Sealing device of tubular belt conveyor

The utility model relates to a tubular belt conveyor, in particular to a sealing device of the tubular belt conveyor. Frames are arranged on the two sides of a tubular conveying belt of the tubular belt conveyor respectively, each frame is of a truss structure, a plurality of sealing devices are closely arranged on the outer sides of the frames, each sealing device comprises a sealing frame and a transparent plate, the sealing frames are rectangular, and the transparent plates are fixedly connected to the inner side faces of the sealing frames. An upper cross beam and a lower cross beam of the sealing frame above and below the transparent plate are fixedly connected with transverse sealing strips respectively, the lower cross beam of the sealing frame is fixedly connected with a lower longitudinal beam of the frame, and the upper cross beam of the sealing frame is connected with an upper longitudinal beam of the frame through a stud and a pressing plate; and a sealing strip is arranged between the vertical be