Extinguishing nozzle adapter for fitting an extinguishing nozzle to a wall, and firefighting system comprising said extinguishing nozzle adapter

Abstract

The invention relates to an extinguishing nozzle adapter (1) for fitting an extinguishing nozzle (7) to a wall, comprising a housing (3) and a chamber (15) for accommodating an extinguishing nozzle (7), the housing (3) having an extinguishing agent connection (17) to the chamber (15), via which extinguishing agent connection the chamber (15) can be pressurised with extinguishing agent, the chamber (15) being designed to movably accommodate the extinguishing nozzle (7) in such a way that the extinguishing nozzle (7) can be moved back and forth between a first, retracted position and a second, advanced position, and is moved in the direction of the advanced position when the chamber (15) is pressurised by means of the extinguishing agent.

Description

[0001] The present invention relates to a fire extinguishing nozzle adapter for mounting a fire extinguishing nozzle on a wall. In particular, the invention relates to such a fire extinguishing nozzle adapter for mounting on a wall of a room from outside the room, wherein the wall has a corresponding recess for receiving the fire extinguishing nozzle in order to introduce extinguishing agent into the room through the wall recess.

[0002] It is often necessary or desirable to route the extinguishing agent supply from fire nozzles to a room in such a way that the supply line itself runs outside the room. However, the fire nozzles must at least be positioned with their extinguishing agent outlets so that they can also supply the interior of the room with extinguishing agent. Therefore, the fire nozzles usually extend completely or at least partially within the room.

[0003] However, mounting the nozzle from the inside of a room is particularly difficult if the room is narrow, and especially if the room is a duct, such as a ventilation duct for gaseous mixtures like room air or cooking fumes. Therefore, depending on the available space, the option of mounting the extinguishing nozzle on the outside of the wall is used, allowing it to extend into the room through a suitable opening in the wall.

[0004] Solutions to this problem are generally known, such as those described in WO 2004 / 075995 A1. However, these known solutions share the disadvantage that the extinguishing nozzle, when mounted, has a fixed position in which it extends at least partially into the room and protrudes into it. This means that the extinguishing nozzle itself creates an obstruction to airflow within the room. The narrower the space, the more pronounced this obstruction becomes. Therefore, particularly when it is desirable to have unimpeded circulation of the gaseous mixture in the room, for example in flow-through ducts, there is a need to improve existing mounting methods.

[0005] US 2016 / 303591 A1 concerns a housing for a nozzle of a dust control system. A nozzle is movably mounted inside the housing and connected to a fluid line for generating the spray mist. A system gas line is also connected to the housing, through which gas is introduced into the interior of the housing during nozzle operation. This gas moves the nozzle from its retracted position to its extended position within the housing.

[0006] EP 1 537 918 A1 discloses a valve for washing ships with water jets. The valve comprises a body on which a fixed outlet of a washing nozzle is formed and a movable closure, which has a plate part, is received.

[0007] WO 2004 / 091727 A1 relates to a fire suppression system that is installed externally on buildings. The system comprises a roof sprinkler designed as a pop-up sprinkler, consisting of an outer pipe and an inner pipe movably mounted within the outer pipe, with a cap having an opening at the free end of the inner pipe that protrudes from the outer pipe.

[0008] DE 692 21 149 T2 discloses a fire-fighting device comprising a number of sprinklers with extinguishing nozzles arranged in the ground. The sprinklers are movably mounted on a holder and covered by a cover when inactive.

[0009] The invention was therefore based on the objective of providing a fire extinguishing nozzle adapter of the type described above, which overcomes the disadvantages described above as far as possible.

[0010] The invention solves the underlying problem in such a fire extinguishing nozzle adapter according to the features of claim 1. A movable fire extinguishing nozzle is provided in the housing along a longitudinal axis, wherein the chamber is arranged for the movable reception of the fire extinguishing nozzle in such a way that the fire extinguishing nozzle can be moved back and forth between a first, retracted position and a second, advanced position and is moved in the direction of the advanced position when the chamber is pressurized by means of the extinguishing agent.

[0011] The invention is based on the premise that the extinguishing nozzle only needs to extend into the room when it is actually being used for extinguishing. For the vast majority of the time in practice when the extinguishing nozzle remains inactive, its presence inside the room is unnecessary. The invention builds on this premise and allows the extinguishing nozzle to occupy less, or preferably no, room volume in the retracted position, while in the extended position it projects further into the room and can discharge extinguishing agent directly into the room.

