Self Cleaning Blocked Chute Switches

Self cleaning blocked chute switches for protection of crushers, transfer chutes and wet screens etc.

Application problem:

The mining customer had numerous false trips causing production downtime with their blocked chute switches. The blocked chute switches were used to protect, primary crushers, secondary crushers and tertiary crushers as well as conveyor transfer chutes and wet screens. The problem was due to water sprays, clay and wet fines build-up, over the switches. The customer had tried tilt switches, microwave switches and admittance probes, to no affect.

Solution:

In order to work reliably in a wet environment that also suffers from build-up of fines and clay, we must choose a technology that is not affected by a high dielectric environment and most importantly, “will self clean". We used our Gladiator “low frequency” Acoustic Switch range that atomize the moisture and build-up off the face of the diaphragms with each pulse of the transducer’s (2 per second). The diaphragms of the transducers can be supplied with UHMW Polyethylene (wear plate material) as well as Titanium, for greater wear resistance. The transducers are flange mounted and can be separated by up to 500 meters (1640 ft) from the remote Gladiator Amplifier. A remote test function is available, as well as a range of communication options, ProfiBus PA, DP, FieldBus, HART,etc. and a 24 month money back guarantee from date of commissioning if not satisfied.

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