Cable clutch

 

(57) Abstract:

The invention relates to a cable coupler for armoured cables transmitting elements which are inside the Central tube. Reservation subject to connection cables mutually twisted over protective pipe, which covers the area of the splice. Top bred top spiral. The technical result is increased reliability when operating in permafrost conditions by increasing flexibility and reducing the thickness of the coupling, which reduces the frequency of damage in the transition region between the cable and the clutch. 19 C.p. f-crystals, 5 Il.

The invention relates to a cable clutch with external (thermo) usively cover for splicing armoured cables, transmitting elements which are inside the Central tube, preferably of fiber-optic cables, and the area of the splice couplings blocked top spiral.

From published German application 4126464 A1 known coupling for reception places splicing armoured cables, preferably of fiber-optic cables. This coupling is flexible in the longitudinal direction and strong in tension. Armor both put in the clutch cables removed until obladala, which is fixed on the prepared ends of the armor cables. Such couplings are particularly suitable for use in compounds of marine cables.

In areas of permafrost was still common to use a cable clutch, the diameter of which, as a rule, three to five times greater than the diameter of the cable. The maximum value is obtained if the coupling of splicing is still enclosed in a protective sleeve, for example, of cast iron. The most common type of damage in permafrost areas is, however, the transition region between the cable and the clutch. Emerging damage due to the following effects.

Due to different cable diameters and cable couplings can be determined various characteristics of upwelling when changing between melted and frozen state, so that in the transition areas may apply significant forces. In General, the soil in the whole year is frozen, but in the summer can thaw at the surface to a depth of about 1 m Hence different conditions. When different strong thawing of the soil may experience significant axial displacement, and then under certain conditions, a cable sleeve with a larger diameter molobi as possible to eliminate these effects, so far the cables before landing in the clutch stack with the excess length of the arcs so that the relative movement can be compensated. The other way is the use of couplings in which the inputs and outputs cable located on one side of the coupling. Sometimes also used conical transitions from coupling to the cable. Despite this, the above mentioned possibility of damage in these areas of permafrost cannot be excluded.

The basis of the invention lies in the task of creating a flexible and very thin clutch, which basically has the properties of the cable so that the outward to the environment conditions are the same.

This problem is solved according to the invention a cable coupling the above described type due to the fact that splices placed in a protective tube, the protective tube firmly against the pressure and stretching are fixed on the ends of the Central tubes entered cables, and the protective tube has an external diameter less than or equal to the inner diameter of the armor cables, the ends are made from woven from single wire armour cables are laid over the protective pipe, and at the ends of the armor every second individual wire cut so that each armor of nachal the one end of the armor so what is again closed twisted armor and that top spiral is located on mutually twisted over protective tube armored cable.

A significant advantage corresponding to the invention the coupling should see that it is very thin and has a thickness in comparison with the cables as much as 30%. Through the use of top of the spiral, which is located above the mutual armor of the cable, the clutch remains flexible. However, in addition, provides good electrical conducting connection between the reservations of both cables and cover spiral. This is necessary because permafrost areas are also the areas with strong lightning damage. The reason for this lies in the low conductivity of the soil. In addition, inside sleeve can accommodate a ground wire or armor or on top of the spiral measuring wire which can then be hermetically brought out into the open. Here you can, for example, to measure isolation.

The coupling according to the invention is suitable for the reception of cables round cross-section, in which the inside of the Central tube are transmitting elements, such as optical fibers. Above the Central tube is the length of connected cables first unbend from the inner shell of the cable. In short destination area also remove the inner cable sheath so that the Central tube is free. This freed end of the Central tube after completing the installation work firmly against the pressure and stretching fix the protective pipe, which then are splices of optical fibers. At the end of the second cable also unbend single wire armour, and this area is more on the length of the protective tube. In this artboard also remove the inner shell so that the Central tube of the cable is free. Thus the protective pipe during installation work in places splicing may move above the mounting region so that the region places splicing is available for manufacturing places splicing. After completion of the joining of the protective pipe is pushed back to the end of the Central tube of the first cable and in this position at its both ends fixed on the Central pipes of both cables, preferably by compression, i.e. crimp protective tube on the Central pipe. Thus the space of the splice is protected. The rest of the mounting region of the second Central tube filled again podhodyashey. Then restores the armor, and it produces mutual twisting of the ends of the armor of both cables. This is done so that respectively one single wire armour shorten, while following a separate wire leave with its length. Thus obtained, respectively, the spacing of wires in the same armor and then in these periods of wires is inserted and twisted left to their length of single wire armour of the second cable so that it referred to the mutual twisting. This has the advantage that outside the region of the coupling is held closed armor, and segments or lengths of the individual fibers aligned so that they are respectively axially stakeouts. On this mutual twisting armor both cables optional pull top spiral, which provides strength to tension and pressure in the longitudinal direction. This cover spiral has the additional effect that it is firmly presses to each other in the radial direction stranded single wire armour of both cables and thus creates a good electrical contact.

