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Introduction to Bridge Cranes
Bridge type Crane It is a type of bridge crane that operates on elevated tracks, also known as an overhead crane. The crane bridge travels longitudinally along the tracks laid on both sides of the elevated structure, while the hoisting trolley moves laterally along the tracks mounted on the bridge, thereby defining a rectangular working area. This configuration enables efficient lifting and handling of materials beneath the bridge, free from interference by ground-level equipment.
A crane bridge is characterized by its ability to lift heavy loads suspended from a hook or other lifting attachment vertically or to move them horizontally within a defined spatial area. Bridge cranes comprise a hoisting mechanism and trolley-and-girder travel mechanisms. Through the coordinated operation of these mechanisms, heavy loads can be lifted and transported within a specified three-dimensional space. Bridge-type cranes, loading–unloading bridges, metallurgical bridge cranes, and cable-suspended cranes all fall into this category.
Bridge cranes are widely used in indoor and outdoor warehouses, factories, docks, open-air storage yards, and other similar settings. Bridge cranes can be classified into three types: standard bridge cranes, simplified bridge cranes, and metallurgical special-purpose bridge cranes.
A typical bridge crane consists of a hoisting trolley, a bridge traveling mechanism, and a bridge metal structure. The trolley comprises three main components: the hoisting mechanism, the trolley traveling mechanism, and the trolley frame.
The hoisting mechanism comprises an electric motor, a brake, a reducer, a drum, and a pulley block. The motor-driven reducer rotates the drum, enabling the wire rope to be wound onto or unwound from the drum for lifting heavy loads. The trolley frame serves as the supporting and mounting structure for components such as the hoisting mechanism and the trolley travel mechanism, and is typically a welded structure.
Keywords:
Crane
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