EP0824940A2 - Fire damper - Google Patents

Abstract

The present invention relates to a fire protection device for a ventilation pipeline, in particular for the outlet connection of a ventilation device or a wall or ceiling shut-off device, the wall of a connection piece being lined with a fire protection compound (14) which foams at an elevated temperature. According to the invention, a closure device (18) is provided which is open when not in use and is arranged parallel to the axis of the connecting piece and via a triggering device (22) which is designed so that it triggers at a predetermined higher temperature, which is below the foaming temperature of the fire protection compound (14) lies during the triggering process, the closure device previously held in its open position is released and moves automatically by a pivoting movement into a closed position, in which it closes the cross section of the connecting piece. The closure device can be a closure flap (18), for example made of spring sheet metal, or else a part segment of the fire protection compound itself which is articulated in the socket and which tilts in the direction of the pipe axis of the socket when the triggering device is triggered.

Description

The present invention relates to a Fire protection device for a ventilation pipe, especially for the exhaust port of a ventilation unit or a wall or ceiling shut-off device being the wall a nozzle is lined with a fire protection compound, which foams at elevated temperature (Intumescent foam).

The fire protection device according to the invention thus serves either generally as a wall or ceiling barrier for ventilation pipe systems or to shut off the Exhaust nozzle of a ventilation device. This use case is particularly suitable for such ventilation devices that used in a branch line of a ventilation system be used, for example, for interior rooms in Apartment buildings, for example small kitchens, toilets, bathrooms Find use. The outlet port is on the Discharge side (pressure side) of the ventilation device. This Venting devices are usually relatively flat, so that they are in a comparatively thin wall of the ventilating room can be accommodated. Of the Air outlet is either parallel to the axis of the Fan or arranged at right angles to this.

Venting devices of the type mentioned are generally with a so-called check valve. This comes to Use when on the exhaust side of the venting device Negative pressure develops and should then close. It is also known for the blow-out of such Ventilation devices to provide fire protection devices. However, the problem with those from the prior art known fire protection compounds in the exhaust port can be introduced that these intumescent foams usually start at a higher temperature froth up and close the outlet port. After The fire protection regulations may require a Closure of the exhaust port in the event of a fire to reach a lower temperature between the Room temperature and the response temperature of the Intumescent foam.

If a fire breaks out in the building, other than the room equipped with the ventilation device and that Bleeding device is running, then the check valve is on the The exhaust side of the vent device is open and it is possible that the source of the fire or fumes through this open outlet pipe into the one to be vented Enter space and spread out further. The The vent valve's check valve would only open close if the venting device were switched off. If but this runs in the event of a fire is a moment of danger given.

The object of the present invention is a Fire protection device for a ventilation pipe, e.g. For the exhaust port of a ventilation device or a wall or To create a ceiling barrier of the type mentioned, that responds at a lower temperature, for example on the order of about 70 ° C and a Close the non-return valve even if it is running Fan causes.

A fire protection device provides the solution to this task for a ventilation pipe, especially for the Exhaust nozzle of the ventilation device or a wall or Ceiling shut-off device of the type mentioned with the characteristic features of the main claim.

The fire protection device according to the invention ensures use for the exhaust port of a ventilation device not just a response at a relatively low level Temperatures below the foaming temperature of the Fire protection compound itself but it also ensures that the exhaust port is closed in particular smoke-tight and thus the fire protection regulations are satisfied is done.

According to the invention, a closure device is provided which is open when not in use and parallel to the axis of the Nozzle is arranged and it is a trigger device provided that is designed so that it at a predetermined higher temperature triggers below the Foaming temperature of the fire protection compound is at this release process the previously in its open position held closure flap is released and through a pivoting movement automatically into a closed position moves in which it closes the cross section of the nozzle.

Said closure device can either be a Closing flap and can be used as a trigger device Use fusible link. According to an alternative variant of the Invention can also be the closure device sub-segment of the Be fire protection compound that when the Tripping device in the direction of the tube axis of the Ausblasstutens tilts and thereby the inner cross section of the Exhaust nozzle closes.

When using the fire protection device for the This can be done by blowing out a venting device Bleeding device also contain a non-return valve, which then during the closing movement of the closure device is taken and also in a closed position is moved, so that quasi a double closure of the Ausbaasstutzen by the locking device itself and is additionally given by the check valve.

