Fire-watching device in a building.

(74) Prosecutor Civil Service. Gunnar 0. Reistad, Bryns Patentkontor A / S, Oslo.

(30) Priority requested

18.07.85, DE, no. 3525644.

(54) DESCRIPTION OF THE INVENTION DEVICE FOR FIRE MONITORING IN A BUILDING.

(57) Summary

A fire monitoring device in a building includes at least one lead for at least one conduit (2), in particular an electrical cable, in a wall opening in a building wall (1). The penetration forms a fire seal by means of two sealing bodies (4) which close the wall opening at both building wall sides, with sealing against the conduit (2) and the wall (3) in the wall opening, respectively. In this way, a wiring harness may be sealed in a fireproof manner between two fire section zones separated by the building wall (1). Inside the casing, at least one electrical temperature sensor (12.1-12.4) is provided, the electrical connection line (13) of a monitoring location used for recording the sensor signals is passed directly out of the casing and into the building wall (1) and runs in a fire protected manner in the building wall. . The sensors and their connecting lines (13) will therefore be protected against premature damage in the event of a fire. The conductor is inserted into the building wall (1) with its sensors and connection lines already in its manufacture.

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(56) Published publications None.

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Interpretation No. 166 306 (51) Int. Cl 'H 02 G 3/22

Correction - Correction

N (71) WERNER HAUFF

The above patent application has been transferred to:

R (71) HAUFF-TECHNIK GmbH &amp; Co. KG., IndenStegwiesen 18, DW-7922 Herbrechtingen, DE

52470 Λ.

7.05.91

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a fire monitoring device in a building having at least one throughput for at least one conduit, in particular an electrical cable, through a wall opening in a building wall, the enclosure having a fire seal with two sealing bodies sealing on both wall sides of the wall and wall opening respectively. , whereby the wiring harness is sealed between two fire section zones separated by the building wall in a fireproof manner.

Implementations of the aforementioned type belong to the state of the art which has not yet been published and are described, for example, in German patent applications P 34 19 352.9 and P 34 25 429.3. Such penetrations are installed in the wall already in the construction of the building wall, either as a whole or at least in that essential components are built into. In particular, there is a possibility of arranging the penetration so between the formwork walls of a concrete wall that the penetration after removal of the formwork will seal tightly against the wall rafts in the finished wall.

Otherwise, fire control devices are known in a building, in various embodiments. Common to these devices is usually that in suitable locations in the rooms to be monitored are temperature, smoke and / or gas sensors or the like providing electrical monitoring signals. These signals go through wires to a monitoring site and, in addition to the usual alarm signals, can also trigger and, if necessary, also control fire fighting devices or equipment, especially sprinkler systems and the like. The installation of such fire monitoring devices takes place at the earliest after the raw building has been erected, and is associated with considerable assembly work. A disadvantage is also that the wires between the sensors and the monitoring site either go only on the outside of the wall or just under the wall plaster, that is, even to a great extent will be exposed to a fire effect and therefore in the event of fire will be sensitive to damage. This also applies to the sensors.

The object of the invention is to provide a device of the type mentioned in the introduction, which device is designed to enable a particularly simple and cost-saving mounting of the device, so that the temperature is recorded at a particularly sensitive location in the event of fire, fire alarm, and that the device itself is, as a whole, as fire-proof as possible, so that it has a great fire resistance time and thus can give the sensors monitoring signals for a maximum long period of time and will even be able to deliver these signals to the monitoring site during the entire fire.

This is achieved according to the invention in that at least one electrical temperature sensor is provided within the casing and in that the electrical connection line between the temperature sensor and a monitoring location used for recording the sensor signals is passed directly from the interior of the casing and into the housing wall, with a fire protection process there.

