EP0277158B1 - Flammspritzbrenner zur verarbeitung pulver- oder drahtförmiger spritzwerkstoffe - Google Patents

Flammspritzbrenner zur verarbeitung pulver- oder drahtförmiger spritzwerkstoffe Download PDF

Info

Publication number
EP0277158B1
EP0277158B1 EP87904833A EP87904833A EP0277158B1 EP 0277158 B1 EP0277158 B1 EP 0277158B1 EP 87904833 A EP87904833 A EP 87904833A EP 87904833 A EP87904833 A EP 87904833A EP 0277158 B1 EP0277158 B1 EP 0277158B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
duct
injector
mixing chamber
gas
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
EP87904833A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0277158A1 (de
Inventor
Wolfgang Simm
Peter Sommer
Philippe Delaplace
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.)
ECG Immobilier SA
Original Assignee
Castolin SA
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 Castolin SA filed Critical Castolin SA
Priority to AT87904833T priority Critical patent/ATE68999T1/de
Publication of EP0277158A1 publication Critical patent/EP0277158A1/de
Application granted granted Critical
Publication of EP0277158B1 publication Critical patent/EP0277158B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/129—Flame spraying

Definitions

  • the invention relates in particular to a flame spray burner for processing powder or wire-shaped spray materials with a burner body and a burner head, the burner body having feed devices for the spray material and for a fuel gas and an oxidation gas, and the burner head having one with a plurality of gas nozzle channels and at least one channel for the spray material provided nozzle part and a nozzle carrier part, which are connected to each other and - if necessary via an interchangeable connecting part - with the burner body, the nozzle carrier part at least one spray material in connection with the corresponding channel for the spray material in the nozzle part and with the corresponding feed device in the burner body Has delivery channel, wherein the nozzle carrier part (2) has at least two injectors, each of which opens into a corresponding injector mixing chamber (10) oxidation have gas inlet bore (11), the nozzle carrier part (2) furthermore having a fuel gas inlet bore (8) which opens laterally into the injector mixing chamber (10) for each injector mixing chamber (10) and which has a fuel gas duct (7) in Connection is established,
  • Flame-tip burners of this type for powdery spray materials are known, for example, from the document DE-C-825197.
  • the arrangement described there has oxidizing gas inlet bores which run through the nozzle support part.
  • the precision of the oxidation gas injection is severely limited, as is that dependent exit velocity of the gas and thus the performance of the burner. This applies in particular to maintaining a precise exit speed over a long period of time.
  • injectors have a relatively short service life and are fundamentally not interchangeable, but only with the entire nozzle carrier part, which is a disadvantage in the case of repairs and in the event of a desired change in the flame profile.
  • the object of the invention is to eliminate the disadvantages mentioned and, in particular, to provide a flame spray burner which enables a substantially greater precision of the setting and long-term maintenance of a precise supply of oxidizing gas and thus the corresponding burner output. Furthermore, the life of the injectors should be increased.
  • the oxidizing gas inlet bores each run in injector nozzles which have an insert made of oxide ceramic material in amorphous or crystalline form, in which the oxidizing gas inlet bore runs at least in the vicinity of the mouth or by the fact that the oxidizing gas Inlet bores each run in injector nozzles, which are essentially made of oxide-ceramic material in amorphous or crystalline form or from a hard material or hard metal.
  • the oxide ceramic material is preferably in the form of a single crystal.
  • the ratio of the outlet velocities of the oxidation gas and the fuel gas from the corresponding inlet bores opening into an injector mixing chamber is between 2 and 15, preferably between 2.5 and 13.
  • the outlet velocity of the oxidation gas can be between 500 and 650 m / sec and the corresponding exit velocity of the fuel gas between 50 and 200 m / sec.
  • the oxidation gas pressure is preferably between 2 and 5 bar and the corresponding fuel gas pressure between 0.5 and 2.5 bar.
  • the burner according to FIGS. 1 and 2 is an autogenous powder flame spray burner with a burner body 1 and a burner head, which in turn comprises a nozzle carrier part 2 and a nozzle part 3.
  • the nozzle holder part 2 which is cylindrical in its basic form, is connected to a likewise cylindrical part of the burner body 1 or to a corresponding separable connecting part by a union nut 4, while a union nut 5 connects the coaxial parts 2 and 3 to one another in a similar manner.
  • the burner body 1 is supplied with a mixture of a flame spray powder with a carrier gas, e.g. Oxygen or air, as well as acetylene as fuel gas and oxygen as oxidation gas.
  • a carrier gas e.g. Oxygen or air
  • acetylene as fuel gas and oxygen as oxidation gas.
  • the burner body may have connection, control and shut-off devices for these gases and the wettable powder.
  • a supply channel 15 indicated by dashed lines in the burner body serves for supplying the powder / carrier gas mixture to the burner head and continues in a corresponding channel 16 of the nozzle carrier part and a channel 17 of the nozzle part. Furthermore, the burner body or the connection part 1 has three separate feed channels, such as 13, for acetylene and three separate feed channels, such as 14, for oxygen, which are also indicated by dashed lines and run parallel to the channel 15.
  • the nozzle carrier part 2 has three fuel gas channels, such as 7, which connect to the corresponding channels 13 of the burner body 1. These channels are preferably arranged at equal angular distances from one another, but other arrangements are also possible, as is one of three different numbers of the respective channels, for example two or four.
  • the fuel gas channels 7 in the nozzle carrier part are designed as blind bores and each continue in a fuel gas inlet bore 8 which crosses the corresponding blind bore and opens into an injector mixing chamber 10.
  • this bore 8 extends from the circumference of the part 2, for example made of brass, and is closed to the outside with the aid of a steel ball pressed into the outer section of the bore. This version represents a very favorable one from the point of view of the cost-effectiveness of production as well as operational safety Solution.
  • the injector mixing chamber 10 is also connected to the oxygen supply channel 14, specifically via an oxidation gas channel 12 and an oxidation gas inlet bore 11, which run in an injector nozzle 60.
  • the injector nozzle 60 and the injector nozzles 61, 62 corresponding to the two other separate oxidation gas channels are screwed into the nozzle carrier part and are accessible and replaceable from the connection side of the burner body.
