EP3107630B1 - Extinguishing-fluid-nozzle system for stationary fire-extinguishing systems, having an aperture ring, and extinguishing-fluid nozzle and aperture ring for the same - Google Patents

Description

The invention relates to a Löschfluiddüsensystem according to the preamble of claim 1, which is in particular an extinguishing gas nozzle system for stationary fire extinguishing systems, with a Löschfluiddüse comprising a base body having an inlet opening and fluidly attachable to an extinguishing fluid line, a nozzle head, one or more fluid-conducting with the Inlet opening having connected outlet openings for discharging the extinguishing fluid, and having a diaphragm with a flow restricting diaphragm ring, which is arranged in the fluid path between the inlet opening and the one or more outlet openings.

The invention further relates to a panel according to the preamble of claim 15 and an extinguishing fluid nozzle according to the preamble of claim 16.

Stationary fire extinguishing systems are known in principle. The essential function of such fire extinguishing systems is the monitoring of rooms or entire buildings on the emergence of a fire hazard. Upon registration of an incipient fire, the known fire extinguishing systems are designed to Extinguishing agent such as. To promote an extinguishing fluid from an extinguishing fluid source through an appropriately trained distribution network to the place of fire or fire and deliver there from appropriately trained extinguishing fluid nozzles. There are various possibilities to form the extinguishing fluid nozzles themselves. An essential aim in the parameterization of such extinguishing systems is the targeted and effective as possible dispensing of the extinguishing fluid in the direction of the fire source. In most cases, the sources of fire are located where the highest risk of fire formation was previously suspected, so that most extinguishing nozzles have further alignment means in order to purposefully release extinguishing fluid to such potential sources of fire.

Particular but not exclusive attention of the invention was to fire extinguishing systems with extinguishing fluids such as carbon dioxide, argon, nitrogen or mixtures of the aforementioned gases, as well as with chemical extinguishing fluids such as HFC 227ea or FK5-1-12. When using such extinguishing fluids, it is important for the success of the extinguishing process that the distribution of the extinguishing fluid is carried out according to the geometry of the protected area. In addition to the geometric orientation of the nozzles but it depends on the amount of extinguishing agent emitted by the nozzle. The specific flow rate of the extinguishing fluid discharged from each nozzle is usually adapted to the respective application situation by introducing apertures in the form of holes of reduced size (compared to the other internal cross section in the fluid path of the nozzle body) into a fluid path inside the extinguishing nozzles. There are also known nozzle types in which annular diaphragm body are installed. Exemplary fire extinguishing systems with an extinguishing agent nozzle in which an annular diaphragm has been installed are known in WO 2012/091712 A1 . FR 2 719 487 A1 and DE 44 39 798 C2 shown.

DE 24 55 364 A1 discloses a sprinkler system with multiple sprinklers at different heights, wherein at least in some extruded tubes of the sprinkler system or at their inlets upstream of the sprinklers throttle orifices are arranged.

Out US 2,918,933 A is a throttle for restricting the flow or volume limitation in a line section known, in which a handle portion extends outwardly from a fitting, with which the flow restriction can be adjusted by means of a screw thread.

Out DE 43 42 912 A1 a shower head with a connection for the water supply having housing is known, in which a support member which carries a shower base with water outlet nozzles is arranged, wherein on the support member, a throttle body is formed, which cooperates with a tubular valve member for determining the flow rate per unit time , The valve member is formed there as a sleeve and slidably disposed in the housing with an adjusting device, wherein the downstream region is formed extended, so that the inner diameter of the extended portion corresponds to the outer diameter of the housing mounted in the region of the sleeve.

Out WO 2007/0733390 A1 is known a pressure relief valve for pressurized gas for suppressing fire, which works in two stages self-regulating. The valve includes a valve body, a piston and a plug, and a valve actuator and a piston actuator. The piston is movable within the valve housing along an axis between a first and second position. The plug is movable within the valve body along that axis between a closed valve position, a partially open position, and a fully open position. The valve actuator allows the plug to move from the closed to the partially open position. The piston actuator moves the piston from the first position to the second position when a gas pressure in the gas cylinder remains below a desired value. As the piston moves to the second position, the piston allows the plug to change from the partially open position to the fully open position.

