MXPA96003044A

MXPA96003044A - Device for the union of two aer electrical cables

Info

Publication number: MXPA96003044A
Application number: MXPA/A/1996/003044A
Authority: MX
Inventors: Grajewski Franz; Stieb Werner; Wielgolaski Zbigniew; Jansen Ulrich; Buchwald Rudolf
Original assignee: Alcatel Kabel Ag&Ampco
Priority date: 1995-07-29
Filing date: 1996-07-26
Publication date: 1998-04-01

Abstract

A device for joining two aerial electric cables with light wave conducting elements disposed in a strung connection of electrical conductors and tensile resistant carrying elements, light conducting elements made of tubes containing optical fibers, is described. Means are provided for the mechanical and electrically conductive connection of the electrical conductor and the tensile carrying elements of each aerial cable as well as a sealed box for the reception of the junctions of the electrical fibers. The box [5] consists of two concentric tubes separated from each other [7.9], whose annular notch is sealed at both ends. The optical fibers are introduced into the annular notch through perforations [12] that exist in the sealing [8] on the end side. The connection junction as well as a reserve length of the optical fibers are placed in the annular recess, and the box [5] surrounds the means [21.3] for the mechanical and electrically conductive connection and is fixed on the means [3] or the cables aerial [

Description

DEVICE FOR THE UNION OF TWO AIR ELECTRICAL CABLES r-ESpRTPf-TON OK TA I NVENC-TON The invention relates to a device for joining two aerial electric cables according to the general idea of claim 1. It is known by the Patent DE 42 32 714 a sleeve for joining free conductor cables containing optical communication conduits. The sleeve consists of a wrapping tube, which at its ends has two front discs. A profile bar passes through the housing of the sleeve and protrudes dramatically outwards the friction discs of the sleeve casing. The adapter capsules of the cables are hermetically inserted into the openings of the front discs. Outside the sleeve box are attached the cable adapter caps that cover the free conductor cable, by means of jaws with the profile bar. The electrical connection of the ends of the free conductor cable is made through the first cable adapter capsule, the first jaw, the profile bar, the second jaw and the second cable adapter capsule. The connection of the data conductors is carried out in such a way that the data cable inserted inside the housing of the sleeve through the front discs in the area of the cable adapter caps REF: 22425 is discovered, the optical fibers they are spliced together and the spliced joints are left in splicing cartridges. One or more splice cartridges are fixed on the profile bar. In this sleeve it is disadvantageous that multiple alloys must be made. Thus, the introductions of the cable adapter caps as well as the profile bar, as well as the tube of the box on the front discs, must be sealed with respect to the front discs. Patent document EP 0 548 514 A1 discloses a connecting sleeve for light wave conductor phase cables, in which the electrical connection of the phase cables is made through cable clamps in the current paths connected to the cables. the free conductor cables. The protection tubes provided with optical fibers are introduced into the housing of a sleeve by means of cable screwing without strain and sealed. The sleeve box consists of two halves of each bell-shaped, which through a flange-shaped widening are screwed together. In the interior of the sleeve box, each half of the box has a bar whose ends are detachably connected to one another. The bar carries one or more junction cartridges, in which the splice junctions as well as the reserve lengths of the optical fibers are placed.

Also for the case of this sleeve the sealing of the space that receives the splice cartridge is complicated. It is common for both sleeves that due to the multiplicity of sealing points in case of a tensile stress, the sleeves may no longer be hermetic. Therefore, these sleeves are only suitable for use in areas without traction of a tension post. Another disadvantage is that spliced joints are placed in the splice cartridges. The present invention proposes the object of presenting a device for the connection of electrical overhead cables, which is easy to make and whose sealing is made in such a way that even under tensile loads there are no defects. In addition, the use of splice cartridges should be avoided. Starting from this, the device must be shaped in such a way that it is possible to place the device also between the posts. This object is achieved by means of the features set forth in claim 1. An essential advantage of the invention is that the connection reinforcements can be retaken, which in the displacement of cables belong to the current technique.