[0012] According to the invention, the pressure of the extinguishing agent in the chamber itself is used to move the extinguishing nozzle from the retracted position to the extended position. Therefore, no additional driving force, for example electrical or pneumatic, is necessary to move the nozzle into the extended position. As soon as extinguishing agent enters the chamber, the pressure of the extinguishing agent exerts a force on the extinguishing nozzle in the direction of the extended position.

[0013] The invention is further developed in that the extinguishing nozzle adapter has a return spring which is operatively connected to the extinguishing nozzle and is configured to exert a return force on the extinguishing nozzle in the direction of the retracted position. Preferably, the return spring is arranged between the extinguishing nozzle and a corresponding seating surface in the housing of the extinguishing nozzle adapter.

[0014] According to the invention, the return spring is configured to exert a restoring force whenever the extinguishing nozzle is deflected from the retracted position towards the extended position. Particularly preferably, the return spring is pre-tensioned such that it also exerts a spring force on the extinguishing nozzle in the direction of the retracted position when the nozzle is in the retracted position, so that the pre-tension force of the spring must first be overcome to deflect the extinguishing nozzle towards the extended position.

[0015] By selecting the correct restoring force using the restoring spring, a threshold pressure can be defined that must first be overcome before the extinguishing nozzle is advanced towards the forward position. The restoring force is particularly preferably selected such that the threshold pressure lies in a range of 0.5 to 5 bar, and most preferably in a range of 1 to 4 bar.

[0016] According to the invention, the chamber has an extinguishing nozzle end and a cover arranged at that end, which is designed to close the chamber when the extinguishing nozzle is in the retracted position and to release the chamber when the extinguishing nozzle is in the extended position.

[0017] According to the invention, the cover is pivotably arranged on the housing in the form of one or more cover elements between a closed position and an open position, wherein the extinguishing nozzle is configured to displace the cover from the closed position into the open position as it moves towards the advanced position. Preferably, a cover return element is operatively connected to the cover and configured to exert a return force on the cover in the direction of the closed position.

[0018] According to the invention, a movable piston is arranged in the chamber, which is configured for coupling with an extinguishing agent inlet of the extinguishing nozzle and has a through-opening to connect the extinguishing nozzle to the chamber in a fluid-conducting manner. The coupling between the extinguishing nozzle and the piston can be effected indirectly via one or more connecting elements, or directly, for example by screwing the extinguishing nozzle into the piston. The effective surface of the piston is preferably an end face in which the through-opening is arranged.

[0019] In a preferred embodiment, the chamber has an inner wall surface along which the piston is guided in a sliding manner, with a sealing element preferably being arranged between the piston and the chamber wall.

[0020] According to the invention, the return element is connected to the housing on one side and to the piston on the other. The return element is preferably connected to a piston-side seating surface, which is formed on a side facing away from the piston's effective surface.

[0021] In a further preferred embodiment, the housing is designed in multiple parts and preferably has a first housing part which has an extinguishing agent connection for introducing extinguishing agent into the chamber, and a second housing part which has the cover.

[0022] Preferably, the second housing part has a mounting interface for attaching the extinguishing nozzle adapter to the wall. The mounting interface can be designed, for example, as a mounting flange or other drilling pattern.

[0023] In another preferred embodiment, the housing comprises a third housing part, which forms the inner wall surface for guiding the piston. The advantage of the multi-part design of the housing lies essentially in the fact that the component complexity for each individual component is reduced, and machining steps, such as the dimensionally accurate production of the guide surface for the piston, can be performed on a smaller component at a time, thus improving handling during manufacturing.

[0024] According to the invention, a positioning element is arranged on the housing, preferably at the mounting interface, which is representative of the orientation of the extinguishing nozzle inside the housing. Alternatively or additionally, the housing has a first positive locking element, for example a groove, for interacting with a corresponding second positive locking element on the extinguishing nozzle, for example a projection projecting laterally on the extinguishing nozzle.

[0025] This ensures that the extinguishing nozzle can only be mounted in a predetermined orientation within the housing. The positioning element's indication of the housing's orientation relative to the wall thus makes the nozzle's orientation immediately apparent to the installer, eliminating the risk of incorrect nozzle alignment within the duct. This is particularly relevant when, as provided for in the invention, the extinguishing nozzle is to be mounted on the wall from outside the room. The positioning method according to the invention eliminates the need to inspect the interior of the room.