The known fire extinguishing systems are often used in buildings in which the room conditions change over time, for example, because in-premises facilities or storage items be stored, modified or removed. Furthermore, it may happen that parts of the fire extinguishing system are updated and changed, for example, including the extinguishing agents used. In such cases, an adaptation of the extinguishing fluid nozzles is necessary, which is associated with the known systems with high temporal and structural complexity. This has proven to be a disadvantage. Another disadvantage that is found in the prior art, is that after the introduction of an aperture in a nozzle, whether by installation of a diaphragm ring, or by introducing one or more aperture holes, subsequently no longer readily detectable, which inner diameter has the aperture. This can lead, for example, to the fact that nozzles are dismantled and reassembled again, the removal of which would not have been necessary, because the aperture diameter was suitable for the new purpose. Likewise, it may happen that nozzles are not disassembled and replaced with new nozzles, although the aperture diameter provided in the nozzles is no longer suitable for the new purpose.

The invention was thus based on the object to improve an extinguishing fluid nozzle system of the type described in such a way that the adaptation of the system to changing conditions of use is simplified.

The invention solves the underlying task in the extinguishing fluid nozzle system of the type described by this is formed with the features of claim 1.

The invention solves the underlying task further in a diaphragm of the type described above with the features of claim 15, and in a quenching nozzle with the features of claim 16th

The diaphragm has a fixedly connected to the diaphragm ring, extending from the diaphragm ring outwardly handle portion which extends in the assembled state of the diaphragm outside of the extinguishing fluid nozzle. By means of this grip section provided on the panel, it is ensured that even when the panel is mounted in the extinguishing fluid nozzle, it is still visible from the outside, which is mounted for a panel, as the handle section is visible from the outside. It is now readily possible to provide the handle portion with an identification element for a characteristic feature such as the respective associated inner diameter of the diaphragm. As a result, the risk of misallocation of certain aperture sizes for the particular application of the extinguishing fluid nozzle is significantly minimized.

According to a particularly preferred development of the invention, the extinguishing fluid nozzle has a continuous insertion opening for receiving the diaphragm, wherein the insertion opening extends from an inner side of the extinguishing fluid nozzle to an outer side on the circumference of the extinguishing fluid nozzle. This makes it possible to equip the extinguishing fluid nozzle through the insertion opening with a diaphragm, or to remove an aperture from the extinguishing fluid nozzle through the insertion without having to remove the entire extinguishing fluid nozzle from its place of use, resulting in a significant reduction of the assembly effort and thus time savings on initial assembly, while waiting such Löschfluiddüsensystem pulls.

In a particularly preferred embodiment according to the invention, the dimensions of the insertion opening correspond to the dimensions of an inserted in the state through the insertion opening extending through the insertion portion of the handle portion of the diaphragm. This ensures that the diaphragm sits play, preferably without play with its insertion in the insertion, and it does not come to an unwanted loosening or slipping of the aperture in the extinguishing fluid.

In a further preferred embodiment of the invention, the insertion opening extends laterally at an angle to the longitudinal direction of the extinguishing fluid nozzle, preferably transversely to the longitudinal direction of the extinguishing fluid nozzle. Preferably, in this case, the inner dimensions of the insertion opening are adapted to the outer dimensions of the diaphragm ring and the insertion, that the diaphragm is inserted by sliding sideways in the extinguishing fluid nozzle and by pulling sideways from it is removable. In other words, the diaphragm is pushed in from the side into the extinguishing fluid nozzle in a guillotine manner or out of it pulled out, which requires a particularly simple handling when changing the aperture.

According to an alternative preferred embodiment of the invention, the insertion opening extends in the direction of the longitudinal axis of the extinguishing fluid nozzle up to a front end of the body in which it is introduced, so for example, the main body or the nozzle body. In this embodiment, the insertion opening is thus "open" to one side in the longitudinal direction of the extinguishing fluid nozzle. In this case, it is preferable if the width of the insertion section of the diaphragm transverse to the longitudinal direction of the extinguishing fluid nozzle is smaller than the width of the diaphragm ring transversely to the longitudinal direction of the extinguishing fluid nozzle. In other words, the insertion section is narrower in the transverse direction of the extinguishing fluid nozzle than the diaphragm ring received in the extinguishing fluid nozzle. The insertion opening is in other words preferably designed as a slot open on one side in the manner of a slotted guide.