In addition to the closure device, according to the invention as a rule, the lining of the socket wall Fire protection compound available, which at an even higher Foaming temperature and a complete fire safe Closure of the nozzle guaranteed.

In the solution according to the first variant of the invention a closure flap used as a closure device. For these flaps are not hinges or the like required that require maintenance.

Inside is in the exhaust port in the ordinary Open position of the flap a smoother aerodynamic conclusion given, so that none unnecessary flow resistance in the outlet of the Bleeding device result. The invention Fire protection device is designed so that it can be installed regardless of location, i.e. both in horizontal position of the nozzle, as well as in the vertical position, as well as vertically with the nozzle directed downwards.

Preferably one is used as the closure flap Spring plate flap, which is by means of a solder at one end is attached so that when heated to the predetermined Temperature there releases the connection. At the other end it can Spring plate flap be angled and over Fasteners to be attached to a bracket, the extends parallel on the back to the wall of the air outlet and is preferably embedded in the fire protection compound.

The socket or outlet socket when used for a Venting device can be rectangular or square Have inner cross section, each through the inner edge the fire protection mass is limited.

Furthermore, the nozzle preferably has a lower one Part with a larger outer diameter and an upper one narrower part with a smaller outside diameter, whereby in Transition area between the lower part and the upper Part of a paragraph is formed and both the lower one Part of the nozzle absorbs a fire protection compound as well upper narrow part of the nozzle a fire protection compound records.

Furthermore, the bracket on which the Closure flap (closure device) is attached with one in the open position of the flap to this parallel part provided in the fire protection compound is embedded. Another is preferably one Check valve arranged in the nozzle, which at the Swiveling movement of the closure flap into its closed position also pivots about its axis into the closed position.

According to a preferred variant of the invention, the Fire protection device for the ventilation pipe tubular housing with an upper narrower part, one middle further part and a lower narrower part, whereby each of the narrower parts mentioned to one Ventilation pipe can be connected and the device serves as a wall or ceiling shut-off device.

In an alternative variant of the invention Closure device an articulated in the outlet of the Venting device (or in the nozzle of the wall or Ceiling shut-off device) arranged sub-segment of the Fire protection compound, which in when the triggering device is triggered Direction on the pipe axis of the outlet nozzle tilts and this closes the inner cross-section of the outlet nozzle. This variant can e.g. so that the The majority of the fire protection compound is also solid in the mentioned elevated temperature (at which the Closure device still responds to the fire protection compound not foaming) and the articulated sub-segment can, for example, based on the scope of the Fire protection compound make up a quarter segment or less. The function of foaming the entire fire protection compound at an even higher temperature to It is, of course, a matter of course to close the exhaust connection flame-tight receive.

According to a preferred development of the invention the articulated sub-segment from an articulated upper segment and a partial remnant that is not pivots, but remains in its starting position. The triggering device can be designed, for example, that the remaining piece is wedge-shaped and in this one Provides hole, for example, a compression spring record that responds at an elevated temperature. This Compression spring can be made of a memory metal, for example be trained and then reach a certain one Extend temperature. The compression spring then engages under one Inclined surface of the articulated segment of the Fire protection compound on the sloping surface of the wedge-shaped Rest piece and then the sub-segment folds in, because it is pushed up by the spring and then closes the inner cross-section of the outlet connector is smoke-tight. Since there the remaining wedge-shaped piece remains there Part of the cross-section of the outlet connection is smoke-tight locked. Would you be without this wedge-shaped remnant could work there after folding the articulated Part of the fire protection compound is a passage for smoke arise.

Most of these venting devices have a non-return valve which, if there is negative pressure on the discharge side of the Venting device closes. This check valve however, is generally not fire resistant. By the inward folding sub-segment of the invention Fire protection compound that lies over this check valve, it is also protected against the effects of heat.

The features mentioned in subclaims 2 to 9 relate to preferred developments of the first variant of Task solution according to the invention. The in the subclaims Features 11 to 17 refer to preferred Developments of the second variant of the invention Task solution. Further advantages of the invention Solutions result from the following Detailed description.

