WO2006074648A1

WO2006074648A1 - Spray nozzle and swirl nozzle for fire fighting installations and temperature-actuated triggering device

Info

Publication number: WO2006074648A1
Application number: PCT/DE2006/000042
Authority: WO
Inventors: Robert Höhne
Original assignee: Hoehne Robert
Priority date: 2005-01-13
Filing date: 2006-01-13
Publication date: 2006-07-20
Also published as: DE112006000586A5; DE102005001717A1

Abstract

The invention relates to a swirl nozzle, especially for fire fighting installations, which comprises a nozzle base (3) having a nozzle opening and at least one swirl piece (1, 2), inserted in an inner cavity, for swirling a liquid. A valve device having a sealing element (12) is mounted on the outlet end or the inlet end of the nozzle. Said valve device, in a first position, prevents the inlet of liquid into the nozzle base or the discharge from the nozzle base and, in a second position, allows a corresponding inlet or discharge. Upon displacement from the first position into the second position, the valve device has a defined range of displacement in which the inlet of liquid into the nozzle base or the discharge from the nozzle base is prevented. A triggering device (8) is temperature-actuated and cooperates with the sealing element of the valve device in such a manner that in the non-actuated state in the first position of the sealing element it exerts a retaining force against a liquid pressure exerted on the sealing element when used and prevents the displacement of the sealing element while allowing the displacement of the sealing element when actuated. The swirl piece or group of several swirl pieces is mounted in the interior cavity in such a manner that at least in the actuated state of the triggering device it/they can be displaced in the axial direction of the nozzle base, thereby displacing the sealing element into the second position.

Description

Spray nozzle and swirl nozzle for firefighting systems and temperature-dependent triggering device for this purpose

The present invention relates to spray nozzles, in particular swirl nozzles or sprinklers, in particular for firefighting systems and a temperature-dependent actuatable triggering device for this purpose.

Swirl nozzles for firefighting systems z. B. in building or plant fire protection are known per se. Such swirl nozzles are disclosed in the form of single, dual and triple swirl nozzles which produce one or a corresponding number of spray cones. The water misting can with such nozzles in the low pressure range, for. B. can already be achieved from a water pressure of 2 bar, the water by spraying into the smallest drops and aerosols developed a greater extinguishing effect as a direct jet of water. The atomization achieves a high extinguishing agent density and spread, which, compared with a conventional sprinkler system, makes it possible to reduce the water storage and the amount of extinguishing waste water produced. Due to the latter effect, significantly lower damage in buildings or systems due to extinguishing waste water can be expected in the case of application. Another advantageous effect of water misting is that the water mist due to an over-negative pressure effect of the vortex zone of the

Mist Area Fumes and other pollutants in the air bind to form white smoke, which has less harmful effects on living things, enabling improved escape and rescue at the source of the fire. The use in the low-pressure area offers, in addition to the aforementioned advantages of water misting in view of the better extinguishing effect, the further fundamental advantage that the system technology for the supply of extinguishing water and the required water storage due to the lower water pressures and the lower extinguishing water consumption can be made significantly smaller, easier and cheaper.

The basic design and functional description of a swirl nozzle for generating a spray cone goes back to DD 116398.

A twin or twin nozzle in which two concentric spray cones are produced is in DE

20103812 Ul described and a triple or. Drillingsdüse is known from DE 20114923 Ul.

The common principle of these vortex nozzles for water misting is that for each spray cone a twisting piece in a conically tapering

Swirl housing cavity is arranged and one or more swirl grooves are spirally incorporated into the outer jacket of the swirl piece, accelerated by a jet of water entering the nozzle and is set in a swirling motion, which develops at the outlet in the region of a head portion of the nozzle into a fine spray.

A typical type of a generic twin nozzle 100 for generating spray cones, as is known, for example, from DE 20103812 U1, is shown in FIG. This swirl nozzle consists of an inner swirl piece 1, which is arranged in a tapered inner bore 21 of a central swirl piece 2, which in turn in a tapered inner bore 31 of a nozzle or. Swirl housing 3 is arranged. These components are firmly connected to each other by, for example, individually screwed together via threads or braced against each other by a threaded ring, etc. The swirl grooves 4 are helical or. formed helically in the outer circumferential surfaces of the inner and middle swirl piece and extending in the direction of the head or exit end A of the nozzle 100. At the outlet end A of the central swirl piece 2 is a cylindrical projection 22 with a collar 23 is provided, which extends with a gap through a central bore 32 of the swirl housing 3. By this arrangement, an outer liquid shield with less atomization is formed in this nozzle. The cylindrical projection 22 is further provided with a central bore 24 which allows the exit of the finer spray from the space between the inner bore of the central swirl piece 2 and the inner swirl piece 1 at the head of the swirl nozzle. At the water entrance end B of the nozzle, a filter 5 is fixedly positioned to prevent the entry of foreign matter and dirt into the nozzle.

With regard to the generation of the spray, the swirl nozzle according to the invention is based on the same principle of operation as the aforementioned nozzles according to the prior art so that it is not further discussed here and on the structural details. Rather, the contents of the cited documents for the purpose of disclosing these principles of action and structural details are included here. In contrast, the invention is concerned with the

Modification of such swirl nozzles with regard to the initiation of the spraying process.

The above-mentioned known swirl nozzles do not have their own triggering mechanism and are therefore installed in a fire protection system whose pipeline network is only filled up to separate tripping valves with water. Typically, a fire protection system comprises a large number of spray nozzles, which are distributed over the space or building area. The separate trigger valves can be located inside or outside the extinguishing area and thus define different extinguishing sections. Triggering of the trigger valves therefore always takes place for a complete extinguishing section - a single triggering of a swirl nozzle is not possible or requires an extremely complex installation, in which each valve forms its own extinguishing area. However, the inevitable triggering of all spray valves of a quenching area leads to limited sources of fire greater water consumption and greater damage from the extinguishing wastewater. Furthermore, the control of the triggering is problematic when the trigger valves are outside the extinguishing area. To solve these problems, for example by DE 19533636 has been proposed to equip a fire protection system with low-pressure swirl nozzles according to the principle described above and the line system to the mouth or. Opening of the nozzles should always be pressurized. At the individual swirl nozzles a per se known from the conventional sprinkler systems or water turbulence individual or single release was provided. This individual release is shown in FIG. 2 and consists of a sealing body 9, which in the region of the outlet end of the swirl nozzle 100 at the nozzle or. Swirl housing 3 rests and the

Outlet opening 32 by a centering pin 91 and an axial seal 92 tightly seals. A yielding at a predetermined release temperature Andruckkörper in the form of a liquid-filled glass piston 94 presses the sealing body 9 against the housing 3 by being supported with its the sealing body remote from the axial end of a connected to the housing support member 95. Upon reaching the release temperature, the glass piston 94 ruptures, so that the sealing body 9 is pushed outwards under the pressure of the water present in the nozzle up to the nozzle opening and the water emerges from the nozzle opening 32 with the formation of the spray. The force required to hold the sealing body 9 with respect to the water pressure is applied by a clamping screw 96, via which the glass bulb is pressed with prestress against the sealing body.

