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SPECIALIST EQUIPMENT


the belt for safe access and replaced by a single worker. T e systems are engineered so operators can work on the equipment safely, without breaking the plane of motion. External servicing reduces confi ned space entry and eliminates reach-in maintenance, while facilitating faster blade replacement. T e result is greater safety and effi ciency, with less downtime.


Another example is an innovative


new belt cleaner design that can reduce the need for bulky urethane blades altogether. Martin Engineering’s patented design delivers extended service life, low belt wear, reduced maintenance and improved safety, ultimately delivering lower cost of ownership. Unlike conventional belt cleaners


that are mounted at a 90° angle to the belt, Martin Engineering’s cleaner is installed diagonally across the discharge pulley, forming a three-dimensional curve beneath the discharge area that conforms to the pulley’s shape. T e design incorporates a matrix of tungsten carbide scrapers and is tensioned lightly against the belt to prevent damage to the belt or


splices. Despite extremely low contact pressure between belt and cleaner, it has been shown to remove as much as 95% of potential carryback material. T e novel approach has been so eff ective that in many operations, previously crucial secondary belt cleaners have become unnecessary, saving further on belt cleaning costs and maintenance time.


FEEL THE TENSION I


n a related move toward safer, more productive material handling, Martin Engineering has introduced an automated pneumatic tensioning system for belt cleaners. The new device delivers precise monitoring and tensioning throughout all stages of blade life, minimising the labour typically required to maintain optimum blade pressure and extending the service life of both the belt and the cleaner.


26 www.engineerlive.com


Equipped with sensors to confi rm that the belt is loaded and running, the system automatically backs the blade away during stoppages or when the conveyor is running empty, minimising unnecessary wear to both the belt and cleaner. The result is consistently correct blade tension, with reduced power demand on start-up, all managed without human intervention. ●


The issue of power Another trend in large operations is a need for enhanced automation and monitoring, including such tasks as load sensing, belt tracking, cleaner tensioning and lighting. In most cases, electrical power is supplied only to the conveyor locations where it’s needed, such as the drive motor, and is not typically available for general purpose use. In many operations, this lack of available power means that any monitoring of the conveyor must be done by technicians physically walking the length of the structure, which can be a diffi cult and time-consuming task when the systems are long and span diffi cult terrain. A more effi cient approach is to


employ sensors to transmit important data from remote points to a central location where it can be monitored in real time and recorded for later analysis. But intelligent monitoring systems for any conveyor system require power for extended operation. Due to the distances involved, cabled communication systems are not ideal, and therefore wireless communication systems are more advantageous.


The slide-out design is engineered so the blade cartridge can be accessed safely and replaced by a single worker


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