EP2915565A1 - Trigger unit for a firefighting installation - Google Patents

Abstract

To a trip unit for a fire extinguishing system with at least one extinguishing agent container to which at least one extinguishing agent line is connected, and wherein at least one extinguishing agent nozzle is provided which is connected to the extinguishing medium line, wherein upon activation of the extinguishing agent container, an extinguishing agent is releasable and by the extinguishing agent line to the Löschmitteldüse is feasible, wherein the activation of the extinguishing agent container is triggered by a pressure increase in the extinguishing medium line, wherein the trigger unit comprises an opening element which triggers the pressure increase in the extinguishing agent line, so to improve a trip unit such that it also for high and aggressive air pollution polluted workstations, it is proposed that a temperature-dependent activation element is integrated together with a pressure accumulator in the extinguishing agent line, the Aktivierungselemen t is executed to activate the pressure accumulator.

Description

Technical area

The invention relates to a tripping unit for an extinguishing system with at least one extinguishing agent container to which at least one extinguishing medium line is connected, and wherein at least one extinguishing agent nozzle is provided which is connected to the extinguishing medium line, wherein upon activation of the extinguishing agent container, an extinguishing agent is releasable and by the extinguishing medium line can be guided to the extinguishing agent, wherein the activation of the extinguishing agent container can be triggered by a pressure increase in the extinguishing medium line, wherein the triggering unit comprises an opening element which triggers the pressure increase in the extinguishing medium line.

The trip unit is used for extinguishing systems with the goal to protect people and goods in case of fire.

State of the art

From the DE 10 2011 052 330 A1 an extinguishing system of the type mentioned is known. This includes several tripping units, which are designed as a temperature-sensitive opening element or as a pneumatically acting fire alarm.

DESCRIPTION OF THE INVENTION: Problem, Solution, Advantages

The invention has for its object to further develop a trip unit so that it is also suitable for high and aggressive air pollution polluted jobs.

This object is achieved by a trip unit with the characterizing features of claim 1 in conjunction with its preamble features.

The invention provides a dirt-resistant solution.

The invention is based on the idea not to connect the trip unit by a T-piece with the extinguishing agent line, but to integrate them quasi in the extinguishing agent line. The trip unit can be designed as a tubular body and aligned axially to the extinguishing medium line. A suitable outer skin of the tubular body provides a dirt and korrosionsunanfälliges element.

The tripping elements or tripping units according to the invention are integrated as a complete device directly into the line and flowed through by the extinguishing agent.

Inside the line, a pressure accumulator may be arranged, which with a Puncture device can be in operative connection. The accumulator can be held spring loaded on one side and held and guided on the other side with its neck-like end in an annular body. This annular body may be made of eutectic solder or may be attached thereto. The special feature of the solder is that it is relatively strong and liquid at a defined temperature, eg 90 ° C or 70 ° to 75 ° C and releases the spring-loaded pressure accumulator with respect to a movement along its longitudinal axis, so that through the Einstecheinrichtung the built-in line pressure accumulator is opened and a pressure wave in the system triggers. In this way can then be opened via a corresponding activation arrangement of the extinguishing agent container, which introduces the extinguishing agent in the extinguishing agent line, where it is then guided via extinguishing agent nozzles to the fire or the fire.

It is preferably a pneumatic trip. The annular body which can hold the pressure accumulator and e.g. either consists of eutectic solder or is attached by means of eutectic solder on the copper body may have corresponding flow openings, so that it can be flowed through by the extinguishing agent, so that the extinguishing agent flows around the pressure accumulator.

The activation element may also be defined as an indirect opening element and be an annular body which is designed for activating or releasing the pressure accumulator or for opening with the aid of the puncturing element. The actual opening function is controlled by another element, e.g. reached a needle.

Advantageous developments of the invention are characterized in the subclaims.

In a preferred embodiment of the unit according to the invention it is provided that the activation element is firmly connected in a normal state with an inner wall of a pipe section. A normal state is always when there is no fire. The activation element is then designed such that in case of fire above a defined temperature of the pipe section, the activation element of the inner wall of the pipe section is releasable and is under spring action, that it releases the pressure accumulator. The triggering temperature may refer to the surface of the corresponding line piece and is preferably about 70 ° to about 90 °. By this fastening a relatively simple construction is possible and ensures a reliable operation.