The many disadvantages of this solution are listed below:

Faulty releases due to mechanical damage of the sensitive pressure body are very easily possible; - The support member, if it remains after the triggering at the nozzle, affects the formation of the spray cone negative; the pressure body brings the total counterforce to seal the nozzle against the water pressure and is thus heavily loaded - an increase in water pressure is possible only within narrow limits and the seal is, as long as it is arranged at the nozzle opening as in DE 19533636, and exposed for long periods the environmental influences of the respective environment and can therefore z. B. change under temperature, light pollutants and lose the sealing effect; the triggering mechanism is axially very large and filigree and is considerably above the nozzle and is therefore not only expensive to install on site but in installations in the living or entertainment area, where visibility of the extinguishing equipment is unacceptable, even problematic to disguise, without affecting the function; the entire nozzle is constantly exposed to the particular extinguishing agent, in particular in the functional areas responsible for the turbulence, which leads to corrosion or prolonged periods of time. Can cause deposits of contaminants, which can affect the reliability; - An application of this triggering mechanism on twin or triplet nozzles is difficult; Triggering of the nozzle is only possible by heat development in case of fire, which in case of smoldering fires or fires in the initial stage with heavy smoke but (still) low heat usually leads to significant impairment and injury to living things and property damage before the fire protection system is ever activated. Furthermore, WO 03/105963 A1 discloses a temperature-dependent actuatable triggering device for sprinklers and nozzles constantly under pressure of an extinguishing agent, in which a cover plate is provided by means of a soldered or glued connection is attached by a melt solder or a heat-sensitive adhesive to an end face of a nozzle body and closes an outlet opening of the nozzle. Upon reaching the melting temperature, the melting solder or the adhesive melts and the cover plate is replaced by the

Extinguishing agent pressure if necessary is thrown over a pin inserted into the outlet channel of the nozzle or a pin connected to a sealing element which closes an inlet opening of the nozzle, and releases the outlet opening.

The disadvantage of this solution is the fact that the strength of the soldering or. Adhesive bond at Löschmitteldrücken that occur in the usual applications of extinguishing systems, is not guaranteed and over the course of the expected reduction in adhesive forces at the solder or splice increases the risk of false triggering. Furthermore, this solution is not applicable to swirl nozzles with multiple spray cones.

The object of the invention is to provide a spray nozzle, in particular a swirl nozzle or a sprinkler for firefighting systems, which has an individual or individual release and is improved with respect to one or more of the disadvantages described above. The object of the invention is also general

To suggest improvements to the temperature-dependent triggering device for such spray nozzles.

To achieve this object, the invention provides a swirl nozzle according to claim 1, a spray nozzle according to claim 13 and a temperature-dependent actuatable triggering device according to claim 24 in proposal. Preferred embodiments are given in each case in the dependent claims. The invention therefore proposes a swirl nozzle, in particular for firefighting systems, with a nozzle body having a nozzle opening and at least one swirl piece inserted into an inner cavity Swirling a liquid, a valve device with a sealing element, which prevents the entry of the liquid into the nozzle body or the exit from the nozzle body in a first position and in a second position 5 allows this and a movement from the first position to the second position has defined range of motion, in which the entry of the liquid is prevented in the nozzle body or the exit from the nozzle body, and a temperature-dependent operable

.0 tripping device associated with the sealing element of

Valve device cooperates, such that in the non-actuated state in the first position of the sealing element, a holding force against a force acting on the sealing element in use fluid pressure

L5 and prevents the movement of the sealing member, and in the actuated state, the movement of the sealing member permits, wherein the swirl piece or a unit of a plurality of swirl pieces in the associated inner cavity is arranged so that it at least in the actuated state of the triggering device in axial Direction of the nozzle body is movable and moves in this movement, the sealing element in the second position.

The invention accordingly also encompasses a spray nozzle, in particular a swirl nozzle or sprinkler for firefighting systems, having a nozzle body with a nozzle opening, a valve device with a sealing element which prevents the liquid from entering the nozzle body or the outlet from the nozzle body in a first position and a second position 0 allows this, and a temperature-responsive triggering device with a holding element, which cooperates with the sealing element of the valve device, such that it exerts a holding force against a force acting on the sealing element in use 5 fluid pressure in the non-actuated state and this in the holds first position, and in the actuated state, the movement of the sealing element in the second position permits, wherein the Retaining element of the triggering device is positively connected to the nozzle body in the non-actuated state via a material which is able to change its consistency from a predetermined temperature and thereby brings the triggering device in the actuated state by releasing the positive connection.

The invention therefore further comprises a triggering device for spray nozzles, in particular swirl nozzles or sprinklers for firefighting systems, which can be actuated in a temperature-dependent manner, with a base element which is attached to a nozzle body of the sprinkler or the like. the spray nozzle is attachable, and a holding element which cooperates in use with a sealing element of a valve device of the sprinkler or the spray nozzle, wherein the holding element is positively connected to the base member via a material which is able to change its consistency from a predetermined temperature and thereby the positive connection releases.

In the following the invention is based on preferred

Embodiments described in detail and with reference to the figures. Show:

Fig. 1 shows a cross-section through a twin nozzle for producing spray cones according to the prior art; Fig. 2 a cross section through a swirl nozzle for

Producing a spray cone of the prior art with an individual triggering mechanism;

Fig. 3A / B a cross section through a twin nozzle according to the invention according to a first embodiment in the un-triggered state and in the tripped state;

Fig. 4 is a schematic representation of a detail of the triggering device of the twin nozzle of FIG. 3;

Fig. 5A / B show a cross section through a twin nozzle according to the invention according to a second embodiment in the unreleased state and in the tripped state; Fig. 6A / B show a cross section through a twin nozzle according to the invention according to a third embodiment in the unreleased state and in the tripped state;

Fig. 7A / B / C a cross section through a single nozzle according to the invention according to a fourth

Embodiment in the untripped state and in the tripped state and in a detail view of the detail "C" (Figure 7C).

8 shows a cross section through a twin nozzle according to the invention in a non-triggered state according to a fifth embodiment;

Fig. 9 is a plan view of the triggering mechanism of the nozzle of FIG. 8th.

Fig. A cross-section through a triggering device according to the invention, which is attached to a nozzle body of a nozzle.

Fig. 11 shows a cross section through a modified release device according to the invention, which is attached to a nozzle body of a nozzle.

Figures 1 and 2 have already been explained in detail at the beginning. They illustrate the basic structure of generic swirl nozzles for fire fighting systems in terms of the function and structure of the elements of the nozzle, the formation of the

Nebulization or the spray cone (s) are used and which can also be used in the low pressure range. The swirl nozzle according to the invention can make use of the known structures in this regard and is not limited to any particular detail solution. Rather, the characteristic elements of the invention are basically in the triggering and thus in connection with these or other known embodiments relating to the nebulisation of liquids and partly also in connection with sprinkler nozzles, which dispense with a turbulence, so that a further explanation of the Nebulization and the structural features used for this purpose is omitted.