Fig. 1

einen Längsschnitt durch eine erfindungsgemäße Brandschutzeinrichtung für den Ausblasstutzen;

Fig. 2

eine Ansicht von oben in Richtung des Pfeils II von Fig. 1 gesehen;

Fig. 3

einen entsprechenden Längsschnitt durch die Brandschutzeinrichtung und den Ausblasstutzen in der geschlossenen Stellung der Verschlußklappe;

Fig. 4

eine entsprechende Draufsicht auf die Brandschutzeinrichtung in Richtung des Pfeils IV von Fig. 3 gesehen;

Fig. 5

einen Längsschnitt durch eine Wand- oder Deckenabsperrvorrichtung gemäß einer alternativen Ausführungsvariante der Erfindung;

Fig. 6

eine Ansicht von oben in Richtung des Pfeils VI von Fig. 5 gesehen;

Fig. 7

einen Längsschnitt entsprechend Fig. 5 durch die Wand- oder Deckenabsperrvorrichtung mit geschlossener Stellung der Verschlußklappe;

Fig. 8

einen Längsschnitt durch einen Ausblasstutzen eines Entlüftungsgeräts gemäß einer alternativen Variante der Erfindung;

Fig. 9

eine Draufsicht auf den Ausblasstutzen in Richtung des Pfeils IX von Fig. 8;

Fig. 10

eine entsprechende Schnittansicht nach dem Verschluß des Ausblasstutzens durch das Teilsegment der Brandschutzmasse;

Fig. 11

eine entsprechende Draufsicht auf den Ausblasstutzen in der Verschlußstellung gemäß dem Pfeil XI von Fig. 10.

The present invention is described in more detail below on the basis of exemplary embodiments with reference to the accompanying drawings. Show

Fig. 1

a longitudinal section through a fire protection device according to the invention for the exhaust port;

Fig. 2

seen a view from above in the direction of arrow II of Fig. 1;

Fig. 3

a corresponding longitudinal section through the fire protection device and the outlet port in the closed position of the closure flap;

Fig. 4

a corresponding top view of the fire protection device seen in the direction of arrow IV of Fig. 3;

Fig. 5

a longitudinal section through a wall or ceiling shut-off device according to an alternative embodiment of the invention;

Fig. 6

seen a view from above in the direction of arrow VI of Fig. 5;

Fig. 7

a longitudinal section corresponding to Figure 5 through the wall or ceiling shut-off device with the closed position of the flap.

Fig. 8

a longitudinal section through a discharge port of a ventilation device according to an alternative variant of the invention;

Fig. 9

a plan view of the exhaust port in the direction of arrow IX of Fig. 8;

Fig. 10

a corresponding sectional view after the closure of the exhaust port through the sub-segment of the fire protection compound;

Fig. 11

a corresponding plan view of the exhaust port in the closed position according to arrow XI of FIG. 10th

First, reference is made to FIGS. 1 and 2. The illustration shows the outlet connector 10 with the Fire protection device, the ventilation device itself is not shown. The blow-out nozzle 10 has one Side an end flange 16 with holes 17, the Fasteners are suitable for the Fastening the outlet nozzle to the ventilation device.

The outlet nozzle has a lower part 11 with a larger outside diameter and an upper narrower part 12 with a smaller outer diameter, wherein in Transitional area between the lower part 11 and the upper Part 12 a paragraph 13 is formed. Both the lower one Part 11 of the blow-out connector takes a fire protection compound 15 on, which foams when heated as well as the upper one in Outer diameter takes narrower part 12 of the exhaust port a fire protection compound 14 of the same type. The fire protection compound However, as can be seen from FIG. 2, 14 is in segments arranged so that there is an even square about square inner cross-section 21 of the outlet nozzle results, each through the inner edge of the fire protection compound 14 is limited. On its outer circumference is the Air outlet 10, however, both in the narrower upper part 12 as well as round in the further lower part 11.

