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EP0599709B2 - Plasma-Schneidbrenner - Google Patents

Plasma-Schneidbrenner Download PDF

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Publication number
EP0599709B2
EP0599709B2 EP93402814A EP93402814A EP0599709B2 EP 0599709 B2 EP0599709 B2 EP 0599709B2 EP 93402814 A EP93402814 A EP 93402814A EP 93402814 A EP93402814 A EP 93402814A EP 0599709 B2 EP0599709 B2 EP 0599709B2
Authority
EP
European Patent Office
Prior art keywords
series
torch
passages
passage
unitary
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
EP93402814A
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English (en)
French (fr)
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EP0599709B1 (de
EP0599709A1 (de
Inventor
Michel Delzenne
André Borne
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.)
Lincoln Electric Company France SA
Original Assignee
La Soudure Autogene Francaise
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by La Soudure Autogene Francaise filed Critical La Soudure Autogene Francaise
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Publication of EP0599709B1 publication Critical patent/EP0599709B1/de
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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H05H1/3489—Means for contact starting

Definitions

  • the present invention relates to cutting torches plasma, of the type comprising a torch body comprising an electrode and a nozzle, and means mounting and connecting the torch body.
  • Plasma cutting torches typically include a monobloc torch body with, at the back connections to supply lines in fluid and electrical energy and fixing means on a frame or a working machine, and in the front, means for mounting the electrode and the nozzle. Disassembly of these torches, for maintenance operations or replacement of worn or defective parts, requires disassembly operations and winding delicate and long, which immobilize the production machine for a long time and which most often oblige to proceed to new torch positioning settings before reviving the production.
  • GB-A-2091594 discloses a modular torch comprising a received cathode subassembly in a nozzle subassembly, these two subassemblies being arranged prisoners in a subset of box in several parts.
  • US-A-4,756, 686 teaches a manual brazing torch or the like comprising a ball cage mechanism for to allow a connection of the nozzle on the torch body.
  • EP-A-326,445 describes a plasma arc torch on which just plug in a cartridge made of a electrode and a nozzle.
  • the cartridge is fixed in the torch body via a cage type mechanism.
  • the object of the present invention is to propose a new torch architecture, modular design, allowing a quick and easy replacement of the body torch and / or its constituent elements and suppressing positioning re-adjustment problems after reassembly.
  • the torch comprises a torch holder comprising a first series of fluid passages connectable to respective circuits supplying said fluids and a first face of support, a unitary set of torch bodies comprising an electrode and a nozzle and having a second set of fluid passages and a second support face, and assembly means for assembling quickly the unitary set of torch body and the torch stand, with the first and second bearing faces in axial support against each other and with the passages from the first series communicating with the respective passages of the second series as defined in claims 1, 2 or 3.
  • FIG. 4 is a longitudinal sectional view of an embodiment of a torch according to the invention.
  • a plasma cutting torch comprises, in general, a torch holder A, intended to be mounted on a machine frame and on a end of which is mounted a unitary set of torch body B, the torch holder A comprising, at its opposite end, a series C of connecting elements to fluid lines and lines electric.
  • the torch holder A has a block metal 1, typically made of brass, having a succession of stepped bores of different diameters 2. 3, 4, 5 and surrounded by an insulating envelope 6.
  • Connection between bores 2 and 3 form an annular face transverse 9 in which a passage opens supplying a second actuating gas 10.
  • a passage 11 of supply of a third actuating gas In the bottom of the bore 4 is mounted an electrical contact socket 5, the bore 4 communicating with a tubing T of gas supply plasma.
  • Support A has, at its end before, a metal sleeve 12 isolated from the block 1 and comprising an external thread 13.
  • the torch body B comprises a metal tubular assembly 14 comprising a rear part forming a sliding piston 15 in an internal bore 16 of a metallic tubular jacket 17 provided with peripheral seals and intended to be received in the first bore 2 of the support of torch A.
  • the shirt 17 is secured to a set lower skirt 18 whose upper end forms a flange 19 extending radially outwardly.
  • On the lower end of the skirt set 18 is mounted a cap 20.
  • the tubular assembly 14 is extended rearwards by a stepped cylindrical part intended to be received sealingly in the bores rear 3 and 4 of the torch holder A.
  • the rear end of the liner 17 forms an annular bearing surface 21 coming against the annular face 9 of the support torch A.