[0026] The invention has been described above with reference to a first aspect relating to the extinguishing nozzle adapter. In a further aspect, the invention relates to a fire-fighting system for fighting fires in a room bounded by a wall, comprising one or more extinguishing nozzles which are mounted in recesses in the wall from outside the room and are configured to introduce extinguishing agents into the room through the wall recesses.

[0027] The invention solves the aforementioned problem in such a fire-fighting system by mounting one, several, or all of the extinguishing nozzles on the wall by means of an extinguishing nozzle adapter designed according to one of the preferred embodiments described above. In particular, the extinguishing nozzle adapter has a housing and a chamber in which an extinguishing nozzle is received, wherein the housing has an extinguishing agent connection to the chamber through which the chamber can be pressurized with extinguishing agent, wherein the extinguishing nozzle is guided longitudinally movably in the housing along a longitudinal axis L and is movable back and forth between a first, retracted position and a second, extended position, and is moved in the direction of the extended position when the chamber is pressurized by means of the extinguishing agent, wherein the chamber has an extinguishing nozzle-side end, and a cover arranged at that end which is configured toto close the chamber when the extinguishing nozzle is in the retracted position, and to release the chamber when the extinguishing nozzle is in the extended position, wherein the cover in the form of one or more cover elements is pivotably arranged on the housing between a closed position and an open position, and wherein the extinguishing nozzle is arranged to displace the cover from the closed position to the open position as it moves towards the extended position.

[0028] The preferred embodiments of the extinguishing nozzle adapter according to the invention are also preferred embodiments of the extinguishing nozzle adapter, and vice versa. To avoid repetition, reference is made to the above explanations.

[0029] The space protected by the fire suppression system is preferably a duct, and particularly preferably an exhaust duct for gaseous mixtures such as room air and / or cooking fumes. Due to the confined space in ducts, the possibility of reliably attaching the extinguishing nozzle is particularly advantageous if, as provided according to the invention, it does not affect the airflow in the space when retracted and can optimally discharge the extinguishing agent into the space when extended.

[0030] Furthermore, according to one of the preferred embodiments described above, incorrect assembly is largely prevented by the use of positioning elements, so that the fire suppression system can be put into operation with less effort and at the same time greater safety against malfunction.

[0031] The invention is described in more detail below with reference to the accompanying figures and preferred embodiments. These figures show: Figure 1a - a fire extinguishing nozzle adapter according to a first embodiment, Figure 2a - a fire extinguishing nozzle adapter according to a second embodiment, Figure 3 - a fire extinguishing nozzle adapter according to a third preferred embodiment, Figure 4 - a fire extinguishing nozzle adapter according to a fourth embodiment, Figure 5 - a fire extinguishing nozzle adapter according to a fourth embodiment, and Figure 6a - your fire extinguishing system with a fire extinguishing nozzle adapter according to the Figuren 1 - 5 .

[0032] Where identical reference numerals are used in the different embodiments, these denote structurally or functionally identical elements. To avoid repetition, reference is made to the respective descriptions of the other figures.

[0033] Figur 1a-e Figure 1 shows a fire extinguishing nozzle adapter 1 according to a first preferred embodiment of the invention. The fire extinguishing nozzle adapter 1 has a housing 3 which is designed for mounting on a wall of a room. A cover 5 is pivotably arranged on the housing. Preferably, a cover return element 6 is arranged between the housing 3 and the cover 5 and is designed to return the cover 5 into the Fig. 1a to return to the indicated locking position if it is deflected.

[0034] Fig. 1b Figure 1 shows the extinguishing nozzle adapter 1 with its cover 5 open. The extinguishing nozzle 7 inserted in the extinguishing nozzle adapter 1 can be seen here, in a forward end position in which, if mounted, it would extend into the area to be extinguished. The extinguishing nozzle 7 is guided lengthwise movably along a longitudinal axis L in the housing 3 of the extinguishing nozzle adapter 1, see Figure 1. Fig. 1d The extinguishing nozzle 7 has a first extinguishing agent outlet 9 and two second extinguishing agent outlets 11, see Fig. 1c The first extinguishing agent outlet 9 extends parallel, and in particular coaxially, to the longitudinal axis L, while the two second extinguishing agent outlets 11 extend at an angle to the longitudinal axis L. Extinguishing agent exits the extinguishing agent outlets 9 and 11 in a region characterized by an opening angle α. The forward position of the extinguishing nozzle 7 is preferably selected such that the discharge of the extinguishing agent in the region of the angle α is not disturbed by the cover 5.

