Pneumatic discharge with no moving parts
Page 50
If you've noticed an error in this article please click here to report it so we can fix it.
• A new aeration system for Bulker pneumatic-discharge tipping tankers, known as a probe-type, has been developed by Metalair Ltd., Fishponds Road, Wokingham, Berks. The system enables all moving parts to be eliminated and its use gives a saving in weight of 241b compared with an aeration pad-type. It is also cheaper, simplifies servicing and prevents blow-back.
The system has been fitted to a Bullcer 640 cu.ft. tanker of marine quality light alloy which is elevated by an Edbro 6CAN twin-ram front-of-body tipping gear, air being supplied by a Holmes 68RBS compressor. Based on a Foden eight-wheeled
chassis, the tanker has a tare weightof 10 tons and can carry a payload of 16 tons. The tipper brackets are in light alloy.
Air is blown into the tank through a perforated probe pipe attached to a mounting plate at the rear of the coned rear end of the tank. The pipe is mounted horizontally in the tank and the discharge of air through the perforations fluidizes the material.
A discharge venturi at the outlet is fed with air from the same compressor, the material being discharged from the rear of the venturi to the silo. The probe is attached by four bolts to the back plate and can easily be removed if a fault develops.