The Fig. FIG. 3 shows a cross-section through a twin nozzle according to the invention according to a first embodiment, which, with regard to its construction, insofar as it serves for nebulization, corresponds to the one shown in FIG. 1 is similar, so that the comparable or. corresponding features are identified by the same reference numerals. In the following, therefore, the differences are mainly discussed. FIG. 3A shows the nozzle in the untripped condition and FIG. 3B shows the nozzle in the triggered, ie ready to spray state.

The twin nozzle 100 according to the invention for generating spray cones according to FIG. 3 comprises an inner, tapered swirl piece 1, which is arranged in a tapered inner bore of a central swirl piece 2, which forms an inner cavity 21 and abuts axially on a projection 25 of the inner bore 21 and thereby fixed in the axial position relative to the central swirl piece 2. The middle swirl piece 2 has an also tapered outer contour and in turn is arranged in a tapered inner bore of a nozzle or swirl housing 3, which forms a further inner cavity 31. The tapered inner cavity 31 opens at the head or exit end A of the nozzle 100 in a central bore 32, which forms the nozzle opening or mouth. Spiral grooves 4 are helical or. formed helically in the outer peripheral surfaces of the inner and middle swirl piece and extending in the direction of the head or exit end A of the nozzle 100. At the exit end A of the central swirl piece 2, a cylindrical projection 22 is provided with a collar 23, the central bore 32, which forms the nozzle opening or mouth, can pass through with a gap. The cylindrical projection 22 is further provided with a central bore 24, the outlet of the spray from the space between the inner cavity 21 of the central swirl piece 2 and allows the inner swirl piece 1 at the head of the swirl nozzle. At the water inlet end B of the nozzle, a filter 5 is arranged in fixed positioning.

Notwithstanding the design of FIG. 1, the middle swirl piece 2 is not fixedly connected to the swirl housing 3 but axially movable in the inner bore 31 together with the inner swirl piece 1 over a defined length Y1. A determination of the central swirl piece 2 with respect to a rotation within the inner bore 31 is z. B. through guides possible but not required. An axial front end position of the axial movement Yl of the central swirl piece 2 in the inner bore 31 of the swirl housing 3 is defined by a radial projection 26 on the outer circumference of the middle swirl piece abutting a radial shoulder 33 on the inner circumference of the inner bore 31. FIG. 3A shows the axial rear end position or normal position of the middle swirl piece 2 in the non-triggered state of the nozzle. The length of the axial movement Yl of the central swirl piece 2 is selected so that the collar 23 and a part of the subsequent cylindrical projection 22 at the exit end A of the central swirl piece 2 in the axial front end position protrudes from the central bore 32, as shown in FIG 3B. The remaining in this position in the inner cavity 31 part of the cylindrical projection 22 carries in conjunction with the

Spiral grooves 4 and a defined gap between the inner cavity 31 and the middle swirl piece 2 in a conventional manner for nebulization. The aerosolized liquid particles, which are offset in a twist, finally pass through the space between the cylindrical projection 22 and the bore 32 and are deflected at the collar 23 and a correspondingly shaped axial outer front surface 34 of the swirl housing 3 at the outlet end A of the nozzle, so that a spray cone or spray screen is formed.

The inner swirl piece 1 has at the outlet end A a cylindrical projection 11, which in conjunction with the swirl grooves 4 and a defined gap between the inner cavity 21 and the swirl piece 1 in a conventional manner contributes to nebulization. The spray formed here exits through the central bore 24 in the neck 22 at the forward end of the nozzle approximately concentric with the outer spray shield.

At the entrance end B of the inner swirl piece 1, a further cylindrical projection 12 is arranged, preferably, but not necessarily, molded or with it

.0, wherein the projection 12 in conjunction with a central bore 61 in a sealing member 6, in which it is inserted axially displaceable, forms a valve device in which the neck forms a sealing element. The valve device forms an essential part of

L5 invention and its function will be described in more detail below.

The sealing member 6 is in this embodiment, an annular disc which is inserted from the inlet end B of the nozzle forth in a diameter-enlarged shoulder of the inner bore of the 0 swirl housing 3 and on the outer circumference relative to the swirl housing 3 by a radially provided on the outer circumference of the sealing member 6 Nut seated first sealing ring (preferably O-ring) 63 and at the central bore 61 relative to the cylindrical projection 12 of the inner 5 swirl piece 1 by a in a radially on the inner circumference of the bore 61 of the sealing member 6 radially formed groove second sealing ring (preferably O-ring ) 62 is sealed. The sealing member 6 is screwed in the swirl housing 3 by a from the inlet end B of the nozzle forth in a threaded piece of 0 inner bore 31 of the swirl housing 3

Circlip 7 fixed axially. However, the axial location of the sealing member 6 by the retaining ring 7 is essentially a safeguard against falling out because in use acts on the sealing part 6 of the water pressure and 5 presses this into the inner bore of the swirl piece into it. The securing ring 7 takes over in the illustrated embodiment, in addition, the holder of the filter 5, can but also omitted if this is otherwise attached to the swirl housing.

In a (not shown) variation, the sealing member 6 therefore on the outer circumference and axially relative to the swirl housing 3, z. B. be sealed by an annular or disc-shaped seal on a diameter-expanded shoulder of the inner bore. The seal against the swirl housing could also be achieved by an adhesive bond without the use of a separate sealing ring and circlip or by other sealants that need only withstand the pressure of water during operation.

In a further (not shown) variation of the locking ring 7 could also by a kind Baj onettverschluss ggf - in combination with a spring means for the axial securing of the sealing member in the swirl housing against falling out. If a releasable attachment is not desired or required, the retaining ring 7 or possibly. even the sealing member 6 without the use of the locking ring 7 after insertion of the inner swirl pieces in the inner bore of the swirl housing also z. B. welded or otherwise tightly and firmly connected with this. If it is possible to insert the inner swirl pieces into the inner bore of the swirl housing from the outlet-side end A of the nozzle, the seal piece or else the securing ring can also be an integral part of the swirl housing.

While the sealing of the sealing member 6 with respect to the swirl housing 3 can be designed as desired in itself, the radial seal between the central bore 61 of the sealing member 6 and the cylindrical approach or

Sealing element 12 of the inner swirl piece 1, which allows a relative mobility in the axial direction of the nozzle for the function of the valve means of importance. The axial length Y2 of the seal between the boss 12 and the bore 61 is set to be shorter than the length Y1 of the axial movement of the central swirl piece 2 in the inner bore 31 This has the consequence that at a certain point in the axial movement of the connected with the inner swirl piece 1 or by the liquid pressure in use against this pressed neck 12 together with the central swirl piece 2 (due to the axial abutment of the

Swirl piece 1 at the neck 25 of the middle swirl piece 2) of the in Fig. 3 initial position or first position, in which the inflow of liquid into the nozzle is prevented at the valve means, in the direction of the outlet end A of the nozzle after a certain distance of movement (namely, after a movement of the length Y2), the sealing of the neck 12 at the bore 61 is completed and the in use at the inlet end B of the nozzle or. The liquid present at the sealing part 6 and the sealing element 12 enters under its pressure into the intermediate spaces between the swirling bodies and the respective inner cavities and is swirled there. The axial movement of the central swirl piece 2 is terminated after a movement of the length Yl at the axially front stop 33 of the inner bore 31 and in a second position. In this position, the valve device is fully open and it is achieved the desired turbulence and formation of the two spray cone at the opening or mouth of the nozzle.

