Sprinkler housing for a sprinkler, sprinkler for fire extinguishing systems having same, and use of same

Abstract

The invention relates to a sprinkler housing (50) for a sprinkler (1), in particular for operating pressures above 16 bar, with a fluid channel (12) provided in the sprinkler housing (50) with a fluid inlet (10) and at least one fluid outlet (8), a closure element (4) which is movable in a release direction (A) from a blocking position into a release position, wherein the closure element (4) closes the fluid channel (12) in the blocking position and opens it in the release position, a sealing element (5) which is attached to the closure element (4) and is designed to close the fluid channel (12) in a fluid-tight manner in the blocking position.According to the invention, it is proposed that the sprinkler housing (50) has a recess (17) through which the closure element (4) extends at least in the release position, wherein in the release position a protective chamber is defined between the closure element (4) and the recess (17), in which the sealing element (5) is arranged.

Description

[0001] The present invention relates to a sprinkler housing for a sprinkler, in particular for operating pressures above 16 bar, according to the preamble of claim 1. The invention further relates to a sprinkler with such a sprinkler housing and the use of such a sprinkler housing.

[0002] The sprinkler housings described above are well known. A recurring problem with such sprinkler housings is the longevity of the sealing elements used in the sprinkler housings. Due to their design, the sealing elements are often attached to the closure element or to a stationary seat opposite the closure element, with which the closure element, together with the seat, closes the fluid channel in the blocked position.

[0003] If the closure element is opened, particularly at the high pressures mentioned above, very large flows of extinguishing fluid occur within the sprinkler housing. In the case of existing housings, these extinguishing flows also affect the sealing element and result in the sealing element being subjected to severe shear and abrasion stress. This can lead to partial or complete destruction of the sealing element, particularly in the case of sealing elements that have aged after long periods of inactivity. The detached parts of the sealing elements are caught in the flow and move freely inside the sprinkler housing. In extreme cases, this can lead to parts of the sealing elements settling on or in the fluid outlets of the sprinkler housing, causing partial or, in the worst case, complete blockage.

[0004] US 2014 / 367125 A1 or US 2014 / 374126 A1 relate to fire extinguishing sprinklers with a sprinkler housing within which a fluid channel is formed. A movable closure element is arranged within the fluid channel. Furthermore, the sprinkler housing each comprises a stationary sealing element.

[0005] EP 0 797 465 A1 discloses a sprinkler with a sprinkler housing having a central channel extending between an inlet and a plurality of inclined nozzles. A closure element is arranged within the central channel and is held in the closed position by a trigger element. A seal is arranged at the upper end of the closure element, sealing the central channel in the direction of fluid flow. After the sprinkler is triggered and the closure element is moved into the release position, the seal is directly exposed to the extinguishing fluid.

[0006] EP 0 797 466 A1 and EP 1 404 418 A each relate to sprinklers with a housing having an inlet and multiple fluid outlets. A channel is provided between the inlet and outlets. A single- or multi-part closure element is arranged in the channel, the upper end of which, with a sealing element, forms a sealing contact with a plug at the upper end of the central channel. After the sprinkler is triggered, the closure element is moved into the release position, and the extinguishing fluid flows from the inlet directly past the sealing element toward the fluid outlets to exert an extinguishing effect.

[0007] DE 198 12 994 A1 relates to a thermally automatic triggering device comprising a three-way shut-off valve with an inlet opening and several line connections for conducting a coolant into a ring line connected to the triggering device, which supplies several fine spray nozzles with extinguishing fluid. The triggering device comprises a movable valve body and a support arranged thereon for a thermally activated glass vessel as a trigger. A locking piston is movably accommodated in the three-way shut-off valve, which can be moved from its locking position to its triggering position after the glass vessel is triggered.

[0008] Accordingly, the object of the invention was to provide a sprinkler housing in which the aforementioned disadvantages are overcome as far as possible. In particular, the object of the invention was to provide a sprinkler housing in which the risk of clogging of the fluid outlet(s) is reduced.

