Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1998-04-03
2000-08-22
Hepperle, Stephen M.
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
137114, 137495, 13763014, 137907, F16K 1120
Patent
active
061055980
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to low capacity gas feed systems of the type for use in feeding chlorine gas to a water supply to chlorinate the water. More specifically the invention relates to gas flow regulators for controlling the flow of gas from gas cylinders and valves for controlling gas flow from one gas supply to another gas supply.
BACKGROUND PRIOR ART
Low capacity chlorine gas feed systems provide for the supply of gas from chlorine gas containers through a gas pressure regulator device to an injector wherein the chlorine gas is delivered to a water supply conduit. One prior art chlorine feed system is illustrated in the assignee's Technical Data Sheet 910.250 titled "SONIX 100.TM. Chlorinator." Attention is also directed to the Konkling U.S. Pat. No. 3,779,268 illustrating a prior art regulator valve for a chlorine gas system.
One limitation of prior art chlorine gas supply systems is the amount of chlorine which can be delivered to the water supply. Use of a single gas cylinder permits the discharge of chlorine gas only at a limited flow rate before frosting of the valve makes the gas regulator valve inoperative.
In many areas, chlorine gas suppliers require that chlorine tanks be emptied completely before they can be returned to the supplier for refilling. Prior art gas regulation systems have not provided an effective mechanism for insuring efficient use of all of the chlorine in the tanks. In other areas, chlorine gas suppliers require that chlorine tanks returned for refilling contain a predetermined quantity of chlorine in the tanks. Prior art gas regulation systems do not provide an effective mechanism for controlling the amount of gas left in the gas supply cylinders.
Another limitation of prior art chlorine gas systems is that they have not provided an effective and efficient system for switching over from one chlorine supply container to another chlorine supply container once the supply in the first container is exhausted.
Another limitation of prior art gas feed systems including an arrangement for switching from one gas supply cylinder to another cylinder is that they do not insure complete use or controlled use of the gas in the first container.
Another disadvantage of prior art gas supply systems is that they require mechanically complex regulator valve assemblies and are expensive to manufacture and can be unreliable.
SUMMARY OF THE INVENTION
The present invention provides a gas feed system for supplying a gas, and can be used to supply gas such as chlorine to a water system for chlorinating the water. The gas feed system includes a pair of gas containers or multiple banks of containers and provides for automatic switch over from one container or a bank of containers to a second container or bank of containers once the first container or bank of containers is empty and such that the first containers can be completely emptied. The gas feed system of the invention also provides for automatic switch over from one bank of containers to a second bank of containers while providing for complete emptying of the first bank of containers.
The gas feed system of the invention facilitates the use of two sets or banks of multiple tanks of gas. When used to supply chlorine to a water system, the gas supply system can have one bank of tanks supplying chlorine to an injector while the other bank of tanks can remain in a standby condition and such that the second bank of tanks will automatically supply chlorine to the water supply when the amount of gas in the first bank of tanks falls below a predetermined level. Additionally, the tanks in each bank of tanks will discharge even quantities of gas. Gas discharged from a single tank can be limited by frosting that occurs in the control valves. The provision of multiple tanks in parallel permits the discharge of sufficient amounts of gas, and the provision of an even draw-down device embodied in the invention provides for uniform simultaneous discharge from a pair of gas tanks or cylinders.
Another principle feature of the inven
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Cabrera Mario D.
Stockinger Gregory
Van Grouw Albert
Hepperle Stephen M.
United States Filter Corporation
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