Vacuum valve
First Claim
1. A vacuum valve comprising:
- a valve housing having a valve opening, said valve opening having an axis oriented in the through-flow direction of the valve and is surrounded by a valve seat, a valve plate which is arranged at at least one valve rod and by which the valve opening can be closed in the closed state of the valve;
at least a first piston-cylinder unit by which the valve plate is displaceable from its open position releasing the valve opening into a position which is located opposite the valve opening but is lifted from the valve seat; and
at least a second piston-cylinder unit by which the valve plate can be moved toward the valve seat and pressed against it from its position which is located opposite the valve opening;
wherein a piston rod constructed as a toothed rack is arranged at the piston of the second piston-cylinder unit and meshes with a pinion which is connected with an eccentric arrangement for swiveling the at least one valve rod and pressing the valve plate against the valve seat.
5 Assignments
0 Petitions
Accused Products
Abstract
A vacuum valve comprises a valve opening which is provided in a valve housing and can be closed by a valve plate arranged at least one valve rod, at least a first piston-cylinder unit by which the valve plate is displaceable from its open position releasing the valve opening into a position which is located opposite the valve opening but is lifted from the valve seat, and at least a second piston-cylinder unit by which the valve plate can be moved toward the valve seat and pressed against it from its position which is located opposite the valve opening but is lifted from the valve seat. A first connection line runs between a base of the first piston-cylinder unit and a base of the second piston-cylinder unit, wherein a non-return valve is arranged in the first connection line and closes when there is a pressure in a closing cylinder space of the first piston-cylinder unit that is greater than or equal to the pressure in a closing cylinder space of the second piston-cylinder unit, and a mandrel is provided at the piston of the second piston-cylinder unit, which mandrel releases the non-return valve when the valve plate is in the position in which it is completely lifted from the valve seat.
53 Citations
15 Claims
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1. A vacuum valve comprising:
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a valve housing having a valve opening, said valve opening having an axis oriented in the through-flow direction of the valve and is surrounded by a valve seat, a valve plate which is arranged at at least one valve rod and by which the valve opening can be closed in the closed state of the valve;
at least a first piston-cylinder unit by which the valve plate is displaceable from its open position releasing the valve opening into a position which is located opposite the valve opening but is lifted from the valve seat; and
at least a second piston-cylinder unit by which the valve plate can be moved toward the valve seat and pressed against it from its position which is located opposite the valve opening;
wherein a piston rod constructed as a toothed rack is arranged at the piston of the second piston-cylinder unit and meshes with a pinion which is connected with an eccentric arrangement for swiveling the at least one valve rod and pressing the valve plate against the valve seat. - View Dependent Claims (2, 3, 4)
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5. A vacuum valve comprising:
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a valve opening which is provided in a valve housing having an axis oriented in the through-flow direction of the valve and is surrounded by a valve seat;
a valve plate which is arranged at at least one valve rod and by which the valve opening can be closed in the closed state of the valve;
at least a first piston-cylinder unit by which the valve plate is displaceable from its open position releasing the valve opening into a position which is located opposite the valve opening but is lifted from the valve seat;
at least a second piston-cylinder unit by which the valve plate can be moved toward the valve seat and pressed against it from its position which is located opposite the valve opening but is lifted from the valve seat;
said first piston-cylinder unit having a closing cylinder space, wherein a force acting upon the valve plate in the direction of its position located opposite the valve opening is generated when the closing cylinder space is acted upon by pressure;
said second piston-cylinder unit having a closing cylinder space, wherein a force acting upon the valve plate in the direction of its position in which it is pressed against the valve seat is generated when the closing cylinder space is acted upon by pressure;
the closing cylinder space of the first piston-cylinder unit having a base, wherein the piston of the first piston-cylinder unit is located adjacent to this base in the position of the valve plate which completely releases the valve opening;
the closing cylinder space of the second piston-cylinder unit having a base, wherein the piston of the second piston-cylinder unit is located adjacent to this base in the position of the valve plate in which the latter is completely lifted from the valve seat;
a first connection line running between said base of the first piston-cylinder unit and said base of the second piston-cylinder unit, wherein a non-return valve is arranged in the first connection line and closes when there is a pressure in the closing cylinder space of the first piston-cylinder unit that is greater than or equal to the pressure in the closing cylinder space of the second piston-cylinder unit; and
a mandrel being provided at the piston of the second piston-cylinder unit, which mandrel releases the non-return valve when the valve plate is in the position in which it is completely lifted from the valve seat. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification