RU207280U1 - FIELD ELECTRIC COMMUNICATION CABLE - Google Patents

Abstract

The utility model relates to telecommunication technology and can be used as a field cable for building field communication lines, remote control lines for medium-power radio stations, four- and two-wire subscriber lines, intended for operation in field conditions on the ground surface, in the ground and suspension on local subjects, as well as in stationary conditions.

The technical result consists in increasing the security of cable chains from mutual influences between them and the throughput of cable communication lines organized with its help. For this, the cable contains six insulated conductive cores, each of which is made of multi-wire and consists of tinned copper wires, a screen made of aluminum foil with a polymer coating, one contact tinned copper wire, two windings made of polyethylene terephthalate (PET) film, a sheath made of polyethylene composition , a distinctive cotton thread, a load-carrying element and a protective hose made of frost-resistant and light-heat-resistant polyvinyl chloride plastic compound, as well as additionally introduced a second screen made of polymer-coated aluminum foil, a second contact tinned copper wire, while four of the six conductive cores are twisted in pairs with different (mismatched ) relative to each other in steps of twisting pairs, forming a "twisted pair", and the first two oppositely located conductive cores of four form the first twisted shielded working pair, the third and fourth conductive cores form the second twisted shielded a working pair, each working pair is placed in a screen of aluminum foil with a nominal thickness of at least 0.1 mm with a polymer coating, the fifth and sixth conductors form a service pair, the conductive conductors of the service pair are symmetrically located in the recesses between the screened working pairs, over the screens of the working pairs in the longitudinal direction, two tinned copper contact wires with a nominal diameter of not more than 0.23 mm are laid, a distinctive cotton thread is placed next to one of the conductive conductors of the service pair, two twisted shielded working pairs and two conductive conductors of the service pair, forming the cable core, and carrying an element made of four bundles of high-modulus industrial yarns are placed in the first winding made of PET film, on top of which a sheath made of polyethylene composition is applied, on top of which a second winding made of PET film is applied, on top of which a protective hose made of frost-resistant and light-heat-resistant polyvinyl chloride is applied rubber with a nominal thickness of 1.2 mm, while each of the four conductive conductors of the working pairs and two conductive conductors of the service pair consist of seven tinned copper wires with a nominal diameter of not more than 0.23 mm, twisted together, with a twisting pitch of not more than 14 mm, insulated with a continuous layer of low density polyethylene composition with a thickness of 0.45 mm.

Description

The utility model relates to telecommunication technology and can be used as a field cable for building field communication lines, remote control lines for medium-power radio stations, four- and two-wire subscriber lines, intended for operation in field conditions on the ground surface, in the ground and suspension on local subjects, as well as in stationary conditions.

Known electrical wire (cable), the design and technical capabilities of which are described in the utility model patent No. 67323 U1 [1]. This cable contains several, at least three conductive cores, each of which is made of multi-wire and consists of tinned copper wires, a screen made of copper wires, and a sheath, under which the screen is located, while the insulation of the conductive cores and the sheath are made of polyvinyl chloride lead-free plastic compound.

The main disadvantages of the known cable are the insufficient number of conductive cores, the large mutual influence of the signals transmitted through them on each other and the sharp dependence of its electrical properties and technical parameters on weather conditions ("dry", "wet"), which limits the possibility of using such a cable for deployment separate subscriber and connecting lines of communication in the field.

The closest in technical essence to the proposed utility model is the field electric communication cable selected as a prototype, the design and technical capabilities of which are described in the RF patent for utility model No. 182154 U1 dated 06.08.2018, IPC Н01В 11/02. Published in BIPM # 22, 2018 [2].

