EP1994808A1 - Transferred-arc plasma torch - Google Patents
Transferred-arc plasma torchInfo
- Publication number
- EP1994808A1 EP1994808A1 EP07726439A EP07726439A EP1994808A1 EP 1994808 A1 EP1994808 A1 EP 1994808A1 EP 07726439 A EP07726439 A EP 07726439A EP 07726439 A EP07726439 A EP 07726439A EP 1994808 A1 EP1994808 A1 EP 1994808A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrode
- torch
- gas
- plasma torch
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 claims abstract description 13
- 230000003628 erosive effect Effects 0.000 claims abstract description 6
- 239000002826 coolant Substances 0.000 claims abstract description 3
- 238000005253 cladding Methods 0.000 claims description 9
- 230000007935 neutral effect Effects 0.000 claims description 9
- 239000012809 cooling fluid Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000009792 diffusion process Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 230000000284 resting effect Effects 0.000 claims description 2
- 239000007772 electrode material Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 35
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 244000007853 Sarothamnus scoparius Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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
- H05H1/3421—Transferred arc or pilot arc mode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
- B05B7/22—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed electrically, magnetically or electromagnetically, e.g. by arc
- B05B7/222—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed electrically, magnetically or electromagnetically, e.g. by arc using an arc
- B05B7/224—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed electrically, magnetically or electromagnetically, e.g. by arc using an arc the material having originally the shape of a wire, rod or the like
-
- 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
- H05H1/3425—Melting or consuming electrodes
Definitions
- the present invention relates to the field of plasma torches and more particularly plasma torches transferred arc.
- Plasma torches are used for the treatment of matter (solid, liquid or gas) at a very high temperature in an atmosphere of controlled reactivity. Plasma torches are typically used in welding, marking, thermal spraying and waste treatment.
- Plasma is a gas in the ionized state, classically considered as a fourth state of matter.
- plasma torches are used. These provide the necessary energy for the ionization of the gas by means of an electromagnetic wave (radio frequency or microwave) or an electric arc.
- electromagnetic wave radio frequency or microwave
- electric arc we will consider here only the arc torches which constitute the only technology allowing to reach important operating powers.
- Arc torches are classified into two categories: blown arc torches and transferred arc torches.
- the two electrodes for the establishment of the arc are contained in the torch and the arc is therefore confined inside thereof.
- Plasma plume created by the passage of a gas in the arc is ejected outside the torch.
- the torch comprises only one electrode and the arc is established between the torch and another material acting as a counterelectrode. Examples of arc flash and arc flash torches are described in EP-A-706308.
- Two transferred arc torches can be used in a paired fashion to maintain an arc between them, one serving as a cathode and the other anode.
- This device is known as bipolar twin torches or "twin torches”.
- twin torches is described in application EP-A-1281296. Regardless of the arc torch technology implemented, the main problem remains the short life of the electrodes.
- the object of the present invention is to have a transferred arc plasma torch having the same utilization properties as cooled electrode plasma torches but without presenting the disadvantages thereof, in particular in terms of size and complexity. mounting and maintenance.
- the present invention is defined as a transferred arc plasma torch comprising a sleeve cooled by means of a cooling fluid and an electrode inserted in said sleeve, said electrode being made of a consumable material and the torch comprising means for feeding the electrode in this material so as to compensate for its erosion.
- the means for supplying the material electrode comprise means for automatically feeding the electrode towards the distal end of the torch.
- the means for supplying the material electrode comprise means for automatically feeding the electrode towards the distal end of the torch.
- the torch comprises gaseous cladding means ensuring the cladding of said electrode by a neutral gas and plasmagene inside said sheath.
- the gaseous cladding means ensure the scanning of the electrode by said gas and its diffusion at the distal end of the electrode.
- the sheath may comprise conduits for supplying a secondary gas at its distal end, the torch comprising injection means connected to said supply ducts for injecting a gas secondary downstream of the electrode.
