| 摘要 |
A device for permanent joining of tubes (1, 2) made of flexible material, such as polyethylene, and specially intended for use as covering or lining tubes when drilling holes in the ground, particularly soil or moraine, the device including a female portion (3) on a first tube (1) and a male portion (10) interacting therewith on a second tube (2), the male portion being provided with an annular projection (11) round its outer circumference, which projection under radial deformation thereof and/or of an annular projection (4) on the inner circumference of the female portion is arranged to pass this and to be inserted in an annular recess (5) on the inner circumference of the female portion. Round its outer circumference, the male portion is provided with a plurality of annular, axially spaced projections (11a-1). The female portion is provided with a plurality of annular recesses (5a-1) round its inner circumference, which recesses are axially spaced at a distance corresponding to the distance between the projections of the male portion and in which, in the joining position, the projections of the male portion an inserted.
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