Sprinkler system and method for mounting a shielding cover for a fire extinguishing system

Abstract

Sprinkler system (16) for a fire extinguishing system (14) with multiple sprinklers (17, 46), wherein the sprinkler system (16) comprises a sprinkler (17) with a trigger element (30) and a shielding hood (18), the shielding hood (18) being designed to shield the trigger element (30) from extinguishing agent from adjacent sprinklers (46). A proximal sprinkler end (20) is connectable to an extinguishing agent supply line (15), wherein the trigger element (30) is arranged between the proximal sprinkler end (20) and a distal sprinkler end (21). The shielding hood (18) includes an opening (37), wherein in a shielding state of the sprinkler system (16) the sprinkler (17) is arranged in the opening (37) so that the shielding hood (18) encloses the sprinkler (17) between the proximal sprinkler end (20) and the triggering element (30).The opening (37) is dimensioned such that the shielding hood (18) can be displaced beyond the distal sprinkler end (21) in an assembly state of the sprinkler system (16), starting from the shielded state. The invention also relates to a method for assembling a shielding hood (18) in a sprinkler system (16) according to the invention.

Description

[0001] The invention relates to a sprinkler system for a fire extinguishing system with multiple sprinklers, wherein the sprinkler system comprises a sprinkler with a trigger element and a shielding hood, and wherein the shielding hood is designed to shield the trigger element from extinguishing agent from neighboring sprinklers. The invention also relates to a method for mounting the shielding hood.

[0002] A typical fire extinguishing system includes an extinguishing agent supply line, which may be filled with a pressurized extinguishing agent when the fire extinguishing system is in standby mode. A sprinkler may be connected to the extinguishing agent supply line, with one outlet of the sprinkler closed when the fire extinguishing system is in standby mode. When a fire breaks out, the sprinkler's trigger element is triggered, and the outlet is opened, allowing extinguishing agent to escape and act on the fire.

[0003] The trigger element can be triggered if a trigger temperature is exceeded. After a fire breaks out in the vicinity of the sprinkler, the temperature at the trigger element can rise, whereby the temperature can depend on the distance of the fire from the trigger element. The effectiveness of the extinguishing agent against a fire is limited to the sprinkler's effective range. The trigger temperature can be selected so that the trigger element is triggered as soon as a fire breaks out within the sprinkler's effective range.

[0004] US 6 533 041 B1 relates to a cover for the access hole to a sprinkler in a ceiling panel. Protective devices for sprinklers that protect the sprinkler from mechanical damage are known from DE 10 2008 046 996 A1 and US 2011 / 290508 A1.

[0005] In a fire extinguishing system with multiple sprinklers, a fire can break out in the effective area of ​​a first sprinkler and spread to the effective area of ​​a second sprinkler. Extinguishing agent escaping from the first sprinkler can reach the trigger element of the second sprinkler before the trigger element of the second sprinkler has been triggered. The influence of the extinguishing agent can reduce the temperature at the trigger element, for example by removing evaporation heat through evaporation of the extinguishing agent at the trigger element and / or by the extinguishing agent forming a heat-insulating shell around the trigger element. This can prevent the trigger element of the second sprinkler from reaching a trigger temperature, even if the fire has already entered the effective area of ​​the second sprinkler.In order to prevent the triggering process of a second sprinkler from being delayed or prevented by the influence of extinguishing agent from an adjacent first sprinkler, a common sprinkler system includes a shielding hood, wherein the shielding hood is designed to shield the triggering element from extinguishing agent from adjacent sprinklers.

[0006] Until now, it was common practice to attach the shielding hood between the sprinkler and the extinguishing agent supply line. This procedure has the disadvantage that the sprinkler's connection to the extinguishing agent supply line must be interrupted in order to install the shielding hood; this usually requires draining the entire fire extinguishing system. According to the state of the art, therefore, a great deal of effort must be expended simply to replace a damaged shielding hood, for example. Sprinkler hoods consisting of two composable halves are known from the publications KR 101 973 326 B1, KR 200 467 507 Y1, KR 101 344 981 B1 and US 3 964 549 A. US 2011 / 290508 A1 discloses a sprinkler with a base plate that can be mounted on an extinguishing agent supply line and to which a cage surrounding the sprinkler head is fixed.

