WO2007036554A1

WO2007036554A1 - Jet pipe unit and method for producing an extinguishing agent mist

Info

Publication number: WO2007036554A1
Application number: PCT/EP2006/066846
Authority: WO
Inventors: Wolfgang Krumm; Hubert Schulte
Original assignee: Airmatic Gesellschaft für Umwelt und Technik mbH
Priority date: 2005-09-30
Filing date: 2006-09-28
Publication date: 2007-04-05
Also published as: ES2332329T3; EP1928558A1; DE502006004998D1; ATE444100T1; EP1928558B1; PT1928558E

Abstract

A jet pipe unit for delivering extinguishing agent comprises at least one jet pipe (2) which is supplied with a pressurised extinguishing agent and provided with a tubular body (3) comprising an extinguishing agent input orifice and extinguishing agent output orifice formed by at least one nozzle (4), which, according to said invention, is rotatably movable around the longitudinal axis (5) thereof and/or a circular path which surrounds the axis of rotation in a concentric manner. Said invention also relates to a method for producing the extinguishing agent mist consisting in compressing a extinguishing agent, for example water, in supplying said extinguishing agent to a jet pipe unit (1) comprising at least one jet pipe (2) which is provided with one or several nozzles (4) in the form of the extinguishing agent output orifice, in forming the extinguishing agent jet (41) with the aid of a first jet unit section (42) embodied in the form of a beam substantially defining the jet width and a subsequent section in a jet through direction, wherein the jet, when the speed is rapidly reduced at a short distance, multiplies the cross-section surface in such a way that the extinguishing agent mist (43) is formed. The extinguishing agent jet rotatable about the longitudinal axis thereof is formed by rotationally displacing the jet pipe unit nozzle and/or the jet pipe unit at a value of an axis of rotation corresponding to the extension of the extinguishing agent jet longitudinal axis.

Description

Beam tube unit and method for forming a extinguishing agent fog

The invention relates to a jet pipe unit for extinguishing agent delivery, comprising at least one pressurizable extinguishing agent acted upon jet pipe having a tubular body having an extinguishing agent inlet opening and with a formed from at least one nozzle of the extinguishing agent outlet extinguishing agent outlet.

For firefighting, water is used as extinguishing agent in many cases. This is sometimes provided with an extinguishing agent additive. When fighting fires, it is necessary to use the extinguishing agent to cool the fire and smother the fire. At the disposal of a fireman are different jet pipes or jet pipe units which, depending on their design, produce a different extinguishing agent jet. For example, full jet or hollow jet pipes are known. It is also known that fire fighting using a liquid extinguishing agent, for example water with small extinguishing droplets in the form of an extinguishing agent mist, is more effective than fire fighting with a full or hollow extinguishing agent. In order to produce such an extinguishing agent mist, a gaseous blowing agent is required in addition to the extinguishing agent, as described in DE 295 22 023 U1. The propellant is used to atomize the aqueous extinguishing agent, for example, the water at the exit from the jet pipe. In addition, this previously known jet pipe unit has a fast-reacting closing element for chopping the extinguishing agent jet emerging from the jet pipe. From this previously known beam tube unit thus emerge from the jet pipe to a beam bundled water droplets. Already after a throw of only a few meters spreads the extinguishing agent mist. Therefore, these radiant tube units are only suitable for fire fighting, if you can get close enough to the fire with the tailpipe unit. Such radiant tube units and the corresponding prior art method are thus unsuitable for forming a fire extinguishing agent for firefighting fire sources in the immediate vicinity you can not get, as this is the case for example in a forest fire. The field of application of radiant tubes used for fire Therefore, in most cases they are only used in portable fire extinguishers.

The formation of extinguishing mists is also known from permanently installed, so-called sprinkler from buildings, ships or the like. In such sprinkler systems, the extinguishing water is atomized by the extinguishing agent into conductive internals in the outlet nozzles, so that the emerging extinguishing agent jet is formed from individual droplets and the extinguishing agent jet is cone-shaped with the largest possible opening angle. Finally, you want to be able to moisten the largest possible area with the escaping extinguishing agent.

