EP0605278B1 - Nozzle and cutting torch - Google Patents

Nozzle and cutting torch Download PDF

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Publication number
EP0605278B1
EP0605278B1 EP19930403047 EP93403047A EP0605278B1 EP 0605278 B1 EP0605278 B1 EP 0605278B1 EP 19930403047 EP19930403047 EP 19930403047 EP 93403047 A EP93403047 A EP 93403047A EP 0605278 B1 EP0605278 B1 EP 0605278B1
Authority
EP
European Patent Office
Prior art keywords
insert
central
nozzle
torch body
cutting
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.)
Expired - Lifetime
Application number
EP19930403047
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German (de)
French (fr)
Other versions
EP0605278A1 (en
Inventor
Richard Soula
Jean-Christophe Charbonnel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Publication date
Application filed by Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP0605278A1 publication Critical patent/EP0605278A1/en
Application granted granted Critical
Publication of EP0605278B1 publication Critical patent/EP0605278B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F23D14/48—Nozzles
    • F23D14/52—Nozzles for torches; for blow-pipes
    • F23D14/54—Nozzles for torches; for blow-pipes for cutting or welding metal

Definitions

  • Document DE-C-552 240 describes a torch comprising a end part made up of several concentric screwed elements individually in a torch head connected to the body of the torch.
  • a body of torch 1 defining a central passage 2 for supplying oxygen to section and two longitudinal passages 3 and 4 for supplying the components of an oxy-fuel mixture.
  • the torch body 1 has one face flat transverse annular end 5, into which two concentric rings of conduits 6 and 7 forming the outlet for the supply passages 3 and 4, respectively.
  • a cutting nozzle comprising a concentric assembly of a central insert 9, a intermediate insert 10 and a peripheral annular block 11.
  • the central insert 9 comprises a profiled central passage in the form of Laval 12 nozzle for ejecting cutting oxygen and present, advantageously, a frustoconical external profile with a series of external longitudinal ribs 13 which are received in a housing internal, also frustoconical, of the intermediate nozzle 10, which has an outer profile which is also generally frustoconical with external longitudinal ribs 14 received in a housing corresponding internal unit of block 11.
  • Chamber 21 also communicates with the annular groove 17 by a series of passages 23 formed in the intermediate insert 10 and supplies the oxycombustible mixture with ducts of the external heating ring 50 between the insert 10 and block 11.
  • the internal housing of block 11 advantageously includes a annular shoulder 24 cooperating in axial support with shoulders corresponding to the ribs 14 of the intermediate insert 10.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Arc Welding In General (AREA)

Description

La présente invention concerne une buse de coupe destinée à être montée dans un corps de chalumeau comportant des passages d'amenée de fluides, la buse comprenant un conduit central profilé d'oxygène de coupe entouré par une couronne intermédiaire et une couronne extérieure de conduits de chauffe.The present invention relates to a cutting nozzle intended to be mounted in a torch body having supply passages fluids, the nozzle comprising a profiled central oxygen duct cut surrounded by an intermediate crown and an outer crown heating ducts.

Une buse de ce type est décrite dans le document FR-A-2.602.309, au nom de la Demanderesse. Une telle buse est constituée de l'assemblage d'un bloc de chauffe formant le conduit central d'oxygène de coupe et les conduits des couronnes intermédiaire et extérieure de chauffe et d'un bloc de raccordement à portées coniques, suivant un agencement nécessitant des usinages délicats et coûteux. La durée de fonctionnement des buses de coupe est par ailleurs directement liée à l'état de propreté du canal d'oxygène de coupe dont l'encrassement progressif provoque une baisse des performances et nécessite de ce fait un nettoyage quotidien par trempage dans un produit de nettoyage adapté; ce changement du bloc de chauffe oblige à un démontage complet de la buse, avec les inconvénients afférents de risques d'endommagement des portées coniques du bloc de raccordement. Enfin, selon les épaisseurs coupées et les paramètres de coupe, l'utilisateur doit disposer d'un éventail de blocs de chauffe différents.A nozzle of this type is described in document FR-A-2,602,309, at name of the Applicant. Such a nozzle consists of the assembly a heating block forming the central cutting oxygen duct and the ducts of the intermediate and outer heating rings and a block connection with tapered surfaces, in an arrangement requiring delicate and costly machining. The operating time of the nozzles cut is also directly linked to the cleanliness of the canal cutting oxygen whose progressive fouling causes a drop performance and therefore requires daily cleaning by soaking in a suitable cleaning product; this block change from heating requires complete disassembly of the nozzle, with the disadvantages risk of damage to the conical bearing surfaces of the connection. Finally, depending on the thicknesses cut and the parameters of the user must have a range of different heating blocks.

