KR20230157510A - Fire extinguishing device and method of operation thereof - Google Patents

Abstract

The present invention relates to a fire extinguishing device having a support tube (2) and a casing tube (6) axially movable in the support tube (2), wherein a flow distributor assembly (27) is provided in the support tube (2) and a flow distributor assembly (27) is provided in the support tube (2). The flow distributor assembly 27, which includes a distributor cone 46, forms an outwardly directed annular orifice 45, and the casing tube 6 has front edges 53, 56, 57 at the top of the orifice 45. The fluid flow flowing into the flow distributor assembly 27 from the support tube 2 by moving to open and close it is divided into an annular flow and directed outward to the orifice 45, and is also used in a fire extinguishing method using a fire extinguishing device. It's about.

Description

Fire extinguishing device and method of operation thereof

The present invention relates to fire extinguishing devices and methods of operating the same.

Extinguishing devices differ in terms of function, extinguishing agent, extinguishing effect, application and many other characteristics. However, it can be said that basically in most applications water is used as a fire extinguishing agent. In any case, the function of the fire extinguishing device consists in bringing the water into the appropriate form to achieve the ideal fire extinguishing effect for each application. According to the fire triangle, extinguishing fires can be accomplished in three ways:

· lack of flammable materials

· lack of oxygen

· lack of reaction energy

As the main extinguishing agent, water basically exploits the cooling effect, i.e. the lack of reaction energy, due to its very high latent heat of vaporization. Therefore, in order to dissipate this enormous amount of energy, it is necessary to vaporize it as effectively as possible. Heat transfer between two materials depends on many factors, but the easiest and most effective heat transfer factor to modify is effective area. Therefore, care must be taken to maximize the effective area in any fire extinguishing method used to cool the burning material.

Accordingly, a fire extinguishing device or method may be considered particularly effective where the vaporization of water and the associated diffusion of vapors displace combustion air as a secondary fire extinguishing effect, leading to extremely rapid fire suppression.

To achieve this, a water mist must be created that is of sufficient fineness (droplet size) that the effective area of the water is large enough to be perfectly dispersed in the fire space so that heat transfer delays are no longer perceptible. Vaporization occurs in just a few seconds, causing the vapor to suddenly spread.

1L water = 1673 liters of water vapor

If water could vaporize approximately 100%, this diffusion would immediately produce several cubic meters of water vapor. Typical water volume for interior attac is 180 liters per minute. In this operating state, it is possible to introduce 3 liters per second into the fire space. Therefore, in the ideal case, about 5 m ³ of water vapor is generated per second. This sudden vaporization primarily disperses unevaporated water particles throughout the space, resulting in the fire space being uniformly wet with steam and wet steam.

So-called solid stream nozzles have been known for a long time from the prior art. As the name suggests, a rod-shaped jet nozzle creates a concentrated solid stream in the same shape as the nozzle, so that at the exit of the jet nozzle the vectors of fluid particles are concentrated and directed in the same direction. The effect of this is a long range, which provides the necessary safety distance from the fire source.

Unfortunately, the main disadvantage of concentrated streams is that the wetted area of the fire water achieves a minimum size. As a result, heat transfer is very low and it is almost impossible to use extinguishing water for vaporization because constraints prevent the necessary vaporization energy from being transferred from the fire source to the medium. The result of this is so-called water damage, which means that fire extinguishing water seeps into structures below the fire source, causing damage to these areas that are not actually affected by the fire. It is not uncommon for building damage from fire extinguishing water to exceed the actual fire damage.

For a long time, it was technically impossible for firefighters to approach the fire source in different ways and achieve extinguishing effects with different types of streams. Further developments in personal protective equipment, especially in combination with breathing apparatus, have allowed firefighters to get closer to the fire source.

At the time, the bar-draining nozzle technology was not suitable for this application, and the concentrated thrust of the stream was unfavorable for short-distance firefighting.

Therefore, the technology development sought to atomize the stream on the grounds that better cooling effects could be achieved with a larger cooling area.

This was implemented through a guide vane device integrated into a ball valve. The guide vanes create extremely powerful eddies in the flow, with the vanes extending almost at right angles to the meridian flow. This vortex creates a radial distribution from the center outward at the exit of the nozzle and distributes the extinguishing water in a cone shape.

This change greatly improved cooling performance and these types of jet nozzles are still used today.

A second, almost parallel development was the introduction of high-pressure jet nozzles. Conventional fire hoses use a pressure level of PN16; This standard is internationally recognized and is the same almost everywhere except for slight differences in hose diameter and connection technology.

High-pressure hoses, on the other hand, use pressure levels of PN40 and are implemented as dimensionally stable compressed fabric hoses, similar to hydraulic hoses. Preparation of the pressure level is implemented only by water-carrying fire-fighting vehicles equipped with integrated centrifugal pumps.

For this purpose, the water is located on the same shaft, which consists of a series connection of several pump wheels. It must be supplied from the main stage to the auxiliary stage. A further limitation on applicability is the special hose system; In implementation, the high-pressure hose is typically mounted on a hose reel permanently installed in the vehicle close to the high-pressure stage. In practical applications, this means that firefighting vehicles must be located close to the fire source; Typical hose line length is 60 - 90 meters. This design is not typically found in aerial rescue equipment such as turntable ladders or telescopic mast platforms.

However, high-pressure hoses have advantages in terms of fire extinguishing effectiveness. In general, it is known that very effective atomization of liquid means can be produced by high exit velocities. In this case, constructive sieves such as sprays are not provided; The division of the fluid takes place purely through the surrounding means of air. The relationship between air resistance and speed is also well known; This increases with the square of the flow velocity. If the exit velocity is twice as high, the air resistance increases four times.

Perhaps this relationship is not directly proportional to droplet size, but it is clear to those skilled in the art that high exit velocity is the key to effective atomization. Therefore, the air resistance must be less than the alternating force acting on the extinguishing jet. A fire jet is nothing more than a mass of water particles with their velocity vectors pointing in the same direction.

Therefore, when a randomly located biasing force is applied to a water particle, the direction of the velocity vector changes slightly. This causes the fluid particles to move away from each other due to the constant friction effect until the attraction between the droplets is broken. The droplet then follows a trajectory randomly determined by the turbulent flow. This effect produces atomization that increases as the trajectory continues, with little further effect once the kinetic energy is reduced to a critical value, which occurs after a certain length of flight. Therefore, a fire extinguishing jet based on this type of atomization requires a certain deployment length. This is part of the flight path required to establish atomization.

