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Part Derrick Single-lever operation and dual lever
Part Derrick Single-lever operation and dual lever
2014-10-12 by seoerccy
By the boom, lifting column (or lifting mast), rigging and winches (or winch) and other components (see Figure derrick map). Derrick is a traditional boat landing equipment, although many ropes, operational problems, but the structure is simple, easy to manufacture, low cost, is still widely used.

Boom device with loading and unloading cargo, a single lever operation and dual lever in two ways. Single-pole loading and unloading operations are carried out with a boom, boom lift cargo after pulling lanyard boom swing together with the goods Full complement cylindrical roller bearing overboard or cargo hatch, and then down the goods, then boom back to the original bit, so from operations. Every time when loading and unloading boom swing with lanyard, so inefficient, labor-intensive. Dual lever with two booms, one placed over the cargo hatch, and another extending outboard, two boom with a lanyard attached to a working position. Two Crane boom with cable is attached to a hook. As long as were close, put two cargo runners, you can unload the cargo from the ship to the dock, or the goods from the loading dock to the boat. Dual lever handling efficiency is higher than single lever operation, labor intensity is also lighter.




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