[0009] The invention solves the underlying problem in a sprinkler of the type described at the outset with the features of claim 1. Advantageous further developments emerge from the subclaims and the description as well as the figures.

[0010] The invention particularly proposes a sprinkler housing for a sprinkler for high operating pressures, in which a fluid channel is provided in the sprinkler housing with a fluid inlet and at least one fluid outlet, a closure element which is movable in a release direction A from a blocking position into a release position, wherein the closure element closes the fluid channel in the blocking position and opens it in the release position, a sealing element which is attached to the closure element and is designed to close the fluid channel in a fluid-tight manner in the blocking position, wherein the sprinkler housing has a recess through which the closure element extends at least in the release position, wherein in the release position a protective chamber is defined between the closure element and the recess, in which the sealing element is arranged.The invention is based on the finding that the most effective protective measure for the sealing element consists in positioning it as far away as possible from the main flow extending from the fluid inlet to the fluid outlet(s) when triggered, i.e. when the closure element is in the release position. For this purpose, the invention provides a protective chamber between the recess for receiving the closure element and the sealing element, within which the sealing element is arranged. In other words, in the release position, the sealing element is located within the recess for receiving the closure element in a flow-calmed area. By being inserted into this recess, the sealing element is exposed to less severe stress from the fluid flow of the extinguishing fluid, and the risk of partial but complete destruction of the sealing element is greatly reduced.

[0011] In a particularly preferred embodiment of the invention, the sprinkler housing has a distribution chamber from which both the recess for receiving the closure element and the at least one fluid outlet branch off, wherein the recess for receiving the closure element extends in a first direction, preferably the same as the release direction A, and the at least one fluid outlet extends in a second direction different from the first direction. Because the recess branches off from the distribution chamber, the sealing element, in the release position of the closure element, is de facto located outside the distribution chamber in a "side branch" that is subjected to less intense flow due to the fact that the main flow is directed toward the fluid outlets.In addition, turbulence forms in and around the recess due to the differently aligned axes of the fluid outlet and the recess for receiving the closure element, which further reduces the flow load on the sealing element.

[0012] Preferably, the at least one fluid outlet is located radially outside and / or in front of the recess for receiving the closure element, as seen in the release direction A. In particular, by "pulling forward" the fluid outlets against the release direction, a dead space is formed below the fluid outlets during operation, in which the flow is predominantly turbulent.

[0013] In a further preferred embodiment, the closure element has a circumferential groove in which the sealing element sits. The circumferential groove creates a recess for receiving the sealing element, which radially accommodates it partially or completely within the closure element, thereby providing further shielding of the sealing element from the surrounding fluid flow.

[0014] The closure element preferably has a projection adjacent to the circumferential groove accommodating the sealing element, opposite the release direction A, to protect the sealing element from flow influences in the release position. The projection forms the flank of the groove in the direction of the distribution chamber from the groove, in which the sealing element is seated. The provision of such a projection has the effect that the protective chamber formed between the recess for accommodating the closure element and the closure element itself is at least partially closed on its side opposite the release direction A, preferably facing the distribution chamber. This creates a particularly strong partitioning of the sealing element from the flow conditions prevailing in the distribution chamber. This design solution is suitable for particularly high operating pressures, for example in the range above 100 bar.

[0015] In a further preferred embodiment, a flow deflector is formed on the projection. The flow deflector is preferably configured to serve as an impact element for the extinguishing fluid entering the distribution chamber and to generate turbulence.

[0016] The flow deflector preferably extends into the distribution chamber opposite to the release direction A. Furthermore, the flow deflector is preferably configured to deflect extinguishing fluid flowing into the distribution chamber from the first direction in which the recess is oriented.

[0017] Further preferably, the flow deflector is configured to deflect extinguishing fluid flowing into the distribution chamber toward the second direction in which the fluid outlet(s) are aligned.

