Vacuum valve for closing a flow path with a two-part valve disk
First Claim
1. A vacuum valve for substantially gas-tight interruption of a flow path, comprisinga valve housing having a first wall which has a first opening for the flow path with a geometric opening axis and a valve seat enclosing the first opening on a first side of the valve housing,a valve disk havingin particular an annular or frame-like first disk section with an outer boundary anda closed second disk section which is linearly movably mounted in a sealed manner within the outer boundary in the direction parallel to the opening axis relative to the first disk section between a retracted position and an extended position,at least one drive which is connected to the first disk section and which is formed such that the valve disk is pivotable or displaceable betweenan open position, in which the valve disk is positioned in a dwell section arranged laterally next to the first opening and releases the first opening and the flow path, andan intermediate position, in which the valve disk is positioned above the first opening and covers the opening cross-section of the first opening, by means of a transverse movement taking place substantially transversely to the opening axis, and is displaceable betweenthe intermediate position anda closed position, in which there is a gas-tight contact between the first disk section and the valve seat which closes the first opening in a gas-tight manner and interrupts the flow path, by means of a longitudinal movement taking place parallel to the opening axis,wherein in the closed position a pressure difference on the valve disk acts substantially on the movable second disk section and the second disk section is supported directly or indirectly on the valve housing in the direction parallel to the opening axis substantially decoupled from the first disk section, whereinthe valve seat has a sealing surface facing axially in the direction of the valve disk and extending transversely to the opening axis,the first disk section has a first bearing surface facing axially in the direction of the valve seat and extending transversely to the opening axis, which is arranged and formed such that in the closed position via an intermediate first seal there is an axially sealing contact with the sealing surface in a first contact area,the outer boundary has an inner surface facing radially inwards and extending parallel to the opening axis,the second disk section has an outer surface facing radially outwards and extending parallel to the opening axis, which is arranged and formed such that via an intermediate second seal a radially sealing contact is achieved with the inner surface via a second contact area between the retracted position and the extended position, andat least for certain radial angles about a center of the valve disk a first radial distance from the center to the first bearing surface is smaller than a second radial distance from the center to the second contact area.
1 Assignment
0 Petitions
Accused Products
Abstract
A vacuum valve including a valve housing with seat surrounding a first opening with a sealing surface is disclosed. A valve disk having a first disk section and a second disk section tightly mounted inside an outer boundary of the first disk that is movable parallel to an opening axis. A drive is connected to the first disk section. The first disk section includes a first bearing surface configured to contact the sealing surface in the closed position. The outer boundary has a radially inwardly oriented inner surface. The second disk section has a radially outwardly oriented outer surface configured to contact the inner surface sealing a second contact area. At least for determined radial angles about a center of the valve disk, a first radial distance from the center to the first bearing surface is shorter than a second radial distance from the center to the second contact area.
20 Citations
20 Claims
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1. A vacuum valve for substantially gas-tight interruption of a flow path, comprising
a valve housing having a first wall which has a first opening for the flow path with a geometric opening axis and a valve seat enclosing the first opening on a first side of the valve housing, a valve disk having in particular an annular or frame-like first disk section with an outer boundary and a closed second disk section which is linearly movably mounted in a sealed manner within the outer boundary in the direction parallel to the opening axis relative to the first disk section between a retracted position and an extended position, at least one drive which is connected to the first disk section and which is formed such that the valve disk is pivotable or displaceable between an open position, in which the valve disk is positioned in a dwell section arranged laterally next to the first opening and releases the first opening and the flow path, and an intermediate position, in which the valve disk is positioned above the first opening and covers the opening cross-section of the first opening, by means of a transverse movement taking place substantially transversely to the opening axis, and is displaceable between the intermediate position and a closed position, in which there is a gas-tight contact between the first disk section and the valve seat which closes the first opening in a gas-tight manner and interrupts the flow path, by means of a longitudinal movement taking place parallel to the opening axis, wherein in the closed position a pressure difference on the valve disk acts substantially on the movable second disk section and the second disk section is supported directly or indirectly on the valve housing in the direction parallel to the opening axis substantially decoupled from the first disk section, wherein the valve seat has a sealing surface facing axially in the direction of the valve disk and extending transversely to the opening axis, the first disk section has a first bearing surface facing axially in the direction of the valve seat and extending transversely to the opening axis, which is arranged and formed such that in the closed position via an intermediate first seal there is an axially sealing contact with the sealing surface in a first contact area, the outer boundary has an inner surface facing radially inwards and extending parallel to the opening axis, the second disk section has an outer surface facing radially outwards and extending parallel to the opening axis, which is arranged and formed such that via an intermediate second seal a radially sealing contact is achieved with the inner surface via a second contact area between the retracted position and the extended position, and at least for certain radial angles about a center of the valve disk a first radial distance from the center to the first bearing surface is smaller than a second radial distance from the center to the second contact area.
Specification