DE3103763A1 - Automatic fire extinguishing system for enclosed spaces - Google Patents

Abstract

Automatic fire extinguishing system for an enclosed space, in particular a machine room, having on an extinguishing agent container (3) a triggering device (4) which can be actuated pneumatically by means of at least one thermostat, the thermostat (9) being formed by a container (19) which is filled with a predetermined amount of liquefied gas, is closed off by a rupture disc (20) and is connected to the triggering device (4) via a controlling pipeline (8). In this system, the, if appropriate, pneumatically actuable adjusting means (14, 15) for switching off the machine (2), for triggering a signal etc., are connected to the triggering device (4). <IMAGE>

Description

Name: Automatic fire extinguishing system for

closed spaces

Description:

The invention relates to an automatic fire extinguishing device for closed rooms, in particular for machine rooms / the at least one extinguishing agent container, at least one extinguishing agent nozzle connected to it as well as a triggering device acting on the valve of the extinguishing agent container and at least one with the release device in operative connection thermostat.

Automatic fire extinguishing systems are particularly necessary for such machine rooms in which internal combustion engines are set up, so that combustible fuels are continuously introduced which, on the other hand, are not constantly under the control of the operating personnel. Of special An automatic fire extinguishing device for the engine compartment of a mine locomotive is important, as here next to it the protection of the machine itself also protection

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the environment must be guaranteed, for example to prevent an engine fire from spreading to the surrounding area in coal mining. Because of the special conditions In hard coal mining it is particularly necessary to use the fire extinguishing system as an autonomous one Train system, d. H. Regarding the energy supply for actuating the triggering means regardless of other energy sources. It is known as a release device for use with the mine locomotive to provide a weight that is held by a cable and a fusible link fuse, wherein the fusible link protection takes over the function of the thermostat. Such a system is maintenance-intensive and because of the dust pollution of the environment with regard to its functional reliability, since the necessary pulleys, guides for the release weight, etc. can corrode and thus the entire Arrangement can affect their effectiveness. Electric temperature sensors with electronic Triggering means require the arrangement of an additional electrical power supply, for example in the form a corresponding battery, which has to be continuously maintained and whose charge status has to be continuously monitored.

The invention is now based on the object of providing an automatic fire extinguishing device of the type indicated at the outset To create a species that is designed as an autonomous system,

remains functional and easy to maintain even with the greatest environmental pollution by dust, corrosion, etc. is.

This object is achieved according to the invention in that the triggering device is a piston-cylinder unit has, in the cylinder chamber opens a control pipeline and that a liquid gas tank is provided as a thermostat is, whose outlet opening is connected to the control pipeline and opposite this with a for rupture disc designed for a predetermined pressure is closed. Such an arrangement has a row of advantages. In this way, the liquid gas tank serving as a thermostat can be set to a certain response temperature be set, namely by a corresponding weighing of a gas liquefied under pressure, for example Carbon dioxide, the expansion of which is known in relation to temperature. As usually in the relevant Several thermostats are arranged distributed over the critical points, and can also be arranged accordingly by a room adjusted filling for each of these critical points a different response temperature given to the thermostat will. The rupture disc that closes the liquid gas container is designed in such a way that when it reaches a 5 certain gas pressure, which corresponds to a certain trigger temperature, breaks open and the liquid gas content releases. Now that the one with the desired liquid gas

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quantity and liquid gas container closed with a rupture disc is connected to the control pipeline the system is ready for operation. Because all connections between the thermostat and the release device are screwed tight are, moreover, the triggering device with the valve of the extinguishing agent container also under closure against the environment can be impaired by environmental influences, be it dust or moisture or the like. Do not occur. Another advantage of the invention The conception is that it is an autonomous automatic system, i. H. for the When opening the valve on the extinguishing agent container, no additional energy supply is required. Is the If the liquid gas container used by the thermostat is heated above the set temperature, the rupture disc will burst and the liquid gas released in this way is converted into the gas phase and actuates the piston of the release device, which in turn opens the valve of the extinguishing agent container so that the extinguishing agent can escape. There If the liquid gas converts into the gas phase very quickly after the bursting disc has burst, the release takes place practically without delay. Since the tax

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pipeline the pressure increases since the volume of the gas increases considerably during the transition from the liquid phase to the gas phase, the released gas also serves as an energy carrier to generate the force required to actuate the trigger.

