Sector Defense

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Schematic representation of the sector weir

The sector weir is one of the movable weirs with overflow lock. A sector weir consists of a round weir that is connected to the back of the drain. This closure is rotatably mounted on the underwater side and through a valve-controlled connection of the sector chamber (also called ballast chamber) with the upper water, the closure body is raised as a result of the chamber pressure. In the case of sector weirs, the closure body is usually controlled completely hydraulically, i.e. by simply opening or closing the valves. The sector weir, which developed from the double flap weir (bear drop weir), differs from the segment weir in that it has a hollow body and, compared to the segment weir, has at least two closed walls. Furthermore, the segment weir is usually underflowed, but overflowed over the sector weir.

A sector weir is particularly suitable for medium water levels and very large water levels. A sector weir requires a particularly complex weir substructure and complex controls, but it blends in well with the landscape, as there are no superstructures or visible drives.

The functioning and construction of the sector weir is very similar to the drum weir, which was widely used in America at the beginning of the 19th century . The difference between drum weir and sector weir is that the triangular float in the sector weir is pivoted on the underwater side and the drum weir is pivoted on the upstream side.

literature

  • Kurt Lecher; Hans-Peter Lühr; Ulrich CE Zanke: Pocket book of water management , Vieweg + Teubner; Edition: 8th, 2001, ISBN 3528025808
  • Theodor Strobl, Franz Zunic: Handbuch Wasserbau , Springer, 2006, ISBN 3-540-22300-2

Individual evidence

  1. ^ Gustav Markowitz: Automatic damming devices , Franckh'sche Verlagshandlung, Stuttgart. 1933.
  2. ↑ Kurt Lecher; Hans-Peter Lühr; Ulrich CE Zanke: Pocket book of water management , Vieweg + Teubner; Edition: 8th, 2001, p. 584
  3. ↑ This similarity has historically led to different translations. The English term “drum gate” is correctly translated as drum gate (drum weir) in the Zentralblatt der Bauverwaltung , 1926, p. 122, in other works (magazine: Wasserwirtschaft, Vienna, 1926, p. 437) with sector weir.