EP0142816B1 - Appareil de pulvérisation par flamme de poudre comportant une buse d'accélération - Google Patents

Appareil de pulvérisation par flamme de poudre comportant une buse d'accélération Download PDF

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Publication number
EP0142816B1
EP0142816B1 EP84113717A EP84113717A EP0142816B1 EP 0142816 B1 EP0142816 B1 EP 0142816B1 EP 84113717 A EP84113717 A EP 84113717A EP 84113717 A EP84113717 A EP 84113717A EP 0142816 B1 EP0142816 B1 EP 0142816B1
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EP
European Patent Office
Prior art keywords
nozzle
adapter sleeve
sleeve
flame
powder
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
EP84113717A
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German (de)
English (en)
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EP0142816A3 (en
EP0142816A2 (fr
Inventor
Erwin Hühne
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Individual
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Individual
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Publication date
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Application filed by Individual filed Critical Individual
Priority to AT84113717T priority Critical patent/ATE39222T1/de
Publication of EP0142816A2 publication Critical patent/EP0142816A2/fr
Publication of EP0142816A3 publication Critical patent/EP0142816A3/de
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Publication of EP0142816B1 publication Critical patent/EP0142816B1/fr
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Classifications

    • 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
    • B05B7/20—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 by flame or combustion
    • B05B7/201—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 by flame or combustion downstream of the nozzle
    • B05B7/205—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 by flame or combustion downstream of the nozzle the material to be sprayed being originally a particulate material
    • 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
    • H05H1/42—Plasma torches using an arc with provisions for introducing materials into the plasma, e.g. powder, liquid