[0018] The projection preferably has a diameter of at least the sum of the base diameter of the groove that accommodates the sealing element and half the material thickness in the radial direction of the sealing element. This ensures good protection and, at the same time, a reliable fit of the sealing element in the groove.

[0019] The sprinkler housing is advantageously further developed in that the at least one fluid outlet is designed as a bore, or alternatively as a reversibly detachably coupled insert element, which in particularly preferred embodiments has a swirl body.

[0020] The design as an insert element allows for the realization of a variety of fluid delivery patterns, for example spray cones.

[0021] In a further preferred embodiment, the sprinkler housing according to the present invention has a cage that defines a cage space for receiving the closure element in the release position and for receiving a thermally activated trigger element in the blocking position. This embodiment, in particular, enables the sprinkler housing to be used as an open extinguishing nozzle if the thermally activated trigger element is not used. In this case, the closure element is permanently in the release position in the assembled installation position of the sprinkler housing, which is not disadvantageous because the sealing element is arranged in the protective chamber.

[0022] Alternatively, this configuration allows the sprinkler housing to be used together with a thermally activated trigger element inserted into the cage space in a sprinkler, particularly in a high-pressure sprinkler. Consequently, the invention also achieves its underlying objective in a sprinkler of the type described above by using a sprinkler housing configured according to one of the preferred embodiments described above.

[0023] Furthermore, the invention achieves the object underlying it by using a sprinkler housing according to one of the preferred embodiments described above as an extinguishing nozzle, in particular as an extinguishing nozzle for operating pressures in the range above 16 bar.

[0024] The invention is described in more detail below with reference to a preferred embodiment of the invention and the accompanying figures. Figure 1 shows a schematic representation of a sprinkler in a first operating state, Figure 2 shows a partial view of the sprinkler according to Figure 1 , Figure 3 another partial view of the sprinkler according to Figure 1 , Figure 4 another partial view of the sprinkler according to Figure 1 , Figure 5 a schematic view of the sprinkler according to Figure 1 in a second operating state, Figures 6a,b show a partial view of the sprinkler according to the preceding figures in the first operating state and a third operating state, and Figures 7a-f show various alternative shapes of a part of the sprinkler according to the Figures 1 to 6 .

[0025] Figure 1shows a sprinkler 1 according to a preferred embodiment. The sprinkler 1 has a sprinkler housing 50. The sprinkler housing 50 comprises a base body 2, a passage unit 3, and a fluid channel 12, which extends from a fluid inlet 10 to several fluid outlets 8. A closure element 4 is arranged in the interior of the sprinkler housing 50 for linear movement. The closure element 4 is in Figure 1 shown in a blocking position in which a sealing element 5 radially and axially compressed between the closure element 4 and the passage unit 3 closes the fluid channel 12 and thus prevents the fluid-conducting connection between the fluid inlet 10 and the fluid outlets 8.

[0026] In the passage unit 3, an orifice 11 is preferably formed to limit the flow velocity.

[0027] The closure element 4 is actuated by a thermally activated release element 25 in the Figure 1shown locked position. The thermally activatable trigger element 25 is held in a cage 27, which is integrally formed on the sprinkler housing 50, in particular on the base body 2. For this purpose, the cage 27 has a first abutment 28 for the axial, and preferably radial, positioning of the thermally activatable trigger element 25, while the closure element 4, at its end facing the thermally activatable trigger element 25, preferably has a second abutment 29 for the axial and / or radial positioning of the thermally activatable trigger element 25. The thermally activatable trigger element 25 is seated in a cage space 31 defined by the cage 27 and is inserted and held there without screwing. The necessary tension to hold the thermally activatable trigger element 25 is determined exclusively by the dimensioning of the closure element 4 and the threaded bores 28 extending in the release direction A ( Figure 5) acting pressure force of the extinguishing fluid (reference numeral 33) present above the sealing element 5 in the fluid channel 12.

[0028] The sprinkler housing 50 includes a receiving channel 16 for receiving a screen unit 9 on the side of the fluid inlet 10, as well as a distribution chamber 15. Branching off from the distribution chamber 15 are the fluid outlets 8 and a recess 17 for receiving the closure element 4.