It has become known for firefighting in wildfires also the use of jet engines as turbines to blow extinguishing agent as extinguishing agent mist to the point of fire. The turbine is used to generate the extinguishing agent mist from the aqueous extinguishing agent, such as water, as well as for transporting the extinguishing agent to the fire. In this fire extinguishing device, the goal is pursued with the energy of a strong air flow to produce the generated extinguishing agent mist - the individual droplets - as far as possible. Even if the extinguishing agent droplets produced can sometimes be shot up to 80 m with such a fire-extinguishing device and the jet pipe unit designed as a turbine, the extinguishing agent mist as such develops after only a few meters with the consequence that only a small proportion of the extinguishing agent droplets produced actually be transported over the aforementioned throwing distance. Therefore, this fire-fighting equipment is suitable despite high energy use only for fighting fire sources at a distance of about 50 m. Moreover, targeted fire fighting is hardly possible with such a device.

A disadvantage of these prior art extinguishing equipment is also the consumption of extinguishing agent, which is problematic in a fire fighting in which no continuous fire water supply (hydrant, fire water pond) can be built, as typically in forest fires. WO 94/06517 A describes a method and a device for fire fighting. The method described in this document alternately generates a liquid mist and a jet of liquid for firefighting. The alternate design of the extinguishing medium jet serves the purpose of fighting firefighting from a greater distance to the fire with a conventional high-pressure extinguishing agent jet in a first step. If the fire to be combated has cooled down far enough, you can approach the fire and then fire at close range with an extinguishing agent. To generate the extinguishing agent mist, the nozzle head of the device described in this document has a plurality of outlets, each with a swirling element. This swirling element is set in motion by the pending extinguishing medium pressure and serves the purpose of forming the desired liquid mist. Therefore, the generated liquid mist exits directly on the nozzle head. Effective firefighting by extinguishing agent sufficiently distant from the source of the fire can not be achieved even with the method described in this document or with the device described in this document.

Based on this discussed prior art, the invention is therefore the object of a jet pipe unit for extinguishing agent delivery and a method for forming a extinguishing agent to propose, with which device or by which method a targeted effective fire fighting with relatively low extinguishing agent consumption and especially with greater distance to the source of fire can be done.

The object related to the jet tube unit is achieved according to the invention in that the at least one nozzle is rotationally movable about its longitudinal axis and / or along a circular path concentrically enclosing the axis of rotation.

The method according to the invention for forming an extinguishing agent mist is characterized by:

Providing a high-pressure liquid extinguishing agent, for example water, - A -

Supplying the extinguishing agent to a jet pipe unit, comprising at least one jet pipe with one or more nozzles as the extinguishing agent outlet opening,

- Generating an extinguishing agent jet with a first, essentially the litter width defining beam portion in the form of a focused beam and with a subsequent casting in the section in which the beam increases its rapid increase in velocity over a short distance its cross-sectional area to form the Löschnebels many times in that an extinguishing agent jet rotating about its longitudinal axis is rotated by in-rotation

Displacement of the at least one nozzle of the jet pipe unit and / or the jet pipe unit is generated about an axis of rotation corresponding to the extension of the longitudinal axis of the extinguishing agent jet.

Such a beam tube unit is designed to form a bundled extinguishing agent jet which rotates about its longitudinal axis for its bundling and for stabilizing its trajectory. The rotating extinguishing agent jet is expediently produced by the at least one nozzle of the jet tube or the jet tube unit and / or the at least one jet tube of the jet tube unit and / or the entire jet tube unit being set into a rotary rotational movement about its longitudinal axis. For rotationally driving the jet pipe or the jet pipe unit, a drive device, for example a hydraulic motor, can be used. In addition to the above-mentioned drive, for the production of the rotating extinguishing agent jet, existing internals which guide the extinguishing agent can also be used in the jet pipe. For guiding or directing the extinguishing agent within the jet pipe, for example, the webs projecting from the inner wall thereof or grooves introduced into the inner wall thereof can be used which are designed to be spiral-like following the longitudinal extent of the jet pipe.