Covering both spiral cables dialno to ensure good electrical transition is "ipecacuana in partial fields produced thereby in neopeaceniks areas make good electrical transitions. In addition, it is possible to mix silica sand with a conductive material, for example steel scales, so that also at the expense of this can be created a good electrical transition. When applying the coating helix uncoated between the individual wires of the armor and outer spiral is applied electrically conductive material and quartz sand. When fully "operatsinnoy" top spiral should care about it after installation pressed single wire armour cable to each other to provide electrical contact. In addition, you can use the optional metal pipe or a protective pipe made of metal, which is then electrically conductive zapressovyvajut wire armor. As previously explained, the protective tube can be made of metal so that contact has only one element.

The protective tube can be optionally provided with holes, through which space the splicing may be filled probably desirable fillers.

At the end of the Central pipe is inserted cable can vdvinut'sā support pipe through cat

Exempt mounting area of the second cable after fixing the protective pipe fill over the area of the splice filler, and here may apply paleobiology of any material, split hose, heat hose or similar elements.

On the ground compression between the Central tube and the protective tube can also be used for reliability apply a suitable adhesive.

The coupling according to the invention can be used in underground cable installations and connections grounding cables or phase conductors of high voltage installations, because it also requires a good longitudinal conductivity. When used in underground cable installations cable clutch still surround the outer (thermo) usively requirement for corrosion protection cover, which can be waived when used in high-voltage installations.

The invention is explained in more detail with the help of five drawings.

Fig. 1 shows the principle of making a cable termination.

Fig. 2 shows the construction of the coupling in cross-section.

Fig. 3 shows a cross section of fiber-optic cable with Central tube and armor.

the attachment region of the connection to the measuring line according to Fig. 4.

In Fig. 1 is illustrated the manufacture cables according to the invention. Both cables K1, K2, in which the outer jacket of the cable, not shown, must be connected to each other in the coupling according to the invention. When it comes to cables having a Central tube ZR1 or ZR2, which are fiber LWL. These fiber optic cables LWL both cables K1, K2 are connected to each other in places splicing S. These splices S placed inside the protective tube SR, which on both end sides are fixed to the Central tube ZR1 or ZR2. In particular, it is preferable fixing in place modular K, however, there are also other commits. On both ends of the cables K1 or K2 respectively unbend single wire armour B1 or B2 respectively, and the length is selected so that the individual wires exceed the length of the entire joint area. The inner cable sheath Ml of cable K1 remove only so far from the Central pipe ZR1, to be able to handling and fixing of the protective tube SR. The inner cable sheath M2 cable K2 in contrast, removes the artboard MV so far to protective pipe SR could be autoholowanie places splicing. After the manufacture of the compounds produced, a protective pipe SR again pull over space splicing up until the end will not meet with the Central pipe ZR1 cable Kl. After that, on both end sides of the protective tube SR produce a recording, for example, by crimping K. Protective tube SR may be provided with openings O, which may be filling the space with splicing. Then make the filling artboard MB placeholder that can be made in the form of paleobiologic, winding ribbon, split hose, (thermo) usagepage hose or similar elements. The filling is produced so that the ends of the mounting region MB there are no stairs. Now produce the manufacture of armor around the protective tube SR, and this armor B1/B2 is obtained by mutual insertion of the individual wires of the ends of the cables K1 or K2 respectively. This requires that a separate wire EDK1 or EDK2 (not shown) is shortened, while the next single wire EDL1 or EDL2 (not shown) remained with the length, overlapping the clutch. Due to this, in each of the two armor B1 or B2 respectively poluchaets the measures so that there are formed gaps DL2 between also exceeding the length of the coupling of the individual wires EDL2.

Performing in this manner armor B2 in Fig.1 for visibility is not shown; however, it is similar to the run on the left side of the drawing. After this "thinning" of the individual armor wires B1 or B2 respectively, these separate wire can be rolled in a protective tube SR, and in the intervals wires one armor entered a long wire other armor. Thus a complete and consistent twisting in the region of the coupling beyond the protective tube SR, and due to this it turns out is also mutual electrical contacts armor. After making mutually combined armor B1/B2 over this area, pull the top of the spiral, thereby armor B1 and B2 are connected to each other firmly on stretching and pressure. In addition, it turns out the necessary contacts between the individual elements of the armor. Finally, the entire device is applied corrosion protection, for example (thermo) usively cover, which, however, is not shown here.

Fig. 2 shows a cross section through the cable gland according to izaberete and protective pipe shown mutual armor B1/B2, formed out of a mutual introduction of separate wires armor B1 or B2 respectively. This armor layer B1/B2 tight top spiral DS, which, finally, surrounded corrosion protection in the form of (thermo) usively shell SU.