[0029] The sprinkler housing 50 has a connection unit 38 with a coupling mechanism 26, preferably an external thread, wherein the connection unit 38 serves to connect the sprinkler 1 to a piping system carrying an extinguishing fluid. To seal the connection unit 38, the sprinkler 1 has a sealing element 6. The passage unit 3 is further sealed against the base body 2 by means of a sealing element 7.

[0030] The base body 2 has a nozzle head 39 adjacent to the section of the connection unit 38. The distribution chamber 15 with the fluid outlets 8 is formed in the section of the nozzle head 39. Axially adjacent to the section of the nozzle head 39, the cage 27 is integrally formed on the base body 2, so that the base body 2, together with the distribution chamber 15 and the cage 27, is formed in one piece.

[0031] As will be further explained Figure 2 in conjunction with Figure 4 As can be seen, the fluid outlets 8 extend in one or more second directions B, B' deviating from the release direction A, while the recess 17 extends in the release direction A. The extinguishing fluid flowing into the distribution chamber 15 in the release direction A, indicated by reference numeral 33, initially flows in the direction of the recess 17 and must be deflected from this direction in order to exit from the fluid outlets. Figure 5discussed in more detail.

[0032] On in Figure 2 At the lower end of the recess 17, a sealing surface 19 is formed which tapers in the release direction A. In the above embodiment, the tapered sealing surface 19 is conical with a cone angle α 2 . Figure 4 The closure element 4 shown in more detail has a sealing surface 32 which, in the assembled state, is also tapered in the release direction A and which, in the above embodiment, is conical and has a cone angle α 3 . Preferably, the cone angles α 2 and α 3 do not deviate from each other or only slightly, in particular in a range of < 5°. The preferably correspondingly designed tapered sealing surfaces 19, 32 serve as a stop for the closure element in the release position according to Figure 5 . They preferably form an elastomer-free seal 35.

[0033] With particular reference to the Figures 3 , 4and 6a,b The sealing function of the sealing element 5 will now be explained in more detail. A sealing surface 18 is formed on the passage unit 3 which widens in the release direction A. In the present exemplary embodiment, the widening sealing surface 18 is conical with a cone angle α 1 . The diameter of the fluid channel 12 consequently increases continuously in the release direction A as the sealing surface 18 widens. In the blocking position according to Figure 1 the sealing element 5 rests against the expanding sealing surface 18 and is compressed both radially and axially due to the non-parallel course of the expanding sealing surface 18 relative to the release direction A. This compression behavior is supported by the fact that the sealing element 5 in the blocking position ( Figure 1) is pressed against a radially extending sealing surface 30 and an axially extending sealing surface 36. The contact surfaces between the sealing element 5, the passage unit 3 and the closure element 4 thus form partial sealing surfaces, each of which is smaller than a single sealing surface would be in a sprinkler with a sealing element known from the prior art.

[0034] With particular reference to Figures 6a,b The compression behavior of the sealing element 5 is now explained in more detail. Figure 6a a first pressure P 1 is present on the inlet side of sprinkler 1. This pressure is also referred to as stand-by pressure and can, for example, be in a range of 10-13 bar, preferably < 12.5 bar. In this installation situation, the sealing element 5 takes on a material thickness S. If the pressure increases to a value P 2, shown in Figure 6b, the sealing element 5 is initially compressed even further and pressed more strongly in the direction of the expanding sealing surface 18 and the radially extending sealing surface 30. The effective area of ​​the operating pressure on the closure element is increased in this way. This particularly shows the advantageous design of the sealing arrangement in stand-by mode according to Figure 6a . If the trigger pressure is exceeded, which is equal to or greater than the value P 2 , for example in the range of 40 bar or more, the closure element 4 is released from the blocking position according to Figure 1 The sealing element 5 immediately loses contact with the expanding sealing surface 18 after just a few fractions of a millimeter and releases the fluid flow.

