EP0895026A1 - Procédé et dispositif de suppression de la déflagration à l'extinction d'une flamme de combustion - Google Patents
Procédé et dispositif de suppression de la déflagration à l'extinction d'une flamme de combustion Download PDFInfo
- Publication number
- EP0895026A1 EP0895026A1 EP98401911A EP98401911A EP0895026A1 EP 0895026 A1 EP0895026 A1 EP 0895026A1 EP 98401911 A EP98401911 A EP 98401911A EP 98401911 A EP98401911 A EP 98401911A EP 0895026 A1 EP0895026 A1 EP 0895026A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- nozzle
- flow
- compensation
- injection
- 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.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/465—Details, e.g. noise reduction means for torches
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/82—Preventing flashback or blowback
Definitions
- the present invention relates to a method and to a device making it possible to remove or at least minimize the deflagration occurring during extinction of a combustion flame of a gas flow delivered by a welding nozzle or also called "burner".
- the deflagration or "slamming" occurring during the extinction of the welding flame delivered by a welding nozzle is a well known phenomenon of the welder. This deflagration usually takes place during the power supply shutdown, i.e. when the interruption of the arrival of the welding gas mixture in the nozzle, which gas mixture generally contains at least one combustible gas and at least one oxidizing gas (by gas is meant a substantially pure gas or a mixture several gases).
- the premix flame fed by the combustible / oxidant gas mixture leaving the nozzle welding is the seat of a balance between the progression of the flame front, which tends to return to the inside of the nozzle, and the flow of the gas mixture of combustion delivered by the nozzle, which therefore tends to exit; the average flow velocity of the gas mixture of combustion being a function of the output flow of the gas mixture and the nozzle section of distribution.
- the arrival welding gas is closed by the user, which implies that the flow velocity of the gas mixture decreases until it reaches a zero value.
- a gradual breakdown of the balance implying, when the flow velocity of the gas mixture becomes less than the speed of flame front progression, flame entry to inside the welding nozzle followed by combustion of the gas mixture therein, which did not have the time to be evacuated to the outside, and a subsequent deflagration.
- One of these solutions consists in obtaining a extinction of the flame causing a variation in the content of the welding gas mixture in its gases fuel and oxidizer, so as to go beyond the limits flammability thereof.
- the flammability range of the mixture is between about 2.5% and 93% in acetylene; below and above these values the flame goes out.
- An alternative technique is to purge the nozzle welding and blowing the flame by means of a flux nitrogen gas.
- the aim of the present invention is therefore to propose a method and a device for solving the flame deflagration problem, which does not have the aforementioned drawbacks, which either of simple implementation and of reasonable cost, that is to say compatible with industrial requirements.
- the present invention therefore relates to a method for minimizing or eliminating the deflagration or "slamming" occurring during the extinction of the combustion flame of a gas flow comprising at least one combustible gas and at least one oxidizing gas, said gas flow being delivered by a torch nozzle or "burner", in which the average flow speed (Ve) of the gas flow leaving the nozzle is maintained at or above the average speed of until the flame is completely extinguished re-entry (Vr) of the flame front in said nozzle, namely at an average flow speed (Ve) greater than or equal to 22 m / s -1 .
- Vr average speed of re-entry
- a welding device like the one shown in Figure 1, which includes a torch nozzle 7 or "burner” delivering a mixture of welding gases comprising acetylene as a combustible gas and oxygen as an oxidizing gas.
- acetylene and oxygen are transported, respectively, from a bottle acetylene 1 and an oxygen cylinder 2 up to a injector 6, where the gaseous mixture of welding, prior to its combustion at the outlet of burner 7.
- the transport of acetylene and oxygen is carried out by means of pipes 1 'and 2', respectively; a pressure gauge 3, 3 ', a flow meter mass 4, 4 ', and a regulating valve 5, 5' of the passage gas being arranged, respectively, on each of said pipes 1 ', 2'.
- Example 1 it appears that to avoid the phenomenon of "slamming", it is necessary to maintain the average flow speed (Ve) of the welding gas flow leaving the nozzle at a value greater than or equal to the speed value corresponding to the critical average level of approximately 25 ms -1 (approximate range 22 ms -1 to 28 ms -1 ), i.e. greater than or equal to the reentry speed (Vr) of the front flame in said nozzle.
