Dredging device for pyrometallurgy negative pressure tank

The utility model discloses a dredging device for a pyrometallurgy negative pressure tank, which comprises a body, the top of the body is fixedly connected with an inlet, the top of the inlet is provided with a second flange ring, the top of the second flange ring is provided with a first support plate, and the bottom of the first support plate is fixedly connected with a limiting column. The bottom of the limiting column is slidably connected with two limiting columns, the bottoms of the two limiting columns are fixedly connected with the same knocking cone, the surfaces of the sides, close to the sliding column, of the two knocking cones are fixedly connected with a restraining column, the surface of the restraining column is provided with an adjusting mechanism used for adjusting the knocking cones, and the surfaces of the limiting columns are sleeved with rotating shafts. A rotating mechanism used for rotating the rotating shaft is arranged at the top of the rotating shaft, the four connecting arms are ar