Rapper device
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United States of America Patent
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Jan 7, 2014
Issued Date -
N/A
app pub date -
Dec 1, 2009
filing date -
Dec 2, 2008
priority date (Note) -
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status (Latency Note)
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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.
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