Question

8. Allow the shaft to mix the ingredients. The mixer will turn off when the vessel apart from the switch activator.

Answer 1

Mixing vessels in chemical processing plants are used to house the chemical compounds that have been mixed together to form the finished product. All vessels are air-tight to ensure that no outside contaminants can affect the chemical reaction that is taking place within the mixing vessels. There are a series of blades on the inside of the mixer that operate at incredibly fast speeds to blend the chemicals together. Therefore, such chemical processing machinery is extensively interlocked to ensure that cleaning and / or maintenance personnel can only gain entry to the vessels once power to the machine has been isolated and the chemicals being processed have been removed from the mixing vessels.  

 

Key Facts

Fortress Solution

The Fortress solution comprised the following:-

TA2T6UX401– Explosion Proof Safety Switch

Sequence of Operation

In order to gain entry to the mixing vessels, an operator must isolate the power using a nearby control panel. The operator must then unscrew all the air tight fixings holding the vessels hatch door closed. Once all of these fixings are removed, the operator can gain entry by using the handle to open the mixing vessels hatch door. Upon opening the hatch door, this disengages the tongue from the locking mechanism on the ‘TA2T6UX401’ explosion proof safety switch to ensure that power to the machine cannot be restarted.   

Answer 2

A dregs/juice separation apparatus includes a base having a power element driving a shaft to rotate. A pin protrudes from a surface of the shaft. A container includes an opening coupled with the base. A cutter unit includes a guiding member mounted around the shaft. The guiding member includes at least one guiding groove. The pin of the shaft extends into the at least one guiding groove. The cutter unit is rotatable relative to the shaft and is movable relative to the shaft in a longitudinal direction. The cutter unit further includes a cutter portion connected to the guiding member. A dreg collecting member includes an opening sealed by a cover.