| 摘要 |
PCT No. PCT/GB91/01412 Sec. 371 Date Apr. 6, 1992 Sec. 102(e) Date Apr. 6, 1992 PCT Filed Aug. 20, 1991 PCT Pub. No. WO92/03680 PCT Pub. Date Mar. 5, 1992.The method and apparatus are useful in positioning components, for example two half shells of a clamp for a pipeline or other cylindrical member (10). One half-shell (12) is clamped by studs (56) to brackets (52) on a carriage (16) which can then traverse about the member (10) by engagement of sprockets (30, 28) with chains (18) encircling the member (10). A second half-shell is then lowered by crane onto the member (10). The two half shells are clamped together by studs and the brackets (52) released and swung clear. The apparatus can then be removed if desired. Drive to the carriage (16) is through a flexible shaft (70), gearbox (34) and sprockets (30) connected together by drive shaft (33). Wheels (26) roll on the member (10). |