The invention makes it possible that during the installation no special considerations need to be taken and the device can be placed at any desired point of the entire cable layout. Other advantageous embodiments of the invention are pointed out in the claims that follow the first, as well as in the following description. The invention is described in more detail with the aid of the exemplary embodiments represented schematically in FIGS. 1 to 3. In FIG. 1, the right half of a sleeve for a ground wire conducting light waves 1 is shown. Such a ground usually consists of a core of a centrally placed steel wire, over which five other steel wires are strung, for example, as well as a thin steel tube 2 with at least one light wave conductor placed there. The stainless steel cable 2, a thin steel tube welded with a longitudinal seam with the same outer diameter as the steel wires, replaces in this construction one of the steel wires of the first row of wiring. In the case of steel wires, these are called "stalum" wires, that is, steel wires provided with an aluminum layer. In that row of steel wires are strung for example twelve aluminum wires. To join two of these ground wires, the row of aluminum wires is removed, the stainless steel pipe 2 is taken out of the row of steel wires and the other steel wires are cut out, so that the steel pipe is thin 2 with the light conductors that are there, protrudes beyond the end of the ground cable 1. The two cores consisting of steel wires of the ground cable 1 to be joined, are joined by means of a pressure connector or a spiral tensile armor not shown in Figure 1, and which are known in the wiring art. The row of aluminum wires is joined to an aluminum spiral 3, the individual bars of which extend between the ends of the rows of aluminum wire of the ground wire 1 parallel to the longitudinal ede of the ground wire 1. For full coverage an aluminum bar is missing, so that the thin steel tube 2 can be pulled outwards. For this purpose, a guide ring 4 has been introduced into the aluminum spiral 3, which has a longitudinal groove 4a of a determined length, in which the thin steel tube 2 is taken out. called splicing carrier 5 by means of two clamps 6. The splicing carrier 5 consists of an inner tube 7 which at both ends has a flange 8, as well as an outer tube 9 which sits on the flanges 8. The outer tube 9 it is movably mounted on the flanges 8, in such a way that the ring-shaped recess sealed by means of the inner tube 7, the outer tube 9 and the flange 8 can be accessible from the outside. The sealing between the outer tube 9 and the flange 8 takes place by means of a tension ring 10, which acts on a sealing ring 11. The flanges 8 have a longitudinal perforation 12, through which the light wave conduits that They can be inserted into the annular recess in the stainless steel tube 2. The stainless steel tube 2 is displaced with respect to the light wave conduits and tightly sealed by means of a tubular screwdriving 13,14 in the entrance area of the longitudinal perforation. On the upper surface of the inner tube 7 several furation teeth 15 have been fitted, in which the fiber junctions of the light wave conductor can be placed. Likewise on the upper surface of the inner tube 7, two distancing pins 16 corresponding to each connecting tooth 15 are fastened, around which the conductor reserves for light waves are wound. In addition to each connecting tooth 15 there is a so-called finger 17, which are fied on the upper surface of the inner tube 7. These fingers 17 have an area 17a, which between it and the upper surface of the inner tube 7 form a recess, in which is placed the turns of the reserves of light wave conductors, to stop them on the curved surface of the surface of the inner tube 7. The reserves of conductor of luminous waves are thus placed on a curved surface. The enpartement carrier 5 is surrounded by a protective shield 18, whose ends 18a are fixed by means of clamp clamps 19 on the ground cable 1 or the aluminum spiral 3. The protection box 19 may consist of two hollow halves , which are sealed on their contact surfaces running longitudinally. The protection element 18, however, may consist of at least two halves of each divided perpendicularly to the transverse direction of the cable to ground 1, which for example may be screwed together. The inner tube 7, the outer tube 9 as well as the protection tube 18 are all made of metal, more advantageously for the intended purpose, of stainless steel. The connecting teeth 15, the spacing pins 16 and the fingers 17 fixed to the surface of the inner tube 7 are advantageously welded to the surface or in corresponding holes in a tight manner with soft or hard solder. The recess that receives the junctions of the light wave conductor between the inner tube 7 and the outer tube 9 is hermetically sealed against moisture. Mechanical forces are absorbed in the broadest sense by pressure bonding or bonding spirals. The aluminum spiral 3 provides an electrically conductive junction for the aluminum wires. Figure 2 shows a cut in the middle of the sleeve. The "stalum" wires 20 are surrounded by the snap connection 21. On the snap connection 21 there are the bars of the aluminum spirals 3. The fiber stock (not shown) is fixed by means of the finger 17 and the spacing pins 16 on the curved surface of the inner tube 7. Figures 3a and 3b show the joining of the "stalum" wires 20 by means of the snap connection 21 as well as the bonding of the aluminum wires 22 by means of the spirals of aluminum 3 The stainless steel tubes 2 are led outwards by means of the webs formed by wires of "stalum" 20 and have a greater length, which is obtained by means of the corresponding shortening of the cable to ground 1. It is noted that in relation to this date, the method known by the applicant for carrying out said invention , is the conventional for the manufacture of the obdetos to which it refers. Having described the invention as above, property is claimed as contained in the following:

Claims

RTÜTVTNnTr.Af-.TONRR 1.- Device for joining two overhead electric cables, with assembly of wires of light wave conductive elements, made of tubes containing optical fibers dips posed by electrical conductors and tensile resistant carrier elements with means for the mechanical and electrically conductive joints of the electrical conductor and of the tensile carrying elements of each aerial cable as well as one each sealed to receive the spliced joints of the optical fibers, characterized in that the each consists of two tubes arranged concentrically at a certain distance between yes, whose annular notch on both ends is sealed, and the optical fibers are introduced into the annular notch through perforations in the sealing on the end sides and the junction as well as a reserve length of the optical fibers are placed in the annular notch, and the each surround means for the mechanical and electrical conductive joints and is fixed to the means or aerial cables. Device according to claim 1, characterized by aerial cables with a core of tensile-resistant carrier elements and one or more rows of electrical conductors surrounding the core, the carrier elements being mechanically linked by means of a snap connection or a spiral armature resistant to traction and the electrical conductors are connected electrically by means of an aluminum spiral. 3. Device according to claim 1 or 2, characterized in that the perforations for the introduction of the optical fibers are sealed by a screwed-in cable or a shrinkage hose. 4. Device according to claims 1 to 3, characterized in that the outer tube of the tubes concentric in the longitudinal direction, the annular notch is movable freely and is sealed by means of rubber rings. 5. Device according to claims 1 to 4, characterized in that each is surrounded at a distance by another metal protection which at its end runs conically and on the end side is supported on the aerial cables fidendose there by means of clamps clamps. 6. Device according to claim 5, characterized in that the protection element consists of a cylindrical metal tube having at its ends a corresponding conical bell bolted inside or outside. 7. - Device according to claims ß, characterized in that on the core that remains free of the electrical conductors sits a guide ring which has a groove in a certain length and the tube containing the fibers or is guided outward from the soul through the slot. 8. Device according to claims 1 to 7, characterized in that in the interior of the concentric tube of the each at least one tooth of emplame has been fixed. 9. Device according to claim 8, characterized in that the splicing tooth is curved corresponding to the surface of the tube jacket. 10. Device according to claims 1 to 9, characterized in that several distance pins, as well as several guide fingers, are fixed on the surface of the inner tube of the concentric tubes of the box. RTCRTTMB-N DK T.A TNVTCNpTON A device is described for joining two aerial electric cables with conductive elements of light waves arranged in a strung connection of electrical conductors and tensile carrier elements, light conducting elements made of tubes containing optical fibers. Means are provided for the mechanical and electrically conductive connection of the electrical conductor and the tensile carrying elements of each aerial cable as well as one each sealed for the reception of the junctions of the electrical fibers. The each [5] consists of two concentric tubes separated from each other [7], 9], whose annular notch is sealed at both ends. The optical fibers are introduced into the annular notch through perforations [12] that exist in the sealing [8] on the end side. The connection junction as well as a reserve length of the optical fibers are placed in the annular notch, and the each [5] surrounds the means [21,3] for the mechanical and electrically conductive connection and is fidada on the means [ 3] or aerial cables [1].