- Ve average flow speed of the welding gas flow leaving the nozzle at a value greater than or equal to the speed value corresponding to the critical average level of approximately 25 ms -1 (approximate range 22 ms -1 to 28 ms -1 ), i.e. greater than or equal to the reentry speed (Vr) of the front flame in said nozzle.
- valves A and B at manual closing, have been arranged upstream of the pipes 1 'and 2', so that the gas capacity of each of said pipes 1 'and 2', downstream of the valves A and B, is approximately 100 cm 3 .
- R represents the ratio of oxygen consumption to acetylene at different times (consumption ratio);
- Ve the flow speed (ms -1 ) of the oxygen / acetylene mixture at the outlet of the nozzle. welding; and
- t the time in seconds.
- Figures 3 to 5 represent the evolution over time (on the abscissa; units: seconds) of the flow rate (on the ordinate; units: lh -1 ) of the constituents oxygen (curve O 2 ) and acetylene (curve C 2 H 2 ) of the welding mixture at the nozzle outlet.
- Figure 6 makes it possible to compare the flow speed Ve (on the ordinate; units: ms -1 ) of the welding mixture at the nozzle outlet as a function of the evolution of the consumption ratio R (on the abscissa) for tests 1 to 3 of Table I above; this Figure 6 also shows the critical speed curve (Curve Vc) of Figure 2.
- the inventors of the present invention have developed a device for maintaining, at the end of welding, when the flame goes out, the speed flue gas flow to a value at least equal to and preferably greater than the value of critical flow velocity (Vc), i.e. reentry rate (Vr) of the flame in the nozzle.
- Vc critical flow velocity
- Vr reentry rate
- FIG. 7 This device is shown schematically in Figure 7, where we see a device similar to that of Figure 1, but additionally comprising a compensation gas circuit comprising a source 8 of oxidizing compensating gas, here a source of oxygen, connected, via a pipe 8 ', at a point C located downstream of the gate valve setting 5.
- a compensation gas circuit comprising a source 8 of oxidizing compensating gas, here a source of oxygen, connected, via a pipe 8 ', at a point C located downstream of the gate valve setting 5.
- the flow of compensation gas from source 8 to line 1 ' is controlled by a valve 9 of setting.
- the source 8 of compensation and source 2 of oxidizing gas (oxygen) are different, it is particularly advantageous use a single source of oxidizing gas (oxygen) as a source 2 of oxidizing gas and as a source 8 of compensation gas.
- a bypass B arranged between the supply means 2 ′ of oxidizing gas (oxygen) and the means 1 ′ for supplying combustible gas (acetylene), between a first site M located upstream of the regulating valve 5 'for the combustion gas supply and a second site N located downstream of the regulating valve 5 of the fuel gas supply.
- B-pass B has a pipe or 8 'gas circuit and a bypass control means 9, like a bypass valve, making it possible to control the Compensating gas pressure and / or flow rate in said bypass B.
- the C3 site is preferred. Indeed, when oxygen from compensation is injected to compensate for the closure of the acetylene supply, at the end of welding, that is to say when the flame goes out, so maintain the flow velocity Ve of the gas flow higher than the reentry speed Vr of the flame, the slamming phenomenon does not occur whatever the injection site: C1, C2 or C3, thus demonstrating the interest and effectiveness of the invention.
- the C3 site has several advantages, namely in particular excellent functioning, access easy and the ability to maintain pressure compensation gas injection at least equal to the supply pressure or even slightly lower in the case of an aspirating mixer; nevertheless, take care to avoid any rise in compensating oxygen in line 1 ′ of acetylene supply.
- the alternative solutions to a gas injection compensation that may be considered include a increase in the pressure of the oxidizing gas supplied by the 2 'pipe and / or a limitation of the flow rate of gas at the nozzle outlet by a retractable device.
- Example 4 aims to determine when be performed this make-up gas injection and for how long.
- injecting oxygen from compensation takes place between the tap and the injector (site C3); the diameter of the injection orifice being 0.8 mm.
- the inventors have demonstrated, moreover, that it is possible to extinguish the flame without clicking when blowing it.
- the start compensation gas injection is carried out before stop of the welding nozzle supply in said combustible and / or oxidizing gas, preferably approximately 0.1 seconds before the nozzle supply stops.