  • the injector nozzles protrude with a frustoconical part into the corresponding injector mixing chamber, such as 10, which has a cylindrical cut and a substantially conical taper and merges into an injector outlet channel 20.
  • the axes of the oxygen inlet bore and the acetylene inlet bore cross each other near the end face of the injector nozzle in the cylindrical cut of the chamber and form an angle of approximately 90 °. According to another embodiment, this angle is between 30 ° and 90 °, the lowest value corresponding to the angle of inclination of the generatrix of the frusto-conical injector nozzle part.
  • the inlet bore for oxygen in the injector nozzle is designed as a calibrated bore.
  • the flow rate of this gas can thus be adjusted with the aid of the gas pressure in the feed device, and other means, such as 'flow meter', for determining this flow rate are eliminated.
  • the exit velocity of the gases from the inlet bores to the injector mixing chamber is thus also determined by the set gas pressure and is, for example, 500 to 650 m / sec for oxygen and Acetylene 50 to 200 m / sec.
  • the ratio of the two exit speeds is preferably between 2 and 15, in particular between 2.5 and 13.
  • the oxygen pressure is 3.0 bar and the exit speed from the injector nozzle with a calibrated bore of 0.45 mm diameter is 550 m / sec.
  • An acetylene inlet bore of 1 mm in diameter at an angle of 90 ° causes a fuel gas outlet speed of 130 m / sec at a pressure of 0.7 bar.
  • the delivery rate of the burner per injector is 330 1 / min.
  • Replacing the injector nozzles allows the burner output to be changed. For example, an increase in the diameter of the oxygen inlet bore to 1 mm at a constant pressure of 3.0 bar, and thus an exit speed of 600 m / sec, increases the output per injector to 700 1 / min.
  • the diameter range of the calibrated inlet bores which have a minimum length of 0.2 mm, is between 0.1 and 1.5 mm.
  • the angle between the axes of the inlet bores is 30 ° instead of 90 °, for example, the same flow rate of the fuel gas is achieved at a pressure of 0.6 bar instead of 0.7 bar.
  • the mixing of the gases proves to be optimal if the angle mentioned is at least approximately 90 °.
  • the injector nozzle is designed in two parts in such a way that, at least in its mouth-side trim, it has an outer jacket part made of metal and an inner part made of oxide-ceramic material or hard material or hard metal, in which the calibrated oxidation gas inlet channel passed.
  • the inner part preferably consists of ruby, quartz glass or other oxide-ceramic materials in monocrystalline or polycrystalline form.
  • a number of gas nozzle channels 18 are arranged in the nozzle part 3, which have an acceleration part 19 at their mouth-side end and emanate from a corresponding distribution chamber 21 at their input-side end.
  • a distribution chamber connects, for example, a group of gas nozzle channels to a single injector outlet channel. Often, however, all gas nozzle channels are connected to all injector outlet channels via an annular distribution chamber 21.
  • FIGS. 3 and 4 The embodiment according to FIGS. 3 and 4 is constructed similarly to that of FIGS. 1 and 2 and practically identical parts are identified by the same reference numbers.
  • the nozzle carrier part 22 of FIG. 3 forms two annular distribution channels 70 and 120 for the fuel gas and for the oxidation gas, respectively, via which these gases are fed to the individual separate injector mixing chambers, such as 10.
  • the fuel gas inlet bores, such as 80, extend here from the respective mixing chamber to the fuel gas distribution channel 70, which is formed between an annular cutout on the circumference of the nozzle carrier part 22 and the inner wall of a fastening sleeve 40.
  • the nozzle carrier part 22 is screwed into the fastening sleeve 40 and is sealingly connected to it by means of an O-ring 41.
  • each of the injector nozzles such as 63, is inserted into a corresponding bore in the nozzle carrier part, which starts from the annular oxidation gas distribution channel 120. This is milled into the flat connecting surface of the nozzle carrier part.
  • a sealing washer 23 for example made of plastic, is arranged, which is centered by the sleeve 40 from its periphery and has a number of openings or recesses for the passage of the gases and the spray material.
  • the burner body or connection part 100 has in particular a central feed channel 15 for the spray material, which is connected to the corresponding channel 16 of the nozzle carrier part via an opening 231 in the sealing disk, and a feed channel 140 for oxygen as the oxidizing gas, this feed channel leading into the distribution channel 120 essentially opposite annular channel 141 opens.
  • the sealing washer 23 has individual openings at the level of these two channels, but closed annular parts of the sealing washer ensure a seal in the radial direction both on the inner and on the outer circumference of these channels.
  • Another channel 130 in the burner body or connecting part 100 is used to supply the fuel gas to an annular groove 131 on the circumference of the part 100, which is open on the one hand towards the sealing washer 23 and on the other hand sealed against the sleeve 40 with the help of an O-ring 42.
  • the sealing disk 23 has individual cutouts 233 on its circumference in order to allow the gas flow between 131 and 70.
  • connection described is characterized by its structural simplicity and great operational reliability, even in the case of replacement of individual parts such as the nozzle part, the nozzle carrier part and the connecting part at the place of use.
  • the total volume of fuel gas oxidation gas delivered is distributed over a plurality of injector mixing devices which are separate from one another. This division is in case of a possible flashback
  • One of the gas paths is of great advantage, since the effect of such a flashback or reignition is limited to the corresponding partial volume, which considerably reduces the risk not only in terms of its frequency, but also in terms of its scope.
  • the described arrangement of the injector nozzles in the nozzle carrier part allows, in particular, simple replacement thereof, either individually or together with the nozzle carrier part as a whole. This allows the burner's output to be adapted relatively easily to any specific application and, if necessary, also to change the flame profile over the circumference of the nozzle part.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
  • Nozzles (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)
  • Coating By Spraying Or Casting (AREA)
EP87904833A 1986-08-15 1987-08-14 Flammspritzbrenner zur verarbeitung pulver- oder drahtförmiger spritzwerkstoffe Expired - Lifetime EP0277158B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87904833T ATE68999T1 (de) 1986-08-15 1987-08-14 Flammspritzbrenner zur verarbeitung pulveroder drahtfoermiger spritzwerkstoffe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3292/86A CH671345A5 (enrdf_load_stackoverflow) 1986-08-15 1986-08-15
CH3292/86 1986-08-15

