초록 ▼

A proportioning system for creating admixture from diluent and concentrate comprises accumulators which are alternatively repetitively recharged so that one is always on-line. Recharging is controlled by a fluid system including a piston assembly for injecting a measured charge of concentrate into a

A proportioning system for creating admixture from diluent and concentrate comprises accumulators which are alternatively repetitively recharged so that one is always on-line. Recharging is controlled by a fluid system including a piston assembly for injecting a measured charge of concentrate into an accumulator being recharged. Diluent is introduced by opening and closing a valve from the diluent supply with the recharging being activated and terminated by level sensing switches associated with the accumulators. Electrical control circuitry and a stroke adjustment mechanism for the piston assembly are also disclosed.

대표청구항 ▼

Apparatus for mixing two liquids, normally a concentrate and a diluent, to form an admixture of desired concentration and for delivering admixture to work stations, said apparatus comprising a plurality of accumulators for accumulating admixture upstream of the work stations, a reservoir for contain

Apparatus for mixing two liquids, normally a concentrate and a diluent, to form an admixture of desired concentration and for delivering admixture to work stations, said apparatus comprising a plurality of accumulators for accumulating admixture upstream of the work stations, a reservoir for containing one of said liquids, a supply of the other of said liquids, a delivery line for delivering admixture to the work stations, means for selectively connecting said accumulators on and and off said delivery line, means for recharging an off-line accumulator while another of said accumulators is on-line, said recharging means comprising a piston assembly which is operable to draw a measured charge of said one liquid from said reservoir and to inject the measured charge into a particular off-line accumulator which is being recharged, a valve for controlling the introduction of said other liquid into the particular accumulator being recharged, sensing means for sensing different levels of admixture in said accumulators, and control means for opening said valve to cause said other liquid to flow into the particular accumulator being recharged in response to said sensing means sensing a given low level of admixture in the particular accumulator being recharged, and for closing said valve in response to said sensing means sensing a given high level of admixture in the particular accumulator being recharged, said sensing means defining a known volume in each accumulator between the given high and low levels thereof thereby to attain the desired admixture concentration in a fully recharged accumulator per measured charge of said one liquid injected into the accumulator during recharging.