- the plasma torch comprises a fixed torch body supporting all of the gas connections, the cooling fluid and the power supply.
- the sheath has a tubular portion secured to a torch head and passes therethrough, the torch head resting on said torch body and cooperating with it to ensure the continuity of the gas, cooling fluid and gas flow circuits. power supply between said connectors and said sleeve.
- the tubular portion of the sheath comprises two concentric shells delimiting a cavity connected to the cooling circuit.
- a guiding and holding device may be provided so as to position the torch head on said body in a predetermined position and fix it to said body in this position.
- the assembly and disassembly will be facilitated and in particular one will avoid sealing problems resulting from a misalignment between the body and the torch head.
- the power supply of the electrode is ensured by means of at least one metal broom mounted on the head of the torch and pressing on the surface of the electrode by the action of a spring. Again, the assembly and disassembly of the electrode will be facilitated.
- Fig. 1 schematically shows a transferred arc plasma torch according to the invention
- Fig. 2 represents a detail of a transferred arc plasma torch according to the invention.
- a first idea underlying the invention is to provide a consumable electrode fed continuously material.
- a second idea underlying the invention is to protect this electrode by a sheath of neutral gas in the sheath.
- Fig. 1 shows a transferred arc plasma torch according to the invention. It comprises a support 10 referred to as a torch body, a sheath 25, preferably metal, having a tubular portion integral at its upper part with a torch head 20, a consumable electrode 30, for example a graphite electrode, a guiding device and 40, a diffuser 50, a device for advancing the electrode 60, means for electrical connection to the brush electrode 70.
- the torch body 10 constitutes the fixed part of the torch which is never disassembled and supports all the connection with the fluid circuits, gas and power supply.
- the connections are the arrival and departure of cooling water from the head and sheath, the arrival of plasma gas, the secondary gas supply and the power supply.
- the torch body comprises in its upper part a plate 11 which open the gas circuits, cooling fluid and electrical connections.
- the torch head 20 is mounted on the plate 11 of the torch body by means of a guiding and holding device 40.
- This device ensures guiding and fixing of the torch head on the torch body in a predetermined position. Guiding is provided by a guiding pin or a centering device on the support body or a combination of these means. The maintenance is for example achieved by means of a quick fastening mechanism.
- the continuity of the fluid and gas circuits between the support body 10 and the torch head 20 is provided by systems suitable seals, for example by means of seals, in particular O-rings, or by means of special connections at the plate 11.
- the graphite cylindrical electrode 30 passes right through the torch head and extends into the sheath. Its power supply is performed by a metal brush contact 70 pushed on the electrode by a spring 71. Means are provided to allow the supply of the electrode consumable material, for example by means of automatic advance placed at the level of the torch head. These means of advance are for example motorized rollers 60 with adjustable speed, coming to rest on the electrode, in diametrically opposite positions and advancing the electrode by friction towards the distal end of the torch.
- Fig. 2 more precisely describes the end of the torch head according to the invention.
- the electrode 30 is protected by the sheath 25 and the torch head 20.
- the distal end 31 of the electrode is advantageously set back from the nose 26 of the torch.
- the sheath is cooled by internal circulation of a cooling fluid 21, for example water.
- the sleeve has a tubular shape with two concentric envelopes, the cooling fluid circulating in the cavity defined by these two envelopes.
- conduits 22 disposed inside the cavity allow the supply of the secondary gas 23 to the distal end of the torch.
- the plasma torch comprises gaseous cladding means adapted to maintain a neutral and protective gas sheath around the electrode.
- This neutral gas is also used to generate the plasma.
- the gaseous cladding means ensure not only the scanning of the electrode by the neutral gas but also the diffusion of this gas at its distal or active end. Thus the electrode is protected from the external environment, especially if it is oxidizing.
- the gas cladding means comprise the gas supply circuit and the diffuser 50.
- the latter fulfills several functions: in addition to the circulation of the plasmagenic neutral gas 80 between the electrode 30 and the sheath 25 and its diffusion to the active end of the electrode, it ensures the coaxial centering of the electrode 30 relative to the sheath 25 and their mutual electrical insulation.
