Large spray head

The utility model relates to a large spray head. The utility model relates to the technical field of large-diameter air pipe ventilation. The air outlet pipe comprises a connecting pipe section, an adjusting pipe section and an air outlet pipe section which are sequentially arranged. A rotating shaft is arranged on the side wall of the adjusting pipe section in a rotating mode, the axis of the rotating shaft is perpendicular to the axis of the adjusting pipe section, an overturning plate is fixedly arranged at the end, located in the adjusting pipe section, of the rotating shaft, and the otherend of the rotating shaft is located outside the adjusting pipe section. The end, located outside the adjusting pipe section, of the rotating shaft is rotated to drive the overturning plate to rotatealong with the rotating shaft, the size of the air passing gap of the adjusting pipe section is adjusted by controlling the gap between the overturning plate and the inner wall of the adjusting pipesection, and therefore the