EP0103651B1 - Buse courte pour oxycoupage au chalumeau ou décapage à la flamme - Google Patents

Buse courte pour oxycoupage au chalumeau ou décapage à la flamme Download PDF

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Publication number
EP0103651B1
EP0103651B1 EP82108584A EP82108584A EP0103651B1 EP 0103651 B1 EP0103651 B1 EP 0103651B1 EP 82108584 A EP82108584 A EP 82108584A EP 82108584 A EP82108584 A EP 82108584A EP 0103651 B1 EP0103651 B1 EP 0103651B1
Authority
EP
European Patent Office
Prior art keywords
bores
heating
tip
oxygen
flame
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
Application number
EP82108584A
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German (de)
English (en)
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EP0103651A1 (fr
Inventor
Horst K. Lotz
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.)
Cessione aute AG Gesellschaft fur Autogene Techni
Original Assignee
Aute AG Gesellschaft fuer Autogene Technik
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8189233&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0103651(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Aute AG Gesellschaft fuer Autogene Technik filed Critical Aute AG Gesellschaft fuer Autogene Technik
Priority to DE8282108584T priority Critical patent/DE3275858D1/de
Priority to EP82108584A priority patent/EP0103651B1/fr
Priority to AT82108584T priority patent/ATE26165T1/de
Publication of EP0103651A1 publication Critical patent/EP0103651A1/fr
Application granted granted Critical
Publication of EP0103651B1 publication Critical patent/EP0103651B1/fr
Expired 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

