US 5,176,189 AGranted

Device for transport of material between chambers at different pressures and process for operation of this device

AssigneeMaschinenfabrik Andritz Actiengesellschaft

InventorsHeinz Perchthaler, Franz Krappmann

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Abstract

A device for transport of material between chambers at different pressures, comprises a feed chamber, a main chamber having an upper housing with an inlet and a lower housing with an outlet. The feed chamber is coupled to the main chamber at the inlet, and a first slide valve opens and closes the inlet. A second slide valve for opening land closing the outlet may be provided. At least one hollow gasket with an essentially closed wall, preferably an inflatable gasket, is provided between the upper housing and the first slide valve for sealing the inlet; and, at least one gasket with an essentially closed wall, preferably an inflatable gasket, may be provided between the lower housing and the second slide valve for sealing the outlet. Alternatively, a first flap valve for opening and closing the inlet is provided which is pivotally coupled to the upper housing at one side. At least one hollow gasket with an essentially closed wall, preferably an inflatable gasket, is coupled between the upper housing and the first flap valve for sealing the inlet.

A device for transport of material between chambers at different pressures, comprising:

a feed chamber;
a main chamber defining a material passage, said main chamber having an upper housing with an inlet and a lower housing with an outlet, said feed chamber coupled to said main chamber at said inlet;
a first slide valve means for opening and closing said inlet;
a second slide valve means for opening and closing said outlet;
a first laterally disposed slide valve chamber in said upper housing, said first slide valve means being movable within said first slide valve chamber;
a second laterally disposed slide valve chamber in said lower housing, said second slide valve means being movable within said second slide valve chamber;
at least one first flexible, endless, inflatable, hollow gasket means with a completely closed wall coupled between said upper housing and said first slide valve means outwardly spaced from said material passage for sealing said inlet and said slide valve in the closed position;
at least one second flexible, endless, inflatable, hollow gasket means with a completely closed wall coupled between said lower housing and said second slide valve means outwardly spaced from said material passage for sealing said slide valve in the closed position and said outlet;
a pressure medium source communicating with each said hollow gaskets for introducing a pressure medium to said hollow gaskets;
a shut-off device coupled between said pressure medium source and said hollow gaskets for opening and closing said hollow gaskets;
first endless scraper means completely surrounding said material passage and being positioned in said first slide valve chamber between said material passage and said first hollow gasket and having at least one side wall facing said hollow gasket;
each of said slide valve chambers having a pair of opposing side walls disposed opposite said slide valve means, one of said walls of said slide valve chambers having a recess with side walls;
said first endless scraper means being positioned in said recess and being supported by a side wall of said recess facing said hollow gasket.

10 more elements

Abstract

Claims26