EP0238475A1 - Fire extinguishing apparatus - Google Patents
Fire extinguishing apparatus Download PDFInfo
- Publication number
- EP0238475A1 EP0238475A1 EP87890028A EP87890028A EP0238475A1 EP 0238475 A1 EP0238475 A1 EP 0238475A1 EP 87890028 A EP87890028 A EP 87890028A EP 87890028 A EP87890028 A EP 87890028A EP 0238475 A1 EP0238475 A1 EP 0238475A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oil
- boiler
- fire
- transformer
- nitrogen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C99/00—Subject matter not provided for in other groups of this subclass
- A62C99/0009—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
- A62C99/0018—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames using gases or vapours that do not support combustion, e.g. steam, carbon dioxide
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/06—Fire prevention, containment or extinguishing specially adapted for particular objects or places of highly inflammable material, e.g. light metals, petroleum products
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
Definitions
- the invention relates to a device for extinguishing a fire for a boiler which is filled with a combustible medium, in particular for an oil transformer, wherein a storage container filled with inert gas, in particular nitrogen, is provided, which is connected to the boiler at the bottom.
- combustion is a complex chemical reaction in which liquid or solid fuels are converted into gas or vapors under the action of heat, which in turn undergo a chemical reaction with the release of heat.
- a heat wave develops on the evaporation front, which slowly progresses into the interior of the oil volume.
- the average spreading speed is between 30 - 45 cm / H.
- the rate of propagation is between 10 - 30 cm / h.
- the main cause of the outbreak of transformer fires is damage to the bushing and secondly, the extent of the damage is significantly increased by the burning oil leaking due to the oil volume in the expansion vessel.
- the main danger of overflowing the burning oil is the gradual charring of the seals, which can lead to an uncontrollable leakage of the oil and the spreading of the fire into the active part after a relatively short time (between l0 - 30 minutes after the fire broke out) .
- the object of the invention is therefore to provide a device of the type mentioned at the beginning with which the secondary damage shown above can be avoided on the one hand and which on the other hand is also characterized by a simple structure.
- the device according to the invention is characterized in that perforated pipes, channels or the like are arranged in the bottom region of the boiler, via which the nitrogen can be blown into the boiler with an overpressure for uniform floating of the medium.
- the first time it is possible for the first time to shorten the fire duration by about two thirds.
- the hot zone is therefore suppressed.
- the temperature of the evaporation surface is thus reduced to a value close to that of the temperature of the cool medium.
- the resulting reduction in the amount of evaporation either leads to a sharp reduction in the flame intensity or completely extinguishes the fire.
- the device according to the invention takes advantage of the physical conditions shown above.
- the oil in the boiler is used to cool the oil surface brought to the combustion temperature by an arc fault (the flash point of transformer oils for insulation purposes is between l35 - l65 °).
- the cooling is achieved by bringing the oil from the lower, cooler zones (the average transformer temperature at full load is 80 ° C as standard) to the surface in order to displace the oil layer (min. Flash point) heated by the arcing fault.
- dry nitrogen according to the invention is introduced under excess pressure. Before the gas is blown in, the oil supply from the expansion vessel must be cut off and the oil level lowered to a level between the lower edge of the transformer cover and the upper edge of the active part.
- Another advantage of the invention is that this device is independent of water, temperature and climate, and is also conceivably suitable for the interior due to the extremely small space requirement.
- the pipes, channels or the like are parts of the boiler construction.
- the outlay for investing this invention is kept extremely low.
- the injection system can be included in the design of the transformer tank.
- the oil transformer l consists of the boiler 2, its winding 3, the oil coolers 4, the oil expansion tank 5 and the bushings 6. Furthermore, a storage container 7 is provided for the inert gas, in particular nitrogen. This reservoir 7 is connected to the boiler 2 via lines 8.
- the boiler 2 has a line 9 in the upper region, which is used to lower the oil level.
- Valves, not specified, are provided in lines 8, 9, which are controlled centrally in the event of a fire.
