RU2485560C2 - Four-chamber optical communication cable - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: communication cable contains optical fibres, two C-shaped modules with main reinforcing elements, two water-blocking bands, additional strength elements on the external polymer shell, two pairs of cords disrupting the external shell, an intermediate polymer perforated shell with to disrupting cords. Placed in the centre of the circle circumscribed by the internal surfaces of the C-shaped modules are a polymer cross-shaped divisor element and optic fibres. The beams of the divisor element come in touch with the external circle of the C-shaped modules thus forming a four-chamber structure with optical fibres in each chamber. Designation of the disrupting cords in the external shell is implemented by way of a projection on the external shell external surface (one projection per cord).

EFFECT: decreased time of the optic cable recovery after damage and ensuring optical fibres protection against moisture penetration.

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Description

The invention relates to the field of electrical engineering and can be used in the construction of optical communication cables in the construction of fiber-optic communication lines.

The known design of the optical cable (OK) type DPO, DNO for laying in cable ducts, blocks, in protective polyethylene pipes. It contains a central power element, a polymer tube with freely laid optical fibers (OB), a filling core, a hydrophobic compound, a fastening sheath made of plastic tapes, an outer polyethylene sheath (Reference “Russian-made optical communication cables”, A. S. Vorontsov, O. I.Gurin, S.Kh. Miftyakhetdinov, K.K.Nikolsky, S.E. Piterskikh, Eco-Trends. M., 2003, 285 p., Fig. 4.25, construction of DPO, DNO, p.146) .

The disadvantage of this design is the difficulty of access to the OM when the OK is damaged and its operation without damage and opening of most of the polymer elements, including polymer tubes with freely laid optical fibers.

Known for the design of optical cable (International Wire and Cable Symposium. Proceedings of the 56 IWCS, 2007, fig. 1, pp. 225. Ken Osato, Yoshio Hashimoto, Naoki Okado / New design of optical fiber cable for easy mid-span access, pp .225-229), containing optical fibers in polymer tapes, a hydrophobic filler, a C-shaped module, the main reinforcing element in this module, an additional force element in the outer polymer coating, a water blocking tape and two tearing outer sheaths of the cord located symmetrically relative to each other closer to the vertices of the C-shape module, two protrusions on the outer surface of the outer shells indicating the location of two cords tearing the outer shell.

The disadvantage of this design is the possibility of moisture penetration due to the removal of the water blocking tape from the C-shape of the module when accessing all the fibers at once, while access to one or more optical fibers is required, and the difficulty of identifying the required optical fiber with a large number of them.

The closest in technical essence is the design of OK according to the patent for the invention RU No. 2358344 C1, IPC НВВ 11/22 from 06/10/2009, Optical communication cable, authors Portnov EL, Zelyutkov EA The design of the optical cable contains optical fibers in polymer tapes, a hydrophobic filler, a C-shaped module, the main reinforcing element in this module, an additional power element in the outer polymer coating, a water blocking tape and two tearing outer sheaths of the cord, which are located on the same line symmetrically with respect to the center the cable is closer to the vertices of the C-shape of the module, while the C-shape of the module is made by covering one of the peaks with another vertex overlapping, a water blocking tape is located along the entire length of the inside the cross section of the C-shape of the module with overlapping edges, and two grooves are made on the outer surface of the outer shell, indicating the location of two cords breaking the outer shell.

The disadvantage of this design is also the difficulty of quick access and quick identification of optical fibers with a large number of them when the optical cable is damaged, which requires considerable time to restore the operability of the entire structure as a whole.

The task to which this technical solution is aimed is to create such a design of an optical communication cable that not only makes it easy to open the optical core, quickly identifies and removes one of the optical fibers, but also reduces the damage repair time on the cable and protects everything from moisture penetration OV during repair OK.