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In an advantageous embodiment of the invention it is provided that at least one control pipe pneumatically triggered switch is connected to a signaling device. This makes it possible at the same time to trigger a signal when the extinguishing process is triggered, since the same means are used as the triggering means is as for the opening of the valve of the extinguishing agent container, namely the liquid gas expanding into the control pipeline.

In a preferred embodiment of the invention it is also provided that the control pipeline at least an additional propellant gas container with a manually releasable valve is connected and that at the connection point a non-return valve protecting the rupture disc between the liquid gas tank and the control pipeline is arranged. This arrangement makes it possible, in addition to automatic triggering when the temperature is exceeded triggering manually if the operating personnel have already determined that the fire has started before the temperature increase required to trigger the associated thermostat takes place is. Due to the arrangement of the non-return valve protecting the rupture disc on the liquid gas tank (thermostat) it is ensured that the rupture discs of the liquid gas containers serving as thermostats are triggered by hand not pressurized and so theirs

Maintain functionality.

In a preferred embodiment of the invention is for a machine room in which an internal combustion engine is set up, in particular provided for the engine compartment of a mine locomotive that the air intake duct Internal combustion engine is assigned a locking flap, which via an actuating linkage with a piston-cylinder unit is connected and that the cylinder space is connected to the control pipeline of the fire extinguishing device. This arrangement has the advantage that when the extinguishing process is triggered, be it automatically or manually, the air intake duct is immediately locked by the locking flap, so that the extinguishing agent is usually powdery cannot be sucked into the interior of the motor. The actuating means is expediently the locking flap simultaneously with the fuel supply device coupled to the internal combustion engine, so that the fuel supply at the same time when the air intake duct is closed is locked.

The invention is based on schematic drawings of a Embodiment explained in more detail. Show it:

Fig. 1 shows a fire extinguishing device for a

Engine compartment on a mine locomotive

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Fig. 2 a liquid gas thermostat, part

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Fig. 3 a triggering device for the extinguishing

medium container.

In Fig. 1, a mine locomotive is shown schematically, which according to the requirements at both ends has a driver's cab I and II. The engine compartment 1 is located between the two driver's cabs Diesel engine 2 is arranged with the usual additional units. To protect against fire, the locomotive comes with equipped with an automatic fire extinguishing device, which has an extinguishing agent container 3 in the driver's cab I. Of the The extinguishing agent container is usually designed as a propellant-gas-operated powder extinguisher. The extinguishing agent container is provided at its upper end with a release device 4, with the one described in more detail below Way, the deletion process can be triggered either manually or automatically. From the extinguishing agent container 3 leads an extinguishing agent line 5 into the engine compartment 1, connected to the one or more extinguishing agent nozzles 6, 7 that can cover those areas in the engine room with extinguishing agents in which a fire can occur can.

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A control pipe 8 is now led to the triggering device 4 of the extinguishing agent container 3, to which in the area of the engine compartment 1 one or more thermostats 9, 10 are connected, as well as the extinguishing agent nozzles 6, 7 are arranged in the areas where a fire is most likely to develop. The thermostats are essentially formed by a small container filled with a predetermined amount of liquid gas, its structure will be described in detail below. The control pipeline 8 extends into the driver's cab II continued and there via a manually operable Valve 11 connected to a propellant gas bottle 12.

