US 4,114,863 AGranted

Thermal torch and method

OwnerPatsie Carmen Campanainventor

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Abstract

A new and improved thermal torch or lance and method for boring, cutting, burning and the like of hard base materials which facilitates concentrating and intensifying the thermic reaction thereof. The arrangement includes an elongated hollow inner sleeve or casing generally coextensively received within an elongated hollow outer sleeve or casing with the two casings being dimensioned so that a first gas flow passage is defined therebetween over the cooperative lengths thereof. At least one elongated rod is received within the inner casing in a manner defining at least one second gas flow passage over the cooperative lengths thereof. In operation oxygen is passed under pressure through the first and second passages from the torch inlet end to and outwardly from the torch discharge end. Oxygen passing outwardly from the second passage cooperates in the thermic reaction as is conventional in prior thermal torches. Oxygen passing outwardly from the first passage acts as a gas envelope surrounding the primary thermic reaction to thereby confine and intensify it.

Claims10

Dependent claims

A consumable thermal torch for boring, cutting, burning and the like of hard base materials, said torch comprising:

an elongated open ended hollow outer casing having an inlet end, a discharge end and a generally smooth inner wall;
an elongated open ended hollow inner casing having an inlet end, a discharge end and a generally smooth outer wall, the outside cross-sectional dimension of said inner casing being less than the inside cross-sectional dimension of said outer casing with said inner casing being received within said outer casing;
means for affixing said inner and outer casings together such that the inlet and discharge ends of said inner and outer casings are generally coextensive with each other with a first gas flow passage defined between the outer surface of said inner casing and the inner surface of said outer casing over the cooperative lengths thereof between said inlet and discharge ends, said first gas flow passage at least substantially surrounding said inner casing in a continuous manner;
at least one elongated burning rod received within said inner casing extending generally coextensive therewith between the inlet and discharge ends thereof, said at least one rod having an outer cross-sectional dimension less than the inner cross-sectional dimension of said inner casing such that at least one second gas flow passage is created therebetween over the cooperative lengths thereof;
and, said first gas flow passage generating a cas curtain which selectively flows longitudinally outward thereof at said inner and outer casing discharge ends from a gas flow introduced under pressure into at least said first gas flow passage adjacent said inner and outer casing inlet ends at least during torch operation, said gas curtain at least substantially surrounding said inner casing discharge end in a continuous manner for confining and concentrating a thermic action of said burning rod at said inner casing discharge end.

2 more elements

In a thermal torch of the type employed for boring, cutting, burning and the like of hard base materials wherein said torch includes a first smooth outer walled elongated hollow casing having inlet and discharge ends and at least one burning rod member extending therethrough generally coextensive therewith between said inlet and discharge ends with at least one first gas flow passage provided between said at least one rod and first casing longitudinally over the coextensive lengths thereof and wherein a gas flow is selectively introduced under pressure into said first gas flow passage at least adjacent said first casing inlet end for promoting a thermic action for said lance in said at least one rod and first casing at said first casing discharge end, the improvement comprising:

a second smooth inner walled elongated hollow casing having inlet and discharge ends received over said first casing in a surrounding relationship therewith, said second casing including means for fixedly mounting it relative to said first casing such that the inlet and discharge ends of said casings are generally coextensive with each other, said second casing further having an inner cross-sectional dimension greater than the outer cross-sectional dimension of said first casing such that a second gas flow passage is defined therebetween generally longitudinally over the cooperative lengths thereof and which second gas flow passage at least substantially surrounds said first casing in a continuous manner, said second gas flow passage being operably connected to said gas flow for generating a gas curtain flowing axially outward of said lance at said first and second casing discharge ends to substantially surround the first casing discharge end in a continuous manner for confining and intensifying the thermic action of said lance at said one rod and first casing discharge end.

Dependencies are inferred from the claim text.