the rope grab's structure

   The grab is include six components is up girder/ through girder/ poles/ guide rope device/ up and down pulleys and so on.
   Grab's poles for the variable cross-section box structure, well bending/ compression performance/ the pole on the next two ends with the shells and up girder corresponding axes connected.
   Palate for the shell structure of the valve through the axes with the through girder and connectiong shells, the main working by the curved plate, side by welding and so on, up girder, through the hinge axis linking with the pole, with the layout of the throgh girder corresponding pulley blocks.
   Through girder under both ends of the hinge axis through the center hole and fight-connected. In order to grab the limited under the self-sufficient stiffness, strength, grab pieces of the structure of 16Mn adopted low-alloy plate manufacturing.