  • tubular assembly 14 In the tubular assembly 14 is mounted sealingly a tubular element 22 enclosing a spring 23 urging downward on a sliding piston 24 in a sealed manner in the tubular element 22 and secured a hollow rod 25 extending with a leaktight sliding in the tubular element 22 and in a tubular extension 33 of the assembly 14, and carrying, at its end lower, a longitudinal tongs clamp structure flexible means 26 forming locking means and maintaining a hollow electrode tail 27 carrying its lower end a hollow electrode 28.
  • the clip structure 26 cooperates with a clip lock outer tubular 29 slidably mounted on the rod 25 and resiliently biased downwards by a spring 30.
  • the latch 29 has at least one transverse protrusion 31 through an oblong slot 32 formed in the tubular extension 33 of the assembly 14 and carrying, at its lower end, a clamp structure 34 with cooperating flexible longitudinal tongues with a peripheral elastic ring 35 and forming means for holding and blocking a nozzle 36 in which extends the electrode 28 and provided centrally a plasma jet ejection channel 37.
  • the plasma gas introduced into the bore 4 crosses the torch body B centrally in the electrode 28 from which it passes inside the nozzle 36.
  • the cooling gas introduced into the passage 7 penetrates, through transverse openings 38 into the shirt 17 to flow into the skirt 20, around the nozzle 36.
  • a locking gas, introduced through passage 8, penetrates through transverse openings 39, in the bore 16 to push back the piston 15 up and hold the clamps 26 and 34 in the configuration engagement of electrode tail 27 and the nozzle 36, respectively.
  • the upper part 40 of the assembly 14 forms, in the bore 3, an unlocking piston which, when unlocking gas is introduced into the bottom of the bore 3 through the passage 11, pushes the assembly 14 downward, thus releasing the clamp structure 34 of the ring 35 and allowing the extraction of the nozzle 36.
  • the projections 31 abut on an internal shoulder 41 of the sleeve 17, thus releasing the clip 26 and allowing the release of the electrode 28.
  • the electrode 28 is normally kept pressed against the bottom of the nozzle 36 by the spring 23.
  • priming gas is introduced through the passage 10 and enters through passages transverse, 42 between the set 14 and the set 22 into an annular chamber 43 in front piston 24 to push the latter against the spring 23 and thus discard the electrode 28 of the nozzle 36 for, at first, to start the bow and, by following, allow the escape of the plasma gas since inside the nozzle 36 to the outside, through the passage 37.
  • the torch body B is kept locked on the support A by a nut 70 cooperating with the flange 19 and screwed on the thread 13 of the support A, a simple unscrewing of the nut D allowing to extract the torch body assembly B for a quick replacement of the latter.
  • the insulating envelope 6 and the metal block 1 of the Torch support A which has, here, a lower face flat transverse 9 forming support for the bottom 21 of a ball cage 45 forming the rear end of a block 46 of the torch body B which encloses a structure of hollow electrode 280 protruding rearward and on the lower end or front of which is mounted the nozzle 36 surrounded here in a sealed manner by a skirt 20 'defining part of a cooling circuit water, the water being introduced into a longitudinal passage 47 in block 1, passing through a passage 48, aligned with the passage 47, in the block 46, into the cap 20 'to pass, via transverse passages 49, inside the electrode structure 280 and come out up block 1 through an exit passage 50.
  • the electrode structure 280 extends upward, beyond of the face 21, in a central stepped bore 51 of the block 1 having an electrical contact socket 52.
  • the electrode structure 280 further forms a structure intermediate piston 53 sliding in a bore central block 46, the front face of the piston 53 receiving, by aligned passages 54 in block 1 and 55 in block 46, a priming gas to move the electrode 280 of the nozzle 36, a defusing gas being introduced, by a passage opening, in 56, on the face rear of the piston 53 to bring back, at the end of use and at the beginning of reuse, the electrode 280 in contact with the nozzle 36 where the plasma gas arrives through passages opening radially, at 57, in the nozzle 36.
  • the passages of fluids, such as 48 and 55, of the torch body B comprise sockets, such as 58 and 59, projecting beyond of the face 21 and received sealed in the passages corresponding, such as 54, of the torch holder.
  • the socket 58 of the cooling water supply circuit cooperates with a hollow rod 60 arranged in the passage supply of water 47 to repel, in use, a shutter valve 61 biased elastically in position closure.
  • the passage water outlet 50 comprises, at the outlet, a key 62 normally elastically biased towards its position closing and open, in assembled configuration, by the upper, hollow end of the electrode structure 280. In this way, by disconnecting the body from torch B of the torch holder A, the valves 61 and 62 are close, thus avoiding the flow of water since torch bracket A.
  • the cage 45 carries at least one ball 63 intended to cooperate, in blocking position, with an annular groove 64 formed at the periphery of the cylindrical front end from block 1 and with a sliding cylindrical lock 65, forming a ramp, arranged in a chamber of the end before the insulating casing 6 and urged in position locking by a spring 66.
  • the torch body B has a sliding pusher 67 allowing to retract the lock 65, against the spring 66, when of set up, by simple plugging, and extraction Torch body B.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Plasma Technology (AREA)
  • Arc Welding In General (AREA)

