WO1995032762A1 - Fire extinguishing device with an aerosol-producing fire-extinguishing generator - Google Patents

Abstract

The proposed fire extinguishing device has an aerosol-producing fire-extinguishing generator, in which among other things an aerosol-producing charge, mixture or the like is housed in an elongated housing and an ignition device allocated to the charge or mixture. To reduce the number of different types of generators which must be stocked for different eventualities and to simplify and reduce the cost of mounting them, for example, on walls, interior surfaces or in fire extinguishers, a receptacle unit (1) is provided with at least one standardised connection piece for generators (3) of identical or differing power.

Description

Fire extinguishing device with an aerosol generating fire extinguisher

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

From EP-A-0 569 025 a fire extinguishing device is known which shows a fire extinguishing generator, the cylindrical housing of which contains at least one set which generates an aerosol. This set is produced as a shaped body. It contains components from which an aerosol is formed during combustion, which can be used to extinguish fires e.g. in transport facilities or closed building rooms. It is provided that the performance of each extinguishing generator is designed in accordance with the different requirements in the individual case. This means that in practice a large number of different generators have to be manufactured and kept in stock. Furthermore, there is the difficulty that these known generators do not work in the desired simple manner on e.g. Ceilings of rooms, in housings of fire extinguishing devices or the like can be mounted.

The object of the invention is to remedy this. This object is achieved by the training according to the characterizing part of claim 1. It is thus possible in an advantageous manner with extremely simple means to adapt the fire extinguishing device to the most varied of applications by starting from a receiving device (carrier body) which has standardized connection dimensions which correspond to those of the standardized generators. Regardless of the application of the recording device, i.e. e.g. mounting on ceilings of rooms or arrangement in fire extinguishing housings, the use of a single generator type is possible. This enables simple, inexpensive application in the manner of a module.

In this modular embodiment according to claim 2, preference is given to a device in which at least two or more fire extinguishing generators are provided. This design has the main advantage that it it is possible to trigger the individual generators simultaneously, but also one after the other in time, the time intervals, for example in the event of a smoldering fire, being triggered automatically in accordance with the respective signals from the associated sensors. For this purpose, the generators are provided with electrical ignition devices, the structure of which is fundamentally known. Instead, percussion detonators, detonators or the like which are known per se can also be provided for triggering by hand.

According to claim 3, the receiving device can e.g. be designed as a dome-shaped body, on which the preferably two or more generators are arranged in a radial manner and thus cover different surfaces when arranged on the ceiling of a room. With the formation of disk, plate and strip-shaped support bodies, a particularly small construction of the fire extinguishing devices is achieved, preferably with several generators. In principle, however, it is also possible to arrange the generators in accordance with claim 4, which proves to be particularly advantageous if the fire extinguishing device is provided in a freestanding manner.

A further particularly preferred embodiment is specified in claim 5, thereby simplifying and rationalizing maintenance and also making it possible to re-equip a used fire extinguishing device (fire extinguisher) economically. Depending on the circumstances of the individual case, it may be sufficient that only the generator (s) used or the entire receiving device with the preferably several generators is replaced. In one embodiment, in which the receiving device is made in one piece with the outer housing, e.g. is produced by deep drawing, then only the generator (s) to be replaced are replaced.

In order to avoid an undesirably high heating of the outer contact surface of the outer housing when using the fire extinguishing devices, in particular manual fire extinguishers, the design according to claim 6 is provided. This spacing of the preferably several generators from the outer housing of the fire extinguishing device surrounding them achieves thermal insulation. For the directed delivery of the aerosol into the flame, the embodiment according to claim 7 proves to be advantageous; the outlet opening at the front end can be designed as a nozzle, slot or the like.

Instead, the outer housing can also be provided with a cylindrical extension. However, the embodiment according to claim 8 is preferred. This is particularly suitable for quasi-stationary use, for example by is temporarily housed in the hold of a truck, a railroad car or the like. Another application is e.g. possible in the event of forest fires by setting up these devices as required to protect areas that are not yet burning but are at risk, with the triggering again preferably being effected electrically by means of an appropriate sensor system. In principle, however, this extinguishing device can also be attached to ceilings or walls of warehouses, cargo holds in ships or the like.

