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1. WO2020114959 - METHOD FOR THE APPLICATION OF A TUBULAR HULL TO AN ELECTRIC CABLE

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[ EN ]

CLAIMS

1. A method for the application of a tubular hull (120) to an electric cable (100), the tubular hull (120) comprising a plurality of ring-shaped elements (102) and/or of tube-shaped elements (101), wherein the plurality of ring-shaped elements (102) and/or of tube-shaped elements (101) are arranged one behind the other along the longitudinal direction of the electric cable (100), and wherein the method comprises at least the following steps in consecutive order:

a.) pre-arranging a part of the tubular hull (120) by means of a tubular hull application unit (200);

b.) applying the pre-arranged part of the tubular hull (120) to the electric cable (100) by means of inserting the electric cable (100) into the tubular hull application unit (200) and into the pre-arranged part of the tubular hull (120);

c.) removing the electric cable (100) from the tubular hull application unit (200); and

x.) repeating steps a.), b.) and c.) at least two times and in consecutive order.

2. The method according to claim 1, wherein in step x.), steps a.), b.) and c.) are repeated until the tubular hull (120) covers most of the overall longitudinal extension of the electric cable (100), in particular until the tubular hull (120) covers essentially the entire overall longitudinal extension of the electric cable (100).

3. The method according to claim 1 or 2, wherein in step b.) and before step x.), the prearranged part of the tubular hull (120) is applied approximately to the middle of the electric cable (100).

4. The method according to one of the preceding claims, wherein in the first repetition of step b.) in step x.), preferably in each odd-numbered repetition of step b.) in step x.), the electric cable (100) is inserted into the pre-arranged part of the tubular hull (120) along a first longitudinal direction of the electric cable (100), wherein in the second repetition of step b.) in step x.), preferably in each even-numbered repetition of step b.) in step x.), the electric cable (100) is inserted into the pre-arranged part of the tubular hull (120) along a second longitudinal direction of the electric cable (100), and wherein the second longitudinal direction of the electric cable (100) extends oppositely to the first longitudinal direction of the electric cable (100).

5. The method according to one of the preceding claims, wherein in each repetition of step b.) in step x.), the pre-arranged part of the tubular hull (120) is applied such to the electric cable (100), that the pre-arranged part of the tubular hull (120) is placed directly adjacent to a part of the tubular hull ( 120) that has already been applied to the electric cable (100) in a previous step b.).

6. The method according to one of the preceding claims, wherein the tubular hull (120) has an inner diameter and the electric cable (100) has an outer diameter, and wherein the outer diameter of the electric cable (100) is larger than the inner diameter of the tubular hull ( 120) in a state before the application of the tubular hull (120) to the electric cable (100).

7. The method according to one of the preceding claims, wherein the tubular hull application unit (200) comprises a plurality of tubular hull application subunits (201), wherein each part of the tubular hull ( 120) that is pre-arranged in step a.) and applied to the electric cable (100) in step b.) comprises a plurality of subparts which are applied to the electric cable ( 100) distantly from each other, and preferably simultaneously, by means of the tubular hull application subunits (201), and wherein preferably one or several intermediate conveying devices (400) are used for conveying the electric cable (100) between the tubular hull application subunits (201).

8. The method according to claim 7, wherein the subparts are first applied distantly from each other to the electric cable ( 100) and are then moved towards each other, in order to be arranged directly adjacent to each other.

9. The method according to one of the preceding claims, wherein in step b.), the insertion of the electric cable (100) into the pre-arranged part of the tubular hull (120) is carried out in a spooling/unspooling process by means of drums (20).

10. The method according to claim 9, wherein at least one pull-in rod (210) is used, in order to attach the electric cable (100) to one of the drums (20), and wherein preferably at least one drum connection rope (212) is used, in order to attach the pull-in rod (210) to one of the drums (20).

1 1 The method according to claim 9 or 10, wherein the drums (20) are linearly moved during

the spool ing/unspooling process, in order to not deflect the electric cable (100) in the region between the drums (20), and/or wherein each of the drums (20) has a spooling axis around which the drum (20) rotates for the spooling/unspooling process and each of the drums (20) is rotated during the spooling/unspooling process about an axis perpendicular to the spooling axis, in order to not deflect the electric cable (100) in the region between the drums (20).

12. The method according to one of the preceding claims, wherein in step b.), the electric cable ( 100) and/or a pull-in rod (210) to which the electric cable (100) is attached is inserted into the part of the tubular hull (120) by means of air pressure.

13. The method according to one of the preceding claims, wherein, in step a.), one or several of the ring-shaped elements ( 102) and/or one or several of the tube-shaped elements (101) are pre-arranged by means of at least one rotating wheel (242, 262) having one or several seats for receiving one of the ring-shaped elements (102) and/or one of the tube-shaped elements ( 101 ), and wherein, during the insertion of the electric cable (100) in step b.), the ring-shaped element ( 102) and/or the tube-shaped element (101) is preferably held in place on the rotating wheel (242, 262) by means of underpressure.

14. The method according to claim 12 or 13, wherein a plurality of rotating wheels (242, 262) are provided for the pre-arrangement of ring-shaped elements (102) and/or of tube-shaped elements ( 101 ) in step a.), and wherein this plurality of rotating wheels (242, 262) is driven by a common drive (245, 265).

15. A tubular hull application device (1 , ) adapted to apply a tubular hull (120) to an electric cable (100) according to the method as claimed in one of the preceding claims and comprising at least one tubular hull application unit (200, 200’) for pre-arranging a part of the tubular hull (120) as well as drums (20) for moving the electric cable (100) in and out of the pre-arranged part of the tubular hull (120).