinguishing mist projector (1) according to claim 8, It is characterized in that The nozzle ring (29) is directly connected to the distribution device (37) in a fluid-conducting manner by means of a second supply line section (55), wherein the second supply line section (55) is formed with a coordinated curvature profile.

10. The fire extinguishing mist projector (1) according to claim 8 or 9, It is characterized in that The second supply line section (55) is formed by a straight and / or arcuately bent pipe section (42, 44, 47a, b).

11. The extinguishing mist projector (1) according to any one of claims 8 to 10, It is characterized in that The second supply line section (55) has a first internal line cross section (D1) at its inlet-side end, a second internal line cross section (D1) greater than or equal to the first internal line cross section at its outlet-side end, and a cross-sectional variation between the two ends which is always greater than or equal to the first internal line cross section (D1).

12. The extinguishing mist projector (1) according to any one of claims 8 to 11, It is characterized in that The second supply line section (55) preferably has a shut-off mechanism (57) on the outlet side, which is configured to move back and forth between a blocking position and a release position, in which the second supply line section (55) is closed in a fluid-tight manner and in which the second supply line section is released, wherein the shut-off mechanism (57) has a flow cross section in the release position that is equal to or greater than a first internal line cross section of the supply line section.

13. The extinguishing mist projector (1) according to any one of the preceding claims, It is characterized in that The housing (7) is operatively connected to one or more fluidically operated lifting cylinders for effecting movement about the horizontal axis (Y), wherein the one or more lifting cylinders are configured to pivot the housing (7) back and forth between an upwardly tilted final position and a downwardly tilted final position, wherein preferably, the lifting cylinder (18) is oriented such that it moves further into the downwardly tilted final position than in the upwardly tilted final position, in particular moves completely into the downwardly tilted final position and moves completely out of the upwardly tilted final position.

14. A mobile fire extinguishing mist projector device (100), the mobile fire extinguishing mist projector device comprising: a transport frame (101), in particular a lowering frame or a rolling frame, and a fire extinguishing mist projector (1) fastened to the transport frame, The extinguishing mist projector (1) is constructed according to any one of the above claims.

15. A method for spraying a fire extinguishing agent from a fire extinguishing nozzle arrangement thereof, the fire extinguishing nozzle arrangement having a central pipe (27) and fire extinguishing nozzles associated with the central pipe, the method comprising the following steps: - provide pressurized extinguishing agent, - delivering the pressurized extinguishing agent to the extinguishing nozzles, and - spraying the pressurized extinguishing agent from the extinguishing nozzle, The step of conveying provides for the pressurized extinguishing agent to be guided through a supply line section arranged upstream adjacent to the central pipe, which supply line section is formed with a coordinated curvature course.

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