Introduction to Rail-mounted Container Gantry Crane

Rail-mounted container gantry crane is a container crane installed on two rails and is referred to as RMG in English. It is mainly used for loading, unloading, handling and stacking containers in container railway transshipment yards and large container storage and transportation yards.

Rail-mounted container gantry crane consists of main beam, rigid and flexible gantry legs, running trolley, lifting mechanism, trolley running mechanism, electrical system, operating cab, etc. According to the yard operation process, the cantilever is extended in the direction of single gantry leg or double gantry leg to become a single cantilever or double cantilever model, and the one without extension is a cantilever-free model. According to the site, container storage and transportation process and loading and unloading vehicles (container trucks or railway vehicles), different structural forms of cantilever-free, single cantilever and double cantilever are determined.

Rail-mounted container gantry cranes are divided into different types according to the structure of the main beam and gantry legs and the anti-sway device used.

(1) Double-cantilever rail-mounted container gantry crane Since the container needs to pass through the space inside the gantry legs on both sides, the width direction clearance inside the gantry legs is larger. Depending on the form of the gantry supporting the main beam, double-cantilever rail-mounted container gantry cranes generally adopt a gantry with the upper part of the gantry open in a "U" shape and the upper part of the gantry connected in a "Π" shape. The structure of the non-cantilever rail-mounted container gantry crane is relatively simple because the container does not need to pass through the space inside the gantry.

(2) Compared with the shore container crane, the trolley of the rail-mounted container gantry crane has a lower operating speed and is generally not equipped with a sway reduction device. If the user requires it to reduce the operating intensity and improve productivity, a sway reduction device is installed. For rope-type lifting mechanisms, sway reduction is generally achieved by applying damping to the rope; for rigid lifting mechanisms, sway reduction is achieved by rigid components.