NL1029165C2 - Air installation for rooms in a building. - Google Patents

Description

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P27826NL00 / HJB

I Short description: Air installation for rooms in a building.

The invention relates to fire-resistant measures in an air installation, such as a ventilation installation or air treatment installation in a building, wherein the air ducts | run through passageways in partitions between spaces in the building, for example, through a floor between spaces located one above the other.

An aspect of such a building is fire resistance, so that fire-resistant measures are taken that try to prevent (or delay) a fire from spreading through the building. In connection with this, an attempt is often made to prevent the spread of hot and toxic flue gases throughout the building. Because the air ducts are often provided with entrance and / or outflow openings, in the event of a fire, flames and smoke can enter through the openings into the channel and thus propagate to the other side of the partition, as a result of which the fire spreads to the adjacent room. whether the smoke can spread to the adjacent room. To prevent this propagation, butterfly valves are often placed in the metal air ducts, which automatically close when the temperature rises and thus prevent the propagation of the flames and smoke. Such butterfly valves are expensive and require extra assembly time, suspension facilities and regular operation checks.

The invention has for its object to propose an air installation which in the event of a fire provides a fire-resistant closure of the passage of a metal air duct by a partition between rooms in a building, against an attractive installation effort and investment. It is noted that this solution is not only provided as an alternative to the known butterfly valves, but can also be used in an installation in which one or more butterfly valves are used at strategic places. For example, at 1029165-2 more places than where hitherto butterfly valves are used, a fire-resistant solution according to the invention can be provided.

The object of the invention is at least to propose an alternative solution.

5

The invention provides an air installation according to claim 1.

Fire protection can be achieved with this solution in a technically attractive way.

The invention is based on the fact that the plastic pipe part in fact replaces the metal air duct at the point of passage through the partition. That plastic pipe section becomes soft at the higher temperatures that result from a fire. The temperature rise also leads to the swelling of the intumescent material. Due to the swelling action of the intumescent material, the plastic pipe part that has already become softer can simply be closed, whereby the entire passage is sealed against fire.

Preferably, it is provided for the sleeve to form an assembly together with the plastic pipe part. The metal air duct is then cut or made to size so that it ends just before the passage through the partition. That end is then connected to the plastic pipe part in the assembly of sleeve and plastic pipe part. On the other side of the partition, the next part of the metal air duct is again connected to the plastic pipe part. As a result of this, at the location of the passage through the partition, the metal air duct is replaced by a plastic pipe part. Of course, it is also possible to place the plastic pipe part separately from the fire-resistant sleeve and then to fit the sleeve around this pipe part. In an embodiment which is advantageous for assembly practice, the casing of the fire-resistant sleeve is designed as a flexible metal plate which can be bent around a pipe part.

35

In a preferred embodiment, sound-damping strips are arranged between the fire-resistant sleeve and the plastic pipe part to prevent direct contact between the sleeve and the plastic pipe, whereby the sound transmission between air duct and wall or floor of the building is reduced.

The invention further relates to a fire-resistant assembly for intermediate placement in a metal air duct, and to the combination of a metal air duct with such a fire-resistant assembly which is tuned to the metal air duct.

The invention further relates to a building provided with an air installation according to the invention.

The invention further relates to the method for realizing a fire-resistant seal of both passage and air duct in a building with an installation according to the invention, which method can also comprise rendering a previously installed air installation fire-resistant.

The various solutions according to the invention will be explained below with reference to the drawing. It shows:

FIG. 1 is a perspective view of an embodiment of a fire-resistant assembly according to the invention,

FIG. 2 is a perspective view of the plastic pipe part with two blocking strips arranged thereon; FIG. 3 is a perspective view of an embodiment of the metal sleeve of a fire-resistant assembly according to the invention;

Figure 1 shows a fire-resistant assembly 1 according to the invention for placement in passage of an air duct 6 through a partition, such as a wall or floor, of a building between spaces of the building. The assembly 1 has a sealing effect in the event of a fire.

In this example, the assembly 1 comprises two joined parts, namely the plastic pipe part 2 and the sleeve 3 with intumescent coating on the side facing the plastic pipe part 2. In this example the sleeve of the sleeve is made of flexible steel sheet, but other materials, preferably metals, can also be used for this.

Figure 2 shows the inner part of the assembly, consisting of a plastic pipe part 2, with a connecting part 5 on both sides and the two blocking strips 4, which are at an axial distance from each other and which each have the largest part of the circumference of the plastic pipe. These strips 4 are here made of compressible foam material. These strips 4 are intended to prevent the metal channel 6 from being pushed too far forward when the metal channel 6 is slid onto the connecting part 5 and gets caught between the metal sleeve 3 and the plastic pipe part 2. Instead of compressible strips 4, the strips 4 can also be made of other material, or other stop means for the end can be provided with an air duct 6, which prevent it between the casing and the plastic pipe part of the duct 6.