It can be seen from FIG. 1 that the fire protection compound 14, 15 is embedded a bracket 20, which is in its upper part parallel to the wall of the upper part 12 of the outlet nozzle 10 extends and which is relatively narrow, as can be seen from the Can see top view according to Figure 2. This bracket sets down in a right angled inward Part 20b continues and sits in one at its upper end also part 20a angled inwards at right angles away. This bracket 20, 20a, 20b is used to attach the movable closure flap 18. From Figure 1 one can recognize that this flap 18, which is preferably made there is also a spring plate at its upper end is angled at right angles to the outside, so that it the corresponding one in this angled section 18a angled portion 20a of the bracket overlaps, wherein this angled part 18a of the closure flap 18, however is wider than part 20a of the bracket as can be seen in FIG. 2 recognizes. In this overlapping area between Closure flap 18a and bracket 20a are both together connected for example by fasteners such as Screws 19, rivets or the like.

The closure flap 18 then extends downwards over the entire inner width of the outlet nozzle on one Side along the inner cross section 21 of the blow-out nozzle as can be seen from Figure 2. So it's as wide as that Air outlet inside and as long as that Ausbaasstutzen as you can see from Figure 1. On hers the lower end is this flap 18 via a fusible link 22 with the inwardly angled part 20b of the Attachment serving bracket 20 connected. This solder 22 consists of a mass at a given elevated but not too high temperature melts, for example on the order of about 70 ° C. If that Fusible link 22 has melted, then the moves existing closure flap 18 under spring tension Spring plate around its upper edge 18b serving as a hinge (see Figure 1) in a swiveling movement up and in and closes the inner cross section 21 of the blow-out connector 10. The spring force of the closure flap 18 is designed so that this on the opposite side of the inner cross section 21, which is limited by the fire protection compound 14, strikes and maybe bends something like one can be seen from Figure 3.

In the closed position according to Figure 1 is parallel to Closure flap 18, the non-return flap 23 around their The pivot axis 23a is pivotally mounted and is shown in FIG is also in the open position accordingly Working state of the ventilation device. The storage of the Check valve 23 is so that this in reverse Direction of rotation pivots like the flap. Now moves when the fusible link 22 melts, the closure flap 18 inward position shown in Figure 3, then takes this closure flap 18 the lying in front of this Check valve 23 with and also moves this in the Figure 3 shown closed position in which the free end the check valve 23 also on the fire protection compound 14 on the opposite side of the outlet strikes. It can be seen from Figure 4 that the closure flap 18 is dimensioned so that it is almost square square inner cross section 21 of the blow-out connector 10 completely closes, because the closure flap 18 is in Outline rectangular. In the closed position according to FIG Closure flap 18 obliquely in the exhaust port, since it is in its Length corresponds to the length of the outlet nozzle. The Check valve 23 is something in the embodiment shorter than the closure flap 18 and lies in it Lock position according to Figure 3 also obliquely in Air outlet.

Reference is now made to FIGS. 5 to 7 and based on this an alternative embodiment of the Invention described. In this case, the Fire protection device according to the invention application in a Wall or ceiling barrier. The principle of operation corresponds essentially to that in the above described fire protection device for a Venting device. The fire protection device is overall designated 100. Your housing has an upper one Outer diameter narrower nozzle 102, which is connected to a Ventilation pipeline (not shown) can be connected can. At the bottom a paragraph 113 is formed and there follows a part 111 with a further outer diameter. Further down, the tubular housing tapers again it ends in a lower nozzle 104, which in its Diameter corresponds approximately to the upper nozzle 102 and can also be connected to a ventilation pipe can. This fire protection device 100 is preferably in a ventilation pipe system in the area of a wall or Ceiling bushing installed. The one described above Variant according to FIGS. 1 to 4 existing flange 16 for the Attachment to a ventilation device is of course not necessary the variant according to FIGS. 5 to 7. Inside is the However, the structure is very similar to that described above Variant of the invention. It's how you see it Fire protection compound 114 is present, the inside of the nozzle lines and also the fire protection compound 115 for the here middle further part of the tubular housing Fire protection device 100. The inner cross section 121 can also be rectangular or square here. Likewise is present in the fire protection compound 114, 115 embedded bracket 120. The is also available Flap 118 and the check valve 123, also here the closure flap 118 via a fusible link 122 or the like with the angled part of the attachment serving bracket 120 is connected. How it works corresponds to the fire protection device described above is only the use for other applications intended. Fig. 6 shows the associated top view of the Fire protection device 100, and Fig. 7 shows the longitudinal section with closed flap 118.

