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EP3291651B1 - Dispositif et procédé de production d'un plasma atmosphérique - Google Patents

Dispositif et procédé de production d'un plasma atmosphérique Download PDF

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Publication number
EP3291651B1
EP3291651B1 EP17001337.9A EP17001337A EP3291651B1 EP 3291651 B1 EP3291651 B1 EP 3291651B1 EP 17001337 A EP17001337 A EP 17001337A EP 3291651 B1 EP3291651 B1 EP 3291651B1
Authority
EP
European Patent Office
Prior art keywords
plasma
medium
wall
plasma head
housing
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.)
Active
Application number
EP17001337.9A
Other languages
German (de)
English (en)
Other versions
EP3291651A1 (fr
Inventor
Manuel Kunz
André Hellinger
Sudarsan Vedantha
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.)
Bdtronic GmbH
Original Assignee
Bdtronic GmbH
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
Application filed by Bdtronic GmbH filed Critical Bdtronic GmbH
Priority to RS20230008A priority Critical patent/RS63874B1/sr
Priority to SI201731291T priority patent/SI3291651T1/sl
Publication of EP3291651A1 publication Critical patent/EP3291651A1/fr
Application granted granted Critical
Publication of EP3291651B1 publication Critical patent/EP3291651B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H05H1/28—Cooling arrangements
    • 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
    • H05H1/36—Circuit arrangements