  • the invention relates to a round or flat short nozzle for flame cutting or flaming workpieces made of steel or the like with a feed channel for the cutting or flame oxygen and at least one, preferably two rings or rings arranged symmetrically to the central axis or central plane of the feed channel or rows of heating mixing holes on both sides , whereby dosing bores with a dosing cross-section depart from annular distribution channels for heating gas and heating oxygen and run on each side of the nozzle and open into the heating mixing bores with a mixing cross-section.
  • Nozzles of various types are already known, in which a round supply channel for the cutting oxygen is provided in a round design or, in a flat embodiment, the flame oxygen exits in the middle.
  • a round nozzle it is known to arrange a central supply channel for the ring-shaped heating bores (DE-A-25 47 475).
  • Such a round nozzle as also in a flat embodiment, has to meet a wide variety of requirements, which, however, have so far been unsatisfactory. For example, in the case of a nozzle for cutting, a high cutting speed with a small kerf is desirable.
  • the known nozzles are usually optimized in one direction or the other or aligned to specific operating conditions.
  • a large cross-section was provided for heavy cutting because of the required amounts of cutting oxygen, which must be supplied at a sufficiently high speed.
  • nozzles were developed in which the supply channel for the cutting oxygen in the sense of Laval nozzles is equipped with a constriction that gradually builds up and decreases again (DE-A-26 33 719).
  • the oxygen supply channel is narrowed by a gradual transition (US Pat. No. 3,788,558). This is to achieve a gas flow in which pressure loss is avoided as far as possible.
  • the invention is based on the object of making a short nozzle for the thermochemical machining of steel or the like available, which is improved with an optimal design of the heating system and in particular the feed channel for the cutting or flame oxygen while saving material and gas consumption, and one cheaper manufacturing allowed.
  • the invention consists in a short nozzle of the type mentioned in that the feed channel has an input section with a sharp, sudden, almost seamless narrowing in a central section to a metering cross section of 1 to 4 mm in diameter or height with a short length of less than 10 mm and has an adjoining exit section with a uniform or multi-stage expansion to an outlet of 2 to 6 mm.
  • An advantageous embodiment consists in that at least one ring or at least one row of heating mixing bores extends at an angle to the feed channel at an angle.
  • the external heating mixing bores advantageously run at an angle of 4 to 5 ° to the nozzle axis.
  • the total length of the nozzle body is about 30 mm.
  • the nozzle With this nozzle not only a remarkably cheap heating is achieved, but also an improved stability of the heating jet.
  • this makes it possible to choose a large nozzle distance, which reduces wear and significantly increases the service life of the nozzle.
  • the nozzle enables flying cutting with a short heating time and a high cutting speed. That means not only a time saving, but additional. Measures such as iron powder, ignition wheels or preheating burners are superfluous, and the edge position is no longer a problem with the nozzle.
  • the quick heating-up time significantly increases the service life, since the nozzle is not exposed to heat radiation when heating for a longer period of time, and the entire flame process is well supported.
  • the stable gas jet creates a very good surface of the workpiece when it is burned and ensures that there is a small material gap with a high one when flame cutting Cutting speed.
  • a short nozzle for cutting is shown.
  • a cutting oxygen supply channel 2 is provided in the center, which is surrounded by mixed fuel gas bores 11 running in parallel.
  • oxygen heating mixing bores 7 are arranged, which run at an angle a obliquely to the outlet end of the heating mixing bores 11 and emerge directly next to them.
  • the oxygen heating mixing holes 7 run at an angle a of 4 ° to 5 ° to the nozzle axis.
  • the heating mixing bores 7 have an annular distributor ring channel 4, into which a heating oxygen supply 5 opens, which is not shown in detail.
  • the heating oxygen metering bore 6 has a diameter of approximately 1 mm, while the oxygen heating mixing bore has a diameter of 2.3 mm.
  • an annular fuel gas distribution ring channel 3 is provided, into which a fuel gas supply 8, not shown, opens.
  • a fuel gas connecting bore 9 runs obliquely from the fuel gas distributor ring channel 3 to the oxygen heating mixed bore 7 and opens into the latter at the upper end.
  • This fuel gas connection bore 9 also has a diameter of 1 mm.
  • Fuel gas feeds 8 open into the annular fuel gas distributor ring channels 3.
  • fuel gas can pass from the fuel gas distributor ring channels 3 through fuel gas metering bores 10 into the fuel gas heating mixing bores 11.
  • the fuel gas metering holes 10 have a diameter of 1.3 mm.
  • the fuel gas heating mixing bore 11, on the other hand, has a diameter of 2.3 mm, like the oxygen heating mixing bore.
  • a heating oxygen connecting bore 12 runs from the heating oxygen distribution ring channel 4 to the fuel gas / heating mixing bore 11.
  • the heating oxygen connecting bore 12 has a metering section 13 with a reduced cross section, which is approximately 0.5 mm.
  • the cutting oxygen supply channel 2 consists of an input section 14, a narrowed central section 15 and a conically widening output section 16.
  • the input section 14 of the cutting oxygen supply channel 2 has a diameter of 5 mm, while the subsequent narrowed central section has a diameter of 2 mm. 6 via 3.25 mm.
  • the outlet section 16 of the cutting oxygen feed channel 2 has an outlet diameter of 4.3 mm, the outlet bore expanding at an angle ⁇ to the central axis of the nozzle body of 7 °.
  • the nozzle designed for flame cutting achieves an optimally small kerf at a very high cutting speed. Due to the favorable heat development, which also enables a high cutting speed, an optimal slag flow is made possible, so that only comparatively small slag whiskers are formed, and the entire cutting surface is significantly improved. By increasing the nozzle spacing from the usual 60 mm to 120 mm, the life of the nozzles is significantly extended. On the other hand, a quick nozzle change is possible and thus easy maintenance.
  • the nozzle whose basic body length L of the nozzle body is 30 mm, requires a relatively small amount of material and can therefore also be regarded as inexpensive.
  • the nozzle is characterized by low noise and also low consumption.
  • the invention makes available a nozzle with unique optimization of the various requirements that are currently being put to flame cutting.
  • the operating pressures are 10 to 16 bar for the cutting oxygen, about 2.5 bar for heating oxygen and 0.6 bar for the propane fuel gas.
  • a short nozzle for flaming is shown, which corresponds in principle to the nozzle of FIG. 1, as can be seen from the corresponding reference numerals.
  • On the nozzle body 1 ' is on the Exit end opposite side of a closure plate 20 mounted by brazing or other suitable means.
  • a ring 21 can also be attached to the base body 1 ', on which the closure plate 20 can also rest.
  • a slot-shaped oxygen supply channel 2 ' is formed in the middle, which runs perpendicular to the plane of the drawing and has an input section 14' which merges into a narrowed central section 15 'and which is followed by a conically widening output section 16'.
  • This output section can also be designed to be gradually expanded.
  • the entry section 14 ' is not gripped by the closure plate 20, so that the entry section 14 is accessible for a flame oxygen supply, not shown.
  • the closure plate 20 has a plurality of fuel gas feeds 8 'through which the fuel gas can pass into the transverse fuel gas distributor transverse channels 3'.
  • fuel gas metering bores 10 ' enter the fuel gas heating mixing bores 11', and in a corresponding manner, heating oxygen passes through the oxygen supply bores 5 'in the closure plate 20 into the transverse heating oxygen distribution transverse channels 4' and through heating oxygen metering bores 6 ' the oxygen heating mixing holes 7 '.
  • a fuel gas connection hole 9 ' which leads from the fuel gas distribution channel 3' into the oxygen heating mixing hole 7 ', fuel gas enters the oxygen heating mixing hole 7' in a metered manner, while the heating oxygen connection hole 12 'heating oxygen from the heating oxygen distribution channel 4 'of the fuel gas heating mixing bore 11'.
  • the nozzle body 1 ' also has a length L of approximately 30 mm.