Preferably, in this embodiment, the inner dimensions of the insertion opening are adapted to the outer dimensions of the insertion so that the aperture is insertable by sliding in the direction of the longitudinal axis in the extinguishing fluid nozzle. "Internal dimensions" are understood to mean the dimensions in the longitudinal and transverse directions of the extinguishing fluid nozzle. Although this embodiment requires after insertion of the diaphragm or before removing the diaphragm setting the aperture by closing the hitherto "open" end of the insertion opening. But is already created by the relatively smaller insertion opening in the direction transverse to the longitudinal axis of the extinguishing fluid already a backup against unwanted lateral removal of the aperture.

Preferably, the panel is secured in the inserted state by means of an externally screwed onto the main body or the nozzle head nut. Further preferably, at the level of the diaphragm (relative to the longitudinal direction of the extinguishing fluid nozzle) a clamping element, for example designed as a clamping ring, is provided, which surrounds the main body or the nozzle head and additionally secures the diaphragm against rotation. Particularly preferably, the diaphragm has a or a plurality of recesses adapted to the clamping element into which the clamping element extends. The above embodiments are particularly preferred in an extinguishing fluid nozzle system in which the nozzle head and the base body are integrally formed. But it is also possible to form the nozzle head and the main body in several parts.

In a preferred embodiment, the nozzle head, preferably by means of a screw connection, reversibly releasably connected to the base body, wherein the aperture in the inserted state of the diaphragm, preferably by means of screwing the nozzle head to the main body, non-positively and / or positively connected thereto. In this context, reversible solubility is understood to mean in particular that it is possible to bring about a large number of separations and renewed connections of the connecting means in a non-destructive manner.

In a preferred embodiment of the extinguishing fluid nozzle system according to the invention, as indicated at the outset, an identification element is arranged on at least one surface on at least one surface, preferably on two opposite surfaces, in particular selected from the list consisting of identifiable optically and / or haptically recognizable identification elements, machine-readable identification elements or combinations thereof. Examples of optically and / or haptic perceptible identification elements are, for example, printing, inscriptions, engraving, embossing, punching or milling and material application. Examples of machine-readable identification elements are, for example, barcodes, RFID tags or the like coded information. The identification elements can be applied, for example, using fluorescent or phosphorescent colorants to improve the readability.

The invention has been explained with reference to the above preferred embodiments of the overall system with reference to the interaction between the extinguishing fluid nozzle and the diaphragm inserted into it. However, the invention is reflected not only in the system consisting of the combination of these elements, but also in the two individual elements.

In a further aspect, the invention thus relates to a shutter for an extinguishing fluid nozzle, in particular extinguishing gas nozzle for stationary fire extinguishing systems, in a system according to one of the preferred embodiments described above, with a restrictor ring for restricting the flow in a fluid path between an inlet opening and one or more outlet openings Fluid nozzle can be arranged, wherein the diaphragm has a fixedly connected to the diaphragm ring, extending from the diaphragm ring outwardly grip portion which is arranged in the assembled state of the diaphragm outside the extinguishing fluid nozzle. The diaphragm is preferably further developed in accordance with the above-described embodiments of the extinguishing fluid nozzle system, for which reason reference is made in full to the above statements.

In a further aspect, the invention thus also relates to an extinguishing fluid nozzle, in particular an extinguishing gas nozzle for an extinguishing fluid nozzle system according to one of the preferred embodiments described above, in particular with a base body having an inlet opening and fluid-conductively attachable to an extinguishing fluid line, a nozzle head, one or more wherein the extinguishing fluid nozzle is adapted to receive a shutter according to one of the preferred embodiments described above, in particular with a flow restrictor ring arranged in the fluid path between the inlet port and one or the a plurality of outlet openings can be arranged, which has a fixedly connected to the diaphragm ring, extending from the diaphragm ring outwardly grip portion, which in the assembled state of the diaphragm is arranged outside of the extinguishing fluid nozzle.

Also with regard to the advantageous developments of the extinguishing fluid nozzle according to the invention, reference is made in full to the features of the above-described extinguishing fluid system according to the invention.