Le Document DE-C-552 240 décrit un chalumeau comprenant une partie d'extrémité constituée de plusieurs éléments concentriques vissés individuellement dans une tête de torche raccordée au corps du chalumeau.Document DE-C-552 240 describes a torch comprising a end part made up of several concentric screwed elements individually in a torch head connected to the body of the torch.

Le document US-A-2.302.734 décrit par ailleurs une buse de coupe constituée d'un bloc cylindrique dans lequel sont percés les conduits d'une couronne unique de chauffe entourant un insert formant deux conduits d'éjection d'oxygène de coupe emmanché à la presse dans le bloc.Document US-A-2,302,734 also describes a cutting nozzle consisting of a cylindrical block in which the conduits of a single heating ring surrounding an insert forming two conduits cutting oxygen ejection press fitted into the block.

La présente invention a pour objet de proposer une buse de coupe perfectionnée de coûts de fabrication et de revient considérablement réduits, de structure simple, compacte et modulaire, d'entretien et de maintenance facilités, permettant de réaliser aisément, et à moindre coûts, une gamme élargie de modèles différents.The object of the present invention is to provide a cutting nozzle improved considerably reduced manufacturing and production costs, simple, compact and modular structure, care and maintenance facilities, making it possible to easily and inexpensively produce a range expanded with different models.

Pour ce faire, selon l'invention, la buse comprend un sous-ensemble d'un insert central formant le conduit d'oxygène de coupe et d'un insert intermédiaire définissant en partie la couronne extérieure de conduits de chauffe et dans lequel est reçu l'insert central en formant avec ce dernier la couronne intermédiaire de conduits de chauffe, et comporte des moyens périphériques de montage dudit sous-ensemble dans le corps de chalumeau avec l'insert intermédiaire en appui axial contre le corps de chalumeau et une partie arrière de l'insert central reçue à coulissement dans le corps de chalumeau, ces moyens périphériques de montage assurant à eux seuls le montage de l'insert central et de l'insert intermédiaire.To do this, according to the invention, the nozzle comprises a sub-assembly a central insert forming the cutting oxygen conduit and an insert intermediate partially defining the outer ring of conduits heater and in which the central insert is received by forming with it the intermediate ring of heating conduits, and includes means devices for mounting said sub-assembly in the torch body with the intermediate insert in axial support against the torch body and a rear part of the central insert slidably received in the body of torch, these peripheral mounting means alone ensuring the mounting of the central insert and the intermediate insert.

Suivant une exécution particulière de l'invention :

  • l'insert central est sollicité élastiquement, en appui en position dans l'insert intermédiaire,
  • l'insert intermédiaire est reçu dans un bloc périphérique définissant en partie la couronne externe de conduits de chauffe et comportant des moyens de solidarisation au corps de chalumeau pour le montage de la buse dans le corps :
  • au moins une partie des conduits de chauffe des couronnes intermédiaire et extérieure sont délimités par des nervures longitudinales externes de l'insert central et de l'insert intermédiaire, respectivement.
According to a particular embodiment of the invention:
  • the central insert is elastically biased, bearing in position in the intermediate insert,
  • the intermediate insert is received in a peripheral block partially defining the outer ring of heating conduits and comprising means for securing to the torch body for mounting the nozzle in the body:
  • at least a portion of the heating conduits of the intermediate and outer rings are delimited by external longitudinal ribs of the central insert and the intermediate insert, respectively.

La présente invention a également pour objet de proposer un chalumeau d'oxycoupage, de structure simple et robuste, adapté pour recevoir une telle buse de coupe et dont le corps de chalumeau comporte notamment une face d'extrémité avant transversale dans laquelle débouchent les passages d'amenée de fluides et coopérant avec une face d'extrémité arrière transversale de l'insert intermédiaire de la buse de coupe.The present invention also aims to provide a flame cutting torch, simple and robust structure, suitable for to receive such a cutting nozzle and the torch body of which comprises in particular a transverse front end face in which open the fluid supply passages and cooperate with a face transverse rear end of the intermediate insert of the cutting nozzle.

D'autres caractéristiques et avantages de la présente invention ressortiront de la description suivante d'un mode de réalisation, donnée à titre illustratif, faite en relation avec le dessin annexé, sur lequel :

  • la figure unique est une vue schématique en coupe longitudinale d'une extrémité de chalumeau d'oxycoupage comportant une buse de coupe selon l'invention.
Other characteristics and advantages of the present invention will emerge from the following description of an embodiment, given by way of illustration, made in relation to the appended drawing, in which:
  • the single figure is a schematic view in longitudinal section of one end of the flame cutting torch comprising a cutting nozzle according to the invention.

