JP2005530526A - Automatic foam fire extinguishing device specially used as a stationary installation for extinguishing large hydrocarbon storage tanks - Google Patents

Abstract

The automatic foam extinguishing apparatus according to the present invention has a tank, a means for spreading foam extinguishing agent, a pipe and a main valve installed in the pipe, and a detector, whose characteristics are that the tank is a foam-forming compound. A foam tank that stores an over-compressed mixture of water and a foam-forming and driving gas that is soluble or emulsifiable in a solution of foam-forming compound and water, the tank creating a gas space (16) The expansion nozzle (20, 22) is a means for expanding the foam extinguishing device, the detector of which is arranged to detect combustion independently of each other in an essentially similar manner The main valve (18), which is composed of pneumatic detectors (31, 32; 35, 36) and is connected to the pipe (17) connecting the foam tank (15) to the expansion nozzle (20, 22), is pneumatic. Type pneumatic detectors, where two pneumatic detectors monitoring the same area 31, 32; 35, 36) are in a common control arrangement with each other and are in direct or indirect pneumatic control connection with the main valve (18), and when a fire is detected, a start control signal is sent to the main valve (18 ).

Description

  The object of the present invention is an automatic foam digester, which, by virtue of its construction, requires no energy or water from an external source to start and maintain its operation, and secondly, the device It is protected against false start-up and can therefore be used in particular as a stationary installation device for extinguishing fire tanks of flammable liquids, in particular liquid hydrocarbons. The fire extinguishing apparatus according to the present invention includes a tank, means for spreading foam extinguishing agent, piping, a main valve installed in the piping, and a detector.

  It is well known that when a liquid hydrocarbon storage tank is ignited, there is only a very short time from ignition to combustion of the liquid surface stored in the tank, for example, in the case of gasoline only a few seconds. In addition, as the fire progresses, a significant amount, for example in the case of gasoline, a 7 mm thick layer burns from the surface. In order to avoid serious environmental pollution and financial loss due to the combustion of large quantities of hydrocarbons, it is desirable that fire extinguishing systems installed in storage tanks should start operating automatically and instantaneously, which is why fires are highly reliable. Must be detected, the foam must be supplied immediately, and the foam must be instantaneously jetted onto the combustion surface.

  Known foam extinguishers installed in liquid hydrocarbon storage tanks are tanks for storing foam-forming compound concentrates, individual fire fighting water networks or individual water tanks for obtaining water, to produce foam solutions Mixers, means for spreading foam, piping networks connecting these elements, one or several pumps adapted to deliver water and / or foam solutions, and stop valves in the piping Composed. In addition, the apparatus includes an electric engine or combustion engine that drives a pump, an external power source for supplying power to these engines, and a detection that places the apparatus in operation and is located at a predetermined location in the storage tank. Consists of containers. The detector used may be a mechanical, pneumatic, hydraulic detector, electrical or electronic type. Pneumatic detectors are of the plastic pipe type or sprinkler head type and are filled with an overcompressed gas, in particular air, and in most cases are equipped with a pressure switch.

  Prior art fire extinguishing devices with pneumatic detectors expand in the event of a fire due to the heat produced by the gas in the detector and increase its pressure or pressure due to the destruction of the detector The pressure switch sends an electrical signal as a result of the pressure change, and the electrical signal or the electrical signal derived from this signal turns on the pump and thus starts the outflow of water in this way. Start device operation. The effluent water is first mixed with the foam-forming compound to form a foam solution, and the foam solution flowing through the piping network is mixed with air in the foam generator to form a foam digester, and thus The resulting ready foam digester will obtain its final volume and will be delivered to the liquid surface burning in the tank through the required cross-section dispenser or through the foam chamber. Is done.

  These devices may fail if the detector pressure changes due to failure, for example, damage during maintenance, incorrect installation, material defects, aging, or overheating due to sunshine. It has the flaw of sending a signal and starting the fire extinguishing device as if a fire had occurred. The fire extinguisher, automatically started by a detector false signal, permanently persists the foam digester in the storage tank until it is turned off, ie, the signal sent by the detector is found to be in error. Produce and spread. This foam is virtually wasted and is a significant loss in itself. In addition, there are additional losses such as energy consumption, water consumption, and refilling with foam-forming compounds of foam extinguishers. Also, the foam must be removed from the surface of the liquid hydrocarbon as a contaminant, and the storage tank must be removed from production for inspection and / or restoration time, which is a significant loss. Another deficiency is that it makes the fire fighting team uselessly alert, which also costs a certain amount of money.