- the lines 8, which conduct the inert gas from the storage container 7 into the boiler 2, are connected to this in the bottom area.
- 2 perforated pipes 10 are arranged in the boiler. These pipes 10 could also be included in the boiler construction. It is particularly important that these pipes 10 are evenly distributed over the floor, so that a metered, uniform mixing of the oil is achieved in the event of a fire.
- the amount of gas introduced which is evenly metered in the bottom region of the boiler 2, mixes the small amount of hot oil with the large amount of cool oil such that the hot zone is suppressed.
- the temperature of the oil surface is thus reduced to a value close to that of the cool oil. The result is a complete extinction of the fire.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
Description
Die Erfindung betrifft eine Einrichtung zum Löschen eines Brandes für einen Kessel, der mit einem brennbaren Medium gefüllt ist, insbesondere für einen Öltransformator, wobei ein mit inertem Gas, insbesondere Stickstoff, gefüllter Vorratsbehälter vorgesehen ist, der an den Kessel unten angeschlossen ist.The invention relates to a device for extinguishing a fire for a boiler which is filled with a combustible medium, in particular for an oil transformer, wherein a storage container filled with inert gas, in particular nitrogen, is provided, which is connected to the boiler at the bottom.
Es darf als bekannt vorausgesetzt werden, daß eine Verbrennung eine komplexe chemische Reaktion ist, bei der sich flüssige oder feste Brennstoffe unter der Einwirkung von Wärme in Gas oder Dämpfe umwandeln, die wieder ihrerseits unter Abgabe von Wärme eine chemische Reaktion durchlaufen. Diese Umwandlung ist umso größer, je höher die Temperatur ist.It can be assumed that combustion is a complex chemical reaction in which liquid or solid fuels are converted into gas or vapors under the action of heat, which in turn undergo a chemical reaction with the release of heat. The higher the temperature, the greater the conversion.
Zur besseren Darstellung werden in Kurzfassung die Abläufe erläutert, die bei der Entstehung eines Brandes in einem mit flüssigen Kohlenwasserstoffen gefüllten Tank auftreten.For a better representation, the processes that occur when a fire occurs in a tank filled with liquid hydrocarbons are briefly explained.
Bei lokaler Überschreitung des Flammpunktes entzünden sich die entweichenden Gase und Dämpfe und aufgrund der Hitzeentwicklung breitet sich der Brand schnell über die gesamte Oberfläche aus.If the flash point is exceeded locally, the escaping gases and vapors ignite and due to the heat development, the fire spreads quickly over the entire surface.
Falls der Tank beispielsweise mit unraffiniertem Erdöl gefüllt ist, so entweichen zuerst die flüchtigen und leichten Bestandteile.For example, if the tank is filled with unrefined petroleum, the volatile and light components will escape first.
An der Verdampfungsfront entsteht eine Hitzewelle, die langsam ins Innere des Ölvolumens fortschreitet.A heat wave develops on the evaporation front, which slowly progresses into the interior of the oil volume.
Da Erdöl einen großen Siedebereich aufweist, stellt diese Tatsache für eine derartige Ausbreitung sehr günstige Bedingungen dar: die leichteren, flüchtigeren Bestandteile erwärmen bei der Verbrennung die schwereren Bestandteile, die beim Absinken die in der Masse gespeicherte Wärme mitführen.Since petroleum has a large boiling range, this fact represents very favorable conditions for such a spread: the lighter, more volatile components heat up the combustion of the heavier components, which carry the heat stored in the mass when they sink.
Je nach Erzeugnis beträgt im Mittel die Ausbreitungsgeschwindigkeit zwischen 30 - 45 cm/H. Für das Transformatoröl welches sowohl ein dielektrisches als auch thermisches Isoliermittel ist, liegt die Ausbreitungsgeschwindigkeit zwischen l0 - 30 cm/h.Depending on the product, the average spreading speed is between 30 - 45 cm / H. For the transformer oil, which is both a dielectric and thermal insulating agent, the rate of propagation is between 10 - 30 cm / h.