Sur la figure unique, on reconnaít l'extrémité cylindrique d'un corps de chalumeau 1 définissant un passage central 2 d'amenée d'oxygène de coupe et deux passages longitudinaux 3 et 4 d'amenée des constituants d'un mélange oxycombustible. Le corps de chalumeau 1 comporte une face transversale plane d'extrémité annulaire 5, dans laquelle débouchent deux couronnes concentriques de conduits 6 et 7 formant le débouché des passages d'amenée 3 et 4, respectivement. In the single figure, we recognize the cylindrical end of a body of torch 1 defining a central passage 2 for supplying oxygen to section and two longitudinal passages 3 and 4 for supplying the components of an oxy-fuel mixture. The torch body 1 has one face flat transverse annular end 5, into which two concentric rings of conduits 6 and 7 forming the outlet for the supply passages 3 and 4, respectively.

Selon l'invention, sur le corps de chalumeau 1 est rapportée une buse de coupe, généralement désignée par la référence 8, comprenant un assemblage concentrique d'un insert central 9, d'un insert intermédiaire 10 et d'un bloc annulaire périphérique 11. L'insert central 9 comprend un passage central profilé en forme de tuyère de Laval 12 pour l'éjection de l'oxygène de coupe et présente, avantageusement, un profilé extérieur tronconique avec une série de nervures longitudinales externes 13 qui sont reçues dans un logement interne, également tronconique, de la buse intermédiaire 10, laquelle présente un profil extérieur également généralement tronconique avec des nervures longitudinales externes 14 reçues dans un logement interne correspondant du bloc 11. L'insert intermédiaire 10 comporte une face d'extrémité arrière transversale annulaire définissant au moins deux portées planes concentriques 15 et 16 délimitant intérieurement une gorge d'extrémité annulaire 17 et destinée à venir porter en appui étanche métal sur métal contre la face d'extrémité transversale 5 du corps de chalumeau 1. A cet effet, l'extrémité arrière de l'insert intermédiaire 10 fait légèrement saillie par rapport à l'extrémité arrière du bloc 11. L'insert central 9 comporte pour sa part une queue arrière 90 faisant saillie au-delà du plan des portées annulaires 15 et 16 de l'insert intermédiaire 10 et reçue à coulissement étanche dans le passage central d'amenée d'oxygène 2 du corps de chauffe 1.According to the invention, on the torch body 1 is attached a cutting nozzle, generally designated by the reference 8, comprising a concentric assembly of a central insert 9, a intermediate insert 10 and a peripheral annular block 11. The central insert 9 comprises a profiled central passage in the form of Laval 12 nozzle for ejecting cutting oxygen and present, advantageously, a frustoconical external profile with a series of external longitudinal ribs 13 which are received in a housing internal, also frustoconical, of the intermediate nozzle 10, which has an outer profile which is also generally frustoconical with external longitudinal ribs 14 received in a housing corresponding internal unit of block 11. The intermediate insert 10 comprises an annular transverse rear end face defining at minus two concentric flat spans 15 and 16 delimiting internally an annular end groove 17 and intended to come wear a metal-to-metal seal against the end face transverse 5 of the torch body 1. For this purpose, the end rear of the intermediate insert 10 protrudes slightly from relative to the rear end of the block 11. The central insert 9 comprises for its part a rear tail 90 projecting beyond the plane of the annular bearings 15 and 16 of the intermediate insert 10 and received at sealed sliding in the central oxygen supply passage 2 of the heating element 1.

