Handwheel gate operator, also known as manual screw gate operator, is a device designed for manual operation of flat闸门. It features an automatic locking function, allowing the gate to remain at any position. It is equipped with a theft-proof mouth and wrench, offering anti-theft water protection. The screw gate operator is characterized by quick direction and speed variation, manual cranking start, light operation, and flexible opening and closing. Its structure consists of the housing, cover, bracket, nut, screw, large and small bevel gears, pressure bearings, and hand crank handle.