The double-lifting-point winch hoist is a type of hydraulic engineering machinery that synchronizes the operation of two single-lifting-point hoists through a connecting shaft. It is used to operate wider gates and features balanced force distribution, high lifting capacity, and stable operation. It is widely applied in water reservoirs, hydropower stations, sewage treatment plants, and other hydraulic facilities.
Definition and Working Principle
The double-lifting-point winch hoist consists of two single-lifting-point hoists combined via a connecting rod or shaft to achieve synchronous drive (unilateral or bilateral drive), balancing the force on wide gates. Its working principle involves an electric motor driving the drum to wind or unwind the steel wire rope through a coupling, reducer, and gear system, thereby raising or lowering the gate. The master controller regulates the position, while the brake ensures it remains stationary.
Main Applications and Features
Application Scenarios: Used in hydraulic engineering such as hydropower stations, reservoirs, and river regulation to operate plane gates for flow regulation, flood discharge, debris removal, or equipment maintenance.
Core Advantages:
Balanced force distribution and high starting force, suitable for wide gates.
High synchronization and smooth operation, reducing the risk of jamming.
Simple structure, easy maintenance, and compatibility with electric or manual operation.
Common Types
QPQ Type: Standard fixed type, used for conventional gate operation.
QPK Type: Rapid operation type, equipped with a centrifugal governor for emergency gate closure within 2 minutes.
QPG Type: High-lift type, suitable for deep orifice gates.
QPT Type: Mobile gantry type, capable of operating multi-orifice gates.