  Another deficiency of these devices is that there is a need for an external power source and a pump operated using this energy source for their operation, and therefore the operability of the device is dependent on the energy source. Depending on the actual condition of the pump, it is also a potential source of error.

  In known structures, especially by building and maintaining network parts for fire fighting purposes, for example in addition to separate fire fighting water networks or separate fire fighting water tanks, the fire extinguishing device can be operated exclusively. Efforts have been made to eliminate this deficiency by building and maintaining the separate electrical network used and / or keeping spare pumps and the like ready for use. Building and maintaining a separate energy source is an expensive investment and it does not provide such operational reliability that should be required in the case of an automatic fire extinguisher. Even if there is a separate electrical network, for example, in the case of an explosion that normally accompanies a tank fire, or in the case of a fire in a conduit, a fire extinguisher at a critical moment just because of an electrical network failure May be unusable or delay the start of fire extinguishing system.

  Due to the above disadvantages, it was necessary to develop an automatic foam fire extinguishing device that can be trusted for its start of operation, has high operating reliability, and has a structure that prevents erroneous start of the fire extinguishing device. .

  The basic concept of the present invention is the above described by the foam extinguishing device, which can easily store the energy necessary to produce the foam digester and to start and maintain the operation of the foam extinguishing device. The disadvantage is that it can be removed. Thus, the basic concept of the present invention is to generate a foam digester and, in addition to the gaseous medium used to act as a constituent of the foam digester, the detector must be selected of the pneumatic type, The control means must be of the pneumatic type and the energy required to produce and deliver the foam digester is in the form of an overcompressed incombustible gaseous medium in the device acting as an energy storage system. It must be stored ready for use.

  Therefore, the automatic foam extinguishing apparatus according to the present invention, which can be used especially as a stationary installation type apparatus for extinguishing a liquid hydrocarbon storage tank, includes a tank, a means for spreading foam extinguishing agent, piping, and the piping. It has a main valve and a detector installed. The fire-extinguishing apparatus is characterized in that the tank is a foam tank that stores foam-forming and driving gas bubbles that are soluble or emulsifiable in a foam-forming compound, water, and a solution of the foam-forming compound and water. The tank has a gas space, the means for expanding the foam fire extinguishing device is an expansion nozzle, and the detector is at least arranged to detect combustion independently of each other in a basically similar manner It consists of two pneumatic detectors, and the main valve installed in the pipe connecting the foam tank with the expansion nozzle is of the pneumatic type, where there are two pneumatic detectors monitoring the same area The devices are in a common control arrangement with each other and they are in direct or indirect pneumatic control connection with the main valve to provide a start control signal to the main valve when a fire is detected.

  In one preferred embodiment of the above apparatus, the foam generating gas and the driving gas are a single gas, preferably carbon dioxide.

  In another preferred embodiment of the above apparatus, the foam generating gas and the driving gas are a mixture of gases, preferably a mixture containing carbon dioxide.

  The volume of the foam tank of the fire extinguishing apparatus according to the present invention is the addition of an over-compressed foam generating and driving gas or gas mixture dissolved or emulsified to the foam-forming compound and water corresponding to the amount of foam extinguisher produced. Determined by the amount. The tank is designed to be chemically durable against foam-forming compounds and foam-generating and driving gases, and the tank is pressure resistant. Inside the tank is a gas space whose volume is at least 8% of the volume of the tank, and in the normal state of the tank, only gas phase material is present in the gas space. The tank is equipped with appropriately arranged injection means for supplying the foam digester component-pipe stub, valve, etc., which also includes a pressure gauge.

  The expansion nozzle used to spread the foam digester may be of conventional design or it may be a so-called continuous linear nozzle with or without a pressure compensation chamber or pressure compensation tank.

  The piping connecting the foam tank to the expansion nozzle is made of the required strength material having a diameter selected according to the amount of foam delivered under the required pressure, and the piping is part of the foam tank Where the liquid phase is stored.

  The main valve arranged in the pipe is preferably a two-position router that can be controlled pneumatically, or a butterfly gate controlled by a pneumatically acting working cylinder.

  The structure of the pneumatic detector of the fire extinguishing device according to the invention is known per se. Pneumatic detectors are filled with a gaseous medium having a pressure greater than atmospheric pressure, such as air, and are compatible with the drive and / or bubble generating gas. When subjected to heat, the sensing element of the detector is deformed, causing the internal gas pressure to drop rapidly to atmospheric pressure. Such a pneumatic detector may be a plastic pipe linear detector that breaks a plastic pipe filled with overcompressed gas under heat, or a metal pipe filled with overcompressed gas It may be of the type with a sprinkler head mounted on a metal pipe, in which the sensing element of one or several sprinkler heads mounted on it deforms under heat.

