DE20004204U1 - Sprinkler with ejection device - Google Patents

Description

COHAUSZ HANNIG DAWIDOWICZ & PARTNERS

PATENT AND LAWYER SKA NZLE I

DÜSSELDORF - BERLIN - MUNICH - PARIS - NANTES

Attorney file 201071-ÜMBRA Berlin, 25.02.2000

Applicant:

umbra engineering company for fire extinguishing systems mbh Zeppelinring 16

D-15711 Schenkendorf

Sprinkler with throw-up device

HG/201071-UMBRA CHDP

Applicant:

umbra engineering company
for fire extinguishing system mbh
Zeppelinring 16
D-15711 Schenkendorf

Sprinkler with throw-up device

The invention relates to a sprinkler with an ejection device for the separate discharge of a fine-droplet or coarse-droplet fluid jet from a fluid line kept under low pressure into rooms, for example living spaces for fighting fires, with a flange-like base body on which a nozzle is provided for connection to the fluid line, holding supports which are attached to the base body so as to protrude therefrom and which carry a deflector with a series of openings for distributing the fluid into the room, and a conically tapering space with a passage opening to the base body for the outlet of the fluid, wherein a closure body blocks the opening against the outlet of the fluid.

Sprinklers with ejection devices for dispensing extinguishing fluid in stationary fire extinguishing systems are well known.
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HG/201071-UMBRA CHDP

DE-A 27 03 459 describes a sprinkler nozzle for standing, hanging and horizontal installation with a nozzle body and a baffle plate which is connected to the nozzle body by at least two supporting elements engaging the edge of the baffle plate and an arrangement which blocks the nozzle mouth when the sprinkler nozzle is in the ready state and which consists of a closure element which sits sealingly on the nozzle mouth and a release element which exerts a closing force on the latter, when the closure element responds, the closing force on the closure element is removed and the latter releases the nozzle mouth for the discharge of the extinguishing water jet. The closure element is provided with an ejection device which, when the closing force is removed, moves away together with the propulsion force of the extinguishing water jet, the ejection device being detachably supported on parts of the sprinkler nozzle which are firmly connected to one another when the nozzle is in the ready position.

DE-A 2 924 654 describes a sprinkler for automatic fire extinguishing systems, consisting of a housing enclosing a flow channel for the fire extinguishing agent, a frame formed from two arms molded onto the housing, which carries a distributor cap, a cover cap closing the flow channel and an assembly arranged between the two caps, which has a lever, a support strut with two side-perforated tabs and a temperature monitor inserted between the tabs. A protruding anti-clamping bracket is provided on the support strut, the longitudinally bent main section of which runs approximately parallel to the strut and which strikes the frame and the distributor cap when the sprinkler is activated.

3
HG/201071-UMBRA CHDP

This and other known solutions (EP-A 0 505 672, US 3 834 463 or US-A 5 505 383) are certainly suitable for applying a coarse droplet spray jet of extinguishing agent in approximately the same amount per unit of time, because on the one hand the diameter of the outlet opening on the sprinklers is fixed and on the other hand the extinguishing agent pressure in the supply line is constant. A variable application of the extinguishing agent, which is desirable depending on the origin and progression of the fire, for example in the form of a fine droplet spray mist in the initial phase and a coarse droplet spray jet in the case of an open flame, cannot be achieved with the known sprinklers.

In the event of a fire, this regularly leads to high water consumption by the stationary extinguishing system, with all the associated disadvantages of over-dimensioning the pumps, pipes and containers for extinguishing agents in the system. Another not insignificant disadvantage of this state of the art is that the damage caused by the water used can lead to the object being protected being rendered completely unusable.

The sprinkler nozzle disclosed in DE-A 36 24 939 produces a spray jet containing small and large drops, namely small drops in a relatively small edge area and large drops in the predominantly central area. This is achieved by having one or more inlet openings upstream of the outlet opening or openings, the overall clear cross-section of which is smaller by a predetermined amount than the overall clear cross-section of the outlet opening or openings. With this known teaching it is indeed possible to

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HG/201071-UMBRA CHDP

It is possible to produce small and large droplets simultaneously in a spray jet, but the temporally separated application of spray mist and spray jets required for dynamic adaptation to the course of the fire is not possible. This means that all of the disadvantages mentioned above also apply to this well-known sprinkler nozzle.

In this state of the art, the invention is based on the object of specifying a sprinkler of the type mentioned at the outset with which it is possible to generate small-droplet spray mists and large-droplet spray jets one after the other at approximately the same operating pressure of the extinguishing agent depending on the origin and progression of the fire, while at the same time minimizing water consumption, reducing water damage in the event of a fire and increasing the efficiency of the fire extinguishing system.

