| 摘要 |
<p>The present invention relates to a head for a gas cutting torch, which is capable of maximally restraining a backfiring state into the head while at the same time smoothly spurting mixed gas with the smallest pressure change for a mixed gas path inside a head frame, in a nozzle mixing the way that preheated oxygen for heating a processed material and fuel gas are mixed in a nozzle and spurted to a tip. In accordance with the present invention, a head for a gas cutting torch comprising a valve bundle in which fuel gas and oxygen in a gas state flow, respectively, to include the head and a nozzle bundle coupled to the valve bundle, is configured in that an injector is mounted on a preheat oxygen pipe and a fuel gas pipe composing the nozzle bundle; a mixed gas pipe is coupled to a head frame for supplying mixed gas flowing to be generated from the injector; a cutting oxygen flow path and a mixed gas flow path are formed on the head frame to be connected to a cutting oxygen passage and a mixed gas passage of a tip, respectively; and a cross-section area of the mixed gas pipe of the nozzle bundle is equal to a cross-section area of the mixed gas flow path formed in the head frame or a change in the cross-section is minimized.</p> |