[0035] The passage unit 3, which accommodates the sealing surface 18 widening in the release direction A, is preferably manufactured as a machined workpiece and has a groove 13 on its outer circumferential surface for accommodating the sealing element 7 ( Figure 3 ).

[0036] In the following, in particular, the sealing element 5 in the release position according to Figure 5 The design protecting against wear and destruction is explained. In particular, reference is made to the Figures 4 and 5 .

[0037] In the Figure 5 In the release position of the sprinkler 1 shown, extinguishing fluid 33 is forced into the distribution chamber 15 in the release direction A. The closure element 4 is in the position shown in Figure 5release position shown below. A protective chamber is formed on the distributor chamber 15 between the closure element 4 and the branching recess 17, in which the sealing element 5 is accommodated. The protective chamber 17 is located away from the main flow direction from the fluid inlet to the fluid outlets 8, because they extend in the direction B, B', deviating from the release direction A (see Figure 2 ). Due to this remote arrangement of the sealing element 5, the sealing element 5 is located in a flow-calmed area in the release position of the closure element 4 and is less exposed to wear caused by the fast flow of the extinguishing fluid. This significantly reduces the susceptibility of the sealing element 5 to destruction and reliably prevents the fluid outlets 8 from becoming blocked by sheared or torn-off material of the sealing element 5.

[0038] The fluid outlets 8 are located radially outside the recesses 17. In the illustrated embodiment, the closure element 4 has a circumferential groove, characterized by the axially extending sealing surface 36 as the groove base. The sealing element 5 is received in this groove. By arranging the sealing element 5 on the closure element 4 at least partially countersunk into the groove, exposure to the flow of the extinguishing fluid forced in the direction of the fluid outlets 8 is further reduced. A projection 21 is formed on the closure element opposite the release direction A and adjacent to the groove 36, which protects the sealing element 5 from flow influences in the release position. A flow deflector 37 is particularly preferably formed on the projection 21 and extends opposite the release direction A. In the Figure 1In the blocking position shown, the flow deflector 37 preferably extends through the orifice far into the fluid channel 12 in the direction of the fluid inlet 10. In the Figure 5 In the release position shown, the flow deflector 37 still extends at least largely through the distribution chamber 15 in the direction of the fluid inlet 10. Extinguishing fluid flowing into the distribution chamber 15 is at least slowed down by the flow deflector 37, whereby the dynamic pressure component of the extinguishing fluid decreases and the load on the sealing element 5 decreases even further, or the sealing element 5 is shielded even more strongly. The protected arrangement of the sealing element 5 shown here in the protective chamber between the recess 17 and the closure element 4 makes it possible to use the sprinkler housing 50 as an open extinguishing nozzle without prior insertion of a thermally activated trigger element 25.

[0039] This generates significant synergy in terms of manufacturing technology, because one and the same component, namely the sprinkler housing 50 including the closure element 4 and the sealing element 5, can be used for multiple purposes without the need for retooling. The sealing element 5 is significantly less likely to be damaged or destroyed in its protected configuration, thus preventing unintentional blockage of the fluid outlets 8 even more reliably.

[0040] In the following, the structure of the closure element is described in more detail, referring first to Figure 4 .

[0041] The closure element 4 is preferably designed as a rotationally symmetrical body with several sections, in the present example four sections. A first section is the projection 21 with a diameter d1. A second section 22 is present with a diameter d2 and is designed to receive the sealing element 5. The axial sealing surface 36 and the radial sealing surface 30 are formed in this section. The radial sealing surface 30 is also the transition to a third section 23 with an outer diameter d3 and a section tapering in the release direction A with the sealing surface 32. There is a continuous diameter decrease in the release direction A to the diameter d4, whereby a conical profile with the cone angle α3. From there, a further section extends with a cylindrical profile in the form of a receiving cylinder 24. The receiving cylinder 24 is designed to enter the cage space 31 of the cage 27 when the closure element is moved from the locked position ( Fig. 1 ) into the release position ( Fig. 5 ) to penetrate.

