BURNER UNIT (VERSIONS)

FIELD: gas burning devices; treatment of metals and glass. ^ SUBSTANCE: proposed burner works on acetylene substitute gases, for example propane-butane, natural gas, and the like. Burner unit has head with oxygen and combustible mixture supply passage, tip and nozzle mounted coaxially at circular clearance; located between tip and nozzle in taper circular clearance is centering element for passage of combustible mixture which is provided with longitudinal passages on its outer surface in form of taper stepped bush dividing the taper circular clearance between outlet part of tip and nozzle into two circular chambers interconnected by means of radial holes; said element may be made in form of taper bush with stepped longitudinal passages divided into inlet and outlet parts by means of circular bore whose inner circular surface is provided with radial holes used for connection of cavity of circular bore with circular cavity between bush and tip; element may be also made in form of taper bush with longitudinal stepped and straight alternating passages; each outlet part of stepped passage has radial hole connecting the passage with circular cavity between bush and tip; cross-sectional areas of inlet and outlet parts of longitudinal stepped passages ranges from 1/2 to 1/4. ^ EFFECT: enhanced operational efficiency. ^ 5 cl, 6 dwg