To the triggering device 4 of the extinguishing agent container 3 a pipe 13 is connected, via which control cylinders 14 and 15 can be actuated. To the control cylinder 14, an optical and / or acoustic signal device 16, not designated in any more detail, is connected. A locking flap 17 through which the air intake duct 18 of the internal combustion engine is connected is connected to the control cylinder 15 2 can be fully completed. With the actuating linkage of the locking flap 17 can also (not shown here) a device can be connected by means of which the fuel supply to the engine 2 can be shut off. 25th

The thermostat 9 shown in Fig. 2 consists essentially of a small steel container 19, the

The opening is closed by a bursting disc 20 and which opens into the control pipeline 8. The entire arrangement is fastened to the intended location in the engine compartment via a bracket 21. The container is filled with a fixed amount of liquid gas by weight. Carbon dioxide or nitrogen is expediently used as the liquid gas. The amount of liquid gas to be filled into the container 19 depends on the trigger temperature which is provided for the respective location of the thermostat. The usual setting temperatures for the application described are between 54 ° C and 108 ⁰ C.

The triggering device 4 on the extinguishing agent container 3 consists essentially of a cylinder in which a Piston 22 is guided displaceably against the force of a spring 23. In the extinguishing agent container 3 is usual Way a propellant gas bottle 24 is arranged, the opening is closed by a membrane, the membrane can be pierced by a mandrel 25, so that the Propellant gas can escape from the propellant gas bottle 24. The piston 22 is connected to a piston rod 26 which extends in the direction of the mandrel 25, so that upon a pressure movement of the piston 22 downwards over the The piston rod 26 of the mandrel 25 penetrates the membrane, thus releasing the propellant gas and the transport of the extinguishing agent can be done in the usual way.

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A plunger 28, which is connected to a handle 29, protrudes in the axial direction into the cylinder space 27 is / so that the piston 22 can be pressed against the mandrel 25 by hand. The handle 29 is through a locking clip 30 locked.

The control pipeline 8 opens into the cylinder chamber 27, so that in the event of a pressure increase in the control pipeline the piston 22 is also depressed and the mandrel through the sealing membrane of the propellant gas container 24 pushes through.

The propellant gas emerging from the propellant gas bottle 24 is fed into the extinguishing agent container via a channel 31, which is a pipe continues, initiated in this. A pressure line 13 is derived from the channel 31, which, as shown in FIG 1 explains, leads to the actuating cylinders 14 and 15 of the signaling device 16 and the locking flap 17. The propellant gas for the extinguishing agent container is under a much higher pressure than it would in the event of a fire Expansion of the liquid gas can be achieved in the thermostat, so that here for the actuation of the cylinders 14 and greater forces are available. Since, however, only a small volume of gas is required to operate the cylinder 5, practically the full amount of propellant gas is available for the extinguishing process itself.

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In the event of fire, the following applies Functional sequence: If, for example, a fire breaks out in the area of the thermostat 10, the liquefied gas container will be 19 (Fig. 2) heated in the liquid gas tank 19 contained liquid gas expands so far that the associated rupture disc 20 bursts, so that also as a result of the sharp increase in temperature, the liquid gas converts into the gas phase very quickly and leads to a corresponding pressure increase in the control pipe 8. The pressure increase in the

Control pipeline 8, which continues into the cylinder chamber 27 of the triggering device 4 (Fig. 3) the piston 22 of the triggering device 4 is depressed and thus the propellant gas bottle 24 of the extinguishing agent container 3 open. On the one hand, the propellant gas enters the extinguishing agent container 3 and usually drives it powdery extinguishing agent via the extinguishing agent line to the extinguishing agent nozzles 6 and 7, through which the · possible Fire sources are covered with extinguishing agents. 20th

When the propellant gas emerges from the propellant gas bottle at the same time a pressure increase in the pipeline 13, so that the control cylinders 14 and 15 in the Closing senses are actuated. On the one hand, this triggers the signaling device that is used in a mine locomotive consists of a compressed air-actuated sound signal device for reasons of fire protection.

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About the lock cylinder 15, the locking flap 17 of the Air intake duct 18 of the engine 2 completed and the same early, not shown here, the fuel supply to the Engine shut off. Because some transport time is required for the extinguishing agent to exit the extinguishing agent nozzles can escape, on the other hand, the control cylinders 14, 15 immediately when the pressure in the pipeline increases 13 respond, the locking flap 17 is closed before extinguishing agent ever got into the engine compartment. This prevents the usually powdery extinguishing medium is sucked in via the intake line into the air ducts and the combustion chambers of the engine, so that after Extinguishing the fire the vehicle can be driven back to the location on its own to use the extinguishing system must be refilled, unless the engine has been put out of operation as a result of the fire.

