PBT extra-heavy type ground plate chain conveyer

The utility model discloses a PBT extra-heavy type ground plate chain conveyer. A driving device drives a driving wheel assembly, the driving wheel assembly pulls two rows of traction conveying chains to run on an upper track and a lower track on a middle framework, the two rows of traction conveying chains support conveying table plates to convey extra-heavy type objects, the conveying distance is 300 m, and the two rows of traction conveying chains run continuously in a circulation mode through tail pulley rotation tensioning devices. A traction conveying chain guide rail installed on the lower track is guided on the traction conveying chains to prevent the traction conveying chains from being separated from the track. The tail pulley rotation tensioning devices are rotation components of the traction conveying chains, adjust the tightness of the traction conveying chains and absorb the effect of the extension of the traction conveying chains due to long-term running. The driving device is in a ZLQ type dir