- Example 4 It should be noted that a combination of the technique exposed in Example 4 and that of the "blowing" of Example 5 is entirely possible.
- Figures 10 to 13 show modes of devices likely to be used to control the opening and closing of valves 5, 5 'and / or 9 in Figure 7 or Figure 14.
- Figure 10 shows a view of underside of a translation control device valve opening / closing, comprising a valve body distribution 16 provided with a push button 15 capable to slide in translation along guides 14 of push button, so in the directions given by the arrow F, when applying manual pressure to said button 15, on which a rack is arranged 19.
- the button 15 gives, via the rack 19, a movement of rotation with a wheel 17 with pinions 18 around the axis of its drum 13, which wheel carries a retractable cam 20 subjected to a restoring force through a return spring 10, so that the cam 19 cooperates with a valve 12 controlling the oxygen supply to compensation.
- button 15 cooperates, via its rear end 15 ', with valves 11, 21 and 22, carried by the distribution body 16, as shown in Figure 12, which is a sectional diagram transverse of said body 16 along line A-A.
- the valves 11, 21 and 22 respectively control supply of compensating oxidant gas (oxygen), oxidizing gas (oxygen), combustible gas (acetylene) and acetylene to supply a pilot light.
- Figure 11 is a diagram in longitudinal section of the Figure 10 device.
- Figure 13 shows a half side view of a rotary valve opening / closing control device, comprising a distribution body 36 provided with an actuating trigger 31 capable of moving in rotation in the directions given by arrow F ', when manual pressure is applied thereto.
- the trigger 31 cooperates, in particular, via a pawl 32, with 4 valves 33, 34, 35 and 37.
- a pressure on the trigger 31 allows, on the one hand, to control the opening of the '' supply of O 2 and C 2 H 2 (valves 33 and 35) and of the injection of C 2 H 2 to the pilot light (valve 34) and, on the other hand, the closing of the supply of the flow of compensating O 2 (valve 37).
- a relaxation of the trigger 31 generates, on the one hand, a closure of the supply of O 2 , C 2 H 2 and of the pilot light and, on the other hand, an opening of the compensation flow in O 2 (valve 37).
- a piezoelectric generator 30 also makes it possible to supply the sparks intended to ignite the gas mixture.
- a cut along line C-C in the body of distribution 36 would have a structure similar to that of Figure 12.
- the present invention is in no way limited to welding, but can also be applied to cutting, in particular flame cutting, heating and various heat treatments, or any field analog using a torch, torch or burner similar to those used in welding.
- the present invention has the advantage considerably reduce clogging of the nozzle and supply conduits thereof, since flashbacks generating, on the one hand, the slamming phenomenon and on the other hand this fouling or other soot deposits, are removed or at least considerably limited. This then results in a torch more reliable and more durable than torches current.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
Description
- Ve est supérieure à Vr;
- on maintient la vitesse moyenne d'écoulement (Ve) par injection, en amont de la buse, d'un gaz de compensation, de préférence, d'un gaz comburant de compensation;
- le début de l'injection dudit gaz de compensation est effectué après arrêt de l'alimentation de la buse de soudage en lesdits gaz combustible et/ou comburant;
- une durée maximale de 1 à 5 sec sépare l'arrêt de l'alimentation de la buse et le début de l'injection du gaz de compensation, de préférence une durée inférieure à 0.5 sec, voire même une durée nulle correspondant à un début d'injection et un arrêt de l'alimentation simultanés;
- le début de l'injection de gaz de compensation est effectué avant arrêt de l'alimentation de la buse de soudage en lesdits gaz combustible et/ou comburant;
- on effectue l'injection du gaz de compensation d'environ 0,05 à environ 2 sec avant l'arrêt de l'alimentation de la buse, de préférence d'environ 0,1 à 0,5 sec;
- on effectue l'injection du gaz de compensation pendant une durée supérieure à 0.02 sec, de préférence supérieure à 0.1 sec;
- on maintient la vitesse moyenne d'écoulement (Ve) du flux gazeux supérieure ou égale à 25 m/s-1, de préférence, supérieure ou égale à 27 m/s-1 ;
- le gaz combustible est choisi dans le groupe formé par l'acétylène, le Crylène™, le Tétrène™, et le propane;
- le gaz comburant est choisi dans le groupe formé par l'oxygène et l'air;
- le gaz compensation est identique au gaz comburant.
