Pipe with variable cross-section has control element forming wall section of pipe in variable cross-section region with outer seal to channel wall, control device for moving control element

摘要

The pipe has a control element (13), whereby the cross-section of the channel (12) formed by the pipe has a partially circular edge (26) near the control element. The control element forms a wall section of the pipe in the variable cross-section region with an outer seal (30) to the channel wall forming the circular edge along the flow direction and is rotatable about an axis through the centre point of the circular edge. The control element has an inner seal to the channel wall near the rotation axis along the flow direction, an aperture stop on at least one end that covers the vol. (23) divided off by the control element and a control device (17) for moving the control element.