Autogenous flame spraying apparatus for the flame spraying of po

Fluid sprinkling – spraying – and diffusing – With means fusing solid spray material at discharge means

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Details

239 85, 2391325, B05B 704, B05B 720

Patent

active

052073823

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The invention relates to an autogenous flame spraying apparatus for the flame spraying of powder-form materials or spray powder.
Known flame spraying apparatuses of that kind, with injectors for mixing combustion gas and oxidation gas are designed for a given amount of combustion gas mixture, due to the structural configuration thereof, and are fairly complicated in terms of their design configuration. In particular the torch or burner body in the known constructions can only be manufactured with a great deal of difficulty with the desired degree of accuracy in regard to the components which are critical from the point of view of the torch function. Hitherto it has not been possible to increase the degree of structural accuracy and to achieve adaptability of individual components for an extended range of use in respect of the melting point of the various materials in powder form.
In consideration of those aspects the inventor set himself the aim of providing a flame spraying apparatus which is considerably simplified in regard to the structure of its torch body, while permitting inexpensive manufacture with a high degree of accuracy. In addition the invention seeks to provide that the flame spraying apparatus according to the invention covers a wide range of possible uses, that is to say, it can be adapted to a very wide range of spray materials and modes of use.


SUMMARY OF THE INVENTION

That object is attained by an autogenous flame spraying apparatus for the flame spraying of powder-form materials or spray powder by means of a torch or burner nozzle associated with supply lines for the spray powder and for combustion gas, oxidation gas and acceleration gas or mixtures thereof, on a torch body comprising at least two interchangeable main portions, on one of which are provided a nozzle carrier for the releasable torch nozzle and a connection for a powder feed and ducts for the spray powder and carrier gas, wherein the interchangeable nozzle carrier has at least one injector for mixing of the combustion gas and the oxidation gas and ducts for the feed of the gas mixture and a mixture of spray powder/carrier gas to the torch nozzle, whereas provided on/in the other main portion of the torch body are connections for the supply of the combustion gas, oxidation gas and acceleration gas. In addition, regulating valves for the ducts for combustion gas, oxidation gas and acceleration gas are to be associated with said further main portion - that being either outside the actual main portion or however integrated into ducts thereof.
For that purpose, it has been found desirable to provide a separation plane in respect of the torch body, at which 0-rings are provided for gas sealing purposes at the transition between the two main portions of the torch body.
A further separation plane permits fitment of the nozzle carrier to the torch body, while at least one plug element which engages into said body for the non-rotatably fixed nozzle carrier passes through the separation plane.
Moreover the main portions of the torch body are advantageously connected by a holding or clamping means, by means of which interposed sealing elements can be clamped in position.
It has been found advantageous for the described separation planes to be disposed substantially perpendicularly to each other, but in certain constructions they may also be disposed in mutually opposite relationship.
In regard to further features, attention is directed to the claims.
Such a design configuration for the flame spraying apparatus makes it possible for the torch body to be made up on the one hand from a portion which can be produced by machining and in particular by boring of a workpiece of bar material and the degree of accuracy of which is therefore readily sufficient, and on the other hand from a portion which only has the supply and possibly regulating means for the various gases required. In addition it is possible to arrive at a completely modular configuration in respect of the entire flame spraying apparatus and th

REFERENCES:
patent: 2286191 (1942-06-01), Aitchison et al.
patent: 2510143 (1950-06-01), Sandora et al.
patent: 2544259 (1951-03-01), Duccini et al.
patent: 2861900 (1958-11-01), Smith et al.
patent: 3073528 (1963-01-01), Wilson et al.
patent: 3085750 (1963-04-01), Kenshol
patent: 4317540 (1982-03-01), Simm et al.

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