- des moyens d'alimentation en gaz combustible comprenant au moins un conduit d'acheminement de gaz combustible et des moyens de régulation du débit de gaz combustible, tel de préférence un robinet de réglage du débit de gaz combustible,
- des moyens d'alimentation en gaz comburant comprenant au moins un conduit d'acheminement de gaz comburant et des moyens de régulation du débit de gaz comburant, tel de préférence un robinet de réglage du débit de gaz combustible,
- et des moyens d'injection d'un gaz de compensation, en amont de la buse, permettant de maintenir la vitesse moyenne d'écoulement (Ve) du flux gazeux sortant de la buse supérieure ou égale à la vitesse moyenne de rentrée (Vr) du front de flamme dans ladite buse,
- les moyens d'injection de gaz de compensation comprennent un bipasse reliant les moyens d'alimentation en gaz comburant aux moyens d'alimentation en gaz combustible.
- le bipasse est aménagé entre un premier site (M) situé en amont des moyens de régulation du débit de gaz comburant, tel un robinet de réglage de l'alimentation en gaz comburant, et un deuxième site (N) situé en aval des moyens de régulation du débit de gaz combustible, tel un robinet de réglage de l'alimentation en gaz combustible.
- le bipasse comporte un circuit de gaz et un moyen de commande de bipasse, telle une valve de bipasse.
- essai 1 : fermeture simultanée des vannes A (interruption alimentation acétylène) et B (interruption alimentation oxygène) avec maintien de la vitesse d'écoulement supérieure au niveau moyen critique (25 m.s-1);
- essai 2 : fermeture simultanée des vannes A et B avec vitesse d'écoulement inférieure au niveau critique;
- essai 3 : fermeture de la vanne A (interruption alimentation acétylène) et vanne B maintenue ouverte (équivalent à un décalage infini) avec vitesse d'écoulement inférieure au niveau critique.
Essai n° | Fermeture vanne(s) | Rapport R et Vitesse Ve (en m/s) au temps t (en s) | Claquement à l'extinction de la flamme | ||||
1 | A et B à t = 7 sec | t = 7 R = 1.03 Ve = 62 | t = 10 R = 1.33 Ve = 50 | t = 12.5 R = 2.2 Ve = 36 | t = 15 R = 4.6 Ve = 29 | / | non |
2 | A et B à t = 12.5 sec | t = 12.5 R = 1.1 Ve = 35 | t = 15 R = 1.2 Ve = 31 | t = 17 R = 1.5 Ve = 27 | t = 20 R = 2 Ve = 23 | t = 25 R = 2.8 Ve = 19 | oui à t = 17.2 sec |
3 | B à t = 6 sec | t = 6 R = 1.08 Ve = 35 | t = 9.5 R = 1.4 Ve = 31.2 | t = 12 R = 1.8 Ve = 25 | / | / | oui à t = 12 sec |
- C1 est situé avant l'injecteur d'oxygène, donc en aval de la canalisation 2';
- C2 est situé dans la chambre d'homogénéisation où s'effectue l'homogénéisation du mélange oxygène/acétylène;
- C3 est situé dans la partie aval de la canalisation d'alimentation 1' en acétylène, entre l'injecteur et le robinet 5.
- la courbe Cb1 représente le cycle du contact électrique commandant les électrovannes 5 et 5' : leur ouverture a lieu à l'instant OE et leur fermeture à l'instant FE;
- la courbe Cb2 représente le cycle de la vanne 5 (vanne acétylène);
- la courbe Cb3 représente le cycle de la vanne 5' (vanne oxygène);
- et la courbe Cb4 représente le cycle de la vanne 9 (vanne gaz de compensation : ici de l'oxygène) dont l'ouverture a lieu à l'instant OC et la fermeture à l'instant FC.
- les instants FE et OC sont décalés, c'est-à-dire espacés dans le temps, de préférence d'une durée t0 d'au plus 1 sec, de préférence d'au plus 0.5 sec;
- les instants OC et FC, donc la durée d'injection, sont espacés dans le temps d'au moins 0.05 sec et, de préférence, d'au moins 0.1 sec.
