摘要 |
<p>To convey fluid media, wing pistons (2, 6, 21) arranged in a conveyor pipeline (1) of rectangular cross-section are mounted so as to pivot about a swivelling axis (5, 9, 24) on a pipeline wall (17) perpendicular to the direction of flow. Nonreturn valves (3, 7, 22) in the form of valve flaps (3, 7, 22) are arranged one behind the other in the direction of flow (A) and are hinged to the wing pistons (2, 6, 21) parallel to their swivelling axes (5, 9, 24). The length of a wing piston (2, 6, 21) is less than the width of the contiguous side walls (19) of the conveyor pipeline (1) and the remaining gap is bridged by the valve flaps (3, 7, 22), whose length is substantially greater, so that sealing contact along the opposite side wall (18) is ensured in every position of the wing piston (2, 6, 21) during the working phase.</p> |