Figur 1

ein Löschfluiddüsensystem gemäß einem ersten Ausführungsbeispiel in einer schematischen räumlichen Explosionsdarstellung,

Figur 2a

ein Löschfluiddüsensystem gemäß einem zweiten Ausführungsbei-spiel in einer schematischen Querschnittsansicht in einem ersten Zu-stand,

Figur 2b

das Löschfluiddüsensystem gemäß Figur 2a in einem zweiten Zustand,

Figur 3a

ein Löschfluiddüsensystem gemäß einem dritten Ausführungsbeispiel in einem ersten Zustand in einer schematischen Explosionsdarstel-lung,

Figur 3b

das System gemäß Figur 3a in einem zweiten Zustand,

Figur 3c

das System gemäß den Figur 3a, b in einem dritten Zustand,

Figur 3d

das System gemäß den Figur 3a-c in einem vierten Zustand, und

Figur 3e

das System gemäß den Figur 3a-d in einem fünften Zustand.

The invention will be described in more detail below with reference to the attached figures with reference to several preferred embodiments. Hereby show:

FIG. 1

a Löschfluiddüsensystem according to a first embodiment in a schematic exploded space view,

FIG. 2a

an extinguishing fluid nozzle system according to a second embodiment in a schematic cross-sectional view in a first state,

FIG. 2b

the extinguishing fluid nozzle system according to FIG. 2a in a second state,

FIG. 3a

an extinguishing fluid nozzle system according to a third embodiment in a first state in a schematic exploded view,

FIG. 3b

the system according to FIG. 3a in a second state,

Figure 3c

the system according to the FIG. 3a, b in a third state,

3d figure

the system according to the Figure 3a-c in a fourth state, and

FIG. 3e

the system according to the Figure 3a-d in a fifth state.

FIG. 1 shows an extinguishing fluid nozzle system 1 according to a first preferred embodiment of the invention. The extinguishing fluid nozzle system 1 has a main body 3, which can be reversibly detachably connected to a nozzle head 5. Between the base body 3 and the nozzle head 5, a diaphragm 7 can be arranged.

The main body 3 has in one, in FIG. 1 upper, peripheral portion on an external thread 9. At one, in FIG. 1 lower section has the Main body 3 a hexagonal profile 11. In a side surface 11 a of the circumference of the base body 3, an insertion opening 13 is inserted, which extends from the inner peripheral surface to the outer peripheral surface, and extends in the longitudinal direction of the axis A. The insertion opening 13 is at one, in FIG. 1 lower, front side of the main body 3 open.

The diaphragm 7 has an aperture ring 15, which is adapted for introduction into the interior of the extinguishing fluid nozzle. The aperture ring 15 has a smaller inner diameter than the other interior in the fluid path of the extinguishing fluid nozzle system 1. This inner diameter serves to limit the flow cross section within the extinguishing fluid nozzle.

The panel 7 has a handle portion 17 which extends from the aperture ring 15 radially outward. The grip portion 17 in turn has an insertion portion 19, the width of which is reduced transversely to the direction of the axis A and corresponds to the width of the insertion opening 13 transversely to the direction of the axis A. The grip portion 17 has an identification element 29.

To insert the aperture 7 into the extinguishing fluid nozzle of the extinguishing fluid nozzle system 1, the nozzle head 5, which has an external thread 21, must be unscrewed from the thread arranged in the interior of the hexagonal profile 11. Subsequently, the diaphragm 7 can be brought into position by aligning the insertion section 19 on the insertion opening 13 and subsequent sliding of the diaphragm 7 along the insertion opening 13 into the base body 3. Following this, the nozzle head 5 is screwed back into the main body 3. Fluid, which now enters through an inlet opening 23 in the base body 3, is hindered in its flow through the aperture ring 15 of the diaphragm 7, i. the flow cross-section is limited before it exits from one or more outlet openings 25 from the nozzle head 5.

The handle portion 17 is shown in the present embodiment without marking with identification element (s). On the outside of the insertion portion 19 lying part of the handle portion 17 is but without Furthermore, a label according to an embodiment of the invention attachable.

In the FIGS. 2a, b another embodiment of the invention is shown. Shown here is an extinguishing fluid system 100 with a base body 104, which is formed integrally with a nozzle head 106. In the main body 104, an insertion opening 113 is introduced to one side transversely to the axis A. The insertion opening 113 is slot-shaped and adapted to receive a diaphragm 107. The diaphragm 107 is equal in function to the diaphragm 7 in accordance with FIG. 1 by having an aperture ring 115 adapted to confine the flow area within the extinguishing fluid nozzle. The grip portion 117 of the diaphragm 107 has the same width as the outer diameter of the diaphragm ring 115. Thus, both the diaphragm ring 115 and the insertion portion 117 are adapted to the width of the insertion opening 113. The nozzle head 106 has a plurality of outlet openings 125.