[0007] The invention is based on the object of presenting a sprinkler system with a sprinkler and a shielding hood, as well as a method for mounting the shielding hood, in which the effort required to mount the shielding hood is reduced compared to the prior art. Based on the cited prior art, the object is achieved by a sprinkler system according to claim 1 and by a method according to claim 14.

[0008] The invention is based on the idea that the effort required to install a shielding hood is reduced if the shielding hood can be installed without having to interrupt the sprinkler's connection to the extinguishing agent supply line. The invention therefore proposes installing the shielding hood from the distal end of the sprinkler, with a proximal end of the sprinkler being connected to the extinguishing agent supply line. The invention recognizes that an opening in the shielding hood must have the dimensions according to the invention for this purpose.

[0009] The base element can correspond to a connection point on an extinguishing agent supply line and can be connected to the extinguishing agent supply line. The base element can comprise an extinguishing agent passage; the extinguishing agent passage can be connectable to the extinguishing agent supply line at a proximal end of the base element, so that extinguishing agent from the extinguishing agent supply line can enter the extinguishing agent passage; a distal end of the passage can form an outlet opening of the sprinkler. The outlet opening can be closed when the fire extinguishing system is in the standby state and open when the fire extinguishing system is in operation, so that when the fire extinguishing system is in operation, extinguishing agent can exit the sprinkler through the extinguishing agent supply line and the passage.

[0010] The sprinkler outlet opening can be closed with a closure element in the standby mode, which is removed when the sprinkler is activated. The activation element can keep the closure element closed when the fire extinguishing system is in the standby mode. When the sprinkler is activated, the activation element can release the closure element, so that the closure element is pushed out of the outlet opening by the pressure of the extinguishing agent.

[0011] The sprinkler may include a support element. The support element may extend from the base piece toward the distal sprinkler end. The support element may be in the form of a bracket. If an imaginary sprinkler axis extends centrally between the base piece and the distal sprinkler end, two support columns of the support element may extend substantially parallel to the sprinkler axis, wherein the support columns may be arranged on opposite sides of the sprinkler axis, each at a radial distance from the sprinkler axis; a support web may extend between the distal ends of the support columns.

[0012] The sprinkler may include a spray deflector. The spray deflector may be arranged at the distal end of the sprinkler; in particular, the spray deflector may be attached to the support web of the support element. The spray deflector may be designed to deflect the extinguishing agent jet emerging from the sprinkler's outlet opening to the side. Preferably, the extinguishing agent is distributed substantially evenly across all lateral directions.

[0013] When the fire extinguishing system is in standby mode, the trigger element can be supported between the closure element and the sprinkler's spray deflector. The trigger element can, for example, be designed as a fusible link, which is solid at ambient temperature and melts when exposed to heat. A trigger element in the form of a glass bulb that shatters when exposed to heat is also possible.

[0014] A shielding hood according to the invention comprises a shielding surface and an opening in the shielding surface. The spatial orientation of the shielding hood can be defined by an imaginary hood axis. The shielding surface can comprise a flat surface, wherein the outer contour of the flat surface can correspond, for example, to a polygon or an ellipse. If the shielding surface is a flat surface, the hood axis can be perpendicular to the shielding surface. The shielding surface can be three-dimensional; the shielding surface can, for example, comprise the lateral surface of a cone, a truncated cone, a pyramid, or a truncated pyramid; alternatively or additionally, the shielding surface can, for example, comprise sections of ellipsoids or paraboloids. If the shielding surface is three-dimensional, the hood axis can correspond to an axis of symmetry of the shielding surface.The shielding hood can comprise both a flat section and a three-dimensionally shaped section; for example, the shielding surface can comprise a flat base surface and a three-dimensionally shaped collar. In particular, the shielding surface can comprise a circular base surface and the outer surface of a truncated cone, wherein the circular base surface corresponds to the outer surface of the truncated cone; in this case, the hood axis runs along the symmetry axis of the truncated cone and is perpendicular to the circular base surface.

