All-plastic carrier roller of belt conveyor

An all-plastic carrier roller of a belt conveyor comprises outer end covers, multiple-sealing devices, pipe seats, check rings, bearings, isolating rings and shafts, wherein a shaft and bearing seats are subjected to interference press mounting to constitute the pipe seats; the shaft penetrates through the pipe seats, the isolating rings and the bearings are mounted into two ends of the shaft, and the bearings are fixed at two ends of the shaft through the check rings; the multiple-sealing devices penetrate through the shaft, are in interference connection with the pipe seats and are mounted into two ends of the shaft, the outer end covers penetrate through the shaft and are in matching fit with the outer ends of the pipe seats, and the isolating rings and the bearings are mounted in the pipe seats; each multiple-sealing device comprises a sealing shaft cover, a sealing end cover, an inner sealing ring and an outer sealing ring, the inner sealing ring is mounted in the sealing end cover and on the sealing shaft cover, and the outer sealing ring is mounted on the sealing end cover and on the right outer edge of the inner sealing ring. The all-plastic carrier roller of the belt conveyor adopts one-step injection molding, the processing period is shortened, the sealing structure is compact, the dustproof and waterproof effects are good, the radial deviation is smaller, the circular runout amount is small, the coaxiality is high, the rotating resistance is low, and the all-plastic carrier roller can be applied to the field of bulk material conveying equipment.