Claims (12)

  1. Plasma-Schneidbrenner, der Folgendes umfasst:
    eine Brennerfassung (A), die einen Metallblock (1) mit einer erste Reihe von Fluiddurchläufen (7, 8, 10, 4, 47, 50, 54), die mit jeweiligen Kreisläufen der Fluida verbunden werden können, und einer ersten Auflagefläche (9) umfasst;
    ein einheitliches Brennerkörperbauteil (B), das eine Elektrode (28, 280) enthält und eine Düse (36) und eine zweite Reihe von Fluiddurchläufen (25, 27, 38, 39, 42, 48, 49, 55, 56) und eine zweite Auflagefläche (21) umfasst; und
    Montagemittel (D) zum schnellen Montieren des einheitlichen Brennerkörperbauteils an der Brennerfassung, wobei die erste und die zweite Auflagefläche axial zueinander aufliegen und die Durchläufe der ersten Reihe mit den jeweiligen Durchläufen der zweiten Reihe in Verbindung stehen,
    dadurch gekennzeichnet, dass die Montagemittel (D) vom Schnellverriegelungstyp mittels Kugelkäfig (45, 63, 65) sind und der Käfig (45) mindestens eine Kugel (63) trägt, die in der Blockierposition mit einer ringförmigen Kehle (64), die in der Nähe des vorderen zylindrischen Endes des Blocks (1) ausgebildet ist, und mit einem zylindrischen Schieberiegel (65) zusammenwirken soll, eine Rampe gebildet wird, die in einer Kammer des vorderen Endes eines Isolierstoffgehäuses (6), das den Block (1) umgibt, angeordnet ist und in der Verriegelungsposition durch eine Feder (66) beansprucht wird, und der Brennerkörper (B) einen Schiebestößel (67) umfasst, der das Zurücksetzen des Riegels (65) in seine Position gegenüber der Feder (66) durch Einstecken und Entfernen des Brennerkörpers (B) ermöglicht.
  2. Plasma-Schneidbrenner, der Folgendes umfasst:
    eine Brennerfassung (A), die eine erste Reihe von Fluiddurchläufen (7, 8, 10, 4, 47, 50, 54), die mit jeweiligen Kreisläufen der Fluida verbunden werden können, und eine erste Auflagefläche (9) umfasst;
    ein einheitliches Brennerkörperbauteil (B), das eine Elektrode (28, 280) enthält und eine Düse (36) und eine zweite Reihe von Fluiddurchläufen (25, 27, 38, 39, 42, 48, 49, 55, 56) und eine zweite Auflagefläche (21) umfasst; und
    Montagemittel (D) zum schnellen Montieren des einheitlichen Brennerkörperbauteils an der Brennerfassung, wobei die erste und die zweite Auflagefläche axial zueinander aufliegen und die Durchläufe der ersten Reihe mit den jeweiligen Durchläufen der zweiten Reihe in Verbindung stehen,
    wobei mindestens einer der Fluiddurchläufe der zweiten Reihe einen Abschlussteil (40, 58, 59) umfasst, der in Bezug auf die zweite Auflagefläche (21) hervorsteht und in einer Aussparung (3; 47, 54) der Brennerfassung (A), die einen Teil eines Durchlaufs der ersten Serie definiert, aufgenommen werden soll,
    die erste und die zweite Reihe von Durchläufen jeweils mindestens einen Kühlflüssigkeitsdurchlauf (7, 38; 47, 50, 48, 55) umfassen,
    der Kühlungsdurchlauf (47; 50) der ersten Reihe von Durchläufen mindestens ein Ventil (61; 62) enthält, das vom hervorstehenden Abschlussteil (58; 280) eines Durchlaufs der zweiten Reihe von Durchläufen betätigt werden kann.
  3. Plasma-Schneidbrenner, der Folgendes umfasst:
    eine Brennerfassung (A), die eine erste Reihe von Fluiddurchläufen (7, 8, 10, 4, 47, 50, 54), die mit jeweiligen Kreisläufen der Fluida verbunden werden können, und eine erste Auflagefläche (9) umfasst;
    ein einheitliches Brennerkörperbauteil (B), das eine Elektrode (28, 280) enthält und eine Düse (36) und eine zweite Reihe von Fluiddurchläufen (25, 27, 38, 39, 42, 48, 49, 55, 56) und eine zweite Auflagefläche (21) umfasst; und
    Montagemittel (D) zum schnellen Montieren des einheitlichen Brennerkörperbauteils an der Brennerfassung, wobei die erste und die zweite Auflagefläche axial zueinander aufliegen und die Durchläufe der ersten Reihe mit den jeweiligen Durchläufen der zweiten Reihe in Verbindung stehen,
    dadurch gekennzeichnet, dass das einheitliche Brennerkörperbauteil (B) mindestens einen Kolben (24; 53) zum Versetzen der Elektrode (28, 280) in Bezug auf die Düse (36) enthält, wobei die erste und die zweite Reihe von Durchläufen jeweils mindestens einen Gasdurchlauf (10; 42; 54; 55, 56) zur Betätigung des Kolbens umfassen.
  4. Brenner nach Anspruch 1 oder 3, dadurch gekennzeichnet, dass mindestens einer der Fluiddurchläufe der zweiten Reihe einen Abschlussteil (40, 58, 59) umfasst, der in Bezug auf die zweite Auflagefläche (21) hervorsteht und in einer Aussparung (3; 47, 54) der Brennerfassung (A), die einen Teil eines Durchlaufs der ersten Serie definiert, aufgenommen werden soll.
  5. Brenner nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die erste und die zweite Reihe von Durchläufen jeweils einen Plasmagasdurchlauf (4; 57) umfassen.
  6. Brenner nach Anspruch 1 oder 3, dadurch gekennzeichnet, dass die erste und die zweite Reihe von Durchläufen jeweils mindestens einen Kühlflüssigkeitsdurchlauf (7, 38; 47, 50, 48, 55) umfassen.
  7. Brenner nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das einheitliche Brennerkörperbauteil (B) mindestens einen Kolben (24; 53) zum Versetzen der Elektrode (28, 280) in Bezug auf die Düse (36) enthält, wobei die erste und die zweite Reihe von Durchläufen jeweils mindestens einen Gasdurchlauf (10; 42; 54; 55, 56) zur Betätigung des Kolbens umfassen.
  8. Brenner nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das einheitliche Brennerkörperbauteil (B) ein erstes durch Fluid betätigtes Mittel (26, 15) zum Entriegeln der Elektrode (28) enthält.
  9. Brenner nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das einheitliche Brennerkörperbauteil (B) ein zweites durch Fluid betätigtes Mittel (34, 15) zum Entriegeln der Düse (36) enthält.
  10. Brenner nach Anspruch 6, dadurch gekennzeichnet, dass der Kühlungsdurchlauf (47; 50) der ersten Reihe von Durchläufen mindestens ein Ventil (61; 62) enthält, das vom hervorstehenden Abschlussteil (58; 280) eines Durchlaufs der zweiten Reihe von Durchläufen betätigt werden kann.
  11. Brenner nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, dass die Montagemittel (D) eine Mutter (70) enthalten.
  12. Brenner nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, dass die Montagemittel (D) vom Schnellverriegelungstyp mittels Kugelkäfig (45, 63, 65) sind.
EP93402814A 1992-11-20 1993-11-19 Plasma-Schneidbrenner Expired - Lifetime EP0599709B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9213955A FR2698301B1 (fr) 1992-11-20 1992-11-20 Torche de coupage plasma.
FR9213955 1992-11-20

