Continuous liquid proportioning system
First Claim
1. A liquid proportioning system comprising:
- first and second groups of positive metering tanks, both connected to a mixer and arranged for alternate feeding to said mixer, each of said groups including a plurality of positive metering tanks, each containing a supply of liquid component to be mixed, and each being connected to a supply source of liquid component for filling said tank,means connecting the tanks in each of said groups for maintaining a uniform pressure in said tanks above the liquid component therein,each positive metering tank including adjustable outlet means for feeding a selected volume of the contained liquid component from the tank per unit of time and in constant selected proportion to the liquid components fed from the other metering tanks in its group,a single conduit connecting the outlet means of each metering tank in one group to said mixing tank, whereby the liquid components fed from said metering tanks flow continuously in exact measured proportions through said conduit to said mixer,a reservoir tank connected to the outlet of said mixer,means connecting the outlet of said reservoir tank to a point of use,and control means for closing the outlet means of the metering tanks of one group when said one group of tanks becomes depleted, opening the outlet means of the other group of metering tanks, and causing said one group of tanks to be refilled from said supply source while said other group of tanks is feeding liquid to said mixer.
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Abstract
A liquid proportioning system includes two groups of positive metering tanks, each group consisting of at least two tanks each containing a supply of liquid to be blended and including outlet control device for selectively regulating the volume of liquid leaving the tank per unit of time. The liquids from each tank are fed together through a single conduit to a mixer which continuously blends the liquid components as they are flowing, and the blended liquids are fed to a reservoir tank, from which they are fed to a point of use in accordance with the variable requirements of the latter. One group of positive metering tanks feeds the liquid components to the mixer in exact proportions until these tanks are depleted, at which time the flow from these tanks is shut off automatically and the second group of tanks begins to feed the portioned liquid components to the mixer, while the first group of tanks are refilled. When the requirements of the point of use are decreased, sensors slow down the feeding of the liquid to the reservoir tank by increasing the time interval between the emptying of one group of metering tanks and the commencement of feeding from the other group of tanks.
26 Citations
10 Claims
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1. A liquid proportioning system comprising:
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first and second groups of positive metering tanks, both connected to a mixer and arranged for alternate feeding to said mixer, each of said groups including a plurality of positive metering tanks, each containing a supply of liquid component to be mixed, and each being connected to a supply source of liquid component for filling said tank, means connecting the tanks in each of said groups for maintaining a uniform pressure in said tanks above the liquid component therein, each positive metering tank including adjustable outlet means for feeding a selected volume of the contained liquid component from the tank per unit of time and in constant selected proportion to the liquid components fed from the other metering tanks in its group, a single conduit connecting the outlet means of each metering tank in one group to said mixing tank, whereby the liquid components fed from said metering tanks flow continuously in exact measured proportions through said conduit to said mixer, a reservoir tank connected to the outlet of said mixer, means connecting the outlet of said reservoir tank to a point of use, and control means for closing the outlet means of the metering tanks of one group when said one group of tanks becomes depleted, opening the outlet means of the other group of metering tanks, and causing said one group of tanks to be refilled from said supply source while said other group of tanks is feeding liquid to said mixer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification