| 摘要 |
<p>PURPOSE:To improve the external pressure strength, and prevent the generation of wrinkles and twists on the inner face of a regenerated pipe by forming an unhardened resin layer of hardening resin on one face of the regenerating belt- like body of an existing pipe spirally wound in the existing pipe to form the regenerated pipe. CONSTITUTION:A belt-like body 1 is formed with a recess 7 on one face of a belt-like body main body 2 formed with a complementary coupling recess 3 and a coupling projection in the longitudinal direction on end edge sections, and an unhardened resin layer 5 of hardening resin is provided in it. Multiple T-shaped ribs 8 are formed on a face 9 on the opposite side to the face 6. The belt-like body 1 is spirally delivered. When the belt-like body 1 is rotated by one revolution, the coupling projection 4 of the top belt-like body 1 is coupled with the coupling recess 3 of the succeeding belt-like body 1 to form a spiral pipe. The spiral pipes are formed in sequence in an existing pipe, a drawing drum is drawn, the spiral pipe is expanded in diameter and closely stuck to the inner wall of the existing pipe, then the unhardened resin layer is hardened by the radiation of a ultraviolet lamp.</p> |
