EP0823192B1 - Plasmabrenner für übertragenen lichtbogen - Google Patents
Plasmabrenner für übertragenen lichtbogen Download PDFInfo
- Publication number
- EP0823192B1 EP0823192B1 EP97904327A EP97904327A EP0823192B1 EP 0823192 B1 EP0823192 B1 EP 0823192B1 EP 97904327 A EP97904327 A EP 97904327A EP 97904327 A EP97904327 A EP 97904327A EP 0823192 B1 EP0823192 B1 EP 0823192B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- torch
- electrode
- pct
- plasma
- 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
Links
Images
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
- H05H1/3431—Coaxial cylindrical electrodes
-
- 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
- H05H1/3468—Vortex generators
-
- 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
- H05H1/3478—Geometrical details
Definitions
- the invention relates to a plasma torch for direct current with a transmitted arc, a device for the vortex-shaped supply of the plasma gas, a thermal insulation on the outside of the burner and the same potential between the burner nozzle and metallic outer casing of the burner.
- Plasma torches are realized by stabilizing an arc on a carrier gas becomes.
- the simplest way to do this is to use a graphite electrode with axial bore through which the carrier gas in the arc, which is between Forms electrode and hot melt, is blown.
- graphite burners it also cooled metal burners. They can be burner with non-transmitted Arc (indirect torch) and in torch with transferred arc (direct torch) organize.
- indirect burners the electrode and counter electrode are integrated in the burner. In the case of direct burners, one electrode is arranged in the burner and the counter electrode represents the material to be treated.
- the burner gas is either introduced axially, with a rod-shaped electrode being washed around or tangentially into a gap, which lies below a cooled hollow electrode. Spiral forms in this hollow electrode a gas vortex. The base point of the arc is thus the inner one Electrode surface moves, causing it to remove the electrodes as evenly as possible is coming.
- the known designs are very prone to failure and tend to form standing Electric arc. This leads to rapid destruction of the electrode and to burner failure. There are also very high thermal losses.
- the rotation of the arc is supported by auxiliary magnetic fields. These burners are available in indirect version (e.g. Union Carbide / Linde, Westinghouse) or direct version (e.g. Plasma Energy Corp., Retech).
- FIG. 1 shows a functional sketch of an embodiment according to the invention. It exists from a burner holder (1) with thermal insulation (2), outer housing (3) with thermal Insulation (4), with hollow electrode (5) and nose (6). Between the electrode and nose a rotationally symmetrical ring with two or more rows of holes as a gas vortex generator (7) used, through which the gas (9) is blown tangentially. The nozzles are arranged in the same direction.
- Figure 2 shows a section through the gas ring (7). The nozzles (10) are arranged so that they flow tangentially to the top rows of the baffle. Thereby In contrast to known burners of this type, the gas vortex is divided into two parts disassembled.
- One part forms in the hollow electrode, while the other part in the nose is stabilized. This results in a very stable vortex configuration. While with direct Burners of conventional design, distance fluctuations between the nose and what is to be treated Well disturb the vortex formation and thus lead to locally increased electrode erosion lead, the vortex formation with the multi-row gas vortex generator remains unaffected. This ensures homogeneous removal of the hollow electrode.
- This inventive Measures cause the electrode to be extended by one Factor of at least 10.
- the position of the removal in the axial direction is due to the gas velocity adjustable. Around the removal surface as broadly as possible in the axial direction to keep the burner gas with an alternating pressure that is variable by a constant pressure blown in. Amplitudes and frequencies are corresponding to gas vortex generators and Programmable burner voltage.
- gas can also be blown in through the nozzle (8) become. This means that if the arc fails, one of the Burner directed flow can be obtained, which prevents contamination.
- the outer casing of the burner and the nose are set to the same potential. Leakage currents between This prevents the nose and the outer casing of the burner from becoming harmful Rollovers.
- To conduct conductive precipitation on the metallic surface of the cooled Burner outer housing and thus flashovers between the burner housing and burner holder To prevent the burner outer housing and burner holder with a thermal insulated protective layer.
- the burner is with a common ignition mechanism equipped.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Geometry (AREA)
- Plasma Technology (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Arc Welding In General (AREA)
Description
Claims (5)
- Plasmabrenner für übertragenen Lichtbogen mit wirbelförmiger Gaszuführung dadurch gekennzeichnet, dass
der Gaswirbelerzeuger (7) aus einem zylindrischen Körper mit mindestens zwei übereinander angeordneten Lochreihen (10) und einer den oberen Lochreihen zugeordneten Prallwand besteht. - Plasmabrenner gemäss Anspruch 1 dadurch gekennzeichnet, dass Brennernase (6) und Brenneraussengehäuse (3) auf gleichem Potential liegen.
- Plasmabrenner gemäss Anspruch 1 dadurch gekennzeichnet, dass auf der Aussenseite des Brenneraussengehäuses (3) eine wärmebeständige thermische Isolation (4) aufgebracht ist.