The arrangement of the temperature sensor inside the conduit means that the temperature of the conduit or conduits can be detected to a particular degree. This temperature is a particularly delicate indicator of a fire, because a temperature increase of a fire heated wire somewhere in the line, especially when it is an electric cable, will immediately pass through the line, ie. that the wires represent particularly good heat conductors between the fire site and the temperature sensor, so that the sensor can thus react to a fire development at a very early stage. Furthermore, since the temperature sensor is located within the fire-protected conduit and the connection lines go directly from the conduit and to the monitoring site deep within the wall, an optimal long monitoring function is achieved in the event of fire, namely over a time which will be substantially equal to the fire resistance time of the conduit itself, while the connection lines will be virtually completely protected inside the building wall. In the event of a fire, sensors and connecting lines will thus be well protected from early destruction. Also important is that the new device according to the invention can be mounted and installed in a particularly simple manner. This is because the passageways with the sensors arranged therein and associated connection lines to the monitoring site can be inserted into the wall already during its manufacture. In other words, if it is a concrete wall, then the equipment can be put into the formwork space before the wall is cast, so that the connection lines will thus above all lie deep inside the finished house wall, a position that can not be achieved if the lines are to be stretched only after the wall is ready made. Otherwise, no special mounting or laying costs that you know from a retrofitting on the finished building wall arise.

It will be possible to place the temperature sensor in one of the sealing bodies, or to arrange a separate temperature sensor in each of the sealing bodies. The sensor will then have a heat conductive connection to the conduit via the sealing body, and the heat conduction bridge formed by the sealing body may become very short if the temperature sensor is applied as close as possible to the wall receptacle present in the sealing body for the conduit. Furthermore, it will be possible to have several temperature sensors for each sealing body and to arrange one of these temperature sensors on the outer end surface of the sealing body. This latter temperature sensor can then also react to the room temperature, i.e. to the room temperature in the building space facing the said outer end surface of the sealing body. In addition, the temperature sensor or one of several other temperature sensors, respectively, may be arranged in the space axially between the sealing bodies and radially between the conduit and the wall of the wall opening. In such an embodiment, the sensor can also sit directly on the cord and thus have direct heat contact with the cord.

Conveniently, a conduit is arranged for the connection lines in the building wall for receiving the connection links. This conduit opens directly into the casing. The conduit may be plastic and protect the connecting cables from direct contact with reinforcing elements in the building wall. In addition, the conduit may have an additional heat insulating protection function for the connecting conduits. Preferably, the conduit opens in the space between the sealing bodies, so that the connecting conduits extending out of the conduit can be easily guided to the various locations where the sensors are located in the passage. In the case of a passage with an opening pipe between the sealing bodies, the conduit conveniently opens in the wall of this opening pipe. The conduit can also serve to improve the fire protection of the conduit. In this connection, it is proposed according to the invention that the conduit is in communication with a container for a fire protection agent and that the fire protection agent can be brought into the passage through the conduit, possibly only after an activation in case of fire.

It is possible, within the scope of the invention, to provide additional sensors, such as gas sensors or smoke sensors, in carrying out, on the outer end surface of the sealing bodies, and to allow their connection lines to the monitoring site to enter the building wall in the same way as the temperature sensors connection lines.

The invention will be explained in more detail below with reference to the drawing which shows an embodiment of the invention.

The drawing shows a schematic section through a building wall with an insert therein, in perspective view.