- the diffuser 50 may be in the form of an insulating ring provided with a flange 51 at its lower part.
- the insulating ring is held in the sleeve 25 by a metal stop ring or equivalent clipping system.
- the inner diameter of the ring is chosen so as to maintain the sheath slightly overpressure and to ensure the scanning of the electrode 30 by the neutral gas and plasmagen.
- the flange is traversed by nozzles 52 fed by the supply pipe or pipes 22 of the secondary gas so that the secondary gas is injected into the plasma zone downstream of the electrode.
- the plasma gas allows the creation of a plasma with a stable arc while the secondary gas makes it possible to obtain a plasma having the desired chemical composition or physical properties.
- argagene and oxygen secondary gas will be used as plasmagenic neutral gas.
- Such a system can be used in all applications requiring the generation of a plasma and in particular in the field of waste treatment.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Electromagnetism (AREA)
- Plasma Technology (AREA)
- Arc Welding In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0650625A FR2897747B1 (en) | 2006-02-23 | 2006-02-23 | ARC PLASMA TORCH TRANSFER |
PCT/EP2007/051618 WO2007096357A1 (en) | 2006-02-23 | 2007-02-20 | Transferred-arc plasma torch |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1994808A1 true EP1994808A1 (en) | 2008-11-26 |
EP1994808B1 EP1994808B1 (en) | 2014-04-09 |
Family
ID=37309137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07726439.8A Active EP1994808B1 (en) | 2006-02-23 | 2007-02-20 | Transferred-arc plasma torch |
Country Status (8)
Country | Link |
---|---|
US (1) | US9686850B2 (en) |
EP (1) | EP1994808B1 (en) |
JP (1) | JP5226536B2 (en) |
KR (1) | KR101376626B1 (en) |
CN (1) | CN101390454B (en) |
FR (1) | FR2897747B1 (en) |
RU (1) | RU2456780C2 (en) |
WO (1) | WO2007096357A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105554997A (en) * | 2016-02-16 | 2016-05-04 | 衢州迪升工业设计有限公司 | Electrode of arc plasma device |
Families Citing this family (24)
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---|---|---|---|---|
US8525069B1 (en) | 2012-05-18 | 2013-09-03 | Hypertherm, Inc. | Method and apparatus for improved cutting life of a plasma arc torch |
US10456855B2 (en) | 2013-11-13 | 2019-10-29 | Hypertherm, Inc. | Consumable cartridge for a plasma arc cutting system |
US9981335B2 (en) | 2013-11-13 | 2018-05-29 | Hypertherm, Inc. | Consumable cartridge for a plasma arc cutting system |
US11278983B2 (en) | 2013-11-13 | 2022-03-22 | Hypertherm, Inc. | Consumable cartridge for a plasma arc cutting system |
US11432393B2 (en) | 2013-11-13 | 2022-08-30 | Hypertherm, Inc. | Cost effective cartridge for a plasma arc torch |
US11684995B2 (en) | 2013-11-13 | 2023-06-27 | Hypertherm, Inc. | Cost effective cartridge for a plasma arc torch |
WO2015172142A1 (en) * | 2014-05-09 | 2015-11-12 | Hypertherm, Inc. | Consumable cartridge for a plasma arc cutting system |
AU2015301727B2 (en) | 2014-08-12 | 2020-05-14 | Hypertherm, Inc. | Cost effective cartridge for a plasma arc torch |
DE102014219275A1 (en) | 2014-09-24 | 2016-03-24 | Siemens Aktiengesellschaft | Ignition of flames of an electropositive metal by plasmatization of the reaction gas |
