Tri Tool 230B Lifting Frame - Manual (Page 6)

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TRI TOOL INC.
92-1058 : Orig. 021204
GENERAL DESCRIPTION
This lifting device attaches to the crane in the welding station of the J-lay tower on
the Heerema vessel Balder. The lifting device enables either the pipe cut-off
clamshell tool or the end preparation tool (230B) to be easily lifted and positioned on
the pipe in the tower. The lifting motion is powered by a hand-held drive that has on/
off and up/down control. This device attaches to the crane in a way that keeps the
orientation of the vertical positioners always aligned with the crane and thus the axis
of pipe. The lifting device is attached to the crane by pinning to two of the padeyes
on the bottom of the crane. The pipe cut-off clamshell tool is attached to the lifting
device with two slings. These slings attach to two lifting rings on the clamshell tool
and to plates with four attachment holes on the vertical positioners. The end prepa-
ration tool attaches to the lifting device with two pillow blocks. The orientation of the
end preparation tool is adjustable to allow operation on the pipe end coming through
either the floor or the ceiling of the welding station. This lifting device is made up of
three major assemblies, the crane attachment assembly, the yoke assembly, and the
vertical positioner assembly.
Crane Attachment Assembly
The crane attachment assembly secures the lifting device to the crane and main-
tains the device in alignment with the crane. As the crane stays in alignment with the
pipe, the lifting device and end preparation tool will also be in alignment with the
pipe. Pins are used to secure the two end plates of the crane attachment assembly
to padeyes on the crane. Structural members connect the two end plates creating a
secure foundation for the lifting device. The top surface of the forward end plate is in
close proximity to the bottom surface of the crane. This keeps the assembly aligned
with the crane as the J-lay tower angle is changed.
Yoke Assembly
The yoke assembly provides the structural connection between the vertical
positioner and the crane attachment assembly. This assembly is sized to allow the
lifting device to accommodate either the pipe cut-off tool or the end preparation tool.
This assembly also contains the power transmission components that connect the
vertical position to the vertical positioner drive.