Vacuum extraction container for drain channel slurry - has intermediary wall with expandable pressure ring located between seals mounted in front and rear holders

摘要

The intermediary wall (18) can be steplessly adjusted and fixed in place relative to the inner wall (20) of the container (10). The intermediary wall has a tubular extension (19) with on its front and rear ends a holder for a ring seal (22) which seals against the inner wall. An expandable ring (25) pressed against the inner wall is located between the two seals (22) and comprises a row of parallel strips arranged in the longitudinal direction of the container (10). The ring is forced against the wall by an inflatable body (27).