Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
  • H02G15/00—Cable fittings
  • H02G15/013—Sealing means for cable inlets
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
  • H02G15/00—Cable fittings
  • H02G15/08—Cable junctions
  • H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
  • H02G15/113—Boxes split longitudinally in main cable direction

Definitions

• the present invention relates to a sleeve for enclosing cable connections and the like.
• Cables in the sense of the invention can be both telecommunication cables and fiber optic cables or power cables.
• the cable connections, if they are laid in the ground, must be reliably protected against the influence of moisture, dirt and the like. Complete tightness must be ensured even when external pressure is applied.
• such a sleeve consists of the following components: two half-shells which enclose a space which is designed to accommodate the cable connection, the half-shells each having a flange-like edge; a longitudinal seal which is arranged between the flange-like edges and which seals the gap between them;
• Clamping elements that press the two half-shells together at the flange-like edges; a plurality of sockets which have sections which are formed on the half-shells and project from them, the sockets having openings for the passage of cables; and
• Sealing elements which are provided for sealing the cable against the socket.
• holding devices are preferably provided on one of the two half-shells, which are used to fasten the cables.
• connection and branching of cables laid in the ground is done by splicing. In this way it is also possible to produce branches. After establishing such a connection, it is necessary to seal the splice completely tight, in order to reliably prevent the ingress of water.
• a known method for producing such a connection consists in surrounding the splice with a lead sleeve, soldering it tightly and then protecting the lead sleeve with a protective sleeve against earth pressure.
• Another known method consists in the use of shrink sleeves and shrink sleeves, which are shrunk onto the splice. Such a process is on site, i.e. in a narrow cable duct, difficult to carry out. Furthermore, this method is very sensitive to environmental influences and deviations in the implementation. For example, dust or a too strong flame can lead to a faulty and leaky sleeve.
• cable sleeves which consist of two half-shells which can be screwed together. Sealing sleeves are provided in the area of the leadthroughs for the cables, which are pressed in between the cable and the opening when the half-shells are screwed together and thus produce a seal.
• Such a connection requires a suitable sealing sleeve for every cable diameter, and the reliability of the system depends heavily on the correct selection of the right sleeve. It is obvious that a cuff that is too thin cannot produce a tight seal. On the other hand, the choice of a cuff that is too thick can lead to leaks in the area of the adjacent longitudinal seal. It is very complex to ensure that the sleeves required for the respective application are always available. Even compensation with winding tapes can only solve these problems unsatisfactorily, since in such a case the skill of the respective user is very important.
• a sleeve which consists of a longitudinally divided sleeve tube with sealing bodies at the end.
• the sealing bodies each close off an axial end of the sleeve pipe and lie sealingly on the inside thereof.
• inlet sockets are formed which are sealed with a sealing element against an inserted cable.
• this known sleeve has a large number of sealing surfaces which meet at different points. For example, a sealing element is sealed on the one hand against the cables on the other hand against a sealing body.
• the sealing body the is in turn made of several parts, has a sealing element between its individual parts.
• sealing body must be sealed off from the socket pipe, which in turn must have a seal on its longitudinal division. It has proven to be extremely difficult to reliably seal all of these different sealing points.
• a particular weak point of this system is the sealing of the sealing bodies with respect to the socket pipe and, in particular, the point at which the division of the sealing bodies intersects their circumference.
• the object of the present invention is to create a cable sleeve in which the disadvantages described above can be avoided, and which in particular makes it possible to create a permanent and absolutely tight sheath of the cable connection in a simple manner. This should be possible in particular under the cramped and difficult conditions that generally exist when laying underground cables. Furthermore, it should be possible to cover a large number of applications with as few different components as possible, and in particular the same components should be usable for several different cable diameters.
• Another object of the invention is to provide a sealing element which makes it possible to ensure that the cable is sealed off from the sleeve, which is largely independent of the sealing of the half-shells of the sleeve from one another.
• the sealing elements each enclose a cable sealingly at one end and bear sealingly at the other end on the outside of the connecting piece. In this way it is achieved that the sealing of the two half-shells against one another is completely independent of the sealing in the area of the cable bushings.
• the sealing of the sealing elements on the outside of the nozzle is easily accessible. Another advantage is that the sealing effect is automatically increased when the pressure is applied from the outside.
• a hose tie can be provided, which compresses the sealing element from the outside, but in many applications this will not be necessary.
• the individual force components are completely decoupled. So is for example, the force exerted by the fastening elements that press the two half-shells together is only responsible for the tightness in the area of the longitudinal seal.
