EP1172779A2 - Pipeline with integrated fire surveillance system - Google Patents

Abstract

A pipe (20) with a fire monitoring device has a continuous detector arrangement which extends mainly in the longitudinal direction of the pipe, in which the detector arrangement has a number of metallic conductors. At least one of the metallic conductors has an insulating layer, which melts under the influence of heat from a fire and the contact of the conductor with the molten insulating layer generates a signal which is used to indicate a fire.

Description

The invention relates to a pipe with an integrated fire monitoring device. Pipes of this type, for example, gases, liquids or the like, the pipes being lighter, for example Flammability of the medium must be revised.

The acceptance of gas as a heating medium has increased over the past few years Private individuals lost a lot. A main cause of this is the fear of the Consumer facing the catastrophic damage, including an uncontrolled one Gas leakage in the event of fire. Therefore, you have been looking for a long time new, safer pipe installation systems.

Such pipe installation systems are already known in the prior art. One way to ensure the safety of a pipe installation system in the event of a fire increase is to prevent the piping from burning.

For example, WO 94/25791 discloses a tube with a fibrous Backing layer made with a curable resin, the refractory material has, is coated. This means that pipelines cannot prevent fire ignite.

US-A-5,562,957 and US-A-5,183,079 disclose fire protection tubes refractory layers.

US-A-5,329,972 in turn proposes fire protection by cooling the outer tube layer.

A disadvantage of such refractory pipe systems is that in the event of a fire the gas supply is not shut off, so that in the event of leakage the Gas lines can nevertheless lead to serious damage.

In the prior art there are still fire monitoring devices for For example, gas-carrying pipes are known, in which individual, locally arranged Detectors detect an emerging fire and then that Shut off the gas supply.

DE-A-196 00 369, for example, discloses a fire protection device for Isolation of the ventilation pipe in the event of fire using a Mass, consisting of a material that increases the volume when exposed to heat experiences, the mass is arranged so that the volume increase into the airway under lock and key.

DE-A-43 26 072 proposes a shut-off device through which the Closing force-inhibiting element is held in the open position, this Element has a predetermined breaking point, which consists of a material whose Melting temperature is set to a defined limit temperature. at If this temperature is reached or exceeded, the closing process is triggered, by melting the material in the predetermined breaking device and the pressure escapes in the predetermined breaking area. As a result, the closing force is effective acts directly or indirectly on the shut-off valve, so that a further gas supply is prevented.

DE-A-89 16 131.9 discloses a device for shutting off lines of temperature-sensitive media with one loaded by a spring Shut-off element with a linearly guided in a valve body Valve tappet is provided by a thermo sounder connection Support element is held. When a predetermined temperature is exceeded the free tappet end is released so that the spring is the shut-off element drives in the closed position.

DE-A-296 11 260 U1 discloses a fire monitoring device which via commercially available sensors such as pressure sensor, gas detector, Fire detector or motion detector a signal is generated, which for Viewing a fire can be used.

DE-A-43 16 584 C1 is a valve for shutting off a gas-carrying pipe. Here sensors such as temperature sensors, In the event of fire, gas and smoke detectors send a signal to auxiliary points that inform a control center about acoustic and / or optical signals, which controls and closes the valve.

DE-A-195 32 289 D1 discloses a shut-off valve, the valve closing cone is under the action of a spring element and a melting body is held in the open position. Under the influence of a fire generated heat melts the melting body, so that the valve closing cone moved into the closed position and thus shut off the shut-off valve.

DE-A-93 07 536 U1 proposes a device similar to that in the DE-A-43 16 584 C1 is disclosed, in which the shut-off valve is magnetic is controlled.

A disadvantage of such locally arranged detectors is that the There is a possibility that a fire will break out in a place that is not in is in the immediate vicinity of one of the detectors, so that the detectors are located Do not detect fire and therefore the shut-off valve to shut off the gas supply cannot operate.

An object of the invention is a fire monitoring device for pipes, especially for gas pipes, to create a fire detected reliably along the entire length of the tube and then the Shut off gas supply.

To achieve this object, the invention is a tube with a particular integrated fire monitoring proposed, the pipe being a Detector arrangement which extends continuously along the tube and which in the event of overheating, a signal to actuate a shut-off valve is generated.

