Rapper device
AssigneeShell Oil Company
InventorsAlfons Heitmann, Uwe Herwig, Thomas Paul Von Kossak-Glowczewski
Life of this patent
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Abstract
A rapper device for cleaning a heat exchange surface in a pressure vessel by transmitting impact energy. The rapper device includes a striker and an impacting device for impacting the striker which has one end contacting the heat exchange surface in the pressure vessel. The striker includes a piston section having a piston rod projecting out of the pressure vessel via a passage opening in line with the impacting device. A piston head is slideable within a piston chamber in line with the passage opening. The piston chamber is operatively connected to a sealing gas supply. The piston head is a separate part with an aperture. The piston rod runs through the aperture, e.g., in a slideable arrangement.
Claims13
A rapper device for cleaning a heat exchange surface in a pressure vessel by transmitting impact energy, the rapper device comprising:
- an impacting device for impacting a striker;
- and
- the striker;
- wherein the striker comprises
- an outer end contacting the heat exchange surface in the pressure vessel, and
- a piston section comprising
- a piston rod projecting out of the pressure vessel via a passage opening in line with the impacting device, and
- a piston head slideable within a piston chamber in line with the passage opening, the piston chamber being operatively connected to a sealing gas supply,
- wherein the piston head is a separate part from the piston rod,
- wherein the piston head has an aperture, and
- wherein the piston rod runs through the aperture.
Dependencies are inferred from the claim text.