Definitions

  • the invention relates to a powder flame spraying device consisting of a device base body, on which a flame spray nozzle with a special accelerator nozzle is arranged on its end face, which is supplied with accelerator gas from the device base body, for which purpose blow-out openings are provided on the device base body, which have an annular gap between the flame spray nozzle and a removable one Union sleeve in connection.
  • Such a powder flame spraying device is known from US Pat. No. 3,455,510.
  • an annular nozzle is provided between the coupling sleeve and the flame spray nozzle on the front side of this device, which receives the accelerator gas from the annular gap.
  • Similar devices are known from FR-PS-1 084 684 and US-PS-3 085 750; In these devices, too, the accelerator gas is blown out of the flame spray nozzle from an annular gap between the flame spray nozzle and a removable union sleeve on the front sides thereof by a special accelerator nozzle in the immediate vicinity of the flame.
  • Such accelerator systems are required in order to give the powder material melted in the flame from the flame spray nozzle a sufficient kinetic energy; this is the prerequisite for achieving a compact, firm layer structure of the applied flame spray material.
  • the exit of the accelerator nozzle for the accelerator gas is at the level of the exit of the flame gases from the flame spray nozzle.
  • the accelerator gas will lower the combustion temperature in the flame, which in turn is not desirable.
  • a powder flame spraying device has therefore already been built in which two special nozzle tubes are attached to a clamping ring on the flame spraying nozzle (DE-A 3 102 848). These tubes are then further away from the flame spray nozzle and its flame and can then be aligned at the flame tip or in front of it at any point where the required kinetic energy can be given to the material that has already melted. These tubes are fed separately from a special distributor piece on the basic device body through special hose feeds for the accelerator gas. This device is cumbersome because the clamping ring with the tubes and the distributor with the hose connections have to be mounted separately on the powder flame spraying device.
  • the alignment of the tubes must be carried out separately so that they blow the accelerator gas into the correct position with respect to the flame in front of the flame spray nozzle.
  • the separate feed hoses, the distributor and the clamping ring with the protruding nozzle tubes hinder the proper operation of the powder flame spraying device by the operator during operation.
  • the invention has for its object to provide a powder flame spraying device of the type mentioned, in which the accelerator nozzle does not hinder the actual flame, prevents overheating of the sprayed substrate and is nevertheless integrated into the rest of the device, i.e. does not require any special assembly and feeds and the like .
  • This object is achieved in that radial openings are provided in the coupling sleeve, which is opposite an annular space of a fitting sleeve arranged on the coupling sleeve, which has nozzle tubes directed towards the end face of the flame spray nozzle, which are connected through the annular space to the annular gap.
  • the accelerator nozzle in the form of the nozzle tubes is thus radially spaced from the flame or the flame spray nozzle; the nozzle tubes can therefore not be overheated and certainly not melt and thus become unusable.
  • the adapter sleeve with the nozzle tubes sits directly on the union sleeve and thus forms a unit with the result when handling. Separate feed lines, in particular separate feed hoses, are not required, since the accelerator nozzle is fed from the annular gap between the flame spray nozzle and the union sleeve from the base body through the outlet openings there. At the end, where the accelerator nozzle was formerly provided between the flame spray nozzle and the union sleeve, the annular gap can now be closed without outlet openings for the accelerator gas.
  • a powder flame spraying device corresponding to the genus can also be closed be converted to a powder flame spraying device according to the invention.
  • a powder flame spraying device according to the invention instead of the previous union sleeve, such a corresponding one, but with radial openings, is now provided, on which the adapter sleeve according to the invention with the nozzle tubes is then to be arranged.
  • an end ring closing the annular gap on its end side can now be provided.
  • the coupling sleeve and the fitting sleeve are designed to be cylindrical to match one another, and a projection is arranged on the end face of the coupling sleeve as a stop for the fitting sleeve, while a thread is provided on the flame spray nozzle on the side of the fitting sleeve adjacent to the basic device body a nut is arranged with a suitable internal thread. Since the coupling sleeve itself is already removable, the adapter sleeve can also be removed from the removed coupling sleeve by first unscrewing the nut from the same. Then the adapter sleeve can be pulled off the union sleeve.
  • This embodiment is also practical when the cap sleeve is attached. Because if the nut is loosened, the adapter sleeve can be rotated in any way on the union sleeve; thus the nozzle tubes of the adapter sleeve can be rotated by the user at will and aligned accordingly.
  • the adapter sleeve can be removed from the union sleeve, specifically in the direction of the side of the adapter sleeve adjacent to the main body of the device, the outside diameter of the thread and the remaining union sleeve in particular is not larger than the inside diameter of the adapter sleeve.
  • FIG. 1 An embodiment of the invention is shown in FIG. 1 below. It is explained below.
  • the complete powder flame spraying device is not shown, but only a part of the basic device body 1 thereof, to which the coupling sleeve 25 with the flame spraying nozzle 2 is connected.
  • the flame spray nozzle 2 itself is not arranged directly on the device body 1, but is connected to the same via an adapter 26.
  • a central transport gas line 3 and fuel gas lines 4, 4 ′ emerge from the basic device body 1.
  • the gases are passed on in a manner known per se into the actual flame spray nozzle 2, where they are also mixed with one another according to the injector principle.
  • the actual flame spray nozzle 2 is held on the adapter 26 by the nozzle press screw 18 in a manner known per se.
  • the annular gap 11 is left between the adapter 26 and the flame spray nozzle 2 or the nozzle press screw 18 and the coupling sleeve 25.
  • the blow-out openings (not shown) for the accelerator gas from the device base body 1 open into this annular gap 11.
  • the annular gap 11 is closed off at the end by the end ring 15.
  • the transport gas from the transport gas line 3 is passed via a known injector pressure nozzle 5 into a corresponding, known injector gap 6 and from there it is led from the injector mixing nozzle 7 into a central transport gas line of the adapter 26; from there the transport gas with the application powder then reaches a corresponding central line in the flame spray nozzle 2, from where it exits through the powder bores 29 on the end face of the flame spray nozzle 2.
  • the fuel gas mixture is blown out and ignited in a star of fuel gas outlet bores 16 around these powder bores 29.
  • the union sleeve 25 now has radial openings 22 in the region of its end face through which the accelerator gas can escape from the annular gap 11.
  • the accelerator gas can reach the nozzle tubes 20 from the annular gap 11 through the openings 22 and the annular space 30. It emerges from the same through the compressed air outlets 14.
  • the adapter sleeve 31 is pressed against the projection 32 on the end face of the union sleeve 25. For this purpose, it is pressed on the device side by the nut 9 towards the end face of the entire arrangement.
  • the nut 9 has a thread that matches the thread 33 of the union sleeve 25.
  • the cross section shown in this figure relates to an embodiment in which the coupling sleeve 25 and the fitting sleeve 31 are designed to be cylindrical to match one another.
  • the cross section is through the central transport gas line 3, as is obvious.
  • FIG. 2 shows a special development of the powder flame spraying device, only the front part of the adapter sleeve 31 with the flame spray nozzle 2 being shown for the sake of simplicity.
  • the one with the 1 corresponding components have the same reference numerals and are not explained here.
  • the adapter sleeve 31 is shown in a position rotated by 90 angular degrees with respect to the longitudinal axis 38 relative to FIG. 1.
  • two diametrically opposite cooling nozzles 34 are provided, which on the one hand open into the annular space 30 supplied with compressed air and on the other hand protrude forward over the end face 39.
  • the nozzle tubes 20 are angled to the longitudinal axis 38, while the cooling nozzles 34 are straight and project with their front ends of the nozzle tube 20 at a predetermined distance 40.
  • the two angled nozzle tubes 20 which have already been explained are effective according to the invention as accelerator nozzles.
  • the two cooling nozzles 34 are provided in this essential embodiment.
  • a single cooling nozzle 34 can also be provided, or further cooling nozzles can also be arranged. This ensures, in a surprisingly simple manner, that overheating of the spray layer is reliably prevented as a result of the temperature radiation into the workpiece to be coated.
  • the cooling nozzle 34 is preferably exchangeable. This can be achieved in particular by means of an external thread 36 with. which the cooling nozzle 34 is screwed into a corresponding internal thread 37 of the adapter sleeve 31. Depending on the conditions of use, the cooling nozzle 34 can be removed if necessary and the threaded bore of the adapter sleeve 31 can be sealed by means of a sealing plug or the like in the context of this invention; in this case, the device explained with reference to FIG. 2 is identical in function and mode of operation to that according to FIG. 1. Both the accelerator nozzles or the nozzle tubes 20 and the cooling nozzles 34 are, according to the invention, together through the opening 22 and the annular space 30 Accelerator gas, especially compressed air, is fed. Additional supply connections or the like for the cooling nozzles are dispensed with due to the integration of cooling nozzles 34 and nozzle tubes 20 in the adapter sleeve 31.
  • the cooling nozzles 34 can also be installed in the head in such a way that they can be fed from the outside with any medium which can change to the gas state, for example with liquid nitrogen or with liquid carbon dioxide, so that an even more intensive cooling effect on the substrate can be achieved is.
  • Special nozzles for example ball-bearing nozzles, which allow the direction of exit of the cooling medium to be controlled as desired, may also be used at the outlet opening 35.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Nozzles (AREA)
  • Catching Or Destruction (AREA)

