ROTATABLE PROTECTIVE HERMETIC SHUTTER Russian patent published in 2018 - IPC E21F1/16 

FIELD: construction.

SUBSTANCE: invention relates to the construction and operation of subway tunnels, more specifically to the rotatable protective-hermetic shutter Said technical result is achieved by the fact that the shutter is rotatable protective-hermetic, comprising a protective web, a rotation mechanism and a sealing mechanism consisting of an electric motor, a transfer case connected to the pushers, wedge clamps, brackets fixed to the opening of the opening, and a linkage mechanism comprising a pull rod connected to the pusher provided with a head, on which the levers connected to the wedge clamp are hinged. In this case, the shutter is provided with a mechanism for estimating and measuring the amount of compression of the seal, which is made in the form of an index and a measuring scale with divisions denoting the compression value of the seal, while the pointer is attached to the linkage linkage head, and a graduated scale indicating the amount of compression of the seal is attached to the surface of the protective web on the side parallel to the pull rod.

EFFECT: invention is aimed at providing and improving the conditions for evaluating and monitoring the compression amount of the seal during the sealing process and the compression amount of the seal in the operating position.

1 cl, 5 dwg