|
The PRX sample cutter high speed travel through material carried on the conveyor enables efficient sampling of moist materials having tendency for adhering
surfaces. Discharge from the cutter is enhanced by momentum and brake action at completion of the sampling cycle. Advantages of the PRX mechanisms also includes simplified installation requirements and
relative lower quantity of sample volume per extraction by comparison to conveyor discharge trajectory sampling.
The pneumatic drive cylinder is connected to the cutter shaft through mounting brackets and pivots to lift the cutter back to sampling initiation position after
completing a sampling cycle. Adjustment of cutter radius length to the belt arc and cutter angle to traversing path in moving through material burden on the belt is made at a shaft holding block. The
cutter is provided with adjustable plastic plate of durable quality (polyurethane or equivalent) to safely minimize clearance between the cutter radial arc path and the belt surface while avoiding contact with the
belt. Cutter volume is approximately equal to the cumulative sample volume.
Cutter opening in recommended as equal to a multiple of three times nominal particle top size, and cutter volume double sample extraction quantity. A
scraper-brush device is provided to recover any remaining and residual fines left on the belt surface into the sample.
Timing and control functions are carried out with the use of a PA-500 timer control unit provided by HRCS. Alternatively, the PRX sampler can
operated from a centralized programmed logic control system.
|