In the embodiment shown in FIG. 3A / B, the valve device is provided at the inlet end B of the nozzle as described, and is guided by the cylindrical projection or the like. the sealing member 12 which is inserted into the bore 61 in the sealing member 6 sealingly and axially movable formed. The seal of the nozzle is maintained except in the first or closed position of the valve means over a bestimme axial distance of movement of the seal body in the second or open position, so that the valve device is opened only after a certain delay. This movement distance of the sealing element, in which the valve device is still closed, is shorter than a total axial movement distance of the sealing body or. of the swirl body (s) in the second or fully open position. The arrangement of the valve device at the rear axial inlet-side end of the nozzle has the advantage that the nozzle is not constantly exposed to the particular extinguishing agent in particular in the responsible for the swirling functional areas in the non-triggering state (the normal state). As a result, corrosion or deposits of impurities are reliably avoided over longer periods of time, whereby the reliability of the nozzle is improved overall and guaranteed over long periods. In addition, this advantage can additionally be increased by introducing and maintaining a corrosion protection agent, for example a corrosion protection oil, in the regions of the nozzle downstream of the valve device, which in the release state enters from the nozzle entering into the nozzle

Extinguishing liquid is expelled. Another advantage of the arrangement of the valve means at the inlet end of the nozzle is that an application of this valve device in conjunction with the Auslösungsrtiechanismus described below on twin or. Drilling nozzles or even nozzles with even more spray cones is easily possible because the entire mechanism for the swirl and the multiple outlet openings at the mouth of the nozzle is downstream of the valve means and for all spray cones only a single valve means at the inlet to the nozzle is required. A distribution of the extinguishing liquid is easily possible in a region between the valve device and the twist pieces or inner bores. Alternatively, in a modification indicated in Fig. 5A / B, which is preferably to be applied to a single-nozzle (which forms only one spray cone), the valve means may also be disposed at the exit-side end A of the nozzle. Here, the seal could be axially moveable over a certain distance between an end of the nozzle located at the outlet end A of the nozzle and axially moveable in the cylindrical extension 22 Inner bore arranged Swirl piece 2 subsequent axially elongated collar 23 and also axially elongated central bore 32 in the front end plate 36 of the Drallbzw. Nozzle housing 3 done. A radial seal 27 (eg, an O-ring) may be provided in a radial groove in the outer peripheral surface of the collar 23 and / or in the inner peripheral surface of the bore 32 (not shown).

In use, in the embodiment of FIG. 3, the fluid pressure constantly acts on the inlet side B of the nozzle or sealing member 6 and the inlet end B facing the axial end surface 13 of the lug or seal member 12 of the swirl piece 1. Thus, the sealing member 12 and over this the inner swirl piece 1 and this in turn the middle swirl piece 2 in the axial direction of the nozzle to the outlet end A biased out. In order to prevent the opening of the valve device in the non-triggering state of the nozzle a counter-holding force must be provided which counteracts the fluid pressure and prevents the axial movement of the sealing element in the open position and only in the case of the desired release of the nozzle allows the axial movement and the opening causes the valve device. This function is achieved according to the invention by a triggering device 8 that can be activated in a temperature-dependent manner, which will be described below.

The triggering device 8 according to the invention according to a in Fig. 3 and in detail view in FIG. 4 comprises a cover 81, which is preferably made of a material with a good thermal conductivity, for example aluminum or copper. The lid 81 is provided on the outer circumference with a circumferential axial edge projection 82. The lid 81 is in the non-triggering state on the lying at the outlet end of the nozzle end of the nozzle body also called

Nozzle or swirl housing 3 is placed and covers this so that the circumferential axial edge projection 82 a portion of the Outer periphery of the swirl housing 3 overlaps. At the end of the axial edge projection 82 facing away from the cover surface 84, a small radially inwardly directed radial projection 83 is provided, so that between the cover surface 84 and the radial projection 83 a circumferential undercut 85 is formed in the axial direction.

In the end portion 35 of the outer periphery of the swirl housing 3, a radial recess 36 is provided, which extends over an axial length which is slightly larger than the overlap by the circumferential axial edge projection 82 of the lid 81. At the front axial end of the recess 36 is characterized formed radially projecting ridge 37, so that in the axial direction also an undercut 38 is formed. Alternatively, as shown in Fig. 4, it suffices to provide only the radially protruding ridge 37 at the axial front peripheral edge on the nozzle housing. The radial projection of the lid can be achieved for example by crimping. Furthermore, the j eweiligen projections can also be replaced or supplemented by recesses or depressions which are complementary to each other and form a space for receiving the temperature-dependent variable material described below.

In the area between the radial projection 83 of the lid 81 and the radially projecting ridge 37, a melting material 86 is introduced, which substantially fills this area. The melting material 86 in the solidified or. Although solid state is usually a certain cohesive connection with the respective surfaces, but the strength of this joint connection alone is not sufficient to regularly due to the

Resistant to withstand the shear forces acting on the lid, so that inadvertent release of the connection can occur in use.

In the design according to the invention therefore a positive connection between the lid and the

Swirl housing achieved by the molten material, the space between the radial projections or ridges or Recesses on lid and swirl housing fills and quasi "spreads" between them.This positive connection by the engagement between the

Projections / recesses of the lid and the nozzle body and the solder material is so strong and in any case significantly higher than the pure material adhesive forces of the solder joint at the interfaces, that it counteracts a significant axially directed shear force for lifting the lid. As a result, the triggering device, as will be explained later, can be subjected to considerable liquid or liquid during operation. Counteract extinguishing agent pressures.

The radial size of the recess 36 or. of the ridge 37 and the radial projection 83 on the deck egg can be very low, for example in the range "lmm. The width or the diameter at the radial projection 83 is dimensioned so that a removal of the lid from the swirl body 3 straight or. With a small game to the ridge 37 is possible. The radial projection 83 may extend around the entire circumference of the edge projection 82, which is preferred, or over a plurality of circumferentially distributed portions if necessary. correspond with sections of the recess 36 formed on the outer circumference of the swirl body.

