EP2893959A1 - Extinguishing nozzle head - Google Patents

Abstract

The invention relates to an extinguishing nozzle head for generating a mist of extinguishing fluid with a housing (11) in which an inflow opening (12) receiving the extinguishing fluid is provided, having a flow (13) arranged in the housing (11) and communicating with the inflow opening (12). 12), nozzle channels (14, 15, 16) extending from the flow, each having at least one nozzle opening (17, 18, 19) releasing a mist of extinguishing fluid, the nozzle channels being opposite a central axis (26) of the nozzle Housing (11) are executed incidentally, wherein circumferentially nozzle channels are arranged summarized at a level to a row of nozzles, wherein at least two rows of nozzles are provided, wherein at least one row of nozzle nozzle channels (14, 15, 16) seen from the top of the extinguishing nozzle head above a another row of nozzle channels (14, 15, 16) is arranged. It is provided that the upper row of nozzles has substantially at least twice as many nozzle channels as the lowermost row, and that the nozzle channels (14, 15, 16) of the uppermost row substantially at a right angle to the central axis (26) of the housing (11 ) are arranged.

Description

The invention relates to an extinguishing nozzle head for generating a mist of extinguishing fluid with a housing in which an extinguishing fluid receiving inflow opening is provided with a flow arranged in the housing, which is connected to the inflow opening, wherein the flow outgoing nozzle channels are provided, the each having at least one nozzle opening releasing a mist of extinguishing fluid, wherein the nozzle channels are designed incidentally with respect to a central axis of the housing, wherein circumferentially nozzle channels are arranged summarized at a level to a row of nozzles, wherein at least two rows of nozzles are provided, wherein at least one row of nozzles nozzle channels of seen from the top of the extinguishing nozzle head is arranged above a further row of nozzle channels.

Fire fighting with the help of water mist is well known. In this form of fire fighting extinguishing fluid, preferably water, finely dusted by a nozzle, so that the smallest water droplets with diameters between 10 .mu.m and some 100 .mu.m arise. These small water droplets are discharged from the extinguishing nozzle with the help of high pressure and directed to a source of fire. As a result, a strong cooling of the fire is achieved, whereby a good fire fighting is possible. In addition, with the help of the mist, an enclosure of the source of fire is possible, such that the oxygen supply of the fire is impaired.

In designing the nozzles as well as the nozzle heads, great importance has been attached in the past to producing the mist by means of so-called nozzle inserts. In this case, nozzle inserts are screwed into extinguishing nozzle heads. The nozzle inserts have small nozzle openings through which the extinguishing fluid can escape. Upon exiting the nozzle opening, the extinguishing fluid is torn open, causing the mist droplets. However, the use of nozzle inserts is complex and expensive, so that one is looking for cheaper extinguishing nozzle heads.

Here is among others the EP 1 239 926 A1 to call. This describes a quenching nozzle head, wherein the nozzle openings are drilled by drilling into the extinguishing nozzle head. In order to produce an even, evenly distributed and fine mist pattern, it is proposed to arrange two concentric bores in succession in the direction of flow, so that the fluid jet emerging from a first bore and tearing therefrom strikes the wall of the second bore, which is to be achieved the mist is split even finer. The disadvantage here, however, that only a conical spray pattern can be generated by the concentric holes. It is also disadvantageous that significant kinetic energy is lost as a result of the impact of the fluid droplets on the inner wall of the second bore, and the spray jet only has a low penetrating force. This is especially critical for the deposition of flue gases.

From the DE 10 2008 021 925 A1 an extinguishing nozzle head is known in which spray nozzles arranged circumferentially to a row are each arranged perpendicular to the lateral surface of the spray head. This upper row of nozzles releases the extinguishing fluid onto an existing deflector, which redirects the extinguishing fluid and fuzzes it into a mist. Below the spray nozzles additional nozzles are arranged in a groove, which emits the extinguishing fluid in a spray angle away from the extinguishing nozzle head in the radial direction. The two streams cross near the deflector, increasing fogging and creating a conical nebula. The pressure of the extinguishing fluid is a pressure in the amount of 6 to 30, preferably above 10 bar, or 30 to 300 bar indicated. Again, it is disadvantageous that significant kinetic energy is lost by the impact of the fluid droplets on the deflector and the spray has only low penetration. This is especially critical for the deposition of flue gases.