A further advantageous embodiment of this extinguishing device is specified in claim 9. The outflow openings for the aerosol in the lower base area of the fire extinguishing device can be designed as circular openings. However, slot-shaped openings are preferred, which extend in particular in the longitudinal direction of this base region.

In order to achieve an even better radial outflow of the aerosol, the embodiment according to claim 11 has proven to be advantageous, in which the floor insert acts as a deflection device for the aerosol.

Instead of the preferred conical configuration according to claim 8, a pyramidal shape can also be provided in principle. In both cases it is achieved that the stability of this fire extinguishing device is increased considerably, ie the required tilting moment, for example in the form of gusts of wind, is correspondingly increased for knocking over these fire extinguishing devices positioned in the terrain. The invention is explained in more detail below with reference to exemplary embodiments in the drawings. Each show in a more or less schematic representation

Fig. 1 is a fire extinguishing device for mobile use, partially in

Longitudinal section,

2 the view according to arrow X in FIG. 1,

3 shows a fire extinguishing device for quasi-stationary use,

4 shows the view according to arrow X in FIG. 3,

5 shows a fire extinguishing device with yet another generator arrangement,

6 shows a variant of FIG. 1,

7 shows a further variant of FIG. 3,

Fig. 8 shows a further variant of the arrangement of gas generators and

9 shows a cross section along the line A-B in FIG. 8.

1, a hand-held fire extinguisher, has the receiving device 1, which is designed as a plate-shaped carrier 2. In this carrier plate 2 - as more clearly shown in Fig. 2 - three gas generators 3 are inserted, one of which is shown in section, the other is shown in the view and the other generator is omitted. The generators in the preferred form have a circular cylindrical housing 12, are inserted into corresponding circular openings 12 'of the carrier plate 2 serving as connections and are supported with their projecting edge 4 on the carrier plate 2. The mounting of the generators 3 in the carrier plate 2 is explained in more detail with reference to FIG. 2. In the aerosol-generating generator 3, starting from its front, outlet-side end 5, are known The spacer ring 6, the coolant 7 for the aerosol resulting from the erosion, the further spacer sleeve 8, the aerosol-producing set 9 produced by casting, pressing or extrusion and the spring element 10 are arranged one after the other. The base 5 is also provided in a known manner with outlet openings for the aerosol, not shown. The

Spacer rings or sleeves 6, 8 are made of a material that is temperature resistant when the set 9 burns. Steel is preferably used for this, but brass can also be provided, for example. The housing 12 of the generator 3 is closed at its end facing away from the base 5 with the cover 11, which at the same time serves to receive and hold the ignition device 13. This is designed as electrical ignition, but depending on the application, it could also be triggered manually, e.g. in the form of a blow or tear-off igniter (see FIG. 6). The outer edge 14 of the carrier plate 2 is connected to the outer housing 15 of the fire extinguishing device, e.g. fixed by brazing or detachable, for example by screwing. The distance 17 is provided between the housing 12 of the generators 3 and the inner surface 16 of the outer housing 15.

The outer housing 15 is cylindrical in its area 18 surrounding the three generators. This area 18 is followed in the outflow direction of the aerosol by the frustoconically tapering part 19, at the front end of which the outflow opening 20 is provided. The outer housing 15 is double-walled, i.e. it has a heat-insulating space 21 between its two walls. Furthermore, the outer housing 15, each shown in the view, has the handle 22 and the transport and guide handle 23. Both handles are preferably made of heat-insulating material, e.g. Plastic and possibly still made hollow.

FIG. 2 shows, in the view according to arrow X in FIG. 1, a schematic representation of the outer housing 15 with the carrier plate 2, in which the three aerosol-generating generators 3 are inserted. These have the cover 11 with the schematically indicated ignition 13, the cover 11 in Housing 12 of the generator 3 is held by means of the locking ring 24. The generators 3 are in turn attached to the plate-shaped carrier 2, for example by means of the retaining tabs 25 screwed onto the carrier plate 2, which press the protruding edge 4 of the generators 3 against the carrier 2.

