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No weight to be placed on top
Keep bends together to
prevent breaking the carcass
Fig. 3
In some cases, such as in mines
where headroom does not permit
maneuvering a roll, the belt may
have to be pulled off the roll and
reefed (Fig. 3). Extreme care should
be exercised to see that the loops
have large bends to avoid kinking or
placing undue strain on the belt, and
no weight should ever be placed on
the belt when it is in this position.
Ideally, supports should be placed at
each end where the bends occur.
A third method of handling the roll,
where headroom for mounting on a
horizontal shaft is lacking, is mounting
on a turntable with a vertical spindle. The
belt must make a 90-degree twist as it
comes off the turntable. This method is
sometimes used underground, with the
turntable mounted on wheels or skids for
transporting the roll of belt as it lies on its
side, as well as for unrolling it at the final
location.
If the belt is for replacement, the new roll
can be set up as previously indicated.
The old belt is clamped off and cut, and
the new belt is spliced to the leading end
of the old belt by using approximately
one-half the usual number of plate-type
fasteners. The trailing end of the old
belt is hooked to a truck, tractor, mine
locomotive or other means of providing
traction. The conveyor drive motor is
used to pull on the new belt while the
towing device drags the old belt away
and at the same time provides sufficient
slack side tension for the conveyor
drive pulley. In all cases, care should be
exercised to ensure the carrying side of
the conveyor is placed upward if pulling
onto the top run, or downward if pulling
onto the return run.
For a new conveyor installation having
little or no slope, a rope or cable should
be attached to a clamp at the belt end. In
clamping to the end of the belt for pulling
it on the conveyor, it is not sufficient to
cut a hole through the belt or ears into
its corners for tying on a rope. A clamp
should be made to distribute the pull
applied to the end across its full width.
Since the clamp must pass through
places of low clearance, it usually is made
of two pieces of 1/4-inch to 1/2-inch plate
approximately equal to the belt width
and 4 inches long. One piece is placed
against each surface of the belt at the
end, and bolts are placed through both
plates at about 6-inch intervals and 2
inches back from the belt end. The rope
is then attached to this clamp with a
shackle or by welding an eye to one of
the plates. The belt roll has been handled
as previously described. The rope or
cable is then threaded over the conveyor
and attached to a towing device to pull
the belt onto the conveyor.
Reefing the Belt
3
Installation, Maintenance & Troubleshooting Guide
Installation