From the DE 10 2011 102 693 A1 an extinguishing nozzle head is known in which a centrally directed downward nozzle and two rows of nozzles, each of which is designed to be incident with respect to the central axis of the extinguishing nozzle head, are provided. The angle of attack of the nozzles with respect to the central axis should be between 0 and less than 90 degrees, but optimally 20 to 70 degrees. The nozzle openings are arranged in circumferential groove-shaped flow channels, which have different dimensions in the longitudinal and transverse directions, whereby an asymmetric spray pattern is to arise.

All of the aforementioned embodiments, the difficulty inherent in the case of fire, the exhaust fumes sufficiently precipitate when the energy of the extinguishing fluid is low, for example, at low extinguishing fluid pressure. Furthermore, they are all connected in sections so that groups of extinguishing nozzle heads are always activated in the activation case.

Accordingly, the invention has for its object to provide a quenching nozzle head, in which in a particularly simple manner, a spray with high penetration even at low extinguishing fluid energy or at low extinguishing fluid pressure can be generated, which is just suitable for depositing flue gases at low fluid pressures ,

Surprisingly, this object is achieved particularly simply by virtue of the fact that the upper nozzle row has substantially at least twice as many nozzle channels as the lowermost row, and that the nozzle channels of the uppermost row are arranged essentially at a right angle to the central axis of the housing.

It has been found that particularly good firefighting results are achieved by such an arrangement and that particular results are achieved with regard to the deposition of flue gases.

An advantageous teaching of the invention provides that at least one recessed in the outer surface of the housing of the extinguishing nozzle head flow channel is provided, in which a nozzle channel opens and in which a nozzle opening is provided. This supports the formation of fog.

Furthermore, it is advantageous that a closure element can be arranged in at least one nozzle channel and / or flow channel, wherein a thread for receiving a threaded plug is preferably provided for the arrangement in the nozzle channel and / or flow channel. By providing closure elements, it becomes possible to generate the mist in a directed manner. In particular, in the case of the right-angled outer nozzle channels, it is advantageous, for example in the case of a wall insert of the extinguishing nozzle heads, to close certain areas, in particular the channels directed towards the ceiling of the room.

Another teaching of the invention provides that at least five nozzle channels are arranged to the bottom nozzle row. It has been shown that it is particularly advantageous for an insert of the extinguishing nozzle head at low pressures, such an arrangement, since this directs the direct focus on the fire mist formation is improved.

Another teaching of the invention provides that a first row of nozzles is provided with at least one nozzle channel, which has a first angle relative to the central axis of the housing, that a second row of nozzles with at least one nozzle channel is provided, which is arranged above the first nozzle row seen from the top of the extinguishing nozzle head, and in which the nozzle channel with respect to the central axis of the housing has a second angle, that a third nozzle row is provided with at least one nozzle channel, which is above the second nozzle row of the tip of the extinguishing nozzle head is arranged, and in which the nozzle channel with respect to the central axis of the housing has a third angle, that the first angle is smaller than the second angle and the second angle is smaller than the third angle, and that the third angle in Is substantially perpendicular to the central axis. This causes optimal fogging. It is additionally advantageous that the nozzle channels of the third row of nozzles are arranged offset radially with respect to the second row of nozzles and / or that more nozzle channels are provided in the second row of nozzles than in the first and third rows of nozzles. By providing that in the second nozzle row more nozzle channels are provided as in the first and third nozzle row, a defined fog cone is created, which is quickly closed, whereby a particularly good extinguishing effect is achieved.

A further teaching of the invention provides that a movement element, preferably a piston, is provided in the inflow opening and / or in the flow, which in a first position the inflow opening and / or the flow against a flow of extinguishing fluid through the inflow opening and / or blocks the flow and releases in a second position the inflow opening and / or the flow for the flow of extinguishing fluid through the inflow opening and / or the flow. It is further advantageous that the movement element has a portion which remains in the second position in the inflow opening, wherein the portion particularly preferably has recesses for overflow through the extinguishing fluid. As a result, a secure closing of the extinguishing nozzle head or an optimal extinguishing fluid supply is ensured in a simple manner. The movement element makes it possible to activate only individual extinguishing nozzles.

A further teaching of the invention provides that the movement element has a receptacle for a triggering ampoule, and / or that the movement element has a recess for a sealing element, preferably an O-ring.