Publications (2)

Publication Number Publication Date
EP0277158A1 EP0277158A1 (de) 1988-08-10
EP0277158B1 true EP0277158B1 (de) 1991-10-30

Family

ID=4252827

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87904833A Expired - Lifetime EP0277158B1 (de) 1986-08-15 1987-08-14 Flammspritzbrenner zur verarbeitung pulver- oder drahtförmiger spritzwerkstoffe

Country Status (5)

Country Link
EP (1) EP0277158B1 (enrdf_load_stackoverflow)
AT (1) ATE68999T1 (enrdf_load_stackoverflow)
CH (1) CH671345A5 (enrdf_load_stackoverflow)
DE (1) DE3774262D1 (enrdf_load_stackoverflow)
WO (1) WO1988001203A1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8908954U1 (de) * 1989-06-03 1990-09-27 Castolin S.A., Lausanne-St. Sulpice, Waadt/Vaud Autogenes Flammspritzgerät zum Flammspritzen von pulverförmigen Werkstoffen bzw. Spritzpulver
DE4440701A1 (de) * 1994-11-15 1996-05-23 Ruediger Haaga Gmbh Behälter mit einem Behältermantel und einer Stirnwand
RU2146582C1 (ru) * 1998-11-02 2000-03-20 Казаков Владимир Михайлович Способ и устройство для обработки поверхностей деталей газопламенным напылением