In the control pipeline 8 are each before the thermostats 9 and 10 check valves 32 and in the one to the propellant gas tank 12 of the branch line 8 'leading to the manual release, a check valve 33 is provided. The check valves 32 protect the rupture disks of the thermostats 9, 10 in the event of the fire extinguishing device being actuated by hand in the driver's cab I or II. The check valve 33 increases the amount of liquid gas in the thermostat compressing gas volume to be accelerated reduced by the volume of the branch line 8 ', ho that in the .Brand-

fall over the liquid gas passing into the gas phase, a sufficient pressure increase to actuate the Piston 22 of the release device 4 is available.

The invention has been described above on the basis of a fire extinguishing device for the engine compartment of a mine locomotive described. The basic structure and the mode of operation are, however, for an automatically acting, stationary one Fire extinguishing device the same, so that the fire extinguishing device according to the invention also for safety of machine rooms in buildings, machine units enclosing protective housings or the like. Be used can. The same advantages also result in these applications, namely that via the "temperature sensor" of the thermostat is also required to operate the release device on the extinguishing agent container Forces are applied. In the present case, the "temperature sensor" is the one filled with liquid gas and liquefied gas containers 19 closed off by a rupture disk 20.

The pipeline 13 leading to the control cylinders 14, 15, which is acted upon by the propellant gas of the fire extinguisher in the exemplary embodiment, can also be connected to the control pipeline 8 if, for example, for the functions associated with the extinguishing process, e.g. B. the signaling, triggered only by a small push button

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for which only small gas volumes and low switching forces are required.

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Claims (4)

et. v Maxton · Maxton · Langmaack Patent Attorneys Patent Attorneys Maxton & Langmaack ■ Pterdmengesstr. SO - 5000 KOIn 51 Robert Brede Π895-1813) Alfred Maxton ar. <iiM3 m / ti) Applicant: BEDIA Alfred Maxton JQrgtn Langmaack Maschinenfabrik Dlplom-Ingenleure Verwaltungs-GmbH approved by the Bendenweg 103 European Patent Office 5000 Cologne si 5300 Bonn 1 Our sign Date 527 pg 811 02/03/81 Description: Automatic fire extinguishing device for closed rooms claims : 1. Automatic fire extinguishing system for closed Rooms, in particular for machine rooms, which have at least one extinguishing agent container, at least one with this connected extinguishing agent nozzle and a triggering device acting on the valve of the extinguishing agent container and at least one thermostat operatively connected to the trip device, thereby characterized in that the release device (4) has a piston-cylinder unit (22), in the cylinder space (27) of which a control pipe (8) opens and that a liquid gas container is used as a thermostat (9, 10) (19) is provided, the outlet opening Telephone: (0221) 380238 Telegram: Inventator Cologne Telex: 8883555 max d Postal check account Cologne (BLZ 37010050) Account no. 152251-500 Deutsche Bank AG Cologne (BLZ 37070060) Account No. 1236181 connected to the control pipe (8) and opposite this with a, designed for a predetermined burst pressure The bursting disc (20) is closed. 2. Fire extinguishing device according to claim 1, characterized in that the control pipeline (8) a pneumatically releasable actuating means for a signaling device (16) is connected. 3. Fire extinguishing device according to one of claims 1 or 2, characterized in that the Control pipeline (8) at least one additional propellant gas container with manually releasable valve (11) attached and that at the connection atelle between the liquid gas tank (19) and the control pipeline (8) a check valve (32) protecting the rupture disc (20) is arranged. 4. Fire extinguishing device according to one of claims 1 to 3 for a machine room in which an internal combustion engine is installed, in particular for the engine room a mine locomotive, characterized in that that the air intake duct (18) of the internal combustion engine (2) is assigned a locking flap (17), which is connected to a piston-cylinder unit (15) via an actuating linkage, the cylinder space of which via a Pipe (13) with the propellant gas bottle (24) of the extinguishing medium container (3) is connected.