It is particularly advantageous if the activating element is of annular design and connected to a neck of a pressure vessel located axially in a pipe section and serving as an accumulator, preferably indirectly. The activation element then has a double function. On the one hand there is a movement of the pressure vessel free and on the other hand it leads this within the pipe section. The activation element is then also a guide element, so that components and costs are saved. The pressure vessel is located with its neck opposite the container bottom to a compression spring. After a release of the activation element from the pipe inner wall of the pipe section, the compression spring presses the pressure vessel and displaces it along its longitudinal axis in such a way that the neck or an upper side of the neck is moved in the direction of a spike-type piercing element or pressed against the piercing element. Thus, a medium under pressure in the pressure accumulator medium escape through the puncturing element in the extinguishing agent line. This will activate activation of the extinguishant container, e.g. is arranged at the end of the extinguishing agent line, thereby achieved by the pressure change effected in the extinguishing medium line. The extinguishing agent can then flow out of the extinguishing agent nozzles and extinguish the fire.

In a further advantageous development of the invention, the activation element consists of one, in particular eutectic, solder. That the entire body can be made of this material. The activation element may also comprise a solder. It can e.g. consist mainly of copper and be executed with a soldered surface, said surface is also soldered to a pipe inner wall. The activation element can therefore be fastened or soldered to the solder on the line piece. Namely, the solder becomes liquid above the defined temperature, so that the activating element can come loose from the inner wall of the pipe section and release or open the pressure accumulator.

It is very advantageous if the annular activation element comprises an outer groove in which the solder is embedded. During assembly, e.g. First solder material is heated, liquefied and filled in the groove. The annular body can then be mounted with the cooled solid, solder in the pipe section. Subsequently, the surface of the pipe section can be heated, so that the solder melts again and enters into a cohesive solid connection with the inner surface of the pipe section during cooling.

Another advantageous embodiment of the trip unit according to the invention is characterized in that three connecting elements used become. Each is in particular disc-shaped and is provided with at least one, but preferably several, for example, four flow openings. All fasteners are in cross section to the pipe section. In addition, each connecting element is provided with a central mounting opening. The first connecting element carries a pressure spring lying in the longitudinal direction of the line piece. This is preferably held by an axial, bolt-shaped spring holder. The spring is practically wrapped around the pen and partially protrudes from this. The spring holder is attached to the first connecting element and points in the direction of the pressure vessel. The second connection element is arranged between the annular activation element and the neck of the pressure vessel. This element connects the neck with the activation element or the annular body. The third connecting element carries the piercing element, which is directed to the neck of the pressure vessel. All three connecting elements can thus be made identical, so that only one production tool is required. The component fulfills all three fastening functions, ie attachment of the spring, attachment of the pressure vessel neck and attachment of the piercing element. As a result, storage costs can be saved.

So that the pipe section with integrated pressure vessel and temperature-dependent activation element can be easily connected to sections of the extinguishing medium pipe, it is provided that the pipe section is provided at both ends with, in particular identical, connecting pieces for linear connection of the pipe section to the extinguishing medium line, or portions thereof , Each connector has at least one flow opening or outlet opening and comprises a first plug-in area for insertion and / or screwing into the pipe section. Each connector also has an intermediate portion, each connector also having a second mating portion for insertion and / or screwing into the extinguishant conduit.

Conveniently, the pipe piece is made of copper, so that on the one hand, a soldering of the ring body is possible and on the other hand, the requirement of a corrosion-resistant solution is taken into account.

In a further preferred embodiment of the invention, the pipe section has a larger diameter than the diameter of the extinguishing medium line. The thus created enlarged installation space for pressure vessels, functional and mounting parts improves the unit according to the invention or its function.

Short description, the drawings

• Fig. 1 eine schematische Darstellung einer Löschanlage mit mehreren Auslöseeinheiten,
• Fig. 2 eine Schnittdarstellung einer erfindungsgemäßen Auslöseeinheit der Löschanlage im Normal- bzw. Nichtausgelöst-Zustand,
• Fig. 3 eine Schnittdarstellung der erfindungsgemäßen Auslöseeinheit der Löschanlage im Ausgelöst-Zustand,
• Fig. 4 eine Explosionsdarstellung der erfindungsgemäßen Auslöseeinheit,
• Fig. 5 eine vergrößerte Darstellung eines ersten Endabschnitts der Auslöseeinheit in Fig. 2, und
• Fig. 6 eine vergrößerte Darstellung eines zweiten Endabschnitts der Auslöseeinheit in Fig. 2.

