DE29504680U1 - Fire water overflow between neighboring rooms separated by a wall - Google Patents

Description

Augsburg, 17 March 1995 Application file: BL.3522

Blobel Environmental Technology GmbH

Friedberger Strasse 4

86453 Dasing

Firefighting water overflow between adjacent, through a

Wall separated rooms

The invention is used in buildings and systems where, in the event of a fire, there is a risk of the extinguishing water becoming contaminated with dangerous substances that should not enter the sewer system or watercourses. Therefore, in such systems or buildings, extinguishing water barriers are provided at gate openings, driveways and the like, which, if necessary, can be brought into a working position in which they essentially seal the opening in question in a watertight manner. Such extinguishing water barriers have a height of, for example, around 30 cm. Given the usually large floor area of such rooms, this is sufficient to collect a very considerable amount of extinguishing water.

Nevertheless, it must be taken into account that, for example, in the case of rooms with a relatively small floor area, or in the case of stubborn fires with a large amount of extinguishing water, the collection volume available on the floor of the room up to the height of the barrier threshold is not sufficient. Under no circumstances should the possibly contaminated extinguishing water overflow the extinguishing water barrier, as otherwise, despite the extinguishing water barrier, the sewer system or nearby bodies of water could become contaminated. It is therefore desirable that, when the available collection volume in a room is full, any further accumulating and possibly contaminated extinguishing water be directed into neighboring

Rooms that are of course also secured by fire extinguishing water barriers in the area of door or gate openings. Such fire extinguishing water transfer can only take place through a corresponding opening in a wall separating the adjacent rooms. However, it is important that the fire cannot spread through this transfer opening into the adjacent room, whereby the danger must be recognized that lighter, flammable and burning liquids can float on the extinguishing water or that burning plastic parts, for example Styrofoam parts, or the like can float on the extinguishing water and reach the adjacent room through the transfer opening with the overflowing extinguishing water and start another fire there if no precautions are taken.

The object of the invention is to create an extinguishing water overflow between adjacent rooms separated by a wall with a transfer opening running through this wall which allows extinguishing water to pass over but reliably prevents the fire from spreading.

This object is achieved according to the invention by the fire water overflow specified in the claims.

An embodiment of such an extinguishing water overflow is shown schematically in the attached drawings and is described in more detail below.

In the drawings shows:
30

Fig. 1 a cross section through the two

wall separating adjacent rooms and a fire water overflow leading through this wall, and

Fig. 2 a front view of the extinguishing

water overflow onto a wall

side seen.

Fig. 1 shows two adjacent rooms Rl and R2, which are separated from each other by a wall W. An extinguishing water overflow leads through the wall, consisting of an overflow pipe 10 built into the wall and leading through it with a horizontal pipe section 11 and two adjoining vertical pipe sections 12 on both sides of the wall W. The horizontal pipe section 11 runs at a small distance above the floor B of the adjacent rooms Rl and R2, and the vertical pipe sections 12, which are connected to the horizontal pipe section 11 on both sides of the wall W, extend upwards from the horizontal pipe section 11 and open out there at a height H that runs significantly above the uppermost wall area of the horizontal pipe section 11, but slightly below the height position of the upper edge of extinguishing water barriers (not shown), which protect the rooms in question at their doors and gates against the escape of contaminated extinguishing water.

Each of the vertical pipe sections 12 is covered by a hood which has a cover wall 21 and side walls 22 and, as shown in Fig. 2, surrounds the respective pipe section 12 on all sides (except the side facing the wall W) and is connected on all sides (except at the bottom) to the relevant side of the wall W or is attached to it with flanges 23.

Each hood 20 is open at the bottom and ends with the lower edges of its side walls 22 a certain distance D above the floor B of the relevant room R1 or R2. In addition, the side walls 22 are laterally spaced from the vertical pipe section 12, and the cover wall 21 is located at a distance above the outlet of the vertical pipe section 12.

