WO2001064287A2

WO2001064287A2 - Sprinkler with ejection device

Info

Publication number: WO2001064287A2
Application number: PCT/DE2001/000810
Authority: WO
Inventors: Torsten Clauss; Andreas Schmidt; Wassili Jansen
Original assignee: Umbra Ingenieurgesellschaft Für Feuerlöschsysteme Mbh
Priority date: 2000-02-29
Filing date: 2001-02-27
Publication date: 2001-09-07
Also published as: WO2001064287A3; DE10010876B4; DE10010876A1; AU5610401A

Abstract

The invention relates to a sprinkler with an ejection device for separately emitting a jet of liquid in the form of thin or large drops from a low-pressure liquid line. The aim of the invention is to provide a sprinkler of the above-mentioned variety, capable of successively producing a spray mist consisting of fine droplets and spray jets consisting of large drops according to the nature of the fire that breaks out and the course that said fire takes, while at the same time maintaining approximately the same operating pressure with respect to the fire extinguishing agent and minimizing water consumption, reducing the amount of damage caused by water in the event of a blaze and increasing the cost effectiveness of the fire-fighting system. To achieve this, the sealing body comprises at least one two-step locking mechanism, wherein the individual steps thereof are associated with monitoring sensors for monitoring the areas in question and trigger elements, resulting in separate and common ejection of the locking mechanism during said individual steps.

Description

Sprinkler with ejection device

The invention relates to a sprinkler with an ejection device for the separate application of a fine or coarse-headed fluid jet from a fluid line kept under low pressure, in rooms, for example living rooms for fighting fire, with a flange-like base body, on which a connection piece is provided for connection to the fluid line, holding piece , which are attached to the body in a towering manner 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 body for the exit of the fluid, with a closure body opening against the Blocked fluid outlet.

Sprinklers with an ejection device for dispensing extinguishing liquid in stationary fire extinguishing systems are well known. From DE-A 27 03 459 is 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 on the edge of the baffle plate and an arrangement of which, in the ready state of the nozzle nozzle Nozzle mouth blocks and which consists of a sealing element seated sealingly on the nozzle mouth and a release element exerting a closing force on the latter, the response of which eliminates the closing force on the closing element and this releases the nozzle mouth for the exit of the water jet. The closure element is provided with an ejection device which, together with the propulsive force of the extinguishing water jet, leads away after the closing force ceases, the ejection device being releasably supported on the parts of the nozzle which are firmly connected to one another in the ready position of the sprinkler nozzle

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 formed on the housing and carrying a distributor cap, a cover cap closing the flow channel and one between the two Caps arranged assembly that has a lever, a support strut with two laterally perforated tabs and a temperature monitor inserted between the tabs. A protruding anti-clamping ball is provided on the support strut, the slow-curved main section m of which runs approximately parallel to the strut and which, when the sprinkler responds, strikes the frame and the distributor cap. These as well as other known solutions (EP-A 0 505 672, US 3 834 463 or US-A 5 505 383) are quite 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 discharge opening depends on the clamps is fixed and on the other hand the chemical pressure in the feed line is constant. A variable application of the extinguishing agent, for example in the form of a fine-droplet spray mist during the development phase and a coarse-droplet spray jet with an open flame, is not achievable with the known sprinklers. In the event of a fire, this regularly leads to high water consumption due to the stationary extinguishing system with all the associated disadvantages of oversizing the pumps, pipes and containers for extinguishing agents in the system. Another not inconsiderable disadvantage of this prior art is that the damage caused by the water applied can lead to the object to be protected being completely unusable.

The spray nozzle disclosed in DE-A 36 24 939 generates a spray jet which contains small and large drops, namely small drops in a relatively small edge area and large drops in the predominant central area. This is achieved in that the opening or openings is / are preceded by one or more opening openings whose overall clear cross-section is a predetermined amount smaller than the clear total cross-section of the opening or openings. With this known teaching, it is possible in one However, it is not feasible to produce small and large drops of spray at the same time, but it is not possible to apply spray mists and spray jets at different times, which is necessary for dynamic adaptation to the course of the fire. All of the aforementioned disadvantages also apply to this known sprinkler nozzle.

In this prior art, the invention has for its object to provide a sprinkler of the type mentioned, with which it is possible, with approximately the same operating pressure of the extinguishing agent, one after the other depending on the occurrence and course of fire, small droplet spray mist and coarse droplet spray jet while minimizing the Water consumption, the reduction of water damage in the event of fire and the increase in 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 state of the art, which starts from a one-piece closure member of constant size and size, and tries to influence the spray pattern of the spray jet by adding components such as ventuπdusen, throttle, nipple, the closure member is in the invention in several parts, so to speak as a closure in the lock, executed. Depending on the prevailing conditions of a fire, this initially allows an inner part of the closure body to be released after a signal from a smoke detector or gas detector and to eject a spray-like droplet jet 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 which releases the outer part of the closure body. This increases the diameter of the opening and a coarse droplet of spray can escape. In the event of an immediate flame fire, the locking mechanism according to the invention is ejected in its entirety without the individual locking members becoming detached from one another.