[0015] The opening in the shielding hood can be arranged in a flat section and / or in a three-dimensionally shaped section of the shielding surface. The opening can be characterized by an opening projection, where the opening projection is the projection of the opening onto a projection plane, with the hood axis perpendicular to the projection plane; if the opening is arranged in a flat section of the hood axis, the opening projection is congruent with the opening. The outline of the opening projection can be formed by straight lines and / or by round contours.The opening may be characterized by a transverse dimension and a longitudinal dimension, wherein a transverse dimension corresponds to the distance between two transversely opposite points on the outline of the opening projection and wherein the longitudinal dimension corresponds to the distance between two longitudinally opposite points on the outline of the opening projection; a transverse direction and a longitudinal direction may be perpendicular to each other and perpendicular to the hood axis.

[0016] Cross-sections can be formed through the sprinkler, with a cross-sectional area being essentially perpendicular to the imaginary sprinkler axis. A cross-section can take on different shapes and surface areas, depending on the point along the sprinkler axis at which the cross-section is formed; a cross-sectional area can consist of several partial areas; for example, a cross-section in the middle between the base piece and the spray deflector can comprise three partial areas, with one partial area each being assigned to the two holding columns of the holding element and another partial area being assigned to the triggering element. An effective cross-sectional outline can be defined as the outline of the smallest possible contiguous area that includes all the partial areas of a cross-section; for a cross-section with only one partial area, the effective cross-sectional outline corresponds to the outline of one partial area.A cross-section can be characterized by a transverse extent and a longitudinal extent, where a transverse extent corresponds to the distance in the transverse direction between two opposite points of the effective cross-sectional outline and where the longitudinal extent corresponds to the distance between two longitudinally opposite points of the effective cross-sectional outline, where a transverse direction and a longitudinal direction are perpendicular to each other and perpendicular to the sprinkler axis.

[0017] The transverse dimensions and / or the longitudinal dimensions of a cross-section can vary along the sprinkler axis. For example, at the distal sprinkler end, a maximum longitudinal dimension of the cross-section can correspond to the length of the support web between the two support columns of the support element, with the maximum transverse dimension corresponding to the diameter of the spray deflector; for a cross-section midway between the base piece and the spray deflector, the maximum longitudinal dimension can correspond to the maximum longitudinal dimension of the cross-section at the distal sprinkler end, with the maximum transverse dimension corresponding to the width of a support column; the transverse dimension of the cross-section midway between the base piece and the spray deflector would then be smaller than the transverse dimension of the cross-section at the distal sprinkler end.

[0018] There are axial sections with small cross-section and sections with large cross-section along the sprinkler axis.

[0019] A sprinkler section with a small cross-section fits into the opening of the shield hood if the sprinkler axis and the hood axis are aligned essentially parallel to each other; the longitudinal and transverse dimensions of the cross-sections through the sprinkler are then each less than or equal to the longitudinal and transverse dimensions of the opening in the shield hood, respectively. If the sprinkler consists only of sections with a small cross-section, the shield hood can be moved relative to the sprinkler along the entire length of the sprinkler axis, whereby the sprinkler axis can be aligned parallel to the hood axis throughout.

[0020] A sprinkler section with a large cross-section will not fit in the opening of the shield cap if the sprinkler axis and the cap axis are aligned essentially parallel to each other; the longitudinal extent and / or the transverse extent of the cross-sections through the sprinkler are then each greater than the longitudinal extent or the transverse extent of the opening in the shield cap. There can be surmountable sections with a large cross-section and insurmountable sections with a large cross-section. If a sprinkler section with a small cross-section is arranged in the opening of the shield cap, the shield cap can be moved from the section with a small cross-section beyond a surmountable section with a large cross-section relative to the sprinkler if the sprinkler axis is tilted relative to the cap axis.For example, if the sprinkler is arranged with a sprinkler section between the base piece and the spray deflector in the opening of the shield hood, the shield hood can be moved past the spray deflector by sliding it sideways relative to the sprinkler and by angling the hood axis relative to the sprinkler axis, and in this way can be removed from the sprinkler, even though the transverse dimension of the opening in the shield hood is smaller than the transverse dimension of the spray deflector; likewise, the sprinkler can be brought back into the opening of the shield hood over the spray deflector. In contrast, an insurmountable sprinkler section with a large cross-section cannot be moved through the opening of the shield hood in any way; an insurmountable section with a large cross-section can define a stop position along the sprinkler axis.