The liquid extinguishing agent used to produce the extinguishing agent jet is supplied under pressure to the jet pipe. Typically, the pressure with which the extinguishing agent is supplied to the jet pipe, adjustable, so that the jet pipe according to the respective requirements with the extinguishing agent under a suitable pressure Be is charged. The respective set pressure of the jet pipe supplied extinguishing agent determines the exit velocity of the extinguishing agent jet from the jet pipe or the jet pipe unit in the axial direction. Since the emerging extinguishing agent jet is rotating at the same time, the pressure of the vectoring component of the extinguishing agent jet velocity pointing in the longitudinal direction of the extinguishing agent jet is determined. With regard to its design, the extinguishing agent jet emerging from the jet pipe or the jet pipe unit can be set correspondingly to the respective requirements in the case of fire fighting with reference to the two parameters pressure and rotation. It is assumed that the effective throw of the extinguishing agent jet and the speed of rotation can be used to set the distance of the formation of the extinguishing agent mist desired for fire fighting from the jet pipe unit via the pressure of the extinguishing agent supplied to the jet pipe or the jet pipe unit. It is further assumed that the two aforementioned parameters are in a certain context. By varying the extinguishing agent jet pressure and / or the rotational speed of the jet pipe or of the jet pipe unit, the desired extinguishing agent jet can be readily adjusted by anyone according to the respective requirements.

The extinguishing agent jet generated by such a jet pipe unit is to be addressed as a bundled extinguishing agent jet over a first throwing distance. In its volumetric extent, the desired extinguishing agent mist then forms from the extinguishing agent jet at this first throwing distance over a short distance. Thus, in this jet pipe unit or when using the aforementioned method, the extinguishing agent used for firefighting is bundled over the first litter line and transported lossless to the place of firefighting as far as possible, whereby the extinguishing agent mist itself only at the site of firefighting by a short distance occurring quasi-explosive increase in volume of the extinguishing agent jet is formed or spread.

The tube unit is suitable for the aforementioned reason, especially for combating such fires that can not be controlled from close proximity. To the extinguishing agent beam sufficient To impart throw, the liquid extinguishing agent is typically introduced under high pressure in the jet pipe unit. The pressure actually set depends on the design of the jet tube unit and the desired extinguishing agent jet formation. Although the above-described extinguishant jet configuration can be realized at lower pressures, the jet tube unit will typically be pressurized to pressures of 200 bar, 500 bar, 1000 bar or more. With such, under high pressure extinguishing agent acted on jet tube unit can achieve high extinguishing jet throwing distances, which can be up to 100 m or even more, before the actual extinguishing agent spray spatially forms or propagates almost explosively over a short distance. By setting the rotational speed of the extinguishing agent jet, the extinguishing agent jet can be set up with regard to the design, for example the stability of its trajectory. Due to the rotation of the extinguishing agent beam undergoes stabilization as a result of the twist. By changing the rotational speed, it is possible with constant pressure, to determine the point in which after the first throw of the extinguishing agent beam as a focused beam, this unfolds to form the extinguishing agent fog.

The opening width of the at least one nozzle of a jet pipe of such a jet pipe unit is small in diameter and is typically less than 2 mm. A nozzle cross-section of about 1 mm is preferred and considered sufficient. Nevertheless, other nozzle cross-sectional widths may also be provided. The small diameter nozzles result in lower extinguishing agent consumption. Preferably, the at least one nozzle of the jet pipe unit is formed as an acceleration nozzle and has a first gradually tapered convergent section, which is followed by the smallest diameter of the nozzle. At this portion of the smallest opening width of the nozzle may be followed by a diameter-increasing section. The nozzles may be formed, for example, as Laval nozzles.

When using such nozzles, it is possible to produce an extinguishing agent jet emerging from the nozzle at supersonic speed. If such a high-speed extinguishing agent jet is generated, According to the current state of knowledge, it is assumed that the transition between the laminar-flowing extinguishing agent jet and a turbulent flow promotes droplet formation and thus the formation of the extinguishing agent mist over a short distance.

The at least one nozzle of the jet pipe or of the jet pipe unit can have transverse bores via which additives which are supplied via a suitable rotary feedthrough or which are present at the nozzle can be added to the extinguishing agent. In the case of a jet pipe unit with a plurality of nozzles, it may be provided that only a few nozzles have such an inlet.

