EP1762276B1 - Trip device to trip a closing member which seals at least one duct of an air system - Google Patents

Description

The invention relates to a triggering device for triggering at least one closing a line of a ventilation system occlusive shut-off and / or releasing smoke extraction element, comprising at least one thermally unlockable retaining member, which with a drive device for the shut-off in the shut-off in the normal operating case in the open position holding or the smoke extraction in the closed position holding operative connection is, wherein the retainer has a pin-like, encapsulated design and protrudes into the interior of the conduit.

Air-conditioning systems are used in buildings for supplying fresh air and for removing exhaust air from the individual rooms of the building. The individual rooms are connected to each other with lines of this system. In a fire, however, there is the danger over such a ventilation system that fire-causing substances, such as hot gases, sparks or flames are transmitted from one room to an adjacent room via the lines. A fire which initially only occurs in one room or in a few rooms can thereby spread throughout the entire building.

To counteract this, shut-off elements are known, which are assigned to lines of ventilation systems and close the cross section of such a line in case of fire. The closing of the line is carried out by a generic tripping device in case of fire. The triggering device has for this purpose a holding member which holds the shut-off element in an open position releasing the cross section of the line in the normal operating state without the occurrence of a fire. However, if a fire occurs, the holding member is thermally unlocked and with force of the drive means, the shut-off element is transferred from an open position to a closed position. In addition to shut-off elements and elements are known that open in case of fire. These elements may, for example, be smoke extraction elements.

A triggering device of the type mentioned is from the DE 2031456 known. There, the holding member is formed by a protruding into the interior of the conduit housing, in the housing while a fusible link is arranged. For the fusible member, an opening is left in the housing so that air passing through the conduit can come into contact with the fusible link. The fusible link consists of two partially superimposed plates, which are connected to each other with a fusible link.

The arrangement of two partially superimposed platelets inside a line, however, requires a design effort. It must be provided platelet holders, which receive the platelets. These plate holders are in turn to be arranged inside the pipe. That from the DE 2031456 known housing has an opening for arranging the platelets. The platelet holders flowing around and passing through this opening air is swirled, so that the flow of air guided in the conduit is disturbed.

Another construction for retaining pins is off EP 0 126 107 known.

The invention has for its object to provide a triggering device of the type mentioned, which has a constructive simplicity and which ensures reliable triggering of the shut-off in a streamlined arrangement possibility inside the line.

This object is inventively achieved in that the retainer is designed as a hollow profile, on whose befindlichem in the line free end a cap is placed and wherein the hollow profile and cap are formed of thin-walled materials.

In the tripping device according to the invention an encapsulated design is provided. The retainer therefore has no openings through which air has to pass. Flow disadvantages are avoided. It is provided that the holding member is pin-shaped and has an encapsulated design. A pen-like design is a structurally simple design, so that the manufacturing cost is reduced. The encapsulation of the retainer also provides protection against water, corrosion and dust. Such foreign matter can not settle on angular sections of the holding member and thus do not jeopardize its function.

According to the invention it is provided that the holding member is formed as a hollow profile, on whose located in the line free end a cap is placed, wherein the hollow profile and cap are formed of thin-walled materials. This makes it possible to form now only a component of a fusible material.

Hollow profile and cap are formed according to the invention of thin-walled materials, also can be provided a large solder for connecting these components. The thin wall allows rapid access of heat from the air flowing around the retaining member in the vicinity of the solder. The heat capacity of the triggering element is tuned to the external and internal heat transfer such that an external heating and air flow given by requirement norms within a certain time leads to the triggering (melting). In addition, the mechanical strength is chosen so that no premature release occurs.

According to a first embodiment of the invention, it is provided that with the holding member operatively connected components of the drive means are arranged outside the line. After this development, the holding member with its pin-like, encapsulated design from outside into the interior of the line. Components of the drive device, however, are arranged outside the line, so that they do not affect the guidance of the air through the air line. In addition, these components of the drive device without opening the line from the outside are accessible for maintenance. Also, a possibly arranged in the drive device manual release of the shut-off is easily accessible in this way from the outside.

For the formation of the holding member of the tripping device according to the invention, there are various alternatives. On the one hand, the retaining member can be formed in total from a melting at reaching a defined temperature material. Due to the melting of the holding member its holding function is canceled for the shut-off, so that this can then be transferred from the drive means of the open position to the closed position.

