| 摘要 |
A method for providing a seal between two pipes of the type in which one circumferential end portion of one pipe has an enlargement to provide an internal circumferential channel into which the unenlarged end of the other pipe can be telescoped, the space between the interior of this channel and the exterior of the inner pipe end containing an annular seal ring of the type having a K cross-section in which the oblique arms of the K constitute sealing lips facing radially and obliquely inwardly of the channel, one canted axially inwardly and the other canted axially outwardly of the channel. An axially-slotted elastomeric cylinder is compressed and inserted between the two adjacent ends of the pipes as they are moved to this telescoped position, to hold the axially-outwardly canted lip bent radially outward to a diameter greater than the outer diameter of the inner pipe while the inner pipe is being inserted; the cylinder is then released by withdrawing it, to permit the axially-outwardly canted lip to spring back into its desired sealing position. This procedure avoids damage otherwise likely to occur to the latter lip during insertion.
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