In the case of jet pipe units with a plurality of jet pipes, the majority of the jet pipes is typically arranged at a distance from the axis of rotation of the jet pipe unit. Since the extinguishing agent is typically supplied via a rotational feedthrough defining the axis of rotation, the extinguishing agent experiences an acceleration as a result of centrifugal force, so that in this way the extinguishing agent pressure prevailing at the outlet nozzle (s) can be increased. This is dependent on the rotational speed of the jet pipe unit.

In the previously described jet pipes, their tubular bodies and the nozzles forming the extinguishing agent outlet opening were implicitly arranged one behind the other in the axial direction. However, this is not mandatory. The nozzle upstream tube body may also extend at an angle to the longitudinal axis of the nozzle. Such a tubular body thus extends in the radial direction to the rotational movement of such a jet tube unit and typically connects the axially arranged rotary feedthrough with the nozzle arranged at a distance from the rotational axis.

The jet pipe units can be accommodated in an open, for example drum-like, housing in the throwing direction of the extinguishing agent jet in order to avoid a possible risk of injury to the rotating jet tubes.

The invention is based on embodiments below With reference to the accompanying figures. Show it:

1 is a schematic, partially sectioned side view of a jet pipe unit for extinguishing agent according to a first embodiment,

2: the jet pipe unit of FIG. 1 with a modified nozzle design,

3 shows still another nozzle configuration for a jet pipe unit,

4 shows a schematic side view of a jet pipe unit for extinguishing agent delivery according to a further embodiment,

5 is a view of the opening side of the jet pipes of the jet pipe unit of Figure 4,

6 shows a view of a further jet pipe unit corresponding to that shown in FIG. 4 with a jet pipe arrangement which is different from the other.

7 shows a schematic view and insight of a jet pipe unit for extinguishing agent delivery according to yet another exemplary embodiment,

8: a Strahlroheinheit according to another embodiment,

9: a jet pipe unit according to yet another embodiment and

10 shows a schematic representation of the extinguishing agent jet emitted by the jet tube unit according to FIG. 4 and the extinguishing agent mist forming therefrom.

A jet pipe unit 1 according to a first embodiment comprises a jet pipe 2, consisting in the illustrated embodiment of a cylindrical tube body 3 and an output side, torque-connected to the tubular body 3 connected nozzle 4. The tubular body 3 has an extinguishing agent inlet opening. Designs with several extinguishing agent inlet openings are possible. The jet pipe 2 is rotatably supported about its longitudinal axis 5 in a manner not shown. For rotationally driving the jet pipe unit 1, which in this embodiment consists solely of the jet pipe 2, a hydraulic motor 6 with a pulley 7 is used on its drive shaft. A belt 8 serves to transmit the rotational movement of the pulley 7 to the jet pipe 2, for which purpose a belt guide 9 is arranged in the rear region of the tubular body 3 of the jet pipe 2. In its rear region of the tubular body 3 is connected to a generally designated by the reference numeral 10 rotary feedthrough. The rotary feedthrough 10 is used for supplying a liquid extinguishing agent, typically water from the stator side into the interior 11 of the tubular body 3 rotatable about its longitudinal axis.

The nozzle 4 has a section 12, which gradually tapers in a convergent manner towards the nozzle exit, with a circular cross-sectional area, to which the section of the nozzle 4 adjoins, in which the latter has its smallest opening width. This section is identified by the reference numeral 13. In the illustrated exemplary embodiment, a short, slightly widening section adjoins this section as a nozzle outlet. Of course, at this point, nozzles with a different nozzle configuration, for example, be used with a longer Düsenausgangsstrecke.

The jet pipe unit 1 is connected to a non-illustrated high-pressure extinguishing agent supply 14, through which the extinguishing agent - water - with a pressure of more than 500 bar input side of the rotary feedthrough 10 is present. The extinguishant pressure is adjustable to the respective desired formation of the extinguishing agent jet. The extinguishing agent-loaded jet pipe unit 1 is set in rotation for its operation in order to produce a rotating extinguishing agent jet. The formation of the rotating extinguishing agent jet is supported by the length of the tubular body. pers 3, since due to the internal wall friction, the supplied extinguishing agent is already in the cylindrical portion of the tubular body 3 is set in rotation. The rotational speed of the jet pipe 2 is dependent on the desired extinguishing jet configuration, for example its bundling, and may be about 2,000 revolutions per minute. Depending on the fire to be combated and in particular its distance from the jet pipe unit 1, this can also be driven with a lower or higher rotational speed.

