Fluid handling – Systems – Multi-way valve unit
Patent
1991-12-23
1993-10-05
Hepperle, Stephen M.
Fluid handling
Systems
Multi-way valve unit
454274, 454334, F24F 13062
Patent
active
052496023
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an arrangement for controlling flow of gaseous and liquid media, of air in particular, comprising of a housing, a number of movable closing elements shutting off the internal cross-sectional area of said housing and an actuating mechanism coupled with said movable closing members.
For the purpose of controlling the flow of gaseous and liquid media and of air in particular the known louvre arrangements contain strip-like closing members rotatably mounted at one end of their length. On closing of the adjustable flow control arrangement each closing member is moved to lean against the adjacent similar element and closes arranged transversely with respect to the flow path of the medium and the path of flow of the medium. In opened position the closing members are adjusted into the direction of flow by moving them away from each other. The closing members of such type of flow control arrangements are kinematically coupled and remain substantially in plano-parallel position with respect to each other throughout their entire movement, the actuating mechanism causing simultaneous angular displacement of closing members. The actuating mechanism may either be operated manuallay, or by means of a pulling magnet, electric motor, actuating cylinder or some other suitable mechanism. Such flow control arrangements are commercially available, their construction being described under the entry word "air duct" in Vol. II of the Muszaki Lexikon (Technical Encyclopaedia) published by the Akademiai Kiado (Publishing House of the Academy of Sciences, Budapest, 1984) with reference to FIGS. 8 and 9 on page 830.
The deficiencies of the above known arrangement lie on the one hand in the necessity of using a separate operating mechanism which has to be controlled. Thereby the costs rise on the one hand and additive power is consumed on the other hand. A further drawback lies in that the shuttingoff capability is usually insufficient and unsuitable for obtaining reliable shutting.
The object aimed at by the present invention is to provide a flow control arrangement that can be shut off satisfactorily and reliably.
Another object of the invention is to provide for a flow control arrangement that can be controlled by means of a simple actuating mechanism.
A further aim of the invention is to provide a flow control arrangement requiring no additional control means mechanism and auxiliary power.
Another aim is to provide for a flow control arrangement that can be integrally built with a fan and which is adequately protected against accidents by protecting the fan from reaching into it.
The aim set is achieved by a flow control arrangement for the flow control of gaseous and liquid media, particularly air, comprising a housing, a number of movable closing members covering in shut-off position in crosswise direction the internal cross-sectional area of said housing, an actuating mechanism coupled to said movable closing members. In accordance with the invention, the arrangement is provided with fixed closing members coacting with movable closing members, said fixed members constituting a stationary grid incorporating concentric rings. Said movable closing members are designed to form concentric rings constituting an axially displaceable movable grid assembly. When pressed against each other, ring-shaped closing members of the stationary and the movable grid assembly tightly fit to each other, so as to shut off the flow path of the medium. The moving grid is linked up with an actuating mechanism effective in axial direction, pressing the stationary and movable grids against each other when shut off, and moving them apart when opened.
In a preferred embodiment of the invention the louvre elements are conic sections, i.e. essentially part of the mantle of a truncated cone with the required thickness. Of coursse, the cone surface can be modified, i.e. streamlined in order to improve the flow resistance of medium.
With a further advantageous embodiment of the invention the movable grid is provided with a hub su
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Sandor Laszlo
Szalay Zoltan
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