[0021] In a shielding state of the sprinkler system, the sprinkler is arranged in the opening of the shielding hood, so that the shielding hood encloses the sprinkler between the proximal sprinkler end and the trigger element. In the shielding state, the shielding hood is preferably arranged upwards in the direction of gravity above the trigger element, so that the shielding hood can shield extinguishing agent coming from above from the trigger element. In the shielding state, a sprinkler section with a small cross-section is preferably arranged in the opening, so that the hood axis and the sprinkler axis can be aligned parallel to one another. In particular, a section of the base element of the sprinkler can be arranged in the opening.The base element can thicken towards the proximal end; the base element defines a stop position towards the proximal end so that the shielding hood cannot be moved beyond the proximal end of the sprinkler when in the shielding state. In the shielding state, the gap in the opening between the shielding hood and the sprinkler can be as small as possible so that as little extinguishing agent as possible can pass through the gap. In the shielding state, the opening in the shielding hood can be arranged opposite another component of the fire extinguishing system in such a way that the gap is covered upwards in the direction of gravity by the another component so that the other component can shield extinguishing agent coming from above from the gap.For example, the gap can be covered by a thickening of the base element at the proximal end of the sprinkler; alternatively or additionally, the gap can be covered by the extinguishing agent supply line.

[0022] In the assembled state, the shielding cap can be displaced relative to the sprinkler within a mounting section of the sprinkler. In the mounting section, the sprinkler includes both small-diameter sprinkler sections and overridable large-diameter sprinkler sections; the mounting section extends from the sprinkler section, which, in the shielded state, is arranged in the opening of the shielding cap, to beyond the distal sprinkler end.The opening of the shielding cap can be placed over the distal end of the sprinkler from a disconnected state and moved relative to the sprinkler until the shielding state is reached, whereby the sprinkler is not positioned in the opening of the shielding cap in the disconnected state. Conversely, the shielding cap can be moved relative to the sprinkler from the shielding state beyond the distal sprinkler end until the sprinkler is no longer positioned in the opening of the shielding cap. The shielding cap can be inserted into and / or removed from the sprinkler system in this manner in the assembled state.

[0023] The shielding cap can be attached to the sprinkler and / or to the extinguishing agent supply line. The shielding cap can be attached using fastening structures that also serve to attach the sprinkler to the extinguishing agent supply line. For example, a fastening element can clamp the sprinkler against the extinguishing agent supply line. The fastening element can be a mounting bracket with a U-shaped bend and two substantially straight sections; the mounting bracket can rest with the bend on the side of the extinguishing agent supply line opposite the sprinkler, so that the extinguishing agent supply line is enclosed between the fastening element and the sprinkler. The straight sections of the mounting bracket can correspond with recesses on the sprinkler; the recesses can be formed in the base element of the sprinkler.The ends of the fastening element can have threads, whereby the sprinkler can be tensioned against the mounting bracket and the extinguishing agent supply line using nuts that match the threads. Once the sprinkler is tensioned against the extinguishing agent supply line in this way, the ends of the mounting bracket can protrude beyond the screwed-on nuts; the shielding cap can be attached to the protruding ends of the mounting bracket. For this purpose, the shielding cap can include mounting holes through which the shielding cap can be pushed onto the ends of the mounting bracket. The shielding cap can be connected to the ends of the mounting bracket using separate fasteners, such as additional nuts.

[0024] In one embodiment, the shielding hood itself is equipped with fastening means, so that separate fastening means can be dispensed with. For example, the shielding hood can comprise fastening projections designed to engage the circumference of a bolt-shaped portion of the fastening element. The fastening projections can point inward from the circumference of the fastening hole. A fastening hole can be provided with a plurality of fastening projections distributed over the circumference of the fastening hole. The number of fastening projections in a fastening hole can be, for example, between 3 and 20, preferably between 6 and 15.The distance between the tips of the fastening projections can be less than the diameter of the bolt-shaped portion of the fastening element, so that the fastening projections are spread apart when pushed onto the bolt-shaped portion and rest under tension against the circumference of the bolt-shaped portion. The fastening means of the shielding cap can be designed so that the shielding cap can be detached from the sprinkler without the use of tools. In particular, the fastening projections can be designed so that their holding force can be overcome by applying manual force.