Claims (14)
- Procédé pour minimiser ou supprimer la déflagration se produisant lors de l'extinction de la flamme de combustion d'un flux gazeux comprenant au moins un gaz combustible et au moins un gaz comburant, ledit flux gazeux étant délivré par une buse de chalumeau, dans lequel on maintient, jusqu'à extinction complète de la flamme, la vitesse moyenne d'écoulement (Ve) du flux gazeux sortant de la buse supérieure ou égale à la vitesse moyenne de rentrée (Vr) du front de flamme dans ladite buse, caractérisé en ce qu'on maintient la vitesse moyenne d'écoulement (Ve) du flux gazeux supérieure ou égale à environ 22 m.s-1.
- Procédé selon la revendication 1, caractérisé en ce qu'on maintient la vitesse moyenne d'écoulement (Ve) par injection, en amont de la buse, d'un gaz de compensation, de préférence, d'un gaz comburant de compensation.
- Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que le début de l'injection dudit gaz de compensation est effectué après arrêt de l'alimentation de la buse de soudage en lesdits gaz combustible et/ou comburant.
- Procédé selon la revendication 3, caractérisé en ce qu'une durée maximale de 1 à 5 sec sépare l'arrêt de l'alimentation de la buse et le début de l'injection du gaz de compensation, de préférence une durée inférieure à 0.5 sec.
- Procédé selon la revendication 2, caractérisé en ce que le début de l'injection de gaz de compensation est effectué avant arrêt de l'alimentation de la buse de soudage en lesdits gaz combustible et/ou comburant.
- Procédé selon la revendication 5, caractérisé en ce qu'on effectue l'injection du gaz de compensation de 0,05 à 2 sec avant l'arrêt de l'alimentation de la buse, de préférence environ 0,1 seconde avant ledit arrêt.
- Procédé selon l'une des revendications 2 à 6, caractérisé en ce qu'on effectue l'injection du gaz de compensation pendant une durée supérieure à 0.02 sec, de préférence supérieure à 0.1 sec.
- Procédé selon l'une des revendications 1 à 7, caractérisé en ce qu'on maintient la vitesse moyenne d'écoulement (Ve) du flux gazeux supérieure ou égale à environ 25 m.s-1, de préférence supérieure ou égale à environ 27 m.s-1.
- Procédé selon l'une des revendications 1 à 8, caractérisé en ce que le gaz combustible est choisi dans le groupe formé par l'acétylène, le Crylène™, le Tétrène™ ou le propane, et/ou en ce que le gaz comburant est choisi dans le groupe formé par l'oxygène et l'air.
- Procédé selon l'une des revendications 1 à 9, caractérisé le gaz compensation est identique au gaz comburant.
- Dispositif de soudage ou de coupage mettant en oeuvre un chalumeau muni d'une buse, ladite buse (7) délivrant un mélange de combustion comprenant au moins un gaz combustible et au moins un gaz comburant, et comportant, en outre :des moyens d'alimentation (1, 1') en gaz combustible comprenant au moins un conduit (1') d'acheminement de gaz combustible et des moyens de régulation (3, 4, 5) du débit de gaz combustible, de préférence un robinet (5) de réglage du débit de gaz combustible,des moyens d'alimentation (2, 2') en gaz comburant comprenant au moins un conduit (2') d'acheminement de gaz comburant et des moyens de régulation (3', 4', 5') du débit de gaz comburant, de préférence un robinet (5') de réglage du débit de gaz combustible,et des moyens d'injection (8, 8', 9) d'un gaz de compensation, en amont de la buse (7), permettant de maintenir la vitesse moyenne d'écoulement (Ve) du flux gazeux sortant de la buse supérieure ou égale à la vitesse moyenne de rentrée (Vr) du front de flamme dans ladite buse (7),
- Dispositif selon la revendication 11, caractérisé en ce que les moyens d'injection (8, 8', 9, B) de gaz de compensation comprennent un bipasse (B) reliant les moyens d'alimentation en gaz comburant (2, 2') aux moyens d'alimentation (1, 1') en gaz combustible.
- Dispositif selon la revendication 12, caractérisé en ce que le bipasse (B) est aménagé entre un premier site (M) situé en amont des moyens de régulation (3, 4, 5) du débit de gaz comburant, tel un robinet de réglage de l'alimentation en gaz comburant, et un deuxième site (N) situé en aval des moyens de régulation (3, 4, 5) du débit de gaz combustible, tel un robinet de réglage de l'alimentation en gaz combustible.
