RU2321123C1 - Screened communication cable terminator for structured cable networks - Google Patents

Abstract

FIELD: subsurface laying of screened communication cables designed for local communication networks to operate at high frequencies and as "last-mile" cables.

SUBSTANCE: proposed terminator for copper-conductor communication cables designed for use in structured cable systems of categories 5 and 5e (up to 100 MHz and higher) has sleeve-shaped plastic body with round bottom on one end and cylindrical opening on opposite end, spliced conductors of cable ends being spliced which are potted in sealing compound within cable terminator; spliced insulated copper conductors are sealed with aid of type UY-2 connectors accommodating water-repelling filler; spliced conductors are disposed inside reticular screen made in the form of reticular copper sleeve reliably electrically connected to screens of cable ends being spliced in structured cable networks by winding sub-screen tinned copper wires of cable on sleeve and potting core splice of cable screened with reticular copper sleeve in terminator by cold-hardened polyurethane sealing compound VILAD-13.

EFFECT: enlarged functional capabilities of terminator.

1 cl, 6 dwg

Description

The invention relates to means for installing an underground installation of shielded communication cables with copper conductors intended for use on local communication networks that are operated in structured cable systems of the “5” and “5e” categories (up to 100 MHz and higher), i.e. operating at high frequencies, as well as “last mile” cables.

There are known dead-end couplings of symmetric single-quadrature cables of zone communication of type ZKP (1), single-quadrature cables of rural communication of type KSPP (KSPPZ) (2) operating in the frequency range up to 300 kHz.

Structurally, dead-end couplings (1; 2;) are a cup-like plastic case having a rounded bottom on one side and an open cylindrical hole on the opposite side.

The splicing of the cable cores in such couplings is performed in an inefficient way by stripping the insulation of the cores, followed by twisting and soldering of the stripped and twisted cores, by insulating the spliced cores with polyethylene sleeves (sections of PE tubes, or dead-end sleeves plugged at one end).

The spliced core of two cables is installed in a cup-like case and poured with bitumen compound preheated to a temperature of 120 ° C.

A disadvantage of the design of the known couplings (1; 2; 3) is that in these couplings there is no screen of the intergrowth of conductors electrically connected to the screens of the spliced cables, and therefore high-frequency cables operating in the frequency range above 300 kHz cannot be spliced by such couplings. to. at high frequencies, the loss of electromagnetic radiation is significantly increased and the cable's immunity to electromagnetic fields is reduced. Structural disadvantages of such couplings also include twisting of copper conductors with soldering and insulating them with polyethylene sleeves in an inefficient way, as well as the fact that the completed splice is filled in the coupling with a preheated sealant based on bitumen compound.

The objective of the invention is to expand the functionality of the coupling through the use of sealed connectors, splicing copper insulated cores of the cable core without first manually stripping the insulated cores of the cable, through the use of a mesh screen for a spliced core of the cable - the use of a copper screen stocking, securely connected to the screens of the spliced ends of the cable SCS , and pouring a splice of the core of the cable shielded with a mesh copper stocking in a dead end sleeve using polyurethane VILAD-13 cold curing sealer, which significantly reduces the pouring time of the coupling.

The specified technical result is achieved by the fact that the proposed dead end coupling of the communication cable containing a cup-like plastic case having a rounded bottom on one side and an open cylindrical hole on the opposite side, the splice of the wires of the splice ends of the cables, sealed with sealant in the sleeve housing, contains splice of copper insulated conductors, made by sealed UY-2 connectors having a hydrophobic aggregate inside, while the intergrowths of the veins are inside the mesh screen made in Idea of a copper mesh stocking, which is reliably electrically connected to the shields of the splice ends of the communication cable by wrapping the copper screen stocking with shielded tinned copper cable wires and filling in the splice of the cable core shielded with a mesh copper stocking in a dead-end sleeve using VILAD-13 polyurethane sealant of cold curing, the inner space of the coupling, including penetrated through a metal mesh screen to the copper conductors spliced by the connectors and tightly sealed the space between the cores and the connectors.

Additionally, it can be noted that in a dead end sleeve for a shielded cable of structured cable networks (for example, EX-HVPVE cable, manufactured in the following design options: single-pair, two-pair, three-pair, four-pair and five-pair), individual sealed connectors (having inside hydrophobic aggregate) of the UY-2 type, connecting one insulated core from different ends of the cable by cutting through the polyethylene insulation of the wires and cutting the copper wires themselves silt-like contact, the core with intergrowths is shielded with a metal (copper) mesh stocking, one end of which is bent (plugged), and the other end is worn on the screens of spliced cables, while the metal screen tapes (for example, aluminum-polyethylene) of the cable are turned so that the metal the side of the tapes (without a sprayed polyethylene layer) is located outside and a metal (copper) screen (stocking) is pulled over this surface, while the electrically mesh screen is connected to the cable screen using a winding tinned wire under the shields of the connected cables.