  In one preferred embodiment of the fire extinguisher, two pneumatic detectors arranged to detect combustion independently of each other in a basically similar manner are provided inside the tank wall. Around the periphery of the tank so as to be fixed at a predetermined distance from each other. In this way, the two detectors are in essentially the same position relative to the liquid surface in the tank, so that the detector can simultaneously detect combustion of the liquid surface at substantially the same location. It is possible, and the detectors can provide fire-related signals individually and independently of each other.

  In the fire extinguishing device according to the invention, the common control arrangement of two pneumatic detectors monitoring the same area and their pneumatic control connection with their main valve can be achieved in different ways. It is possible to construct a logical AND connection between two detectors, or two at the input of a pneumatic logic AND element where the output signal of the pneumatic logic AND element is the signal that controls the main valve. This can be achieved by either connecting two or more detectors.

  In a very advantageous embodiment of a fire extinguisher with a pneumatic control unit, the pneumatic detector is connected to the input of the pneumatic control unit and the control input of the main valve is connected to the output of the pneumatic control unit The control unit is configured such that when the signal indicating ignition reaches its input connected to two pneumatic detectors monitoring the same area, the control unit is connected to the main valve at its output. Is configured to provide a control signal with a command to release the.

  In a preferred embodiment of the fire extinguishing device according to the invention developed for monitoring several areas (for example in the case of a storage tank with a guard ring, these areas are the inner area of the tank, and the guard ring and the tank The pneumatic control unit has several pneumatic logic AND elements and one pneumatic logic OR element connected to the output of the logic AND element. The input of the pneumatic logic and element-suitably by molding element-consists of the input of a pneumatic control unit containing a detector that monitors the same area, for example the internal area of the tank or the area of the guard ring, On the other hand, the output of the pneumatic logic OR element—suitably by the shaping element—is composed of the output of a pneumatic control unit connected to the control input of the main valve.

  In one embodiment of the fire extinguishing device according to the invention, the pneumatic detector and the pneumatic power supply of the pneumatic element are the gas space of the foam tank.

  In another preferred embodiment, the pneumatic detector and pneumatic element have a pneumatic power supply unit such as a gas cylinder combined with a pressure stabilizer, which may be a separate pneumatic power supply unit, or It may be connected in parallel with the gas space of the foam tank. The working substance of the power supply part may be a bubble generating gas and / or a driving gas or a mixture of gases containing these, or some inert gas such as nitrogen.

  The essence of the automatic foam extinguishing device according to the present invention will be described in more detail with reference to the following attached schematic drawings by presenting a preferred embodiment:

  FIG. 1 is a diagram showing a schematic structure of a fire extinguisher installed as a fixed installation type on a storage tank provided with a protective ring, and also shows a schematic diagram of its operating pneumatic system.

  FIG. 1 is a diagram showing a schematic structure of a fire extinguishing apparatus. In this embodiment, the fire extinguishing apparatus is installed on a gasoline storage tank 10 constructed with a protection ring 12. The tank having the protection ring has two monitor areas in this embodiment, one is an inner area of the storage tank 10 and the other is an area between the storage tank 10 and the protection ring 12.

  The fire extinguisher has a foam tank 15, expansion nozzles 20 and 22, and a foam pipe 17 connecting the foam tank 15 with the expansion nozzles 20 and 22, and the foam pipe 17 is connected to a lower space of the foam tank 15. . There is a pneumatic two-way two-way router inserted into the foam pipe 17 and acts as the main valve 18.

  The expansion nozzle 20 is annularly mounted on the inner wall of the storage tank 10 close to its upper peripheral edge so that it can be seen in the broken section of the storage tank 10 and its groove is towards the tank wall. Is directed to. Similarly, the expansion nozzle 22 is annularly mounted on the inner wall adjacent to the upper peripheral edge of the protective ring 12 of the storage tank 10, as seen in the broken cross section of the expansion nozzle 22 in the broken cross section of the protective ring 12. Moreover, the groove 23 is directed towards the wall.

