초록 ▼

A slurry mixing and pumping system adapted to automatically control both slurry viscosity and product output volume. Water and raw gypsum delivered to a mixing vat are thoroughly blended by a hydraulically powered agitator blade within the vat. Hydraulic pressure variations experienced by the agitat

A slurry mixing and pumping system adapted to automatically control both slurry viscosity and product output volume. Water and raw gypsum delivered to a mixing vat are thoroughly blended by a hydraulically powered agitator blade within the vat. Hydraulic pressure variations experienced by the agitator motor are translated into pneumatic viscosity control signals by a process controller. An air actuated water valve driven by the controller varies water input into the vat to effectuate viscosity correction. Means responsive to vat head level controls output volume.

대표청구항 ▼

An automatic, volume controlled slurry production blending and pumping machine comprising: vat means for receiving a powdered or aggregate raw material and a liquid to be mixed therewith whereby to form a slurry mixture; remote hopper means for initially periodically receiving raw powdered or aggreg

An automatic, volume controlled slurry production blending and pumping machine comprising: vat means for receiving a powdered or aggregate raw material and a liquid to be mixed therewith whereby to form a slurry mixture; remote hopper means for initially periodically receiving raw powdered or aggregate material and mechanical means for conveying said material to said vat means; agitator means having blade means within said vat means for blending said slurry mixture; hydraulic motor means for actuating said agitator blade means; means for sensing hydraulic pressure variations experienced by said hydraulic motor means whereby to derive a pneumatic control signal proportional to slurry viscosity; valve means for controlling the introduction of liquid into said vat means for receiving a powdered or aggregate raw material, said valve means responsive to said pneumatic control signal whereby liquid flow rate is generally proportional to the viscosity of said slurry mixture; variable speed pump means for outputting slurry from said vat means; and, vat head level sensing means for regulating slurry output volume, said vat head level sensing means comprising: ultrasonic means associated with said vat means for monitoring the slurry mixture; and, power supply means responsive to said ultrasonic means for variably powering said variable speed pump means for directly controlling slurry output volume independently of slurry viscosity and independently of raw product weight variations experienced by said remote hopper means mechanical conveying means.