The hollow profile is formed for example of fusible material and / or the cap is made of a fusible material. Finally, it is also possible to form the two components cap and hollow profile of non-melting material, so that they can absorb higher forces, and to connect the two components with the aid of a fusible material. If an elevated temperature occurs, the material melts and the connection of cap and hollow profile is canceled. This reversal can be implemented constructively to achieve a transfer of the shut-off in its closed position. As a fusible material in all cases a fusible link can be used, that for example at 70 ° C or 95 ° C nominal temperature melts safely.

According to a next development of the invention it is provided that in the hollow profile, a push rod is received, which is acted upon by a force and which is supported on the cap, wherein the push rod is a coupled to the shut-off component of the drive means. Hollow profile and cap form the holding member. The retaining member receives a force which holds the butterfly valve in the open position. This force is transmitted to this development by the push rod on the cap. The cap holds the push rod in a certain position in the non-molten state of the solder. If an elevated temperature occurs and melts the melting solder between the cap and the hollow profile, the cap can fall off and the push rod is free. Since the push rod is acted upon by a force, preferably with a spring force, it can change their position after the cap has been omitted or at the same time cause the cap to be dropped. This change in position is implemented in a suitable manner in a movement of the shut-off. The push rod is preferably made of a plastic. This ensures advantageous that no heat is removed from the cap via the push rod and corrosion is avoided.

The spring force for the push rod is generated by a spring, which is held in a holder of the push rod associated. The holder of the spring can be made according to a development of the invention of a material which is meltable at a defined temperature. The material used for example is plastic, which softens at elevated temperature. The holder of the spring is no longer in this soft holder, they can slip out of the holder and thereby trigger a movement of the shut-off. With the help of this made of fusible material spring holder thus a further emergency release of the shut-off is given.

By receiving a push rod in the hollow profile, it is advantageously not necessary, suspension components of the triggering device in the Push rod and thus to receive in the holding member. This manages the reduction and compact design of the encapsulated holding member. At the same time occurs a reduction of the thermal inertia, which leads to a reduction of the thermal-dynamic threshold. The temperature and time-related response of the retainer is thus improved. This meets the demanding criteria of ISO 10294-4.

In order to allow movement of the shut-off element, according to a development of the invention, at least one spring is accommodated in the drive device, with the force of which the shut-off element can be transferred into its closed position, and that this spring is a locking means for locking the spring in the prestressed state assigned. In the open state of the line, the shut-off element is under the influence of a force which converts the shut-off element into its closed position for closing the line. However, this force is blocked by the locking means, so that the butterfly valve remains in the open position. The blockage of the spring for the shut-off is only resolved when an elevated temperature occurs. For this purpose, it is provided that the push rod is linked to the locking means. If the retaining member is destroyed by the elevated temperature, the resulting movement of the push rod is transmitted to the locking means, which then gives up its locking of the spring of the shut-off. The spring force is released and the shut-off can get into its closed position or get a smoke control element in its open position.

For further embodiment of the invention is still provided that the drive means is arranged in a housing which is attached from the outside to the line and from which the holding member projects into the conduit. The drive device for the shut-off can be made compact. Due to this compactness, the drive device in the housing of the line to be protected, for example in the section of the arrangement of Fire damper in the line directly assignable. Compact sizes are the result, which also the installation of the tripping device in the line and the installation of this line, z. B. in the area of a breakthrough of a wall easier.

After a next development it is provided that the hollow profile, the push rod and the cap can be removed from the housing. Due to the removability a simple replacement of these components is possible. These components comprise the area of the arrangement of the fusible link, so that a simple interchangeability of the fused solder is given. In addition to an interchangeability of the fused solder is also ensured by the removability that running characteristics of the push rod and spring effects of the push rod associated springs can be checked.

The push rod can be fixed with at least one screw in the housing. To set this fixation for a longer use of the triggering device, a development of the invention provides that the screw is associated with a lock.

In order to increase the service life of the holding member of the triggering device according to the invention, it is also provided that the holding member preferably has an anti-corrosion coating. Furthermore, it can still be provided that the drive device is assigned a remote triggering device. In this case, electronic components of the remote triggering device, in particular boards for a BUS system, can be introduced.

Fig. 1:

eine Draufsicht einer Auslöseeinrichtung zum Auslösen zumindest eines Absperrelementes;

Fig. 2:

eine Schnittansicht der Auslöseeinrichtung entlang der Schnittlinie II-II in Fig. 1;

Fig. 3

eine Seitenansicht der Auslöseeinrichtung gemäß Fig. 1;

Fig. 4 und 4a:

eine Schnittansicht der Auslöseeinrichtung entlang der Schnittlinie IV-IV in Fig. 1, wobei in Fig. 4a eine maßstäbliche Vergrößerung der Einzelheit Iva in Fig. 4a dargestellt ist;

Fig. 5:

eine weitere Schnittansicht der Auslöseeinrichtung;

Fig. 6a,b,c:

eine maßstäbliche vergrößerte Einzelheit eines Bauteils der Auslöseeinrichtung in Fig. 5 und

Fig. 7 bis 11

Seitenansichten und maßstäblich vergrößerte Teilseitenansichten einer weiteren Ausführungsform einer Auslöseeinrichtung.

An embodiment of the invention, from which further inventive features arise, is shown in the drawing. Show it:

Fig. 1:

a plan view of a triggering device for triggering at least one shut-off element;

Fig. 2:

a sectional view of the triggering device along the section line II-II in Fig. 1 ;

Fig. 3

a side view of the triggering device according to Fig. 1 ;

4 and 4a:

a sectional view of the triggering device along the section line IV-IV in Fig. 1 , where in Fig. 4a a scaled enlargement of the detail Iva in Fig. 4a is shown;

Fig. 5:

a further sectional view of the triggering device;

6a, b, c:

a scaled enlarged detail of a component of the triggering device in Fig. 5 and

Fig. 7 to 11

Side views and scaled enlarged partial side views of another embodiment of a triggering device.

The triggering device has an approximately cuboid-shaped housing 1. The housing 1 is penetrated by a shaft 2, which is in operative connection with a pivotable shut-off element, not shown. On the shaft 2, a hand lever 3 is articulated, which serves to reset the triggered drive device. In the Fig. 1 shown surface of the housing 1 is still penetrated by a pin 4, which allows a manual release of the triggering device.

Fig. 2 and 3 show that the shaft 2 is acted upon by a spring 5. With the spring 5 is a locking pin 6 in conjunction. This locking pin 6 is as in Fig. 4 can be seen fixed by a trained as a rocker locking 7. The locking means 7 is an in Fig. 4 pivoting out of the plane of the drawing 8 axis. With a projection 9 of Arretierungsmittels 7, the locking pin 6 is released or fixed during pivoting. A release of the locking pin 6 leads to a release of the forces of the springs 5 and subsequently to a rotation of the shaft second

The locking means 7 is characterized by a return spring 10 ( Fig. 4 ) in the Fig. 4 shown position, as long as not via the pin 4 is a manual release or firing occurs. In a manual release, a force is exerted on the locking means 7 with the pin 4, which leads to a pivoting of the locking means 7 and to release the forces of the spring fifth

In order to trigger the triggering device in case of fire, a holding member 11 is provided. The holding member 11 has a pin-like, encapsulated design. It projects from the interior of the housing 1 to the outside and can thereby be introduced into the interior of a conduit of a ventilation system.

The holding member 11 consists of a hollow section 12 and a fixed with the aid of a fused solder 13 to the hollow section 12 cap 14, as in Fig. 4a shown.

The hollow profile 12 and arranged in the hollow profile 12 push rod 15 (FIG. Fig. 5 ) are loaded by a spring 16. With the cap 14 is in in Fig. 4 shown normal case, the force of this spring 16 retained.

Figure 5 shows the triggered case. After melting the fusible link 13, the force acting on the push rod 15 spring force of the spring 16 is released. As a result, a linear displacement of the push rod 15 is generated. As a result, the cap 14 is repelled by the hollow profile 12 and the locking means 7 and the return spring 10 are guided against the wall of the housing 1. The projection 9 of the locking means 7 releases the locking pin 6 so that it releases the force of the spring 5. The spring force can be used to close the shut-off element.

It depends on a geometric matching of retaining member 11, cap 14, solder surface and melting temperature of the fusible link 13, heat dissipation especially on the push rod 15 and the spring force of spring 16. The thinness of the hollow section 12 and cap 13 is an important aspect in solving the overall problem of a fully enclosed trip device.

In this case, there is a soldering seam applied to shearing (pulling apart). Previous constructions, eg the DE 195 10 025 , show soldering claimed on flat tensile. To obtain the necessary before the release tensile strength then large areas are required. This leads to a filigree construction as in the invention is not meaningfully possible.

In Fig. 6 a to c the spring 16 for the push rod 15 is shown. The recording of the spring 16 are spring supports 17, which are formed as annular profiles with a stepped cross-section.

The holders 17 are formed of a meltable material at defined temperatures. The material used for example is plastic, which softens at elevated temperatures. As in Fig. 6b shown, after a softening of the holder 17 turns of the spring 16 slide over the bracket 17 away and are guided against the locking means 7. In Fig. 6c is shown that in this way the locking means 7 can be deflected so far that a triggering of the shut-off takes place.