A further teaching of the invention provides that a triggering ampoule is provided, wherein triggering ampoule is preferably protected by a housing provided on the protective element against mechanical damage, which is particularly preferably an integrally provided on the housing protective element formed of webs, which at one endpoint connected to each other, which is provided an abutment for the triggering pulley. As a result, the trigger ampoule is easily protected against mechanical damage. If a movement element is provided as described above, then it is advantageous for a receptacle for the release ampoule to be provided on the movement element, preferably on its front side. The provision of a trigger pulley allows for easy activation of the Extinguishing nozzle head. The combination of trigger pulley and moving element, it is possible that only extinguishing nozzle heads are activated, in which actually the Auslöseampulle is activated by the heat. As a result, extinguishing water damage is minimized. The combination of a triggering ampule with a quenching nozzle head allows for a smaller tube width of the conduit system feeding the quenching fluid, since only the quenching nozzle heads activated by their triggering ampoule need to be supplied.

The extinguishing nozzle head has a housing with an outer surface.

Furthermore, the object of the invention is achieved by the use of a previously described extinguishing nozzle head for generating a mist for fire fighting with an application of a pressurized extinguishing fluid, wherein the pressure is between 4 and 16 bar. It has surprisingly been found that such use allows optimal fogging and thus optimal fire fighting.

Fig. 1

eine teilgeschnittene Explosionsansicht des erfindungsgemäßen Löschdüsenkopfes

Fig. 2

eine Detailansicht zu Fig. 1, und

Fig. 3

eine Draufsicht auf den erfindungsgemäßen Löschdüsenkopf.

The article will be explained in more detail with reference to drawings showing an exemplary embodiments. Showing:

Fig. 1

a partially cutaway exploded view of the extinguishing nozzle head according to the invention

Fig. 2

a detailed view too Fig. 1 , and

Fig. 3

a plan view of the extinguishing nozzle head according to the invention.

Fig. 1 shows an exploded view of a quenching nozzle head 10 with a housing 11 in which an inlet opening 12 is provided as the inflow bore. Preferably, the extinguishing nozzle head 10 is formed of stainless steel, but may be formed of other iron alloys as well as copper alloys. The inflow bore 12 opens into a distribution chamber 13 formed as a flow. Starting from the distribution chamber 12, nozzle channels 14, 15, 16 extend. The nozzle channels 14, 15, 16 open into nozzle openings 17, 18, 19. The nozzle openings 17, 18, 19 are arranged in flow channels 20, 21, which are designed as bores.

The nozzle channels 14, 15, 16 are arranged in rows of nozzles 30, 31, 32. The first nozzle row 30 has an angle α with respect to the central axis 26. The second nozzle row 31 has an angle β with respect to the central axis. The third nozzle axis 3 has an angle γ with respect to the central axis 26. The angles .alpha., .Beta.,. Gamma are in a relationship to one another, where .alpha. Is smaller than .beta. Small .gamma. According to the invention, γ is essentially 90 degrees.

At the rear end of the distribution chamber 13, the inflow bore 12 connects. The inflow bore 12 surrounding part of the housing 11 is provided with a thread 22nd Mistake. At the front end of the distribution chamber 13, a receiving bore 23 is provided, which has a hole 24 designed as a holder at its front end. The bore serves to receive a triggering ampoule 25, which in the assembled state (not shown) of the extinguishing nozzle head 10 is also arranged in the receiving bore 23. The receiving bore 23 is surrounded by webs 27 having openings 28 between them, through which the heat of a fire can reach the triggering ampoule 25. These openings 28 are as out Fig. 3 can be seen, formed by holes 29 which are introduced parallel to the receiving bore 23 in the housing 11. In this bore 29 and the nozzle opening 17 of the nozzle channel 14 is arranged. The webs 27 form a protective element 33 for the triggering ampoule 25.

Fig. 1 shows that the second and third rows of nozzles 31, 32 are arranged in the direction of the longitudinal axis 26 parallel to each other. Fig. 3 shows alternatively that the second and third rows of nozzles 31, 32 are arranged offset in the direction of the longitudinal axis 26 to each other.

The distribution chamber 13 expands outgoing from the inflow bore 12, in which the rear wall surface 34 of the distribution chamber 13 fanned out conically. On the opposite side of the distribution chamber 13, the front wall surface 35 also connects conically to the receiving bore 23.

