Scraper
AssigneeAsea Brown Boveri AG
InventorsMichael Hirth, Joachim Jochum, Christian Wieckert
Life of this patent
Estimating the term…
Abstract
An apparatus for the removal of residues from the inner wall of a tube carrying hot gases and/or vapors includes a passage extending into a first end of the tube in an axial direction; an axially extending shaft supported within the passage in an axially displaceable manner so that one end of the shaft is within the tube; a discharge opening in the tube through which the residues may be removed; a helically wound metal scraper connected to the one end of the shaft; and a device for driving the shaft such that the scraper is rotated in a manner of a corkscrew into the tube.
Claims14
A tube carrying hot gases and/or vapors, and including an apparatus for the removal of residues from the inner wall of said tube, comprising:
- a passage extending into a first end of said tube in an axial direction;
- an axially extending shaft supported within said passage in an axially displaceable manner so that one end of said shaft is within said tube;
- a discharge opening in said tube through which the residues may be removed;
- a helically wound metal scraper connected to said one end of said shaft;
- and means for driving said shaft such that said scraper is rotated in a corkscrew manner into said tube.
A tube carrying hot gases and/or vapors, and including an apparatus for the removal of residues from the inner wall of said tube, comprising:
- a passage extending into a first end of said tube in an axial direction;
- an axially extending shaft supported within said passage in an axially displaceable manner so that one end of said shaft is within said tube;
- a discharge opening in said tube through which the residues may be removed;
- a helically wound metal scraper connected to said one end of said shaft;
- means for driving said shaft such that said scraper is rotated in a corkscrew manner into said tube;
- and
- a cavity at an end of said tube opposite said first end of said tube, whereby when said scraper and said shaft are in a rest position, said scraper fits within said cavity so that it is not exposed to the hot gases and/or vapors within said tube.
A tube carrying hot gases and/or vapors, and including an apparatus for the removal of residues from the inner wall of said tube, comprising:
- a passage extending into a first end of said tube in an axial direction;
- an axially extending shaft supported within said passage in an axially displaceable manner so that one end of said shaft is within said tube;
- a discharge opening in said tube through which the residues may be removed;
- a helically wound metal scraper connected to said one end of said shaft;
- means for driving said shaft such that said scraper is rotated in a corkscrew manner into said tube;
- and
- a second discharge opening in said tube offset in said axial direction.
Dependencies are inferred from the claim text.