The double hook hook block is one of the common hook block forms.
The hook blocks have two types: short hook type hook block and long hook type hook block.
1 Short hook type hook block
The hook beam of short hook type hook block is located below the pulley shaft, the hook straight-bar part is short, the pulley block has small axial dimension and bridge crane hook block structure, the steel rope deflection angle is small, the parity of the number of steel rope in the 10 tons double beam semi-closed hook block is not limited, and the application range is wide, and the disadvantage is that the overall height is high.
2 Long hook type hook block
The long hook type hook block has a long straight-bar part, the pulley shaft and the hook beam are integrated, and the overall height is low, but the axial size of the pulley block is large, and the number of steel rope should be even.