Therefore, with the greatly increased pressure energy, the high-pressure nozzle has a higher potential to effectively convert it into kinetic energy at the exit of the appropriate nozzle shape. Therefore, high-pressure rod water nozzles can take advantage of the above-mentioned effects and actually provide an efficient fire extinguishing technology.

This technology has been or is being replaced by low pressure hollow jet nozzles at PN16 pressure level. The reason is the significant shortcomings of the high pressure system as a whole.

· Expensive and complex pump design due to multi-stage centrifugal pump

· Limited coverage due to stiff hose lines

· Large friction losses due to high flow rates

· Jet angle not adjustable

· Limited water flow due to basic technical conditions

For this reason, hollow jet nozzles were developed, since an essential factor in atomization theory is the circumferential surface or circumference of the jet. Basically, each water particle placed around the circumference meets an air particle on the other side, creating friction. The relationship is therefore clear: the greater the number of frictional contacts, the more effectively good atomization can be achieved, especially at points as close as possible to the outlet.

Therefore, high pressure rod nozzles take advantage of the high exit velocity effect but do not utilize the largest possible jet circumference. The calculation example according to Table 1 shows that, using a constant outlet area and therefore a constant outlet velocity (continuity ratio without taking tube losses into account), much larger circumferences and circumferential areas can be produced by splitting into several nozzles. Calculation examples show aperture changes divided into finer aperture steps, starting with a 20mm aperture (standard for rod-shaped nozzles). It is clear that it is relatively easy to increase the circumferential contact points several times while maintaining a constant exit velocity (as seen without friction) by using a large number of small nozzles.

The solution to this problem is to split the jet into several smaller jets with the same overall cross-section. Examples of this are piercing nozzles, which are provided with holding holes to influence jet formation. The holes do not converge in a concentrated manner to form a jet, but are placed at a constant exit angle to achieve the best possible evolution of the fire space. However, if the holes are too small, inlet pipe losses have a negative effect.

According to the above considerations, an ideal fire extinguishing device should provide the following effects and functions:

· effective exit speed

· Divide outlet area into ideal number of outlets to achieve maximum jet circumference

· Form flexible jets by changing the impact angle of the outlet conduit

Known hollow jet nozzles already come close to these considerations. The hollow jet nozzle divides the jet at a set angle through an adjustable cone in the middle of the meridional flow. However, to form more than a simple annular region, the housing or cone is provided with additional flow-related features, often in the form of flow-dividing vanes. This converts the annular surface created by the overlap into circular sectors, increasing the circumferential area of the jet.

By adjusting the axis position of the cone, changes in the moment or speed of the jet can be controlled. Accordingly, the operator may change the spray angle of the jet.

This form of jet production is now almost universally used for stationary water cannons as well as portable jet nozzles and represents prior art.

However, implementing very complex coordination mechanisms is problematic and expensive. Implementing a steering mechanism within the meridional flow requires a number of built-in elements.

DE 20 2012 012 648 U1 discloses a segmented hollow jet nozzle, as a solution the jet is steered by an adjustable cone of the nozzle. The design is extremely complex and expensive.

EP 2 155 401 B1 discloses an extended-range fire-fighting nozzle and its method. This solution is a combination of a rod water nozzle and a columnar stream nozzle, where a portion of the water volume, at least 50%, is ejected as a solid stream, but the rod water nozzle is surrounded by an annular outlet for the columnar stream. The annular outlet can be closed or opened with a sleeve. This mixture of the two techniques is not desirable in implemented form because the flow conditions cannot be controlled with sufficient precision and the high proportion of solid streams is not practical.

DE 60 2004 003 303 T2 discloses a fire extinguishing device in which the fire extinguishing jet can be adjusted by means of three different nozzle units which are mounted on the main nozzle and can move with each other inside. In this case, the main nozzle of the fire extinguishing device delivers the fire extinguishing agent to three adjustable nozzle units and has a central cone in the flow path. The main nozzle has a multi-component design. Additionally, an additional ball valve is required to shut off the device. The downside here is that the design is complex and does not allow for simple and intuitive use.

The purpose of the present invention is to create a fire extinguishing device that is simple in design, provides a high level of safety to the user, and is effective in fire fighting.

The above object is achieved by an apparatus having the features of claim 1. Advantageous modifications are disclosed in the dependent claims.

Another objective is to provide a method of operating a fire extinguishing device that is simple, safe, and can ensure reliable operation.

The above object is achieved by a method having the features of claim 19. Advantageous modifications are disclosed in the dependent claims.

The device according to the invention can be used as a complete device that can be used on its own for fire fighting. However, it may also be part of a more complex device, especially an intrusive or invasive fire-fighting device (e.g. a wall-penetrating lance). That is, the piercing nozzle can be further developed using the design principles according to the present invention.

The device according to the present invention has a more compact and simple structure, thereby reducing weight and cost.

According to the invention, the known design principles are abandoned and a movable cone for changing the moment and expanding the jet is provided as a fixed component.

In contrast to known solutions, the housing edge of the device interacting with the cone is implemented to be axially movable.

This brings about several positive effects of the present invention.

The first effect observed is the possibility of an ideal flow guidance geometry in the nozzle segment of the jet nozzle. Thanks to the fixed walls, this geometry can ensure a low-turbulence flow path, which is difficult to achieve in hollow jet nozzles due to the internal steering mechanism.

Therefore, the flow distributor is implemented to prevent as much as possible sudden changes in the driving force caused by the component walls and ensure smooth flow at the outlet.

A second major advantage achieved by the present invention is that the size of the adjustment housing elements is drastically reduced. For example, the regulating housing element may be implemented as a bushing and may have a conical sealing surface. Thanks to the conical sealing surface, which is relatively easy to adjust differentially depending on the exit angle of the flow distributor, the outgoing jet can be formed in a very smooth manner. When properly executed, the fluid separates sharply into a smooth jet that can be injected into the fire space with virtually no friction loss.

An external regulating device therefore results in the fact that no additional moving parts are required between the fluid and the regulating device, thus allowing for a simpler design.

Above all, the device according to the invention with an adjustment mechanism can be particularly advantageously provided for fire extinguishing devices with a penetration function. The casing tube is cylindrical, small and slim in design, allowing highly efficient atomization in combination with invasive fire extinguishing techniques.

Therefore, the casing tube atomization system can be viewed as a stand-alone atomization unit for all types of fire extinguishing systems, as a stand-alone fire extinguishing system, and as the best choice for atomizing units in invasive fire extinguishing systems.

