Smoke exhaust cooling device for diesel engine

The utility model discloses a smoke exhaust cooling device for a diesel engine. The smoke exhaust cooling device comprises a plate body. A through hole is formed in the center of the plate body. A barrel communicated with the through hole is fixedly welded on the left end face of the plate body, and the front end of the barrel is sealed. Two air tubes are communicated with and arranged on the outer wall of the barrel at an interval. A sealing housing is fixedly welded on the outer wall of the barrel and the left end face of the plate body. A sealed cavity is formed between the sealing housing and the outer wall of the barrel. A cooling water inlet pipe and a cooling water outlet pipe are arranged on the two opposite sides of the sealing housing respectively. The smoke exhaust cooling device is rational in structural design; and the sealing housing is arranged outside the barrel, and is matched with the cooling water inlet pipe to circulate cooling water in the sealing housing for cooling, so that the temperat