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Pivoting Drum

› Special design ensures effective cleaning of CSO
basins and sewage equalization systems
› Pivoting Drum design ensures an immediate
and powerful flushing wave
› Operates without external energy
› No fresh water supply is needed
› Flushing with in-situ water eliminates additional
burden on sewage treatment plant
› Will flush even if only partially filled
› Can be easily adapted to existing structures
› Simple, cost-saving design of structures possible
› Heightening of structure walls is not required to accommodate equipment
› Flexible system can accommodate a variety of installation designs

Application

The Pivoting Drum pivoting drum is a sediment flushing system designed to remove settled debris from reservoir floors, as well as sewer inverts, using a single flush. Although similar to a tipping bucket in design, the Pivoting Drum pivoting drum differs in that it fills by using the insystem combined water. The system operates by releasing this water sending a flushing wave down the entire length of the flushway pushing the settled debris ahead of it. The Pivoting Drum does not require a fresh water supply and uses no external energy. Consequently, no additional burden is added to the treatment plant. This flexible system can be adapted to a wide range of basin designs and inlet and discharge conditions. This ensures optimal cleaning performance for any type of application. The compact design can significantly reduce costs especially when retrofitting into existing structures.

Operation

The Pivoting Drum pivoting drum consists of a watertight, eccentrically mounted, helical drum made of stainless steel. It is mounted on two self-aligning stainless-steel bearings with fiber-reinforced bushings. There are two options used for filling the drum with in-situ water.

The flushing process is initiated following a storm event. When the water level in the overflow storage basin empties, it triggers a float mechanism located in the sump which unlocks the Pivoting Drum causing it to pivot forward sending a torrent of water down the entire length of the flushway scouring all of the settled debris from the tank floor. If required, the flushing sequence can also be triggered electronically or hydraulically.

Type I: Self Filling When the stormwater overflow basin is empty, the Pivoting Drum housing is in the discharge position with the opening facing downward towards the floor. When a storm event occurs and the water level in the overflow basin begins to rise, the water enters the Pivoting Drum through the opening. As the drum begins to fill, it is rotated upward by two integral side floats. The flushing water is thus "bucketed" into the drum. As the drum fills it is latched in position.

Type II: Filled When the stormwater overflow basin is empty, the Pivoting Drum housing is in the filling position with the opening facing upward. The Pivoting Drum is locked in this position by means of a latch (which is contolled by a float mechanism). The flushing water is introduced into the drum through a pipe which may originate from a separate structure or chamber.

Operation Sample