10/28/2021
Delta’s Overhead Double Hoist Crane Solution Emphasizes Control and Safety for Various Lifting Applications
The stay-at-home economy is here to stay, and it is boosting e-commerce and global cargo demand. Due to the growth in shipping, many ocean carriers are starting to build larger container ships to expand their TEU capacity. While ship size and loading are increasing, harbor management companies are considering upgrading docking facilities and purchasing more lifting equipment to improve their port capacities. With increasing loading and unloading efficiency, ships require shorter stays in port. This is optimizing operations for the rapid growth of arrival and departure cargo.
An overhead crane is known as a bridge crane. It is one of the most widely used pieces of lifting equipment, which are common in industrial environments. With greater shipping prosperity, it is grabbing the attention of harbor management companies. The overhead crane consists of parallel runways with a traveling bridge spanning the gap, and the component that travels along the bridge is called a hoist. The crane lifts, moves, and positions heavy loads in both horizontal and vertical directions.
Aiming for the potential of overhead cranes, Delta has recently introduced its overhead double hoist crane solution. The solution employs an entire Delta control system set. With a single hoist, it can lift up to 20 tons while both hoists in cooperation can handle 1.25-times the rated load, which is 50 tons. The lifting process is stable without hook gliding and is suitable for various application scenarios.
Delta’s Overhead Double Hoist Crane Solution employs the Compact Modular Mid-range PLC AS300 Series to control hoists, the traveling bridge, and the Heavy Duty Vector Control Drive CH2000 Series through Ethernet/IP communication, which simplifies wiring. In addition, with Delta's Unmanaged Switches DVS-008 Series, users can build an industrial Ethernet system and transit data to achieve remote monitoring and control.
Delta’s Overhead Double Hoist Crane Solution brings the following benefits:
- Flexible Setting for Lifting Modes
Delta’s Overhead Double Hoist Crane Solution employs the Heavy Duty Vector Control Drive CH2000 Series. With the D2D (Drive-to-drive) function, the hoists can work separately or collaboratively. Users can set the needed mode depending on the application scenario.
- Stable Control without Hook Gliding
Delta’s Overhead Double Hoist Crane Solution adopts FOC+PG closed-loop control system. With a large starting torque output up to 200% at very low, the stability remains elevated at high speed. Moreover, the solution has a torque detection function, which ensures the inverter of the hoist has sufficient brake torque before braking to avoid hook gliding.
- Failure Handling Function for Equipment Safety
The solution features a brake failure handling mechanism to avoid potential hazards caused by mechanical brake failures. When the inverter loses feedback signals from the brake, it switches to zero-speed holding mode. The design enhances the overall safety of the lifting equipment.
Delta’s Overhead Double Hoist Crane Solution prioritizes precision and safety. It is suitable for applications in harbors, railways, and steel industries. The solution reduces labor intensity and increases production efficiency, which results in the use of automation for lifting and transportation.