초록 ▼

A dust trap is disclosed including a pair of coaxially mounted dust valves. Each valve has a valve body with a flow path therethrough. A cylindrical seat is mounted in each body and a frustro conical flapper is provided having an angled surface which seats against a beveled internal surface of the s

A dust trap is disclosed including a pair of coaxially mounted dust valves. Each valve has a valve body with a flow path therethrough. A cylindrical seat is mounted in each body and a frustro conical flapper is provided having an angled surface which seats against a beveled internal surface of the seat. The flapper is mounted on an actuator shaft and rotates from a seated position to an open position substantially parallel to the flow path. A deflector is mounted in the seat and a wear plate is provided along an internal wall of the body opposite the actuator shaft so that dust passing through the valve does not impinge on the open flapper. An access door is also provided to inspect, clear or replace the flapper and seat.

대표청구항 ▼

A dust valve body having a flow path therethrough from one end to the other; a conduit member removably mounted in said valve body and forming a valve seat, the flow path through said conduit member being substantially coaxial with the flow path through said valve body, said conduit member being sub

A dust valve body having a flow path therethrough from one end to the other; a conduit member removably mounted in said valve body and forming a valve seat, the flow path through said conduit member being substantially coaxial with the flow path through said valve body, said conduit member being substantially cylindrical and forming said valve seat on a radial internal edge thereof; a valve actuator shaft passing through said valve body adjacent a side of said valve body and means for rotating said shaft; a frustro conical valve flap and self aligning means carried thereby for engaging said flap at its frustro conical surface with the radial edge of said seat, said flap removably coupled to said valve actuator shaft for moving into and out of engagement with said valve seat whereby a seal will be maintained between the frustro conical surface of said flap and the radial edge of said seat; means for deflecting the flow through said conduit and said valve body so that when said flap is fully rotated out of engagement with said valve seat said flow will not impinge upon the surface thereof; and access means carried by said valve body for providing access to the interior of said body for removal of said conduit member and said valve flap from inside said valve body; said conduit member being disposed adjacent the upper portion of said valve body and said valve seat is disposed substantially perpendicular to the vertical longitudinal axis of said valve body; said means for deflecting the flow includes a semicircular flange disposed within said conduit member opposite said valve seat to deflect the flow towards a further deflecting means comprising a wear plate; said wear plate disposed adjacent the side of said valve body opposite the valve actuator shaft.