| 摘要 |
For the in situ repair of drains and pipelines where damage or defects (6) have occurred in close proximity to incoming lateral drain or pipe connections (4), a tubular ejector body (10) is drawn or pushed into the drain or pipeline (2) to such a position that it extends to either side of the lateral connection (4). A pair of inflation sealing units (30, 32) at either end of the ejector body (10) are inflated to seal the body on either side of the lateral connection (4) and a further inflation unit (40) is inflated to close off the lateral side connection (4). Then a sealing composition is pumped out of the body (10) through a plurality of ejector openings (140) to form, when set, a seal repair of the drain or pipeline (2), without a blocking of the junction with the lateral drain or pipe connection (4). |