According to the invention, hydraulic forming of the casing tube is carried out in such a way that the overall tubular flow is divided into annular flows. For the purposes of the present invention, turbulence is kept as low as possible. This division accelerates the fluid. Advantageously, the high velocity proportional flow path is kept as short as possible, but not so short that the flow cannot pass through the structure without pulsation. In this process, the flow is simultaneously accelerated to the target exit velocity since the exit velocity is directly proportional to the atomization quality as explained above.

The next step in flow guidance is to deform the flow from axial to radial direction as continuously as possible. According to the invention, parabolic walls are particularly suitable for uniformly deforming the flow. Therefore, the aforementioned areas may overlap in terms of design as the shortest possible path must be followed to reduce friction.

At the location where the maximum possible exit angle is generated, the maximum flow velocity is also generated. The angle is defined by a person skilled in the art at the design stage and must be empirically matched to the opposite side.

The invention also has the advantage of the largest setting opening achieved by pulling back the operating mechanism. An important advantage is the fact that at the largest setting openings a kind of "panic position" is created and a protective jet is created for the operator. This large-area jet is therefore a kind of "personnel-protecting sprinkler" and is deployed as soon as the tube is fully open. Therefore, what is required is a rearward hand movement; The worker's possible panic reaction in all situations creates protective settings. Since workers are more likely to make a backward movement than a forward movement in a panic situation, this operating mechanism is an emergency logic that reliably protects the worker. Even if the worker falls backwards, the generated jet forms a shield jet around the worker that acts as a shield against the effects of soot gases and flames.

On the other hand, in known hollow jet nozzles, a complete opening in the main actuating element only results in ensuring maximum flow in a forward-directed, relatively narrow jet. This setup is problematic, especially if the operator is aware of a soot gas ignition or can immediately conclude that such an ignition is about to occur based on soot gas effects such as flames and other thermal effects. Therefore, existing solutions are inadequate and defective with regard to the occupational safety of emergency personnel. Unfortunately, there have been cases like this in the past.

According to a known embodiment, in such situations, especially in a panic, when the operating lever is pulled back, it switches to a sharply set fire extinguishing jet (with a shallow exit angle), which can protect the operator from soot gas ignition in the said situation. Not only is it not there, but an explosion (as has happened in the past) can dramatically worsen the situation. This is because concentrated injection causes the so-called ‘hydraulic ventilation effect’. In this case, the water jet itself sucks in a large amount of air. As a result, the fire or soot gases can advance to the explosive limit in rich mixtures by being precisely supplied with insufficient ambient air, which causes sudden ignition and, if this is already in progress, to accelerate.

In contrast, the fire extinguishing device according to the invention can be operated intuitively and, when the control element is in the retracted "panic or defense" position, creates a wide shield-like jet that surrounds the space and prevents the inhalation of combustion air. , protects emergency personnel from heat and hot soot gases, as described above.

Therefore, the device according to the invention exploits the effect of automatically creating this protective shield in a panic position, whereas the known hollow jet nozzles ensure this only by means of a number of counter-intuitive actions.

When the operator sets the overlapping position of the casing tube, it can be smoothly modulated from the maximum opening angle to the minimum contact angle, and the outlet velocity also increases, thereby changing the flow rate.

This is advantageous because the exit velocity and flow rate are measured from the lowest contact angle and can decrease as the jet diameter increases. By reducing kinetic energy, flow rate increases. This effect is very advantageous as it means that a larger jet diameter can cover a larger area.

Due to the greater surface effect, more water must be introduced to balance the vaporization energy. Lower exit energy produces less jet turbulence, but fog formation is driven by the larger effective area of the jet. Therefore, the wetted area of the cone can also be viewed as the circumferential surface of the cone.

Therefore, the circumferential surface of the cone is the product of the radius and chord length, but the effective depth and radius increase with the angle of impact, resulting in a quadratic relationship for the angle of impact. The tremendous increase in surface area compensates for the reduced exit velocity by increasing the wetting contact of the fluid particles.

Therefore, when correctly dimensioned, the device according to the invention advantageously has a purely mechanical self-regulation with optimal fog formation and water volume output at all jet angles.

The opening characteristics of the casing tube with respect to the resulting increase in outlet area can be determined by the conduit width of the stay vanes. In this way, a composite hollow jet nozzle with multiple components is almost completely replaced by two simple components. As mentioned above, automatic control of wetting area and flow rate is an advantage of the present invention that is not implemented in known fire extinguishing devices.

The nonlinear moment change according to the invention occurs at an intermediate position between the maximum impact angle (gravitational protection jet) and the minimum contact angle. This is because, especially at small opening angles, the deformation assumes larger dimensions than in the case of large opening angles.

Therefore, the operator can intuitively and smoothly manufacture a fire extinguishing jet that has almost linear atomization behavior while controlling the water quantity according to the control behavior of the opening angle.

Stay vanes must be attached to connect the flow distributor to the housing. At first glance, these stay vanes appear to be unfavorable to flow behavior. However, as mentioned above with regard to fog formation associated with fog nozzles of the type used in piercing nozzles, it is very advantageous to encapsulate the jet or split the fluid after the jet emerges. The wetted area increases and the friction between the extinguishing medium and the surrounding air also increases.

Therefore, this effect can be controlled through random variation of the stay vane. Therefore, the fire extinguishing device according to the invention must have at least one static connection between the flow distributor and the housing; Their number may vary depending on needs and embodiments.

Advantageously, the stay vanes can be designed with airfoil profiles. This can reduce the friction of the conduit to very low values compared to known fog nozzles with bores. Accordingly, conduit inlet turbulence and conduit outlet turbulence can be attenuated to a significant degree to achieve a homogeneous fog pattern.

Because the residual flow clears the sealing surface immediately before the slide valve closes, the casing tube simply rests on the slide seat, which is not susceptible to contamination when closed. On the other hand, known hollow jet nozzles with ball valves and adjustment mechanisms always have the disadvantage that sediment from the extinguishing water interferes with the mechanism.

The fire extinguishing device according to the invention, implemented in the form of a casing tube, is ideally suited for extinguishing fires close to the fire source.

Another advantageous embodiment also extends the field of application to the jet nozzle area. For this purpose, additional switching positions and corresponding design extensions are provided to achieve good range.

In order to be able to implement an opening angle range of a low angle range of 0 degrees to about 40 degrees in addition to the above-mentioned opening angle range of about 40 degrees to 180 degrees of the exit jet, the fluid must be guided using a different structure. In this case, the application of the fire extinguishing device according to the present invention should be viewed as a single solution, not as a solution related to a piercing nozzle, but as a solution in fire extinguishing technology that seeks to achieve a long range.