8 is referred to. The illustration shows the Fire protection device according to the invention with the Blow-out nozzle 110, which contains a fire protection compound 121 and for example over the flange 113 and with the help of Fasteners provided by mounting holes 116 be recorded (see Fig. 11) or similar to one Venting device can be attached. The venting device is not shown in the drawings. This Blow-out connection 110 has one, as can be seen from FIG. 8 another lower section 111 with a larger outer diameter and a narrower upper section 112 with a smaller one Outside diameter, however, both sections of the Blow-out nozzle 110 with the fire protection compound 121 inside like this are lined that the inner cross section of the Blow-out nozzle 110, which is effective in terms of ventilation, is constant. In the present case it is about an approximately square inner cross-section 122 as shown in FIG Fig. 9 recognizes that the fire protection compound 121, which is fixed is arranged, consists of three segments. In addition, is a articulated sub-segment 114 of the fire protection compound is provided, which shows as Fig. 8, both in the narrower upper Section 112 as well as down over part of the further lower section 111 of the outlet nozzle extends. This articulated sub-segment 114 is made up of two sloping side surfaces 114f limited (see Fig. 9). This articulated segment 114 is penetrated inwards the inner edge 114c delimits. At its bottom has this Segment 114 is not a straight end surface, but also closes an inclined surface 114a (see FIG. 8 and also FIG. 10). The purpose of this inclined surface 114a will be explained below explained in more detail. The fixed remaining wedge-shaped The remaining piece 115 according to FIG. 10 has a corresponding one Inclined surface 115a, on which the articulated segment 114 with rests on its inclined surface 114a. Where the exhaust port the articulated segment 114 also tapers the fire protection compound so that a shoulder 114d is formed there and the lower portion 114e of the movable segment 114 is thicker.

Such a fire protection device can also be used on others Be used in a ventilation pipe, there where there is no such venting device.

As can be seen from Fig. 10, is in the wedge-shaped remnant 115, which if the articulated Sub-segment 114 folds inward, remains, a hole 118, which is a spiral, for example Compression spring 119 receives. In the initial state according to FIG. 8 this compression spring 119 is tensioned. This compression spring 119 consists of a memory metal which, when heated to a certain temperature due to the shape memory effect itself extends into the position shown in Fig. 10 and thereby moving segment 114 about hinge axis 114b thereof can tilt inwards. This is facilitated by the fact that movable segment 114 with the inclined surface 114a rests the inclined surface 115a of the wedge-shaped remaining piece 115, so that rather a tipping moment arises. By moving the articulated segment 114 from the starting position according to FIG. 8, in which the check valve 120 is open, this is also taken and their closed position according to FIG. 10 emotional. 10 is how to sees the square inner cross section 122 of the Fire protection compound 121 and thus the outlet connector closed (see also Fig. 11). By the invention Use of the wedge-shaped remnant 115 arises in the Tilting movement of the movable segment 114 in the lower further Section 111 of the exhaust port 110 has no opening would allow smoke to pass through. The square Cross section 122 of the exhaust port is rather how to get out 11 recognizes through the movable sub-segment 114 completely closed, which is not easily possible would be if the moving segment 114 were made in one piece would form without the wedge-shaped remaining piece 115. Kick an even higher temperature, then both foams Fire protection compound from which the segment 114 is made up as also the fixed fire protection compound 121 with which the Blow-out spigot 110 lined on the three other sides is (see Fig. 9), whereby also by the wedge-shaped Remnant 115 everywhere enough fire protection compound for one effective closure of the blow-out nozzle when foaming is available.

Claims (17)

