Smoke exhaust device for fire engineering

According to the smoke exhaust device for the fire engineering, the conical wheel is arranged at the rear part of the fan in the flue, and when the fan sucks smoke in the flue, the smoke is diffused under the action of the conical wheel when passing through the conical wheel, so that the amount of the smoke which directly impacts on the fan is reduced, the fault probability of the fan is reduced, and the service life of the fan is prolonged. Smoke can be discharged smoothly. 本实用新型为一种消防工程用排烟装置，它在烟道内的风机后部设置锥形轮，在风机对烟道内的烟气进行抽取时，烟气经过锥形轮时在锥形轮的作用下进行扩散，从而减少了直接撞击在风机上的烟气量，降低风机出现故障的概率，保证烟气的顺利排出。