Material Handling Semi Gantry Crane for Limited Spaces
Components
♦Girder
The girder is the main horizontal beam of the semi gantry crane. It can be designed as a single-girder or double-girder structure depending on the lifting requirements. Made of high-strength steel, the girder resists bending and torsional forces, ensuring stability and safe operation during heavy-duty lifting.
♦Hoist
The hoist is the key lifting mechanism, used to raise and lower loads with precision. Usually electrically powered, it is mounted on the girder and moves horizontally to position loads accurately. A typical hoist includes a motor, drum, wire rope or chain, and hook, offering efficient and reliable performance.
♦Leg
A unique feature of the semi gantry crane is its single ground-supported leg. One side of the crane runs on a rail at ground level, while the other side is supported by the building structure or an elevated runway. The leg is fitted with wheels or bogies to ensure smooth and stable movement along the track.
♦Control System
The control system allows operators to manage crane functions safely and easily. Options include pendant controls, radio remote systems, or cabin operation. It enables accurate control of lifting, lowering, and traversing, enhancing both efficiency and operator safety.
Safety Devices of Semi Gantry Crane
To guarantee smooth operation and maximum safety, the semi-gantry crane is equipped with multiple protection systems. Each device plays a crucial role in preventing accidents, reducing downtime, and ensuring reliable performance.
♦Overload Limit Switch: Prevents the semi gantry crane from lifting loads beyond its rated capacity, protecting both the equipment and operators from accidents caused by excessive weight.
♦Rubber Buffers: Installed at the end of the crane’s travel path to absorb impact and reduce shock, preventing structural damage and extending equipment lifespan.
♦Electric Protective Devices: Provide automatic monitoring of electrical systems, cutting off power in case of short circuits, abnormal current, or faulty wiring.
♦Emergency Stop System: Allows operators to halt crane operations instantly in dangerous situations, minimizing the risk of accidents.
♦Voltage Lower Protection Function: Prevents unsafe operation when power supply voltage drops, avoiding mechanical failure and protecting electrical components.
♦Current Overload Protection System: Monitors electrical current and stops operation if overload occurs, safeguarding the motor and control systems.
♦Rail Anchoring: Secures the crane to the rails, preventing derailment during operation or strong winds in outdoor environments.
♦Lifting Height Limit Device: Stops the hoist automatically when the hook reaches the maximum safe height, preventing over-travel and potential damage.
Together, these devices form a comprehensive safety framework, ensuring efficient, reliable, and secure crane operation.
Key Features
♦Efficiency of Space: The semi-gantry crane is uniquely designed with one side supported by a ground leg and the other by an elevated runway. This partial support structure minimizes the need for large-scale runway systems while maximizing available workspace. Its compact form also makes it suitable for areas with limited headroom, ensuring smooth operations even in height-restricted environments.
♦Adaptability and Flexibility: Thanks to its versatile configuration, the semi-gantry crane can be installed both indoors and outdoors with minimal modifications. It can also be customized to meet specific operational requirements, including span, lifting height, and load capacity. Available in both single-girder and double-girder designs, it offers flexibility to suit a wide range of industries.
♦Elevated Load Capability: Built with robust materials and engineered for durability, the semi-gantry crane is capable of handling anything from light loads to heavy-duty lifting tasks of several hundred tons. Equipped with advanced hoisting mechanisms, it delivers stable, precise, and efficient lifting performance for demanding operations.
♦Operational and Economic Advantages: Semi-gantry cranes are designed for ease of use, offering intuitive controls and multiple operation options, such as remote or cab control. Integrated safety devices ensure reliable performance under challenging conditions. In addition, their partial support design reduces infrastructure requirements, installation costs, and long-term energy consumption, making them a cost-effective lifting solution.