If the area near the floor of one of the rooms, for example room Rl, is filled with extinguishing water when a fire has broken out in it, the extinguishing water

under the lower edge of the side walls 22 of the hood 20 into the hood 20 and rises inside it in the same way as outside the hood 20 until the height H is reached, at which the outlet of the vertical pipe section 12 is located. If further extinguishing water is produced, it flows through the open upper end of the relevant vertical pipe section 12 into it and through the horizontal pipe section 11 to the other side, the wall, rises there in the vertical pipe section 12 there until it exits at its upper open opening and runs inside the hood 20 there onto the floor of the adjacent room, here the room R2, and exits into the room under the lower edge of the side walls 22 of the hood 20 there.

In Fig. 1 of the drawings, on the left-hand side, i.e. in space Rl, an already accumulated firefighting water level LWS is shown, which is still below the upper opening edge of the relevant vertical pipe section 12, so that no water can overflow. From this illustration it is easy to see that neither burning liquids floating on the surface of the firefighting water, nor burning pieces of material floating on it, nor any flames or burning gases from space Rl can get into space R2 through the firefighting water overflow, because the area under the hood 20 and outside the hood 20 is filled with firefighting water due to the standing firefighting water. Firefighting water can only enter under the hood 20 in the area close to the ground, so that no floating liquids or pieces of material can get under the hood 20. In addition, the standing extinguishing water surrounding the vertical pipe section 12 forms an airtight seal so that no more gases or anything similar from the space R1 can get into the extinguishing water overflow.

If at the beginning of the extinguishing process, as long as the water on the floor of the room Rl is still below the lower edge of the hood 20, burning liquid or burning pieces of material get under the hood 20, these must be

necessarily extinguished long before the fire-fighting water level has reached a level at which a transfer into the fire-fighting water overflow can take place, and in addition, the supply of atmospheric oxygen would be blocked beforehand by the fire-fighting water rising above the lower edge of the hood 20, and finally, in its entire course (sections 12-11-12) of the overflow pipe 10, extinguishing would most likely take place due to the full filling with water, so that an extraordinarily high level of safety against the spread of fire is guaranteed.

It goes without saying that the cross-sectional shape of the overflow pipe 10, round, square or rectangular, is just as irrelevant as the fact whether the transition between the horizontal pipe section 11 and the vertical pipe sections 12 is in the form of a sharp right-angled corner or in the form of a round bottom.

A further increase in safety can be achieved by closing the upper opening ends of the vertical pipe sections 12 and/or the space between the lower edges of the hood 20 and the floor B with a sieve grid or the like (not shown).

Claims (5)

Augsburg, 17 March 1995 Application file: BL.3522 Applicant: Blobel Umwelttechnik GmbH, Dasing Protection claims 1. Firefighting water overflow between two rooms (Rl, R2) separated by a wall (W), consisting of an overflow channel (10) which has a channel section (11) running approximately horizontally through the wall (4) in the area close to the floor and a channel section (12) on each of the two sides of the wall which adjoins the horizontal channel section (11), runs upwards and opens out above the horizontal channel section, and a hood (20) arranged on each of the two sides of the wall (W) which encloses the upwardly running channel section (12) at the top and on all sides at a distance, which is open at the bottom or has an inlet located close to the floor. 2. Firefighting water overflow according to claim 1, characterized in that the overflow channel is formed by an overflow pipe (10) with a horizontal pipe section (11) installed in the wall (W) near the ground and running through it and approximately vertical pipe sections (12) adjoining it on both sides of the wall and opening out upwards. 3. Firefighting water overflow according to claim 1 or 2, characterized in that each hood (20) adjoins the relevant wall surface of the wall (W) with its top wall (21) and its side walls (22) and the lower edges of the side walls (22) are located at a small distance above the floor (B) of the relevant room (Rl, R2). 4. Extinguishing water overflow from a fire-endangered room into an adjacent room separated by a wall, with an overflow channel running through the wall, which has an approximately horizontal channel section running through the wall near the floor and a channel section adjoining it on the side of the wall facing the room at risk of fire, running upwards and opening out above the horizontal channel section, and a hood covering the upwardly running channel section at the top and on all sides, which is open at the bottom or has an inlet opening near the floor. 5. Firefighting water overflow according to one of claims 1 to 4, characterized in that the open upper end of the or each upwardly extending channel section (12) and/or the open lower end of the or each hood (20) or its inlet opening is closed with a sieve grid or the like.