| 摘要 |
<p>2-way valve for fluid distribution pig pipe-line, comprising a plunger tube (2; 2' + 30; 2" + 30") in which is engaged an abutment part (3, 3', 3") adapted to receive a scraper (4) in abutment, an annular slot (6, 6', 6") formed through this plunger tube upstream of this abutment part and an obturating sliding sleeve (7, 7', 7"), movable longitudinally under the action of a control device (15, 16; 37, 38; 38") between a closed configuration in which the sleeve obturates the annular slot and an open configuration in which the sleeve leaves the annular slot at least partly clear, characterised in that the abutment part (3, 3', 3") is movable and is integral with the said sleeve, a feed pressure injection orifice (18, 18', 18") opening into this abutment part. …<IMAGE>… </p> |