The jet pipe unit 1 is typically hinged to a vehicle, with both the extinguishing jet direction and the extinguishing jet discharge angle being adjustable.

FIG. 2 shows, in a further exemplary embodiment, a jet tube unit 1 ', which is constructed like the jet tube unit 1 described for FIG. 1, but which differs from the jet tube unit 1 with respect to its nozzle arrangement. In contrast to the nozzle 4, the nozzle 4 'of the jet tube unit 1' is arranged eccentrically to the longitudinal axis 5 'of the jet tube 2', so that the nozzle constriction 13 'describes a circular path movement as a result of rotation of the jet tube 2' about the longitudinal axis 5 '. The extinguishing jet emerging from the jet tube unit 1 'is to be regarded as hollow-beam-like by its helical configuration.

FIG. 3 shows a further nozzle configuration 15 for a jet pipe unit, for example the jet pipe unit 1 or 1 'or else for one of the jet pipe units described below. The nozzle configuration 15 is a double nozzle with two individual nozzles 16, 16 '. The nozzles 16, 16 'are basically designed like the nozzle 4 and have a first, gradually convergent tapered portion, which is followed by the Düsenengste with circular cross-sectional area. Both nozzles 16, 16 'are arranged at the same radial distance from the longitudinal axis 17 of the jet pipe 18. During operation of the jet pipe 18, as well as during operation of the jet pipe unit 1 ', a hollow jet or a hollow jet-like extinguishing jet is generated.

The nozzles described are exemplified nozzles which are used to accelerate the rotation of the jet pipe into the jet pipe. Perform 10 guided extinguishing agent is used. Due to the high pressure applied by the extinguishing agent supply 14, but also due to the extinguishing agent acceleration within the respective nozzle 4, 4 'or 15, the respective extinguishing jet leaves the nozzle or the jet pipe at high speed. The exit velocity depends on the applied pressure and the configuration of the respective nozzle. The respective emerging extinguishing agent jet may have supersonic speeds. The exit of the extinguishing agent jet at such a high speed supports the extinguishing jet bundling and ensures that the escaping extinguishing agent jet remains concentrated over a longer distance before the desired extinguishing agent mist is formed.

FIG. 4 shows a jet pipe unit 19 according to a further exemplary embodiment which is constructed with respect to the drive and the extinguishing agent supply like the jet pipe unit 1 described above. The jet pipe unit 19 comprises a collector or distributor 21 connected to the rotary feedthrough 20, at which several individual jet pipes 22 are connected with their respective tubular body. Overall, seven individual jet pipes 22 are connected to the collector 21, as can be seen in the front view of FIG. 5 of the jet pipe unit 19. The jet pipes 22 of the jet pipe unit 19 are designed in this embodiment as the jet pipes 2 described for Figure 1. From the illustration of the jet pipe unit 19 according to Figure 5 it is clear that the jet pipe unit 19, a centric jet pipe 22 and six, each with the same angular distance in the radial distance has to the central jet pipe 22 arranged further radiant tubes 22. In the jet pipe unit 19, the entire unit consisting of the collector 21 and the jet pipes 22 is driven in rotation. Due to the radial distance of the outer jet tubes 22 from the axis of rotation of the jet tubes 22, which axis of rotation corresponds to the longitudinal axis of the centric jet tube 22, an extinguishing agent jet is generated with a larger beam diameter than is the case with the eccentrically arranged nozzles described for Figures 2 and 3 , The provision of several jet pipes, each with the same radial distance from the centric jet pipe also allows the transport of a larger amount of extinguishing agent. Due to the radial distance of the outer radiant tubes 22 from the axis of rotation is the Rotation speed of the discharged extinguishing agent jet correspondingly high.