In order to use the casing tube atomization according to the invention in the field of hollow jet nozzles where a jet angle in the range of 0 degrees to 180 degrees of opening angle is required, the fire extinguishing device according to the invention has a widened jet nozzle attachment. It is implemented as

In contrast to the flow distributor, the flow moves through this nozzle to the jet nozzle attachment only when a wider flow path is required. In this case, fluid enters the widened jet nozzle attachment through the flow distributor and via a bypass path within the casing tube. At this nozzle attachment, the fluid re-collects and forms a light hollow jet. Here the extent of the lower region of the fire can be deformed by the casing tube, which once again changes the deformation angle of the outlet nozzle by a slight axial movement.

The device according to the invention in the form of a casing tube atomizing unit can be implemented to be similar to a hollow jet nozzle in terms of handling. However, the main advantage is that both adjustment and blocking can be carried out using the main operating lever, or, more precisely, through axial adjustment of the casing tube. Move the lever all the way forward to turn off the device.

In the present invention, in developing a fire extinguishing device that can be used to reliably extinguish a fire both at a short distance and at a long distance, there are advantages in that the work safety of workers is significantly improved, handling is improved, and it is intuitively designed.

The present invention therefore relates in particular to a fire extinguishing device comprising a support tube and a casing tube axially movable on the support tube, wherein a flow distributor assembly comprising a flow distributor cone is provided on the support tube, the flow distributor assembly extending outwards. Forming an annular orifice facing forward, the casing tube moves over the orifice with its front edge to open and close the latter so that the fluid flow entering the flow distributor assembly from the support tube is split into annular flows and directed outward into the orifice.

According to one variant, all flow transfer elements have a coaxial cylindrical shape in cross section.

According to one variant, the flow distributor cone has a conical wall extending parabolically from the tip protruding from the front along the axial direction into the flow path of the fluid, and the flow distributor cone is rigidly attached to the tubular wall by a guide vane. Connected, the conical wall and the tubular wall define a flow path, which in the region of the guide vane is further divided into a plurality of flow paths.

According to one variant, the walls of the flow distributor assembly narrow the flow path in a nozzle-like manner, and after the maximum convergence area or narrowing, the diameter increases again to form a funnel-like wall section circumferentially defining the orifice. do.

According to one variant, the flow distributor cone projects axially into a funnel-like region or funnel-like orifice of the housing bounded by a wall and a space defined by the wall, wherein the flow distributor cone has a maximum convergence area. or extending with the tip beyond the reduced area of the wall and into the tubular interior of the housing.

According to one variant, the annular orifice of cylindrical shape is defined by a funnel-like wall section in the axially posterior region and by the conical wall in the axially anterior region.

According to one variant, the casing tube has at its front edge a conical sealing surface in the form of an inclined wall extending backwards along the axial direction inward from the outer peripheral edge of the casing tube to the inner peripheral edge.

According to one variant, the flow distributor assembly has a corresponding conical sealing surface on the flow distributor cone in the form of an inclined wall section extending from a maximum radial size area of the flow distributor cone to a circumferential cylindrical step, said wall They extend in the same direction as each other.

According to one variant, the walls extending in the same direction have a different and in particular more inclined angle of inclination than the walls defining the orifice so as to create a moment change.

According to one variant, the casing tube extends from the rear end of the fire extinguishing device to a diametrically or axially opposite front end, such that a radially continuous circumferential slot is provided in the resulting expansion area and the extension is located inside the expansion region. forming a curvature, the wall of the flow distributor cone extends parabolically to the area of the maximum extension and diverges into a convex curve, and the area between the curvature and the maximum extension and the front edge of the wall is of the fire extinguishing device. At the hollow jet location, a hollow jet flow path is jointly formed.

According to one variant, the front part of the expansion area with struts spanning the slots is located on the casing tube.

According to one variant, the area of the maximum extension of the flow distributor cone ends in diameter at a level parallel to the wall and has the same diameter, so that the area can be traversed by a casing tube, in particular closing the orifice. is traversed by an edge in order to

According to one variant, a wall section is positioned spaced apart from a conically extending inclined wall of the casing tube by a partition, the wall section extending radially and slightly curved, and a circumferential wall section extending from the wall on the inside and said The extension region has an inner circumference corresponding to the outer circumference of the maximum expansion region, such that the regions or the wall slide relative to the wall of the region in a form-fitting but axially movable manner.

According to one variant, the front portion widens with a curvature from an inner circumferential edge axially spaced from the wall and then narrows forward to a circumferential edge, the path of the curvature essentially following the path of the wall, The wall section located between the inner circumferential edge and the front circumferential edge and in particular the curvature form the outer wall of the hollow jet passage.

According to one variant, in the furthest drawn position of the casing tube, the hollow jet flow path is formed by the fact that the leading edge of the casing tube and the wall edge of the funnel-like section end flush with each other, , a flow distributor cone formed by the curvature and the wall extends the orifice and deforms the flow path into an annulus along the axial direction.

According to one variant, the hollow jet location is blocked by a barrier that the user must overcome through additional manipulation.

According to one variant, a connection for connection to a fire extinguishing agent delivery hose is provided at the rear end of the fire extinguishing device.

According to one variant, at the front end the fire extinguishing device has a lighting field located in the flow distributor assembly.

Another aspect of the invention relates to a method of extinguishing fire by means of the above-described fire extinguishing device, wherein the opening and closing and adjustment of the extinguishing jets is achieved by means of a movable casing tube.

According to one variant, the flow rate of the extinguishing agent through the opening in the cross section of the orifice leading into the casing tube is adapted to the enlarged distribution funnel through a reduction in kinetic energy.

According to one variant, the maximum opening of the orifice by the casing tube establishes an outwardly extending shield-like attractive protective jet.

According to one variant, the jet cone is adjusted, in particular to be narrowed and directed forward, by sliding the casing tube forward.

According to one variant, the maximum pull of the casing tube, especially over the barrier, is used to transform the radial flow path into a forward-facing annular axial hollow jet, in which case the corresponding casing tube and flow distributor assembly A hollow jet flow path is formed.

According to the present invention, an advantage is that a simply designed and reliable fire extinguishing device is created. The fire extinguishing device consists of several parts, and optimal flow results can be ensured by the fact that the flow distributor assembly is formed in one piece and in particular the flow distributor cone is immovable. Through jet conditioning with the casing tube according to the invention, perfect casing tube atomization can be achieved, which ensures highly effective fire fighting with the highest possible safety of the operator. Basically, the simple design makes it easy to maintain and repair.