Even if the pipe according to the invention is preferably a gas pipe Pipe is related to the fire monitoring device in the following with a gas pipe, it should be clear that the Fire monitoring device also for pipes, the liquid media or the like lead, can be used.

According to the invention, the pipe is monitored inside the building, so that in the event of fire the gas supply in the fire area is stopped. By Shutting off the gas supply, it is also possible to use non-refractory pipes For example, use plastic and plastic-metal composite pipes that are easy to install. The individual consumers are of one Distributor, which is arranged behind the gas quantity consumption meter, respectively supplied with its own lines. This has the advantage that there are no difficult to seal Connectors such as T-pieces can be used have to. The gas-carrying pipe comprises a fire monitoring device, when there is a rise in temperature on a piece of pipe between the manifold and triggers a command to the consumer, the gas supply for the whole Lock strand. This can be done by using the command below arranged solenoid valve is controlled. The temperature, at which the command is triggered should be set so that only in one In the event of a fire in the building, the gas supply is shut off.

According to a first variant of the invention, the fire monitoring device comprises a continuous detector array that is essentially extends in the longitudinal direction of the tube, the detector arrangement Has a plurality of current-carrying metallic conductors, at least one of the metallic conductors has an insulating layer which, under the influence of the in the event of a fire, the heat melts and the touch of the "Bare" conductor with melted insulation layer to produce one Fire-indicating signal can be used.

The metallic conductors are now on the installation of the pipeline on Tube attached; It is easier to include the ladder with the pipe production to "connect" the pipe. When installing the pipe be in the area of the fitting to be placed removes the metallic conductors from the pipe. On the A measuring device with the necessary control is connected on the distributor side; on the other hand, the metallic conductors are insulated. Now kick a fire causes a temperature increase on the pipe surface, so melts the insulation of the metallic conductors. It comes to the touch of the "bare", current-carrying wires, so that a short circuit is generated. This short circuit is recorded electrically, evaluated and leads to the actuation of the solenoid valve that shuts off the gas supply.

In an advantageous development of the invention, the insulating layer of the metallic Conduct a melting point in the range of 100 ° C.

Plastic materials are preferably used as the material for the insulating layer or paints used.

Furthermore, the metallic conductors are preferably twisted such that they are mechanically clamped together. This ensures that the metallic conductor is after the insulation layer has melted touch. By using different metals for the metallic conductors the mechanical tensioning of the twisted conductors can additionally be increased, which further increases security.

In an advantageous development of the invention, the metallic conductors also be arranged in the longitudinal direction of the tube such that they are in the tube integrated and / or helical on the diameter of the tube are arranged.

The tube preferably has a plastic material, a metallic material or a plastic / metal composite material.

According to a second variant of the invention, the fire monitoring device comprises a continuous detector array that is essentially extends in the longitudinal direction of the tube. The detector arrangement comprises at least one current-carrying, metallic conductor, which is an electrical Resistance that changes when exposed to heat, wherein the change in electrical resistance to create a fire indicating signal is applicable. When installing the fitting areas exposed to be able to attach the fitting. On the distributor side the measuring device sits with the appropriate control. The device will now adjusted, that means there is a certain resistance R for the installed Lead before. In the event of a fire, the temperature rises Change in line resistance. The size of this change is now recorded using the measuring device; if the setpoint is exceeded the solenoid valve is activated and closed.

According to the invention, the resistance of the at least one metallic Conductor either increase significantly or significantly with increasing temperature lose weight.

The metallic conductor is preferably attached to the tube. He can also in the tube integrated or helical on the diameter of the Pipe can be arranged.

The tube preferably comprises a plastic material, a metallic material or a plastic / metal composite material.

In a third variant, the fire monitoring device comprises one continuous detector arrangement, which is essentially in the longitudinal direction of the tube extends. The detector arrangement has at least one metallic one Conductor through which a continuous current flows. The metallic one Conductor comprises a material that is influenced by a fire Heat melts, causing the conductor to be cut, causing the cut of the conductor for generating a signal indicating a fire is applicable. When installing the gas pipe, the measuring device is connected. A current normally flows. In the event of a fire, it melts under train standing wire and the current flow is interrupted. This interruption of the Current flow forms a signal through which the solenoid valve is controlled and is closed.