[0025] The invention also relates to a method for assembling a shielding hood according to claim 14.

[0026] The method can be further developed with additional features that are described in connection with the sprinkler system according to the invention. The sprinkler system can be further developed with additional features that are described in connection with the method according to the invention.

[0027] The invention is described below by way of example with reference to advantageous embodiments in the accompanying drawings. They show: Fig. 1: a fire extinguishing system with two sprinkler systems according to the invention; Fig. 2: a sprinkler according to the invention; Fig. 3a: a further cross-section in the middle of the sprinkler through a sprinkler according to the invention according to Figure 2 ; Fig. 3b: a cross section at the distal sprinkler end through a sprinkler according to the invention according to Figure 2; Fig. 4: a shielding hood according to the invention; Fig. 5: a sprinkler system according to the invention; Fig. 6: a sprinkler according to the invention, attached to an extinguishing agent supply line; Fig. 7: a sprinkler system according to the invention on an extinguishing agent supply line.

[0028] Figure 1 shows a fire extinguishing system 14 with extinguishing agent supply lines 15 and two sprinkler systems 16, 46. The sprinkler systems 16, 46 each comprise a sprinkler 17 and a shielding hood 18. The sprinkler systems 16, 46 are attached to the extinguishing agent supply lines 15 with fastening elements 19. The extinguishing agent supply lines 15 can be fed from an extinguishing agent supply source (not shown).

[0029] Figure 2shows a sprinkler 17 with a proximal sprinkler end 20 and a distal sprinkler end 21, between which an imaginary sprinkler axis 22 extends. The sprinkler 17 comprises a base element 23 at the proximal sprinkler end 20; the proximal end of the base element 23 can be connected to an extinguishing agent supply line 15. An outlet opening 24 at the distal end of the base element 23 is closed by a closure element 25 so that no extinguishing agent escapes from the outlet opening 24 when the fire extinguishing system 14 is in a standby state. The sprinkler 17 comprises a holding element 26 with two holding columns 27 and a holding web 28. A spray disc 29 is arranged at the distal sprinkler end 21 and fastened to the holding web 28. The sprinkler 17 comprises a trigger element 30 which is supported between the closure element 25 and the spray disc 29 of the sprinkler 17.If the trigger element 30 melts or bursts under the influence of heat, the closure element 25 is released and can be pushed out of the outlet opening 24 under the pressure of the extinguishing agent. Two dashed lines 31 and 32 mark the axial position of the elements shown in the . Figure 3a and 3b shown cross sections 33 and 34 through the sprinkler 17.

[0030] Figure 3a shows a cross section 33 through the sprinkler 17 at the Figure 2by the axial position marked by line 31. The cross-section 33 extends in a plane perpendicular to the sprinkler axis 22 and comprises three partial areas, one partial area each being assigned to the two support columns 27 of the support element 26 and another partial area being assigned to the trigger element 30. The maximum longitudinal extent 48 of the cross-section results from the distance between the support columns 27 and the diameter of the support columns 27, with the maximum transverse extent 47 corresponding to the diameter of one support column 27. Figure 3b shows a cross section 34 through the sprinkler 17 at the Figure 2 axial position marked by line 32. The cross-section 34 extends in a plane perpendicular to the sprinkler axis 22 and shows the contours of the retaining web 28 and the spray disc 29. The maximum longitudinal extent 48 of the cross-section corresponds to the length of the retaining web 28 and compensates for the maximum longitudinal extent 48 of the cross-section 33. Figure 3a; the maximum transverse dimension 49 corresponds to the diameter of the spray plate 29.