This object is achieved by a device of the type mentioned at the outset with the characterizing features of claim 1.

Advantageous embodiments of the device can be found in the subclaims.

The invention is characterized above all by its simplicity.

In contrast to the known prior art, which is based on a one-piece closure element of constant dimensions and size, and tries to influence the spray pattern of the spray jet by installing additional components such as venturi nozzles, throttles, nipples, the closure element in the invention is designed in several parts, as it were as a closure within a closure.

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Depending on the conditions of the fire, this makes it possible to initially release an inner part of the closure body after a signal is given by a smoke detector or gas detector and to eject a spray-like jet of drops from the opening that is created. If the course of the fire requires the closure to be completely removed from the opening of the sprinkler, another sensor,* for example a heat detector, generates a signal that releases the outer part of the closure body. This expands the diameter of the opening and a coarse spray jet can emerge. In the event of an immediate flaming fire, the locking mechanism according to the invention is ejected in its entirety without the individual locking elements separating from one another.

The sprinkler according to the invention also makes it possible to reduce water consumption for fire fighting and at the same time to sustainably reduce the water damage associated with the uncontrolled release of the extinguishing medium during the fire. The fire extinguishing systems can be better adapted to the dynamics of the fire's origin and progression.

Further advantages and details will become apparent from the following description with reference to the accompanying drawings.

The invention will be explained below using an embodiment
be explained in more detail.

It shows:

Fig. 1 is a side view of the inventive
Sprinklers,

HG/201071-UMBRA CHDP

Fig. 2 enlarged details of the locking elements
according to Fig. 1 and

Fig. 3 is a section along the line A-A of Fig. 1.

The sprinkler according to the invention essentially consists, as shown in Fig. 1, of a flange-shaped base body 1, onto which a nozzle 3 provided with an external thread 2 is formed. The nozzle 3 serves for connection to a supply line (not shown) carrying fire extinguishing water under low pressure.

Close to the outer edge of the base body 1, two holes 4 with internal threads 5 are made diametrically opposite one another. Instead of the screw connection, a plug connection can also be provided. Supports 6 are screwed into the holes 4 of the base body 1 at one end, which protrude from the base body 1 in a direction opposite the nozzle 3. The two support supports 6 have a deflector 7 at the other end for distributing the extinguishing water. A cylindrical receiving space 8 is formed centrally in the base body 1, which is connected to the nozzle 3 by a through opening 9 in the axial alignment of the nozzle 3. The receiving space 8 is delimited by a shoulder-like base surface 10 and a lateral boundary surface 11.

The nozzle 3 forms a conically tapering pipe section 12 on the inside, which is arranged in front of the passage opening 9. This pipe section 12 has a groove 13 on the inside at its end facing the supply line for receiving a dirt filter 14.

On the horizontal floor surface 10 of the receiving space 8 associated with the passage opening 9 there is a perforated disk-shaped seal 15, on which a perforated disk 16 with a sleeve-shaped neck 17 is supported,

HG/201071-UMBRA CHDP

which projects centrally into the passage opening 9.

A recess 18 is machined into the side of the perforated disk 16 opposite the neck 17, into which a sealing disk 19 is inserted. An annular holding body 20 rests with its collar 21 close to the recess 18 on the perforated disk 16. The holding body 20 is dimensioned with its outer diameter such that its outer circumferential surface 22 rests against the lateral boundary surface 11 of the cylindrical receiving space 8. Its height is dimensioned such that it protrudes slightly from the receiving space 8. A circumferential groove 23 is machined into the lateral boundary surface 11 of the receiving space 8, which groove is inserted into the outer circumferential surface 22 of the holding body 20.

24. A locking element 25, for example a main ring spring, is inserted into the grooves 23 and 24. A release element 26, which is fastened perpendicular to the holding direction H-H of the bow-like springs 27 on the base body 1 (see Fig. 2), holds the main ring spring 25 in the grooves 23 and 24 in such a position that the holding body 20 is held securely by the spring tension on the lateral boundary surface 11 against the applied water pressure. In addition, the holding body 20 is secured with the bow-like bent spring 27, which on the one hand engages in a further groove 28 worked into the peripheral surface 22 of the holding body 20 and on the other hand partially encloses the holding supports 6.

Perforated disc 16, sealing disc 15, holding body 20, locking element

25 and release element 26 form the outer locking member 29 of the second stage II of the locking mechanism, which is released when the release element 26 relaxes the main ring spring 25 due to an inadmissible heat development. The main ring spring 25 moves into the groove 24, releases the

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8th

HG/201071-UMBRA CHDP

Holding body 20 and the prevailing water pressure ejects the outer locking member 29 together with the inner locking member 30, which is described in more detail below (see Fig. 1 and 2).

A closure piece 31 rests sealingly on the seal 19 of the perforated disk 16 inserted in the recess 18. The closure piece 31 has a collar 32 which projects into the sleeve-shaped neck 17 of the perforated disk 16 and is provided with a cut collar surface 33 against which the extinguishing agent pressure is applied. On the side opposite the collar 32, the closure piece 31 has a recess 34 into which a sealing disk 35 is inserted. An inner dome-like holding body 36 is inserted in the outer holding body 20. The outer holding body 20 and the inner holding body 36 have grooves 37 and 38 at the same height, which are machined into their opposite surfaces. The grooves 37 and 38 accommodate an inner locking element 39, for example an annular spring, which is held under tension by a further release element 40 so that the dome-like holding body 36 is fixed to the outer holding body 20 against the existing water pressure. The dome-like holding body 36 is provided with a central bore 41 with an internal thread 42, into which an adjusting screw 43 is screwed, which presses against the closure piece 31 via a disc spring 45 and a disc spring plate 47 and creates a seal against the existing water pressure.

The inner grooves 37 and 38, into which the inner locking element 39 engages, are located above the outer grooves 23 and 24, thereby ensuring a secure hold of the inner locking member 30 in the outer locking member 29.

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HG/201071-UMBRA CHDP

Another bow-shaped spring 44, which is clamped by the adjusting screw 43 on the dome-shaped holding body 36, partially surrounds the holding supports 6.

Closure piece 31, sealing disk 35, dome-like holding body 36, adjusting screw 43 and trigger element 40 form the inner locking member 30. The inner locking member 30 is released when, for example, a smoke detector (not shown) detects an incipient fire in stage I due to the presence of smoke and activates the trigger element 40 with a signal. The ring spring 39 is released and relaxes, causing the ring spring 39 to move into the groove 38. As a result, the dome-like holding body 36 is released together with the closure piece 31 and ejected by the water pressure. The spring 44 prevents the inner locking member 30 from being thrown against the deflector 7 when it is ejected.

When the inner blocking member 30 is ejected, the perforated disk 16 remains in its position and thereby reduces the cross-section of the passage opening 9, so that the escaping extinguishing agent experiences an increase in speed and a fine atomization of the extinguishing medium is achieved. This effect can be further improved by providing the sleeve-shaped neck 17 with a star-shaped opening.

In the event that the locking member 29 is subsequently released by the trigger element 26, the cross-section of the passage opening 9 expands. The speed of the extinguishing agent jet is reduced, so that the droplet size of the spray jet increases noticeably.

t. .

HG/201071-UMBRA

CHDP

List of reference symbols used

Base body 1

External thread 2

Nozzle 3

Holes 4

Internal thread 5

Supports 6

Deflector 7

cylindrical receiving space 8

Passage opening 9

Floor area of 8 10

lateral boundary area of 8 11

Pipe section 12

inner groove in 12 13

Dirt filter 14

Seal 15

Hole disc 16

Neck 17

Recess in 16 18

Sealing disc 19

outer holding body 20

Bund 21

outer peripheral area of 20 22

Groove in 11 23

Groove in 22 24

outer locking element/main ring spring 25

Trigger element 26

Spring 27

Groove in 22 28

outer locking member 29

HG/201071-UMBRA

CHDP

inner locking element locking piece; collar on 31 bevelled collar surface recess in sealing disc inner retaining body grooves

inner locking element/ring spring release element centric bore internal thread adjusting screw spring

Disc spring Te Her spring plate holding direction locking steps

31

33

35 36 37, 39 40 41

43 44 45 46 H-H I, II

3 sheets of drawings

Claims (13)