  The fire extinguisher has two plastic pipe type pneumatic detectors 31 and 32, which are expanded nozzles in the internal space of the storage tank 10 and in the vicinity of the peripheral edge thereof. It is attached below 20 and moves around the side surface of the wall of the tank 10 up and down with a predetermined distance. The fire extinguisher further has two plastic pipe type pneumatic detectors 35 and 36, which are close to the peripheral edge of the inner space of the protective ring 12, Mounted below the expansion nozzle 22 and moved up and down around each other around the inside of the wall, it can be seen in the above figure in a form broken to a broken section of the protective ring 12 it can.

  Thus, the two detectors 31 and 32 in the storage tank 10 are in essentially the same position with respect to the liquid surface, so that the detectors can burn the liquid surface in substantially the same way. The detectors can provide signals relating to combustion individually and independently of each other. Similarly, the two detectors 35 and 36 in the guard ring 12 are in essentially the same position relative to the liquid surface, so that the detector detects the combustion of the liquid surface in substantially the same manner. The detector can provide signals relating to combustion individually and independently of each other.

  The fire extinguisher has a pneumatic control unit 40, and the pneumatic detectors 31, 32 and 35, 36 pass through the individual pneumatic conduits 33, 34 and 37, 38 to the input of the pneumatic control unit 40. Connected to. The output of the pneumatic control unit 40 is connected through a pneumatic control conduit 45 to the control input of a pneumatic two-way two-way router that acts as the main valve 18.

  The pneumatic control unit 40 is connected to two pneumatic elements 61 and 63 that perform logical AND operations, and one pneumatic element 65 that is connected to the outputs of the two pneumatic elements 61 and 63 to perform logical OR operations. Have Pneumatic detectors 31 and 32 located in the interior space of the storage tank 10 are connected to the input of the first pneumatic element 61 via conduits 33 and 34 through signal forming elements 56 and 57. Pneumatic detectors 35 and 36 located in the interior space of the guard ring 12 are connected to the input of the second pneumatic element 63 via conduits 37 and 38 through signal forming elements 58 and 59. The output of the pneumatic element 65 passes through the signal forming element 67 and forms the output of the pneumatic control unit 40.

  The pneumatic power supply unit of the fire extinguishing apparatus is a gas space 16 of the foam tank 15. Connected to the supply input of a pneumatic two-way two-way router that acts as

  Each input of the pneumatic control unit 40 of the fire extinguisher is connected to its supply input through a separate pneumatic choke element 51, 52, 53 and 54.

  Prior to activation of the fire extinguishing device, the foam tank 15 is connected through its appropriate opening with an aqueous solution of foam-forming compound and an over-compressed foam-forming gas and driving gas that is soluble and / or emulsifiable in the solution. The main valve 18, and another safety valve, not shown, which is located in the conduit, is preferably filled with carbon dioxide which is suitable for both purposes, and is in a closed position. Furthermore, from the gas space 16 of the foam tank 15, through the supply conduit 41 and the pneumatic control unit 40, the plastic pipe type pneumatic detectors 31, 32, 35 and 36 are filled with pressurized gas, and Through the supply conduit 43 and the pneumatic control unit 40, the main valve 18 is set to a pre-pressurized closed position. As a result, the device is ready for operation.

  If the pressure at either the pneumatic detectors 31, 32 on the storage tank 10 or both the pneumatic detectors 35, 36 on the guard ring 12 changes in the sense that it indicates a fire, In this embodiment, the detector plastic tube cracks due to overheating, and thus the detector pressure drops rapidly to atmospheric pressure.

  The pressure suddenly dropped to atmospheric pressure is connected to the input of the signal forming elements 56 and 57 and / or 58 and 59 connected to the corresponding inputs of the pneumatic control unit 40 by conduits 33 and 34 and / or 37 and 38. To be told. As a result, the output signals of both one or a set of signal forming elements change. In the same sense, as a result of the simultaneous change of the two input signals, it is connected to the pneumatic element 61 connected to the output of the signal forming elements 56 and 57 and / or to the output of the signal forming elements 58 and 59. The pneumatic element 63 sends an output signal indicating a fire to one or both inputs of the pneumatic element 65. As a result, through the pneumatic control conduit 45 connected to the output of the pneumatic control unit 40 in which the signal forming element 67 is inserted, the pneumatic element 65 acts as a pneumatic second position acting as the main valve 18 to the open position. Configure a two-way router.

