Device for Detecting Foreign Entrainment in Grain Combined Harvest Operation

The invention discloses a device for detecting foreign entrainment in grain combined harvest operation, which comprises a picking-off roller, a settling chamber, a separation box inlet and a rethreshing device, wherein the picking-off roller is connected with a pipeline at the rear side of a grain press, and a finger pushing booster is arranged in the pipeline, and a metal detector is arranged on the finger pushing booster; a shell is arranged outside the finger pushing booster; electromagnets are evenly distributed on the inner wall of the shell; a cylinder with a perforated screen surface is arranged in the settling chamber; a metal impurity detector is arranged at the top end of the settling chamber; a belt conveyor is arranged in the entrance of the separation box; the settling chamber is connected with the belt conveyor; the rethreshing device is connected with a grain bearing plate through a ball bearing; the grain bearing plate is provided with grain discharging blades, and the lower side of the front end of the grain bearing plate is provided with a grain discharging port. Compared with the prior art, the invention has the advantages that foreign matters entering the harvester can be detected, and foreign matters are prevented from entering the core working parts, so the core working parts of the harvester are conveniently and safely protected. Sg 38 36" Is 3 -9i) 32 - 20 4 10 1 1 31 29 2 37 16 40 22 AIs1 26 23 46 46 44 43 42. 41 Fig. I