WATER-TO-AIR COOLER Russian patent published in 2007 - IPC C21D1/667 C21D9/50 

FIELD: pipe rolling process; cooling welded joints of drill pipes during heat treatment in production lines.

SUBSTANCE: proposed device includes water and air supply passages with mixing chamber connected to them; mixing chamber is provided with water and air inlet branch pipes; mixing chamber is connected with nozzles by means of outlet branch pipe. Air inlet branch pipe is made in form of inner and outer branch pipes located coaxially one in other in mixing chamber; these branch pipes are provided with individual air supply passages. Inner branch pipe is connected with water inlet branch pipe through nozzle orifice; outer branch pipe is provided with spraying screen on outlet side; mixing chamber is provided with flow distributor located symmetrically along its axis and provided with outlet branch pipes with contraction tube mounted inside them before nozzles. Inner air inlet branch pipe is movable; mixing chamber is telescopic in construction. Nozzle is mounted at outlet of air inlet branch pipes.

EFFECT: enhanced control of cooling drill pipes in heat treatment lines.

4 cl, 3 dwg, 1 tbl