  In the open position of the main valve 18, excessive pressure in the foam tank 15 releases a compressed foam digester composed of the foam-forming compound and water and a mixture of foam-forming gas dissolved in the water from the foam tank 15. And through the foam line 17, the compressed foam digester enters the expansion nozzles 20 and / or 22. When the compressed foam digester passes through the grooves of the expansion nozzles 20, 22 and is released to atmospheric pressure in the interior space of the storage tank 10 and / or the guard ring 12, it is dissolved in the solution and overcompressed. The foam generating gas expands the foam, which takes a volume corresponding to atmospheric pressure, and in this way the foam solution is converted into a foam stream. Thus, the production of the foam digester is complete at the very point where it is used.

Expansion nozzles 20, 22 release foam digester along the walls of the tank or guard ring, the foam flows down the wall to the liquid surface, on the one hand cools the wall and on the other hand forms an insulating layer on the wall To protect the wall from flames and heat. When the foam reaches the surface of the burning gas, the foam drifts over the surface and moves from the tank or guard ring wall to the center of the liquid surface, and the foam gradually covers the surface. Since the foam supply lasts long, the foam gradually closes and shrinks the combustible surface of the liquid while the already covered surface is separated from the flame. Bubbles floating on the liquid surface approach the center or, in the case of floating roof tanks or tanks with guard rings, the foam reaches the bubble barrier or tank wall and approaches it, thus By covering the liquid combustible surface, the bubbles isolate oxygen from the burning surface and extinguish it. In one fire extinguisher embodiment, a fire stabilized in a laboratory tank with a surface area of 500 m ² was extinguished in 30 seconds.

  The choke elements 51, 52, 53, 54 ensure that the pressure drop of the pneumatic detector achieves the pressure of the gas space acting as a pneumatic power supply to an acceptable extent with only a delay.

  The pneumatic control unit 40 sends a signal indicating a fire to either of the pneumatic detectors 31 and 32 installed on the storage tank 10 or both of the pneumatic detectors 35 and 36 installed on the protective ring 12. In this case, the construction of sending only when the pressure changes in the sense of indicating a fire ensures protection against erroneous start of the fire extinguishing device according to the present invention.

  If the pressure changes with only one pneumatic detector in storage tank 10 or guard ring 12, or changes in two pneumatic detectors installed at different locations, control unit 40 will It is not considered a signal indicating a fire and does not send a control signal indicating a fire.

  The fire extinguishing apparatus is configured such that the expansion nozzle 20 of the storage tank 10 is connected to the foam tank 15 by an individual main valve, and the expansion nozzle 22 of the protective ring 12 is also connected to the foam tank 15 by another main valve. You can also. The control unit 40 of such a device opens only one main valve, or the other main valve, or both main valves supplying the corresponding expansion nozzles, depending on the signal received from the pneumatic detector. Thus, only the tank, or only the guard ring, or both are filled with foam.

  One simple embodiment of the fire extinguishing device according to the invention has only two pneumatic detectors installed on the tank. In this embodiment, the control unit 40 sends a control signal to open the main valve when the pressure changes to indicate a fire at both pneumatic detectors.

  The fire extinguishing device according to the invention can also be configured to have a separate pneumatic power supply unit, which unit consists of a gas cylinder combined with a pressure stabilizer, which gas cylinder is used for the foam generation and Filled with a driving gas or with a suitable gas that is inert to the foam generation and driving gas and environment used. It is a particularly safe and reliable embodiment of the fire extinguishing device that the pneumatic power supply consisting of a gas cylinder combined with a pressure stabilizer is a parallel combination of the gas spaces 16 of the foam tank 15 .

  The main advantage of the fire extinguishing device according to the invention is that overcompressed foam production and / or driving gas is filled into the foam tank of the fire extinguisher and overpressure is maintained in the tank, so That is, all of the energy required to open the main valve, produce foam digester and transport the foam digester from the tank to the point of use is stored in the form of pressure energy. Thus, the fire extinguishing device is kept ready for use and automatically operates at any time, regardless of the presence and usefulness of any other network, such as an electrical network, drainage network, fuel tank, etc., and the pump status. Is possible.

  Another major advantage of the fire extinguishing device according to the invention is that its detector is a pneumatic detector, so that when the supply pressure is present, the detector is always ready for operation. Operates automatically. In the case of a fire, the information conveying the detector output signal is a pneumatic signal, preferably a drop in the detector pressure from supply pressure to atmospheric pressure, one working substance suitable for the operation of the device. And this actuating substance can preferably be selected as a foam generating and / or driving gas under pressure, so that in this case it is necessary to store the energy required for the operation of the device. It is a material that works, and at the same time it is also a material that sends information that conveys the signals necessary for the operation of the device. Another advantage is that by organizing the detectors into logical connections, the device is substantially insensitive to false sense signals.

