Exhaust device of box-type atmosphere furnace

The utility model discloses an exhaust device of a box-type atmosphere furnace, which comprises a box-type atmosphere furnace main body, a heating chamber is arranged on one side in the box-type atmosphere furnace main body, a rear driving system is arranged in the heating chamber, a front chamber is arranged on one side of the heating chamber of the box-type atmosphere furnace main body, and a middle door is arranged between the heating chamber and the front chamber. A front door is mounted on the other side of the front chamber, a quenching tank is arranged at the bottom of the front chamber, a lifter driving cylinder is mounted at the top of the box-type atmosphere furnace main body, a power output end of the lifter driving cylinder is connected with a lifter, the lifter is movably mounted in the front door, and a waste gas port is formed in one side of the top of the front chamber of the box-type atmosphere furnace main body; an exhaust mechanism is mounted in the waste gas port, a smoke exhaust hood is m