This arrangement has the advantage that fire extinguishing devices can be designed in a modular design, assuming a uniform, standardized generator type, the number of generators to be used per device being determined once in accordance with the types of power to be offered. The generators 3 can be easily removed with their carrier plate 2 and can be replaced by a new unit consisting of plate and generators. Instead, it can also be provided that only individual generators are exchanged for new ones. This modular structure enables the fire extinguishing devices to be manufactured very economically. The same applies if these are to be provided with new generators after use or after the required very long operating times have expired. Without basically departing from the advantageous modular design, provision could also be made, e.g. to produce a second type of generator with a greater length, in which the set 9 and the coolant 7 have a correspondingly greater length with the same outer diameter and thus a greater power output (aerosol generation) is made possible without the connection dimensions or possibilities 12 'thereby influenced between the carrier 2 (receiving device 1) and the generators 3, ie are changed and thus standardized. This applies at least essentially to the other components, e.g. the spacer sleeves 6, 8 of the generators 3.

According to the modular design, the fire extinguishing device according to FIG. 3 has the same gas generators 3 as in FIGS. 1 and 2, which are therefore not explained again here. Here, too, the outer housing 15 is cylindrical in its area 18 surrounding the gas generators, and indeed double-walled with an enclosed cavity 21. Furthermore, the distance 17 is also provided here between the generators 3 and the outer housing 15. Closes the cylindrical region 18 of the outer housing 15 the area 26, which is designed here as a truncated cone, approaches the outflow end. Between the area 18 and the area 26, the intermediate floor 27 with the aerosol passage openings 28 is provided. In the frustoconical area 26, the slit-shaped outflow openings 29 are also provided, which run parallel to the cone surface line and thus also allow the aerosol to escape to the side, if this fire extinguishing device is set up, for example, in a storage room, an air cargo space or the like. At its other end, this fire extinguishing device also has a heat-insulating handle 30 shown in the view.

FIG. 4 shows a view corresponding to the arrow X in FIG. 3 and is identical in its inner part to FIG. 2, the circlips 24 having been omitted to simplify the drawing. In addition, the frustoconical region 26 of the outer housing 15 with the slot-shaped outflow openings 29 is provided here.

5 shows yet another arrangement of the generators, in which the sleeve-shaped support body 2 'is shown in section and the view of the generators 3 which are arranged symmetrically distributed and extend in the radial direction. The carrier body 2 also has the ring 4 shown in the view for fastening the fire extinguishing device e.g. on the ceiling of a room to be protected.

The parts of the fire extinguishing device which are thermally stressed by the burning of the aerosol generating set are made of a correspondingly temperature-resistant material, e.g. Steel made. Depending on the geometry and requirements, this can e.g. Turned, pressed or sheet metal parts.

FIG. 6 shows a variant of a hand-held fire extinguisher according to FIG. 1, in which the gas generator 3 'shown in longitudinal section has a reduced power and, accordingly, also a smaller axial length compared to the generator 3 shown in the view, in that the aerosol generating set 9' un accordingly are designed for the coolant T with a smaller axial height or thickness. In contrast to FIG. 1, a manually operable ignition device 13 'is also provided, which is connected to the Cover 11 is held. The ignition device 13 'has the cover cap 32, which can be unscrewed for the purpose of triggering the generator 3', so that the tear line underneath for the firing pin of the ignition device 13 'is actuated and the ignition can thus be triggered. The ignition device 13 'projects with its tubular end 33 into the coaxial recess 34 of the set 9' and is provided with radial openings (not shown) in order to bring about a radial ignition of the set 9 '. Otherwise, the further structure corresponds to that of FIG. 1, so that reference is made to the explanations given there.

In the variant of FIG. 3 shown in FIG. 7, a generator 3 ′ with reduced power and axial length is also shown, but is triggered by means of the electrical ignition device 13. Here, too, the front end 33 protrudes into the coaxial through bore 34 of the aerosol-generating set 9 'at a lateral distance and effects the radial ignition of the set 9'. Furthermore, the conical bottom 31, also called bottom plate, is indicated schematically, which causes a lateral deflection of the aerosol and thus promotes its outflow through the slit-shaped outflow openings 29. Otherwise, the structure corresponds to that of FIG. 3, so that reference is also made to the explanations there.