Je nach Brennstoff befindet sich eine mehr oder weniger dünne heiße Zone an der Oberfläche und darunter ein großes kühles Mediumvolumen.Depending on the fuel, there is a more or less thin hot zone on the surface and a large cool medium volume underneath.
Bei mit Öl gefüllten Transformatoren haben statistische Untersuchungen ergeben, daß zwei wesentliche Punkte bei Bränden immer wieder auftreten.In the case of transformers filled with oil, statistical studies have shown that two essential points always occur in fires.
Die Hauptursache für den Ausbruch von Transformatorbränden ist ein Schaden an der Durchführung und zweitens wird das Schadensausmaß durch das Auslaufen des brennenden Öls aufgrund des Ölvolumens im Dehngefäß wesentlich vergrößert.The main cause of the outbreak of transformer fires is damage to the bushing and secondly, the extent of the damage is significantly increased by the burning oil leaking due to the oil volume in the expansion vessel.
Ferner haben Versuche gezeigt, daß selbst wenn es gelingt die Ölzufuhr vom Dehngefäß her zum Zeitpunkt des Brandausbruchs zu unterbinden, es nach kurzer Zeit (ca. 4 - 5 Minuten) zu einem neuerlichen Überlaufen des Öls aufgrund der thermischen Ausdehnung des Ölvolumens kommt.In addition, tests have shown that even if the oil supply from the expansion vessel is cut off at the time of the fire, the oil will overflow again after a short time (approx. 4-5 minutes) due to the thermal expansion of the oil volume.
Die hauptsächliche Gefahr die das Überlaufen des brennenden Öls birgt, ist das allmähliche Verkohlen der Dichtungen, was nach einer relativ kurzen Zeit (zwischen l0 - 30 Minuten nach Brandausbruch) zu einem unkontrollierbaren Auslaufen des Öls und dem Ausbreiten des brandes bis in den Aktivteil führen kann.The main danger of overflowing the burning oil is the gradual charring of the seals, which can lead to an uncontrollable leakage of the oil and the spreading of the fire into the active part after a relatively short time (between l0 - 30 minutes after the fire broke out) .
Dies führt dann dazu, daß der Transformator zumindest schwer beschädigt wird. In diesem Stadium des Brandes ist es normalerweise schwierig soweit an das brennende Objekt heranzukommen um in das Innere des Transformators mit dem Löschwasser einzudringen. Es ist bekannt, daß die Transformatoren der heutigen Zeit sehr hoch ausgenützt sind, d. h. daß die hohen Induktionen und Feldstärken an die verwendeten Materialien höchste Ansprüche stellen. Die zum Einsatz kommenden Isoliermaterialien sind sehr feuchtigkeitsempfindlich und die Schäden, die durch das Eindringen des Löschwassers entstehen können, sind oft genauso folgenschwer wie die durch das Feuer.This then leads to the transformer being at least severely damaged. At this stage of the fire, it is usually difficult to get as far as the burning object to penetrate the interior of the transformer with the extinguishing water. It is known that the transformers of today are very highly utilized, i. H. that the high induction and field strengths place the highest demands on the materials used. The insulating materials used are very sensitive to moisture and the damage that can occur as a result of the penetration of the extinguishing water is often as serious as that caused by the fire.
Es ist deshalb bereits die eingangs erwähnte Einrichtung zum Löschen von Bränden vorgeschlagen worden. Die oben aufgezeigten Sekundärschäden sind jedoch auch bei dieser Einrichtung aufgetreten.The device for extinguishing fires mentioned at the beginning has therefore already been proposed. However, the secondary damage shown above also occurred in this facility.
Aufgabe der Erfindung ist es daher, eine Einrichtung der eingangs genannten Art zu schaffen, mit der einerseits die oben aufgezeigten Sekundärschäden vermieden werden und die andererseits sich auch durch einen einfachen Aufbau auszeichnet.The object of the invention is therefore to provide a device of the type mentioned at the beginning with which the secondary damage shown above can be avoided on the one hand and which on the other hand is also characterized by a simple structure.