The prototype field electric communication cable contains six conductive cores, each of which is made of multi-wire and consists of tinned copper wires, a screen made of aluminum foil, a sheath made of polyethylene composition, one contact tinned copper wire, four windings made of polyethylene terephthalate (PET) film, cotton thread, a load-carrying element made in the form of a braid of twenty-four high-modulus technical threads and a protective hose made of frost-resistant and light-heat-resistant polyvinyl chloride plastic compound, while four of the six conductive conductors are twisted into a star four with a twist pitch of no more than 65 mm, and the opposite conductive conductors are located in the four form a working pair, and the other two conductive conductors form a service pair, the conductive conductors of the four are placed in the first PET film winding, on top of which one contact tinned copper wire with a nominal diameter of not more than 0.23 mm is applied, on top of the of the active wire, a screen of aluminum foil with a nominal thickness of at least 0.1 mm and a width of not more than 9.0 mm is applied, a second PET film winding with a total nominal thickness of at least 0.2 mm is superimposed over the screen, the service conductors are located diametrically opposite relative to the axis of the four, a cotton thread is placed next to one of the service conductive conductors, a four of insulated conductive conductors and two service conductive conductors form a cable core placed in a sheath made of polyethylene composition with a nominal thickness of 0.7 mm, on top of which a load-carrying element made in the form a braid of twenty-four high-modulus technical threads, a fourth winding of PET film is applied over the load-carrying element, the cable is placed in a protective hose made of frost-resistant and light-heat-resistant PVC compound with a nominal thickness of 1.2 mm, while each of the six conductive cores consists of seven twisted together,with a twist pitch of no more than 14 mm, tinned copper wires with a nominal diameter of no more than 0.23 mm, insulated with a continuous layer of low density polyethylene composition 0.45 mm thick for working pairs and 0.25 mm thick for a service pair, the space inside the four conductive the cores are filled with low density polyethylene insulation.

The main disadvantages of the cable according to the prototype are in the constructive implementation of working pairs, where a "star" twisting of fours of insulated conductive conductors with a constant pitch is used, which does not allow providing the required values of the parameters of protection against mutual influences between the cable circuits when transmitting information at increased speeds and the required communication ranges ...

The purpose of the utility model is to increase the security of cable circuits from mutual influences between them and the throughput of cable communication lines organized with its help.

This goal is achieved by the fact that in a field electric communication cable containing six insulated conductive cores, each of which is made of multi-wire and consists of tinned copper wires, a screen made of aluminum foil with a polymer coating, one contact tinned copper wire, two windings of polyethylene terephthalate (PET) films, a sheath made of polyethylene composition, a distinctive cotton thread, a load-carrying element and a protective hose made of frost-resistant and light-heat-resistant polyvinyl chloride plastic compound, a second screen made of polymer-coated aluminum foil is additionally introduced, a second contact tinned copper wire, with four of six conductive conductors twisted by paired twisting with different mismatched in size and direction relative to each other twisting steps of pairs, the size of which is selected in the range from 45 to 65 mm, forming a "twisted pair", and the first two oppositely located conductive cores of four ex form the first twisted shielded working pair with a twisting pitch of 45 mm, the third and fourth conductors form the second twisted shielded working pair with a twisting pitch of 65 mm, each working pair is placed in a screen of aluminum foil with a nominal thickness of at least 0.1 mm with a polymer coating , the fifth and sixth conductive conductors form a service pair, the conductive conductors of the service pair are symmetrically located in the recesses between the shielded working pairs, two tinned copper contact wires with a nominal diameter of not more than 0.23 mm are laid over the screens of the working pairs in the longitudinal direction, next to one of the of conductive conductors of the service pair, a distinctive cotton thread is placed, two twisted shielded working pairs and two conductive conductors of the service pair, forming the cable core, and a load-carrying element made of four bundles of high-modulus technical threads, are placed in the first PET film winding, on top of which a sheath of lump position of polyethylene, on top of which a second winding made of PET film is applied, on top of which a protective hose made of frost-resistant and light-heat-resistant PVC compound with a nominal thickness of 1.2 mm is applied, while each of the four conductive conductors of working pairs and two conductive conductors of a service pair consists of seven twisted between by itself, with a twisting pitch of not more than 14 mm, tinned copper wires with a nominal diameter of not more than 0.23 mm, insulated with a continuous layer of a low density polyethylene composition with a thickness of 0.45 mm.