[0035] In Fig. 1d The extinguishing nozzle adapter 1 is shown with the extinguishing nozzle 7 in its retracted position.

[0036] Inside the housing 3 a piston 13 is arranged, which is guided in the direction of the longitudinal axis L and slides movably along an inner wall surface 21.

[0037] The piston 13 and the inner wall surface 21 are arranged in a chamber 15 of the housing 3, which is fluidly connected to an extinguishing agent connection 17, so that pressurized extinguishing agent can flow into the chamber 15 through the extinguishing agent connection 17. Upon flowing into the chamber 15, the extinguishing agent comes into contact with an effective surface 16 of the piston 13, thereby exerting a force on the piston in the direction of the advanced position ( Fig. 1b ) is exercised. Opposite the extinguishing agent inlet 17, the cover 5 is arranged at an end 18 on the extinguishing nozzle side, which is displaced by the extinguishing nozzle 7.

[0038] The piston 13 is provided with a passage opening 19, through which pressurized fluid can also flow into the extinguishing nozzle 7, and from there is conveyed to the extinguishing agent outlets 9,11.

[0039] The piston 13 is guided fluid-tight along the inner wall 21 in the chamber 15 by means of a sealing element 23.

[0040] A return spring 27 is arranged between the piston 13 and the housing 3. The return spring 27 is designed to return the piston 13 to the retracted position ( Fig. 1d ) to move. The retracted position is defined by the contact of the extinguishing nozzle 7 with the housing 3. The advanced position of the extinguishing nozzle 7 is defined by a stop 24, against which the piston 13 comes to rest in its advanced position.

[0041] The housing 3 is constructed in two parts and comprises a first housing part 3a, which has the extinguishing agent outlet 17, and a second housing part 3b, which has the cover 5. A mounting interface 25 in the form of a flange ring is also provided on the second housing part 3b. The extinguishing nozzle adapter is mounted to a wall of a room using the mounting interface 25.

[0042] The extinguishing nozzle 7 and the housing 3 are preferably coupled to each other via corresponding positive locking elements 26, 28, so that the extinguishing nozzle 7 is mounted in a predetermined orientation relative to the housing 3. Furthermore, preferably a marking or similar positioning element (not shown) is provided at the mounting interface 25 or at another location on the outside of the housing 3, by means of which an installer can determine the orientation of the extinguishing nozzle adapter 1. Due to the positive locking coupling between the extinguishing nozzle 7 and the housing 3, with respect to a rotational position of the extinguishing nozzle 7 about the longitudinal axis L, the positioning element on the outside of the extinguishing nozzle adapter simultaneously allows a statement to be made about the orientation of the extinguishing nozzle 7 itself, which minimizes or even eliminates the risk of incorrect installation.

[0043] The extinguishing agent outlets 9, 11 of the extinguishing nozzle 7 are provided in the form of nozzle inserts 31, which are recessed in corresponding recesses 29 in the extinguishing nozzle 7.

[0044] Depending on the application, different or identical inserts 31 can be screwed into the recesses 29 in the extinguishing nozzle 7 in order to exert a desired discharge characteristic of the extinguishing nozzle 7 in the room on which it acts.

[0045] In this context, the correct positioning of the extinguishing nozzle 7 gains additional relevance, or rather, the particular advantage of the unambiguous positioning of the extinguishing nozzle 7 in the housing 3 becomes apparent.

[0046] Fig. 1e Figure 5 shows a detailed view of the cover return element 6 on the outside of the housing 3. The housing 3 has one or more chambers 8, and the cover 5 has corresponding chambers 10. The cover 5 and the housing 3 are coupled to each other by means of a hinge pin 12 that penetrates the chambers 8 and 10. Preferably, the return element 6, in the form of a torsion spring, is arranged between two adjacent chambers 8. The return element 6 allows the housing 3 or the extinguishing nozzle adapter 1 to be installed in any orientation, regardless of gravity. The cover 5 is then held closed by the return spring 6 during vertical, horizontal, or overhead mounting, provided that no extinguishing agent pressure is present in the chamber 15, or that the applied extinguishing agent pressure is insufficient to overcome the return force exerted by the return spring.

