Lifting self-locking device of sprayer spray lance

The utility model discloses a lifting self-locking device of a sprayer spray lance. The lifting self-locking device comprises an upright and a support frame both arranged on the sprayer; a fixed pulley is arranged on the support frame; a winding gear and a lifting gear are arranged on the upright; a lifting steel wire rope is wound around the winding gear; one end of the lifting steel wire rope is wound around the fixed pulley and connected with the spray lance of the sprayer; the winding gear is a large gear, while the lifting gear is a small gear; the winding gear is engaged with the lifting gear; the winding gear and the lifting gear both are arranged on the upright by use of the support; rotating shafts are fixedly arranged on both the winding gear and the lifting gear; the rotating shafts are rotatably connected with the support; the rotating shaft of the lifting gear is hinged to an L-shaped handle; the lifting self-locking device of the sprayer spray lance is simple in structure, not easy to damage and low in use cost.