Combustion – Means at chamber outlet establishing combustion pressure... – Chamber outlet forms jet nozzle
Patent
1982-08-16
1985-01-22
Dority, Jr., Carroll B.
Combustion
Means at chamber outlet establishing combustion pressure...
Chamber outlet forms jet nozzle
431764, 431352, F23Q 30
Patent
active
044949251
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to gas burners, and, more specifically, to devices for gas jet cutting of materials.
BACKGROUND ART
The basic requirements to gas jet cutting equipment employed in rescue and recovery operations include independent functioning, light weight and small size providing for hand transportation, nontoxicity of fuel combustion products, high efficiency and quick starting.
Apart from that, efficient cutting of heterogeneous materials, such as those used for manufacture of airplane skin requires that the gas jet speed be sufficiently high, i.e., above the sonic speed, and that the gas temperature be of the order of +2500.degree. C.
Known in the art is a device for gas jet cutting of materials (USSR Inventor's Certificate No. 258206, IPE E21C 21/00, Journal "Discoveries, Inventions, Industrial Designs and Trade Marks", 1973, No. 41) comprising a head, whose case accommodates a combustion chamber furnished with a cutting gas jet nozzle, and injectors for delivery of fuel and oxidizer into the combustion chamber.
That prior-art device is designed for working rock, for example, granite and quartz rock, by thermal treatment with a high-temperature and high-speed gas jet.
For setting the required parameters of the gas jet, the combustion chamber of the above-mentioned device is relatively large.
The device uses gasoline or kerosene and air as fuel and oxidizer, respectively.
The fuel-air mixture is ignited on the side of the nozzle by means of an external igniter.
The foregoing design of the device for gas jet cutting of materials does not permit the use thereof for rescue and recovery work in transport because of its heavy weight and large size.
In addition, the prior-art device cannot be efficiently employed for rescue and recovery operations because of its low performance, toxicity of combustion products and long period of preparation before use.
DISCLOSURE OF THE INVENTION
The present invention is essentially aimed at providing a device for gas jet cutting of materials, in which due to distribution of gas temperature in the head case it becomes possible to reduce the size thereof and to use the device for rescue and recovery operations in transport.
With this in view, the device for gas jet cutting of materials according to the invention includes a head, the case of which accommodates a combustion chamber having a nozzle for ejecting a cutting gas jet, and with injectors for feeding fuel and oxidizer into the combustion chamber, wherein the head incorporates a secondary combustion chamber fitted with fuel and oxidizer injectors and an igniter, and axially aligned inside the head with the primary combustion chamber, and wherein the combustion chambers are interconnected by a passage communicating with an injector serving for delivery of oxidizer into the primary combustion chamber.
The device for gas jet cutting of materials, according to the present invention, comprises a head, whose length is at least thrice less than that of the heads of prior-art devices. Thus, although the weight and size of the proposed device for gas jet cutting of materials are small, the parameters of the cutting gas jet are nevertheless high for efficient cutting of various materials.
The foregoing features provide for effective application of the gas jet cutting device in rescue and recovery work in transport.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in greater detail with reference to a preferred embodiment thereof taken in conjunction with the accompanying drawings, wherein:
FIG. 1 is a general longitudinal cut-away view of a device for gas jet cutting of materials according to the invention;
FIG. 2 is a section view of the device taken along line II--II of FIG. 1, according to the invention.
DETAILED DISCLOSURE
Referring now to FIG. 1, a device for gas jet cutting of materials comprises a head 1 designed for producing a high-temperature high-speed gas jet serving to cut materials. The head 1 incorporates a cylindrical gas producer 2, whose interior co
REFERENCES:
patent: 3463601 (1969-08-01), Childree
patent: 3666393 (1972-05-01), Davies
Buryakov Valery M.
Kosenko Alexandr I.
Kozlov Sergei P.
Levin, administratrix by Sofia N.
Levin, deceased Viktor Y.
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