Valve system and improved actuator therefor
AssigneeS.A. des Anciens Etablissements Paul Wurth
InventorPierre H. Mailliet
Life of this patent
Estimating the term…
Abstract
A valve actuator, for example a mechanism for imparting motion to a blast furnace evacuation valve, includes a force generator which is coupled to the valve member by a displacement mechanism including a pivotal lever and a pivot arm. The pivotal lever has a pair of angularly related arms with the free end of one arm being coupled to the force generator and the free end of the second arm being coupled to a point on the pivot arm intermediate the ends thereof by a connecting rod or rods. The pivot arm is connected to the valve member and the connecting rod or rods are articulated to both the pivot arm and to the second lever arm which may be telescoping.
Claims29
In a system for controlling the flow of gas between the interior of an enclosure and the ambient atmosphere via a conduit having an axis, the system including a valve comprising a movable valve member having a sealing surface which cooperates with a stationary valve seat, an improved actuating mechanism for the valve member comprising:
- an elongated movable valve support member, said support member being connected to the valve member and being pivotal about an axis which is displaced from the point of connection of the support member to the valve member;
- means for producing a valve actuation force;
- lever means pivotable about an axis lying in a plane perpendicular to a plane in which the axis of the conduit lies, a first end of said lever means being coupled to said force producing means;
- and
- connecting rod means, said connecting rod means coupling the second end of said lever means to said support member intermediate the ends of said support member, said force producing means providing for the pivoting of said lever means to thereby transmit a valve actuation force via said connecting rod means to said support member to pivot said support member and the valve member between a position where the sealing surface of the valve member cooperates with the valve seat to prevent fluid flow through the conduit and a position where the valve member is completely removed from registration with the conduit.
In a system for controlling the flow of gas between the interior of an enclosure and the ambient atmosphere via a conduit having an axis, the system including a valve comprising a movable member having a sealing surface which cooperates with a stationary valve seat, an improved actuating mechanism for the valve member comprising:
- an elongated movable valve support member, said support member being connected to the valve member and being pivotal about an axis which is displaced from the point of connection of the support member to the valve member;
- means for producing a valve actuation force;
- lever means pivotable about an axis lying in a plane perpendicular to a plane in which the axis of the conduit lies, the axis about which said lever means pivots being parallel to the axis about which said support member pivots, the first end of said lever means being coupled to said force producing means;
- and
- connecting rod means, said connecting rod means coupling the second end of said lever means to said support member intermediate the ends of said support member, said connecting rod means being articulated to said support member and to the second end of said lever means, the angle between said connecting rod means and said lever means being less than 45.degree. with the valve in the closed condition and being in excess of 45.degree. with the valve in open condition.
In a system for controlling the flow of gas between the interior of an enclosure and the ambient atmosphere via a conduit having an axis, the system including a valve comprising a movable valve member having a sealing surface which cooperates with a stationary valve seat, an improved actuating mechanism for the valve member comprising:
- an elongated movable valve support member, said support member being connected to the valve member and being pivotal about an axis which is displaced from the point of connection of the support member to the valve member;
- means for producing a valve actuation force;
- lever means, said lever means including a lever having first and second angularly related arms, said lever means being pivotable about an axis through the junction of said arms, the axis about which said lever means pivots being parallel to the axis about which said support member pivots, the free end of said first lever arm being coupled to said force producing means;
- and
- connecting rod means, said connecting rod means coupling the free end of said lever means second arm to said support member intermediate the ends of said support member, said connecting rod means being articulated to said support member and to said lever means second arm.
In a system for controlling the flow of gas between the interior of an enclosure and the ambient atmosphere via a conduit having an axis, the system including a valve comprising a movable valve member having a sealing surface which cooperates with a stationary valve seat, an improved actuating mechanism for the valve member comprising:
- an elongated movable valve supporting member, said support member being connected to the valve and being pivotal about an axis which is displaced from the point of connection of the support member to the valve member;
- means for producing a valve actuation force;
- lever means pivotable about an axis lying in a plane perpendicular to a plane in which the axis of the conduit lies, said lever means including:
- a first telescoping arm;
- a second arm angularly related to said first arm, said lever means pivoting about the junction of said first and second arms;
- means coupling the free end of said first arm to said force producing means;
- and
- means resiliently biasing said first arm in a first direction whereby said lever means first arm may be elongated in opposition to the resilient biasing during opening closing of the valve, said resilient biasing means thereby aiding and maintaining the valve in the closed position;
- and
- connecting rod means, said connecting rod means coupling the free end of said lever means second arm to said support member intermediate the ends of said support member.
In a system for controlling the flow of gas between the interior of an enclosure and the ambient atmosphere via a conduit having an axis, the system including a valve comprising a movable valve member having a sealing surface which cooperates with a stationary valve seat, an improved actuating mechanism for the valve member comprising:
- an elongated movable valve support member, said support member being connected to the valve member and being pivotal about an axis which is displaced from the point of connection of the support member to the valve member;
- means for producing a valve actuation force;
- lever means pivotable about an axis lying in a plane perpendicular to a plane in which the axis of the conduit lies, said lever means including:
- a first telescoping arm;
- a second arm angularly related to said first arm, said lever means pivoting about the junction of said first and second arms, the axis about which said lever means pivots being parallel to the axis about which said support member pivots;
- means coupling the free end of said first arm to said force producing means;
- and
- means resiliently biasing said first arm in a first direction whereby said lever means first arm may be elongated in opposition to the resilient biasing during closing of the valve, said resilient biasing means thereby aiding and maintaining the valve in the closed position;
- and
- connecting rod means, said connecting rod means being articulated to said support member and to the free end of said lever means second arm, said connecting rod means coupling said lever means to said support member intermediate the ends of said support member.
In a system for controlling the flow of gas between the interior of an enclosure and the ambient atmosphere via a conduit having an axis, an improved valve assembly comprising:
- a stationary valve seat, said valve seat including a compressible sealing ring;
- a movable valve member, said valve member including a protrusion which contacts and compresses the valve seat sealing ring with said valve in the closed position whereby gas flow through the conduit is prevented;
- means for delivering a fluid coolant to the region defined by the sealing surfaces of said valve member and said valve seat and by the protrusion on the valve member and said sealing ring;
- an elongated movable valve support member, said support member being connected to the valve member and being pivotal about an axis which is displaced from the point of connection of the support member to the valve member;
- means for producing a valve actuation force;
- lever means pivotable about an axis lying in a plane perpendicular to a plane in which the axis of the conduit lies, a first end of said lever means being coupled to said force producing means;
- and
- connecting rod means, said connecting rod means coupling the second end of said lever means to said support member intermediate the ends of said support member whereby said force producing means may cause the pivoting of said lever means to thereby transmit a valve actuation force via said connecting rod means to said support member to pivot said support member and the valve member between the valve open and closed position.
Dependencies are inferred from the claim text.