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Overhead Crane

An overhead crane, also known as a bridge crane, is a type of crane used primarily in industrial environments. It consists of parallel runways with a traveling bridge spanning the gap. The hoist, the lifting component of a crane, travels along the bridge. Overhead cranes are typically used for manufacturing or maintenance applications where efficiency and reliability are critical. These cranes are essential for lifting and transporting heavy loads safely and precisely over large distances within a facility.

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Overhead Crane

Level:Training and Assessment

  1. Bridge: The main structural element that spans the width of the workspace. It can be a single or double girder configuration.
  2. Runways: Parallel tracks that support the bridge and allow it to move horizontally along the length of the workspace.
  3. Hoist: The lifting mechanism that moves vertically to raise and lower the load. It travels along the bridge.
  4. Trolley: The unit that carries the hoist along the bridge.
  5. Control System: Includes manual controls, remote controls, or automated systems for precise operation of the crane.
  6. End Trucks: Located at both ends of the bridge, these support the bridge and house the wheels that run on the runways.

Types of Overhead Cranes:

  1. Single Girder: Features a single bridge girder supported by end trucks. The hoist trolley runs on the lower flange of the bridge girder.
  2. Double Girder: Features two bridge girders with the hoist trolley running on rails attached to the top of the girders. Offers greater lifting heights and capacities.
  3. Top Running: The bridge travels on rails mounted on top of the runway beams.
  4. Under Running: The bridge travels on the bottom flange of the runway beams.

Applications:

  • Manufacturing: Moving raw materials, work-in-progress, and finished goods.
  • Maintenance: Handling heavy components for equipment repairs.
  • Warehousing: Loading and unloading heavy materials.
  • Construction: Assembling large structural components.

Safety Features:

  • Limit switches to prevent over-travel.
  • Overload protection to avoid lifting beyond rated capacity.
  • Emergency stop functions.
  • Anti-collision devices to prevent accidents between multiple cranes.

Advantages:

  • Efficiently handles heavy loads.
  • Reduces manual labor and risk of injury.
  • Improves workflow and productivity.
  • Customizable for specific applications and environments.

Maintenance: Regular inspection and maintenance are crucial to ensure safe and reliable operation. This includes checking the condition of the hoist, trolley, bridge, runways, and control systems, as well as lubricating moving parts and replacing worn components.

Overhead cranes are versatile, reliable, and essential tools in various industrial sectors, offering significant advantages in handling heavy materials efficiently and safely