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2397165A (en) * 1943-10-25 1946-03-26 Metallizing Engineering Co Inc Gun construction for gas blast spraying heat-fusible materials
FR1084684A (fr) * 1953-06-10 1955-01-21 Metallisation Soc Nouv Chalumeau ou pistolet métalliseur
US2920001A (en) * 1955-07-11 1960-01-05 Union Carbide Corp Jet flame spraying method and apparatus
US2862498A (en) 1957-06-14 1958-12-02 Don J Weekes Endotracheal tube
FR1470135A (fr) * 1965-02-25 1967-02-17 Metallisation Ltd Perfectionnements apportés aux appareils pulvérisateurs de métal
US4050466A (en) 1975-10-08 1977-09-27 Koerbacher Kathleen C Endotracheal tube
US5174283A (en) 1989-11-08 1992-12-29 Parker Jeffrey D Blind orolaryngeal and oroesophageal guiding and aiming device
US5414075A (en) 1992-11-06 1995-05-09 Bsi Corporation Restrained multifunctional reagent for surface modification

Also Published As

Publication number Publication date
CH671345A5 (enrdf_load_stackoverflow) 1989-08-31
ATE68999T1 (de) 1991-11-15
EP0277158A1 (de) 1988-08-10
WO1988001203A1 (en) 1988-02-25
DE3774262D1 (de) 1991-12-05

Similar Documents

Publication Publication Date Title
DE68901951T2 (de) Luftzerstaeubungsgeraet fuer fluessigkeiten.
EP0698418B1 (de) Verfahren und Vorrichtung zur gleichzeitigen Dispergierung und Zerstäubung von mindestens zwei Flüssigkeiten
EP1243343B1 (de) Zweistoffsprühdüse
DE10304386A1 (de) Doppelfluid-Verwirbelungsdüse mit selbstreinigendem Zapfen
DE1725022C3 (de) Flammspritzspistole
DE3514287A1 (de) Druckluft-betriebene spruehduese
DE8908954U1 (de) Autogenes Flammspritzgerät zum Flammspritzen von pulverförmigen Werkstoffen bzw. Spritzpulver
CH685477A5 (de) Vorrichtung zum Flammspritzen von pulverförmigen Werkstoffen mittels Stichflamme.
DE3321697C2 (enrdf_load_stackoverflow)
DE3006558C2 (enrdf_load_stackoverflow)
EP0762057B1 (de) Einrichtung zur Vermischung von Brennstoff und Luft für Brennkammern von Gasturbinentriebwerken
EP0221914B1 (de) Flammspritzbrenner zur verarbeitung pulver- oder drahtförmiger spritzwerkstoffe
EP0277158B1 (de) Flammspritzbrenner zur verarbeitung pulver- oder drahtförmiger spritzwerkstoffe
EP0386732A2 (de) Verbrennungseinrichtung für einen Zweistoffbrenner
DE2552864C2 (de) Brenner für flüssige Brennstoffe
EP0751346B1 (de) Gasmischende Brennschneiddüse
DE1907169A1 (de) Steuerventil zur Regelung von Gasstroemungen,insbesondere fuer Flammspritzpistolen
DE3918200A1 (de) Autogenes flammspritzgeraet zum flammspritzen von pulverfoermigen werkstoffen bzw. spritzpulver
DE3635698A1 (de) Flammspritzbrenner zur herstellung von oberflaechenschichten auf werkstuecken
DE891481C (de) Geraet zum Zerstaeuben von pulverisiertem Material
DE3922343C2 (enrdf_load_stackoverflow)
DE68907846T2 (de) Luftzerstäubergerät für Flüssigkeiten mit flachem Spritzstrahl.
DE1752502C (de) Brenner zum autogenen Auftragsschweis sen
DE1752502B1 (de) Brenner zum autogenen Auftragsschweissen
DE10257809A1 (de) Zweistoffdüse

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE FR GB IT

17P Request for examination filed

Effective date: 19880712

17Q First examination report despatched

Effective date: 19890510

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR GB IT

REF Corresponds to:

Ref document number: 68999

Country of ref document: AT

Date of ref document: 19911115

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3774262

Country of ref document: DE

Date of ref document: 19911205

ITF It: translation for a ep patent filed
ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19940708

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19940726

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19940826

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19950814

Ref country code: AT

Effective date: 19950814

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950814

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19960430

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20011020

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF THE APPLICANT RENOUNCES

Effective date: 20020412

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050814