Definitions

  • the invention relates to a device for generating an atmospheric plasma according to the features of claim 1.
  • the invention also relates to a method for generating an atmospheric plasma according to claim 5.
  • a plasma head with a transformer and a plasma nozzle is used to generate an atmospheric plasma.
  • a process gas in the plasma nozzle is ionized by a discharge due to the high voltage generated by the transformer.
  • the process gas then exits the nozzle as a directed plasma jet or plasma flame.
  • the power loss of the transformer which accumulates as heat in the housing of the plasma head, has proven to be particularly disadvantageous in this compact design. This heat generation can be so great that the transformer fails or is damaged. The generation of plasma is thus influenced by this heat development.
  • the invention is therefore based on the object of creating a device and a method for generating an atmospheric plasma, with which stable and reliable operation is ensured.
  • a device for solving this problem has the features of claim 1.
  • a plasma head to which a transformer and at least one plasma nozzle is assigned, the transformer and the plasma nozzle forming a spatial unit, having a supply line for a medium flowing through for active temperature control of the plasma head and being in a wall of a housing of the plasma head at least one channel for guiding the medium is arranged.
  • the channel extends at least in regions over the wall of the plasma head, being connected to at least one inlet.
  • the medium is the process gas.
  • the plasma head can be actively tempered by the flowing medium. Accordingly, depending on the design or the size and the operation of the plasma head, it can be actively temperature-controlled.
  • the flowing medium constantly transports heat away from the plasma head.
  • the plasma head can be kept at a stable temperature during the entire operating time due to the subsequent flow of the medium.
  • a temperature can thus be generated in the plasma head via the medium flowing through, at which a maximum yield of plasma is achieved and at the same time the plasma head works in a particularly stable and reliable manner.
  • the invention provides that as a medium for temperature control, in particular for cooling, the plasma head, preferably the transformer, an electrode or a Plasma nozzle the process gas itself can be used.
  • the plasma head preferably the transformer, an electrode or a Plasma nozzle the process gas itself can be used.
  • the process gas as a cooling medium is particularly advantageous since it has to be fed to the plasma head anyway.
  • the process gas first flows through the area around the transformer before it is fed to the plasma nozzle for plasma generation.
  • the temperature of the process gas which is increased by absorbing the thermal energy, has no effect whatsoever on the efficiency of the plasma formation.
  • the process gas is mixed with another medium which has proven to be particularly good as a cooling medium. In this way, the heat can be dissipated quickly from the plasma head and a plasma flame can be generated at the same time, without having to install an additional line for the cooling medium on the plasma head.
  • a particularly advantageous embodiment of the present invention can provide that in a housing, preferably in a wall of the housing, a channel, in particular meandering, for guiding the medium is arranged, which at least partially extends over the wall of the housing and is connected to the at least connected to a supply line.
  • a channel in particular meandering, for guiding the medium is arranged, which at least partially extends over the wall of the housing and is connected to the at least connected to a supply line.
  • the second end of the channel can either be free, so that the gas is fed into the atmosphere, or it can be connected to the supply line for the plasma nozzle, so that the medium is used directly as a process gas for plasma generation. With this design, the compact design of the plasma head can be maintained.
  • the meandering channel for the medium can be realized by parallel, perpendicular, in particular parallel to a longitudinal axis of the housing, bores in the wall of the housing.
  • the channels can initially be open to the end faces of the hollow-cylindrical housing.
  • These openings can be designed to be closable by a base or cover part of the housing in such a way that alternately two adjacent openings are connected to each other or isolated from each other, so that the meandering channel is formed in the wall.
  • the base or cover part of the housing is, for example, screwed or glued to the housing.
  • a further exemplary embodiment can provide for the channel to be designed as a screw in the wall of the housing.
  • Such a housing with a screw-like channel in the wall can be produced, for example, using an additive process such as a 3D printer.
  • the channel is designed as an evaporator for a liquid medium.
  • a liquid medium is first fed into the channel in order to then be fed into the plasma nozzle as a gas. Since liquid media generally have a higher heat capacity than gases, the heat transfer between the transformer or the wall and the medium can be increased and at the same time the medium can be used at least partially as a process gas. This also enables layer deposition.
  • the present invention can further provide that at least one heat sink, in particular cooling ribs, along which the medium can be guided, is arranged on an outside of the wall or the housing.
  • at least one heat sink in particular cooling ribs, along which the medium can be guided, is arranged on an outside of the wall or the housing.
  • it can also have cooling bodies on the outside.
  • These heat sinks can then in turn be actively cooled by applying a cooling medium, preferably by a fan.
  • a method for solving the problem mentioned at the outset has the measures of claim 5 . Accordingly, it is provided that a plasma head, in whose housing a transformer and at least one plasma nozzle is arranged, is actively temperature-controlled by a flowing medium, the medium being guided through a channel in a wall of a housing of the plasma head for the active temperature control of the plasma head , whereby the process gas is used as the medium.
  • process heat from the transformer can be actively and efficiently dissipated.
  • a different heat development of the transformer is to be expected.
  • the heat dissipation from the plasma head can be actively controlled so that the plasma head can be operated at an optimal operating temperature. At the optimum operating temperature, the plasma head is particularly reliable and stable.
  • a further exemplary embodiment of the present invention can provide that for the active temperature control, preferably cooling, of the plasma head, the medium is guided through the housing, preferably through a wall of the housing, of the plasma head, in particular through a channel in the wall of the plasma head and the passage of the medium is controlled by a valve so that the flow depends on the temperature of the plasma head.
  • the present invention can further provide that, for the active temperature control, the medium guided through the wall is preheated and/or is guided through the wall under a predetermined pressure.
  • a temperature sensor is arranged in the plasma head, which measures the temperature and transmits it to a control unit, which accordingly pre-cools or heats the medium.
  • the pressure can also be varied. For example, when there is a large amount of thermal energy to be dissipated, the pressure of the medium can be increased to control the temperature of the plasma head. By increasing the pressure of the medium, the flow is increased, so that the thermal energy to be absorbed per unit of time is increased. Likewise, the pressure of the medium with which it is guided through the channel can be reduced if only a small amount of thermal energy has to be removed from the plasma head. This pre-temperature control and varying the pressure ensure particularly efficient and therefore reliable and stable operation of the plasma head.
  • a further advantageous exemplary embodiment of the present invention can provide that the medium for tempering the plasma head is applied to an outside of the wall. Applying the medium to the outside of the housing or the wall in this way creates a particularly simple way of cooling the plasma head.
  • FIG 1 An embodiment of a plasma head 10 according to the invention is shown in FIG 1 shown highly schematized in cross section.
  • the plasma head 10 consists of a housing 11, inside which a transformer 12 and a plasma nozzle 13 are arranged.
  • the transformer 12 is enclosed by an insulator 14 and connected to a voltage source 15 .
  • the high voltage required to ignite the plasma is generated by the transformer 12 and the voltage source 15 .
  • a wall 23 of the housing 11 of the plasma head 10 is connected to a ground 29 .
  • the plasma nozzle 13 has an electrode 16 which is coupled to the transformer 12 .
  • the tip of this needle-shaped electrode 16 points in the direction of a ring electrode 17 serving as an outlet for the plasma.
  • Process gas is conducted into the nozzle volume 19 through a process gas inlet 18 .
  • the process gas is shown schematically as arrow 20 here. In reality, the nozzle volume 19 is filled almost homogeneously by a permanent flow of the process gas 18 .
  • An electrical discharge between the electrode 16 and the ring electrode 17 causes the process gas to be ionized, symbolically represented here as a lightning bolt 21 .
  • the ionized gas leaves the plasma nozzle 13 through the ring electrode 17 as a plasma jet 22 or as a plasma flame.
  • At least one channel 24 is formed in the wall 23 of the plasma head 10 .
  • this channel 24 extends in a meandering manner through the entire wall 23.
  • a rolled-up wall 23 of the plasma head 10 is shown schematically, so that the meandering course of the channel 24 in the wall 23 becomes clear.
  • the channel 24 has an inlet 25 and an outlet 26 .
  • a medium is let into the inlet 25 via a valve (not shown) or from a storage volume, so that the medium flows at a predetermined pressure through the channel 24 in the direction of the outlet 26 (see arrow 27).
  • the medium flowing through which is the process gas, dissipates the heat developed by the transformer 12 .
  • This process gas After this process gas has flowed through the channel 24 and has absorbed heat energy from the transformer 12 , it is conducted through the process gas inlet 18 into the nozzle volume 19 by a connecting means 28 shown here in broken lines.
  • the connecting means 18 can be, for example, a hose or a short piece of pipe. This connecting means 18 can also be integrated in the housing 11 or the plasma head 10 .
  • the channel 24 is integrated into the housing 11 or into the wall 23 .
  • a control device which determines the temperature in the plasma head 10 via a temperature sensor, also not shown, in the plasma head 10 and controls the inflow of the process gas in the channel 24 accordingly.
  • FIG. 1 shows the 3 another embodiment of a channel 30.
  • the medium as previously at the in 1 described embodiment described, fed to the channel 30 through an inlet, not shown, and fed to the nozzle volume 19 via a connecting means 28 in the manner described above.
  • the channel 30 is arranged in the wall 23 of the plasma head 10 in the manner of a screw. This screw-like arrangement of the channel 30 allows a particularly long contact surface to be produced between the medium and the wall 23, so that the thermal energy is transferred to the medium in a particularly efficient manner.
  • the wall 23 may be assigned cooling bodies (not shown), such as cooling fins, on its outer side 31 .
  • the thermal energy of the transformer 12 is also effectively dissipated from the plasma head 10 through these cooling ribs, around which a medium for cooling can also flow, for example.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Plasma Technology (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (7)