  Adapting to real needs, the fire extinguishing device according to the present invention arranges pneumatic detectors according to real needs, organizes pneumatic detectors into several logical connections according to real needs, and in some cases pneumatic Organize the detector into several connections and install it in any size fuel tank by using one or several pneumatic control units to control the main valve in the pipes supplying the individual expansion nozzles Can be implemented.

  The fire extinguishing apparatus according to the present invention can also be used as an automatic fixed installation type fire extinguishing apparatus that protects several storage tanks independently of each other.

  The fire extinguishing device according to the present invention is particularly used as a stationary installation device for extinguishing a storage tank storing liquid hydrocarbons such as gasoline, kerosene, petroleum, or other flammable liquids such as alcohol or other solvents. However, the fire extinguishing apparatus can be used as a self-fixing installation type foam extinguishing apparatus in other places, for example, in a warehouse for storing combustible substances.

It is a conceptual diagram which shows schematic structure of the fire extinguisher of one embodiment of this invention.

Claims (9)

  Automatic foam extinguisher, especially used as a stationary installation device for extinguishing liquid hydrocarbon storage tanks, having tank, means for spreading foam, piping and main valve installed in the piping, and detector In the apparatus, the tank stores an over-compressed mixture of foam-forming compound, water, foam-generating and driving gas that is soluble or emulsifiable in a solution of the foam-forming compound and water (15 The tank has a gas space (16), the means for expanding the foam extinguishing device is an expansion nozzle (20, 22), and the detectors are independent of each other and essentially similar Consists of at least two pneumatic detectors (31, 32; 35, 36) arranged to detect combustion in the way, connecting the foam tank (15) with the expansion nozzle (20, 22) The main valve (18) installed in the pipe (17) is pneumatic. Two pneumatic detectors (31, 32; 35, 36) that monitor the same area are in a common control arrangement, and they are directly or indirectly connected to the main valve (18) via a pneumatic control connection A fire extinguishing apparatus that provides a start control signal to the main valve (18) when a fire is detected.   The fire extinguishing apparatus according to claim 1, wherein the bubble generating gas and the driving gas are one kind of gas, preferably carbon dioxide.   The fire-extinguishing apparatus according to claim 1, wherein the bubble generating gas and the driving gas are a mixture of gases, preferably a mixture containing carbon dioxide.   4. The pneumatic detector (31, 32; 35, 36) is a linear detector or a detector composed of a sprinkler head mounted on a metal pipe. The fire extinguishing apparatus of any one.   The pneumatic detectors (31, 32; 35, 36) are formed around the inside of the tank wall so that they can be attached at a predetermined distance from each other in the vicinity of the peripheral edge of the tank. The fire extinguishing apparatus according to any one of claims 1 to 4, characterized in that:   A pneumatic control unit (40), wherein the pneumatic detector (31, 32; 35, 36) is connected to the input of the pneumatic control unit (40), and the control input of the main valve (18) Is connected to the output of the pneumatic control unit (40), which is connected to two pneumatic detectors (31, 32; 35, 36) that monitor the same area for signals indicating ignition. The control unit is arranged to provide a control signal with a command to open the main valve (18) at its output when it reaches its input. The fire extinguishing apparatus according to any one of 5.   The pneumatic control unit (40) includes several pneumatic logic AND elements (61, 63) and one pneumatic logic OR element (65 connected to the output of the logical AND elements (61, 63). ) And the input part of the pneumatic logic logic AND element (61, 63) is suitably in the same area, for example the internal area of the tank or the area of the guard ring, by means of the molding element (56, 57, 58, 59) It consists of the input part of the pneumatic control unit (40) that houses the detectors (31, 32; 35, 36) that monitor the air, and the output part of the pneumatic logic OR element (65) is appropriately connected to the molding element (67 The fire extinguishing device according to any one of claims 1 to 5, characterized in that it comprises an output part of a pneumatic control unit (40) connected to a control input part of the main valve (18). .   8. The pneumatic power source and pneumatic element of the pneumatic detector (31, 32; 35, 36) is a gas space (16) of a foam tank (15). The fire extinguishing apparatus according to item 1. 9. A pneumatic power unit comprising a gas cylinder combined with a pressure stabilizer, wherein the pneumatic detector (31, 32; 35, 36) and the pneumatic element comprise a pneumatic power supply unit. The fire extinguishing apparatus according to claim 1.

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