JP2007303683A5 - - Google Patents

Claims (5)

A blocking work cover that can be mounted in a state in which the outer peripheral surface side of the connecting flange portion fixedly connected by a fastener is sealed to the outer peripheral surface of the both connecting flange portions. The elastic sealing material that can be pressed from the outside in the direction, and a split ring that tightens the elastic sealing material from the outside in the radial direction to the outer peripheral surface side of both connecting flange portions , and the above-described fastening ring One of the plurality of tightening split wheels includes a thin partition valve that can be inserted and moved to a position where the pipe flow path is blocked through the gap between the two connecting flange portions generated by the loosening operation of the fastener. An in-pipe flow path blocking device provided with sliding guide means for slidingly guiding the partition plate valve to a flow path blocking position and a flow path opening position in a sealed state. Blocking that can be installed in a state where the outer periphery of both connecting flange portions is sealed against both pipe portions that are tightened and connected by a fastener with a sealing material interposed between the joint surfaces of both connecting flange portions. A thin partition valve that can be inserted into the work cover through the gap between the connecting flanges generated by the loosening operation of the fastener to the position where the flow path in the pipe is blocked, and the partition valve can be moved in a sealed state. Sliding guide means for slidingly guiding the path blocking position and the channel opening position is provided, and the blocking work cover includes a seal portion that is pressed against the outer peripheral surface of each connecting flange portion by an elastic force. An in- pipe flow path blocking device comprising: an elastic seal material; and a split ring having a split structure for tightening the elastic seal material from the radially outer side to the outer peripheral surface side of both connecting flange portions . The in-pipe flow path blocking device according to claim 1 or 2, wherein the elastic seal member and the tightening ring are formed with an opening that allows insertion movement of the partition plate valve . A second seal portion that is in contact with and adjacent to the outer peripheral surfaces of both connecting flange portions is integrally formed on the inner peripheral surface of the elastic sealing material, and the partition plate valve is allowed to be inserted into a part of the second seal portion. The in-pipe flow path blocking device according to claim 3, wherein an opening is formed . In order for the fastener to seal between the bolt provided on the contact surface of the head with the O-ring for sealing between the outer surface of one of the connecting flange portions and the outer surface of the other connecting flange portion. The in-pipe flow-path blocking device according to any one of claims 1 to 4, wherein the O-ring is formed from a cap nut provided on a contact surface .