The invention will be explained by way of example with the aid of drawings. In the drawing:
Figures 1a-1e: show five views of one embodiment of a fire extinguishing device according to the invention.
2A-2G: Shows several views and cross-sections of one embodiment of a flow distributor assembly of a fire extinguishing device according to the present invention.
Figure 3: Shows a fire extinguishing device according to the invention with a partial longitudinal section of the flow distributor assembly area in a personnel-safe position.
Figure 4: Shows the device according to Figure 3 with the water cone in the forward facing position.
Figure 5: Shows the fire extinguishing device according to the invention in the position of the hollow jet nozzle.
Figures 6a-6c: Shows the flow distributor assembly with the casing tube in the open extinguishing jet position.
Figures 7a-7c: Shows flow distributor assembly with casing tube in personnel-safe position.
Figures 8a-8c: Shows a flow distributor assembly with the casing tube in a position where the extinguishing jet is directed forward in a cone shape.
Figures 9a-9c: Shows the flow distributor assembly and casing tube in a much more forward jet position.
Figures 10a-10c: Shows the flow distributor assembly and casing tube in a nearly closed flush position with the flow distributor edge.
Figures 11a-11c: The fire extinguishing system is shown in the closed position.
Figure 12: Partial cutaway view of the flow distributor assembly area, showing the fire extinguishing device in the closed position.
Figure 13: A fire extinguishing device according to the invention is shown in a partial cutaway view showing the flow path and the operating lever in the hollow jet nozzle operating position.
Figure 14: Shows the fire extinguishing device according to the invention in the extinguishing position where a conical extinguishing jet is produced.
Figure 15: Shows the fire extinguishing device according to the invention in a personnel protection position.
Figures 16a-16c: Show extinguishing agent flow path in the flow distributor assembly when the casing tube is open.

The fire extinguishing device (1) according to the invention has a hollow cylindrical support tube (2), and the handle (3) is located on the hollow cylindrical support tube (2). The support tube (2) has at its rear end (4) a hose connection coupling (5) for connection to a conventional fire hose.

The fire extinguishing device (1) also has a casing tube (6) movably positioned on the support tube (2) and having an inner diameter approximately corresponding to the outer diameter of the support tube (2).

The axially movable casing tube (6) has a longitudinal opening (7) on its underside adjacent to the end (4) through which the handle (3) can pass. An operating lever (8) is also provided. The operating lever (8) has a rectangular profile with an upper transverse strut (9), two longitudinal struts (10) extending perpendicularly at its ends and connected by transverse struts (9), and a handle (3). ) has two short transverse struts (11) in the vicinity. With short transverse struts 11 corresponding to the width of the handle 3 and forming an intermediate space between them, the operating lever 8 is rotatable on the handle 3 by means of a shaft 12. Located. For operation of the casing tube 6, shaft stubs 13 protrude laterally from the casing tube 6 and extend radially laterally from the outer circumferential surface 14 of the casing tube 6 and have a longitudinal opening. It can be seen from each of the longitudinal struts 10 that lie at 15 and extend parallel to each other. Accordingly, by the rotational movement of the handle 3 about the shaft 12, the casing tube 6 moves axially on the support tube 2 by the shaft stub 13; In this process, the shaft stub 13 can slide along the longitudinal opening 15.

On the outer surface of the casing tube 6 from the rear end 4 towards the opposing front end 16 along the radial or axial direction, this embodiment has an extension with a step 17 . A radially continuous circumferential slot 18, axially offset from the step 17 towards the end 16, is provided in the expansion area 19 adjacent to the step 17 in the casing tube 6 and is provided in the front portion ( 19) from the casing tube 6, but the front part 19 and the casing tube 6 are connected by a partition 20 connecting the slots 18.

In the area of the free end 16 of the fire extinguishing device 1, an inwardly extending cavity 21 is provided and a lighting device 22 with a corresponding optical system is located in the cavity 21. The cavity 21 and the lighting device 22 are surrounded by a radial wall 23, which is part of a flow distributor assembly 27, which will be described in more detail later. An annular outlet conduit (25) for the hollow jet of extinguishing agent is formed between the wall (23) and the free circumferential edge (24).

Inside the casing tube (6), a flow distributor assembly (27) is located screwed to the front end of the support tube (2) (Figure 3). The flow distributor assembly 27 (FIG. 2) has a housing 26 having a cylindrical wall 29 and a hollow cylindrical connecting region 28 with an external thread 30 on the cylindrical wall 29. The external thread 30 is designed so that it can be screwed onto the internal thread 31 of the connection area 32 of the support tube 2 (Figure 3). For this purpose, the support tube 2 has a front connection area 32 with a front circumferential edge 33 .

The flow distributor assembly 27 or its housing 26 is widened after the external thread 30 through a step 34 to an outer diameter corresponding to that of the support tube 2 . The step 34 extends radially outward and serves as a stopper for the front circumferential edge 33 of the support tube 2. Adjacent to the step 34, a groove 35 for receiving a seal may be provided between the step 34 and the external thread 30.

The housing 26 extends with a cylindrical outer wall 36 to a front circumferential edge 37 and is provided adjacent to the front circumferential edge 37 with a circumferential groove 38 for receiving a seal. Between the groove 38 and the step 34, the wall 36 is provided with an opening 39; The openings 39 may extend transversely longitudinally and form a partition 40 between the openings 39 . The opening 39 and the partition 40 form a cage-like arrangement.

In the area of step 34, shell wall 29 is split to form an outer cylinder shell wall 36 and an inner nozzle wall 41. The nozzle wall 41 extends in a converging manner from a step 34 or groove 35 to a maximum convergence area 42 . From there, the funnel-shaped wall section 43 of the nozzle wall 41 widens sharply in a funnel-shaped manner to the front circumferential edge 27, where the nozzle wall 41 correspondingly extends approximately in the area of the circumferential groove 38. It is again joined to the cylindrical wall (36). Accordingly, a funnel-shaped expansion orifice 45 is formed.

The axial length of the converging nozzle wall 41 corresponds to approximately 4 to 5 times the axial length of the funnel-shaped wall section 43 of the nozzle wall 41. Therefore, between the cylindrical wall 36 and the nozzle wall 41 there is a cavity 44 accessible through the opening 39, and the cylindrical wall 36 serves to guide the casing tube 6 and the opening 39. The cavity 44 between the cylindrical wall 36 and the nozzle wall 41 serves to reduce weight. Instead of cavity 44, this area may also be machined from a solid material.

