Plural component proportioning system and method

Patent metadata

Field	Value
Publication number	US-10162370-B2
Application number	US-201414786305-A
Country	US
Kind code	B2
Filing date	Apr 28, 2014
Priority date	Apr 26, 2013
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A plural component dispensing system 10 receives separate fluid components, mixes the components in a predetermined ratio, and dispenses the components as mixture. Each fluid component is supplied by a separate pump 12A, 12B to an individual variably controllable fluid regulator 14A, 14B. Each fluid component is supplied from its individual fluid regulator 14A, 14B through a flow meter 18A, 18B to a mixing device 20. The ratio of the components delivered to the mixing device 20 is controlled by the individual fluid regulators 14A, 14B based upon the flow rates measured by the flow meters 18A, 18B.

First claim

The invention claimed is:

1. A system comprising:
a plurality of positive displacement pumps, each pump for delivering a separate fluid component;
a plurality of fluid regulators, each fluid regulator connected to one of the pumps for regulating fluid pressure of one of the fluid components;
a plurality of flow meters, each flow meter for measuring flow rate of one of the fluid components;
a device for receiving and mixing the separate fluid components to produce a mixture so that an immediate chemical reaction begins taking place; and
a control system that includes a plurality of actuators, each actuator controlling one of the fluid regulators, each actuator providing variable air pressure to the fluid regulator that it controls to produce a regulated fluid pressure at an output of the fluid regulator that is a function of the variable air pressure, wherein only one of the plurality of actuators is manually adjustable to set the regulated fluid pressure of the one actuator and a remainder of the plurality of actuators are responsive to the control system to control respective regulated fluid pressures based on respective sensed flow rates and thereby produce a desired ratio of the separate fluid components.

2. The system of claim 1 , wherein the fluid components include a base component and a catalyst component.

3. The system of claim 1 , wherein the control system includes a controller that controls each of the remainder of the plurality of actuators based on a desired target ratio input and at least one sensed flow rate.

4. A method comprising:
individually pumping a plurality of separate inert fluids;
individually measuring flow rate of each of the separate inert fluids;
delivering the separate inert fluids to a receiving device;
individually regulating fluid pressure of each of the separate inert fluids to produce a desired target ratio of the separate inert fluids delivered to the receiving device;
mixing the separate inert fluids at the receiving device to produce a mixture and so that an immediate chemical reaction begins taking place; and
delivering the mixture to a dispenser;
wherein individually regulating the fluid pressure of each of the separate inert fluids comprises providing, for each separate inert fluid, variable air pressure to a fluid regulator that regulates fluid pressure of that fluid to produce a regulated fluid pressure for that fluid at an output of the fluid regulator that is a function of the variable air pressure, and wherein providing a variable air pressure of each fluid regulator comprises providing a manually set air pressure to only one of the fluid regulators and providing respective air pressures to each remaining fluid regulator that is responsive to a controller.

5. The method of claim 4 , wherein the separate fluids include a base component and a catalyst component.

6. A fluid mixing system comprising:
a first pump for delivering a pressurized first fluid;
a second pump for delivering a pressurized second fluid;
a first fluid regulator for regulating fluid pressure of the first fluid;
a second fluid regulator for regulating fluid pressure of the second fluid;
a first flow meter for measuring flow rate of the first fluid;
a second flow meter for measuring flow rate of the second fluid;
a mixing device for receiving and mixing the first fluid and the second fluid to produce a mixture, based on a mix ratio of the first fluid and second fluid, so that an immediate chemical reaction begins taking place;
a controller that causes the second fluid regulator to regulate the fluid pressure of the second fluid so that the flow rate of the second fluid is scaled to the measured flow rate of the first fluid to produce the mix ratio;
a first actuator for supplying a first pressure to the first fluid regulator to produce a first regulated fluid pressure at an output of the first fluid regulator that is a function of the first pressure, wherein the first regulated fluid pressure is manually adjustable via the first actuator, the first regulated fluid pressure being the only manually adjustable regulated fluid pressure; and
a second actuator, responsive to the controller, for supplying a second control pressure to the second fluid regulator to produce a second regulated fluid pressure at an output of the second fluid regulator, wherein the second actuator is responsive to the controller.

7. The system of claim 6 , wherein the first fluid is a base component and the second fluid is a catalyst component.

Assignees

• Graco Minnesota Inc

Inventors

• Bordwell David A
• Mcmichael Jonathan R
• Vo Thomas V

Classifications

• Y10T137/2499

  Mixture condition maintaining or sensing · CPC title

• G05D11/131

  by measuring the values related to the quantity of the individual components (G05D11/139 takes precedence) · CPC title

• B05B12/006

  Pressure or flow rate sensors · CPC title

• B05B12/1436

  the controlling condition of the first liquid or other fluent material in the first supply line being its flow rate or its pressure · CPC title

• B05B7/04

  with arrangements for mixing liquids or other fluent materials before discharge (mixing in general B01F, e.g. B01F25/00; mixing valves F16K11/00) · CPC title