Dans le mode de réalisation représenté sur la figure unique, le logement interne de l'insert intermédaire 10 forme un épaulement transversal 18 coopérant en appui axial avec des épaulements correspondants des nervures 13 et ménage, autour de la partie arrière de ces dernières, une chambre annulaire de mélange 19 communiquant avec la gorge annulaire 17 par des passages 20 formés dans l'insert intermédiaire 10 et alimentant les conduits de la couronne de chauffe intermédiaire 40 entre les inserts 10 et 9. Ce dernier est conformé pour ménager, à l'arrière de ses nervures externes 14, une chambre périphérique annulaire 21 communiquant avec une chambre annulaire de distribution 22 ménagée à l'arrière du bloc-écrou 11 et autour de la portée extérieure 16 de l'insert intermédiaire 10 et dans laquelle débouche la couronne de passages 6. La chambre 21 communique également avec la gorge annulaire 17 par une série de passages 23 formés dans l'insert intermédiaire 10 et alimente en mélange oxycombustible les conduits de la couronne de chauffe extérieure 50 entre l'insert 10 et le bloc 11. Le logement interne du bloc 11 comporte avantageusement un épaulement annulaire 24 coopérant en appui axial avec des épaulements correspondants des nervures 14 de l'insert intermédiaire 10.In the embodiment shown in the single figure, the internal housing of the intermediate insert 10 forms a shoulder transverse 18 cooperating in axial support with shoulders corresponding ribs 13 and cleaning, around the rear part of these, an annular mixing chamber 19 communicating with the annular groove 17 by passages 20 formed in the insert intermediate 10 and supplying the conduits of the heating ring intermediate 40 between the inserts 10 and 9. The latter is shaped to provide, behind its external ribs 14, a room annular peripheral 21 communicating with an annular chamber of distribution 22 arranged at the rear of the nut block 11 and around the outer surface 16 of the intermediate insert 10 and in which opens the crown of passages 6. Chamber 21 also communicates with the annular groove 17 by a series of passages 23 formed in the intermediate insert 10 and supplies the oxycombustible mixture with ducts of the external heating ring 50 between the insert 10 and block 11. The internal housing of block 11 advantageously includes a annular shoulder 24 cooperating in axial support with shoulders corresponding to the ribs 14 of the intermediate insert 10.

Selon un aspect de l'invention, et pour en permettre une extraction et une mise en place aisées, l'insert central ou insert de coupe 9 n'est pas monté fixé dans le logement interne de l'insert intermédiaire 10. Dans le mode de réalisation représenté, l'insert central 9 est maintenu plaqué en position dans l'insert intermédiaire 10, en configuration assemblée de la buse, par un piston 25 coulissant dans le passage central 2 du corps de chalumeau 1 et sollicité vers l'avant par un ressort 26. Avantageusement, le bloc périphérique 11 comporte une partie arrière filetée extérieurement et vissée dans un taraudage d'une jupe d'extrémité avant 30 du corps de chalumeau 1 dans laquelle se prolonge une chambre périphérique 27 délimitée par une chemise extérieure 28 et formant partie d'un circuit de refroidissement par fluide, par exemple d'eau, du chalumeau et d'au moins une partie de la buse de coupe.According to one aspect of the invention, and to allow a easy extraction and installation, the central insert or insert section 9 is not mounted fixed in the internal housing of the insert intermediate 10. In the embodiment shown, the insert central 9 is kept pressed in position in the intermediate insert 10, in assembled nozzle configuration, by a sliding piston 25 in the central passage 2 of the torch body 1 and urged towards the front by a spring 26. Advantageously, the peripheral block 11 has a rear part externally threaded and screwed into a tapping a front end skirt 30 of the torch body 1 in which is extended by a peripheral chamber 27 delimited by a outer jacket 28 and forming part of a circuit of fluid cooling, for example of water, of the torch and of minus part of the cutting nozzle.

L'agencement selon l'invention permet, du fait de la faible dimension de l'insert central de coupe 9, de réaliser un usinage très soigné de la tuyère 12, ce qui permet d'accroítre notablement les vitesses de coupe mais également de garantir plus facilement la reproductibilité de qualité d'usinage. La couronne intérieure de conduits de chauffe 40, définie par les fraisures entre les nervures 13, est directement adaptée au calibre de l'insert central 9 et dimensionnable indépendamment du reste de la buse 8. Cette conception permet d'utiliser des inserts centraux et intermédiaires de calibres différents pour une même buse. Cette dernière réalise également une répartition originale des gaz, le mélange oxycombustible s'effectuant directement dans la buse en amont des conduits des couronnes de chauffe intérieure et extérieure 40 et 50. D'autre part, l'insert central 9 peut être considéré comme une pièce d'usure et changé régulièrement ou, alternativement, être aisément interchangé pour en permettre le nettoyage lorsque son état d'encrassement le rend nécessaire. La mise en place de cet insert est extrêmement simplifiée et se limite au dévissage de la buse, au remplacement de l'insert et à la remise en place de la buse dans le corps de chalumeau.The arrangement according to the invention allows, due to the low dimension of the central cutting insert 9, to carry out a very careful of the nozzle 12, which allows to significantly increase the cutting speeds but also to more easily guarantee the machining quality reproducibility. The inner crown of heating ducts 40, defined by the countersinks between the ribs 13, is directly adapted to the size of the central insert 9 and dimensionable independently of the rest of the nozzle 8. This design allows the use of central and intermediate caliber inserts different for the same nozzle. The latter also performs a original gas distribution, the oxy-fuel mixture taking place directly in the nozzle upstream of the crown crown conduits interior and exterior heating 40 and 50. On the other hand, the insert central 9 can be considered as a wearing part and changed regularly or, alternatively, be easily interchanged to allow cleaning when its state of fouling makes it necessary. The installation of this insert is extremely simplified and is limited to unscrewing the nozzle, replacing the insert and replacing the nozzle in the torch body.

