Rail mounted gantry cranes (RMG) are widely used in container terminals and intermodal yards for efficient handling and transportation of shipping containers. These versatile cranes are equipped with a unique working mechanism that allows them to move along rail tracks while performing lifting and positioning operations. In this article, we will explore the main working mechanism of a rail mounted gantry crane, shedding light on its key components and operation.
Working Mechanism of Rail Mounted Gantry Crane
Rail Traveling System
The rail traveling system is the foundation of the rail mounted gantry crane's working mechanism. It consists of steel rail tracks embedded into the ground, along which the crane travels. The crane is equipped with rubber tires or specialized wheels that run along the tracks, providing stability and precise movement.
The rail traveling system enables the crane to traverse the length of the rail tracks, allowing it to reach different container stacking areas or workstations within the terminal. The movement is typically controlled by a combination of motorized wheels and drive systems, ensuring smooth travel and accurate positioning.
Lifting and Spreader Mechanism
The lifting and spreader mechanism of a rail mounted container gantry crane is responsible for lifting and positioning containers. The crane is equipped with a hoisting system comprising wire ropes or chains, along with a winch or hoist drum. These components work together to lift and lower the spreader or container lifting attachment.
The spreader mechanism is designed to securely grip the corners of a shipping container, allowing for safe and efficient lifting and movement. The spreader can be manually or mechanically operated, with hydraulic or motorized systems to control the opening and closing of the gripping arms. This mechanism ensures precise positioning and stability during the lifting and lowering of containers.
Trolley Traveling System
The trolley traveling system allows the rail mounted gantry crane to move horizontally along the span of the gantry beam. The gantry beam is positioned above the rail tracks and is supported by upright legs. The trolley, which carries the lifting mechanism, can move along the gantry beam, providing flexibility and extended reach.
The trolley traveling system typically consists of motorized wheels or drive systems that enable smooth and controlled movement. This mechanism allows the crane to position the lifting mechanism precisely over the desired container, facilitating efficient loading and unloading operations.
Control and Automation System
The control and automation system is an integral part of the rail mounted gantry crane's working mechanism. It includes a control panel or cabin where the crane operator can monitor and control the crane's movements and operations. The control system is often equipped with advanced features such as variable speed control, anti-sway systems, and collision avoidance systems.
Automation technology is increasingly incorporated into rail mounted gantry cranes, allowing for semi-automatic or fully automatic operations. Automated systems utilize sensors, cameras, and computer algorithms to optimize container crane movements, improve productivity, and enhance safety.
Conclusion
The working mechanism of a rail mounted gantry crane combines various components and systems to enable efficient container handling and transportation. The rail traveling system provides the crane with the ability to traverse the rail tracks, reaching different areas within the terminal. The lifting and spreader mechanism allows for the safe and precise lifting and positioning of containers. The trolley traveling system facilitates horizontal movement along the gantry beam, expanding the crane's reach. Finally, the control and automation system ensures smooth operation, control, and safety.
Understanding the main working mechanism of a rail mounted gantry crane helps stakeholders appreciate the complexity and efficiency of these machines. With their robust design and sophisticated mechanisms, rail mounted gantry cranes contribute significantly to the smooth operation of container terminals and intermodal yards, supporting the global logistics and transportation industry.
April 28, 2020 — Global Rail Mounted Gantry (RMG) Crane Market is anticipated to reach USD 399.7 million by 2025.
Data transmission and key power supply are achieved by dynamic motor driven cable reels.
RMG cranes are characteristically higher and wider then RTG cranes.
The factors that propel the growth of the Rail Mounted Gantry Crane industry include addition of smart features in RMG cranes has facilitated in realizing lesser operative hazards and advanced effectiveness.
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