Screw-type handwheel hoists (also known as handwheel-operated screw hoists) are mechanical devices used to manually control the opening and closing of gates. They are primarily applied in small-scale hydraulic engineering, farmland irrigation, river regulation, and scenarios without electricity supply. ?Core Structure
Composed of a support frame, handwheel, gear set, pressure bearing, screw rod, and housing, the device uses manual force to drive the gear transmission, enabling the screw rod to lift or lower and thereby control the gate’s movement. Its features include lightweight and flexible operation, stable directional and speed control, and the ability to self-lock at any position. ?
Applicable Scenarios
Suitable for hydraulic and hydroelectric projects such as reservoirs, irrigation districts, and river embankments. Supports dual-operation models (e.g., QD type) and adapts to various terrains including mountainous and plain areas. ?
Installation Key Points
During installation, ensure the base levelness is ≥90% and the vertical deviation of the screw axis is ≤3mm;
Equip with anti-theft locking devices and a dual limit protection system;
Debugging requires no-load testing and setting of upper and lower travel switches, with an error margin not exceeding 1 cm.