Landscapes

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

Claims (15)

1. Buse courte, ronde ou plate, pour oxycoupage ou décapage à la flamme de pièces ou analogues, avec un canal d'alimentation (2 ; 2') pour l'oxygène de coupage ou de décapage à la flamme et au moins un, de préférence deux anneaux, ou des rangées bilatérales, d'alésages (7 ; 7') pour le mélange de chauffage, disposés symétriquement par rapport à l'axe médian ou au plan médian du canal d'alimentation (2 ; 2') et où à partir des canaux (3, 4 ; 3', 4') de répartition pour le gaz de chauffage et l'oxygène de chauffage disposés en anneaux ou de chaque côté de la buse, s'étendent des alésages de dosage (10 et 6 ; 10' et 6') avec une section transversàle de dosage débouchant dans les alésages (7, 11 ou 7', 11') pour le mélange de chauffage avec une section transversale de mélange, caractérisé en ce que, le canal d'alimentation possède un tronçon d'entrée (14, 14') avec un rétrécissement fortement marqué, brusque, presque sans transition avec un tronçon médjan (15, 15') de section transversale de dosage (15 ; 15') de 1 à 4 mm de diamètre ou d'hauteur, sur une faible longueur inférieure à 10 mm, et à la suite, un tronçon de sortie (16; 16') avec un élargissement régulier (angle β) ou polyétagé jusqu'à une largeur de sortie de 2 à 6 mm.
2. Buse courte selon la revendication 1, caractérisée en ce qu'au moins un anneau, ou au moins une rangée par côté, d'alésages (7 ; 7') pour le mélange de chauffage, s'étend obliquement sous un angle (α) par rapport au canal d'alimentation (2 ; 2').
3. Buse courte selon la revendication 1, carac- térisëe en ce que, lorsqu'il est prévu deux anneaux d'alésages (7, 11) pour le mélange de chauffage ou, par côté, deux rangées d'alésages (7', 11') pour le mélange de chauffage, l'anneau situé à l'extérieur ou les rangées situées à l'extérieur sont dirigés obliquement par rapport au canal d'alimentation (2 ; 2') tandis que l'anneau situé à l'intérieur ou les rangées situées à l'intérieur sont dirigés parallèlement à ce canal.
4. Buse courte selon la revendication 3, caractérisée en ce que des canaux de liaison (9, 12 ; 9', 12') ayant une section transversale de dosage partent des canaux (3, 4 ; 3', 4') de répartition dans la zone des alésages (7, 11 ; 7', 11') pour le mélange de chauffage de l'anneau voisin ou de la rangée voisine.
5. Buse courte selon une quelconque des revendications 1 à 4, caractérisée en ce que les alésages (7 ; 7') pour le mélange de chauffage situés à l'extérieur sont dirigés sous un angle (a) de 4 à 5° par rapport à l'axe de la buse.
6. Buse courte selon une quelconque des revendications 1 à 5, caractérisée en ce que l'alésage de dosage pour l'oxygène de chauffage (6 ; 6') a un diamètre d'environ 1 mm.
7. Buse courte selon une quelconque des revendications 1 à 6, caractérisée en ce que les alésages (7, 11 ; 7', 11') pour le mélange de chauffage ont un diamètre de 2,3 mm.
8. Buse courte selon une quelconque des revendications 4 à 7, caractérisée en ce que les canaux de liaison (9 ; 9') partant du canal (3 ; 3') de répartition de gaz de chauffage sont dirigés obliquement par rapport à l'alésage extérieur (7) pour le mélange de chauffage et ont un diamètre d'environ 1 mm.
9. Buse courte selon une quelconque des revendications 1 à 8, caractérisée en ce que les alésages de dosage (10 ; 10') partant du canal (3 ; 3') de répartition de gaz combustible ont un diamètre d'environ 1,3 mm.
10. Buse courte selon une quelconque des revendications 4 à 9, caractérisée en ce que les canaux de liaison (12 ; 12') partant du canal (4 ; 4') de répartition d'oxygène de chauffage présentent un tronçon (13) qui possède un diamètre de dosage de 0,5 mm.
11. Buse courte selon une quelconque des revendications 1 à 10, caractérisée en ce que le canal d'alimentation (2) pour l'oxygène de coupage présente dans le tronçon d'entrée (14) un diamètre d'environ 5 mm, dans le tronçon médian (15) plus étroit qui lui fait suite un diamètre de 1,8 à 2,6 mm et dans le tronçon de sortie (16) allant en s'élargissant un diamètre de sortie de 4,3 mm.
12. Buse courte selon une quelconque des revendications 1 à 10, caractérisée en ce que le canal d'alimentation (2') pour l'oxygène de décapage à la flamme présente dans le tronçon d'entrée (14') une hauteur de 3 à 6 mm, dans le tronçon médian (15') plus étroit une hauteur de fente de 2 à 4 mm et dans le tronçon de sortie (16') allant en s'élargissant une fente de sortie de 3 à 5 mm.
13. Buse courte selon la revendication 11 ou 12, caractérisée en ce que le tronçon de sortie (16 ; 16') du canal d'alimentation (2 ; 2') va en s'élargissant sous un angle (B) d'environ 7° par rapport à l'axe de la buse.
14. Buse courte selon une quelconque des revendications 1 à 13, caractérisée en ce que la longueur du corps de base de la buse (L) est d'environ 30 mm.
15. Buse courte selon une quelconque des revendications 1 à 14, caractérisée en ce que les canaux de répartition (3', 4') s'étendant de chaque côté de la buse sont fermés par une plaque de fermeture (20) contenant des trous d'alimentation (5', 8').
EP82108584A 1982-09-17 1982-09-17 Buse courte pour oxycoupage au chalumeau ou décapage à la flamme Expired EP0103651B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8282108584T DE3275858D1 (en) 1982-09-17 1982-09-17 Short tip for flame cutting or flame priming
EP82108584A EP0103651B1 (fr) 1982-09-17 1982-09-17 Buse courte pour oxycoupage au chalumeau ou décapage à la flamme
AT82108584T ATE26165T1 (de) 1982-09-17 1982-09-17 Kurzduese zum brennschneiden oder flaemmen.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP82108584A EP0103651B1 (fr) 1982-09-17 1982-09-17 Buse courte pour oxycoupage au chalumeau ou décapage à la flamme