The flow distributor cone 46 protrudes from the circumferential edge 37 into a funnel-like region or funnel-like orifice 45 of the housing 26 defined by wall 43 and into the space defined by wall 41. wherein the flow distributor cone 46 has a tip 50 extending inwardly beyond the maximum convergence area 42 of the wall 41.

In the area of maximum convergence 42 or in the area where the wall 41 narrows, the flow distributor cone 46 is guided by the wall 41 or 43 in the form of guide vanes 47 such that a flow conduit 51 is formed between the partitions 47. ) is connected to the housing 26 with a partition connected to .

The flow distributor cone 46 is hollow and has a conical wall 48 that is concave or parabolically widens outward from the tip 50 to the area of the maximum extension 49, the flow distributor cone 46 having a wall ( It has an outer diameter corresponding to the outer diameter of 36). From the area of the maximum expansion 49 the flow distributor cone 46 tapers slightly and then extends with a much smaller diameter and very slightly widens again to the front circumferential edge 23 . The flow distributor cone 46 or its wall 48 extends from a maximum convergence area 42 or narrowing area of the wall 41 substantially parallel to the funnel-shaped wall 43 of the nozzle wall 41. This forms an annular conduit as the nozzle and the orifice 45 is formed as an annular gap orifice.

6 to 11 show one embodiment of a fire extinguishing device capable of both forward-facing personnel protection jets and cone-like fire-fighting jets, which could also be used in invasive fire extinguishing devices, in which case walls, roofs, Additional components used to penetrate or pass through doors, etc. are then connected to the flow distributor cone 46.

In this embodiment, the casing tube 6 does not have a circumferential slot or extension step 17 but instead terminates with a sharp peripheral edge 53.

The flow distributor cone (46) terminates in the area of the maximum extension (49) with the monocylindrical wall section (54), and in the region of the monocylindrical wall section (54) the flow distributor cone (46) terminates in the area of the casing tube (6). It has an outer diameter that ends flush with the outer diameter. A conical inclined peripheral wall section 55 with a slope corresponding to the slope of the sloped wall section 56 in the casing tube 6 from the pointed outer peripheral edge 53 thereto to the recessed inner peripheral edge 57 is a monocylindrical wall. It faces inward adjacent to section 54.

The conical inclined circumferential wall section 55 of the flow distributor cone 46 terminates in a concentric monocylindrical wall section 58 forming a step in the corresponding parabolically extending conical wall 48 . The circumferential cylindrical wall 58 or step 58 has an outer diameter that corresponds to the outer diameter of the wall 36 of the flow distributor assembly 27.

Figures 6a-11b show various positions of the casing tube 6, which will be explained below.

Figure 6 shows the position of the casing tube 6 where the inclined wall section 56 or inner circumferential edge 57 therein terminates at the front circumferential edge 37 of the flow distributor assembly. In this case, the extinguishing agent, typically water, may enter the flow assembly 27 through the support tube 2 (omitted in Figures 6-11 for clarity). The fact that the nozzle walls 41 are conically tapered with respect to the area of maximum convergence 42 increases the flow velocity, which means that the flow distributor cone has a tip 50 and protrudes into the tapering area between the nozzle walls 41. This is further increased by the fact. The guide vanes 47 define the flow conduit 51 between them, which further increases the flow speed, since on the one hand the available flow paths are limited and on the other hand the flow conduit is narrowest in this area.

The guide vanes 47 may themselves have a profile, for example an airfoil profile, to influence the flow accordingly. As already explained above, the conical wall 48 of the flow distributor cone is advantageously formed parabolically in the circumferential direction so that the flow is uniformly deformed. In the flow distributor assembly 27, the tubular flow coming from the support tube 2 is split by a flow distributor cone 46 into an annular flow towards the orifice 45. Due to the harmonic geometry of the parabolic wall 48 of the flow distributor cone 46 on the one hand and the wall path of the nozzle wall 41, especially in the area of the funnel-shaped wall section 43, on the one hand, turbulence is minimized. The fluid is accelerated by splitting, and the proportional flow path with high velocities remains very short. During this process, the flow is accelerated to the target exit velocity.

Figure 7 shows a configuration in which the casing tube 6 is pulled back long. This is a personnel-protecting jet position where the jet of fire water is essentially accelerated radially outward. The pointed peripheral edge 53 of the casing tube 6 is pulled back so that the pointed edge and the wall 56 do not deform the emerging jet forward.

In contrast (FIG. 8), when the wall 56, especially the inner peripheral edge 57 and the outer peripheral edge 53 of the casing tube 6, are in the area of the orifice 45, the wall 56 and the edges 53 , 57) clearly transforms the rising jet into a forward-facing conical jet shape.

If the orifice 45 is further closed by pushing the casing tube 6 forward (Figure 9), further regulation occurs, where the flow velocity increases, but then the flow velocity decreases with a closed position of more than half of this type. decreases.

By sliding the casing tube 6 further forward (FIG. 10), there is a gap between the inner peripheral edge 57 of the front wall 56 of the casing tube 6 and the conical wall 48 in the area of the circumferential cylindrical wall 58. A point of shedding is reached where only a very narrow gap remains. This is the spill point where any impurities present will flow out through this gap.

11 the walls 55, 56 are in full contact with each other, the circumferential edge 57 touches the common end of the wall 56 and the circumferential cylindrical section 58, and the outer edge 57 touches the flow distributor cone 46. ) is shown in a fully closed position, ending flush with the cylindrical peripheral wall section 52. In the embodiment according to FIGS. 6a to 11b , of course a corresponding flashlight or lamp 22 can be positioned within the cavity 21 , optionally incorporating a lens so that in case of darkness or poor visibility the operator can be directed in the direction of extinguishing the fire. You can also use a pointing light cone. An important advantage of this lighting arrangement is that it transmits photons much better than dense fire smoke, thanks to reflection or transmission of the light jet by the extinguishing water.

The embodiment according to FIGS. 6A to 11B can also produce forward-facing cone-shaped fire-fighting jets in addition to personnel protection jets. As already explained, the embodiment achieves an extreme atomization of the jet so that the maximum possible surface area of the fluid is available for vaporization, which on the one hand reduces the temperature in the fire space very quickly. , on the other hand, limits the amount of fire extinguishing agent to the extent that water damage can be minimized. Furthermore, the embodiment of the flow path according to the invention and the stationary flow distributor cone on the one hand and the guide vanes 47 on the other achieve a harmonious flow path with a confined flow (in contrast to a movable flow distributor). Thus, a long range can also be achieved.