FIG. 6 shows an arrangement of jet pipes 22 'of a further jet pipe unit 19', which is a modification of the jet pipe arrangement of FIG. 5. Also in this embodiment, the individual beam tubes 22 are arranged at the same angular distance from each other. In contrast to the arrangement of FIG. 5 concerning the jet tube unit 19, two jet tubes 22 'are arranged at the jet tube unit 19' at a mean distance from the axis of rotation of the unit.

In the case of radiant tube units which have a plurality of radiant tubes, as described by way of example with respect to the radiant tube units 19, 19 ', the individual radiant tubes 22, 22' can have an outlet valve, in order, if appropriate, to be able to block the extinguishing agent outlet of individual radiant tubes. In this way, a further modification and adaptation of the extinguishing agent jet is possible.

FIG. 7 shows a jet pipe unit 23 according to yet another embodiment, which is constructed in principle like the jet pipe unit described with reference to FIGS. 4 to 6. In contrast to the jet pipe unit 19, 19 ', in the case of the jet pipe unit 23, the outer jet pipes 24 are adjustable relative to the collector 25, as this is indicated in FIG. By adjusting the outer beam tubes 24, in which adjustment the longitudinal axis of the jet tubes 24 is tilted by a few degrees with respect to the axis of rotation of the jet tube unit 23, an extinguishing agent jet can be generated, which rotates about its longitudinal axis and also has a certain conicity. The jet tube unit 23 is shown in FIG. 7 in a position in which the outer jet tubes 24 are adjusted slightly outwards in order to produce a slightly enlarging extinguishing agent jet. Likewise, it is possible to incline the jet pipes 24 inwardly with respect to the axis of rotation.

The jet pipe unit 23 has a telescopic housing 26, which on the one hand to protect the jet pipes 24 and on the other to support the relative to the collector 25 articulated in the region of its rear

End of this mounted jet pipe 24 is used. The outer beam tubes 24 are based on centrifugal force on the inside of the telescopic housing 26 with rotating unit. This contributes to its outer part 27 for this purpose inside a support ring 28. The outer part 27 is relative to the fixed part 27 'of the telescopic housing 26, as indicated by the arrow in Figure 7, adjustable by means of a thread, by a rotational movement of two parts 27, 27 'against each other. The support ring 28 is segmented in a manner not shown. Each segment of the support ring 28 is movable via a plunger 29 in the radial direction to the axis of rotation. By applying a rotational movement to the outer part 27 of the telescopic housing 26, the plunger 29 is pressed in the longitudinal direction of the jet pipe unit 23 in the outer part 27 'in accordance with the slope of between the parts 27 and 27' located thread and consequently the support ring segments, the back of the abut other end of the plunger 29 with a slope moves. An active provision of the support ring segments 28 is not necessary. To secure the two parts 27, 27 'of the telescopic housing 26 against each other serves a non-illustrated in the figures rotation.

Figure 8 shows a Strahlroheinheit 30 according to another embodiment. In principle, the jet pipe unit 30 has, in addition to the jet pipe unit 19 of FIG. 4, a supply and switch-off device 31 which is arranged in the collector 32. The supply and shutdown device 31 serves to connect and / or disconnect individual jet pipes 33. Thus, in the case of the jet pipe unit 30, the extinguishing agent jet to be formed can additionally be modulated or adjusted by means of supply and / or shutdown of individual jet pipes 33. The use of such a supply and disconnection device for connecting or disconnecting individual jet pipes 33 is particularly useful when the jet pipes have at least partially different nozzle shapes. This expands the possibilities of forming the extinguishing agent jet as a function of which jet pipes are switched on and / or off. Such switching on and off can also take place during operation, so that during the operation of the extinguishing agent jet generation it can also be changed in this regard. The jet pipe unit 30 further has a housing 34, which is also provided in the illustrated embodiment as a protective measure. The housing 34 formed from the two annular cylindrical housing parts 35, 36 is coupled to the rotary movement of the collector 32. The housing part 36 is opposite the housing part 35, as indicated by the arrow in Figure 8, movable. The housing part 35 has a feed channel 37, via which an additional medium, for example a gas, such as compressed air, can be injected into the interior of the outer cylindrical housing part 36. By such a measure, the shape of the exiting extinguishing agent jet can be influenced. In particular, this can thereby undergo additional stabilization. The supply of such a carrier gas is preferably swirling. Such a gas, for example compressed air, can in principle also be supplied via the collector 32, for which purpose the supply duct has a connection to a gas line arranged in the collector for this purpose. In principle, an embodiment is also possible in which the collector itself carries openings for the gas outlet. Basically, these gas outlet openings can also be tubes fastened to the collector, which are arranged between the jet tubes 33.