Within the inflow bore, a moving member 36 is provided in the form of a piston. This piston 36 has a rear portion 37, which has a diameter 38 which is substantially identical to the diameter 39 of the inflow bore, and a front portion 40, which has a diameter 41 which is substantially equal to the diameter 42 of the receiving bore 23rd is identical. Furthermore, the rear portion 37 has a recess 43 which has, at its lateral boundary, wall sections 44 which are separated from recesses 45. Also at the rear portion 37, a channel 46 is provided, in which a sealing element 47, here in the form of an O-ring can be arranged. The transition from the rear portion 37 to the front portion 40 via a conical portion 48. The conical portion 48 thereby falls substantially identical to the front wall surface 35 of the distribution chamber 13 a. At the front end of the front portion 40, a bore 49 is provided, into which in the assembled state (not shown) of the extinguishing nozzle head 10, the triggering ampoule 25 is inserted.

Behind the piston 36 in the installed state (not shown) in the inflow bore 12, a sieve 50 against contamination / foreign body entry into the erasing head 10 and a clamping ring 51 for positioning the sieve 50 are arranged. At the same time prevent sieve 50 and clamping ring 51 that the piston 36 may fall out of the inflow bore 36, for example during assembly.

In the assembled, not triggered state, the triggering ampule 25 is located in the receiving bore 23. The front end of the triggering ampule 25 is located in the bore 24. The rear end of the trigger ampoule is located in the bore 49 of the piston 36. The trigger ampoule thus forms the abutment for the piston 36th

The rear portion 37 is located in the inlet bore 12. The compressible O-ring 47 is disposed in the channel 46, is pressed with its outer wall against the wall surface of the inflow bore 12 and seals this against the in the line (not shown) into which the extinguishing nozzle head is screwed, located extinguishing fluid from. Behind the rear portion 37, the sieve 50 and the clamping ring 51 is arranged.

Due to the rising temperature in case of fire, the alcohol in the triggering ampule 25 expands and causes the glass of the triggering ampoule to burst. As a result, the front abutment of the piston 36 falls away and the pressurized quench fluid pressure pushes the piston forward until the conical surface 48 of the piston abuts the conical front wall surface. The rear portion 37 of the piston 36 is in this position still in the inflow bore 13, which also serves as a guide of the piston 36. The extinguishing fluid now flows in the activation case of the recess 43 through the recesses 45, which now form a connection between the inflow bore 12 and the distribution chamber 13, in the distribution chamber 13 a. From the distribution chamber 13, the extinguishing fluid flows at an angle at an angle to the longitudinal axis 26 of the extinguishing nozzle head 10 through the nozzle channels 14, 15, 16. The extinguishing fluid flows with laminar flow into the distribution chamber and from there through the nozzle channels 14, 15, 16. Immediately after exiting From the nozzle openings 17, 18, 19, the laminar flow of the extinguishing fluid changes into a turbulent flow. The extinguishing fluid breaks into a turbulent spray jet and is conveyed, inter alia, via the flow channels 20, 21 or through the bore 29 to the outside, where it forms a mist.

In the case of wall mounting, threads (not shown) are provided in the extinguishing nozzle heads 10 in the flow channels 20, 21 which point in the direction of the ceiling, into which plugs (not shown) can be screwed. <B> LIST OF REFERENCES: </ b> 10 Extinguishing nozzle head 40 Front section 11 casing 41 diameter 12 Inflow / inflow bore 42 diameter 13 Flow / distribution chamber 43 deepening 14 nozzle channel 44 wall section 15 nozzle channel 45 recess 16 nozzle channel 46 channel 17 nozzle opening 47 Seal / O-ring 18 nozzle opening 48 Conical section 19 nozzle opening 49 drilling 20 flow channel 50 scree 21 flow channel 51 clamping ring 22 thread 23 location hole α angle 24 drilling β angle 25 release ampoule γ angle 26 central axis 27 Steg / cage element 28 opening 29 drilling 30 nozzle row 31 nozzle row 32 nozzle row 33 protection element 34 rear wall surface 35 front wall surface 36 Mover / piston 37 Rear section 38 diameter 39 diameter

Claims (11)