Publications (2)

Publication Number Publication Date
EP0103651A1 EP0103651A1 (fr) 1984-03-28
EP0103651B1 true EP0103651B1 (fr) 1987-03-25

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ID=8189233

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82108584A Expired EP0103651B1 (fr) 1982-09-17 1982-09-17 Buse courte pour oxycoupage au chalumeau ou décapage à la flamme

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EP (1) EP0103651B1 (fr)
AT (1) ATE26165T1 (fr)
DE (1) DE3275858D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2602309B1 (fr) * 1986-07-30 1988-11-10 Soudure Autogene Francaise Buse de coupe siderurgique a double couronne de chauffe
BR8707994A (pt) * 1987-09-02 1990-05-22 Aga Ab Metodo para gerar uma chama ocidante,queimador e uso para um queimador

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2547475A1 (de) * 1975-10-23 1977-05-05 Ipu Ltd Duese zum schweissen, heizen, flaemmen, schneiden und verfahren zum schneiden

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5236107B2 (fr) * 1971-10-27 1977-09-13
DE2633719C2 (de) * 1976-07-27 1986-06-26 Linde Ag, 6200 Wiesbaden Verfahren zum Betreiben eines Schneidbrenners und Düse zur Durchführung des Verfahrens

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2547475A1 (de) * 1975-10-23 1977-05-05 Ipu Ltd Duese zum schweissen, heizen, flaemmen, schneiden und verfahren zum schneiden

Also Published As

Publication number Publication date
ATE26165T1 (de) 1987-04-15
EP0103651A1 (fr) 1984-03-28
DE3275858D1 (en) 1987-04-30

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