Two parallel girders positioned on top of a runway construction make up a double rail trolley type crab, sometimes referred to as a double girder overhead crane. The trolley system used to move the crane along the runway operates on two parallel rails, hence the name "double rail trolley."
For lifting and moving heavy items, the two rail trolley type crab is frequently used in industrial settings including factories, warehouses and construction sites. In comparison to other crane types, it has a number of benefits, such as a higher lifting capability, more stability, and the capacity to cover a broader working area.
1. Double girder: Two strong girders that run parallel to one another support the crane. In comparison to single girder cranes, these girders offer more strength and stability, enabling higher lifting capacities.
2. Trolley system: The device that slides along the double rails on top of the girders while transporting the hoist is known as a trolley. It permits the load's horizontal movement, allowing for exact positioning.
3. Hoist: The hoisting device attached to the trolley is known as a hoist. A motorised drum or chain is used to raise and lower the weight. Depending on the precise lifting needs, the hoist's capacity, speed, and control options can be altered.
4. Controls: The operator of double rail trolley type cranes can control the crane's movement and hoisting operations using a control pendant or a wireless remote control. Advanced elements like computerised control systems and automatic positioning may also be found in some cranes.
The twin rail trolley type crab offers exceptional flexibility because it can effectively manage huge loads and a large operating area. In industries including manufacturing, heavy equipment maintenance, and construction projects, it is frequently employed in situations where a large lifting capability and precise load placing are necessary.