[0042] The second abutment 29 is preferably formed in this receiving cylinder 24. The diameters d1, d2, d3, and d4 preferably have the following size relationship: D1 is greater than d2, d2 is smaller than d3, and d3 is greater than d4. The second region 22 with the diameter d2 is preferably adapted in its length to the material thickness of the sealing element 5. The difference d3 - d2 is preferably greater than the material thickness of the sealing element 5 in the unloaded state. The diameter d3 is preferably larger than the outer diameter of the sealing element 5 in the unloaded state. The radially extending sealing surface 30 dimensioned with diameter d3 thus serves as a stop surface for the closure element and also serves to prevent excessive deformation and shearing of the sealing element 5, or slipping of the sealing element 5 out of the groove during assembly, when the first sealing element 5 is pressed against the widening sealing surface 18.

[0043] Due to a diameter difference between d2 and d3, the groove in the second region 22 characterized by the axially extending sealing surface 36 is to be understood as an asymmetrical groove.

[0044] Preferably, the diameter d2 is in a range of 1.5 to 50 mm, particularly preferably in a range of 2 to 12 mm, further particularly preferably in the range of 12 mm to 30 mm.

[0045] The following is based on the Figures 7a to 7f additionally commented on the structure of the closure element 4.

[0046] The different variants of the closure element 4 are shown in the Figures 7a to 7f The basic structure of the closure element 4 is similar in all these variants. The main exception is the design of the projection 21 and the flow deflector 37 thereon. While the embodiment according to the Figures 7a, bdoes not have a flow deflector 37, but differs essentially in terms of the design of the receiving cylinder 24 and the axial extent of the area between the sealing area 22 and the receiving cylinder 24, in which according to Figure 7a a cylindrical intermediate section 23b and a slightly conical opposite section 23a are formed, the closure element 4 according to Figure 7c on its projection 21, a flow deflector 37 in the form of a circumferential annular projection 37a on the end face 40. Conversely, the projection 37a can also be defined as a concave recess 41 in the end face 40.

[0047] In the closure element 4 according to the Figure 7d a conical tip 37b is formed on the projection 21, which advantageously supports the deflection of the extinguishing fluid penetrating into the distribution chamber 15 radially outwards towards the fluid outlets 8.

[0048] According to Figure 7eA tip 37c with a concavely curved surface 42 is formed on the projection 21 of the closure element 4. The concave curvature supports the deflection of the fluid in the direction of the fluid outlets 8 and reduces the impact effect of the impinging fluid on the projection 21. In Figure 7f a variant of the closure element 4 is shown, in which a tip 37d with a concavely curved outer surface 43 is also formed on the projection 21, wherein the concavely curved outer surface opens into a concave recess 44 on the end face 40, which supports a deflection of the fluid impinging on the projection 21 against the release direction A.

[0049] The following section discusses the advantages of the one-piece design of the base body 2 including the cage 27 and the advantageous effects of preferred material combinations.

[0050] Because the sprinkler housing 50 has a base body 2 in which both the distribution chamber 15 with the fluid outlets 8 and the cage 27 with the cage space 31 are formed in one piece, a thermally activated triggering means 25 can be inserted and then securely held simply by mounting the closure element, preferably in the abutments 28, 29. Inserting and tightening the thermally activated triggering element using union nuts and similar means, as known from the prior art, can be eliminated. During assembly, work steps are saved, and the risk of premature damage to the thermally activated triggering element due to excessive clamping force is prevented.

[0051] The one-piece base body 2 is preferably made of a seawater-resistant copper alloy, such as seawater-resistant brass or one of the other materials mentioned above. However, the seawater-resistant copper alloy is particularly preferred. Furthermore, the base body is chemically nickel-plated, at least in the area of ​​the fluid outlets, but preferably completely. During chemical nickel plating, a nickel-phosphorus coating is applied to the base material in an autocatalytic deposition. This coating is preferably subsequently cured by means of a heat treatment. The residence time and temperature of the heat treatment are preferably adapted to the melting point of the base material. If polymers are used as the base material, the heat treatment temperature is naturally lower than for metals such as brass.The coating created by chemical nickel plating has the unique advantage of significantly increasing the abrasion resistance of non-hardenable materials such as brass. This advantageously combines the advantages of different materials in sprinkler systems.