Die Einrichtung gemäß der Erfindung ist dadurch gekennzeichnet, daß im Bodenbereich des Kessels perforierte Rohre, Kanäle od. dgl. angeordnet sind, über die der Stickstoff mit Überdruck in den Kessel zum gleichmäßigen Durchschwemmen des Mediums einblasbar ist.The device according to the invention is characterized in that perforated pipes, channels or the like are arranged in the bottom region of the boiler, via which the nitrogen can be blown into the boiler with an overpressure for uniform floating of the medium.
Mit dieser erfindungsgemäßen Einrichtung ist erstmals die Möglichkeit gegeben, die Branddauer um etwa zwei Drittel zu verkürzen. Erreicht wird dies dadurch, daß die geringe Menge des heißen Mediums mit der großen Menge des kühlen Mediums gezielt, durch das Einblasen des inerten Gases, vermischt wird. Die heiße Zone wird also unterdrückt. Die Temperatur der Verdampfungsfläche wird somit auf einen Wert nahe dem der Temperatur des kühlen Mediums gesenkt. Die daraus resultierende Verringerung der Verdampfungsmenge bewirkt entweder eine starke Verminderung der Flammenintensität oder völliges Erlöschen des Brandes.With this device according to the invention, it is possible for the first time to shorten the fire duration by about two thirds. This is achieved in that the small amount of the hot medium is specifically mixed with the large amount of the cool medium by blowing in the inert gas. The hot zone is therefore suppressed. The temperature of the evaporation surface is thus reduced to a value close to that of the temperature of the cool medium. The resulting reduction in the amount of evaporation either leads to a sharp reduction in the flame intensity or completely extinguishes the fire.
Auf das Transformatoröl angewandt, würde somit eine Abkühlung des Brennstoffes zu einer Verlangsamung bzw. Aufhören der Vergasung führen. Bei ausreichender Abkühlung werden in der Verbrennungszone keine oder nur mehr geringe Mengen des brennbaren Gases entstehen wodurch der Brand unterkritisch wird und somit das Feuer erlischt. Die Grenze zwischen über- und unterkritischem Bereich wird durch den sogenannten Flammpunkt angegeben.Applied to the transformer oil, a cooling of the fuel would slow down or stop the gasification. With sufficient cooling, no or only small amounts of the combustible gas will be generated in the combustion zone, making the fire subcritical and the fire going out. The boundary between the supercritical and subcritical range is indicated by the so-called flash point.
Die erfindungsgemäße Einrichtung macht sich die oben aufgezeigten physikalischen Gegebenheiten zu Nutze. Das im Kessel befindliche Öl wird verwendet um die durch einen Fehlerlichtbogen auf die Verbrennungstemperatur gebrachte Öloberfläche abzukühlen (der Flammpunkt von Transformatorenölen für Isolierzwecke liegt zwischen l35 - l65°). Die Abkühlung wird dadurch erreicht, daß das Öl aus den unteren kühleren Zonen (die mittlere Transformatortemperatur bei Vollast liegt normgemäß bei 80°C) an die Oberfläche bringt, um dort die durch den Fehlerlichtbogen aufgeheizte Ölschicht (min. Flammpunkt) zu verdrängen.The device according to the invention takes advantage of the physical conditions shown above. The oil in the boiler is used to cool the oil surface brought to the combustion temperature by an arc fault (the flash point of transformer oils for insulation purposes is between l35 - l65 °). The cooling is achieved by bringing the oil from the lower, cooler zones (the average transformer temperature at full load is 80 ° C as standard) to the surface in order to displace the oil layer (min. Flash point) heated by the arcing fault.
