SLUDGE FLOW MEASURING SYSTEM

摘要

A sludge flow monitoring system and method measures volume of sludge pumped by a positive displacement pump through a pipeline by determining a fill percentage during each pumping cycle. The start and end of each piston stroke are identified by hydraulic system sensors. The fill percentage is determined based upon a first summation of periodic piston speed command values from the start of a pumping stroke to the end of a pumping stroke, and a second summation of periodic piston speed command values from a poppet valve opening indicating output flow from the pump to the end of the pumping stroke.

主权项

1. A method of monitoring operation of a hydraulic driven positive displacement piston/cylinder sludge pump having a inlet for receiving sludge material and an outlet at which sludge material is delivered, the method comprising:
sensing when a hydraulic drive starts a pumping stroke of the pump; sensing when, during the pumping stroke of the pump, the sludge material begins to flow out of the cylinder; sensing when the hydraulic drive ends the pumping stroke; and determining an output value based upon periodic piston speed command data collected during (a) a whole stroke period defined by when hydraulic drive starts and ends the pumping stroke and (b) a filled stroke period defined by when sludge material begins to flow out of the cylinder and when the hydraulic drive ends the pumping stroke.