  1. Dispositif de production d'un plasma atmosphérique, comprenant une tête de plasma (10) qui présente un transformateur (12) permettant de produire une haute tension et au moins une buse à plasma (13) qui peut être alimentée par un gaz de process pour la production de plasma, le transformateur (12) et au moins une buse à plasma (13) formant une unité physique, et la tête de plasma (10) présentant au moins une conduite d'alimentation pour un fluide qui circule, le fluide étant le gaz de process, pour l'équilibrage de température actif de la tête de plasma (10),
    caractérisé en ce que dans une paroi (23) d'un boîtier (11) de la tête de plasma (10) est disposé au moins un canal (24, 30) pour guider le fluide, qui s'étend au moins par endroits sur la paroi (23) de la tête de plasma (10) et qui est relié à au moins une entrée (25).
  2. Dispositif de production d'un plasma atmosphérique selon la revendication 1, dans lequel, dans la paroi (23) de la tête de plasma (10), au moins un canal en forme de méandres (24, 30) est disposé pour guider le fluide, qui s'étend au moins par endroits sur la paroi (23) de la tête de plasma (10) et qui est relié à ladite au moins une entrée (25).
  3. Dispositif de production d'un plasma atmosphérique selon la revendication 1 ou 2, dans lequel le canal (24, 30) est réalisé sous la forme de perçages parallèles, en particulier disposés en parallèle à un axe longitudinal du boîtier (11), dans la paroi (23) du boîtier (11), les perçages ouverts sur les faces frontales du boîtier (11), en particulier cylindrique creux, pouvant être reliés ou isolés les uns par rapport aux autres par une partie de fond ou de couvercle de façon à réaliser un canal en forme de méandres (24) dans la paroi (23).
  4. Dispositif de production d'un plasma atmosphérique selon l'une quelconque des revendications précédentes, dans lequel, sur une face extérieure (31) du boîtier (11) est disposé au moins un corps de refroidissement, en particulier des nervures de refroidissement le long desquels le fluide peut être guidé.
  5. Procédé de production d'un plasma atmosphérique à l'aide d'un transformateur (12) permettant de produire une haute tension et d'au moins une buse à plasma (13) qui est alimentée en gaz de process pour la production du plasma, le transformateur (12) et ladite au moins une buse à plasma (13) formant une tête de plasma (10), et la tête de plasma (10) étant activement équilibrée en température par un fluide qui circule, le gaz de process étant utilisé comme fluide,
    caractérisé en ce que pour l'équilibrage de température actif de la tête de plasma (10), le fluide est guidé à travers un canal (24, 30) dans une paroi (23) d'un boîtier (11) de la tête de plasma (10).
  6. Procédé de production d'un plasma atmosphérique selon la revendication 5, dans lequel, pour l'équilibrage de température actif, le fluide guidé à travers la paroi (23) est préalablement équilibré en température et/ou guidé à travers le canal (24, 30) sous une pression prédéterminée.
  7. Procédé de production d'un plasma atmosphérique selon la revendication 5 ou 6, dans lequel une face extérieure (31) du boîtier (11) est sollicitée par le fluide pour d'équilibrage de température de la tête de plasma (10).
EP17001337.9A 2016-09-05 2017-08-04 Dispositif et procédé de production d'un plasma atmosphérique Active EP3291651B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
RS20230008A RS63874B1 (sr) 2016-09-05 2017-08-04 Uređaj i postupak za proizvodnju atmosferske plazme
SI201731291T SI3291651T1 (sl) 2016-09-05 2017-08-04 Naprava in postopek za generiranje atmosferske plazme