Um diese gleichmäßige Durchmischung zu erreichen wird am Boden trockener Stickstoff gemäß der Erfindung unter Überdruck eingebracht. Bevor mit dem Einblasen des Gases begonnen wird, ist die Ölzufuhr vom Dehngefäß her zu unterbinden, sowie der Ölspiegel auf ein Niveau zwischen Unterkante Transformatordeckel und Oberkante des Aktivteils abzusenken.In order to achieve this uniform mixing, dry nitrogen according to the invention is introduced under excess pressure. Before the gas is blown in, the oil supply from the expansion vessel must be cut off and the oil level lowered to a level between the lower edge of the transformer cover and the upper edge of the active part.
Ein weiterer Vorteil der Erfindung ist noch, daß diese Einrichtung unabhängig von Wasser, Temperatur und Klima ist, und auch aufgrund des äußerst geringen Platzbedarfes für Innenraum denkbar geeignet ist.Another advantage of the invention is that this device is independent of water, temperature and climate, and is also conceivably suitable for the interior due to the extremely small space requirement.
Gemäß einer Ausgestaltung der Erfindung sind die Rohre, Kanäle od. dgl. Teile der Kesselkonstruktion. Dadurch wird vor allem der Aufwand für die Investition dieser Erfindung äußerst gering gehalten. Das Einblassystem kann schon bei der Konstruktion des Trafokessels mitgeplant werden.According to an embodiment of the invention, the pipes, channels or the like are parts of the boiler construction. As a result, the outlay for investing this invention is kept extremely low. The injection system can be included in the design of the transformer tank.
Die Erfindung wird an Hand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert.The invention is explained in more detail with reference to an embodiment shown in the drawing.
Gemäß der Fig. besteht der Öl-Transformator l aus dem Kessel 2, seiner Wicklung 3, den Ölkühlern 4, dem Ölausdehnungsgefäß 5 sowie den Durchführungen 6. Ferner ist ein Vorratsbehälter 7 für das inerte Gas, insbesondere Stickstoff vorgesehen. Dieser Vorratsbehälter 7 ist über Leitungen 8 mit dem Kessel 2 verbunden.According to the Fig. The oil transformer l consists of the
Darüber hinaus weist der Kessel 2 im oberen Bereich eine Leitung 9 auf, die zum Absenken des Ölspiegels dient. Nicht näher bezeichnete Ventile sind in den Leitungen 8,9 vorgesehen, die im Brandfall zentral gesteuert werden.In addition, the
Die Leitungen 8, die das inerte Gas vom Vorratsbehälter 7 in den Kessel 2 leiten, sind im Bodenbereich an diesen angeschlossen.The
Um nun ein gleichmäßiges Durchschwemmen des Öls zu erreichen, sind im Kessel 2 perforierte Rohre l0 angeordnet. Diese Rohre l0 könnten aber auch in die Kesselkonstruktion einbezogen sein. Wichtig vor allem ist, daß diese Rohre l0 gleichmäßig über dem Boden verteilt sind, sodaß eine dosierte, gleichmäßige Durchmischung des Öles im Brandfall erreicht wird.In order to achieve an even floating of the oil, 2 perforated
Tritt nun ein Brand im Bereich einer Durchführung 6 auf, so wird automatisch die Ölzufuhr vom Ölausdehnungsgefäß 5 unterbunden und der Ölspiegel über die Leitung 9 abgesenkt. Praktisch gleichzeitig wird über die Leitung 8 inertes Gas mit Überdruck in den Kessel 2 eingebracht.If a fire now occurs in the area of a
Die im Bodenbereich des Kessels 2 gleichmäßig dosierte, eingebrachte Gasmenge durchmischt die geringe Menge heißen Öls mit der großen Menge kühlen Öls derart, daß die heiße Zone unterdrückt wird. Die Temperatur der Öloberfläche wird somit auf einen Wert nahe dem der Temperatur des kühlen Öles gesenkt. Ein völliges Erlöschen des Brandes ist die Folge.The amount of gas introduced, which is evenly metered in the bottom region of the
Auch ein Überlaufen des Öles aufgrund der thermischen Ausdehnung ist nicht gegeben.There is also no overflow of the oil due to the thermal expansion.
