A revolutionary step forward in the
mining industry was the invention of the conveyor belt arrestor device.
This device, after installation,
monitors the belt movement via a monitoring pulley.
When the conveyor belt runs in the
opposite direction for more than a pre-set distance, air supply is sent to the
pneumatic cylinders, that in turn activates the arresting system.
Once activated, the device lowers the
arrestor arm in approximately two seconds, and at the same time, the belt drive
is automatically deactivated.
The resting arm is lowered onto the
running belt, and through pressure applied onto the belt, causes the out of
control belt to come to a halt.
During tests, the belt after activation,
was halted in less than 5 seconds, with minimal waste and no damage to
machinery, equipment or life. The maintenance team in the event of a belt
failure, after halting by the Arrestor, will be able to have the damage reversed
and the belt operational in a much shorter time period, compared to present
An important aspect of this device, is
that when the belt load increases, the arresting load increases accordingly,
making the arresting device suitable for all occasions. The arresting arm is
designed in such a way, that it will not damage the belt, equipment or machinery