A shielded splice of the spliced ends of the cables is installed in the coupling body and filled with a VILAD-13 two-component self-hardening polyurethane sealant, while the sealant, penetrating through the metal mesh screen, reliably seals the space between the cores and the core connectors.

The invention is illustrated by drawings, where:

figure 1 shows a General view of the mounted dead end coupling on the cable type EX-GVPVE;

figure 2 shows a General view of the housing of dead-end couplings (MT-45, MT-36, MT-16) for various types of cables EX-GVVVE;

figure 3 shows a General view of the connector of the veins of the UY-2 type, in which there are: a housing, a contact element, a hydrophobic filler, a cover;

figure 4 shows the crimping of the connector type UY-2 on the spliced core;

figure 5 shows the distribution of the connectors on the cables EX-GVPVE of various capacities;

figure 6 shows a General view of the splice of veins with a mesh (copper) screen before installation in the housing of the blind coupling and filling it with polyurethane sealant VILAD-13.

The mounted dead end sleeve on the EX-HVPVE high-frequency cable consists of a cup-like plastic case 1, in which splices of polyethylene insulated copper cores are installed, made using connectors 2 (type UY-2), while the splices of cores are located inside the screen metal mesh stocking 3, which it is electrically connected to the shields of the spliced ends of the cable EX-GVVVE by means of a winding under the screen of tinned copper wire 4, while the splices lived in a metal (copper) shielding mesh stocking polyurethane self-hardening after pouring sealant 5 VILAD-13.

The connector type "UY-2" is made in the form of a housing 6 filled with a hydrophobic aggregate, a contact element 7 and a cover 8.

The installation of a dead end coupling is as follows.

After laying out with a permissible bending radius of the spliced ends of the cables in the pit, the installation location of the coupling is planned; cut the ends of the cables at the marked location. At the spliced ends of the EX-HVPE cable, pre-cut according to a specific pattern — with the outer sheath removed, a cable aluminum screen left for a certain length with tinned copper screen wire tinned and insulated wires (pre-wiped from hydrophobic filler) freed up at a certain length, they are made using UY-2 connectors splices veins. When merging the cores, their twisting is not violated along the entire length to the connector. The connector is mounted on the spliced core of the pair and crimped with E9Y press tongs. The merging of the second core in a pair is made in the same place. If the cable has two pairs, then the following connectors are placed at a distance of 60 mm from the first. With a large number of pairs, the connectors are evenly spaced 30 mm apart. Then the screen is restored over the splices of veins. For this, a metal (copper) mesh screen (stocking) is pushed onto the splices of the cores and onto the screen tapes of the cable, previously turned out by the metal (aluminum) surface. Sub-screen tinned copper wires are pushed through the cells of the screen mesh and secured (wrapped) by these wires screen tapes around the cable, the ends of the wires are twisted together; the screen metal mesh is pulled and bent or crimped at the end of the splice. Then, a strip of the screen remaining from the cable cut is applied in 2-3 turns on the screen grid at the place of the shroud of their tinned copper wire shielding, while the screen tape is laid with the aluminum surface down. A bandage of 3-4 turns of copper wire is applied over the screen tape. After this, a shielded spliced core is installed in the coupling body so that the extreme splice connector does not reach the bottom of the housing by 10-15 mm and is filled with VILAD-13 liquid polyurethane sealant pre-prepared (mixed from two components), which hardens in 20-30 minutes by tightly sealing the coupling.

Used Books:

1. “Instructions for the installation of symmetric high-frequency cables of the ZK 1 × 4 × 1.2 type with bituminous compounds”, TsNIIS, LONIIS, Moscow, 1978. The instruction was approved by GUVMTS on 07.25.1978.

2. “Temporary recommendations for the installation of single-core cables KSPP and HTSC method of compound casting”, the Ministry of communications of the USSR, Moscow 1973

Claims (1)

A dead end coupling of a communication cable containing a cup-like plastic case having a rounded bottom on one side and an open cylindrical hole on the opposite side, a spliced core of the spliced ends of the cables, sealed with sealant in the sleeve housing, characterized in that the splices of the copper insulated cores are made of sealed UY connectors -2 ", having a hydrophobic filler inside, the splices of the veins are inside the mesh screen, made in the form of a copper mesh stocking, electrically connected to the screens the cable ends of structured cable networks by wrapping the stocking with shielded tinned copper cable wires, and pouring the splice of the cable core shielded with a mesh copper stocking in a dead end sleeve using cold-cured polyurethane sealant VILAD-13, which reliably seals the inner space of the sleeve, including penetrated metal shield to copper conductors spliced by connectors, and sealed the space between the conductors and connectors.

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