Liquid purification or separation – Flow – fluid pressure or material level – responsive – Filter cleaning
Patent
1992-03-23
1993-07-13
Savage, Matthew O.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Filter cleaning
2102421, 210330, 210338, 210341, 2104161, 210409, 210460, 210540, B01D 2124
Patent
active
052270505
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND
1. Field of the Invention
This invention relates generally to suction extractors for liquids, and more particularly to such extractors for liquids with a tendency to foam, such as emulsions.
2. Discussion of Related Art
One known suction extractor provides for extracting emulsions, particularly cooling lubricants. The suction-extracted emulsions are worked up, disposed of or tested in measuring arrangements, for example for pH values, conductivity, concentration and turbidity. As a result of foaming and soiling of the liquid, known suction extractors are vulnerable to clogging of the intake systems and also to the unwanted intake of air through foaming around the intake pipe.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to establish a relatively clean and foam-free environment around the intake pipe of a suction extractor in conjunction with a stable liquid surface, and to enable the intake system to be readily cleaned should blockages still occur. The present improved suction extractor in one embodiment includes an outer second bowl which surrounds an inner first bowl. The outer second bowl opens upwards in the working position of the suction extractor, which the latter is arranged in such a way that, in the working position, only the liquid situated inside the outer bowl flows into the inner bowl. The wall of the suction extractor has at least one opening that lies at least partly below the liquid surface in the working position. The rim of the outer bowl is positioned above the liquid surface in the working position and the openings of the outer bowl are offset relative to the openings of the inner bowl in such a way that they do not lie on a radial line.
The above-mentioned openings of the outer and inner bowls may be both holes and slots or may assume other corresponding forms. The openings of the bowls are offset so that the sludge and foam present in the liquid first settles in the outer bowl, and only the liquid freed from sludge and foam flows off into the inner bowl and hence into the space around the intake pipe. The bowls may assume any geometric form. The suction extractor according to the invention improves the transportability of the liquids to such an extent that liquids laden with solids, liquids of lower density than water and even liquids laden with agglomerated solids lower in density than water, turbulent liquids, and liquids in baths varying in their liquid level can be suction-extracted without difficulty.
In order further to improve the stability of the intake system floating on the liquid in another embodiment of the invention, closed hollow chambers are provided inside the outer bowl, particularly in its lower part.
To avoid the direct outflow of liquid from the outer bowl through the inner bowl into the intake pipe, and to ensure that sludge settles out and foam is retained, in another embodiment of the invention, the openings of the intake pipe are offset relative to the openings of the inner bowl in such a way that they do not lie on a radial line.
In the case of highly turbulent baths, the foam is retained particularly effectively by a foam collar arranged between the intake pipe and the inner bowl or between the inner bowl and the outer bowl in yet another embodiment of the invention. The foam collar is in the form of a cylindrical casing with openings which, in particular, are offset relative to the openings of the adjoining walls in such a way that they do not lie on a radial line. The function of the foam collar is to reduce foaming and to cover the inflowing liquid. The foam collar may readily be formed by a pipe collar.
In another embodiments in the event of turbulent movement of the liquid surface or major changes in the liquid level, the intake system is held in its position relative to the liquid surface by a universal joint between the intake pipe and the intake line leading away from the intake pipe.
In another embodiment of the suction extractor according to the invention, the foam on the surface of the liquid around th
REFERENCES:
patent: 1450454 (1923-04-01), Hans
patent: 2957579 (1960-10-01), McCombie
patent: 4132645 (1979-01-01), Bottomley et al.
patent: 4997556 (1991-03-01), Yano et al.
Henkel Kommanditgesellschaft auf Aktien
Jaeschke Wayne C.
Savage Matthew O.
Szoke Ernest G.
Watov Kenneth
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