[0047] In Fig. 2a, b A fire extinguishing nozzle adapter 1' according to a second embodiment of the invention is shown. In essential design features, the fire extinguishing nozzle adapter 1' corresponds to the fire extinguishing nozzle adapter 1 according to the Figuren 1a-e , so that only the distinguishing features will be discussed below. Thus, an alternative cover 5' is fitted to the extinguishing nozzle adapter 1', which has a first cover element 5'a and a second cover element 5'b, each of which is pivotably arranged as flaps on the housing 3, preferably by means of corresponding return elements 6. The basic kinematics and displacement movement of the cover 5' by the extinguishing nozzle 7 when moved into the advanced position ( fig. 2b ) is the same as in the embodiment according to the Figuren 1a-e The difference shown in 2b is that the two covers 5'a, 5'b do not project as far from the housing 3 in the direction of the longitudinal axis L, so that a larger opening angle α for the extinguishing agent outlets would be possible, or so that a smaller feed would be sufficient to cover the same opening angle α as in the embodiment according to Figuren 1a-e .

[0048] After the housing has been constructed according to the exemplary embodiments shown below. Figuren 1a-e and 2a, b The housing, which was designed in two parts, is in a third embodiment, which in Fig. 3 The housing 3' is shown in three parts. It comprises a first housing part 3'a, which has the extinguishing agent inlet 17, and a second housing part 3'b, which has the cover 5. Furthermore, the housing 3' has a third housing part 3'c, which supports the inner wall 21 in which the piston 13 is guided. Thus, the respective functional sections can be manufactured in specially optimized subprocesses.

[0049] The first and second housing parts 3'a, 3'b are preferably screwed onto a corresponding thread of the third housing part 3'c. Preferably, one or both housing parts 3'a, 3'b can be additionally secured to the third housing part 3'c by means of suitable locking elements 33, for example, set screws.

[0050] Beyond the representation according to Fig. 3 is in Fig. 4 Another embodiment is shown in which the housing 3" is formed in four parts. Besides a first housing part 3"a, which has the extinguishing agent inlet 17, and a second housing part 3"b, which has the cover 5, and a third housing part 3"c, in which the inner wall 21 is formed for guiding the piston 13, the housing 3" comprises a fourth housing part 3"d, which is designed as a union nut for attaching the second housing part 3"b to the third housing part 3"c. The first housing part 3"a is connected to the third housing part 3"c via a separate thread.

[0051] The exemplary implementations of Fig. 1 - 4 What they all have in common is that the covers 5, 5' or cover elements 5'a,b were arranged in a limited manner, but were otherwise fixed in position on the extinguishing nozzle adapter 1, 1', 1" and were each displaced by the extending extinguishing nozzle 7. Fig. 5 A slightly modified preferred embodiment is shown, in which a cover 5" is attached to the extinguishing nozzle 7. At the location where the first extinguishing agent outlet 9 is arranged on the extinguishing nozzle 7, the cover 5" has a recess through which the extinguishing agent can flow. The cover 5" is moved translationally from the first position to the second position together with the head of the extinguishing nozzle 7 when the chamber inside the extinguishing nozzle 7 is pressurized.

[0052] Regarding the otherwise identical functionality and functional design, reference is made to the previous exemplary embodiments.

[0053] The Fig. 1 - 5 Each shows a fire extinguishing nozzle adapter in isolation.

[0054] In Fig. 6 Furthermore, a fire suppression system 100 is shown. The fire suppression system 100 has a supply line 101, which is fed by an extinguishing agent source 109. Preferably, a pump 108 (or several) is provided for this purpose, which is fluidly connected to the extinguishing agent supply 109 and pumps extinguishing agent into the supply line 101 during operation. A pipe network 103, also referred to as a distribution network, is supplied with extinguishing agent via a valve station 102. One or more extinguishing nozzles 7 according to the present invention are installed in the pipe network 103.

