SYSTEM FOR AUTOMATIC FEED AND CIRCULATION OF SUSPENSIONS AND SOLUTIONS IN FLOW MEASURING CELL OF ANALYSERS Russian patent published in 2014 - IPC G01N1/10 G05B19/00 

FIELD: instrumentation.

SUBSTANCE: proposed system comprises intake-and-discharge sealed station equipped with two-way controlled orifice valve arranged at vessel bottom. It includes device for vacuum feed of samples to measuring device. Said device consists of interconnected intake commutator, flow measuring cell connected to vacuum-pressure control system of said intake-and-discharge vessel. Note here that measuring cell comprises bottom inlet-outlet of fluids and is located at top point of sample feed line to rule out the ingress of said products into the meter at breakage of the film and covered by protection film from above. Besides, this system comprises control, indication and data transfer unit including pneumoelectric and electric devices equipped with programmable logical controller and digital processing program. Note here that it incorporates extra intake-and-discharge station coupled with the first one to make the pump. Said intake-and-discharge stations are identical and consist of two-way orifice valves while top covers accommodate sample level pickups and vacuum and pressure feed valves. Union to feed material at rarefaction of two-way orifice valves of both stations are interconnected via T-bend and flexible hose and connected with top union of flow measuring cell while union to feed material under pressure are interconnected by T-bend with flexible hose to drain measured sample portion in accumulation tank. Accumulation tank comprises union at its top part to receive sample from primary sampling system, measured sample return line, air separator and flushing water feed valve. Its bottom comprises T-bend connected with controlled drain valve and flexible hose for connection with measuring cell bottom union. Note here that air separator is composed of diffuser provided with conical splitter.

EFFECT: higher accuracy of measurements, continuous sample mixing, sample feed at rarefaction.

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