The aperture 107 is laterally, transversely to the direction of the longitudinal axis A, in the direction of arrow B in the base 104 can be inserted. This condition is in FIG. 2b displayed. To prevent unintentional removal of the diaphragm 107 from the base body 104 and from the nozzle head 106 is in the embodiment according to FIGS. 2a, b a lock nut 127 is provided on an external thread 109 on the base body 104. As in FIG. 2b shown, the lock nut 127 is screwed after insertion of the aperture 107 against this and secures and simultaneously seals the insertion 113 from.

In the in FIG. 2a, b As shown, the diaphragm 107 has an annular shoulder 118 on the lower side of the diaphragm 107 in the figures, which supports the diaphragm 107 against a corresponding shoulder 108 in the nozzle head 106. Thus, the panel is secured both positive and positive in the state shown.

In addition, the diaphragm 107 according to FIG. 2a, b an identification in the form of an identification element 129. In the present case, the identification element 129 is formed as a continuous recess.

The FIGS. 3a-e finally show a third embodiment according to the invention. There, a Löschfluiddüsensystem 200 is shown, which in turn has a one-piece structure of base body 204 and nozzle head 206. In the main body 204 is an aligned transversely to the axis A insertion opening 213 is formed, which has substantially the same function as the insertion opening 113 in the embodiment of FIGS. 2a B. In this regard, reference is made in this respect to the above statements. On an outer peripheral surface, an external thread 209 is attached. Between the external thread 209 and the nozzle head 206, a clamping element 231 is formed at the level of the insertion opening 213. The external thread 209 is designed to receive a lock nut 227. The nozzle head 206 has a plurality of outlet openings 225.

The aperture 207 used in the fluid nozzle system 200 has at its grip portion 217 two recesses 232 for receiving correspondingly formed clamping element ends 234 of the clamping element 231. On the right in the figures shown portion of the handle portion 217 a mark in the form of an optical identification element 229 is attached. The FIGS. 3a-e show by way of example the assembly sequences for introducing the diaphragm 207 into the extinguishing fluid nozzle of the extinguishing fluid nozzle system 200.

First, the aperture 207 is determined from the state of FIG FIG. 3a moved in the direction of the arrow C and inserted into the correspondingly formed insertion opening 213. After complete introduction, shown in FIG. 3b , the clamping element is, as indicated by arrow D, moved to the height of the diaphragm 207, pushed onto the nozzle head 206 and engages around this such that the end portions 234 engage in the recesses 232 of the diaphragm 207, see state according to Figure 3c ,

Then, for further fastening and sealing of the insertion opening 213, the lock nut 227 is screwed in the direction of the arrow E onto the external thread 209 until it is in the end position according to FIG 3d figure brought is. In cross-section, the picture follows FIG. 3e ,

To remove the panel 207 from in the FIGS. 3a-e The extinguishing fluid nozzle system 200 shown will undergo the steps described above in reverse order.

As can be seen from the foregoing, the invention has provided a system for efficient diaphragm replacement in extinguishing fluid nozzle systems. The simple identification option on the handle sections of the panels is another way to increase efficiency and avoid errors.

Claims (16)

1. Extinguishing fluid nozzle system (1, 100, 200), in particular extinguishing gas nozzle system for stationary fire extinguishing systems, having an extinguishing fluid nozzle having:

   a base member (3, 104, 204) which has an inlet opening (23, 123, 223) and which can be secured to an extinguishing fluid line in a fluid-conducting manner,

   a nozzle head (5, 106, 206) which has one or more outlet openings (25, 125, 225) which are connected to the inlet opening in a fluid-conducting manner for discharging the extinguishing fluid, and

   having an aperture member (7, 107, 207) which has:

   an aperture ring (15, 115, 215) which is for flow limitation and which is arranged in the fluid path between the inlet opening and the one or more outlet openings,