Claims (8)

1. Appareil de poudrage à flamme comprenant un corps de base (1) sur lequel est placée une buse de projection à flamme (2) comportant une tuyère d'accélération particulière à sa face frontale, qui est alimentée en gaz accélérateur à partir du corps de base, ce pour quoi il est prévu sur le corps de base des orifices d'éjection qui communiquent avec un interstice annulaire (11) entre la buse de projection à flamme (2) et un manchon de raccordement amovible (25), caractérisé en ce qu'il est prévu dans le manchon de raccordement (25) des orifices radiaux (22) en regard desquels se trouve une chambre annulaire (30) d'un manchon d'adaptation (31) placé sur le manchon de raccordement (25), qui comporte des tuyères (20) dirigées vers la face frontale de la buse de projection à flamme (2), qui communiquent avec l'interstice annulaire (11) par la chambre annulaire (30).
2. Appareil selon la revendication 1, caractérisé en ce que le manchon de raccordement (25) et le manchon d'adaptation (31) ont des conformations cylindriques mutuellement adaptées et la face frontale du manchon de raccordement (25) comporte une saillie (32) constituant une butée pour le manchon d'adaptation (31), et il est prévu du côté du manchon d'adaptation (31) voisin du corps de base (1) sur la buse de projection à flamme (2) un filetage (33) sur lequel est placé un écrou (9) comportant un taraudage adapté.
3. Appareil selon la revendication 2, caractérisé en ce que le diamètre extérieur du filetage (33) et du reste du manchon d'adaptation (31) n'est pas supérieur au diamètre intérieur du manchon d'adaptation (31).
4. Appareil selon l'une des revendications 1 à 3, caractérisé en ce que le manchon d'adaptation (31) comporte au moins une tuyère de refroidissement (34) qui est placée dans la zone de la face frontale de la buse de projection à flamme (2) et débouche dans la chambre annulaire (30).
5. Appareil selon la revendication 4, caractérisé en ce que la tuyère de refroidissement (34) dépasse de la tuyère (20) d'une distance (40) prédéterminée par son extrémité antérieure.
6. Appareil selon la revendication 4 ou 5, caractérisé en ce que l'orifice (35) de la tuyère de refroidissement (34) présente une plus grande distance à l'axe longitudinal (38) que la sortie d'air comprimé (14) de la tuyère (20), la tuyère de refrodissement (34) ayant de préférence une conformation rectiligne et la tuyère (20), de préférence une conformation coudée vers l'axe longitudinal (38).
7. Appareil selon l'une des revendications 4 à 6, caractérisé en ce que la tuyère de refroidissement (34) est disposée de façon amovible dans le manchon d'adaptation (31), en particulier au moyen d'un filetage (36) dans un taraudage (37) du manchon d'adaptation (31).
8. Appareil selon l'une des revendications 4 à 7, caractérisé en ce que la tuyère (20) et des tuyères de refroidissement (34) sont réparties uniformément sur la périphérie dans la zone de la surface frontale (39) du manchon d'adaptation (31), deux tuyères (20) ainsi que deux tuyères de refroidissement (34) étant en particulier présentes en alternant à des intervalles de 90 degrés.
EP84113717A 1983-11-19 1984-11-14 Appareil de pulvérisation par flamme de poudre comportant une buse d'accélération Expired EP0142816B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84113717T ATE39222T1 (de) 1983-11-19 1984-11-14 Pulverflammspritzgeraet mit beschleunigerduese.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8333305 1983-11-19
DE8333305U 1983-11-19

