| 摘要 |
<p>A spool, to be inserted between two pipeline sections, is oriented so that the corresponding points on the muting spool and pipe ends define parallel lines, and such that an imaginary line segment may be extended from the center of each pipeline section end to the center of the corresponding spool end to which it is to be joined without intersecting the wall of the pipelines or the spool. Guides are then affixed to the pipeline ends and to the spool ends, which guides define planes parallel to the line of intersection between the planes of the pipeline ends (and the planes of the spool ends which are oriented identically) and to the line segments between the centers of the pipeline end and the corresponding end of the spool. The guides are arranged to extend beyond the perimeter of the pipeline ends and the spool ends in order that the guides will engage each other before the mating spool and pipeline ends have an opportunity to come in contact. The guides on the pipeline ends are then engaged with the guides on the corresponding ends of the spool and the spool is moved into position with the guides in engagement along a line parallel to the plane of the guides.</p> |