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016010619.0A DE102016010619A1 (de) 2016-09-05 2016-09-05 Vorrichtung und Verfahren zur Erzeugung eines atmosphärischen Plasmas

Publications (2)

Publication Number Publication Date
EP3291651A1 EP3291651A1 (fr) 2018-03-07
EP3291651B1 true EP3291651B1 (fr) 2022-10-12

Family

ID=59558156

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17001337.9A Active EP3291651B1 (fr) 2016-09-05 2017-08-04 Dispositif et procédé de production d'un plasma atmosphérique

Country Status (10)

Country Link
EP (1) EP3291651B1 (fr)
DE (1) DE102016010619A1 (fr)
DK (1) DK3291651T3 (fr)
ES (1) ES2935577T3 (fr)
FI (1) FI3291651T3 (fr)
HU (1) HUE061142T2 (fr)
PL (1) PL3291651T3 (fr)
PT (1) PT3291651T (fr)
RS (1) RS63874B1 (fr)
SI (1) SI3291651T1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19900128B4 (de) * 1998-12-21 2012-01-26 Sulzer Metco Ag Düse sowie Düsenanordnung für einen Brennerkopf eines Plasmaspritzgeräts

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD83890A1 (de) 1970-05-27 1971-08-12 Kühlmediumführung für Brenner
US5247152A (en) 1991-02-25 1993-09-21 Blankenship George D Plasma torch with improved cooling
DE60201387T2 (de) 2000-04-10 2005-11-17 Tetronics Ltd., Faringdon Doppel-plasmabrennervorrichtung
AT503646B1 (de) 2006-09-15 2007-12-15 Fronius Int Gmbh Wasserdampfplasmabrenner und verfahren zur verschleisserkennung und prozessregelung bei einem solchen wasserdampfplasmabrenner
DE102009028190A1 (de) 2009-08-03 2011-02-10 Leibniz-Institut für Plasmaforschung und Technologie e.V. Vorrichtung zur Erzeugung eines nichtthermischen Atmosphärendruck-Plasmas
DE102012103938A1 (de) 2012-05-04 2013-11-07 Reinhausen Plasma Gmbh Plasmamodul für eine Plasmaerzeugungsvorrichtung und Plasmaerzeugungsvorrichtung
DE102013100617B4 (de) 2013-01-22 2016-08-25 Epcos Ag Vorrichtung zur Erzeugung eines Plasmas und Handgerät mit der Vorrichtung
DE202015001278U1 (de) 2015-02-16 2016-05-19 Abc-Coron Gmbh Beschichtungsvorrichtung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19900128B4 (de) * 1998-12-21 2012-01-26 Sulzer Metco Ag Düse sowie Düsenanordnung für einen Brennerkopf eines Plasmaspritzgeräts

Also Published As

Publication number Publication date
RS63874B1 (sr) 2023-02-28
SI3291651T1 (sl) 2023-07-31
EP3291651A1 (fr) 2018-03-07
ES2935577T3 (es) 2023-03-08
DK3291651T3 (da) 2023-01-16
FI3291651T3 (fi) 2023-01-31
HUE061142T2 (hu) 2023-05-28
PL3291651T3 (pl) 2023-07-03
DE102016010619A1 (de) 2018-03-08
PT3291651T (pt) 2023-01-16

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