As a melting material is preferably so-called. Used fusing solder, the at a given defined temperature value or. in a narrowly defined

Temperature range melts. By suitable choice of the fused solder so that the triggering range of the triggering device 8 can be determined relatively accurately and depending on the application in different areas. The fusible solder is in the area between the radial projections or. Burrs are introduced to the cover and swirl housing, for example, by the lid is placed on the end of the swirl housing, a strip of the solder is wrapped around the front end portion of the outer circumference of the swirl housing, and the swirl housing is placed with the lid at the bottom of a heating surface. When the melting temperature is reached, the solder melts abruptly and flows through gravity and, if necessary. the capillary action along the outer circumference of the nozzle housing down in the area between the radial projections and ridges on the lid and nozzle housing and fills it. A recess 36 on the circumference of the nozzle housing can serve as a solder supply chamber and promote the entry of the solder material in the gap.

As an alternative to a solder material, an adhesive or generally another material can be selected, which allows the production of the positive connection, ie in the "normal state" is rigid and provides the required strength against the shear forces due to the extinguishing medium pressure and which from a predetermined temperature its consistency defines changes, so z. B. plastically or directly becomes liquid, thereby releasing the positive connection, whereby the connection between the nozzle housing and lid weakened and ultimately completely lifted and the triggering device is thus brought into the actuated state. Between the cover surface 84 on the one hand and the axial end of the cylindrical projection 22 and. the collar or collar 23 of the central (or single) axially movable swirl piece 2 formed at the end of the nozzle located at the exit end A of the nozzle, located behind the bore 32 at the front end plate of FIG Nozzle body is located in the inner cavity, a spacer 87 is arranged to mechanically couple the movable twisting piece with the lid and to allow a power transmission. This spacer may be an integral part of the lid or a separate component. It may also be omitted if the federal government or a projection provided thereon or collar in the un-triggered state extends to the lid, as the z. B. indicated in Fig. 5 - is. In the following the operation of the tripping device according to the invention will be described in use. In use, the liquid exerts on the inlet side End of the nozzle located axial end face 13 of the sealing element or projection 12 of the inner swirl piece 1 (when the valve means as shown in FIG. 3 at the inlet end of the nozzle is arranged) or on the exit end of the nozzle located and the

Internal cavity facing rear surface 13 'of the sealing member 23 (when the valve means as shown in Fig. 5 at the outlet end of the nozzle is arranged) constantly a pressure and pushes the j eweilige seal member in the axial direction of the nozzle. The pressure or the resulting force is mechanically on the inner swirl piece 1, the middle swirl piece 2 and the spacer 87 (in the example of FIG. 3) or via the sealing member 23 directly (in the example of FIG. 5) Transfer cover surface 84. This force to lift the lid counteracts the holding force of the fusible link 86. Upon reaching the melting temperature, the solder melts abruptly and the holding effect is eliminated, so that the inner and middle swirl piece can move together in the axial direction of the nozzle to the outlet end A of the same. Therefore, in the case of triggering the lid 81 is thrown by the water pressure and the mechanical coupling with the sealing element from the axial end of the swirl housing. Since the seal of the valve device from the beginning of the axial movement over a certain distance Y2 of the axial movement of the

Sealing element is maintained, penetrates in the initial phase of the axial movement still no liquid in the nozzle. Only when this distance is covered and the lid 81 is already safely removed, the liquid flows into the nozzle and the turbulence and spray cone formation begins.

The delay of the inflow of the liquid has the advantage that an undesirable early cooling of the nozzle and thus of the molten solder is avoided by the liquid before the lid is safely and completely removed. This reliably prevents false triggering or incomplete triggering of the nozzle. Because the power for detachment of the lid by the fluid pressure: is applied and the lid and thus all parts located at the outlet end A of the nozzle are completely removed when triggered, thus the gravity effect for the triggering operation and the spray is not required, the nozzle according to the invention in horizontal, vertically upwards or in an inclined position, eg. B. in wall or floor installation of buildings etc. used and reliably triggered and operated. The formation of the spray cone is not affected by any components that remain after the release of the outlet opening of the nozzle. Because the sealing of the liquid in the nozzle or. from the nozzle is effected by its own valve device, which in the non-actuated

State of the triggering device is closed and is opened only after complete triggering of the triggering device, it is possible to realize the triggering device with fusible link in a simple manner, because a. liquid-tight execution of the melt solder connection between the lid and the nozzle housing is not required.

In addition, the visible part of the triggering device comprises only the lid, so that a fairing in installations in the residential or

Representation, where a visibility of the extinguishing equipment is unacceptable, either not at all is necessary, because the only visible lid does not bother visually, or by glare rings, such as by the indicated in Fig. 3 component 200 can be achieved easily and inexpensively and aesthetically pleasing , Such a bezel 200 covers the usually required for the installation of the nozzle larger openings in wall or ceiling trim panels and can by elastic brackets 201 z. B. placed on the swirl or nozzle housing and clamped on it and simply adjusted in position and centered with respect to the lid even if the nozzle is not mounted in a precisely aligned vertical orientation. This allows a fast and cost-effective lining of the openings. Finally, the nozzle as such is not extended by the flat lid of the trigger mechanism in the axial length, so that in installations in buildings the required space is less. Another advantage is that the release mechanism is relatively insensitive to mechanical damage and external influences compared to previous solutions and unintentional triggering of the spray nozzles can be avoided.

The invention described above

Triggering device can also be used advantageously in a further embodiment shown in Fig. 6, in which for generating the turbulence one of the design according to z. B. from DE 19533636 known and shown in Fig. 2 nozzle according to the prior art is used without axially movable swirl piece. In modification of the arrangement known from the prior art and for use of the triggering device according to the invention, the sealing body used with this nozzle is replaced with axial seal at the outlet of the nozzle by a sealing element or a sealing body 9 with radial seal 91, the or. which is inserted into the outlet opening 32 of the nozzle and allows axial movement over a defined distance, without the sealing effect is interrupted. The sealing body 9 forms with the outlet opening 32, the valve means at the outlet end of the nozzle. Incidentally, the trigger mechanism used in the prior art is replaced with the pressure body by the tripping mechanism according to the invention previously described with reference to FIGS. 3 and 4, wherein a lid is set by means of the described Schmelzlotverbindung invention above the seal body and fixed to the nozzle housing. The release takes place in such a way that the melting solder is liquefied when exposed to heat, and then the liquid pressure acting on the sealing body 9 on the rear surface 13 "thereof constantly presses against the lid 81, the suddenly decreasing holding force of the fusible solder overcomes and presses the sealing body together with the lid to the outside and thrown away from the nozzle. By maintained for a certain axial movement distance Y2 from the beginning of the release sealing effect of the radial seal on the seal body, the passage of water is initially prevented and made possible only when the sealing body has completely covered the predetermined axial travel distance and has repelled the lid reliably from the outlet end of the nozzle , A connection between the seal body and the lid is not required because the mechanical coupling and power transmission is ensured by the fluid pressure. In modifications of the embodiment, the sealing body 9 may also be formed as an integral part of the lid or made as a separate component and connected to this fixed or detachable.