9 shows a further development of the jet tube unit 30. The jet tube unit 38 shown in FIG. 9 is constructed in the same way as the jet tube unit 30, however, unlike the jet tube unit 30, the housing 39 of the jet tube unit 38 is decoupled from the rotary tubes of the header with the jet tubes this is schematically illustrated by the ball bearing 40 in Figure 9.

FIG. 10 shows, in a highly schematized and not to scale representation, the jet tube unit 19 of FIG. 4 when dispensing an extinguishing agent jet 41. As a result of the rotation of the jet tubes 22, the extinguishing agent jet 41 rotates about its longitudinal axis as it leaves the jet tube unit 19, thus extending the axis of rotation of the jet Beam tube unit 19 represents. In a first throw of the extinguishing agent jet, the extinguishing agent jet remains concentrated due to the high exit velocity and the impressed rotation due to the pressure of the pending liquid extinguishing agent. This section of the extinguishing agent jet 41 is identified by the reference numeral 42 in FIG. At this Section 42 of the extinguishing agent beam is followed by a section in which the extinguishing agent jet 42 explosively increases its cross-sectional area over a short distance with a rapid decrease in velocity. This takes place with formation or distribution of smallest extinguishing agent droplets, so that an extinguishing agent mist 43 is formed. The extinguishing agent mist formation is also supported by the dynamic pressure acting as a result of the high exit velocity of the extinguishing agent jet.

It is considered possible that, in the generation of a supersonic extinguishing agent jet, the above-described spread or formation of the extinguishing agent mist is conducive to the transition from laminar flow conditions to turbulent flow conditions.

The described design of the jet pipe unit requires only a small extinguishing agent consumption, which is lower compared to an operation of previously known jet pipe units with formation of an extinguishing agent jet by a multiple. Therefore, extinguishers equipped with such a jet pipe unit, based on the quantity of extinguishing medium entrained, can support active fire fighting considerably longer by extinguishing without having to refill the extinguishing agent supply. The low extinguishing agent consumption is also advantageous in the event that instead of water as extinguishing agent, another liquid extinguishing agent or water are used with an extinguishing agent additive, since the area of the source of fire only by a small amount of the extinguishing agent used - should it not be water - is charged ,

The invention has been described above with reference to some possible embodiments. Without departing from the subject matter of the invention, numerous further embodiments will be apparent to a person skilled in the art without departing from the subject matter of the invention. LIST OF REFERENCE NUMBERS

1, 1 'jet pipe unit 33 jet pipe

2 jet pipe 34 housing

3 tubular body 35 housing part, 4 'nozzle 36 housing part

5, 5 'longitudinal axis 37 supply channel

6 hydraulic motor 38 jet pipe unit

7 pulley 39 housing

8 belts 40 ball bearings

9 Belt guide 41 Extinguishing agent jet

10 rotary feedthrough 42 bundled section

1 1 Interior of the tube body 43 Extinguishing agent mist

12 convergent section, 13 'section with smallest

Nozzle diameter

14 Extinguishing agent supply

15 nozzle configuration, 16 'nozzle

17 longitudinal axis

18 jet pipe, 19 'jet pipe unit

20 rotary feedthrough

21 collectors, 22 'jet pipe

23 jet pipe unit

24 jet pipe

25 collectors

26 telescope housing

27 outer part

27 'fixed part

28 support ring

29 pestles

30 jet pipe unit

31 Connection and disconnection device

32 collectors

Claims

claims

1. jet pipe unit for extinguishing agent delivery, comprising at least one pressurizable extinguishing agent acted upon jet pipe (2, 2 ', 18, 22, 22', 24) with a tubular body (3) having a Löschmitteleinthttsöffnung and with one of at least one nozzle (4, 4 ', 16, 16') of the extinguishing agent outlet, characterized in that the at least one nozzle (4, 4 ', 16, 16') about its longitudinal axis (5) and / or along a

Rotation axis concentrically enclosing circular path is rotationally movable.