   characterised in that the aperture member has a gripping portion (17, 117, 217) which is securely connected to the aperture ring and which extends outwards from the aperture ring and which in the assembled state of the aperture member extends outside the extinguishing fluid nozzle.
2. Extinguishing fluid nozzle system according to claim 1, characterised in that the extinguishing fluid nozzle has a continuous introduction opening (13, 113, 213) for receiving the aperture member, wherein the introduction opening extends from an inner side of the extinguishing fluid nozzle to an outer side on the periphery of the extinguishing fluid nozzle.
3. Extinguishing fluid nozzle system according to claim 2, wherein the dimensions of the introduction opening correspond to the dimensions of an introduction portion (19, 119, 219) of the gripping portion of the aperture member, which portion extends through the introduction opening.
4. Extinguishing fluid nozzle system according to claim 2 or 3, characterised in that the introduction opening (113, 213) extends sideways at an angle with respect to the longitudinal axis (A) of the extinguishing fluid nozzle, preferably transversely relative to the longitudinal axis.
5. Extinguishing fluid nozzle system according to claim 4, wherein the inner dimensions of the introduction opening (113, 213) are adapted to the outer dimensions of the aperture ring (115, 215) and the introduction portion (119, 219) in such a manner that the aperture member can be introduced sideways into the extinguishing fluid nozzle by means of pushing.
6. Extinguishing fluid nozzle system according to claim 2 or 3, characterised in that the introduction opening (13) extends in the direction of the longitudinal axis (A) of the extinguishing fluid nozzle as far as an end face of the base member (3) or the nozzle head.
7. Extinguishing fluid nozzle system according to claim 6, wherein the width of the introduction portion (19) of the aperture member transversely relative to the longitudinal direction of the extinguishing fluid nozzle is smaller than the width of the aperture ring (15) transversely relative to the longitudinal axis of the extinguishing fluid nozzle.
8. Extinguishing fluid nozzle system according to claim 7, wherein the inner dimensions of the introduction opening (13) are adapted to the outer dimensions of the introduction portion (19) in such a manner that the aperture member can be introduced by means of pushing in the direction of the longitudinal axis (A) into the extinguishing fluid nozzle.
9. Extinguishing fluid nozzle system according to any one of the preceding claims, characterised in that the aperture member (107, 207) is secured in the introduced state by means of a nut (127, 227) which is screwed at the outer side onto the base member (104, 204) or the nozzle head.
10. Extinguishing fluid nozzle system according to claim 9, wherein at the height of the aperture member (207) a clamping element (231) engages around the base member (204) or the nozzle head and additionally secures the aperture member against rotation.
11. Extinguishing fluid nozzle system according to claim 10, wherein the aperture member has recesses (232) which are adapted to the clamping element and into which the clamping element extends.
12. Extinguishing fluid nozzle system according to any one of the preceding claims, characterised in that the nozzle head (106, 206) and the base member (104, 204) are constructed in an integral manner.
13. Extinguishing fluid nozzle system according to any one of claims 1 to 11, wherein the nozzle head (5), preferably by means of a screw connection, is coupled to the base member (3) in a reversibly releasable manner, wherein the aperture member (7) in the installed state of the aperture member, preferably by means of screwing the nozzle head to the base member, is connected thereto in a non-positive-locking and/or positive-locking manner.
14. Extinguishing fluid nozzle system according to any one of the preceding claims,
    characterised in that an identification element (129, 229) is arranged on the gripping portion (17, 117, 217) on at least one surface, preferably on two opposing surfaces, in particular selected from the list comprising:

    - optically and/or haptically perceptible identification element,

    - machine-readable identification element,

    or a combination thereof.
15. Aperture member (7, 107, 207) for an extinguishing fluid nozzle system, in particular for stationary fire extinguishing systems, according to any one of the preceding claims,
    having an aperture ring for flow limitation, which can be arranged in a fluid path between an inlet opening and one or more outlet openings of the extinguishing fluid nozzle,
    characterised in that the aperture member has a gripping portion which is securely connected to the aperture ring and which extends outwards from the aperture ring and which in the assembled state of the aperture member is arranged outside the extinguishing fluid nozzle.
16. Extinguishing fluid nozzle for an extinguishing fluid nozzle system, in particular for stationary fire extinguishing systems, according to any one of claims 1 to 14, having:

    a base member which has an inlet opening and which can be secured to an extinguishing fluid line in a fluid-conducting manner,

    a nozzle head which has one or more outlet openings which are connected to the inlet opening in a fluid-conducting manner for discharging the extinguishing fluid,

    characterised in that the extinguishing fluid nozzle is configured to receive an aperture member having:

    an aperture ring which is for flow limitation and which can be arranged in the fluid path between the inlet opening and the one or more outlet openings,

    and having a gripping portion which is securely connected to the aperture ring and which extends outwards from the aperture ring and which in the assembled state of the aperture member extends outside the extinguishing fluid nozzle.

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