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Square to Round Shaft
Band Brake Material
Tensioning Means
Let-off Stands
Fig. 4
For installations with a relatively high
degree of slope (12 degrees or more),
the method of handling is slightly
different. The roll of belt is set up as
previously described. It is often found
most convenient to place it at or near
the head pulley, since this generally
is the most accessible. Assuming the
conveyor is sufficiently long to require
more than one splice, the conveyor side
and the return sides are threaded on
separately. Care must be taken to see
that conveyor side or heavier cover is up
on the carrying side and down on the
return run.
As the belt is fed on, the tension at
the roll tends to build up due to the
weight of the belt on the slope. For
this reason, some method of braking is
required. Customary practice is to use
a belt clamp, mounted on the conveyor
structure, through which the belt is
threaded. Where the slope is very long,
additional clamps should be spaced
approximately 1000 feet apart. Where
more than one clamp is used, workers
are stationed at each clamp to loosen
and tighten the clamps as the belt is
fed onto the conveyor. Care must be
exercised that the belt does not run
away. As a roll runs out, another is spliced
on and then fed onto the conveyor.
If the conveyor side and the return side
have been fed on separately, the final
splice is best made at the bottom of the
slope where the ends of the belt meet,
since a much lower splicing tension will
serve at this point. Making the final splice
at the top of the slope is entirely possible
but requires proper splicing tension.
When pulling the belt onto the system,
station personnel at key points along
the conveyor to help avoid the belt from
hanging up on the structure resulting in
belt damage. Pull the belt ends until they
overlap the required splicing length.
To prevent the belt roll from over-running at the let-off, a
braking device is often needed (Fig. 4).
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Installation, Maintenance & Troubleshooting Guide
Installation