Abstract Simplified apparatus is provided for injecting controlled amounts of a chemical housed within a container into a liquid, such as water, flowing through a pipe. A ''''T'''' fitting is coupled into the pipe through which the liquid is flowing by means of a second T fitting or in any other convenient manner. A length of tubing coupling the output from a container holding the chemical to be injected extends coaxially through the T and into the pipe through which the liquid is flowing, terminating just short of the opposite side thereof. A second length of tubing is coupled between the right angle extension from the T to the inlet of the container. The area at the outlet of the tubing extending through the T is smaller than the area surrounding the tubing through which the liquid in the pipe may pass to communicate with the second piece of tubing which leads to the container inlet. Thus, in effect, a suction is observed at the outlet terminal which draws liquid flowing through the pipe into the container, where it mixes with the chemical therein, and back into the pipe conveying the liquid. Flow rate through the container, and hence the concentration of chemical injected into the liquid flowing through the pipe, is controlled by a conventional valve on the inlet side to the container. Additionally, a second conventional valve may be added to the inlet side to the container and a third conventional valve to the outlet side of the container to permit complete isolation of the container to facilitate replenishing the chemical contained therein. If necessary to conform to building codes, a check valve may be inserted into the line on the inlet side of the container.
Apparatus for injecting one or a mixture of chemicals into liquid flowing through a pipe comprising: a. a T fitting having first and second aligned openings and a third opening; b. means for placing said first opening in a liquid communication with the liquid flowing through the pipe; c. a container for chemicals, said container having an inlet opening, an outlet opening, and a refill opening for replenishing the chemical supply therein; d. cap means for sealing off said refill opening; e. inlet tubing means coupling said third opening in said T to said inlet opening in said container; f. flow rate control means in line with said inlet tubing for regulating the flow there through; g. outlet tubing means connected at one end thereof to said outlet opening in said container, said outlet tubing passing through a liquidtight fitting at said second opening in said T, coaxially through said T and into the pipe, terminating in the opposite half thereof and within less than one-half inch from the opposite side of the pipe; and h. the dimensional proportions of said T and said outlet tubing being such that the area defined by the inside diameter of said outlet tubing is less than the area defined by the outside diameter of said outlet tubing and the inside diameter of said T.
Claim 2
Dependent Claim
221 words
Apparatus for injecting one or a mixture of chemicals into liquid flowing through a pipe comprising: a. a T fitting having first and second aligned openings and a third opening; b. means for placing said first opening in a liquid communication with the liquid flowing through the pipe; c. a container for chemicals, said container having an inlet opening, an outlet opening, and a refill opening for replenishing the chemical supply therein; d. cap means for sealing off said refill opening; e. inlet tubing means coupling said third opening in said T to said inlet opening in said container; f. flow rate control means in line with said inlet tubing for regulating the flow there through; g. outlet tubing means connected at one end thereof to said outlet opening in said container, said outlet tubing passing through a liquidtight fitting at said second opening in said T, coaxially through said T and into the pipe, terminating in the opposite half thereof and within less than one-half inch from the opposite side of the pipe; and h. the dimensional proportions of said T and said outlet tubing being such that the area defined by the inside diameter of said outlet tubing is less than the area defined by the outside diameter of said outlet tubing and the inside diameter of said T.
Claim 3
Dependent Claim
22 words
The apparatus of claim 1 in which said flow rate control means comprises a first valve serially disposed in said inlet tubing.
Claim 4
Dependent Claim
50 words
The apparatus of claim 2 which further includes: a. a first shutoff valve serially disposed in said inlet tubing; and b. a second shutoff valve serially disposed in said outlet tubing whereby said container may be isolated to permit replenishment of the chemicals contained therein by removing said cap means.
Claim 5
Dependent Claim
56 words
The apparatus of claim 3 in which said means for placing said first opening in liquid communication with the liquid flowing through the pipe comprises a second T with first and second aligned openings arrayed as a constituent of the pipe and a third opening for threadably joining with said first opening in said first T.