Rapper device
AssigneeShell Oil Company
InventorsAlfons Heitmann, Thomas Paul Von Kossak-Glowczewski
Life of this patent
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Abstract
A method and a rapper device for cleaning a heat exchange surface in a pressure vessel. The rapper device includes a striker rod which has one end contacting the heat exchange surface in the pressure vessel and one end projecting out of the pressure vessel via a passage opening. The rapper device also includes an impacting device for impacting the projecting end of the striker rod. A section of the striker rod is slideably supported in a pressure chamber adjacent the passage opening. The pressure chamber is connected to a sealing gas supply maintaining the pressure in the pressure chamber at a higher level than the pressure in the pressure vessel. A bellows defines a pressure chamber around at least a section of the striker rod.
Claims8
A rapper device for cleaning a heat exchange surface in a pressure vessel by transmitting impact energy, the rapper device comprising:
- a striker rod which has a head contacting the heat exchange surface in the pressure vessel and one end projecting out of the pressure vessel via a passage opening;
- and
- an impacting device for impacting the striker rod;
- wherein a bellows defines a pressure chamber around at least a section of the striker rod, the pressure chamber having a gastight connection to a wall section surrounding the passage opening.
Dependencies are inferred from the claim text.