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

Further advantages and details emerge from the following description with reference to the attached drawings.

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

It shows:

Fig. 1 shows a side view of the sprinkler according to the invention, Fig. 2 enlarged details of the locking members of FIG. 1 and

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

The sprinkler according to the invention essentially consists, as shown in FIG. 1, of a flange-shaped basic body 1 on which a nozzle 3 provided with an external thread 2 is molded. The nozzle 3 is used for connection to a supply line, not shown, which leads to extinguishing water at low pressure.

Near the outer edge of the base body 1, two bores 4 with an internal thread 5 are made diametrically opposite in them. Instead of the screw connection, a plug connection can also be provided. In the bores 4 of the base body 1 retaining stub 6 are screwed at one end, which protrude from the base body 1 against the neck 3 aligned. At the other end, the two holding sockets 6 carry a deflector 7 for distributing the quenching water. A cylindrical receiving space 8 is formed centrally in the basic body 1 and communicates with the connection piece 3 through a passage opening 9 in axial alignment of the connection piece 3. The receiving space 8 is delimited by a shoulder-like floor surface 10 and a lateral boundary surface 11.

The connector 3 forms a conically tapering pipe piece 12 on the inside, which is arranged upstream of the passage opening 9. At its end facing the supply line, this line piece 12 has a groove 13 on the inside for receiving a dirt screen 14.

On the horizontal bottom surface 10 of the receiving space 8 assigned to 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. which protrudes through the opening 9 centering. In the side of the perforated disk 16 opposite the neck 17, a cutout 18 is incorporated, and a sealing washer 19 is inserted. An annular holding body 20 rests on the perforated disk 16 with its collar 21 near the recess 18. The holding body 20 is dimensioned with its outer diameter such that its outer circumferential surface 22 bears against the lateral boundary surface 11 of the cylindrical receiving space 8. The height is dimensioned such that it protrudes slightly from the receiving space 8. In the lateral boundary surface 11 of the receiving space 8, a circumferential groove 23 is incorporated, which is opposite a groove 24 made in the outer peripheral surface 22 of the holding body 20. 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 perpendicularly to the holding direction HH of the ball-like springs 27 on the basic 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 by the spring tension on the lateral boundary surface 11 is held securely against the water pressure. In addition, the holding body 20 is secured with the spherically curved spring 27, which on the one hand engages in a further groove 28 machined into the peripheral surface 22 of the holding body 20 and on the other hand partially encloses the holding connection piece 6. Perforated disk 16, sealing washer 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 inadmissible heat development. The main ring spring 25 moves into the groove 24, triggers the Holding body 20 and the pending water pressure ejects the outer locking member 29 together with the inner locking member 30, which will be described in more detail below (see FIGS. 1 and 2).

A closure piece 31 lies sealingly on the seal 19 of the perforated disk 16 inserted into 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 which is provided with a cut flange surface 33 against which the releasing agent pressure is applied. On its side opposite the collar 32, the closure piece 31 has a recess 34 into which a sealing washer 35 is inserted. An inner dome-like holding body 36 is suitably inserted into the outer holding body 20. Outer holding body 20 and inner holding body 36 have the same height grooves 37 and 38, which are incorporated in their opposite faces. The grooves 37 and 38 receive an inner locking element 39, for example an annular spring, which is held under tension by a further release element 40 in such a way that the dome-like holding body 36 is fixed on the outer holding body 20 against the water pressure present. 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 plate spring 45 and a plate spring plate 47 and creates the tightness against the water pressure present. The inner grooves 37 and 38, in which the inner locking element 39 engages, lie above the outer grooves 23 and 24, which ensures a secure hold of the inner locking member 30 in the outer locking member 29. Another bow-like spring 44, which is held in a clamped manner by the adjusting screw 43 on the dome-like holding body 36, partially engages around the holding supports 6. Closure piece 31, sealing disk 35, dome-like holding body 36, adjusting screw 43 and release element 40 form the inner locking member 30. The inner blocking 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 the triggering element 40 is activated by a signal. The ring spring 39 is released and relaxes, whereby the ring spring 39 moves 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. With the ejection of the inner locking member 30, the perforated disc 16 remains in position and thereby reduces the cross section of the passage opening 9, so that the emerging extinguishing agent experiences a speed increase and a fine atomization of the extinguishing medium is achieved. This effect can be further improved in that the sleeve-shaped neck 17 is provided with a star-shaped opening.

