PULL SWITCH TESTING

pULL SWITCH TESTING 

Problem

One of the prime concerns on any mining or quarrying site is safety, especially around moving parts. Conveyor belts are good for moving large volumes of material, be it iron ore, cereals or road base, but they also need some method of stopping them quickly in case of emergency. 

Running alongside conveyors are cables which, when pulled, cause a switch, usually some distance away, to trip and stop the conveyor. While the switches have to be sensitive to the operation of the cable, they must also be able to withstand the vibration inherent in the conveyor system due to various factors, such as the motion of the conveyor idlers.

VSS was asked to help in the design of a vibration system to allow the switches to be tested under various vibration parameters, such as frequency and force of vibration. They designed a vibrating table with a single vibrating motor and a variable frequency drive to replicate the conditions on mine site conveyors.

Solution

The use of a single motor, from VSS ‘s principals, NetterVibration, meant that there was a slight sideways movement to the table top, as well as the usual vertical action, so as to more accurately simulate actual conditions. The VFD was supplied by the client, who is allied to a company making these units, and this can adjust the motor drive to give varying frequencies and forces of vibration. 

The client then visited mine sites with a vibration measuring system, also from NetterVibration, to determine the vibration in their conveyors. The VibroScanner gives accurate frequency, amplitude and acceleration measurements, and these data were replicated on the client’s test table to ensure that the switches being supplied could withstand these vibrations, and did not give false tripping.

For more information, contact “sales@vibrationsystems.com.au”

Rail Wagon Unloading Vibrator
Vibrating Rail Wagon Unloader
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For more information about our vibration supplies, call our friendly team today on  1800 300 877.
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