초록 ▼

A proportioning pumping system that injects an injection fluid into a pressurized conduit flowing with a working fluid at a constant proportion of injection fluid to working fluid regardless of changes in flow rate or pressure within the working fluid conduit. Injection fluid is pumped continuously,

A proportioning pumping system that injects an injection fluid into a pressurized conduit flowing with a working fluid at a constant proportion of injection fluid to working fluid regardless of changes in flow rate or pressure within the working fluid conduit. Injection fluid is pumped continuously, by the working fluid, from a non-pressurized tank. The system includes two or more vessels, each divided into two chambers by a diaphragm or bladder. Valving and passages simultaneously fill one vessel with working fluid and pump injection fluid while filling the other vessel with injection fluid and draining working fluid. A first pressure differential creating device in the working fluid conduit draws injection fluid into the working fluid conduit. A second pressure differential creating device determines the proportion of working fluid and injection fluid to be combined.

대표청구항 ▼

[ What is claimed is:] [1.] An apparatus for continuously and proportionately injecting an injection fluid into a pressurized conduit flowing with a working fluid, comprising:a first vessel enclosing a first flexible element that divides the first vessel between a first injection fluid chamber and a

[ What is claimed is:] [1.] An apparatus for continuously and proportionately injecting an injection fluid into a pressurized conduit flowing with a working fluid, comprising:a first vessel enclosing a first flexible element that divides the first vessel between a first injection fluid chamber and a first working fluid chamber;a second vessel enclosing a second flexible element that divides the second vessel between a second injection fluid chamber and a second working fluid chamber;a first pressure differential creating device contained within the pressurized conduit and creating therein a first reduced pressure region;a first conduit network that selectively connects the pressurized conduit to the first and second working fluid chambers;a second conduit network that selectively connects the first and second injection fluid chambers to the first reduced pressure region in the pressurized conduit;a control system that automatically and continuously controls the filling emptying and refilling of the first and second injection fluid chambers and the filling, emptying and refilling of the first and second working fluid chambers while ensuring both a continuous flow of working fluid through the pressurized conduit and a continuous flow of injection fluid into the first reduced pressure region at a predetermined proportion that is independent of working fluid flow rate and pressure.