Publications (3)

Publication Number Publication Date
EP0142816A2 EP0142816A2 (fr) 1985-05-29
EP0142816A3 EP0142816A3 (en) 1986-03-26
EP0142816B1 true EP0142816B1 (fr) 1988-12-14

Family

ID=6759072

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84113717A Expired EP0142816B1 (fr) 1983-11-19 1984-11-14 Appareil de pulvérisation par flamme de poudre comportant une buse d'accélération

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EP (1) EP0142816B1 (fr)
AT (1) ATE39222T1 (fr)
DE (1) DE3475600D1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4964568A (en) * 1989-01-17 1990-10-23 The Perkin-Elmer Corporation Shrouded thermal spray gun and method
CA2119430A1 (fr) * 1993-04-20 1994-10-21 Joseph P. Mercurio Revetements d'oxyde denses realises par pulverisation a chaud
DE19742619C1 (de) * 1997-09-26 1999-01-28 Siemens Ag Verfahren und Vorrichtung zur Einbringung pulverförmiger Feststoffe oder Flüssigkeiten in ein induktiv gekoppeltes Plasma
ES2670824T3 (es) * 2011-09-30 2018-06-01 L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Procedimiento y dispositivo para descargar una corriente de medio refrigerante

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR859917A (fr) 1939-06-05 1941-01-02 Metallisation Soc Nouv Procédé et dispositifs pour assurer l'exécution de revêtements métalliques étanches et homogènes en utilisant un pistolet métalliseur
US2544259A (en) 1944-11-25 1951-03-06 Duccini Gaetano Metallizing spray gun
US3344992A (en) 1964-01-27 1967-10-03 Edward O Norris Spray gun
DE3103753A1 (de) 1980-04-14 1981-12-17 Eutectic Corp., 11358 Flushing, N.Y. Verlaengerungsstueck fuer einen flammspritzbrenner
EP0052821A1 (fr) 1980-11-26 1982-06-02 The Perkin-Elmer Corporation Appareil pulvérisateur à flamme à accélération de fusée

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1084684A (fr) * 1953-06-10 1955-01-21 Metallisation Soc Nouv Chalumeau ou pistolet métalliseur
US3085750A (en) * 1960-12-29 1963-04-16 Metallizing Company Of America Molten material spray gun with laterally deflecting air cap
US3455510A (en) * 1966-11-14 1969-07-15 Metco Inc Nozzle and gas mixing arrangement for powder type flame spray gun
CA982237A (en) * 1971-07-06 1976-01-20 Derek J. Angier Method and apparatus for projecting materials into an arc discharge
US4308996A (en) * 1980-03-17 1982-01-05 Eutectic Corporation Adjustable head for selectively shaping a flame-spray discharge
DE3024339A1 (de) * 1980-07-02 1982-01-21 NPK za Kontrolno-Zavaračni Raboti, Sofija Plasmatron fuer metallbearbeitung in luft und unter wasser

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR859917A (fr) 1939-06-05 1941-01-02 Metallisation Soc Nouv Procédé et dispositifs pour assurer l'exécution de revêtements métalliques étanches et homogènes en utilisant un pistolet métalliseur
US2544259A (en) 1944-11-25 1951-03-06 Duccini Gaetano Metallizing spray gun
US3344992A (en) 1964-01-27 1967-10-03 Edward O Norris Spray gun
DE3103753A1 (de) 1980-04-14 1981-12-17 Eutectic Corp., 11358 Flushing, N.Y. Verlaengerungsstueck fuer einen flammspritzbrenner
EP0052821A1 (fr) 1980-11-26 1982-06-02 The Perkin-Elmer Corporation Appareil pulvérisateur à flamme à accélération de fusée

Also Published As

Publication number Publication date
ATE39222T1 (de) 1988-12-15
DE3475600D1 (en) 1989-01-19
EP0142816A3 (en) 1986-03-26
EP0142816A2 (fr) 1985-05-29

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