FIELD: construction.
SUBSTANCE: device for sewage drains blocking comprises a plug with a mechanism interacting with a drive. The plug is a cylindrical surface fragment. The inner surface of the plug has a fixed stiffness amplifier represented by a strip of spring metal with fixing elements at its ends. The mechanism of interaction with the drive is mounted on the stiffness amplifier. The plug may comprise vertically oriented slots conventionally dividing it into several parts. The plug can be made of several modular elements. Plug elements can have hinged connections.
EFFECT: expansion of the device scope, increased operating life, reduced possibility of damage or unauthorized removal by concerned persons.
4 cl, 3 dwg