CN105879217A (en) * | 2014-10-15 | 2016-08-24 | 王守国 | Inductive plasma pen |
US10208263B2 (en) * | 2015-08-27 | 2019-02-19 | Cogent Energy Systems, Inc. | Modular hybrid plasma gasifier for use in converting combustible material to synthesis gas |
CN105555004B (en) * | 2016-02-16 | 2017-12-08 | 衢州迪升工业设计有限公司 | The electrode structure of telescopic striking |
CN105554996B (en) * | 2016-02-16 | 2017-12-01 | 衢州迪升工业设计有限公司 | Arc plasma device |
CN105555005B (en) * | 2016-02-16 | 2017-12-05 | 衢州迪升工业设计有限公司 | A kind of plasma pyrolysis device of telescopic striking |
CN105491777B (en) * | 2016-02-16 | 2018-01-02 | 衢州迪升工业设计有限公司 | The plasma device of telescopic striking |
CN105517313B (en) * | 2016-02-16 | 2018-01-02 | 衢州迪升工业设计有限公司 | The electrode of telescopic striking pyrolysis installation |
CN105555006B (en) * | 2016-02-16 | 2018-03-13 | 衢州迪升工业设计有限公司 | Utilize the electrode of fuse striking |
CN105491778B (en) * | 2016-02-22 | 2017-12-05 | 衢州迪升工业设计有限公司 | A kind of plasma pyrolysis device |
WO2017214184A1 (en) * | 2016-06-06 | 2017-12-14 | Comau Llc | Wire guides for plasma transferred wire arc processes |
CN106879154A (en) * | 2017-03-25 | 2017-06-20 | 郭敏青 | A kind of plasma pyrolysis device |
EP3393215A1 (en) | 2017-04-20 | 2018-10-24 | Andrey Senokosov | Arc plasmatron surface treatment |
US11007593B1 (en) | 2017-06-27 | 2021-05-18 | The United States Of America As Represented By The Secretary Of The Navy | Vulcan fire torch |
CN108633159A (en) * | 2018-05-02 | 2018-10-09 | 北京戎聚环境科技有限公司 | Plasma generator |
US10926238B2 (en) | 2018-05-03 | 2021-02-23 | Cogent Energy Systems, Inc. | Electrode assembly for use in a plasma gasifier that converts combustible material to synthesis gas |
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-
2006
- 2006-02-23 FR FR0650625A patent/FR2897747B1/en not_active Expired - Fee Related
-
2007
- 2007-02-20 EP EP07726439.8A patent/EP1994808B1/en active Active
- 2007-02-20 RU RU2008137802/07A patent/RU2456780C2/en not_active IP Right Cessation
- 2007-02-20 WO PCT/EP2007/051618 patent/WO2007096357A1/en active Application Filing
- 2007-02-20 CN CN200780006389.9A patent/CN101390454B/en active Active
- 2007-02-20 US US12/280,337 patent/US9686850B2/en active Active
- 2007-02-20 JP JP2008555778A patent/JP5226536B2/en active Active
-
2008
- 2008-08-21 KR KR1020087020500A patent/KR101376626B1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO2007096357A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105554997A (en) * | 2016-02-16 | 2016-05-04 | 衢州迪升工业设计有限公司 | Electrode of arc plasma device |
CN105554997B (en) * | 2016-02-16 | 2018-01-02 | 衢州迪升工业设计有限公司 | The electrode of arc plasma device |
Also Published As
Publication number | Publication date |
---|---|
CN101390454A (en) | 2009-03-18 |
JP5226536B2 (en) | 2013-07-03 |
EP1994808B1 (en) | 2014-04-09 |
FR2897747A1 (en) | 2007-08-24 |
US9686850B2 (en) | 2017-06-20 |
WO2007096357A1 (en) | 2007-08-30 |
FR2897747B1 (en) | 2008-09-19 |
JP2009527882A (en) | 2009-07-30 |
CN101390454B (en) | 2015-11-25 |
RU2008137802A (en) | 2010-03-27 |
RU2456780C2 (en) | 2012-07-20 |
KR101376626B1 (en) | 2014-03-20 |
US20090261081A1 (en) | 2009-10-22 |
KR20080095256A (en) | 2008-10-28 |
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