Smoke collecting device of rough smelting furnace

The smoke collecting device is characterized in that an upper bevel gear is fixedly connected to the lower end face of an upper rotating disc through a connecting rod, a lower bevel gear is fixedly connected to the upper end face of a lower rotating disc through a connecting rod, the upper rotating disc, the upper bevel gear, the lower bevel gear and the lower rotating disc are concentrically arranged, and through holes allowing round rods to penetrate through are formed in the centers of the upper bevel gear and the lower bevel gear; an output shaft of the forward and reverse rotation motor extends to one side of the round rod, the tail end of the output shaft of the forward and reverse rotation motor is fixedly connected with a driving bevel gear meshed with the upper bevel gear and the lower bevel gear, the right side of the peripheral face of the upper rotary disc and the right side of the peripheral face of the lower rotary disc are each fixedly connected with a smoke collecting pipe, and a metal hose is