• the sealing of the cable against the socket is completely independent of this force and also of the extent to which the longitudinal seal is compressed.
• the tightness of the sleeve is ensured on the one hand by the fact that it rests on the cable and on the other hand by the fact that it rests on the socket.
• a separate force, which is responsible for this sealing effect can additionally be applied here by means of hose ties.
• the forces exerted by the cable on the sleeve and vice versa are again to be seen completely separately from the two above forces. These are absorbed by a separate strain relief.
• the sealing elements consist of a substantially conical section which is adjoined by a deflecting section which is designed to encompass the end face of the connecting piece, the sealing elements furthermore having a sealing section which is designed to seal to lie on the outside of the nozzle.
• the respective sealing element in the conical part is then cut off appropriately, so that an opening results which is to a certain extent smaller than the outside diameter of the respective cable. If the sealing element is then pulled over the cable, the widening creates a tension which ensures a tight fit.
• a hose clamp can be attached, but this is only an additional safeguard. In this way, a wide range of cables with different diameters can be covered with a single sealing element. This simplifies storage and manipulation considerably.
• the longitudinal seal consists of several sections, each of which is separated from one another by openings for the passage of cables. This means that sleeves can be replaced at any time later without having to open the splice.
• a particularly good seal in the area of the transition from the longitudinal seal to the sealing element is achieved in that the longitudinal seal is designed as a profile with an essentially T-shaped cross section, one leg of the profile being pressed into a groove, which is provided in a flange-like edge, and wherein a further leg of the profile protrudes beyond the peripheral edge of the nozzle at least in the region of the nozzle. In this way, an overlap of the longitudinal seal with the projection of the sealing section of the sealing element is brought about.
• a lintel consists of a loose auxiliary element which is essentially ring-shaped and on which the associated sealing element rests on the outside, and of sections formed on the half-shells, the auxiliary element contacting the sealing element presses these sections.
• Relief of the splice against any type of mechanical stress, such as tensile or torsional stress, can be achieved by providing appropriately designed holding devices for the cables to be connected in at least one half-shell, which preferably have interchangeable elastic inserts for cables have different diameters. By absorbing tensile, compressive, bending and torsional forces and moments, the splice itself remains absolutely stress-free.
• the present invention relates to a sealing element for a sleeve for enclosing cable connections and the like, consisting of an essentially conical section which is designed to tightly enclose a cable after the production of an opening, a deflecting section, which is essentially toroidal and which adjoins the conical section, as well as a sealing cut, which is substantially cylindrical and is arranged radially outside a part of the substantially conical section.
• a sealing element for a sleeve for enclosing cable connections and the like, consisting of an essentially conical section which is designed to tightly enclose a cable after the production of an opening, a deflecting section, which is essentially toroidal and which adjoins the conical section, as well as a sealing cut, which is substantially cylindrical and is arranged radially outside a part of the substantially conical section.
• a seat for a hose tie is provided on the outside of the sealing section.
• FIG. 1 shows a lower half-shell of a sleeve according to the invention in a view from above with cut sealing elements
• Figure 2 is a partial section of the sleeve according to the invention through the flange-like edge.
• FIG. 3 shows a detail of FIG. 1 in the area of a connecting piece on an enlarged scale
• FIG. 5 shows a holding device for a cable on an enlarged scale
• FIG. 6 shows a detail of another embodiment variant of the invention in a representation that corresponds to that of FIG. 3;
• FIG. 8 shows an end view of a modified embodiment variant of a sealing element
• FIG. 10 shows a partially sectioned detail of a further embodiment variant of the invention.
• the half-shell 2 has a trough-shaped structure.
• the upper edge 2a is in the form of a flange.
• connectors 2b, 2c and 2d formed, each ending in the shape of a half cylinder.
• a longitudinal seal 3 is pressed into a groove of the half-shell 2 and runs over the entire length of the edge of the half-shell.
• screws 4 are provided in order to connect the lower half-shell 2 to an upper half-shell 1 in a sealing manner.
• Sealing elements 5, 15 and 25 are placed on each connection piece 2b, 2c, 2d, which enable the connection piece 2b, 2c, 2d to be sealed off from cables not shown in FIG. 1. 1, these sealing elements 5, 15 and 25, which are designed in the form of grommets, are shown in the original production state.
• the tapered ends are cut by the user depending on the cable diameter on site to create the required tapered end.
• holding devices 7, 17 and 27 are provided, which allow the cables to be relieved of mechanical stresses by absorbing the load acting on the cables.
• the construction of the connection of the two half-shells 1 and 2 can be seen in detail from FIG.
• the longitudinal seal 3 is T-shaped and protrudes a little on the inside of the two half-shells 1, 2.
• the screw 4 presses the half-shells 1 and 2 against each other.
• the sealing element 5 consists of a substantially conical section 5a, a deflecting section 5b, in which the sealing element 5 is bent so that the inside comes to lie outwards, and a sealing section 5c, which is intended for the outside to lie on the nozzle and to produce the required seal. Furthermore, an extension 5d is formed on this sealing section 5c «Pulling off the sealing element 5 facilitated.