The wire is preferably made of soft solder.

The wire is preferably integrated in the tube or helical arranged on the diameter of the tube.

The tube preferably comprises a plastic material, a metallic material or a plastic / metal composite material.

Fig. 1

eine Vorderansicht einer Brandüberwachungsvorrichtung gemäß einer ersten Ausführungsform der Erfindung,

Fig. 2

eine Vorderansicht einer Brandüberwachungsvorrichtung gemäß einer zweiten Ausführungsform der Erfindung,

Fig. 3

eine Vorderansicht einer Gasleitung mit einer Brandüberwachungsvorrichtung gemäß einer dritten Ausführungsform der Erfindung,

Fig. 4

eine Vorderansicht einer Gasleitung mit einer Brandüberwachungsvorrichtung gemäß einer vierten Ausführungsform der Erfindung, und

Fig. 5

eine Vorderansicht einer Gasleitung mit einer Brandüberwachungsvorrichtung gemäß einer der Ausführungsformen, die in den Fign. 1 - 4 dargestellt ist.

The pipe according to the invention for a gas line with a fire monitoring device is explained in more detail below with reference to the drawing and in connection with some applications. In detail show:

Fig. 1

2 shows a front view of a fire monitoring device according to a first embodiment of the invention,

Fig. 2

2 shows a front view of a fire monitoring device according to a second embodiment of the invention,

Fig. 3

2 shows a front view of a gas line with a fire monitoring device according to a third embodiment of the invention,

Fig. 4

a front view of a gas line with a fire monitoring device according to a fourth embodiment of the invention, and

Fig. 5

a front view of a gas line with a fire monitoring device according to one of the embodiments shown in FIGS. 1-4 is shown.

1 shows a fire monitoring device according to a first embodiment the invention. Two wires 10 and 12 are twisted together in such a way that they are "mechanically" clamped together. For the wires 10 and 12 are copper wires through which current flows Lacquer layer are insulated. The paint layer has a low melting point to, preferably 100 ° C. In the event of a fire, the wires 10 and 12 are heated and when a target temperature is reached, preferably 100 ° C, the melt Paint insulation layers, so that the bare, current-carrying Can touch wires 10 and 12, creating a short circuit. This Short circuit serves as a signal for the shut-off valve of the gas supply.

The wire 12 may also have a material that is a smaller linear Has thermal expansion than copper, such as tungsten. In the Choice of different materials for the wires 10 and 12 arises when heated the wires 10 and 12 an additional mechanical bracing, so that it is ensured that the wires touch each other as soon as the enamel insulation layer has melted.

Fig. 2 shows a second embodiment of the fire monitoring device according to the invention with wires 14, 16 and 18, which are so together are twisted that they are mechanically clamped together. With the wires 14 and 16 are copper wires through which current flows Lacquer insulation layer with a low melting point, preferably 100 ° C. at the wire 18 is a copper wire through which current flows has a coating insulation layer with a high melting point. The current-carrying Wire 18 serves to protect against manipulation. If the wire 18 should be cut, the interruption of the current flow triggers an error message off so that the surveillance personnel can see the Check fire monitoring device. In the event of a fire, the Wires 14, 16 and 18 heated, preferably when reaching a target temperature 100 ° C, the enamel insulation layers of the wires 14 and 16 melt, so that the bare, current-carrying copper wires 14 and 16 together come into contact and create a short circuit that acts as a signal used to close the gas supply shut-off valve.

The wire 16 can also, as has already been described with reference to FIG. 1, consist of a material that has a lower linear thermal expansion has as copper, so that an additional mechanical bracing in In case of an increase in temperature is generated.

Fig. 3 shows a gas line 20, in the longitudinal direction of which a current flows Semiconductor cable 22 is arranged. The semiconductor cable 22 has one electrical resistance, which drops sharply with increasing temperature. in the In the event of a fire, the temperature rises and changes the Resistance of the semiconductor cable 22, so that once a predetermined setpoint is exceeded, the shut-off valve of the gas supply is closed and thus the gas supply is interrupted.

It is of course also possible to choose a material for the semiconductor 22, whose electrical resistance increases sharply with increasing temperature. The only decisive factor is a significant change in the electrical resistance of the semiconductor 22 due to a corresponding temperature increase of a fire.