The triggering device according to the invention, which is based on the use of the melt material (for example the fusible link as described) and the cover, can, as shown schematically in FIG. 4 is extended to the effect that an electric heating element 88 in the vicinity of the Schmelzlotmasse, for example, in the front end portion of the nozzle or swirl housing 3 as shown in Fig. 3 or 4 is arranged or as a separate element, which on the outer circumference of the lid is arranged in the region of the edge projection 82 at a distance therefrom so that the ejection of the lid is not impaired. The control of the heating element, for. B. in the form of a heating wire, etc. by an electric current via leads connected to the heating element leads specifically to a heating of the molten solder and can thus be used for selective remote release of the spray nozzles. This solution provides additional security in cases where the fire protection system is triggered in total or in zones or a targeted individual release of nozzles before reaching a correspondingly high temperature desired or required and z. B. by separate smoke detectors or by manual operation should be possible to counteract a strong smoke effect in smoldering fires or chemical reactions through the spray or to effectively fight a source of fire detection in the initial stage. This triggering of temperature-triggered triggering devices of spray nozzles in fire protection systems can be used regardless of the design and operation of the spray nozzles used, but is in the inventive

Melting material such as fusible solder-based triggering particularly advantageous.

In the in Fig. The swirl nozzle shown in FIG. 3 is a twin nozzle that produces two spray cones in use. A further embodiment of the invention (not shown) based on this embodiment may be implemented as a single nozzle. For this purpose, essentially only the inner swirl piece 1 and the inner bore 21 of the middle swirl piece 2 is omitted and the approach or the sealing element 12 at the inlet end of the then single and previously central swirl piece, which is arranged axially movable in the inner cavity of the nozzle housing provided. This variant is in principle the embodiment in FIG. 5 similar with the difference that the valve device is located at the axially rear end of the nozzle and controls the entry of liquid into the nozzle.

A further (not shown) based on this embodiment and modification of a single nozzle further modification may now provide that not the swirl itself is axially movably guided in the inner bore of the swirl housing to the movement of the valve means at the inlet end under the effect of fluid pressure when triggering the triggering device to throw off the lid, but an additional trigger or. Connecting pin is provided which extends between the triggering device on the one hand and the valve device on the other hand extends through the twisting piece and is axially movable. At the end of the release pin located at the inlet end of the nozzle, the cylindrical extension or, if appropriate, enlarged diameter is then inserted. Sealing body is provided and is as in the embodiment shown in Fig. 3 inserted into the bore of the sealing member and exposed in use on the upstream end surface of the fluid pressure. At the end of the release pin located at the exit end of the nozzle, the latter interacts with the triggering device or the cover so that when triggered (for example by melting the fusible link which holds the cover), the latter is replaced by the release pin on the cover passed force due to the fluid pressure on the opposite end of the trigger pin is mechanically dropped while simultaneously triggered by the axial movement of the trigger pin in the direction of the outlet end of the nozzle, the valve device at the inlet end of the nozzle delay and the spray function of the nozzle is activated. Apart from the changes described above, in this modification the features of the nozzle, in particular those of the valve device and the triggering device of the embodiment of FIG. 3 are taken over.

Another in the Fig. 7 illustrated fourth embodiment of a single swirl nozzle according to the invention is in principle the in FIG. 6 similar embodiment, in contrast to the trigger mechanism has no separate lid, which is positively held on the outer circumference of the nozzle housing 3 by the fusible link. Rather, in this variant, the triggering mechanism is formed by the fusible link and the sealing element itself. The fusible link 86 is introduced into a pair of recesses 92 connected to one another, which in the sealing element 93 inserted into the nozzle opening 32 on the one hand and into the nozzle housing in the region of the mouth of the

On the other hand, nozzle openings are provided so that they are in the non-triggered position of the valve device are opposite. The molten solder is introduced during assembly in liquid form into the recesses and is anchored in this form-locking after solidification. In order to facilitate insertion, an insertion groove 94 extending into the corresponding recesses may be provided on the outside. By the fusible link, the sealing member which, as shown in FIG. 6, is sealed against the nozzle bore by a radial seal 95 and thereby constitutes the valve means in the untripped condition against that of the nozzle inner cavity on the back surface 13 '' of the seal member 93 pending liquid pressure prevented from moving and so held in the sealing position.

The tripping mechanism is triggered by the fact that the melting solder liquefies due to the action of heat at the defined transition temperature and the positive connection can no longer be maintained. The fluid pressure then moves the seal member outward and eventually expels it from the nozzle orifice and the spray action of the nozzle begins.

The radial direction upstream radial seal, in conjunction with the defined axial travel distance Y2 during which the sealing action is maintained in the event of initiation, prevents liquid from prematurely cooling the fusible link before the sealing element is completely ejected from the nozzle orifice, that it can not be held even by Schmelzlotreste. This ensures a reliable and defined triggering of the nozzle.

The fusible link can also be understood in a generalized form as a material that changes its consistency from solid or rigid to plastic or elastic at a predetermined defined temperature and thereby releases the positive connection. On the only achievable by the cohesive bond adhesive forces at the interfaces between the material and the sealing element or the nozzle body is not important here, because even a liquid-tight connection through the material is not required.

In the Figs. FIGS. 8 and 9 show a fifth embodiment of a swirl nozzle, here a twin nozzle, which has the same shape as that shown in FIG. 3 and already described nozzle, but with a different trigger mechanism is used. Therefore, only the different triggering mechanism will be described below. This trigger mechanism can be handy for various

Sprühdüsenbauarten (single and triple nozzles) and also for normal sprinklers without Wasserverwirbelung be used and is therefore not limited to the illustrated combination with the twin nozzle with in the nozzle body movably arranged (s) swirl body (s) but with this

Nozzle type can be used advantageously. What is required is therefore a nozzle body or housing with a nozzle opening, on which the water jet or spray cone emerges, and a valve device with a sealing element, which sealingly seals the nozzle opening, and via a

Holding device is held in the sealing position, as long as the nozzle is in the non-actuated state. The sealing element may in this release mechanism, which does not make use of the fusing solder, as an axial seal such. B. in the prior art shown in FIG. 2 or as a valve device with radial seal as in the embodiments according to the invention shown in FIG. 3, 5 or 6 and, as in the case of these, be arranged either at the outlet-side end or at the inlet-side end of the nozzle. The triggering of the nozzle is also at this

Embodiment by a temperature-dependent actuated trigger element, preferably an elongated vial-like glass bulb 71 which is filled with a liquid and shatters when heated at a defined temperature. Such glass bulbs are for

Triggering of sprinklers and fire protection systems often and are commercially available in a wide range of temperature grades.

