Energy absorption arrestor system
1st Quarter 2013
Other technologies
The Horne Group’s improved Technogrid energy absorption system is widely used for arresting failed conveyor belt counterweights, runaway gantry cranes, mine cages in over-wind or under-wind conditions and runaway underground trains. The improved product builds on the original South African design and is smaller and lighter, with a higher energy absorption per unit mass. Recent sales have included 350 units to platinum mines in South Africa, 75 units to Mongolia’s platinum and gold mines, and 38 units to Mexico.
Technogrid functions by absorbing a moving body’s kinetic or potential energy through deformation of a metal grid. It comprises a series of multi-bar units connected in a staggered grid shape which upon impact allow the metal bars to yield and deform under double curvature bending, opening up the units and absorbing the impact energy through strain hardening. The product is easy to install, is maintenance free and can absorb any impact as long as the catch framework is designed to put the grid into tension.
In the case of a conveyor counter-weight, for example, the Technogrids are positioned vertically next to or below the counter-weight, with a catch frame attached to their lower ends and positioned just below the lowest point of normal vertical movement. Should the conveyor belt fail and the counterweight fall into the catch frame, the Technogrids will stop its fall, absorbing all impact energy. Individual Technogrid units can be designed to absorb energy up to 40 000 kJ and impact speeds of up to 120 km/h.
For more information contact André du Preez, Horne Group, +27 (0)11 974 1004, [email protected], www.horne-group.com
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