2. jet pipe unit according to claim 1, characterized in that the at least one nozzle (4, 4 ', 16, 16') with the tubular body (3) of the

Beam pipe (2, 2 ', 18, 22, 22', 24) is connected torque-locking and a drive means for rotatably driving the jet pipe (2, 2 ', 18, 22, 22', 24) and the extinguishing agent by passing rotary feedthrough (10 , 20) are provided for supplying the extinguishing agent in the tubular body.

3. jet pipe unit according to claim 2, characterized in that the extinguishing agent at a pressure of more than 200 bar, in particular of more than 500 bar at the extinguishing agent inlet opening of the jet pipe (2, 2 ', 18, 22, 22', 24) is present.

4. jet pipe unit according to one of claims 1 to 3, characterized in that the at least one the Löschmittelausthtts- opening of the jet pipe forming nozzle (4, 4 ', 16, 16') is an acceleration nozzle.

5. jet pipe unit according to claim 4, characterized in that the nozzle (4, 4 ', 16, 16') in a first portion in the flow direction of the flowing extinguishing agent has a convergent taper (12), at which tapered portion (12) itself the smallest diameter of the nozzle (4, 4 ', 16, 16') connects, which is smaller than 2 mm, in particular about 1 mm.

6. jet pipe unit according to one of claims 1 to 5, characterized in that the jet pipe unit (1, 1 ') has a rotationally driven about its longitudinal axis jet pipe.

7. jet pipe unit according to claim 6, characterized in that the jet pipe (2 ') at least one eccentrically to the longitudinal axis (5') of the jet pipe (2 ') arranged nozzle (4').

8. jet pipe unit according to one of claims 1 to 7, characterized in that the jet pipe unit (19, 19 ', 23) a plurality of spaced apart from the axis of rotation and expediently at the same angular distance from each other arranged jet pipes (22, 22', 24).

9. jet pipe unit according to claim 8, characterized in that the jet pipes (22, 22 ', 24) are connected with their water inlet opening to a passing through an extinguishing agent rotary feedthrough (20) connected to the collector (21, 25).

10. jet pipe unit according to claim 8 or 9, characterized in that one or more of the spaced apart from the axis of rotation jet pipes (24) for adjusting the diameter of the extinguishing agent jet with respect to the orientation of its longitudinal axis to the axis of rotation of the jet pipe unit (23) are adjustable.

11. jet pipe unit according to one of claims 8 to 10, characterized in that the individual jet pipes (33) to a supply and shut-off device (31) through which an inflow of extinguishing agent in the jet pipe (33) can be switched on or off, are connected.

12. jet pipe unit according to one of claims 8 to 1 1, characterized in that the jet pipe unit has a the individual jet pipes (24, 33) enclosing housing.

13. jet pipe unit according to claim 12, characterized in that the housing (34, 39) has a feed channel (37).

14. A method for forming an extinguishing agent mist, characterized by: providing a pressurized liquid extinguishing agent, for example water,

- supplying the extinguishing agent to a jet pipe unit, comprising at least one jet pipe with one or more nozzles as extinguishing agent outlet opening, - generating an extinguishing agent jet (41) having a first, substantially the throw defining beam portion (42) in the form of a focused beam and with a in Throwing direction subsequent section in which the beam with rapid decrease in velocity over a short distance its cross-sectional area for forming the Löschnebel (43) increased by a multiple by an about its longitudinal axis rotating extinguishing agent jet by rotating the at least one nozzle of the jet pipe unit and / or the jet pipe unit is generated about an axis of rotation corresponding to the extension of the longitudinal axis of the extinguishing agent jet.

15. The method according to claim 14, characterized in that the extinguishing agent is provided with a pressure of at least 200 bar, in particular of more than 500 bar.

16. The method according to claim 14 or 15, characterized in that the extinguishing agent exits from the at least one nozzle at high speed, in particular at supersonic speed.