| 摘要 |
<p>The present invention relates to a method and a system for impregnating a tubular liner (46) having a fibrous inner layer and a fluid-impermeable outer layer.
The method is carried out by means of a conveyor system (10) defining a conveying path monotonously descending from a fourth position via a third and a second position to a first position. At the first position, a resin injector (18) is located. Along the conveying path, one or more constrictions are provided for allowing the liner (46) to assume a flat configuration in which the fibrous inner layer of the liner is contacting an opposite part of the fibrous inner layer of the liner.
The liner (46) is positioned on the conveyor system (10), extending through the conveying path and the one or more constrictions (A,B,C,D). The liner (46) defines a supply zone extending inside the liner between the first position and the one or more constrictions and defines an impregnation zone extending inside the liner between the one or more constrictions and the fourth position. The supply zone is filled with resin by using the resin injector (18), and the resin is allowed to advance in the impregnation zone in a direction opposite the conveying direction of the liner and to reach a steady state position at the fourth position for subjecting the liner (46) to an elevated impregnation pressure between the second and third positions caused by the height difference between the first and second position and the third and fourth position.</p> |
