COVER SYSTEM FOR ENVELOPE TUBES CASING Russian patent published in 2019 - IPC E03F7/04 

FIELD: sewage; water supply.

SUBSTANCE: group of inventions relates to the field of sewage devices. Cover system (1) comprises cover (6) configured to close with a tight fit of a cover opening made in a shell of the tubular shell, by applying said cover (6) to the cover seat belonging to the opening for the cover, and the rotary fastening device (2), located on cover (6) and configured to accommodate cover (6) on contact area (17) of housing (22) of tubular shell and possibility of fixing cover (6) on contact area with possibility of rotation around this contact area. Cover system (1) additionally comprises locking system (3), located on cover (6) at distance from rotary-fastening device (2) and comprising rotary fixing lever (23) and closure system (24) functionally connected to locking lever for fixation and unlocking of cover (6) on tubular shell body. Fixing lever (23) is made with possibility of rotation between the fixation position and the unlocking position. Locking system (3) makes it possible to close with a tight fit a hole for the cover made in the shell of the tubular shell, while holding cover system (1) and its manipulation by means of only one fixing lever (23). Tubular shell comprises tubular shell body with cover opening and above described cover system (1).

EFFECT: higher reliability of cover system and reduced time for installation and maintenance.

15 cl, 10 dwg