• the sealing element 5 is shown in broken lines with broken lines.
• the sealing element 5 applied to a cable 10 is shown in more detail in FIG. 4. It can be seen that the conical section 5a is elastically expanded and thus presses tightly against the cable 10. For safety reasons, a hose tie can be provided in this section. Furthermore, it can be seen from this figure that in the sealing section 5c on the outside there is a seat 5f for a hose connector (not shown), which is intended to serve to secure the seal against the connector. On the inside of the Sealing section 5c is formed on a projection 5e, which cooperates with a corresponding groove on the outside of the connecting piece in order to improve the sealing fit.
• FIG. 5 shows a holding device 7, 17 or 27 which can absorb any tensile, compressive, bending or torsional moments which are exerted on the cable ends. The splice can thereby be protected against damage.
• Elastic inserts 19 are provided in a variable holder 18, whereby cables 10 of different diameters can be held securely. The cable is held in the holder 18 by one or more hose ties, not shown in FIG. 5.
• the sealing element 35 which has a bead 35a at its end, is clamped between the outer surface of the auxiliary element 12 and the inner surface of the half-shells 1 and 2, as a result of which a sealing effect is achieved.
• the bead 35a is fitted on both sides in corresponding grooves.
• FIG. 7 shows the assembly sequence of a sleeve according to the invention schematically.
• the sealing elements 5 are first cut to size according to the diameter of the cables 10 to be connected at the conical section. Markings can help you choose the interface.
• a first hose tie 20 is first loosely pushed onto the right cable end, then the sealing element 5 is pulled onto the cable end by widening the conical section, and finally three further hose ties 21, 22, 23 are loosely pushed onto the cable end.
• the left cable end is prepared in the same way, but this is not shown in detail.
• the splice 30 thus produced is placed in the lower half-shell 2 in D.
• the hose ties 22 and 23 serve to compress the holding devices 7 for strain relief.
• the hose ties 21 are used to secure the sealing elements 5 on the cable 10.
• the sealing elements 5 are first pulled outwards, and the upper half-shell 1 is placed on the lower half-shell 2. Tightening the screws 4 ensures that the two half-shells 1 and 2 are sealed against one another.
• the sealing elements 5 are ultimately turned back, an exact fit on the corresponding connector being ensured. Finally, the hose ties 20 are tightened to secure the seat of the sealing elements 5 on the connecting piece.
• the embodiment of the sealing element according to FIGS. 8 and 9 differs from the embodiment of FIG. 4 in that the sealing element 45 has a conical section 45a with two tips 45b and 45c. It is thus possible to lead either one or two cables through this sealing element 45. If only one cable is to be used, only one of the tips, eg 45b, is cut according to the cable diameter. Both tips 45b and 45c are cut open for the 4 sealing of two cables. Depending on the intended use, the two tips 45b and 45c can be made the same or different. If, for example, a case frequently occurs during use in which some wires branch off from a thick cable harness, this means that a thin and a thick cable emerge from a sleeve 45. To the To facilitate the corresponding work, one of the two tips 45b, 45c can therefore be made thicker and longer than the other.
• FIG. 10 A further embodiment variant of the invention is shown in FIG. 10. Repairs or the like can occur when a sleeve is to be placed around an existing splice without opening this splice.
• the problem with the above embodiment variants would be that the sealing elements cannot be pushed onto the cable.
• the sealing element consists of a holding body 50 which is essentially conical in order to enclose the sleeve on the socket 2b at its larger end and to enclose a cable at its smaller end.
• the holding body 50 is elastically formed along one generating end 50a and divided at its other generating end 50b. It is therefore possible to pull the holding body 50 after elastic expansion on the one hand over the sleeve 2b and on the other hand over the cable.
• the actual sealing element which is not shown in FIG. 10 for reasons of clarity, is applied to the holding body 50.
• the sealing element is applied to the holding body 50 in the form of a reel made of a butyl tape, the reel being continued beyond the tip of the cone in order to enclose the cable.
• the winding is also continued beyond the holding element 50 and beyond the sleeve.
• a small wrap of the butyl tape can also be provided between the cable and the holding body 50 in order to ensure an additional seal.
• a further wrap of the butyl tape can be provided between the nozzle and the large end of the holding body 50.
• the butyl tape used is a self-welding plastic tape which is available from specialist dealers for sealing purposes.
• the sleeve according to the invention is easy to use, relatively insensitive to unfavorable conditions during assembly and also easy to dismantle.

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• Cable Accessories (AREA)

Applications Claiming Priority (5)

Publications (1)

Family

ID=25592073

Family Applications (1)

Country Status (7)

Cited By (1)

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Family Cites Families (6)

• 1996
  • 1996-05-07 EP EP96910856A patent/EP0824775A1/de not_active Withdrawn
  • 1996-05-07 AU AU53928/96A patent/AU5392896A/en not_active Abandoned
  • 1996-05-07 SK SK1499-97A patent/SK149997A3/sk unknown
  • 1996-05-07 CZ CZ973539A patent/CZ353997A3/cs unknown
  • 1996-05-07 PL PL96323634A patent/PL323634A1/xx unknown
  • 1996-05-07 HU HU9802700A patent/HUP9802700A3/hu unknown
  • 1996-05-07 WO PCT/AT1996/000090 patent/WO1996036096A1/de not_active Application Discontinuation

Non-Patent Citations (1)

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