- Plasmabrenner gemäss Anspruch 1 dadurch gekennzeichnet, dass im Brenner Zusatzdüsen (8) so angebracht sind, dass eine achsiale Gaszuführung möglich ist.
- Plasmabrenner gemäss Anspruch 1 dadurch gekennzeichnet, dass der Gasdruck des Plasmagases so gesteuert wird, dass der Gaswirbel in achsialer Richtung oszilliert.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH00471/96A CH690408A5 (de) | 1996-02-23 | 1996-02-23 | Plasmabrenner für übertragenen Lichtbogen. |
CH471/96 | 1996-02-23 | ||
CH47196 | 1996-02-23 | ||
PCT/CH1997/000065 WO1997031509A1 (de) | 1996-02-23 | 1997-02-21 | Plasmabrenner für übertragenen lichtbogen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0823192A1 EP0823192A1 (de) | 1998-02-11 |
EP0823192B1 true EP0823192B1 (de) | 2000-09-20 |
Family
ID=4187765
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97904327A Expired - Lifetime EP0823192B1 (de) | 1996-02-23 | 1997-02-21 | Plasmabrenner für übertragenen lichtbogen |
Country Status (6)
Country | Link |
---|---|
US (1) | US6002096A (de) |
EP (1) | EP0823192B1 (de) |
AT (1) | ATE196587T1 (de) |
CH (1) | CH690408A5 (de) |
DE (1) | DE59702375D1 (de) |
WO (1) | WO1997031509A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6915964B2 (en) * | 2001-04-24 | 2005-07-12 | Innovative Technology, Inc. | System and process for solid-state deposition and consolidation of high velocity powder particles using thermal plastic deformation |
WO2012158443A2 (en) | 2011-05-13 | 2012-11-22 | Sheperak Thomas J | Plasma directed electron beam wound care system apparatus and method |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU1484528A1 (ru) * | 1986-12-16 | 1989-06-07 | Предприятие П/Я А-3605 | Способ обработки деталей и устройство дл его осуществлени |
FR2614750B1 (fr) * | 1987-04-29 | 1991-10-04 | Aerospatiale | Electrode tubulaire pour torche a plasma et torche a plasma pourvue de telles electrodes |
CA1323670C (en) * | 1988-05-17 | 1993-10-26 | Subramania Ramakrishnan | Electric arc reactor |
FR2654293B1 (fr) * | 1989-11-08 | 1996-05-24 | Aerospatiale | Torche a plasma a injection non refroidie de gaz plasmagene. |
US5262616A (en) * | 1989-11-08 | 1993-11-16 | Societe Nationale Industrielle Et Aerospatiale | Plasma torch for noncooled injection of plasmagene gas |
EP0526560B1 (de) * | 1990-04-24 | 1997-01-29 | Hypertherm, Inc. | Wirbelring und flusssteuerungsverfahren eines plasmalichtbogenbrenners |
FR2669847B1 (fr) * | 1990-11-29 | 1995-11-24 | Trafimet Trafilerie Metalliche | Chalumeau coupeur a plasma, dans lequel le declenchement de l'amorcage est realise a l'aide d'un contact. |
US5317126A (en) * | 1992-01-14 | 1994-05-31 | Hypertherm, Inc. | Nozzle and method of operation for a plasma arc torch |
US5298714A (en) * | 1992-12-01 | 1994-03-29 | Hydro-Quebec | Plasma torch for the treatment of gases and/or particles and for the deposition of particles onto a substrate |
US5374802A (en) * | 1992-12-31 | 1994-12-20 | Osram Sylvania Inc. | Vortex arc generator and method of controlling the length of the arc |
FR2734445B1 (fr) * | 1995-05-19 | 1997-07-18 | Aerospatiale | Torche a plasma d'arc a courant continu, particulierement destinee a l'obtention d'un corps chimique par decomposition d'un gaz plasmagene |
-
1996
- 1996-02-23 CH CH00471/96A patent/CH690408A5/de not_active IP Right Cessation
-
1997
- 1997-02-21 AT AT97904327T patent/ATE196587T1/de not_active IP Right Cessation
- 1997-02-21 WO PCT/CH1997/000065 patent/WO1997031509A1/de active IP Right Grant
- 1997-02-21 DE DE59702375T patent/DE59702375D1/de not_active Expired - Fee Related
- 1997-02-21 EP EP97904327A patent/EP0823192B1/de not_active Expired - Lifetime
- 1997-02-21 US US08/981,945 patent/US6002096A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
WO1997031509A1 (de) | 1997-08-28 |
EP0823192A1 (de) | 1998-02-11 |
DE59702375D1 (de) | 2000-10-26 |
ATE196587T1 (de) | 2000-10-15 |
US6002096A (en) | 1999-12-14 |
CH690408A5 (de) | 2000-08-31 |
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