Fig. 4 shows a gas line 20, in the longitudinal direction of which a current flows Wire 24 helically along the diameter of gas line 20 is arranged. The wire 24 comprises a very low material Melting point, such as soft solder. In the event of a fire, the current-carrying melts Wire 24 through the heating and is severed so that the current flow is interrupted. This interruption in the flow of electricity serves as a signal to actuate the gas supply shut-off valve.

5 shows a gas line 20 with a fire monitoring device 26 according to one of the embodiments shown in Figs. 1-4 has been described. The fire monitoring device 26 is not on the gas line 20 here arranged, but integrated into this.

Claims (19)

Pipe (20) with a fire monitoring device, with a continuous detector arrangement which extends essentially in the longitudinal direction of the tube (20), the detector arrangement having a plurality of metallic conductors (10, 12; 14, 16), wherein at least one of the metallic conductors has an insulating layer that melts under the influence of the heat generated during a fire and wherein the contact of the conductors when the insulating layer is melted can be used to generate a signal indicating a fire. Pipe (20) with a fire monitoring device according to claim 1, characterized in that the insulating layer has a melting point which is in the range of 100 ° C. Pipe (20) with a fire monitoring device according to one of the preceding claims, characterized in that the insulating layer has a plastic material. Pipe (20) with a fire monitoring device according to one of the preceding claims, characterized in that the insulating layer has a lacquer. Pipe (20) with a fire monitoring device according to one of the preceding claims, characterized in that the metallic conductors (10, 12; 14, 16) are twisted in such a way that they are mechanically clamped together. Pipe (20) with a fire monitoring device according to claim 5, characterized in that the metallic conductors (10, 12; 14, 16) have a different mechanical strength due to the materials used in each case. Pipe (20) with a fire monitoring device according to one of the preceding claims, characterized in that, together with the metallic conductors (14, 16), a further current-carrying conductor (18) with an insulating layer with a high melting point is arranged, with the current-carrying conductor ( 18) an error message is output in the form of a signal. Pipe (20) with a fire monitoring device according to claim 7, characterized in that the current-carrying conductor (18) comprises copper. Pipe (20) with a fire monitoring device according to claim 7 or 8, characterized in that the insulating layer of the current-carrying conductor (18) has a lacquer. Pipe (20) with a fire monitoring device, with a continuous detector arrangement which extends essentially in the longitudinal direction of the tube (20), the detector arrangement having at least one metallic conductor (22), wherein the metallic conductor (22) has an electrical resistance that changes when exposed to heat and the change in electrical resistance being applicable to generating a fire indicating signal. Pipe (20) with a fire monitoring device according to claim 10, characterized in that the resistance increases significantly with increasing temperature. Pipe (20) with a fire monitoring device according to claim 10, characterized in that the resistance decreases significantly with increasing temperature. Pipe (20) with a fire monitoring device, with a continuous detector arrangement which extends essentially in the longitudinal direction of the tube (20), the detector arrangement having at least one metallic conductor (24), wherein a current flows continuously through the metallic conductor (24), wherein the metallic conductor (24) comprises a material that melts under the influence of the heat generated by a fire, whereby the conductor (24) is cut, and the severing of the conductor (24) being applicable to generating a fire indicating signal. Pipe (20) with a fire monitoring device according to claim 13, characterized in that the metallic conductor (24) comprises soft solder. Pipe (20) with a fire monitoring device according to one of the preceding claims, characterized in that the metallic conductor or conductors (10, 12; 14, 16, 18; 22; 24) are attached to the pipe (20). Pipe (20) with a fire monitoring device according to one of the preceding claims, characterized in that the metallic conductor or conductors (10, 12; 14, 16, 18; 22; 24; 26) are integrated in the pipe (20). Pipe (20) with a fire monitoring device according to one of the preceding claims, characterized in that the metallic conductor or conductors (10, 12; 14, 16, 18; 22; 24; 26) are arranged helically on the diameter of the pipe (20) are. Pipe (20) with a fire monitoring device according to one of the preceding claims, characterized in that the pipe (20) comprises a plastic material, a metallic material or a plastic / metal composite material. Pipe (20) with a fire monitoring device according to one of the preceding claims, characterized in that the pipe (20) is a gas line.

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