GB1327380A - Apparatus for diluting and dispensing a concentrated liquid - Google Patents

Abstract

1327380 Mixing liquids W E BEAN and B M BEAN 11 Sept 1970 [17 Sept 1969] 48519/69 Heading B1C An apparatus for diluting and dispensing a concentrated liquid, comprises a mixing vessel 10, a container 1 for diluent which is supplied to the mixing vessel through a conduit 6 which is controlled by two valves 5, 7 in series, a metering device for supplying a predetermined quantity of concentrated liquid to the mixing vessel, and means 36 for discharging the mixed liquids when they reach a predetermined level to an actuating cylinder 33, the actuating cylinder being pivotally mounted for discharging its contents to a tank 40 when they reach a predetermined weight, the valve 5 being arranged to be closed by the pivotal movement of the actuating cylinder, and the valve 7 being connected to a float in the tank to close when a predetermined liquid level in the tank is reached. Counterbalance means in the form of weights 30 (Fig. 2) on one end of a pivoted arm 28 controlling the valve 5 and connected by a link 32 to the actuating cylinder, may be provided to restore the actuating cylinder to its initial position after discharge of the mixed liquids and simultaneously to re-open the valve 5 for commencement of a further cycle of diluting and dispensing the concentrated liquid. The metering device may be a dipping cup 26 carried on a pivoted pipe 25 through which it delivers its contents to the mixing vessel when a detent 44 holding one end of the pipe is released by the upward movement of the link 32. The cup is lowered into the concentrated liquid reservoir 23 by the action of a float 27. In a modification, Fig. 4, the dipping cup assembly is replaced by a fixed metering container 60 connectable alternatively to the concentrated liquid reservoir 17 for filling or to the mixing vessel for discharge by a changeover valve 62 operated by the arm 28 through a link 66. When the mixing vessel discharges (i.e. the arm 28 pivots downwards) the valve allows filling of the metering container through conduits 61, 63, and when the mixing vessel has emptied (i.e. the arm 28 returns to its original position) the valve allows the contents of the metering container to empty into the mixing vessel through conduits 63, 64. In a further modification, Fig. 3 (not shown) the metering container 60 is replaced by a container (54) which is fixed to one end of the arm 28 and connected by separate pipes (52), (57) to the concentrated liquid reservoir and mixing vessel respectively so that when the arm 28 pivots downwards the container is filled with concentrated liquid (through the pipe 52) and when the arm returns to its original position the container empties (through the pipe 57) into the mixing vessel. The apparatus may be applied for use in water treatment for boiler feed water, air conditioning and refrigeration water cooling systems, the control of alkalinity and pH value, and the diluting and mixing of liquid fertilizers, fungicides and insecticides.