Shut-off device for media-carrying lines that closes in the event of a fire

Abstract

Shut-off device for an air or media-carrying line, characterized in that one or more slide devices, each with superimposed slides, are arranged on one side of a flow cross-section 14 of the line, which are held in position by a closure element 6, so that the flow cross-section is open for the medium flowing through and that, when triggered, the closure element 6 releases the movement of the slide(s) and one or more drive elements 7 move(s) the slide(s) in a linear movement substantially perpendicular to the axis of the flow cross-section 14 into the flow cross-section into a closed position, so that the flow cross-section is closed by the slide(s).

Description

Technical FieldIn the event of a fire, ventilation lines contain the risk that fire and smoke are transmitted through them within a building and thus risks can arise in parts of the building which are primarily not affected by a fire in a room. In order to prevent this risk, either fire protection flaps or so-called shut-off devices are installed in ventilation lines, which shut off the ventilation line in the event of a fire and thus prevent a transfer of fire and smoke through the ventilation line. Fire protection flaps can be operated by motor or have, as is customary in shut-off devices, triggering elements which, in the event of a fire, bring about a closure of the flow cross section of the ventilation line as a result of the elevated temperature. Shut-off devices and fire protection flaps differ in particular in the underlying technical specification. While fire protection flaps typically have at least one geometrically defined flap leaf as closing element, the closing of the flow cross section in shut-off devices is effected by slides or foaming intumescent material.PRIOR ART, DEFICIENCIES, PROBLEMSShut-off devices which do not have mechanical slides for closing the flow cross section are known. Here, the flow cross section is closed by intumescent material in the event of a fire, which foams at elevated temperature and thus closes the flow cross section. A disadvantage of this construction is that greater pressure differences between one side and the other side of the shut-off device can lead to blowing through and thus failure of the shut-off device. Furthermore, with a vertical line arrangement, the shut-off device can be pierced by parts which fall down in the line from above, which in turn leads to failure of the shut-off device.Shut-off devices with rotary valves are known. These have the problem that a part of the normally circular flow cross section, typically one third, is covered by the slides lying one behind the other in the open state. This results in flow losses, turbulence and flow noises.In another known construction, the valves for blocking off the flow cross section are each arranged on one side of the normally circular flow cross section. As a result, installation space is required for the second slides in two directions, as a result of which this design is of relatively large construction in two directions.It is the object of the present invention to propose a shut-off device in which the installation space is reduced in particular on three sides of the flow cross section.This object is achieved with a shut-off device having the features of claim 1. Advantageous embodiments are found in claims 2 to 10.By arranging at least two slides lying one above the other, which are located on one side of the flow cross section in the open position, the shut-off device can thus be constructed to be small on three sides of the flow cross section. This is advantageous if the air line guide is to be placed in a corner of the room as close as possible to both walls.EXEMPLARY EMBODIMENT, DESCRIPTIONIn an embodiment of the shut-off device according to the invention, it has, according to FIG. 1, an upper housing part 1 and a lower housing part 2, which form a housing and in which the components and the mechanism for closing the shut-off device are arranged in the event of a fire.For connecting pipelines, the shut-off device according to the invention can be designed on one side or on both sides with connecting pieces 12 which are each equipped with or without a connecting piece seal 13.The upper housing part 1 and the lower housing part 2 each have an opening, wherein the openings each form the flow cross section 14, through which the air or another medium flows through the shut-off device.FIG. 2 shows the lower housing part 2 with the installed closing mechanism without upper housing part 1.Rails 3 are arranged in the housing, in a preferred embodiment a rail 3 on one side of the flow cross section 14 and a rail 3 on the other side of the flow cross section 14. On the first slide 4 is arranged a further slide 5 of the slide device, which is guided on the first slide 4 by form-fitting elements, in a preferred embodiment according to the invention a respective bevel on the left and right, and can thus likewise move linearly from its starting position into a closed position. Between the lower housing part 2 and a slide, preferably the second slide 5, drive elements 7 are arranged, wherein in a preferred embodiment according to the invention the drive elements 7 are tension springs and one of these tension springs is arranged on the left and one on the right of the flow cross section 14. If the closure element 6 enables the movement of the second slide 5, only the second slide 5 initially moves in the direction of the closed position. FIG. 3 shows the two slides in the open position. FIG. 4 shows the two slides in the closed position. The first slide 4 and the second slide 5 have form-fit elements 9, which engage during the closing movement of the second slide 5 and as a result the first slide 4 is moved along into the closed position by the movement of the second slide 5. FIG. 5 shows the lower housing part 2 with the closing mechanism in the closed position without the upper housing part 1.The first slide 4 and the second slide 5 are dimensioned such that when the first slide 4 and the second slide 5 are in their closed position, these slides 4, 5 together cover the flow cross section and thus close the flow cross section.In a preferred embodiment according to the invention, the closure element 6 consists of one or more soldering rivets which are arranged in superposed bores of a holder which is connected to the housing lower part 2 and bores in a respective tab of the first slide 4 and the second slide 5. In the event of a fire, the soldering lead forming the closure element 6 melts or the soldering leads melt if they are several, and the closing movement of the first slide 4 and of the second slide 5 is thereby released.In a preferred embodiment according to the invention, the second slide 5 is secured in its position in the closed position by the latching of the two blocking elements 8 located on the left and right sides in each case into the latching elements 10 provided for this purpose of the second slide 5. The position of the first slide 4 is thus also secured, in the direction of opening by the form-fit elements on the slides 4 and 5, in the direction of closing by the wall of the housing lower part 2.In order to improve the sealing and insulation effect of the closed shut-off device, intumescent material 11 can be used, which foams the gaps between upper housing part 1, lower housing part 2, first slide 4 and second slide 5 that are present in the closed position. The intumescent material can be arranged as a flat ring on the inside of the upper housing part 1 and / or lower housing part 2 on the flow cross section 14 and / or as a sleeve in or in the connecting piece 12.The invention is in principle not limited to the embodiment described. For example, the slide device can also have more than two slides which are arranged lying one above the other.List of reference characters1 Upper housing part 2 lower housing part 3 rail 4 first slide 5 second slide 6 closure element seal 7 drive elements spring 8 blocking element 9 positive locking element 10 latching elements 11 intumescent material 12 connecting piece 13 connecting piece seal 14 flow cross section

