| 摘要 |
An assembly (1) is disclosed for air-assisted insertion of a draw line (6a) inside and along a conduit (2) from an entry end of said conduit to an exit end. The assembly comprising a source of pressurised air (8); an apparatus (4) for sealing an end (16) of said conduit (2) through or about said sealing apparatus (4), a through passage in or in said sealing apparatus which receives a draw line (6a) such that when said sealing apparatus (4) engages the entry end (16) of said conduit, the draw line is capable of entering the apparatus (4) inside the conduit, a shuttle (6, 23) connected to a leading end of the draw line (6a) responsive to delivery of air from said pressurise air source (8) and which urges the draw line (6a) along the conduit (2) until it exits the conduit (2) via said exit end.
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