Special driller for on-site working furnace cooling wall

The utility model provides a special driller for the on-site working of furnace cooling walls, composed of a main drive chain, an auxiliary drive chain and an auxiliary rotary device. The main drive chain is composed of a motor, a belt pulley, a cycloidal retarder, a gear pair and a drill stem, the auxiliary drive chain is composed of a drill stem, a gear pair, a leading screw, and a drill stem differential feed device, and the auxiliary rotary device is composed of a drill stem entire rotary system. The special driller is suitable for the on-site working of cooling walls which have the fault of cooling pipe blocking on a blast furnace so as to ensure the blast furnace operate normally. With small size, and light labour intensity, the driller can meet the requirement for operating under narrow construction environment.