In the FIGS. 7 to 11 illustrated embodiment is similar to the embodiment described above. Therefore, like components are designated by like reference numerals. Deviating from this second embodiment is that the hollow section 12, the push rod 15 and the cap 14 can be removed from the housing. For this purpose, the push rod 15 is connected to a base element 18 that can be connected to the housing wall 1. On the base element 18, the hollow profile 12 is placed. Fig. 8 shows that the base member 18, which is screwed into an opening of the housing 1, is equipped with a lock. The lock is formed by a pin 19, which is arranged in the region of a recess in the peripheral edge of the base element 18 in the housing 1.

Fig. 10 shows that the pin 19 can be pulled out a little way from its original position directly on the housing 1. As a result, a protruding edge 20 of the base element 18 is free. In this projecting edge 20, the recess is in the periphery of the base member 18. By pulling out the pin 19, this recess is released and the base member 18 can be rotated. This is the in Fig. 10 shown removal of the push rod 15 from the housing 1 and the hollow section 12 allows. Fig. 11 shows the subsequent expansion of hollow section 12 and cap 14 from the housing first

Fig. 9 shows the installed state with the assignment of pin 19 and base element 18. In Fig. 9 If the triggering device is triggered, the cap 14 is removed from the hollow profile 12, the push rod 15 has been displaced due to the attack of the force of the spring 16 in the push rod 12, whereby the locking means 7 has been released.

Claims (18)

1. A tripping device for tripping at least one shut-off element which closes and/or a smoke extraction element which opens a line of a ventilation system, comprising at least one thermally unlockable holding element (11), which is in an active connection with a drive device for the shut-off element, said active connection in the normal operational state holding the shut-off element in the open position and holding the smoke extraction element in the closed position, wherein the holding element (11) has a pin-like encapsulated design and projects into the interior of the line, wherein the holding element (11) is constituted as a hollow profile (12), on the free end whereof located in the line a cap (14) is placed and wherein the cap is constituted by thin-walled materials, characterised in that the hollow profile (12) is also constituted by thin-walled materials.
2. The tripping device according to claim 1, characterised in that components of the drive device in active connection with the holding element (11) are disposed outside the line.
3. The tripping device according to claim 1 or 2, characterised in that the holding element (11) is made of a material that fuses when a defined temperature is reached.
4. The tripping device according to any one of the preceding claims, characterised in that the cap (14) is produced from a fusible material.
5. The tripping device according to claim 4, characterised in that the cap (14) is connected to the hollow profile (12) by means of a fusible material.
6. The tripping device according to any one of claims 3 to 5, characterised in that the fusible material is a fusible solder (13).
7. The tripping device according to any one of the preceding claims, characterised in that a push rod (15) is received in the hollow profile (12), said push rod being acted upon by a force and being supported on the cap (14), wherein the push rod (15) is a component of the drive device that is coupled with the shut-off element.
8. The tripping device according to claim 7, characterised in that the push rod (15) is acted upon by a spring force.
9. The tripping device according to claim 8, characterised in that the spring force is provided by a spring (16), which is held in a holding fixture (17) made of material fusible at a defined temperature.
10. The tripping device according to any one of claims 7 to 9, characterised in that at least one spring (5) is accommodated in the drive device, with the force whereof the shut-off element can be transferred into the closure position, and that a locking means (7) for locking the spring (5) in the pretensioned state is assigned to this spring (5).
11. The tripping device according to claim 7 and 10, characterised in that the push rod (15) is linked with the locking means (7).
12. The tripping device according to any one of the preceding claims, characterised in that the drive device is disposed in a housing (1), which is placed from the exterior on the line and from which the holding element (11) projects into the line.
13. The tripping device according to claim 12, characterised in that the hollow profile (12), the push rod (15) and the cap (14) can be removed from the housing (1).
14. The tripping device according to claim 13, characterised in that the push rod (15) is fixed in the housing (1) by a least one locking screw.
15. The tripping device according to claim 14, characterised in that a locking means is assigned to the locking screw.
16. The tripping device according to any one of the preceding claims, characterised in that the holding element (11) has an anti-corrosion coating.
17. The tripping device according to any one of the preceding claims, characterised in that a remote tripping device is assigned to the drive device.
18. The tripping device according to claim 12 and 17, characterised in that electronic components of the remote tripping device, in particular printed circuit boards for a BUS system, are introduced into the housing (1).

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