TELESCOPIC MANHOLE Russian patent published in 2013 - IPC F16L45/00 

FIELD: machine building.

SUBSTANCE: telescopic manhole consists of pipeline flanges (1) that have blocks (2) and are connected by traverse bars (3) fixed in blocks parallel the pipeline. In flange (1) bores there is a cover (4) made in a form of pipeline section. The cover is equipped with movable flanges (5), pressure rings (6) and sealing rings (7). The edges of sealing rings are closed into shaped annular belts (8). When manhole is in closed position pipeline flanges and covers are closed by pairs of semi-ring (9), and cover - by locks (10). Pressure (6) and sealing (7) rings are mounted between flanges with possibility of their automatic tightening due to medium pressure inside the pipeline. Pipeline or one of its sides can be closed by plug (11) after opening the telescopic manhole. Manhole can contain subsidiary devices: filter (12), flow laminator (13), acoustic vibrations damper (14) and washer (15) for installation and instrument and controls (16).

EFFECT: reduction of zone and pipeline service labour input, reduction of noise and vibrations, convenience of I&C installation.

7 cl, 7 dwg