Claims (2)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT44186A AT386527B (en) | 1986-02-20 | 1986-02-20 | DEVICE FOR EXTINGUISHING A FIRE |
| AT441/86 | 1986-02-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0238475A1 true EP0238475A1 (en) | 1987-09-23 |
Family
ID=3490693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87890028A Withdrawn EP0238475A1 (en) | 1986-02-20 | 1987-02-13 | Fire extinguishing apparatus |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0238475A1 (en) |
| JP (1) | JPS62233172A (en) |
| AT (1) | AT386527B (en) |
| FI (1) | FI870717A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0750321A1 (en) * | 1995-06-19 | 1996-12-27 | Jürgen Bastian | Device protecting liquid media, especially electric insulating media, from fire involvement |
| WO1997012379A1 (en) * | 1995-09-28 | 1997-04-03 | Philippe Magnier | Method and device for preventing explosions and fires in electrical transformers |
| WO2007057916A3 (en) * | 2005-11-16 | 2007-07-12 | Ctr Mfg Ind Ltd | Method and device for prevention and protection of electrical transformer against explosion and fire |
| US7317598B2 (en) | 2005-06-29 | 2008-01-08 | Philippe Magnier | Electric transformer explosion prevention device |
| CZ300916B6 (en) * | 1999-03-22 | 2009-09-09 | Device for preventing explosion in electrical transformer | |
| US7777994B2 (en) | 2006-10-27 | 2010-08-17 | Philippe Magnier | Device for preventing the explosion of an element of an electrical transformer |
| CN106390335A (en) * | 2016-08-31 | 2017-02-15 | 常州市达克富尔环保科技有限公司 | Oil-draining and nitrogen-injecting fire extinguishing device comprising double oil draining systems |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104436477B (en) * | 2014-12-01 | 2017-09-08 | 国家电网公司 | The large-scale oily plant of transformer station integrates fire-fighting system and method |
| CN106267627B (en) * | 2016-10-20 | 2022-01-25 | 中国能源建设集团云南省电力设计院有限公司 | Transformer explosion fire extinguishing system |
| CN106422122B (en) * | 2016-10-31 | 2022-01-25 | 中国能源建设集团云南省电力设计院有限公司 | Foam-nitrogen injection fire extinguishing system for transformer explosion fire |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191410098A (en) * | 1913-04-26 | 1915-07-08 | Hans Berndt | Improvements in or relating to Extinguishing Flames in Tanks for Inflammable Liquids. |
| US2449270A (en) * | 1944-09-29 | 1948-09-14 | Charles E Bennett | Apparatus for protecting inflammable liquids against fire |
| US3486562A (en) * | 1968-03-08 | 1969-12-30 | David K Goodloe | Fire prevention,detection and extinguishing system |
| DE2554224A1 (en) * | 1975-12-03 | 1977-06-08 | Kugel Kg Gustav | Valuable item storage room fire protection - has constant air exhaust with built in smoke and temperature detector |
| GB1479432A (en) * | 1974-06-11 | 1977-07-13 | Lisnave Estaleiros Navais De L | Safety device for the compensation of leaks or losses of inert gas pressure contained inside vessel tanks |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3899099A (en) * | 1973-06-21 | 1975-08-12 | Tank Sapp Uk Ltd | Inert gas system and method for tankers |
| US3893514A (en) * | 1973-11-23 | 1975-07-08 | Us Navy | Suppression of fires in confined spaces by pressurization |
| DE2608670C2 (en) * | 1976-03-03 | 1978-10-12 | Howaldtswerke-Deutsche Werft Ag Hamburg Und Kiel, 2300 Kiel | Method and device for extinguishing burning gases formed by evaporation from liquid gas |
| CA1152857A (en) * | 1982-11-01 | 1983-08-30 | Walter G. Miller | Fire extinguishing system |
-
1986
- 1986-02-20 AT AT44186A patent/AT386527B/en not_active IP Right Cessation
-
1987
