| 摘要 |
Insulated pipes comprising an inner pipe (13), an outer pipe (11) and an intermediate insulation (14) are manufactured by means of a plant consisting of a frame (10) which has a holder (15) for the outer pipe (11), a channel of circular section opposite said holder (15), and between said holder (15) and said channel a concial ring (16) tapering towards said holder (15). The outer pipe (11) is non-displaceably secured by means of said holder (15), and a shaping device (12) is placed in the channel, whereby an upwardly open U-shape is imparted to said shaping device (17). The insulation (14) is placed in said shaping device (12) and is also given the shape of a U. When the inner pipe (13) has been placed in the insulation (14), the shaping device (12) is drawn into the outer pipe (11) via the conical ring (16), whereby a circular shape is imparted to the shaping device (12) and the insulation (14) which are closed about the inner pipe (13). When the shaping device (12), the insulation (14) and the inner pipe (13) are in position in the outer pipe (11), the shaping device (12) is withdrawn, the insulation (14) and the inner pipe (13) being retained by means of an abutment. |
