LIQUID CHEMICAL MIXING AND DELIVERY SYSTEM

• US 3,804,297 A
• Filed: 06/08/1973
• Issued: 04/16/1974
• Est. Priority Date: 06/08/1973
• Status: Expired due to Term

• Current Assignee: Ojars Jurjans
• Original Assignee: Ojars Jurjans
• Inventors: Jurjans, Ojars
• Primary Examiner(s): Tollberg, Stanley H.
• Assistant Examiner(s): Rolla, Joseph J.
• Application Number:
  US05/368,312
• Time in Patent Office: 312 Days
• Field of Search: 222/52,54,56,64,65 68/12R,17R
• US Class Current: 222/54
• CPC Class Codes: B01F 23/49 Mixing systems, i.e. flow charts or diagrams
• CPC Class Codes: D06F 2103/22 Content of detergent or additives
• CPC Class Codes: D06F 34/08 Control circuits or arrangements thereof
• CPC Class Codes: D06F 39/022 in a liquid state D06F39/024 takes precedence

Abstract

A system for automatic and semi-automatic mixing of chemical solutions and the delivery thereof to a utilization system. A solution vehicle, such as water, and liquid chemical additives are delivered to a solution preparation tank. Sensors in the tank determine when the tank is empty and full, and the temperature of the contents. This information is used to operate an automatic tank control system which controls the delivery of ingredients and of heat to the tank, and the emptying of the tank contents. Alternatively, the emptying function may be controlled manually. By the use of a plurality of solution preparation tanks and respective control systems, together with a sequencing control system, continuous output flow of mixed solution may be obtained.

Claims

1. A liquid mixing and delivery system comprising a solution preparation tank, means for feeding a liquid vehilce to said tank, means for feeding a predetermined quantity of liquid additive to said tank, heating means for said tank, means for withdrawing solution from said tank, an empty sensor for sensing when the tank is substantially empty of solution, a full sensor for sensing when the tank is substantially full with solution, a temperature sensor for sensing the temperature of solution in said tank, first control means for said vehicle feeding means, second control means for said additive feeding means, third control means for said heating means, fourth control means for said solution withdrawing means, means responsive to said empty sensor for operating said first and second control means to initiate liquid vehicle and liquid additive feed to said tank when said tank is substantially empty, means responsive to said full sensor for operating said first control means to terminate vehicle feed to said tank when said tank is substantially full, means responsive to said temperature sensor for operating said third control means to heat the solution in said tank to a predetermined temperature, dumping means for operating said fourth control means, means interlocking said dumping means with said full sensor responsive means and said temperature sensor responsive means for disabling said dumping means when said tank is not substantially full or its contents is below said predetermined temperature.

2. A liquid mixing and delivery system as set forth in claim 1, wherein said first and fourth control means are solenoid valves.

3. A liquid mixing and delivery system as set forth in claim 1, wherein said means responsive to said empty sensor and said full sensor are relays.

4. A liquid mixing and delivery system as set forth in claim 3, wherein said dumping means comprises a switch.

5. A liquid mixing and delivery system as set forth in claim 4, wherein said switch is relay operated in response to said full sensor and temperature sensor.

6. A liquid mixing and delivery system as set forth in claim 3, wherein said first and fourth control means are solenoid valves.

7. A liquid mixing and delivery system comprising a plurality of solution preparation tanks;

for each tank there being means for feeding a liquid vehicle to the tank, means for feeding a predetermined quantity of liquid additive to the tank, heating means fo the tank, means for withdrawing solution from the tank, an empty sensor for sensing when the tank is substantially empty of solution, a full sensor for sensing when the tank is substantially full with solution, a temperature sensor for sensing the temperature of solution in the tank, first control means for said vehicle feeding means, second control means for said additive feeding means, third control means for said heating means, fourth control means for said solution withdrawing means, means responsive to said empty sensor for operating said first and second control means to initiate liquid vehicle and liquid additive feed to the tank when the tank is substantially empty, means responsive to said full sensor for operating said first control means to terminate vehicle feed to the tank wheN the tank is substantially full, means responsive to said temperature sensor for operating said third control means to heat the solution in the tank to a predetermined temperature, dumping means for operating said fourth control means, means interlocking said dumping means with said full sensor responsive means and said temperature sensor responsive means for disabling said dumping means when the tank is not substantially full or its contents are below said predetermined temperature;

means interlocking said dumping means of each tank with the dumping means of all other tanks to disable the dumping of said other tanks on operation of the dumping means of one tank until said one tank is substantially empty.

8. A liquid mixing and delivery system as set forth in claim 7, wherein the dumping means for the different tanks include means having different time response characteristics to cause only one dumping means to response should more than one dumping means be actuated simultaneously.

9. A liquid mixing and delivery system as set forth in cliam 7, wherein each dumping means comprises a switch.

10. A liquid mixing and delivery system as set forth in claim 9, wherein for each tank the dumping means switchhas a relay operator responsive to said full sensor and temperature sensor.