1. Sprinkler with ejection device for the separate discharge of a fine-droplet or coarse-droplet fluid jet from a fluid line kept under low pressure into rooms, for example living rooms for fighting fires, with a flange-like base body on which a nozzle is provided for connection to the fluid line, holding supports which are attached to the base body so as to protrude therefrom and which carry a deflector with a series of openings for distributing the fluid into the room, and a conically tapering chamber with a passage opening to the base body for the fluid to escape, a closure body blocking the opening against the fluid to escape, characterized in that the closure body is formed from at least a two-stage locking mechanism ( 15 , 16 , 20 , 25 ; 31 , 35 , 36 , 39 ), the individual stages (I; II) of which have monitoring sensors for monitoring the rooms and trigger elements ( 26 ; 40 ) for separate or joint ejection of the locking mechanism of the individual stages. 2. Sprinkler according to claim 1, characterized in that the locking mechanism is formed from inner and outer locking members ( 30 ; 29 ), the outer locking member ( 29 ) of which is detachably held in a cylindrical receiving space ( 8 ) of the base body by a locking element ( 25 ) and the inner locking member ( 30 ) of which is detachably held on the outer locking member ( 29 ) by a locking element ( 39 ). 3. Sprinkler according to claim 1 and 2, characterized in that the outer blocking member ( 29 ) consists of a perforated disk ( 16 ) which has a sleeve-shaped neck ( 17 ) inserted in the passage opening ( 9 ) and a recess ( 18 ) opposite the neck, a sealing disk ( 19 ) inserted between the perforated disk ( 16 ) and the support surface of the receiving space ( 8 ), and an annular holding body ( 20 ) with a collar (21) placed on the perforated disk ( 16 ) near its recess ( 18 ), wherein the holding body ( 20 ) has in its outer circumferential surface ( 22 ) located towards the side surface ( 11 ) of the receiving space ( 8 ) a circumferential groove ( 24 ) for receiving the blocking element ( 25 ) , which groove fits into an adequate in the side surface of the receiving space ( 8 ) engages in a fixing groove ( 23 ). 4. Sprinkler according to claims 1 to 3, characterized in that the inner locking member ( 30 ) consists of a seal ( 19 ) inserted into the recess ( 18 ) of the perforated disk ( 16 ), a closure piece ( 31 ) placed on the seal ( 19 ) with a cut collar ( 32 ) projecting into the neck ( 17 ) of the perforated disk ( 16 ), a dome-like holding body ( 36 ) insertable into the holding body ( 20 ) of the outer locking member ( 29 ), which is held by the locking element (39) inserted in a groove ( 37 ) machined in the closure piece ( 31 ) and an adequately formed groove ( 38 ) in the outer holding body ( 20 ), a disc spring ( 45 ) arranged between the closure piece ( 31 ) and the inner holding body ( 36 ). ) and an adjusting screw ( 43 ) guided through the inner holding body ( 36 ) in a central bore ( 41 ) with an internal thread ( 42 ), which presses perpendicularly on the disc spring ( 45 ) to adjust the tightness. 5. Sprinkler according to claim 3, characterized in that the sleeve-shaped neck ( 17 ) has a cross-shaped or star-shaped opening on the inside. 6. Sprinkler according to claims 1 to 5, characterized in that the locking elements ( 25 ; 39 ) are bow-like springs which are in operative connection with the triggering elements ( 26 ; 40 ). 7. Sprinkler according to claim 6, characterized in that the trigger element ( 26 ) for the outer blocking element ( 25 ) is a bimetal, glass bulb or fusible element. 8. Sprinkler according to claim 6, characterized in that the triggering element ( 40 ) for the inner blocking element ( 39 ) is a pyrotechnic actuator or an electromagnetic component. 9. Sprinkler according to claim 1, characterized in that the outer grooves ( 23 ; 24 ) in the outer holding body ( 20 ) and in the side surface ( 11 ) of the receiving space ( 8 ) on the one hand and the inner grooves ( 37 ; 38 ) of the outer holding body ( 8 ) and the inner holding body ( 36 ) on the other hand are arranged offset from one another such that the grooves ( 37 ; 38 ) assigned to the inner holding body ( 36 ) lie above the grooves ( 23 ; 24 ) assigned to the outer holding body ( 20 ). 10. Sprinkler according to claim 1, characterized in that the sensors are ionization smoke detectors, optical smoke detectors, maximum heat detectors, differential heat detectors and flame detectors. 11. Sprinkler according to claims 1 to 10, characterized in that a bow-like spring ( 44 ) for holding the released inner locking member ( 30 ) is arranged between the deflector ( 7 ) and the adjusting screw ( 43 ), wherein the spring ( 44 ) partially encloses the holding supports ( 6 ) with their ends. 12. Sprinkler according to claims 1 to 10, characterized in that a further spring ( 27 ) held in a groove ( 28 ) of the outer holding body ( 20 ), which partially encloses the holding supports with its ends, holds the outer holding body ( 20 ) away from the deflector ( 7 ) during ejection. 13. Sprinkler according to claim 1, characterized in that a dirt strainer ( 14 ) is arranged in the nozzle ( 3 ).