[0052] The combination of the one-piece construction with the aforementioned material selection and heat treatment has the particular advantage that the sprinkler housing 50 is significantly less susceptible to clogging. As part of the approval testing of sprinklers and extinguishing nozzles, it must be ensured that the fluid outlets do not change, or change only very slightly, in terms of their flow rates during operation. This applies, on the one hand, to a reduction in the outlet cross-section due to blockages (hence clogging), but, on the other hand, also to an enlargement of the outlet cross-section due to abrasion. Particularly when technical water or seawater is used as the extinguishing fluid—in other words, water with a particle load or other contaminants—the risk of an increase in the outlet cross-section is generally greater than a blockage.Due to the increased hardness in combination with the corrosion resistance of the base material and the coating, the invention creates surprisingly good properties in this regard in a one-piece base body. Preferred embodiments (part of the description)

[0053] 1. ExampleA sprinkler housing (50) for a sprinkler (1), in particular for operating pressures above 16 bar, comprising a fluid channel (12) provided in the sprinkler housing (50) with a fluid inlet (10) and at least one fluid outlet (8), a closure element (4) which is movable in a release direction (A) from a blocking position to a release position, wherein the closure element (4) closes the fluid channel (12) in the blocking position and opens it in the release position, a sealing element (5) which is attached to the closure element (4) and is designed to close the fluid channel (12) in a fluid-tight manner in the blocking position, characterized in that the sprinkler housing (50) has a recess (17) through which the closure element (4) extends at least in the release position, wherein a protective chamber is defined between the closure element (4) and the recess (17) in the release position,in which the sealing element (5) is arranged. 2. , Example: Sprinkler housing (50) according to embodiment 1, characterized in that the sprinkler housing (50) has a distribution chamber (15) from which both the recess (17) for receiving the closure element (4) and the at least one fluid outlet (8) branch off, wherein the recess (17) for receiving the closure element (4) extends in a first direction, preferably the same as the release direction (A), and the at least one fluid outlet (8) extends in a second direction (B, B') different from the first direction. 3. Example: Sprinkler housing (50) according to embodiment 1, characterized in that the at least one fluid outlet (8) is arranged radially outside and / or in front of the recess (17) for receiving the closure element (4), as seen in the release direction (A). Example:Sprinkler housing (50) according to one of the preceding embodiments, characterized in that the closure element (4) has a circumferential groove (36) in which the sealing element (5) is seated. Example: Sprinkler housing (50) according to embodiment 4, characterized in that the closure element (4) has a projection (21) adjacent to the groove (36) opposite the release direction (A) for protecting the sealing element (5) from flow influences in the release position. 6. Example: Sprinkler housing (50) according to embodiment 5, characterized in that a flow deflector (37) is formed on the projection (21). 7. Example: Sprinkler housing (50) according to embodiment 6, characterized in that the flow deflector (37) extends into the distribution chamber (15) opposite to the release direction (A). 8. Example:Sprinkler housing (50) according to embodiment 6 or 7, characterized in that the flow deflector (37) is configured to deflect extinguishing fluid flowing into the distribution chamber (15) from the first direction in which the recess (17) for receiving the closure element (4) is oriented. 9. Example: Sprinkler housing (50) according to one of embodiments 6 to 8, characterized in that the flow deflector (37) is configured to deflect extinguishing fluid flowing into the distribution chamber (15) toward the second direction (B, B') of the at least one fluid outlet (8). 10. Example: Sprinkler housing (50) according to one of embodiments 4 to 9, characterized in that the projection (21) has a diameter of at least the sum of a base diameter (d2) of the groove (36) and half the material thickness in the radial direction of the sealing element (5). Example:Sprinkler housing (50) according to one of the preceding embodiments, characterized in that the at least one fluid outlet (8) is designed as a bore or as a preferably reversibly detachably coupled insert element, which particularly preferably has a swirl body. 12. Example: Sprinkler housing (50) according to one of the preceding embodiments, with a cage (27) defining a cage space (31) for receiving the closure element (4) in the release position and a thermally activated trigger element (25) in the blocking position. 13. Example: Sprinkler, in particular a high-pressure sprinkler, comprising a sprinkler housing (50) according to embodiment 12, and a thermally activated trigger element (25) accommodated in the cage (27), which holds the closure element (4) in the blocking position until it is activated. 14. Example:Use of a sprinkler housing (50) as an extinguishing nozzle, in particular for operating pressures in the range above 16 bar, wherein the sprinkler housing (50) is designed in particular according to one of the embodiments 1 to 12.

