Sealing structure for material conveying device

The utility model discloses a sealing structure for a material conveying device, which comprises a spiral conveyor, a feeder, a connecting pipeline, a storage bin, a sealing pipe I, a sealing pipe II and a scraping plate, the feeder is mounted on the spiral conveyor, the storage bin is arranged on one side of the spiral conveyor, and the sealing pipe II is mounted on the connecting pipeline. The spiral conveyor comprises a spiral shaft, a spiral conveying pipe, a spiral conveyor motor and spiral blades, the output end of the spiral conveyor motor is fixedly connected with one end of the first coupler, and the spiral blades are installed on the spiral shaft; the inner end of the spiral shaft penetrates through the bearing assembly base shell cover, the bearing assembly base, the shaft seal, the bearing and the limiting pre-tightening nut to be connected with the first coupler in a matched mode, the inlet end of the spiral conveying pipe is communicated with the bottom of the feeder, and the tail end of the spi