As shown in FIG. 8, the retainer includes a pair of resilient clamp straps 72, 73 supported on a support member 74 in the form of a disc in recesses 96 thereof located at opposite circumferential positions. The clamping brackets 72, 73 are inserted with play into the recesses 96, so that in each case a portion j edes clamping bracket protrudes on both sides of the support member and the clamp can perform tilting movements about a point 75. If the support element 74 as shown with the clamping brackets 72, 73 placed on the axial outlet-side end of the nozzle body 3, this tilting movement causes the clamping bracket between a locking position, in the bent end portions 76 of the clamping bracket on the back of the support member with the nozzle body. 3 for example B. in correspondingly shaped grooves 77 or projections are engaged, and an unlocking position in which the clamping brackets are not in engagement with the nozzle body, are movable. By appropriate choice of the axial distance of the interventions from the front end of the nozzle body, the size of the axial holding force is determined with which the holding device can hold a arranged between the support member and the nozzle front side seal member 78 against the water pressure.

If the elongated vial-like glass bulb 71 is clamped between the opposite end portions of the clamps at the front of the support member, the clamps are in the non-triggered state in the

Locking position held. The distance between the end portions of the clamp on the Aufnähmsteilen of the glass bulb is dimensioned so that the clamps, which are made of elastic material, are elastically deformed when inserted glass bulb and therefore produce a restoring force in the unlocked position when bursting the vial. To get smaller vials to be able to absorb and reinforce the elastic spring effect, the ends 79 of the small bow are bent radially inwardly.

An essential aspect and advantage of the triggering mechanism according to the invention is that the glass vial between the ends of the clamp is transverse to the nozzle opening and is spread between the small bracket. As a result, on the one hand the axial length of the trigger mechanism is significantly shortened, which simplifies the installation and the cladding of the nozzles in buildings. Furthermore, the water pressure is not held by the sensitive glass bulb but by the engagement of the clamp on the nozzle housing. As a result, the water pressure can be easily increased without the risk of unintentional release by premature breakage of the glass bulb.

Finally, the mechanical load on the glass bulb is determined only by the geometry of the clamp and their distance or elastic force at the selected deformation and substantially constant due to the design and not by the manually to be determined bias on the glass bulb, z. B. by a clamping screw.

Incidentally, the support member need not be disk-shaped and cover the entire front surface of the nozzle housing, but may be formed only of a metal strip or web which holds the clamps in the opposite position.

In an alternative (not shown) embodiment, the holding device can also be formed by a molded on the outer circumference of the nozzle housing 2-dimensional curve or thread structure along which the back

Sliding ends 76 of the clamp and are guided, are clamped in a rotational movement of the holding device simultaneously both in the axial direction against the sealing element and in the radial direction against the trigger element in the holding position and, if necessary. in an end position by a

Rastung the rear ends 76 of the small strap are locked. Moreover, the swirl nozzles according to the invention are usable in fire protection not only with water but generally for the atomization of liquids or liquid mixtures which are suitable for this purpose due to their viscosity and other properties. Furthermore, an application in other areas such as agriculture or in process engineering, etc., where a targeted nebulization of liquids and a single release is desired. FIGS. 10 and 11 show a triggering device which can be actuated according to the invention and is based on the principle of positive connection between two components explained above with reference to a material which can change its consistency from a predetermined temperature and thereby releases the positive connection for different

Spray nozzle types, in particular swirl nozzles or sprinklers for firefighting systems, can be used and, if necessary. even with these nozzle types by minor modifications can be retrofitted. The triggering device comprises a base element 101, which can be attached to a nozzle body 3 of the sprinkler or the spray nozzle in a conventional manner by screwing, gluing, riveting, pressing or by means of other joining techniques, and a holding element 102, which in use with a sealing element of a Valve device of the sprinkler or. the spray nozzle cooperates. The

Holding element 102 is connected in a form-locking manner to base element 102 via the described material (that is to say, for example, a temperature-sensitive adhesive or a solder material). In the embodiments shown, the basic element 101 in FIG. 11 an annular sleeve made of a heat-resistant

Plastic material and in Fig. 10 made of a metal material. The advantage of using a heat-resistant plastic material that is machinable, eg. B. PEEK (polyetheretherketone), is its low thermal conductivity with simultaneous dimensional stability.

This ensures that the heat dissipation from the holding element, preferably from a thermally well Conductive material such as copper, aluminum, brass or the like. is made, the melting material 104 is carried out quickly, but the further heat dissipation to the base element or via this to the nozzle is low and a faster response of the triggering device is achieved to a temperature increase. The holding element may possibly. be made of a slightly worse thermally conductive material such as stainless steel or a plastic, if the strength is sufficient and the achievable heat conduction to the molten material and, if necessary. a desired delay is guaranteed.

A comparable effect can also be achieved, as shown in FIG. 10, by reducing the annular sleeve in the wall thickness and thus in the mass, at least in a section 103 adjoining a connection point with the retaining element. This can be achieved by a radial and / or axial removal of material on the annular sleeve, for example as shown in Fig.10, or by a puncture in the axial direction in the wall of the annular sleeve (not shown), which forms an annular gap.

In this case, the annular sleeve can also be made of a conductive material. In the variant of FIG. 10, after attaching the annular sleeve to the nozzle body, an annular gap 105 which is filled with air and reduces heat transfer from the triggering device to the nozzle body results at the front peripheral region of the nozzle body.

The form-fitting connection shown in FIGS. 10 and 11 by means of melting material between the annular sleeve serving as a basic element and the holding element designed here in the form of a lid corresponds to the already described with reference to FIG. 4 or 7C described structure, ie an arrangement of the melt material for forming the positive connection between a projection or a recess on the lid-like support member which engages around an end of the annular sleeve with little play, on the one hand and a projection or a recess on the base element or the annular sleeve on the other. Accordingly, when the structure of FIG. 7C is used, the retaining element of the triggering device in the form of a cover with or without a sealing element can be inserted radially into the annular sleeve and with this in the manner shown in FIG. 7C be positively connected.

If a sealing of a spray nozzle by the triggering device itself is not required the basic element must not be closed on the circumference sleeve but can be interrupted by recesses and possibly reduced to a few struts, on the one hand on the nozzle body can be attached and on the other hand, the holding element, which also on a Strut or a bracket can be reduced, hold in the form-fitting manner by means of the fusible material. Accordingly, that too

Melting material can not be provided on the entire circumference but can be limited to a number distributed around the circumference breakpoints, provided that the required holding force is ensured in the non-triggered state. This design reduces the material consumption, the manufacturing costs and the heat capacity of the triggering device.

The melt material can be introduced in the manner described in the cavity between the holding element and the base element. Alternatively, the melt material can be introduced as a wire or open ring through a radial insertion hole in the cavity or in the form of material balls in a kind Baj onettverschluss between retaining element and base element or inserted as a ring in the cavity or pressed, wherein the projection on Retaining element that defines the positive locking on this part, even after placing the retaining element on the base element and introducing the material by knurling, folding or crimping of the retaining element can be generated.