Claims

Shut-off device for an air- or medium-conducting line core, characterized in that one or more slide devices with slides which are each located one above the other and which are held in their position by a closure element 6, are arranged on one side of a flow cross section 14 of the line, such that the flow cross section is open for the medium flowing through, and in that, in the case of triggering, the closure element 6 releases the movement of the slide or slides, and one or more drive elements 7 move or move the slide or slides into a closed position in a linear movement substantially perpendicularly to the axis of the flow cross section 14 into the flow cross section, such that the flow cross section is closed by the slide or slides.Shut-off device according to claim 1, characterised in that the slide device is designed as a telescopic slide.Shut-off device according to one of the preceding claims, characterized in that the closure element 6 is connected on one side either to an upper housing part 1 of a housing of the shut-off device or to a lower housing part 2 of a housing of the shut-off device and on the other side to one or more slides.Shut-off device according to one of the preceding claims, characterized in that a first slide 4 of the slide device is mounted on rails 3 which are connected to a housing part, either the upper housing part 1 or the lower housing part 2.Shut-off device according to Claim 4, characterized in that a second slide 5 of the slide device is mounted slidingly on the first slide 4.Shut-off device according to claim 5, characterised in that the drive element 7 or the drive elements 7 drive only the first slide 4 and the second slide 5 enters into a form-fit connection by form-fit elements 9 on the first slide 4 and on the second slide 5 which during the closing movement of the first slide 4 and as a result the first slide 4 moves the second slide 5 along until reaching the closed position.Shut-off device according to claim 5 characterised in that the drive element 7 or the drive elements 7 only drive the second slide 5 and the first slide 4 enters into a positive connection by positive connection elements 9 on the first slide 4 and on the second slide 5 which enter into a positive connection during the closing movement of the second slide 5 and as a result the second slide 5 moves the first slide 4 along until reaching the closed position.Shut-off device according to one of the preceding claims, characterized in that the slide or slides 4, 5 are prevented from moving back by one or more blocking elements 8 after reaching the closed position and thus partially or completely open the closed flow cross section 14 again, wherein the blocking element or slides are arranged either on the upper housing part 1 or on the lower housing part 2 or on one or more slides.Shut-off device according to one of the preceding claims, characterized in that the slides consist of metal or consist of insulating and refractory fire protection material or of two or more material layers, wherein at least one material layer consists of a mechanically solid material and at least one material layer consists of a thermally insulating material.Shut-off device according to one of the preceding claims, characterised in that intumescent material 11 is used, either as a material layer on the slide or the slides, as a ring on the flow cross-section 14 on the upper housing part 1 and / or on the lower housing part 2 and / or as a sleeve on one or both connecting pieces 12.

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