Fig. 3 explains the cross-section of cable that can be used for connection inside the cable coupling according to the invention. Inside the Central pipe ZR1 or ZR2 are fiber optic cables LWL. The Central pipe ZR1 or ZR2 tight inner sheath M1 or M2, respectively, which caused the armor B1 or B2 respectively.

Fig. 4 illustrates how the invention may communicate the output of the measurement line ML at the rear, in this case on top of the spiral DS inside a cable clutch. To do this, cut a separate wire GDDS in top spiral DS and the segment is removed from the connection so that the introduction of the measurement line ML is created between. This measuring line L equipped with cable lug KS, the ends of which are enclosed under the cover spiral DS around mutually made armor or electrically conductive pipe or around electrically conductive protective tube. Due to this, create the flax fusible adhesive, moreover, the compaction occurs when (thermo) sitting cover SU. In addition, we see that the coupling device is covered (thermo) usively cover SU as protection against corrosion and is seated at the ends of the outer shell AM1 or AM2 cables K1 and K2 respectively.

Fig. 5 shows the connection of the measurement line ML, which is equipped with a cable lug KS. This cable lug KS inner ends includes establishing contact between the top coil DS and protective tube SR. This type of contact is of course also possible to carry on mutual armor, as it explained in the previous examples.

1. Cable clutch with external heat-shrinkable sheath for splicing armoured cables, transmitting elements which are held inside the Central tube, preferably of fiber-optic cables, and the area of the splice couplings blocked top spiral, characterized in that splices (S) arranged in a protective tube (SR) that the protective tube (SR) firmly against the pressure and stretching are fixed on the ends of the Central tubes (ZR1,ZR2) entered cables (K1, K2), with protective tube (SR) has an external diameter less than or equal to the internal di is n EDL2, EDK2) armor (B1,B2) cables (K1, K2) are applied to the protective pipe (SR), and at the ends of the armor (B1, B2) each second individual wire (ED1, DK2) cut so that each armor (B1, B2) is first formed gaps (DL1, DL2), which are then mutually entered the remaining long wire (EDL1, EDL2) the opposite end of the reservation (B1, B2) so that we obtain a closed twisted armor (B1/B2) and that top spiral (DS) is superimposed over the protective tube (SR) armor cable (K1, K2).

2. Clutch under item 1, characterized in that the protective tube (SR) compressed at the ends of the Central tubes (ZR1, ZR2) cables (K1, K2).

3. The clutch on p. 2, characterized in that it has a support pipe (STR) in the ends of the Central tubes (ZR1, ZR2) cables (K1, K2), which is pushed into the region of compression ().

4. The coupling according to any one of the preceding paragraphs, characterized in that the end of one cable (K2) is released from its inner lying under armour (B2) of the membrane (M2) on the artboard (MV), which corresponds to the length of the protective tube (SR), and this artboard (MV) after fixation of the protective tube (SR) filled with filling material (FM) to the thickness of the inner shell (M2).

5. The coupling according to any one of the preceding paragraphs, characterized in that the protective mswb, characterized in that the protective tube is made of plastically deformable material.

7. The clutch on p. 6, characterized in that the protective tube is made of metal.

8. The clutch on p. 4, characterized in that the filling material (FM) is a split hose.

9. The clutch on p. 4, characterized in that the filling material (FM) is made in the form of paleobiologic.

10. The clutch on p. 4, characterized in that the filling material (FM) is a heat-shrinkable sleeve.

11. The coupling according to any one of the preceding paragraphs, characterized in that in the area of compression (K) between the protective tube (SR) and the Central pipe (ZR1, ZR2) is added to the glue.

12. The coupling according to any one of the preceding paragraphs, characterized in that the contact terminal of the ground or test leads (ML) attached to the armor and hermetically removed from the clutch.

13. The coupling according to any one of the preceding paragraphs, characterized in that the covering device (DS), at least in partial areas covered by a layer of quartz sand.

14. The clutch on p. 13, characterized in that the quartz sand is mixed with conductive metal particles, preferably steel scales.

15. Clutch under item 13 or 14, characterized in that the quartz is a spiral (DS).

16. The clutch on p. 13, characterized in that the covering device (SD) is fully covered with quartz sand, and top spiral (SD) pushes each other individual wire (EDL1, DL2) armor (B1/B2) to ensure electrical contact.

17. The coupling according to any one of the preceding paragraphs, characterized in that the covering device (SD) is made in the form of a metal pipe.

18. The coupling according to any one of the preceding paragraphs, characterized in that it is used in underground cable installations.

19. The coupling according to any one of paragraphs.1-17, characterized in that it is used for grounding cables or phase wires of high-voltage installations.

20. The coupling according to any one of the preceding paragraphs, characterized in that all the individual elements of the coupling is arranged to ensure a flow of electric current.

 

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