- 1987-02-13 EP EP87890028A patent/EP0238475A1/en not_active Withdrawn
- 1987-02-20 FI FI870717A patent/FI870717A/en not_active Application Discontinuation
- 1987-02-20 JP JP62035974A patent/JPS62233172A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191410098A (en) * | 1913-04-26 | 1915-07-08 | Hans Berndt | Improvements in or relating to Extinguishing Flames in Tanks for Inflammable Liquids. |
| US2449270A (en) * | 1944-09-29 | 1948-09-14 | Charles E Bennett | Apparatus for protecting inflammable liquids against fire |
| US3486562A (en) * | 1968-03-08 | 1969-12-30 | David K Goodloe | Fire prevention,detection and extinguishing system |
| GB1479432A (en) * | 1974-06-11 | 1977-07-13 | Lisnave Estaleiros Navais De L | Safety device for the compensation of leaks or losses of inert gas pressure contained inside vessel tanks |
| DE2554224A1 (en) * | 1975-12-03 | 1977-06-08 | Kugel Kg Gustav | Valuable item storage room fire protection - has constant air exhaust with built in smoke and temperature detector |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0750321A1 (en) * | 1995-06-19 | 1996-12-27 | Jürgen Bastian | Device protecting liquid media, especially electric insulating media, from fire involvement |
| WO1997012379A1 (en) * | 1995-09-28 | 1997-04-03 | Philippe Magnier | Method and device for preventing explosions and fires in electrical transformers |
| FR2739486A1 (en) * | 1995-09-28 | 1997-04-04 | Magnier Philippe | METHOD AND DEVICE FOR PROTECTION AGAINST EXPLOSION AND FIRE OF ELECTRICAL TRANSFORMERS |
| CZ300916B6 (en) * | 1999-03-22 | 2009-09-09 | Device for preventing explosion in electrical transformer | |
| CN102768896A (en) * | 2005-06-29 | 2012-11-07 | 菲利普·马尼耶 | Device for preventing the explosion of an electrical transformer |
| US7317598B2 (en) | 2005-06-29 | 2008-01-08 | Philippe Magnier | Electric transformer explosion prevention device |
| CN102768896B (en) * | 2005-06-29 | 2015-04-01 | 菲利普·马尼耶 | Device for preventing the explosion of an electrical transformer |
| WO2007057916A3 (en) * | 2005-11-16 | 2007-07-12 | Ctr Mfg Ind Ltd | Method and device for prevention and protection of electrical transformer against explosion and fire |
| US7869167B2 (en) | 2005-11-16 | 2011-01-11 | Ctr Manufacturing Industries Limited | Method and device for prevention and protection of electrical transformer against explosion and fire |
| KR101021348B1 (en) * | 2005-11-16 | 2011-03-14 | 시티알 매뉴팩쳐링 인더스트리즈 리미티드 | Method and device for prevention and protection of electrical transformer against explosion and fire |
| CN101268531B (en) * | 2005-11-16 | 2011-05-25 | Ctr工业制造股份有限公司 | Method and device for prevention and protection of electrical transformer against explosion and fire |
| AU2006314089B2 (en) * | 2005-11-16 | 2009-07-16 | Ctr Manufacturing Industries Limited | Method and device for prevention and protection of electrical transformer against explosion and fire |
| US8264804B2 (en) | 2006-10-27 | 2012-09-11 | Philippe Magnier | Device for preventing the explosion of an element of an electrical transformer |
| US7777994B2 (en) | 2006-10-27 | 2010-08-17 | Philippe Magnier | Device for preventing the explosion of an element of an electrical transformer |
| CN106390335A (en) * | 2016-08-31 | 2017-02-15 | 常州市达克富尔环保科技有限公司 | Oil-draining and nitrogen-injecting fire extinguishing device comprising double oil draining systems |
Also Published As
| Publication number | Publication date |
|---|---|
| FI870717A0 (en) | 1987-02-20 |
| ATA44186A (en) | 1988-02-15 |
| JPS62233172A (en) | 1987-10-13 |
| FI870717A (en) | 1987-08-21 |
| AT386527B (en) | 1988-09-12 |
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