Claims (5)

  1. Cutting nozzle intended to be fitted into a torch body (1) having fluid supply passages (2-4), the nozzle (8) comprising: a profiled central cutting-oxygen duct (12) surrounded by an intermediate ring (40) and an outer ring (50) of heating ducts, characterized in that it comprises a subassembly (9-10) of a central insert (9) forming the cutting-oxygen duct (12) and of an intermediate insert (10) which partly defines the outer ring of heating ducts (50) and in which the central insert (9) is accommodated, forming with the latter the intermediate ring of heating ducts (40), and in that it includes peripheral means (11, 30) for fitting the said subassembly (9-10) into the torch body (1) with the intermediate insert (10) bearing axially against the torch body (1) and a rear part (90) of the central insert slidingly accommodated in the torch body (1), these peripheral fitting means (11, 30) by themselves ensuring that the central insert (9) and the intermediate insert (10) are fitted.
  2. Nozzle according to Claim 1, characterized in that, in the configuration in which it is fitted in the torch body (1), the central insert (9) is spring-loaded (26) so as to bear in position in the intermediate insert (10).
  3. Nozzle according to either of Claims 1 and 2, characterized in that the intermediate insert (10) is accommodated and positioned in a peripheral block (11) which partly defines the outer ring of heating ducts (50) and includes the means (30) for fitting it into the torch body (1).
  4. Nozzle according to one of the preceding claims, characterized in that at least some of the ducts of the intermediate ring (40) and of the outer ring (50) are bounded by external longitudinal ribs (13; 14) on the central insert (9) and intermediate insert (10), respectively.
  5. Nozzle according to one of the preceding claims, characterized in that the intermediate insert (10) has a transverse rear end face (15-16) which engages in sealed bearing contact with a transverse front end face (5) of the torch body (1), in which transverse front end face (5) the fluid supply passages (2, 3, 4, 6, 7) emerge.
EP19930403047 1992-12-29 1993-12-16 Nozzle and cutting torch Expired - Lifetime EP0605278B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9215823A FR2699989B1 (en) 1992-12-29 1992-12-29 Oxygen cutting nozzle and torch.
FR9215823 1992-12-29

Publications (2)

Publication Number Publication Date
EP0605278A1 EP0605278A1 (en) 1994-07-06
EP0605278B1 true EP0605278B1 (en) 2000-02-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930403047 Expired - Lifetime EP0605278B1 (en) 1992-12-29 1993-12-16 Nozzle and cutting torch

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EP (1) EP0605278B1 (en)
DE (1) DE69327782T2 (en)
ES (1) ES2144449T3 (en)
FR (1) FR2699989B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10144179C1 (en) * 2001-09-07 2003-04-17 Messer Cutting & Welding Gmbh Cutting torch with multifunctional torch head
DE10144177B4 (en) * 2001-09-07 2004-02-19 Messer Cutting & Welding Gmbh Cutting torch and suitable nozzle system for slow-burning and for fast-burning fuel gases

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE552240C (en) * 1932-06-11 Harry Toepper Underwater torch for oxy-fuel cutting and welding
GB138513A (en) * 1919-05-01 1920-02-12 Em Z Svitzer S Bjergnings Entp Improvements relating to autogenous cutting and welding under water
AT265820B (en) * 1963-08-17 1968-10-25 Messer Griesheim Gmbh Cutting torch
DE2832323A1 (en) * 1978-07-22 1980-02-07 Ipu Ltd Annular nozzle for cutting torch - with extra mixing chamber and outlet for extra annular flame
FR2602309B1 (en) * 1986-07-30 1988-11-10 Soudure Autogene Francaise STEEL CUTTING NOZZLE WITH DOUBLE HEATER CROWN

Also Published As

Publication number Publication date
DE69327782T2 (en) 2000-07-27
DE69327782D1 (en) 2000-03-09
FR2699989A1 (en) 1994-07-01
EP0605278A1 (en) 1994-07-06
FR2699989B1 (en) 1995-01-27
ES2144449T3 (en) 2000-06-16

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