Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1998-10-08
2000-06-06
Bryant, David P.
Metal working
Method of mechanical manufacture
Assembling or joining
2952501, 29819, 414918, 174 45R, B23P 1100
Patent
active
060703164
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a method for fitting an optical cable to a cable of an overhead line having a sequence of line pylons, a lashing apparatus being provided which runs along the cable of the overhead line.
A framework which can be fitted to a pylon and has two cantilever arms was disclosed in an article by Carter et al, "The Development of Wrap-on Optical Cables for Use on the Earthwires of High Voltage Power Lines", International Conference on Large High Voltage Electric Systems, 1988, pages 1-6. As is evident in particular from FIG. 7 of the article, the lashing machine is raised off the high-tension overhead line cable by means of a rope or cable and is pivoted around above the pylon by means of the vertical framework, which can rotate. The lashing machine is then placed on the high-tension overhead line cable once again on the other side of the pylon. Such bypassing is complicated and involves an appropriately strong framework and cantilever arms.
FIG. 5 of DE-A1 32 28 239 discloses a lashing apparatus for an optical cable, which is moved along a line cable of an overhead line. When this lashing apparatus arrives at an overhead line pylon, the supply coil is removed from the lashing apparatus and is passed around behind the pylon to a second lashing apparatus. However, passing the cable drum or the entire lashing apparatus around the pylon is highly time-consuming and requires appropriate transport devices (for example lifting platforms, mounting brackets or the like) by means of which the action of passing the apparatus around the pylon, can be carried out.
SUMMARY OF THE INVENTION
The invention is based on the object of indicating a way in which a lashing apparatus can be transferred from one side of the pylon to the other in an easier manner.
According to the invention, this object is achieved in the case of a method of the type mentioned initially in that two ends of the pylon bypass, which is formed in the shape of an arc, are fitted to the respective cable, in that the lashing apparatus is diverted from the respective cable in the region of the pylon and is passed around said pylon, by means of the pylon bypass, in the shape of an arc.
The pylon bypass, which is designed in the shape of an arc, is considerably lighter than the overall lashing apparatus or even a cable drum, and it can be handled more easily, can be fitted and removed more easily, and allows the lashing apparatus to be passed on particularly safely and reliably from one side of the pylon to the other.
The invention also relates to a device for bypassing a lashing apparatus for an optical cable, which apparatus is passed along a cable of an overhead line and which is characterized in that a pylon bypass which is formed in the shape of an arc is provided in such a manner that one of its ends rests on the incoming cable, and its other end rests on the outgoing cable, and in that the pylon bypass has a guide for passing on the lashing apparatus.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic illustration of an overhead line with a lashing apparatus and a schematically illustrated pylon bypass according to the invention,
FIG. 2 is a side view of a pylon bypass according to the invention,
FIG. 3 is an end view of the pylon device according to FIG. 2, in a position rotated through 90.degree..
FIG. 4 is a side view of a pylon bypass, which is arranged essentially above a cable, as a further exemplary embodiment of the invention,
FIG. 5 is an end view of the pylon bypass according to FIG. 4, seen essentially in the longitudinal direction of the cable,
FIG. 6 is a view taken in the longitudinal direction of the cable of a high-tension pylon with cross arms and various refinements of pylon bypasses according to the invention,
FIG. 7 is a side view of the high-tension pylons according to FIG. 6,
FIG. 8 is a view of a vehicle for passing pylon bypasses around pylons,
FIG. 9 is a detailed end view of a lashing apparatus in the region of the pylon bypass,
FIGS. 10 and 11 are schematic views of tw
REFERENCES:
C. N. Carter et al, The Development of Wrap-On Optical Cables for Use on the Earthwires of High Voltage Power Lines, International Conference on Large High Voltage Electric Systems, 1988, pp. 1-6.
Abstract for Japanese 60162203, Patents Abstracts of Japan.
Abstract for Japanese 02156207, Patent Abstracts of Japan.
Einsle Gunter
Kreutz Dieter
Bryant David P.
Siemens Aktiengesellschaft
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