Claims

claims

A swirl nozzle, in particular for firefighting installations, comprising: a nozzle body having a nozzle opening and at least one swirl piece inserted into an internal cavity for swirling a liquid, a valve means having a sealing element which in a first position controls the entry of the liquid into the nozzle body or the outlet prevents the nozzle body and in a second position allows this and when moving from the first position to the second position has a defined range of motion, in which the entry of the liquid is prevented in the nozzle body or the exit from the nozzle body, and a temperature-dependent operable

Triggering means which cooperates with the sealing member of the valve means, such that in the non-actuated state in the first position of the sealing member it exerts a retaining force against a liquid pressure acting on the sealing member in use and prevents movement of the sealing member, and in the actuated state movement of the sealing member, characterized in that the swirl piece or a unit of a plurality of swirl pieces in the associated

Inner cavity is arranged so that it / at least in the actuated state of the triggering device is movable therein in the axial direction of the nozzle body and moves in this movement, the sealing element in the second position.

2. swirl nozzle according to claim 1, wherein the sealing element is slidably inserted into an inlet opening of the nozzle body and is sealed against this, and 42

34

wherein the twisting piece or the unit is arranged from a plurality of swirl pieces between the triggering device on the one hand and the sealing element on the other hand and cooperating with the sealing element in a force-transmitting manner.

3. swirl nozzle according to claim 1, wherein the sealing element is slidably inserted into the nozzle opening and is sealed relative to this with a radial seal.

4. swirl nozzle according to claim 1, 2 or 3, wherein the

Triggering device has a holding element, which exerts the holding force against the force acting on the sealing element in use fluid pressure in the non-actuated state, wherein the holding element in the non-actuated state via a material is positively connected to the nozzle body and the material from a predetermined temperature its consistency to change and thereby releases the positive connection.

5. swirl nozzle according to claim 4, wherein the holding element is made of a thermally highly conductive material.

6. swirl nozzle according to claim 4 or 5, wherein the holding element is a cover.

7. swirl nozzle according to one of claims 4 to 6, wherein the material for forming the positive connection between a projection or a recess on the holding element on the one hand and a projection or a recess on the nozzle body on the other hand is arranged.

8. swirl nozzle according to one of claims 4 to 7, wherein the material is a melt release, in particular a fusible link or a plastic material.

9. swirl nozzle according to claim 1, 2 or 3, wherein the sealing element of the valve device is held in the non-actuated state by a holding device of the triggering device in the sealing position, wherein the triggering device has a temperature-dependent actuated trigger element, wherein the holding device comprises a pair of elastic clamping brackets which are supported by a support member so that the clamping bracket between a locking position in which the clamps are engaged with the nozzle body, and a

Unlocked position in which the clamps are not in engagement with the nozzle body, are movable, and wherein the trigger element holds the clamp in the non-triggered state in the locked position and elastically deformed.

10. swirl nozzle according to claim 9, wherein the Auslδseelement is an elongated glass bulb which is able to burst at a defined temperature.

11. swirl nozzle according to claim 10, wherein the elongated glass bulb is transverse to the nozzle opening and is spread between the clamping bracket.

12. swirl nozzle according to one of claims 9 to 11, wherein the movement of the clamping bracket from the locking position into the unlocked position a tilting movement. is a receptacle of the support element.

13. Spray nozzle, in particular swirl nozzle or sprinkler for firefighting systems, with a nozzle body with a Düsenδffnung, a valve device with a sealing element, which prevents the entry of the liquid into the nozzle body or the exit from the nozzle body in a first position and this permits in a second position , and a temperature-actuated triggering device with a holding element, which cooperates with the sealing element of the valve device, such that it exerts a holding force against a force acting on the sealing element in use fluid pressure in the non-actuated state and holds this in the first position, and in the actuated state the Movement of the sealing element in the second position permits, characterized in that the holding element of the triggering device with the

Nozzle body in the non-actuated state is positively connected via a material which is able to change its consistency from a predetermined temperature and thereby brings the triggering device in the actuated state by releasing the positive connection.

14. A spray nozzle according to claim 13, wherein the

Triggering device is coupled to transmit power to the sealing element to transmit in the actuated state, the movement of the sealing element on the holding element of the triggering device to drop this from the nozzle body.

15. Spray nozzle according to claim 13 or 14, wherein the sealing element is slidably inserted into the nozzle opening and is sealed with respect to this with a radial seal.

16. Spray nozzle according to one of claims 13 to 15, wherein the sealing element comprises a cylindrical projection which is displaceably guided in a cylindrical bore and is sealed to this via a radial seal.

17. Spray nozzle according to one of claims 13 to 16, with at least one twisting piece inserted into an inner cavity of the nozzle body for swirling a liquid.

18. Spray nozzle according to claim 17, wherein the sealing element cooperates force-transmittingly with a connecting pin, which extends between the holding element of the triggering device on the one hand and the sealing element on the other hand by the twisting piece and at least in the actuated state of the triggering device in the axial direction of the nozzle body is movable.

19. Spray nozzle according to one of claims 13 to 18, wherein the nozzle body is reduced at least in a subsequent to a connection point with the holding element portion in the wall thickness.

20. Spray nozzle according to one of claims 13 to 19, wherein the holding element is made of a thermally highly conductive material.

21. Spray nozzle according to one of claims 13 to 20, wherein the holding element is a cover.

22. Spray nozzle according to one of claims 13 to 21, wherein the material for forming the positive connection between a projection or a recess on the holding element on the one hand and a projection or a recess on the nozzle body on the other hand is arranged.

23. Spray nozzle according to one of claims 13 to 22, wherein the material is a melt release, in particular a fusible link or a plastic material with a defined melting range.

24. Temperature-dependent actuatable triggering device for spray nozzles, in particular swirl nozzles or sprinklers for firefighting systems, with a basic element which is connected to a nozzle body of the sprinkler or. the spray nozzle is attachable, and a holding element which cooperates in use with a sealing element of a valve device of the sprinkler or the spray nozzle, wherein the holding element is positively connected to the base member via a material which is able to change its consistency from a predetermined temperature and thereby releases the positive connection.

25. Temperature-dependent actuatable triggering device according to claim 24, wherein the base element is an annular sleeve made of a heat-resistant plastic material.

26. Temperature-dependent actuatable triggering device according to claim 24, wherein the base element is an annular sleeve made of a metal material.

27. Temperature-dependent actuatable triggering device according to claim 25 or 26, wherein the annular sleeve is reduced at least in a subsequent to a connection point with the holding element portion in the wall thickness.

28. Temperature-dependent actuatable triggering device according to one of claims 24 to 27, wherein the holding element is made of a thermally highly conductive material.

29. Temperature-dependent actuatable triggering device according to one of claims 24 to 28, wherein the holding element is a cover.

30. Temperature-dependent actuatable triggering device according to one of claims 24 to 29, wherein the material for forming the positive connection between a projection or a recess on the holding element on the one hand and a projection or a recess on the base element on the other hand is arranged.

31. Temperature-dependent actuatable triggering device according to one of claims 24 to 30, wherein the material is a melt release, in particular a fusible link or a plastic material having a defined melting range.

32. Temperature-responsive triggering device according to one of claims 24 to 31, wherein formed at least in an adjoining a connection point with the holding element portion, an air gap in the base member or by this in conjunction with a nozzle body on which the triggering device is mounted formed.