Extinguishing nozzle head for generating a mist of extinguishing fluid with a housing (11) in which an inflow opening (12) receiving the extinguishing fluid is provided with a flow (13) arranged in the housing (11) and connected to the inflow opening (12) , wherein from the flow outgoing nozzle channels (14, 15, 16) are provided, each having at least one of a mist of extinguishing fluid releasing nozzle opening (17, 18, 19), wherein the nozzle channels relative to a central axis (26) of the housing (11) are executed incidentally, wherein circumferentially nozzle channels are arranged summarized at a level to a row of nozzles, wherein at least two rows of nozzles are provided, wherein at least one row of nozzle nozzle channels (14, 15, 16) seen from the top of the extinguishing nozzle above a further row of nozzle channels (14, 15, 16) is arranged, characterized in that the upper nozzle row substantially at least twice have many nozzle channels as the bottom row, and that the nozzle channels (14, 15, 16) of the top row are arranged substantially at a right angle to the central axis (26) of the housing (11). Extinguishing nozzle head according to claim 1, characterized in that at least one in the outer surface of the housing (11) of the extinguishing nozzle head (10) springing back arranged flow channel is provided, in which a nozzle channel (14, 15, 16) opens and in which a nozzle opening (17, 18, 19) is provided. Extinguishing nozzle head according to claim 1 or 2, characterized in that in at least one nozzle channel (14, 15, 16) and / or flow channel (20, 21) a closure element can be arranged, wherein preferably for the arrangement of the closure element in the nozzle channel (14, 15, 16) and / or flow channel (20, 21) is provided a thread for receiving a threaded plug. Extinguishing nozzle head according to one of claims 1 to 3, characterized in that at least five nozzle channels are arranged to the bottom nozzle row. Extinguishing nozzle head according to one of claims 1 to 4, characterized in that a first row of nozzles with at least one nozzle channel (14, 15, 16) is provided, which relative to the central axis (26) of the housing (11) has a first angle that a second Nozzle row with at least one nozzle channel (14, 15, 16) is provided, which is arranged above the first nozzle row seen from the top of the extinguishing nozzle head, and in which the nozzle channel (14, 15, 16) relative to the central axis (26) of the housing (11) has a second angle, that a third row of nozzles is provided with at least one nozzle channel (14, 15, 16), which is arranged above the second row of nozzles seen from the top of the extinguishing nozzle head, and wherein the nozzle channel (14, 15 , 16) relative to the central axis (26) of the housing (11) has a third angle, that the first angle is smaller than the second angle and the second angle is smaller than the third angle, and s is the third angle substantially perpendicular to the central axis (26). Extinguishing nozzle head according to claim 5, characterized in that the nozzle channels (14, 15, 16) of the third row of nozzles are arranged radially offset from the second row of nozzles, and / or that in the second row of nozzles more nozzle channels (14, 15, 16) than in the first and third nozzle row are provided. Extinguishing nozzle head according to one of claims 1 to 6, characterized in that in the inflow opening (12) and / or in the flow (13) a moving element (36), preferably a piston, is provided which in a first position the inflow opening (12). and / or the flow (13) against a flow of the extinguishing fluid through the inflow opening (12) and / or the flow (13) blocks and in one second position the inflow opening (12) and / or the flow (13) for the flow of extinguishing fluid through the inflow opening (12) and / or the flow (13) releases. Extinguishing nozzle head according to claim 7, characterized in that the movement element (36) has a portion (37) which remains in the second position in the inflow opening, wherein the portion, particularly preferably recesses (45) for overflow through the extinguishing fluid. Extinguishing nozzle head according to claim 7 or 8, characterized in that the movement element (36) has a receptacle (49) for a triggering ampoule (25), and / or that the movement element (36) has a recess (46) for a sealing element (47), preferably has an O-ring, Extinguishing nozzle head according to one of claims 1 to 9, characterized in that a triggering ampoule (25) is provided, wherein the triggering ampoule (25) is preferably protected from mechanical damage by a protective element (52, 27) provided on the housing (11) more preferably, there is a protective member (33) integrally formed on the housing (11) and formed of webs (27) interconnected at an end point provided as an abutment (24) for the triggering ampoule (25). Use of an extinguishing nozzle head according to one of claims 1 to 10 for producing a fire-fighting mist with a pressurized extinguishing fluid, the pressure being between 4 and 16 bar.

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