Sealing device and method

摘要

The present disclosure relates to a sealing device 20 for a control rod 17, passing through an aperture 15c in a wall 15, wherein the control rod 17 is connected between an actuator 13, placed on one side of the wall, and a controlled entity 9a, placed on the other side of the wall, such that the actuator can control the controlled entity with motion of the control rod. The sealing device 20 includes a packing box 37 through which the control rod 17 passes and a seal 41 which provides a sealing function between the control rod 17 and the packing box 37. The packing box 37 is moveable with the control rod 17 in relation to the wall 15. Wall aperture 15c is sized to allow movement of the control rod 17 within aperture 15c. A flexible member 39 surrounds a portion of control rod 17 and extends between the packing box 37 and the wall 15, in a gastight communication with each. As such, the subject sealing device allows movement of the control rod without compromising the sealing function efficiency thereof.

主权项

1. A sealing device for a control rod passing through an aperture in a wall comprising:
the control rod attached between an actuator placed on one side of the wall and a controlled entity placed on the other side of the wall, such that the actuator can control the controlled entity with motion of the control rod, a packing box gas tightly sealed to the control rod with a seal, with the packing box and control rod moveable in relation to the wall; and a flexible member integral to the packing box gas tightly secured to the wall, wherein a play is provided between the aperture in the wall and the control rod, and the packing box includes an opening housing a firm gastight seal between the packing box and the control rod, the gastight seal having at least one sealing ring that provides a seal around the control rod.