[0055] The extinguishing nozzles 7 in the system illustrated here can, for example, be configured as sprinklers according to preferred embodiments of the invention. Such a fire suppression system could, for example, be used as a sprinkler system in the roll-on / roll-off area of ​​ships. Alternatively, the fire suppression system 100 could also be used as a high-pressure spray mist nozzle system in buildings or, for example, for fire suppression in exhaust air systems. For such an application, the fire suppression system 100 is preferably further equipped with one or more fire parameter detectors 105, wherein, according to the invention, a fire parameter is understood to include, for example, electromagnetic radiation, smoke aerosols, or combustion gases, in addition to temperature.

[0056] The detectors 105 are connected to a control center 106 via corresponding signal lines 107.

[0057] If one or more detectors 105 detect the presence of a fire characteristic or the exceeding of a representative threshold value, the control center 106 controls the valve station 102 and initiates the opening of the control valve located there, allowing extinguishing fluid to enter the pipe network 103 and reach the extinguishing nozzles 7.

[0058] If the fire suppression system 100 is operated as a sprinkler system, extinguishing fluid is usually also present in the pipe network when the sprinklers are closed.

[0059] The fire suppression system 100 is designed, for example, to combat fires in or on an exhaust duct 205, such as an exhaust duct for a cooking appliance. Functionally, at least one of the detectors 105 is arranged within the duct 205. The extinguishing nozzle adapters are preferably arranged either in the duct 205 itself, and / or in a hood section 203, cf. Fig. 6b As long as the extinguishing nozzles 7 remain in the first, retracted position within the extinguishing nozzle adapter 1, a picture results as shown, for example, in Fig. 6d Here, the cover 5 is open, and air can flow through the exhaust duct 205 or the hood 203 without obstruction from the extinguishing nozzle 7. However, if a fire occurs, extinguishing agent is discharged to the extinguishing nozzles 7, whereby the extinguishing nozzles 7 move from the retracted position to the second, extended position, cf. Fig. 6c In this position, the extinguishing nozzles 7 extend into the space to which they are assigned, in this case the exhaust duct 205 or the hood 203, and can discharge extinguishing agent in the specified direction. After the discharge of the extinguishing agent has ended, the extinguishing nozzles 7 preferably retract automatically to their initial, retracted position. The Fig. 6a-d The illustrated embodiment applies as an example to all those described in the Fig. 1 - 5 The extinguishing nozzle adapter shown (1, 1', 1") and its functionality are also transferable to other fire suppression systems and other rooms that do not have a channel shape.

[0060] The extinguishing nozzle adapter 1 can be installed from the outside on the wall of the exhaust duct 205 or the hood 203, and aligned as desired.

[0061] In the operation of the extinguishing nozzle adapter 1 according to the invention, or one of the extinguishing nozzle adapters 1', 1" and 1‴ according to the Figuren 1a - 6d The following functional sequence is essentially executed: If a fire needs to be extinguished, pressurized extinguishing agent is introduced from the extinguishing fluid source 109 into the chamber 15 via the fluid inlet 17. As soon as the extinguishing agent pressure in the chamber is high enough to overcome the restoring force of the return spring 27, the piston 13, by advancing the extinguishing nozzle 7, displaces the cover 5 from its closed position to an open position, and the extinguishing nozzle 7 is moved into its extended position. Extinguishing agent can then be discharged, unimpeded by the cover 5, into the room on whose wall the extinguishing agent nozzle adapters 1 or 1', 1" or 1' are mounted. Bezugszeichenliste

[0062] 1, 1', 1", 1‴Extinguishing nozzle adapter 3, 3', 3"Housing 3'a,b,c,dHousing parts 3‴a,b,c,dHousing parts 5, 5"Cover 5a, 5'a,bCover element 6Return element 7Extinguishing nozzle 8, 10Component 9First extinguishing agent outlet 11Second extinguishing agent outlet 12Hinge pin 13Piston 14Extinguishing agent inlet, extinguishing nozzle 15Chamber 16Effective surface 17Extinguishing agent connection 18Extinguishing nozzle side end, chamber 19Passage opening 21Inner wall surface 23Sealing element, piston 24Stop 25Mounting interface 27Return spring 26, 28Positive locking element 29Recess 33Safety element 100Firefighting system 101 Fire extinguishing fluid supply line 102 Valve station 103 Piping network 105 Fire characteristic detector 106 Control center 107 Signal line 108 Pump 109 Fire extinguishing fluid source Longitudinal axis α Opening angle

