Automatic inner pipeline surface washing apparatus
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United States of America Patent
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-
Feb 23, 1993
Grant Date -
N/A
app pub date -
Sep 10, 1991
filing date -
Jun 21, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Each of the washing units A and B comprises an openable and closable pinch valve unit 4 branchwise connected to a pipeline C, an autofeeder unit 5 for controlling the feed for advance and retraction movement of a high pressure hose 6 having rotatable nozzle unit connected to the front end thereof, and a hose reel unit 7 for winding and unwinding the high pressure hose. During washing operation, the nozzle unit enters the pipeline C through the pinch valve unit 4 now opened to wash the inner surface of the pipeline. During nonwashing period, the nozzle unit is moved rearward and completely isolated from the pipeline by the pinch valve unit 4 now closed. Therefore, the washing units A and B are completely separated from the pipeline C during nonwashing period.
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