Adaptive urea mixer

An adaptive urea mixer, comprising a housing, a first movable plate, a second movable plate, a first fixed ring, a first flow guide plate, a second flow guide plate, and a urea nozzle;

• wherein the housing is a hollow cylinder, the housing is formed with an air inlet and an air outlet at two opposite ends, respectively, the first movable plate, the second movable plate, and the first fixed ring are sequentially provided in a direction from an air inlet to an air outlet in the housing;
• the first fixed ring is circumferentially fixedly connected to an inner side wall of the housing, a plurality of guide columns provided in parallel are circumferentially fixedly provided on the first fixed ring, each of the guide columns extends toward the air inlet, a first position-limiting portion and a second position-limiting portion are provided on each of the guide columns, and the second position-limiting portion is located between the first fixed ring and the first position-limiting portion;
• the first movable plate is slidingly sleeved on the guide column between the first position-limiting portion and the second position-limiting portion, the second movable plate is slidingly sleeved on the guide column between the second position-limiting portion and the first fixed ring, a first elastic support element is sleeved on the guide column between the second position-limiting portion and the first movable plate, and a second elastic support element is sleeved on the guide column between the first fixed ring and the second movable plate;
• one end of the first flow guide plate and one end of the second flow, guide plate are both fixedly connected to the first fixed ring, both the first flow guide plate and the second flow guide plate extend toward the air inlet and pass through the second movable plate and the first movable plate in turn, the first movable plate and the second movable plate are provided with a first notch and a second notch, respectively, the first notch and the second notch are located on both sides of the first flow guide plate, respectively, the first movable plate, the second movable plate, the first flow guide plate, and the second flow guide plate define a mixing space;
• the urea nozzle is provided on a side wall of the housing corresponding to the mixing space.