An embodiment will be explained in more detail with reference to the drawings, wherein further advantageous developments of the invention and advantages thereof are described. Show it:

• Fig. 1 a schematic representation of an extinguishing system with multiple trip units,
• Fig. 2 a sectional view of a tripping unit according to the invention of the extinguishing system in the normal or non-triggered state,
• Fig. 3 a sectional view of the tripping unit according to the invention of the extinguishing system in the tripped state,
• Fig. 4 an exploded view of the trip unit according to the invention,
• Fig. 5 an enlarged view of a first end portion of the trip unit in Fig. 2 , and
• Fig. 6 an enlarged view of a second end portion of the trip unit in Fig. 2 ,

Preferred embodiments of the invention

In the figures, like parts are given the same reference numerals.

Fig. 1 shows an extinguishing system 1 with multiple trip units 100. The system 1 is provided with an extinguishing agent container 10 to which at least one extinguishing agent line 11 is connected. There are several extinguishing agent nozzles 12 are provided, which are connected to the extinguishing agent line 11. Upon activation of the extinguishing agent container 10, an extinguishing agent 13 is released and is passed through the extinguishing agent line 11 to the extinguishing agent nozzles 12, wherein the activation of the extinguishing agent container 10 is triggered by a pressure increase in the extinguishing agent line 11. The tripping units 100 each include a temperature-dependent opening element or an opening arrangement 14, which can trigger the pressure increase in the extinguishing medium line 11. The extinguishing agent line 11 is depressurized and / or emptied in the non-activated state.

At the extinguishing medium line 11 a plurality of tripping units 100 are arranged, through which the pressure increase in the extinguishing medium line 11 is generated.

The pressure in the event of triggering of the trip units 100 or in case of fire rises to an activation pressure for activating the extinguishing agent container 10, wherein the extinguishing agent nozzle 12 requires an opening pressure to open, which is higher than the activation pressure, wherein the activation pressure has a value of 2 bar up to 4 bar. The static pressure is less than the opening pressure for opening the extinguishing agent nozzle 12.

Each extinguishing agent nozzle 12 has a spring-loaded closure and / or a rupture disk which opens the extinguishing agent nozzle 12 when the opening pressure in the extinguishing medium line 11 is reached.

The extinguishing agent container 10 has an elastic expansion body 16 which can be stretched with a blowing agent 17 so that the extinguishing agent 13 is released into the extinguishing agent line 11 via a change in shape of the expansion body 16, a propellant cartridge 18 preferably being received in the extinguishing agent container 10 for releasing the blowing agent 17 is, which is covered with the expansion body 16, and wherein the extinguishing agent 13 is received in the space between the expansion body 16 and the extinguishing agent container 10.

The extinguishing agent container 10 has a connection head 19 to which the extinguishing agent line 11 can be connected and which is arranged to close the extinguishing agent container 10, the connection head 19 having an activation arrangement 20 which activates the propellant cartridge 18 when the pressure in the extinguishing medium line 11 changes. The activation arrangement 20 comprises a triggering needle 21, which is movable against the propellant cartridge 18 by the pressure change such that it releases the propellant 17.

The Fig. 2 to 4 show a trip unit 100. In each unit 100, a temperature-dependent activation element 22 is integrated together with a pressure accumulator 23 in the extinguishing agent line 11. The activation element 22 is designed to activate the pressure accumulator 23.

The activation element 22 is firmly connected in a normal state or non-triggered state with an inner wall 24 of a pipe section or piece of pipe 25, as the Fig. 2 and 5 demonstrate. The activation element 22 is designed such that in case of fire above a defined temperature of the pipe section 25, the activation element 22 from the inner wall of the pipe section 25 is releasable. The element 22 is under spring action, so that it releases the pressure accumulator 23 after release from the inner wall 25.

The activation element 22 is annular and is connected to a neck 26 of an axially located in the pipe section 25, serving as the accumulator pressure vessel 23 only indirectly, as Fig. 5 shows. The pressure vessel 23 is a cartridge and is located as Fig. 2 shows, with its neck 26 opposite the container bottom 27 to a compression spring 28, after a release of the activation element 22 of the tube inner wall 24 of the line piece 25, the pressure vessel 23 along its longitudinal axis shifts. As Fig. 3 illustrated, the pressure vessel 23 presses when triggered with its neck 26 and its surface 15 (FIG. Fig. 5 As a result, a medium 30 present under pressure in the pressure accumulator escapes through the puncturing element 29 into the extinguishing agent line 11 (FIG. Fig. 1 ). This causes the activation of the extinguishing agent container 10, which in Fig. 1 is shown by the change in pressure or pressure increase in the extinguishing agent line eleventh

The activation element 22 comprises a eutectic solder 31, which in Fig. 5 you can see. The element 22 is fixed or soldered to the line piece 25 by the solder 31. The solder 31 is liquid in the event of fire above the defined temperature, so that the activation element 22 is released from the inner wall 24 of the line piece 25, in the direction of arrow A ( Fig. 5 ) and releases the accumulator 23. In this case, the medium 30 flows through a passage opening 40 of the needle element 53. The annular activation element 22 comprises, like the Fig. 4 and 5 show an outer groove 32 in which the solder 31 is embedded.