In the drawing there is shown a building wall 1. In this building wall 1 there is a passage for a wire 2, here an electrical cable with three wire wires 2 '. The shown embodiment is intended only for a single wire 2, but within the scope of the invention it can of course also be designed and intended for multiple wires. In this case, the sealing bodies 4 will have several conduits adapted to the respective conduit cross sections. In all cases, the passage consists of an opening pipe 5 located in the wall opening and of the two sealing bodies which fill at the respective ends of the opening pipe fill the space between the conduit 2 and the wall 3 in the wall opening, and seal against the conduit 2 and the wall 3 in the wall opening. In addition, the casing comprises a casing frame 6, which forms part of the wall 3 in the wall opening and forms a pressure device for elastic compression of the assigned sealing body 4 in the wall opening. The wall 3 of the wall opening tapers from the outside of the building wall and towards the interior of the building wall in a cone-like manner. In this tapered portion of the wall opening, the sealing body 4 is axially clamped by means of a pressure ring 7 which can be screwed into the casing frame 6 inserted in the building wall 1. The orifice 5 is provided with a cavity wall and its cavity 8 is filled with the flame retardant1 indicated by the dot, which, upon heating in the event of fire, will react and emit θπ flame retardant protective gas. and the gap 9, these apertures initially being closed, i.e. being open first under the influence of the heat of fire. Also in the sealing bodies 4 and the casing frames 25, respectively in the pressure rings 7, cavities 10 are formed which open against the conduit uptake and against the sealing body 4, these cavities being also filled with a flame retardant. Thus, the passage forms a fire protection seal so that the conduit will be sealed between the two fire section zones separated by the building wall 1 in a fire-proof manner. For fire monitoring in these fire section zones, electrical temperature sensors 12.1, 12.2, 12.3, 12.4 are arranged inside the casing. The electrical connection lines between these temperature sensors and a sensor location used for recording the sensor signals, not shown in the drawing figure, are routed directly out of the passage and into the building wall 1 and extend deep inside the building wall. Both temper ature sensors 12.1-12.4 and their connection lines 13 will therefore be protected against fire in case of fire. At the monitoring site, the monitoring signals can be utilized in various ways, for example, for monitoring the heating temperature of the individual cable, for reporting a critical sealing body temperature, for controlling a fire fighting foam system, for initiating a warning siren, for controlling and activating a fire protection device. , for controlling a refrigerant supply, etc.

In the embodiment, the temperature sensors 12.1, 12.2, 12.3 are arranged in the two sealing bodies 4. One of these temperature sensors, namely the sensor 12.3 is located on the outer end surface of a sealing body, so that it preferably senses the room temperature outside the building wall 1. Further sensors 12.1 are located. in the cavity 10 of the sealing body 4, for monitoring the temperature of the flame retardant therein. A further temperature sensor 12.4 is arranged in the gap 9 axially between the sealing bodies and radially between the conduit 2 and the wall 3 of the wall opening. This sensor 12.4 can in particular sit directly on the conduit 2 and thus have direct heat contact with the conduit.

In the building wall 1 there is a conduit 14 for receiving the connecting conduits 13. This conduit 14 opens directly in the passage and is shown in the drawing cut off in the direction of the monitoring site, otherwise in the same way as the conduit 13. The orifice of the conduit 14 lies in the space 9 between the sealing bodies 4 , the conduit 14 passing through the orifice 5 in the region between the sealing bodies 4, and including through it also the cavity 8 of the orifice. Therefore, the connecting line extending from the mouth of the conduit 14 can be easily passed to the sensors 12.1 to 12.4 arranged at the various points in the passage. Furthermore, there is a possibility of connecting the conduit 14 with a container not shown in the drawing for a fire protection agent and

Ί Furthermore, such measures are taken that the fire protection means, depending on the conditions, only after an activation in the case of fire can pass through the conduit 14 and into the gap 9 in the passage, for example by blowing or pressing.

Further, in the exemplary embodiment, additional sensors 15, such as gas sensors or smoke sensors, are provided in the embodiment on the outer end faces of the sealing bodies. Their connection lines to the monitoring site go in the same way as those for the temperature sensors directly from the passage and into the building wall 1, in the embodiment, thus into the conduit 14.

The shown embodiment is placed together with conduit 14, sensors 12.1 - 12.4 and 15 and together with connecting conduits 13, for example between the formwork walls in a wall formwork arranged for the casting of a concrete wall. Also, the rudder frames 6 are laid in place, but without pressure rings 7. After the casting, the casing casing 6 will align with the outside of the building wall and the connecting conduits 13 will together with the conduit 14 lie deep inside the concrete wall 1. If, on one side of such a building wall 1, a fire occurs, then the heating of the conduit 2 will propagate through the conduit wires 2 'to reach the conduit, where the heating is sensed by the sensors 12.1 - 12.4. The long fire resistance time in the construction and in the building wall itself provides full or partial protection against damage to the sensors and connection lines in case of fire.