In the arrangement shown in plan view in FIG. 8, the receiving device 1 is designed as a dome-shaped or shell-shaped carrier 2, as can be clearly seen from the cross section AB according to FIG. 9. Here, too, the generators 3 are arranged at least substantially perpendicular to the carrier 2. Likewise, the generators 3 are inserted through circular openings 12 'in the carrier 2 and rest on the latter with their projecting edge 4 and are fastened to the carrier 2, for example in accordance with FIG. 4. Instead, in individual cases it may also be sufficient to press the gas generators 3 into the openings 12 'with a slight press fit until their edge 4 stops. The receiving device 1 is fastened to the schematically indicated ceiling 35 by means of the screws 36, which are indicated by dash-dotted lines. The outlet openings for the outflow of the aerosol from the generator 3 are indicated in FIG. 8 by way of example in the case of a generator as circular holes 37 in the base 5. As can be easily recognized, a simple exchange of the generators 3 with new ones with the same or different output is also possible here, since here too, due to the modular construction, ie unchanged outer diameter of the generators 3, their mounting in the openings 12 ′ of the receiving device 1 is standardized.

Finally, it is noted with respect to FIG. 9 that this could also be a curved lug-shaped or strip-shaped carrier 2, in which the generators 3 are inserted next to one another. Likewise, the carrier 2 could also be straight, i.e. strip-shaped and attached to the ceiling 35.

Claims

Claims 1. Fire extinguishing device with an aerosol-generating fire extinguisher generator, in which, among other things, an aerosol-generating set, mixture or the like is arranged in an elongated housing and an ignition device is assigned to the set, mixture or the like of the generator, characterized in that a receiving device (1 ) is provided which has at least one connection possibility for generators (3) of the same or different power. 2. Fire extinguishing device according to claim 2, characterized in that the receiving device (1) is provided with identical connection options for at least two generators (3) of the same or different power, which can be triggered simultaneously or in succession. 3. Fire extinguishing device according to claim 1 or 2, characterized in that the receiving device (1) is designed as a disk, plate, cover, strip, dome, ring-shaped or the like. Carrier body (2,2 ') and at least in The at least one generator (3) is arranged substantially perpendicular to this. 4. Fire extinguishing device according to claim 1 or 2, characterized in that the receiving device (1) is designed as a disc, hollow cylinder or the like. From the lateral surface of which at least one generator (3) is arranged laterally. 5. Fire extinguishing device according to one of claims 1 to 4, characterized in that the receiving device (1) with the at least one generator (3) is arranged in an outer housing (15), the receiving device (1) with the at least one generator (3rd ) from the Outer housing (15) or the at least one generator (3) can be removed from the receiving device (1) and exchanged for a new receiving device (1) with at least one new generator or at least one new generator (3) of the same or different power. 6. Fire extinguishing device according to claim 5, characterized in that the outer housing (15) in the region of the at least one generator (3) is elongated, preferably cylindrical, and between the outer surface of the generator (3) and the inner surface of the outer housing (15) a distance (17) is provided. 7. Fire extinguishing device according to claim 6, characterized in that the elongated part (18) of the outer housing (15) - viewed in the outflow direction of the aerosol - is followed by a frustoconically tapering part (19). 8. Fire extinguishing device according to claim 6, characterized in that the elongated part (18) of the outer housing (15) - viewed in the outflow direction of the aerosol - is followed by a preferably frustoconically widening section (26). 9. Fire extinguishing device according to claim 8, characterized in that outflow openings (29) for the aerosol are arranged in the region of this section (26). 10. Fire extinguishing device according to claim 9, characterized in that these outflow openings (29) are slot-shaped. 11. Fire extinguishing device according to claim 9 or 10, characterized in that the frustoconically widening section (26) in the region of its front end has an inwardly directed concave, conical or the like bottom (31). 12. Fire extinguishing device according to one of claims 6 to 11, characterized in that the outer housing (15) is double-walled at least in the region of the at least one generator (3). 13. Fire extinguishing device according to claim 12, characterized in that a thermally insulating material is accommodated in the empty space (21) between the two walls of the outer housing (15).