Power cable assembly device and a power cable provided with such a device
View Patent ↗A power cable assembly device adapted to be arranged in the spaces between neighboring power cores of a power cable, includes an extruded profiled body made of a polymer material and adapted to the cross-sectional shape and elongation of the power cable, the profiled body including a chamber and defining a slit to the chamber, the chamber being adapted to receive a fiber optic cable via the slit. Substantially the whole surface of the profiled body inside the chamber, the surface of the profiled body defining the slit, and the surface of at least a region outside the profiled body extending from the slit and away from the slit is provided with a layer of semi-conductive material.
1. A power cable assembly device adapted to be arranged in the spaces between neighbouring power cores of a power cable, comprising:
an extruded profiled body made of a polymer material and adapted to the cross-sectional shape and elongation of the power cable, said profiled body comprising a chamber and defining a slit to said chamber, said chamber being adapted to receive a fibre optic cable via said slit,
wherein substantially the whole surface of the profiled body inside the chamber, the surface of the profiled body defining the slit, and the surface of at least a region outside the profiled body extending from the slit and away from the slit is provided with a layer of semi-conductive material.
2. The power cable assembly device according to claim 1 , wherein:
the cross-section of the profiled body includes a first wall, a second wall and a third wall,
said first wall being convex and having first and second opposite end portions,
said second wall being concave and having third and fourth opposite end portions,
said third wall being concave and having fifth and sixth end portions,
the third end portion of said second wall being connected to said first end portion of said first wall,
the fifth end portion of said third wall being connected to said second end portion of the first wall,
the first wall being adapted to face a jacket of the power cable,
said second wall and said third wall being adapted to face a pair of neighbouring power cores, and
the fourth end portion of the second wall and the sixth end portion of the third wall define together a slit to a chamber inside said profiled body, said slit extending in the elongation of the profile for allowing introduction of a fibre optic cable into said chamber.
3. The power cable assembly device according to claim 1 , wherein the cross-section of the chamber is substantially circular.
4. The power cable assembly device according to claim 1 , wherein the semi-conductive material of the layer comprises a mixture of a polymer material and an additive.
5. The power cable assembly device according to claim 4 , wherein the polymer material of the profiled body and the polymer material of the semi-conductive layer is chosen from PVC and PE.
6. The power cable assembly device according to claim 1 , wherein the thickness of said layer is in the range 0.01-0.5 mm.
7. The power cable assembly device according to claim 1 , wherein said elongated slit is closed in an assembled state.
8. The power cable assembly device according to claim 6 , wherein the diameter of the chamber is in the range 11-25 mm.
9. The power cable assembly device according to claim 2 , wherein the distance between the fourth end portion of the second wall and the sixth end portion of the third wall defining the slit is in the range 1 mm-13 mm.
10. The power cable assembly device according to claim 1 , wherein the diameter of the chamber is in the range 11-25 mm.
11. The power cable assembly device according to claim 2 , wherein the wall thickness of either or all of the second wall, the third wall and a wall defining the chamber has a thickness in the range of 2-6 mm.
12. The power cable assembly device according to claim 2 , wherein the concavity of the outer surface of the second wall and the third wall, respectively, is adapted to the number of power cores and the diameter of the power cores.
13. The power cable assembly device according to claim 2 , wherein the convexity of the outer surface of the first wall is adapted to an imaginary circle between a peripheral point of each power core in relation to the diametrical centre point of the power cable.
14. A power cable comprising a plurality of power cable assembly devices according to claim 1 , said power cable assembly devices being arranged in the spaces between neighbouring power cores, at least one of said power cable assembly devices containing a fibre optic cable introduced via said slit.
15. The power cable according to claim 14 , wherein:
the cross-section of the profiled body includes a first wall, a second wall and a third wall,
the first wall faces a jacket of the power cable,
the second wall and the third wall face a pair of neighbouring power cores, and
at least one of said assembly devices containing said fibre optic cable.
16. The power cable according to claim 15 , wherein the second wall and the third wall are concave, and the concavity of the second wall and the third wall, respectively, is adapted to the number of power cores and the diameter of the power cores.
17. The power cable according to claim 15 , wherein the first wall is convex, and the convexity of the first wall is adapted to an imaginary circle between a peripheral point of each power core in relation to the diametrical centre point of the power cable.
18. The power cable according to claim 14 , wherein the number of power cores is three and the number of power cable assembly devices is three, and wherein the diameter of each power core is in the range 40-140 mm.
19. The power cable assembly device according to claim 2 , wherein the cross-section of the chamber is substantially circular.
20. The power cable assembly device according to claim 2 , wherein the semi-conductive material of the layer comprises a mixture of a polymer material and an additive.