In this example, the connecting parts 5 are designed as a slightly conical tapered end which tapers towards the end 8, onto which the metal channel 6 can be slid until it is somewhat clamped. The transition between the metal channel 6 and the plastic pipe part 2 is connected to each other on the outside to keep the assembly connected to the metal channel, for example with a piece of self-adhesive tape (not shown), as is known when connecting 2 pieces of metal ventilation ducts. It will be clear that other fastening means are also suitable for making this connection. The connecting part can also be designed in many other ways, inter alia as a sleeve - preferably slightly conically enlarged to the end 8 - where the metal channel 6 is inserted. Also in this case the connection between the metal channel and the plastic pipe part can be made with, for example, tape.

35

Figure 3 shows the sleeve 3 in the unmounted state. Cuff 3 has a stable metal casing part 7. In the drawing it can be seen that this casing part 7 is made of a flexible metal plate, for example a relatively thin plate of stainless steel or steel, for example with a thickness of at most 1 1.5 mm, for example approximately 0.5 mm. In the example, the sleeve is pre-formed into a ring, but it is also conceivable to supply the sleeve in an undeflected state, so more or less as a flat plate. In that case, the sleeve is only fitted around the plastic pipe part 2 at a later stage, for example at the construction site shortly before installation. In such cases, if the sleeve 7 is turned around in the production plant, the wall thickness of the casing or the design of the casing can be entirely different from a relatively thin flexible metal plate, for example a relatively thick-walled tubular shape.

In this example, the metal plate is provided at one end with one or more flexible lips 9 and at an opposite end of one or more associated insert openings not visible in the drawing, so that the casing part 7 can be folded around the pipe part 2 or the like and a lip 9 can be inserted into the associated insertion opening and bent to secure the casing part 3. It will be clear that entirely different closing mechanisms for closing the casing parts placed around the pipe are conceivable.

Suitable intumescent material is provided on the inside of the jacket 3, in this example in the form of a relatively thin layer that completely covers the metal plate.

As is known, intumescent material swells upon exposure to heat, whereby the intended sealing effect is obtained. The stable metal casing part 3 thereby forms an external limit for the swelling of the intumescent material. Instead of a layer, strips or the like could also be provided with intumescent material.

Furthermore, on the inside, the casing part 3 is provided with a number of strips 11 axially spaced from each other. The strips 11 are made of compressible foam material. Such a foam material makes it easy to achieve that the plastic pipe part 2 connects to the inner circumference of the sleeve. This can serve as a sound-insulating measure and for preventing undesired air flow (energy loss) or displacement of smoke in the event of a fire before the intuitions material has been expanded. It is clear that more or just one sound-damping strip will also give the desired result. In this example, the strips are made compressible foamed plastic. Other sound-damping materials, such as rubber, can also be used.

It will also be clear that the sound-damping strips on the inside of the sleeve can be arranged over the intumescent material.

The outside of the sleeve 3 is in this example formed by the outside of the metal plate 7. In practice, a possible gap between the outside of the sleeve 3 that is arranged around the pipe and the partition (wall / wall) will be filled with a filling material, for example mortar, plaster, fire-resistant sealant or the like.

20

In the event of a fire, the intumescent material will swell as a result of the heat and, at the same time, the plastic pipe section will become soft and even melt due to the high temperature. The expanding intumescent hereby fills the entire space within the jacket of the cuff, so that flames and smoke cannot propagate via the passage of the pipe through the partition to the adjoining space.

30 1029165-

Claims (9)

1. Air installation for supplying and / or discharging air to and / or out through a partition, for example a floor, wall or ceiling, separated spaces in a building, comprising one or more metal air ducts provided with (in- and / or or outflow openings for the suction and / or delivery of air from and / or to the spaces, wherein the air installation optionally comprises cooling and / or heating means for the air, characterized in that at the location of a passage of an air duct a fire-resistant assembly is placed in the metal air channel through a partition in the building, which assembly comprises a plastic pipe part which is placed in an interruption of the metal air channel at the location of the passage, so that the plastic pipe part connects at both ends thereof to an associated end of the metal air duct, which assembly further comprises a fire-resistant sleeve that encloses the plastic pipe part with a jacket, at least The intumescent material is provided on the inside of the casing, so that in the event of a fire due to the swelling of the intumescent material, a closing action for the passage is provided. 2. Air installation as claimed in claim 1, wherein the machet is pre-mounted on the plastic pipe part and can be handled as a whole, for instance during assembly in the passage. Air system according to claim 1 or 2, wherein the plastic pipe part has a greater axial length than the sleeve and protrudes outside the sleeve at both ends. 30 Air installation according to one or more of the preceding claims, in which the jacket of the sleeve is made of metal, for example of flexible metal plate. Air installation according to one or more of the preceding claims, wherein one or more compressible strips are between the inside of the sleeve and the plastic pipe part --------- - - ---------- ----- '* 029165-8- applied, for example, of plastic foam material, such that any gap between the sleeve and the pipe is sealed, for example to prevent sound transmission and / or smoke leakage. 5 Air installation according to one or more of the preceding claims, wherein the ends of the plastic pipe part are arranged as connecting parts for the metal air duct ends, preferably tapered towards the end. 10 Fire-resistant assembly for use in an air installation according to one or more of the preceding claims. 8. Building provided with an air installation according to one or more of the preceding claims. 9. Method for the fire-resistant construction of a building provided with an air installation, wherein use is made of an air installation according to one or more of the preceding claims. 1 ° 29165-