Spiral feed conveyor

The invention belongs to the technical field of feed conveying, and particularly relates to a spiral feed conveyor. The spiral feed conveyor comprises a rack, a feeding mechanism, a conveying pipe, a driving mechanism, a main packing auger and an auxiliary packing auger, the conveying pipe is arranged on the rack, the feeding mechanism feeds feed into the conveying pipe, the main packing auger is coaxially arranged in the conveying pipe, the driving mechanism drives the main packing auger to rotate, and the auxiliary packing auger is arranged around the axis of the main packing auger. The auxiliary packing auger is parallel to the main packing auger and penetrates through a main blade of the main packing auger, so that an assembly through hole is formed in the main blade, and the driving mechanism drives the auxiliary packing auger to synchronously revolve along with the assembly through hole and drives the auxiliary packing auger to rotate so as to push the feed to move backwards. According to the spiral fee