Self-bearing residue-free conveying device

The utility model discloses a self-bearing residue-free conveying device which is characterized in that two ends of a driving shaft are respectively provided with a driving chain wheel, two ends of a driven shaft are respectively provided with a driven chain wheel, chains are wrapped between the driving chain wheels and the driven chain wheels, and a pore plate capable of automatically bearing the weight of materials is connected between corresponding chain links of the two chains. The driving shaft is a hollow shaft, one end of the driving shaft is connected with a compressed air pipeline through a rotating joint, at least one row of driving shaft spraying holes are formed in the length direction of the driving shaft, and each driving shaft spraying hole is provided with a driving shaft nozzle extending outwards in the radial direction; the driven shaft is a hollow shaft, one end of the driven shaft is connected with a negative pressure suction pipeline through a rotary connector, at least one row of driven