Publications (3)

Publication Number Publication Date
EP0599709A1 EP0599709A1 (de) 1994-06-01
EP0599709B1 EP0599709B1 (de) 1997-06-04
EP0599709B2 true EP0599709B2 (de) 2005-04-06

Family

ID=9435735

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93402814A Expired - Lifetime EP0599709B2 (de) 1992-11-20 1993-11-19 Plasma-Schneidbrenner

Country Status (7)

Country Link
US (1) US5409164A (de)
EP (1) EP0599709B2 (de)
JP (1) JPH06198450A (de)
AU (1) AU671492B2 (de)
DE (1) DE69311271T3 (de)
ES (1) ES2102624T5 (de)
FR (1) FR2698301B1 (de)

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Also Published As

Publication number Publication date
FR2698301A1 (fr) 1994-05-27
DE69311271D1 (de) 1997-07-10
US5409164A (en) 1995-04-25
ES2102624T5 (es) 2005-10-16
EP0599709B1 (de) 1997-06-04
DE69311271T3 (de) 2005-12-29
FR2698301B1 (fr) 1994-12-23
JPH06198450A (ja) 1994-07-19
ES2102624T3 (es) 1997-08-01
EP0599709A1 (de) 1994-06-01
AU671492B2 (en) 1996-08-29
AU5075893A (en) 1994-06-02
DE69311271T2 (de) 1997-10-30

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