| 摘要 |
Buried pipeline equipment. The connection sleeve is characterised in that it comprises an annular collar 20 having an external diameter considerably larger than the external diameter of a cylindrical outlet tube and comprising, in one of its transverse faces: - a bearing shape 22 for a lower tubular element 23 forming a sheath; - at least one cylindrical casing 24 which can be deformed elastically in the radial direction, extending axially from the internal peripheral edge of the collar and defining, at the state of rest, a passage cross-section s which is less than the external circumference of a tubular element 25 for extending or raising the sheath. Application to standpipe tubes. <IMAGE>
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