In the event that the blocking member 29 is then released by the release element 26, the cross section of the passage opening 9 widens. The velocity of the extinguishing agent jet is reduced so that the droplet size of the spray jet increases markedly. List of the reference symbols used

Basic body 1

External thread 2

Nozzle 3

Bores 4 internal thread 5

Holding nozzle 6

Deflector 7 cylindrical receiving space 8

Passage opening 9 floor area of 8 10 lateral boundary area of 8 11

Pipe piece 12 inner groove in 12 13

Dirt strainer 14 seal 15

Perforated disc 16

Neck 17

Recess in 16 18

Sealing disk 19 outer holding body 20

Collar 21 outer circumferential surface of 20 22

Groove in 22 24 outer locking element / main spring 25

Release element 26

Spring 27

Groove 22 28 outer locking member 29 inner locking member 30

Closure piece 31 collar on 31 32 bevelled collar surface 33

Recess in 31 34

Sealing disc 35 inner retaining body 36 grooves 37 _. 38 inner locking element / spring 39

Aus1oseelernent 40 central bore 41

Internal thread 42 adjusting screw 43

Spring 44

Belleville washer 45

Disc spring plate 46

Holding direction H-H blocking levels I, II

With 3 sheets of drawings

Claims

claims

1. Sprinkler with ejection device for the separate application of a fine or coarse pot

Fluid jets from a fluid line held under low pressure, in rooms, for example living rooms for fighting fire, with a flange-like base body, on which a connection piece for connection to the fluid line is provided, holding connections, which are attached to the base body in a projecting manner and which also have a deflector bear a series of openings for distributing the fluid into the space, and a conically tapering space with a passage opening to the base body for the exit of the fluid, a closure body blocking the opening against the escape of the fluid, characterized in that the closure body consists of at least two stages Locking mechanism (15, 16.20, 25, -31, 35, 36, 39) is formed, the individual stages (I; II) monitoring sensors for monitoring the rooms and release elements (26; 40) for separate or joint ejection of the locking mechanism are assigned to individual levels.

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) by a locking element (25) detachably in a cylindrical receiving space (8) of the base body and its interior Locking element (30) is held detachably on the outer locking element (29) by a locking element (39).

3. Sprinkler according to claim 1 and 2, characterized in that the outer locking member (29) from a perforated disc (16) having a sleeve-shaped, in the passage opening (9) lying neck (17) and a recess opposite the neck (18) , one between the perforated disc (16) and the support surface of the receiving space (8) inserted sealing washer (19), and an annular retaining body (20) with a collar (21) placed on the perforated disc (16) near its recess (18), the Retaining body (20) in its outer circumferential surface (22) located on the side surface (11) of the receiving space (8) hm has a circumferential groove (24) for receiving the locking element (25), which introduced an adequate in the side surface of the receiving space (8) Engages groove (23) fixing.

4. Sprinkler according to claim 1 to 3, characterized in that the inner locking member (30) from a in the recess (18) of the perforated disc (16) inserted seal (19), with a seal (19) placed on the closure piece (31) a cut collar (32) protruding into the neck (17) of the perforated disc (16), a dome-like holding body (36) which can be inserted into the holding body (20) of the outer locking member (29) and which is incorporated into a locking piece (31) Groove (37) and a locking element (39) which is adequately formed in the outer holding body (20), a locking element (39) between the closing piece (31) and the inner holding body (36) and one through the inner one Holding body (36) is formed in a central bore (41) with an internal thread (42) guided adjusting screw (43) which presses vertically on the plate spring (45) to adjust the tightness.

5. Sprinkler according to claim 3, so that the sleeve-shaped neck (17) has a cross-shaped or star-shaped opening on the inside on the inside.

6. Sprinkler according to claim 1 to 5, so that the locking elements (25; 39) are ball-like springs which are in operative connection with the release elements (26; 40).

7. Sprinkler according to claim 6, that the release element (26) for the outer blocking element (25) is a bimetal, glass barrel or melting element.

8. Sprinkler according to claim 6, d a d u r c h g e k e n n z e i c h n e t that the release element (40) for the inner locking 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 to 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, d a d u r c h g e k e n n z e i c h n e t that the sensors ionization smoke detectors, optical smoke detectors

Are maximum heat detectors, heat differential detectors and flame detectors.

11. Sprinkler according to claim 1 to 10, characterized in that between the deflector (7) and the adjusting screw (43) a ball-like spring (44) for holding the released inner locking member (30) are arranged, the spring (44) holding the supports ( 6) partially encloses with their ends.

12. Sprinkler according to claim 1 to 10, characterized in that a in a groove (28) of the outer holding body (20) held further spring (27), which partially encloses with its ends the holding piece, the outer holding body (20) when ejected from Deflector (7) holds.