Fire protection device for a ventilation pipe, especially for the exhaust port Venting device or a wall or Ceiling shut-off device being the wall of a nozzle is lined with a fire protection compound, which at foamed at elevated temperature (intumescent foam), characterized in that a closure device (18, 114) is provided, which is open when not in use stands and is arranged parallel to the axis of the nozzle and that a triggering device (22, 119) is provided, which is designed to be at a given triggers higher temperature that below the Foaming temperature of the fire protection compound (14, 15) with this triggering process the previously in their Locking device held open released is and automatically by a swivel movement in a closed position in which it moves the cross section closes the neck. Fire protection device for a ventilation pipeline Claim 1, characterized in that the Closure device is a flap (18) and the trigger device is a fusible link (22). Fire protection device for a ventilation pipeline Claim 1 or 2, characterized in that the Closure flap (18) made of spring plate that a upper part (18a) of the closure flap (18) held and the lower end of the closure flap (18) over a fusible link (22) with a rigid part (20b) of the Connection is connected, so that when the The closure flap (18) fuses into the Closed position moves. Fire protection device for a ventilation pipeline one of claims 1 to 3, characterized in that serves as a fixed part a bracket (20, 20a) on which the closure flap (18) at one end (18a) Fastening means (19) such as screws or the like is attached. Fire protection device for a ventilation pipeline one of claims 1 to 4, characterized in that the outlet nozzle is rectangular or square Has inner cross section (21), each through the Inner edge of the fire protection compound (14) is limited. Fire protection device for a ventilation pipeline one of claims 1 to 5, characterized in that the outlet spigot with a lower part (11) a larger outer diameter and an upper narrower Has part (12) with a smaller outside diameter, in the transition area between the lower part (11) and a shoulder (13) is formed in the upper part (12) and both the lower further part (11) of the outlet nozzle a fire protection compound (15) as well as the upper one narrower part of the outlet fitting is a fire protection compound (14) records. Fire protection device for a ventilation pipeline one of claims 1 to 6, characterized in that the bracket (20) to which the flap (18) is attached is one in the open position of the shutter this parallel part (20), which in the Fire protection compound (14, 15) is embedded. Fire protection device for a ventilation pipeline one of claims 1 to 7, characterized in that a check valve (23) in the outlet port is arranged, the pivotal movement of the Locking flap (18) also in its closed position its axis (23a) pivots into the closed position. Fire protection device for a ventilation pipeline one of claims 1 to 8, characterized in that this is a tubular housing with an upper narrower Part (102), a middle further part (111) and one lower narrow part (104), the parts (102) and (104) each to a ventilation pipe are connectable and the device (100) as a wall or Ceiling locking device is used. Fire protection device for a ventilation pipeline Claim 1, characterized in that the Locking device an articulated in the exhaust port arranged sub-segment (114) of the fire protection compound, that when the triggering device (119) is triggered in Direction on the pipe axis of the outlet nozzle tilts and thereby the inner cross section of the blow-out nozzle closes. Fire protection device for a ventilation pipeline Claim 10, characterized in that the articulated trained sub-segments (114) of the fire protection compound an articulated upper segment and one below arranged wedge-shaped remnant (15) is provided, on which the movable sub-segment (14) with a Inclined surface (14a) rests. Fire protection device for a ventilation pipe, especially for the exhaust port Venting device according to claim 1, 10 or 11, characterized characterized in that below the articulated Sub-segment (114) in a hole in the fire protection compound (115) a compression spring (119) is provided, which as Tripping device is used. Fire protection device for a ventilation pipe, especially for the exhaust port Venting device according to claim 1 or one of the Claims 10 to 12, characterized in that the Compression spring (119) made of a memory metal or the like exists and when heated to a predetermined Temperature expands and then the articulated sub-segment (114) can tilt inward about its hinge axis (114b). Fire protection device for a ventilation pipe, especially for the exhaust port Venting device according to claim 1 or one of the Claims 10 to 13, characterized in that the Discharge nozzle a rectangular or square Has inner cross section (122) by a Lining is formed from the fire protection compound (121). Fire protection device for a ventilation pipe, especially for the exhaust port Venting device according to claim 1 or one of the Claims 10 to 14, characterized in that the Air outlet (110) is round on the outside and a tighter one upper section (112) with a smaller outer diameter and another lower section (111) with a larger one Has outer diameter. Fire protection device for a ventilation pipe, especially for the exhaust port Venting device according to claim 1 or one of the Claims 10 to 15, characterized in that at step-shaped outer diameter of the outlet nozzle (110) which is lined with a fire protection lining (121, 114, 115) formed inner cross section (122) of the Blow-out nozzle over its length is constant. Fire protection device for a ventilation pipe, especially for the exhaust port Venting device according to claim 1 or one of the Claims 10 to 16, characterized in that a articulated check valve (120) is provided, which in their open position parallel to the axis of the Blow-out nozzle (110) and in the case of heating caused the articulated part segment to tilt inwards (114) taken the check valve (120) and into it Lock position is moved.

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