Claims

1. An extinguishing nozzle adapter (1) for mounting an extinguishing nozzle (7) on a wall, having - a housing (3), - a chamber (15) for receiving an extinguishing nozzle (7), wherein the housing (3) has an extinguishing agent connection (17) to the chamber (15), via which connection (17) the chamber (15) is able to be pressurized with extinguishing agent, and - an extinguishing nozzle (7), which is translationally guided in the housing (3) along a longitudinal axis (L) and has a first extinguishing agent outlet (9) and two second extinguishing agent outlets (11), of which the first extinguishing agent outlet (9) extends parallel to, in particular coaxially with, the longitudinal axis (L), while the two second extinguishing agent outlets (11) extend at an angle to the longitudinal axis (L) such that the extinguishing agent is applied in a predetermined orientation, wherein a movable piston (13) is arranged in the chamber (15), said piston (13) being configured to be coupled to an extinguishing agent inlet (14) of the extinguishing nozzle (7) and having a passage opening (19) for fluid communication between the extinguishing nozzle (7) and the chamber (15) wherein the chamber (15) is configured to receive the extinguishing nozzle (7) in a movable manner such that the extinguishing nozzle (7) is movable back and forth between a first, retracted position and a second, advanced position, and is moved in the direction of the advanced position when the chamber (15) is pressurized by means of the extinguishing agent, and wherein the chamber (15) has an extinguishing-nozzle-side end (18) and a cover (5) arranged at that end (18), said cover being configured to close the chamber (15) when the extinguishing nozzle (7) is in the retracted position and to open up the chamber (15) when the extinguishing nozzle (7) is in the advanced position, and wherein the cover (5), in the form of one or more covering elements, is arranged on the housing (3) so as to be pivotable between a closed position and an open position, and wherein the extinguishing nozzle (7) is configured to displace the cover (5) from the closed position into the open position during its own movement in the direction of the advanced position, and having a return spring (27) which is operatively connected to the extinguishing nozzle (7) and is configured to exert a return force in the direction of the retracted position on the extinguishing nozzle (7), wherein the return spring (27) is connected to the housing (3) on one side and to the piston (13) on the other side, wherein the housing (3) has a first form-fitting element (28), for example a groove, for cooperating with a corresponding second form-fitting element (26) of the extinguishing nozzle (7), for example a protrusion protruding laterally from the extinguishing nozzle (7), and wherein a positioning element is arranged on the housing (3), preferably at the mounting interface (25), said positioning element being representative for the orientation of the extinguishing nozzle (7) inside the housing (3).

2. The extinguishing nozzle adapter (1) as claimed in claim 1, wherein a cover return element (6) is operatively connected to the cover (5) and is configured to exert a return force in the direction of the closed position on the cover (5).

3. The extinguishing nozzle adapter (1) as claimed in claim 2, wherein the chamber (15) has an inner wall surface (21) along which the piston (13) is slidably guided, wherein preferably a sealing element (23) is arranged between the piston (13) and the inner wall surface (21).

4. The extinguishing nozzle adapter (1) as claimed in one of the preceding claims, wherein the housing (3) is configured in a multipart manner, and preferably a first housing part (3a) has the extinguishing agent connection (17) for introducing extinguishing agent into the chamber (15), and a second housing part (3b) has the cover (5).

5. The extinguishing nozzle adapter (1) as claimed in claim 4, wherein the second housing part (3b) has a mounting interface (25) for fastening the extinguishing nozzle adapter (1) to the wall.

6. The extinguishing nozzle adapter (1) as claimed in claim 4 or 5, wherein the housing (3) has a third housing part (3c), which has the inner wall surface (21) for guiding the piston (13).

7. The extinguishing nozzle adapter (1) as claimed in one of the preceding claims, wherein the positioning element is arranged at the mounting interface (25) or another point on the outside of the housing (3).

8. A firefighting system for firefighting in a space bounded by a wall, having one or more extinguishing nozzles (7), which have been mounted in recesses in the wall from outside the space and are configured to introduce extinguishing agent into the space through the wall recess, characterized in that one, several or all of the extinguishing nozzles (7) is / are configured by means of an extinguishing nozzle adapter according to any one of the preceding claims.

9. The firefighting system as claimed in claim 8, wherein the space is a duct, preferably an extractor duct for gaseous mixtures of substances, for example ambient air and / or cooking fumes.

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