- Dispositif selon l'une des revendications 12 ou 13, caractérisé en ce que le bipasse (B) comporte un circuit de gaz (8') et un moyen de commande de bipasse (9), telle une valve de bipasse.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9709585A FR2766556B1 (fr) | 1997-07-28 | 1997-07-28 | Procede et dispositif de suppression de la deflagration a l' extinction d'une flamme |
FR9709585 | 1997-07-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0895026A1 true EP0895026A1 (fr) | 1999-02-03 |
EP0895026B1 EP0895026B1 (fr) | 2002-05-15 |
Family
ID=9509717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19980401911 Expired - Lifetime EP0895026B1 (fr) | 1997-07-28 | 1998-07-27 | Procédé de suppression de la déflagration à l'extinction d'une flamme de combustion |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0895026B1 (fr) |
DE (1) | DE69805372T2 (fr) |
ES (1) | ES2176932T3 (fr) |
FR (1) | FR2766556B1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2793494A1 (fr) * | 1999-05-12 | 2000-11-17 | Air Liquide | Melange gazeux combustible et son utlisation en oxycoupage |
FR2803021A1 (fr) * | 1999-12-27 | 2001-06-29 | Soudure Autogene Francaise | Chalumeau oxy-combustible |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB830339A (en) | 1956-04-19 | 1960-03-16 | Gen Electric Co Ltd | Improvements in or relating to apparatus comprising one or more gas-oxygen burners |
DE1147546B (de) | 1961-05-30 | 1963-04-25 | Deutsche Bundesbahn | Pruefvorrichtung fuer Injektorschweissbrenner |
US3994663A (en) | 1975-11-28 | 1976-11-30 | John Zink Company | Method and apparatus to prevent air flow inversion in flare stacks |
US4794953A (en) | 1985-10-09 | 1989-01-03 | Castolin S.A. | Torch device with oxygen and combustion gas supply |
FR2728059A1 (fr) | 1994-12-09 | 1996-06-14 | Soudure Autogene Francaise | Dispositif de commande de l'ecoulement de deux gaz et bruleur muni de ce dispositif |
-
1997
- 1997-07-28 FR FR9709585A patent/FR2766556B1/fr not_active Expired - Fee Related
-
1998
- 1998-07-27 EP EP19980401911 patent/EP0895026B1/fr not_active Expired - Lifetime
- 1998-07-27 DE DE1998605372 patent/DE69805372T2/de not_active Expired - Fee Related
- 1998-07-27 ES ES98401911T patent/ES2176932T3/es not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB830339A (en) | 1956-04-19 | 1960-03-16 | Gen Electric Co Ltd | Improvements in or relating to apparatus comprising one or more gas-oxygen burners |
DE1147546B (de) | 1961-05-30 | 1963-04-25 | Deutsche Bundesbahn | Pruefvorrichtung fuer Injektorschweissbrenner |
US3994663A (en) | 1975-11-28 | 1976-11-30 | John Zink Company | Method and apparatus to prevent air flow inversion in flare stacks |
US4794953A (en) | 1985-10-09 | 1989-01-03 | Castolin S.A. | Torch device with oxygen and combustion gas supply |
FR2728059A1 (fr) | 1994-12-09 | 1996-06-14 | Soudure Autogene Francaise | Dispositif de commande de l'ecoulement de deux gaz et bruleur muni de ce dispositif |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2793494A1 (fr) * | 1999-05-12 | 2000-11-17 | Air Liquide | Melange gazeux combustible et son utlisation en oxycoupage |
WO2000070000A1 (fr) * | 1999-05-12 | 2000-11-23 | L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Melange gazeux combustible et son utilisation en oxycoupage |
FR2803021A1 (fr) * | 1999-12-27 | 2001-06-29 | Soudure Autogene Francaise | Chalumeau oxy-combustible |
EP1113222A1 (fr) * | 1999-12-27 | 2001-07-04 | La Soudure Autogene Francaise | Chalumeau oxy-combustible à organe de commande unique des valves |
US6451245B2 (en) | 1999-12-27 | 2002-09-17 | La Soudure Autogene Francaise | Oxy-fuel torch with a single control for the valves |
Also Published As
Publication number | Publication date |
---|---|
FR2766556B1 (fr) | 1999-09-03 |
ES2176932T3 (es) | 2002-12-01 |
FR2766556A1 (fr) | 1999-01-29 |
DE69805372T2 (de) | 2002-11-21 |
EP0895026B1 (fr) | 2002-05-15 |
DE69805372D1 (de) | 2002-06-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2507562C (fr) | Dispositif d'extinction de feu par injection d'un gaz genere par la combustion d'un bloc pyrotechnique | |
EP0106712B1 (fr) | Procédé et dispositif d'allumage électrique d'un brûleur oxycombustible | |
WO2010052434A2 (fr) | Systeme et procede de lavage et purge a l'eau du circuit combustible liquide d'une turbine | |