As mentioned above, this embodiment is also suitable for use in invasive fire protection equipment, in which case the flow distributor cone 46 is capable of penetrating walls, doors, roof structures, etc. that define the boundaries of the fire space. If the fire extinguishing device protrudes far enough into the fire space so that a response jet can be deployed into the fire space at the moment of penetration, the fire extinguishing device can be extinguished within the fire space through casing tube atomization according to the present invention. This can happen.

This device can of course also be used as a full-fledged fire extinguishing device through casing tube atomization as shown in the drawing.

The embodiment according to FIGS. 1a-1e may additionally generate a forward-facing hollow jet. The flow distributor assembly 27 according to FIGS. 2a to 2g is used.

Here too the wall 48 of the flow distributor cone 46 extends parabolically to the area of the maximum extension 49 and then branches out in a curve and once again branches outward. The area between the maximum extension 49 and the front edge 23 in this embodiment forms the inner circumferential wall of the hollow jet position.

As already explained, in this case the casing tube 6 has a front part 19 which is positioned on the body of the casing tube 6 by means of a strut 20 . The struts 20 are radially aligned with a partition 47 , which is implemented as a guide vane between the flow distributor cone 46 and the nozzle wall 41 . But they can also be offset in relation to each other.

In this embodiment, the region of the maximum extension 49 of the flow distributor cone 46 ends in a circumferential view at a level parallel to the wall 36, so that the region 49 has a casing tube for closing the orifice 45. 6), and in particular by edge 57. Opposite the inclined wall 56 of the casing tube 6, spaced apart by the partition 20, there is a radially extending and slightly curved wall section 61, with a circumferential wall section 62 extending from the inner wall 61. and the front portion 19 has an inner circumference corresponding to the outer circumference of the region of maximum extension 49, so that these regions or walls 62 conform to the shape of the region 49 in such a way that they are axially movable. It can slide against the wall 48. From the inner peripheral edge 63 at some distance from the wall 61, the front portion 19 expands with a curvature 64 and then narrows forward to the peripheral edge 34. The wall section located between the inner circumferential edge 63 and the front circumferential edge 34, in particular the curvature 64, forms the outer wall of the hollow jet flow path.

As shown at the personnel protection jet location in Figure 3, the fire extinguishing agent flows similarly to the way it flows in the other embodiments described, and is thus divided into an annular flow by a flow distributor cone 46, at which position an annular orifice 45 ) flows outward, hits the wall 61 of the front part 19, and is radially deformed outward. In this personnel protection position the actuating lever 8 is locked, preventing it from being pulled back further in order to reliably achieve this personnel protection jet position in a panic situation. If the operating lever 8 is moved further forward, this results in a jet adjustment comparable to the other embodiments described above and creates a forward-directed conical jet. In this case, the wall 56 terminates at a level parallel to the funnel-shaped wall section 43 of the flow distributor assembly 27, which limits the perimeter of the orifice 45 on the outside, effectively extending the orifice 45. In the area of the maximum extension 49 of the flow distributor cone 46 the flow is separated on this side and the jet is directed outwards towards the front.

Figure 5 shows hollow jet positions achievable by this embodiment. In this position the operating lever (8) and casing tube (6) must be pulled rearwards beyond the panic position; Preferably, this can only be achieved by pushing the lever down or pulling it up over an insurmountable barrier, preventing this position from being created in a panic or emergency situation. In the hollow jet position, the edge 63 of the front portion 19 and the edge 37 of the flow distributor assembly 27 terminate flush with each other.

On the one hand, the conical wall 48 and the inner wall, especially the curvature 64, of the front part 19 together form a hollow jet flow path 25, which on the one hand is formed in the front part ( It is defined on the outside by the peripheral edge 34 of the flow distributor cone 46 on the other hand by the peripheral edge 34 of 19) and is also narrowed in the front area to increase the flow velocity.

This creates a hollow jet that points forward.

In this case, the edge 57 of the casing tube 6 passes through the area of the maximum extension 49 and completely blocks the orifice 45 from the outside, so that when the lever 8 is pushed all the way forward, it reaches the closed position ( Figure 12) is reached.

Figure 13 depicts very schematically the flow path of the personnel protection jet location. It is quite clear how the annular flow is created, by the nozzle wall 41 of the flow distributor assembly 27 on the one hand and the flow distributor cone 46 on the other, in this case collision with the wall 61. This occurs and the jet is deformed radially outward.

Figure 14 shows the jet position as a forward-facing conical jet, where casing tube atomization allows for particularly good fire protection at close range and good atomization is achieved at good range; The location here corresponds to the location in FIG. 4.

Figure 15 shows the forward facing position of the hollow jet along with the corresponding flow path of the outgoing fire water.

16A and 16B show the flow path of the flow distributor assembly 27 past the tip 50 of the flow distributor cone, through the flow tube 51 to the orifice 45 and from there to the outside. Flow splitting is once again evident in the detailed enlargement shown in Figure 16b.

According to the present invention, an advantage is that a simply designed and reliable fire extinguishing device is created. The fire extinguishing device consists of several parts, and optimal flow results can be ensured by the fact that the flow distributor assembly is formed in one piece and in particular the flow distributor cone is immovable. Through jet conditioning with the casing tube according to the invention, perfect casing tube atomization can be achieved, which ensures highly effective fire fighting with the highest possible safety of the operator. Basically, the simple design makes it easy to maintain and repair.

1: Fire extinguishing device 2: Support tube
3: Handle 5: Hose connection coupling
6: Casing tube 8: Operating lever
9: transverse strut 10: longitudinal strut
11: short transverse strut 12: shaft
13: shaft stub 16: end
17: Step 21: Joint
22: lighting device 25: annular outlet conduit
26: Housing 27: Flow distributor assembly
28: Hollow cylindrical connection area: 29: Shell wall
45: Orifice 46: Flow distributor cone
47: Guide vane