Furthermore, the show Fig. 2 to 4 a first disc-shaped connecting element 33 with four flow openings 34, which in Fig. 4 above, to the right. This carries the lying in the longitudinal direction of the pipe section 11 compression spring 28, such as Fig. 6 shows. This is held by means of an axial, bolt-shaped, attached to the first connecting element 33 spring holder 37.

Furthermore, a second, between the annular activation element 22 and the neck 26 of the pressure vessel 23 arranged and both connecting element 35 (FIG. Fig. 4 and 5 ), which is identical to the first connecting element 33 is executed.

A third connecting element 36 carries the piercing element 29 (FIG. Fig. 4 and 5 ). All connecting elements 33, 35, 36 are in cross section to the pipe section 11, wherein each connecting element 33, 35, 36 is provided with a central mounting opening 38, such as Fig. 4 illustrated.

The attachment opening 38 of the element 33 serves to hold the spring holder 37 and the spring 29, such as Fig. 6 shows. The attachment opening 38 of the element 35 serves to hold the neck 26, as Fig. 5 shows. The attachment opening 38 of the element 36 serves to hold the piercing element 29, as also in FIG Fig. 5 is shown.

The piercing element 29 has a needle tip 39 (FIG. Fig. 5 ) With the passage opening 40 and is connected to a hollow cylinder body 41 open at the end, which is inserted or connected in the element 36, for example screwed. The openings 38 are all provided with a thread, so that the neck 26 with the element 35 and the spring holder 37 with the element 33 can also be screwed.

Upon insertion of the needle tip 39 in the container 23, the pressurized medium 30 of the container 23 flows through the opening 40, through the hollow cylinder body 41. The medium 30 enters a chamber 42 (FIG. Fig. 3 and 5 ) and continues through the openings 34 of both elements 35, 36 into a gap 43 between the container 23 and line piece 25 in the region of the spring 28 (FIG. Fig. 6 ), then through the openings 33 of the element 33 100 via a second chamber 51 through a first outlet opening 44 of the unit. The medium 30 also flows through a second opposing outlet opening 45 (FIG. Fig. 3 and 5 ) in the opposite direction to all nozzles 12 (FIG. Fig. 1 ) to activate.

The pipe section 25 is in each case at both ends with identical connecting pieces 46, 47 (FIG. Fig. 4 ) for linear connection of the pipe section 25 to the extinguishing medium line 11. The connecting pieces 46, 47 have the throughflow openings or outlet openings 44, 45 (FIG. Fig. 3 ) on. As Fig. 4 1, each connecting piece 46, 47 has a first plug-in area 48 for insertion or screwing into the pipe section 25, wherein each connecting piece 46, 47 has an intermediate section 49. Furthermore, each connecting piece 46, 47 has a second plug-in area 50 for insertion or screwing into the extinguishing medium line 11, which has a smaller diameter for the thinner line 11, such as Fig. 6 shows. Namely, the pipe piece 25 has a larger diameter than the diameter of the extinguishing medium pipe 11. The pipe piece 25 is made of copper.

The opening arrangement 14 comprises the activating element 22, the solder 31, the connecting elements 35, 36 and the needle element 53. The connecting elements 33, 35, 36 are non-positively connected to the connecting pieces 46, 47 or the activating element 22.