Claims

1. Sprinkler housing (50) for a sprinkler (1), in particular for operating pressures above 16 bar, comprising - a fluid channel (12) provided in the sprinkler housing (50) with a fluid inlet (10) and at least one fluid outlet (8), wherein the sprinkler housing (50) has a connection unit (38) with a coupling mechanism (26), preferably an external thread, wherein the connection unit (38) serves to connect the sprinkler (1) to a piping system carrying extinguishing fluid, - a closure element (4) which is movable in a release direction (A) from a blocking position to a release position, wherein the closure element (4) closes the fluid channel (12) in the blocking position and opens it in the release position, - a sealing element (5) which is attached to the closure element (4) and is designed to close the fluid channel (12) in a fluid-tight manner in the blocking position, characterized in thatthe sprinkler housing (50) has a recess (17) through which the closure element (4) extends at least in the release position, wherein in the release position a protective chamber is defined between the closure element (4) and the recess (17), in which the sealing element (5) is arranged.

2. Sprinkler housing (50) according to claim 1, characterized in that the sprinkler housing (50) has a distribution chamber (15) from which both the recess (17) for receiving the closure element (4) and the at least one fluid outlet (8) branch off, wherein the recess (17) for receiving the closure element (4) extends in a first direction, preferably the same as the release direction (A), and the at least one fluid outlet (8) extends in a second direction (B, B') different from the first direction.

3. Sprinkler housing (50) according to claim 1, characterized in thatthe at least one fluid outlet (8) is arranged radially outside and / or in front of the recess (17) for receiving the closure element (4) as seen in the release direction (A).

4. Sprinkler housing (50) according to one of the preceding claims, characterized in that the closure element (4) has a circumferential groove (36) in which the sealing element (5) sits.

5. Sprinkler housing (50) according to claim 4, characterized in that the closure element (4) has a projection (21) adjacent to the groove (36) opposite to the release direction (A) to protect the sealing element (5) from flow influences in the release position.

6. Sprinkler housing (50) according to one of claims 4 or 5, characterized in that the projection (21) has a diameter of at least the sum of a base diameter (d2) of the groove (36) and half the material thickness in the radial direction of the sealing element (5).

7. Sprinkler housing (50) according to one of the preceding claims, characterized in that the at least one fluid outlet (8) is designed as a bore or as a preferably reversibly detachably coupled insert element, which particularly preferably has a swirl body.

8. Sprinkler housing (50) according to one of the preceding claims, with a cage (27) which defines a cage space (31) for receiving the closure element (4) in the release position and a thermally activated trigger element (25) in the blocking position.

9. Sprinkler, in particular high-pressure sprinkler, with a sprinkler housing (50) according to claim 8, and a thermally activated trigger element (25) accommodated in the cage (27), which holds the closure element (4) in the blocking position until it is activated.

10. Use of a sprinkler housing (50) as an extinguishing nozzle, in particular for operating pressures in the range above 16 bar, wherein the sprinkler housing (50) is designed according to one of claims 1 to 8.

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