AUTOMATIC SYSTEM FOR THERMAL TREATMENT OF PIPES Russian patent published in 1996 - IPC

FIELD: metallurgy. SUBSTANCE: automatic system for thermal treatment of pipes can be used directly on technological object which excludes necessity of its disassembly. System has inductor 3 mounted on mobile gear 2 which moves along pipe 1 due to connection of carriage to drive 4 with the aid of swing joint. In process of thermal treatment transducers 12 and 13 measure present temperature of pipe in zone of thermal treatment, temperature is compared with preset one and if it deviates from specified value either power fed into inductor 1 or rate of movement of mobile gear 2 changes. To prevent oxidization of inner surfaces of pipes there are provided sealing means connected with vacuum line 9 to roughhing-down pump. EFFECT: enhanced quality of pipes treated thermally. 2 cl, 1 dwg