LIST OF REFERENCE NUMBERS

100

trip unit

1

extinguishing system

10

Extinguishing agent container

11

Extinguisher line

12

Extinguishing nozzles

13

extinguishing Media

14

opening arrangement

15

neck finish

16

expansion body

17

propellant

18

Propellant cartridge

19

connection head

20

activation assembly

21

release pin

22

energizer

23

Pressure accumulator or container

24

inner wall

25

Pipe or pipe section

26

neck

27

container bottom

28

feather

29

piercing

30

medium

31

Lot 31

32

groove

33

first connecting element

34

Flow openings

35

second connecting element

36

third connecting element

37

penholder

38

fastening opening

39

pinpoint

40

Through opening

41

Hollow cylindrical body

42

first chamber

43

gap

44

Outlet opening 44

45

opposite outlet opening 45 throughflow opening 44, 45th

46

first connector 46, 47

47

second connector 46, 47

48

Plug-in area 48

49

Intermediate section 49

50

Plug-in area 50

51

Second Chamber

52

-

53

needle member

Claims (10)

Tripping unit (100) for an extinguishing system (1) with at least one extinguishing agent container (10) to which at least one extinguishing agent line (11) is connected, and wherein at least one extinguishing agent nozzle (12) is provided, which is connected to the extinguisher line (11), wherein upon activation of the extinguishing agent container (10) an extinguishing agent (13) is releasable and by the extinguishing medium line (11) to the extinguishing agent nozzle (12) feasible, wherein the activation of the extinguishing agent container (13) by a pressure increase in the extinguishing agent line (11) can be triggered is, wherein the trip unit (100) comprises an opening element (53) which causes the pressure increase in the extinguishing medium line (11), characterized in that a temperature-dependent activation element (22) together with a pressure accumulator (23) integrated in the extinguishing medium line (11) is, wherein the activation element (22) for activating the pressure accumulator (23) is executed. Tripping unit according to claim 1, characterized in that the activation element (22) in a normal state with an inner wall (24) of a line piece (25) is firmly connected, wherein the activation element (22) is designed such that in case of fire above a defined temperature of Line piece (25), the activation element (22) from the inner wall (24) of the line piece is releasable and is under spring action, that it releases the pressure accumulator (23). Tripping unit according to claim 2, characterized in that the activation element (22) is annular and connected to a neck (26) of an axially in a pipe section (25), serving as the pressure accumulator pressure vessel (23), preferably indirectly, wherein the Pressure vessel (23) with its neck (26) opposite the container bottom (27) on a compression spring (28) abuts, after a release of the activation element (22) of the pipe inner wall (24) of the line piece (25) the pressure vessel (23) along its longitudinal axis so displaced and with the neck (26) against a spritznadelelförmiges piercing element (29) expresses that under pressure in the pressure accumulator (23) existing medium (30) through the piercing element (29) in the extinguishing agent line (11) escapes to the Activation of the extinguishing agent container (10) by the pressure change caused thereby in the extinguishing agent line (11) to trigger. Tripping unit according to claim 2 or 3, characterized in that the activation element (22) consists of one, in particular eutectic, solder or comprises a solder (31) and is fastened with this to the line piece (25), wherein the solder (31) above the defined temperature is liquid, so that the activation element (22) from the inner wall (24) of the line piece (25) dissolves and the pressure accumulator (23) releases. Tripping unit according to claim 4, characterized in that the annular activation element (22) comprises an outer groove (32) in which the solder (31) is embedded. Trip unit according to one of Claims 3 to 5, characterized
that a first, in particular disc-shaped, and at least one flow opening (34) exhibiting connecting element (33) is present, which carries a longitudinal direction of the line piece (25) compression spring (28), wherein the compression spring (28) preferably by means of an axial, bolt-shaped held on the first connecting element (33) fixed spring holder (37),
that a second, between the annular activation element (22) and the neck (26) of the pressure vessel (23) arranged and both connecting, in particular disk-shaped, and at least one flow opening (34) exhibiting connecting element (35) is present, and
in that a third, in particular disc-shaped, connecting element (36) carrying at least one through-flow opening (34) is present, wherein each connecting element (33, 35, 36) is preferably provided with a central mounting opening (38). Tripping unit according to one of claims 3 to 6, characterized in that the pipe section piece (25) is provided at both ends with connecting pieces (46, 47) for linearly connecting the pipe piece (25) to the extinguishing medium pipe (11), each connecting piece (46 , 47) has at least one outlet opening (44, 45) and consists of a first plug-in area (48) for insertion or screwing into the pipe section (25), wherein each connecting piece (46, 47) has an intermediate portion (49), and wherein each connector (46, 47) to insert a second plug-in area (50) or screwed into the Extinguishing agent line (11). Trip unit according to claim any one of claims 3 to 7, characterized in that the pipe section (25) consists of copper. Tripping unit according to one of claims 3 to 8, characterized in that the pipe section (25) has a larger diameter than the diameter of the extinguishing medium line (11). Extinguishing system (1) with at least one triggering unit (100) according to one of the preceding claims.

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