EP2885525B1 (fr) | Allumeur bimodal et procede d'injection bimodale pour allumeur de moteur-fusee | |
FR2599815A1 (fr) | Chalumeau coupeur | |
EP1869534B1 (fr) | Ensemble valve régulé pour systèmes d'extincteurs d'incendie | |
EP0895026B1 (fr) | Procédé de suppression de la déflagration à l'extinction d'une flamme de combustion | |
EP1113222B1 (fr) | Chalumeau oxy-combustible à organe de commande unique des valves et du système d'allumage | |
EP0010038B1 (fr) | Chalumeau à deux gaz | |
EP2282866A2 (fr) | Procede et installation d'oxycoupage d'une piece en acier avec augmentation de la pression et/ou du debit de l'oxygene gazeux apres amorcage du percage | |
EP3329108A1 (fr) | Isolation d'un reservoir de turbomachine d'aeronef en cas d'incendie par fermeture d'une vanne sensible a la liberation d'un agent extincteur | |
EP0031279B1 (fr) | Chalumeau à deux gaz muni d'un dispositif anti-inflammation interne | |
FR2697319A1 (fr) | Procédé et outil d'usinage thermique pour allumer un mélange gaz combustible-oxygène de chauffage capable de réduire l'émission de bruit à l'allumage. | |
FR3066804A1 (fr) | Robinet a detenteur integre et vanne de fermeture manuelle pour recipient de gaz | |
FR1464931A (fr) | Dispositif de commande du combustible pour appareil à brûleur principal et à brûleur-pilote | |
EP3425278B1 (fr) | Briquet apte à émettre deux flammes différentes en alternance | |
EP0743489A1 (fr) | Installation d'alimentation en gaz, équipement de mise en oeuvre d'une flamme la comportant, et détendeur correspondant | |
WO1996027762A1 (fr) | Dispositif de commande coordonnee de l'ecoulement d'au moins deux gaz, et brûleur le comportant | |
FR3129463A1 (fr) | Chaudière à combustible comprenant un dispositif de diminution de pression pour l’allumage de la flamme | |
FR2816524A1 (fr) | Installation manuelle de projection a la flamme notamment de poudres plastiques ou metalliques | |
FR3138492A1 (fr) | Réservoir de gaz inflammable sous pression | |
BE493743A (fr) | ||
FR2671138A1 (fr) | Systeme de conditionnement et d'allumage de moteur-fusee. | |
FR2517026A1 (fr) | Perfectionnements aux chalumeaux dits " a melange dans la tete " | |
FR2796132A1 (fr) | Chalumeau manuel d'oxycoupage comprenant un dispositif de surchauffe integre |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE DE ES FR GB IT NL |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
17P | Request for examination filed |
Effective date: 19990803 |
|
AKX | Designation fees paid |
Free format text: BE DE ES FR GB IT NL |
|
17Q | First examination report despatched |
Effective date: 20010514 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
RTI1 | Title (correction) |
Free format text: METHOD TO CONTROL DEFLAGRATION WHILE EXTINGUISHING A COMBUSTION FLAME |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE DE ES FR GB IT NL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20020515 Ref country code: GB Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20020515 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REF | Corresponds to: |
Ref document number: 69805372 Country of ref document: DE Date of ref document: 20020620 |
|
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
GBV | Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed] |
Effective date: 20020515 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2176932 Country of ref document: ES Kind code of ref document: T3 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20030218 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20040610 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20040621 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20040705 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20040713 Year of fee payment: 7 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050727 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050728 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050731 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060201 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060331 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20060331 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20050728 |
|
BERE | Be: lapsed |
Owner name: *LA SOUDURE AUTOGENE FRANCAISE Effective date: 20050731 |