초록 ▼

Method and apparatus for testing an emergency shutdown valve without disrupting the flow of the process during a testing procedure. The apparatus includes an emergency shutdown valve capable of moving about 25% beyond a fully opened position to a fully closed position. The emergency shutdown valve h

Method and apparatus for testing an emergency shutdown valve without disrupting the flow of the process during a testing procedure. The apparatus includes an emergency shutdown valve capable of moving about 25% beyond a fully opened position to a fully closed position. The emergency shutdown valve has a coefficient of flow which is equal to or greater than the normal coefficient of flow for the process when the valve is moved about 25% beyond its fully opened position which provides a means for moving the shutdown valve 50% of its total movement without affecting the coefficient of flow for the process. The apparatus also includes a programmable logic controller including a timer and counter, a valve actuator, valve positioner, and an alarm device for controlling the positioning and movement of the shutdown valve during a timed and scheduled shutdown valve testing process without affecting the flow of the process.

대표청구항 ▼

Method and apparatus for testing an emergency shutdown valve without disrupting the flow of the process during a testing procedure. The apparatus includes an emergency shutdown valve capable of moving about 25% beyond a fully opened position to a fully closed position. The emergency shutdown valve h

Method and apparatus for testing an emergency shutdown valve without disrupting the flow of the process during a testing procedure. The apparatus includes an emergency shutdown valve capable of moving about 25% beyond a fully opened position to a fully closed position. The emergency shutdown valve has a coefficient of flow which is equal to or greater than the normal coefficient of flow for the process when the valve is moved about 25% beyond its fully opened position which provides a means for moving the shutdown valve 50% of its total movement without affecting the coefficient of flow for the process. The apparatus also includes a programmable logic controller including a timer and counter, a valve actuator, valve positioner, and an alarm device for controlling the positioning and movement of the shutdown valve during a timed and scheduled shutdown valve testing process without affecting the flow of the process. ased. 4. The seat apparatus for a vehicle according to claim 1, wherein the lock mechanism includes a rotatable latch adapted to engage the striker and a pawl which is engageable with the latch to prevent the latch from rotating, the pawl being provided with a release pin, the lock handle being connected to a rod, and a release plate extending from the rod for engaging the release pin when the lock handle is rotated to move the pawl out of engagement with the latch and permit the latch to rotate. 5. The seat apparatus for a vehicle according to claim 4, including a spring which applies a biasing force to the rod and the lock handle. 6. The seat apparatus for a vehicle according to claim 1, including an anchor bracket fixed to each lower rail at the front side of the seat portion, each anchor bracket including a mouth portion opening in a forward direction for receiving an anchor pin fixed to a floor of the vehicle. 7. A seat apparatus in a vehicle comprising: a seat portion having a seat cushion; a striker fixedly arranged relative to a floor of the vehicle; a seat slide mechanism for adjusting a position of the seat portion relative to the vehicle floor; a lock mechanism for effecting locking engagement of the seat portion with the striker, the lock mechanism releasing the locking engagement at a predetermined fixed position of the seat portion; a first operation mechanism operable from a rear side of the seat portion for releasing the lock mechanism; and a second operation mechanism operable from the front side and the rear side of the seat portion for releasing the seat slide mechanism. 8. The seat apparatus in a vehicle according to claim 7, further comprising a cancel mechanism which cancels the release of the seat slide mechanism when the first operational mechanism is operated and cancels the release of the lock mechanism when the second operational mechanism is operated. 9. The seat apparatus in a vehicle according to claim 8, wherein the cancel mechanism includes an interfering mechanism between the first operation mechanism and the second operation mechanism. 10. The seat apparatus in a vehicle according to claim 8, wherein the first operation mechanism includes a first handle connected to a first rod, and the second operation mechanism includes a second handle connected to a second rod for releasing the seat slide mechanism from the front side of the seat portion and a third handle for releasing the seat slide mechanism from the rear side of the seat portion, the cancel mechanism including an arm portion extending from the first rod and a contacting portion extending from the second rod, the arm portion and the contacting portion being adapted to engage one another. 11. The seat apparatus in a vehicle according to claim 7, wherein the seat slide mechanism includes an upper rail slidably supported on a lower rail and an engaging plate rotatably supported on the upper rail, the second operation mechanism including a front handle connected to the engaging plate to rotate the engaging plate upon operation of the front handle and a rear handle connected to the engaging plate to rotate the engaging plate upon operation of the rear handle, the front handle being located at the front side of the seat portion and the rear handle being located at the rear side of the seat portion. 12. The seat apparatus in a vehicle according to claim 11, wherein the lock mechanism includes a rotatable latch adapted to engage the striker and a pawl which is engageable with the latch to prevent the latch from rotating, the pawl being provided with a release pin, the first operation mechanism including a lock handle connected to a rod and a release plate extending from the rod for engaging the release pin when the lock handle is rotated to move the pawl out of engagement with the latch and permit the latch to rotate. 13. The seat apparatus in a vehicle according to claim 7, wherein the lock mechanism includes a rotatable latch adapted