Claims (23)

comprising a support tube (2) and a single casing tube (6) movable along the axis on said support tube (2) for regulating and opening and closing the extinguishing jet,
A flow distributor assembly (27) is disposed on the support tube (2) and includes a housing (26) and a flow distributor cone (46), wherein the flow distributor assembly (27) includes the housing (26) and the flow distributor cone (46). Forming an annular orifice (45) facing outward between the cones (46),
The front edges (53, 56, 57) of the casing tube (6) are movable above the orifice (45) to open and close it so that the fluid flow flowing from the support tube (2) into the flow distributor assembly (27) is annular. A fire extinguishing device divided into flows directed outwards to said orifice (45). 2. Fire extinguishing device according to claim 1, characterized in that all flow transfer elements (2, 27) are coaxially cylindrical in cross section. 3. The flow distributor cone (45) according to claim 1 or 2, wherein the flow distributor cone (45) has a conical wall (48) extending parabolically from the tip (50) projecting from the front along the axial direction into the flow path of the fluid, The flow distributor cone 46 is rigidly connected to the tubular wall 41 by a guide vane 47, the conical wall 48 and the tubular wall 41 defining a flow path, the guide vane ( Fire extinguishing device, characterized in that in the region of 47) the flow path is further divided into a plurality of flow paths (51). According to one of the preceding claims, the wall (41) of the housing (26) of the flow distributor assembly (27) narrows the flow path in a nozzle-like manner and, after narrowing, or the area of maximum convergence (42), the diameter is characterized in that it increases again to form a funnel-like wall section (43) circumferentially defining said orifice (45). 2. The flow distributor cone (46) according to any one of the preceding claims, wherein the flow distributor cone (46) is defined by a funnel-like region or funnel-like orifice of the housing (26) bounded by a wall (43) and said wall (41). Projecting axially into the space, the flow distributor cone 46 extends with its tip 50 into the tubular interior of the housing 26 beyond the maximum convergence area 42 or narrowing area of the wall 41. A fire extinguishing device characterized in that. The annular orifice (45) of circumferential shape is defined by the wall (43) of the housing (26) in the axially rear region and the flow distributor cone (45) in the axially front region according to any one of the preceding claims. Fire extinguishing device, characterized in that it is defined by the wall (48) of 46). 2. The casing tube (6) according to any one of the preceding claims, wherein the casing tube (6) has an inclined wall extending rearwardly along the axial direction inward from the outer peripheral edge (53) of the casing tube to the inner peripheral edge (57) at the front edge. (56) A fire extinguishing device characterized by having a conical sealing surface of shape. 2. The flow distributor assembly (27) according to any one of the preceding claims, wherein the flow distributor assembly (27) comprises an inclined wall section (55) extending from a region of maximum radial size (49) of the flow distributor cone (46) to a circumferential cylindrical step (58). A fire extinguishing device, characterized in that it has a corresponding conical sealing surface on the flow distributor cone (46) in the form of, wherein the walls (56, 55) extend in the same direction as each other. 9. The method of claim 8, wherein the walls (55, 56) extending in the same direction have a different and in particular more inclined angle of inclination than the walls (48, 43) defining the orifice (45) so as to create a moment change. A fire extinguishing device. 8. The method according to claim 1, wherein the casing tube (6) extends from the rear end (4) of the fire extinguishing device (1) to a diametrically or axially opposite front end (16), A radially continuous circumferential slot 18 is provided in the resulting enlarged area 19, the extension forming a curvature 64 in the interior of the enlarged area 19 and the wall of the flow distributor cone 46. 48 extends parabolically into the region of the maximum extension 49 and diverges into a convex curve, between the curvature 64 and the front edge 23 of the maximum extension 49 and the wall 48. Fire extinguishing device, characterized in that the regions jointly form a hollow jet flow path (25) at the hollow jet location of the fire extinguishing device (1). 11. Fire extinguishing device according to claim 10, characterized in that the front part of the extension area (19) with struts (20) spanning the slots (18) is located on the casing tube (6). 12. The method according to claim 10 or 11, wherein the region of the maximum extension (49) of the flow distributor cone (46) ends in diameter at a level parallel to the wall (36) and has the same diameter, 49) is traversed by a casing tube (6), in particular by an edge (57) for closing said orifice (45). 13. The method according to any one of claims 10 to 12, wherein a wall section (61) is positioned spaced apart from a conically extending inclined wall (56) of the casing tube (6) by a partition (20), said wall section (61) 61 extends radially and is slightly curved, a circumferential wall section 62 extends from the wall 61 on the inside and the extension area 19 corresponds to the outer circumference of the area of the maximum extension 49. Fire extinguishing device having an inner circumference, so that the zones (14, 19) or the wall (62) slide against the wall (48) of the zone (49) in a form-fitting but axially movable manner. 14. The method according to any one of claims 10 to 13, wherein the front portion (19) widens with a curvature (64) from an inner circumferential edge (63) axially spaced from the wall (61) and then narrowing to the circumferential edge 34, the path of the curvature 64 essentially following the path of the wall 48, with the Fire extinguishing device wherein the wall section and in particular said curvature (64) form the outer wall of the hollow jet passage (25). 15. The method according to any one of claims 10 to 14, wherein in the most distal position of the casing tube (6) the hollow jet passage (25) is adjacent to the edge (63) and the edge (37) of the wall (48). ) are formed by the fact that they end at a height parallel to each other, extending the orifice 45 by a flow distributor cone formed by the curvature 64 and the wall 48 and directing the flow path in an axial direction. A fire extinguishing device characterized in that it is transformed into an annular shape. 17. Fire extinguishing device according to any one of claims 10 to 16, wherein the hollow jet location is blocked by a barrier that must be overcome by additional manipulation by the user. Fire extinguishing device according to one of the preceding claims, characterized in that a connection (5) for connection to a fire extinguishing agent delivery hose is provided at the rear end (4) of the extinguishing device. Fire extinguishing device according to one of the preceding claims, characterized in that at its front end, the fire extinguishing device (1) has a lighting device (22) located in the flow distributor assembly (27). Method for extinguishing a fire by means of a fire extinguishing device according to any one of the preceding claims, characterized in that the opening and closing of the fire extinguishing device as well as the regulation of the fire extinguishing jets are produced by a single casing tube (6). 20. Method according to claim 19, characterized in that the flow rate of extinguishing agent through the opening in the cross section of the orifice (45) leading into the casing tube (6) is adapted to the enlarged distribution funnel through a reduction in kinetic energy. 21. Method according to claim 19 or 20, characterized in that an outwardly extending shield-like attractive protective jet is established by the maximum opening of the orifice (45) by the casing tube (6). 22. Method according to any one of claims 19 to 21, characterized in that the jet cone is adjusted, in particular to become narrow and directed forward, by sliding the casing tube (6) forward. 23. The method according to any one of claims 19 to 22, wherein the maximum pulling of the casing tube (6) is used to transform the radial flow path into a forward-facing annular axial hollow jet, especially beyond the barrier. Characterized in that a corresponding hollow jet flow path (25) is formed by the casing tube (6) and the flow distributor assembly (27).

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