The utility model relates to a
chain type wrench, also known as a chain clamp, which comprises a handle and a
chain which is hinged with one end of the handle.One end of the chain is hinged
with one end of the connecting plate, and the other end of the connecting plate
is hinged with the handle. The teeth at the front end of the pliers handle arc
distributed. The chain type pipe at work, non articulated chain end is free, and
the clamp handle is fixed or hinged, pipe clamping, rotating by friction between
the pipe and winding its chain to achieve, and the torque by the meshing force
of local cone and the front end of the clamp handle chain produced no, the clamp
handle force on the pipe surface sites. Therefore, the chain pipe wrench can not
only the metal pipe, and pipe fittings, pipe fittings, ceramic thin-wall plastic
pipe fittings for clamping, rotating, does not have a bite, no damage to the
surface of the pipe.