Container gantry cranes are used to load and unload container ships. They are generally classified according to the number of containers they can handle at once, with the most common being semi-portal, portal, and rail-mounted. Container gantry cranes typically have a lifting capacity of 40-60 tons and can span up to 20 containers wide. They are equipped with various parts to make loading and unloading container ships safe and efficient. Here are some of the most crucial parts of a container gantry crane:
1. Main girder
The main girder is an important load-bearing component made of steel and consists of two parts: the upper and lower chords. The upper chord is connected to the crane(grua portico contenedores)’s trolley, while the lower chord is connected to the crane’s jib. The main girder also has a web, which provides additional support and helps to distribute the load evenly. As the crane moves, the main girder bears the weight of the trolley, the jib, and any containers that are being carried.
2. Cantilever
The cantilever provides the crane with lateral stability, thus preventing it from tipping over when lifting heavy loads. It also helps to distribute the weight of the load evenly, ensuring that the crane can operate smoothly and safely. The cantilever allows the crane(grúas pórtico) to reach over obstacles, such as other containers, when loading and unloading cargo. It also supports the trolley and winch assembly, ensuring that these critical components are properly supported during operation.
3. Supporting legs
Container gantry cranes have a number of supporting legs, which serve several important functions. The legs help to support the weight of the crane and also provide stability when the crane is moving containers. Additionally, the legs distribute the weight of the crane evenly, so that it does not tip over. Without the support of the legs, a container gantry crane would not be able to safely operate. Look at this blog link for more info: https://aicrane.cl/grua-rmg/
4. Lifting wire rope
Lifting wire ropes load and unload container ships at the port. They help to move containers from the ship to the crane, and then from the crane to the ground. There are three main functions of the lifting wire rope in a container gantry crane:
● Lifting containers: The lifting wire rope is attached to the container and lifts it off the ship and into the air.
● Supporting the container: Once the container is lifted off the ship, the lifting wire rope helps to support its weight.
● Lowering the container: When it is time to unload the container, the lifting wire rope lowers it down to the ground.
5. Trolley
The trolley consists of a steel beam that runs the length of the crane jib, with paired wheels at either end that ride along tracks on the crane tower. A motor-driven chain or cable system is used to move the trolley back and forth along the jib, while a separate cable system is used to raise and lower the beam. This allows the operator to precisely position the crane hooks over the container, regardless of its location on the wharf.
A container gantry crane of Aicrane Machinery is a large and powerful machine that can move shipping containers around the port. They are an essential part of the port infrastructure and play a critical role in getting cargo to its destination.