To solve the problem in an optical communication cable containing optical fibers, a C-shaped module, the main reinforcing element in this module, an additional power element in the outer polymer coating, a water blocking tape and two tearing the outer sheath of the cord, according to the invention, to the center of the circle described by the inner the surface of the C-shape of the module, a polymer spacer element is introduced with optical fibers in the form of a cross, the three beams of which are in contact with the inner circumference of the C-shape of the module, while up to A complementary C-shaped module, superimposed in antiphase on an existing C-shaped module of the same design, with its vertices facing the vertices of the existing C-shaped module, creating a four-chamber optical cable structure, in each chamber of which there are optical fibers superimposed on the outer surface of the C-shaped modules water-blocking tapes overlap each other's edges, as when applying the C-shape of the modules, an additional force element in the outer shell is strictly symmetrical with respect to the inserted one of the power element and divides the outer shell in half, two cords breaking the outer shell are also introduced in such a way that relative to each power element in the outer shell there are symmetrically two breaking cords, the designation of which is realized for each protrusion on the outer surface of the outer shell.

Figure 1 shows the design of a four-chamber optical cable. It contains optical fibers 1, a polymer spacer in the form of a cross 2, optical fibers 1 in polymer C-shaped modules 3 and 5, water blocking tapes 7 and 8 and an outer polymer shell 10, a polymer power element 4 and 6 in each C-shaped module 3 and 5, water blocking tapes 7 and 8 on each C-shaped module 3 and 5, an intermediate polymer perforated shell 9 with two tearing cords 11 and 12, four tearing casing shells 15, 16, 17 18 with protrusions 19, 20, 21, 22 on the outer surface of the outer polymer shell 10, between every two breaks ayuschimi cords 15 and 17, 16 and 18 are arranged on the outer shell embedded into the shell bearing elements 13 and 14 aligned with the tearing cords 11 and 12 intermediate the apertured polymeric shell 9.

As a result, if OB fails in the cable using four cords, the location of which is indicated on the outer surface of the outer polymer sheath of the cable by two intermittent protrusions, the upper and lower halves of the outer sheath are opened, then using two cords whose location is indicated on the outer surface of the inner polymer sheath, the inner polymer shell is opened, then the water blocking tape is removed from one C-shape of the module and the damaged fiber is taken out, the necessary repair of the OM is carried out, This fiber is poured into the module, a water-blocking tape is put on the C-shape module, the inner shell is closed and its tightness is restored, the outer shell is closed and its tightness is restored. This significantly speeds up the process of opening the optical cable, identifying optical fibers and restoring the performance of the optical fiber and the optical fiber without disconnecting the line and without penetrating moisture to the optical fiber due to the presence of a water blocking tape on each C-shaped module, the location of the C-shaped modules with their peaks in the inner surface of the inner polymer shells, speed of restoration work due to the openness of the C-shape of the modules.

Claims (1)

A four-chamber optical communication cable containing optical fibers, a C-shaped module, the main reinforcing element in this module, an additional power element in the outer polymer coating, two tearing the outer sheath of the cord, located closer to the vertices of the C-shaped module, characterized in that in the center of the circle described by the inner surface of the C-shape of the module, a polymer dividing element with optical fibers in the form of a cross is introduced, three beams of which are in contact with the inner circumference of the C-shape of the module, an additional C-shaped module, superimposed in antiphase on an existing C-shaped module of the same design with its vertices facing the vertices of the existing C-shaped module, creating a four-chamber optical cable structure, in each chamber of which there are optical fibers superimposed on the outer surface of the C-shaped modules two water-blocking tapes overlap each other's edges as when applying C-shaped modules, an intermediate polymer perforated shell is introduced with two tearing cords separating its pop Olam, and the additional force element in the outer shell is located strictly symmetrically with respect to the introduced another force element and divide the outer shell in half and are in line with the tearing cords of the intermediate polymer perforated shell, two additional tearing cords are also introduced in such a way that relative to each a force element in the outer shell there are symmetrically two tearing cords, the designation of which is realized for each protrusion on the outer erhnosti outer shell.