[0031] Figure 4 shows a plan view of the shielding hood 18 according to the invention. The shielding hood 18 comprises a three-dimensionally shaped collar 35 and a flat base surface 36. An imaginary hood axis 42 (cf. Figure 5) stands perpendicular to the flat base surface 36. The shielding cap 18 comprises an opening 37; the opening 37 is arranged in the flat base surface 36 and has a substantially oval contour. The opening 37 can be characterized by a transverse extension 38 and a longitudinal extension 39. The opening 37 is designed to be slipped over the distal end of the sprinkler 17 in the manner according to the invention. The shielding cap 18 comprises two holes 40 arranged in the flat base surface 36, which are provided with fastening projections distributed over the circumference; the holes 40 are designed to fasten the shielding cap 18 in the sprinkler system 16. When a bolt is inserted into one of the holes 40, the diameter of which is slightly larger than the contour spanned by the fastening projections, the fastening projections are spread and rest under tension on the circumference of the bolt.The holding force applied by the fastening projections is sufficient to hold the shielding hood 18 in position.

[0032] Figure 5 shows a sprinkler 17 and a shielding hood 18 according to the invention in a shielded state. The sprinkler 17 is arranged in the opening 37, so that the shielding hood 18 encloses the sprinkler 17 between the proximal sprinkler end 20 and the trigger element 30. In the embodiment shown, the shielding hood 18 encloses the sprinkler 17 in a section of the base element 23. The sprinkler axis 22 and the hood axis 42 run substantially parallel to each other. According to the orientation of the Figure 5The shielding hood 18 can be arranged upwards from the triggering element 30 in the direction of gravity, so that the shielding hood 18 can shield extinguishing agent coming from above from the triggering element 30. The gap size of a gap 41 in the opening 37 between the shielding hood 18 and the sprinkler 17 is small compared to the dimensions of the opening 37.

[0033] Figure 6shows a sprinkler 17 that is attached to an extinguishing agent supply line 15 by a mounting bracket 19. The mounting bracket 19 is U-shaped and bent from above around the extinguishing agent supply line 15 and comprises two straight, bolt-shaped sections 43 that project downwards just below the extinguishing agent supply line 15. The bolt-shaped sections 43 correspond to recesses in the base element 23 of the sprinkler 17. At the ends, the bolt-shaped sections 43 include threads 44; the sprinkler 17 is clamped against the mounting element 19 and against the extinguishing agent supply line 15 by means of nuts 45 that are screwed onto the threads 44.

[0034] Figure 7 shows a sprinkler system 16 according to the invention on an extinguishing agent supply line 15. Compared to the Figure 6In the state shown, a shielding hood 18 according to the invention, coming from the distal sprinkler end 21, was slipped over the sprinkler 17 with the opening 37 and moved into a shielding state. In the shielding state, the bolt-shaped sections of the fastening bracket 19 engage with the fastening projections of the holes 40 of the shielding hood 18, whereby the shielding hood 18 is fastened in the sprinkler system 16 opposite the sprinkler 17 and opposite the extinguishing agent supply line 15. The opening 37 in the shielding hood 18 is in the Figure 7 shown shielding state is arranged relative to the extinguishing agent supply line 15 such that a gap 41 between the shielding hood 18 and the sprinkler 17 is covered upwards in the direction of gravity by the extinguishing agent supply line 15.

Claims

1. Sprinkler system (16) for a fire-extinguishing system (14) having multiple sprinklers (17, 46), wherein the sprinkler system (16) comprises a sprinkler (17) and a shielding hood (18), wherein the sprinkler (17) comprises a trigger element (30) and a base element (23), wherein the shielding hood (18) is configured to shield the trigger element (30) from extinguishing agent from neighbouring sprinklers (46), wherein a proximal sprinkler end (20) is connectable to an extinguishing-agent-supply line (15), wherein the base element (23) is arranged at the proximal sprinkler end (20), wherein the trigger element (30) is arranged between the proximal sprinkler end (20) and a distal sprinkler end (21), wherein the shielding hood (18) comprises an opening (37) with a closed perimeter, wherein, in a shielding state of the sprinkler system (16), the sprinkler (17) is arranged in the opening (37) such that the shielding hood (18) surrounds the sprinkler (17) between the proximal sprinkler end (20) and the trigger element (30), wherein the base element (23) defines a stop position in the direction of the proximal sprinkler end (20) such that the shielding hood is not displaceable beyond the proximal sprinkler end (20) from the shielding state, and wherein the opening (37) is dimensioned in such a way that, in a mounting state of the sprinkler system (16), the shielding hood (18) is movable by way of displacement of the opening (37) surrounding the sprinkler (17) from the shielding state beyond the distal sprinkler end (21) along a mounting portion of the sprinkler (17), wherein the mounting portion comprises sprinkler portions with a small cross section, characterized in that the mounting portion comprises sprinkler portions with a large cross section that are able to be overcome, wherein a sprinkler portion with a small cross section is a sprinkler portion whose cross section is arrangeable in the opening of the shielding hood (18) with a longitudinal axis of the sprinkler (17) and a hood axis of the shielding hood (18) oriented substantially parallel to one another, wherein a sprinkler portion with a large cross section is a sprinkler portion whose cross section is larger than a cross section of the opening with the longitudinal axis of the sprinkler and the hood axis oriented substantially parallel to one another, wherein a sprinkler portion with a large cross section is able to be overcome if the opening is able to be moved past the sprinkler portion with a large cross section by way of additional tilting of the shielding hood (18).

