Apparatus for laying underground electric cables
First Claim
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1. An apparatus for laying at least an underground electric cable, comprising:
- a vehicle longitudinally movable over a trench arranged to receive at least one electric cable;
a first deposition unit to form a base layer of inert material at the bottom of said trench, said first deposition unit comprising at least a first conveying duct connected at the upper part thereof with feed means for said inert material and at the lower part thereof with a downwardly-turned first discharge opening;
at least one guide structure, having an inlet end portion turned towards the vehicle front, to engage at least one stretch of said cable, and an outlet end portion disposed at a lower position and turned to the back of the first deposition unit for laying the cable on said base layer, said guide structure having at least one central portion laterally disposed relative to said first conveying duct; and
a second deposition unit operating at the rear of the guide structure to form a covering layer of inert material upon the base layer and the cable.
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Abstract
An apparatus for laying underground electric cables, in particular for high-voltage lines, having a vehicle towable along a trench and carrying, on a first van, a first deposition unit adapted to form a base layer of inert material for heat dissipation at the trench bottom. Mounted on the first van is a guide structure engaging the cable for laying it on the base layer previously compacted by a vibrating plate. A second van carries a second deposition unit forming a covering layer of inert material upon the previously laid-down base layer and cable.
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Citations
14 Claims
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1. An apparatus for laying at least an underground electric cable, comprising:
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a vehicle longitudinally movable over a trench arranged to receive at least one electric cable;
a first deposition unit to form a base layer of inert material at the bottom of said trench, said first deposition unit comprising at least a first conveying duct connected at the upper part thereof with feed means for said inert material and at the lower part thereof with a downwardly-turned first discharge opening;
at least one guide structure, having an inlet end portion turned towards the vehicle front, to engage at least one stretch of said cable, and an outlet end portion disposed at a lower position and turned to the back of the first deposition unit for laying the cable on said base layer, said guide structure having at least one central portion laterally disposed relative to said first conveying duct; and
a second deposition unit operating at the rear of the guide structure to form a covering layer of inert material upon the base layer and the cable. - View Dependent Claims (2, 7, 8, 9, 10, 11, 12, 13, 14)
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- 3. An apparatus as claimed in claim 3, wherein said compacting unit comprises a vibrating plate acting the base layer by a lower surface thereof having a substantially V-shaped cross-section outline.
Specification