A pneumatic conveying variable spray head comprises a housing, a
nozzle is arranged in the front end of the housing, the rear end of the
nozzle is fixedly connected with a sliding plug, a
pipe base is arranged in the sliding
plug in a sleeved mode and connected with one end of a water inlet
pipe, and the
nozzle, an inner cavity of the sliding plug, an inner cavity of the
pipe base and the water inlet pipe form a cavity used for
liquid circulation. The
spray nozzle is provided with multiple
layers of spray outlets capable of moving relatively, can be adjusted in a segmented manner, can adjust and control the positions of the
fog drop outlets according to the change of
wind power by driving a sliding plug through blades, has the function of adjusting the spray angle along with the
wind speed, realizes the change of the annular spray flow section along with the
wind speed, effectively guarantees the dispersion degree of
fog drops, and can be used for spraying the
fog drops even if the
wind speed is increased. And by increasing the
diameter of the spraying section, the fog drop concentration in the
wind field is relatively uniform, the spraying section is controllable, and the requirement of accurate variable spraying is met.