Induced draft fan

The induced draft fan comprises a base, a bearing plate is arranged on the upper side of the base, an induced draft fan body is fixedly connected to the upper side of the bearing plate, universal wheels with a self-locking function are installed on the lower side of the base, a vertically-arranged stud is rotationally connected to one side of the bottom of the bearing plate, and the lower end of the stud penetrates through the base. A vertically-arranged guide rod is fixedly connected to one side of the bottom of the bearing plate, the bottom end of the guide rod penetrates through the base, the upper surface of the base is rotationally connected with a first worm gear, the stud is in threaded connection with the first worm gear, one side of the upper surface of the base is rotationally connected with a first worm, and the first worm is meshed with the first worm gear. By means of the universal wheels, the base can be conveniently moved, the base drives the induced draft fan body to move, follow-up installati