Double wall system for e.g. tank, has case whose ends are locked by closure elements in assembly state such that cavity formed between interior wall and exterior wall is closed, and are opened in operating mode such that cavity is opened

摘要

The system (1) has an interior wall (2) and an exterior wall (3) provided such that a cavity (4) is formed between the interior wall and the exterior wall. Two ends (5, 6) of a case (7) are locked by closure elements (11, 12) in an assembly state such that the cavity is closed, and are opened in an operating mode such that the cavity is opened. A spacer (10) is arranged between the interior wall and the exterior wall and provided with spacing elements (10a, 10b). The case is provided with an internal thread (18).