2. Sprinkler system (16) according to Claim 1, wherein the shielding hood (18) comprises a planar portion (36).

3. Sprinkler system (16) according to either of Claims 1 and 2, wherein the shielding hood (18) comprises a three-dimensional portion (35).

4. Sprinkler system (16) according to one of Claims 1 to 3, wherein the shielding surface (35, 36) comprises a planar base (36) and a three-dimensional collar (35).

5. Sprinkler system (16) according to one of Claims 1 to 4, wherein the sprinkler (17) comprises a spray plate (29), wherein the spray plate (29) is arranged at the distal sprinkler end (21).

6. Sprinkler system (16) according to Claim 5, wherein the shielding hood (18) is displaceable over the spray plate (29) even though a transverse extent (38) of the opening (37) in the shielding hood (18) is smaller than a transverse extent (49) of the spray plate (29).

7. Sprinkler system (16) according to one of Claims 1 to 6, wherein the shielding hood (18) can be arranged upwardly beyond the trigger element (30) in the direction of gravity in the shielding state.

8. Sprinkler system (16) according to one of Claims 1 to 7, wherein, in the shielding state, the sprinkler (17) can be arranged in the opening (37) of the shielding hood (18) relative to the shielding hood (18) in such a way that a hood axis (42) and a sprinkler axis (22) are oriented parallel to one another.

9. Sprinkler system (16) according to one of Claims 1 to 8, wherein the base element (23) can be arranged in the opening (37) of the shielding hood (18) in the shielding state.

10. Sprinkler system (16) according to one of Claims 1 to 9, wherein, in the shielding state, the opening (37) in the shielding hood (18) can be arranged in relation to a further component (15, 23) of the fire-extinguishing system (14) in such a way that a gap (41) between the shielding hood (18) and the sprinkler (17) is covered by the further component (15, 23) upwardly in the direction of gravity.

11. Sprinkler system (16) according to one of Claims 1 to 10, wherein, for the fastening of the shielding hood (18), use may be made of fastening structures (19, 43, 44) which serve for fastening the sprinkler (17) to the extinguishing-agent-supply line (15).

12. Sprinkler system (16) according to one of Claims 1 to 11, wherein the sprinkler (17) is able to be clamped against the extinguishing-agent-supply line (15) by way of a fastening element (19), wherein the shielding hood (18) can be fastened to the ends of the fastening element (19).

13. Sprinkler system (16) according to one of Claims 1 to 12, wherein the shielding hood (18) comprises fastening holes (40) which are configured for fastening the shielding hood (18) in the sprinkler system (16).

14. Method for mounting a shielding hood (18) in a sprinkler system (16) according to one of Claims 1 to 13, wherein the sprinkler (17) is in a state connected at the proximal sprinkler end (20) to an extinguishing-agent-supply line (15), and wherein the opening (37) of the shielding hood (18), proceeding from a separation state, in which the sprinkler (17) is not arranged in the opening (37) of the shielding hood (18), is slipped over the distal sprinkler end (21) and, by way of displacement of the opening (37) surrounding the sprinkler (17), is displaced or tilted relative to the sprinkler (17) until the shielding state has been reached.

Images