Comparable analysis with the prototype shows that the proposed field electric communication cable is distinguished by the presence of new features, namely: the second screen made of aluminum foil, the second contact tinned copper wire, the constructive implementation of the conductive cores of the working pairs of the cable using a design based on the use of a steam room (instead of a quadruple) twisting of insulated conductive conductors with different mismatched in size and direction relative to each other in the twisting steps of pairs, the size of which is selected in the range from 45 to 65 mm, according to the "twisted pair" type, placing each working pair in an aluminum foil screen and symmetrical arrangement of service conductive lived in the recesses between the shielded working pairs, the implementation of the load-carrying element from four bundles of high-modulus technical threads, which made it possible to increase the protection of the cable chains from mutual influences between them and increase the communication range when transmitting information with a high their speeds.

Thus, the proposed utility model meets the "state of the art" criterion, and the use of known conductive and insulating materials for cable production confirms the possibility of practical implementation and industrial applicability of a field electric communication cable.

The drawing shows the design of the proposed field electrical communication cable, which is marked:

1 - insulated conductive core (TPZh) of working pairs;

2 - screen made of aluminum foil with a polymer coating of the first working pair;

3 - the first twisted shielded working pair;

4 - screen made of aluminum foil with a polymer coating of the second working pair;

5 - the second twisted shielded working pair;

6 - the first contact tinned copper wire;

7 - the second contact tinned copper wire;

8 - insulated conductive core of the service pair;

9 - cable core;

10 - load-carrying element made of four bundles of high-modulus technical threads;

11 - the first winding made of polyethylene terephthalate (PET) film;

12 - shell made of polyethylene composition;

13 - the second PET film wrapping;

14 - distinctive cotton thread;

15 - protective hose made of frost-resistant and light-heat resistant PVC compound.

The field electrical communication cable contains four insulated conductive cores (TPV) 1 working pairs, twisted in paired twisting with different mismatched in size and direction relative to each other in twisting steps of pairs, the size of which is selected in the range from 45 to 65 mm, with the first two oppositely located conductive cores 1 of four form the first 3 twisted shielded working pair with a twisting pitch of 45 mm, placed in a screen 2 of aluminum foil with a nominal thickness of at least 0.1 mm with a polymer coating. The third and fourth oppositely located conductive cores 1 form the second 5 twisted shielded working pair with a twisting pitch of 65 mm, placed in a screen 4 of aluminum foil with a nominal thickness of at least 0.1 mm with a polymer coating.

The fifth and sixth insulated conductors are conductive conductors 8 of the service pair. The conductive cores 8 of the service pair are symmetrically located in the recesses between the first 3 and the second 5 shielded working pairs. On top of the screen 2 of the first twisted screened working pair 3 and the screen 4 of the second twisted screened working pair 5 in the longitudinal direction, respectively, the first 6 and the second 7 contact copper tinned wires are laid. A distinctive cotton thread 14 is placed next to one of the conductive conductors 8 of the service pair. The first 3 and second 5 twisted shielded working pairs and two conductive conductors 8 of the service pair form the core of the cable 9. The load-carrying element 10 is made of four bundles of high-modulus technical threads. The cable core 9 and the load-carrying element 10 are placed in the first winding 11 made of PET film, on top of which a sheath 12 made of polyethylene composition is applied, on top of which a second winding 13 made of PET film is applied, on top of which is applied a hose 15 made of frost-resistant and light-heat-resistant PVC compound with a nominal thickness of 1, 2 mm.

Each of the four insulated conductive conductors 1 of the first 3 and second 5 twisted shielded working pairs and two insulated conductive conductors 8 of the service pair are made multi-wire, consist of seven twisted together, with a twisting pitch of no more than 14 mm, soft copper wires with a nominal diameter of no more than 0 , 23 mm, insulated with a continuous layer of a composition of low density polyethylene with a thickness of 0.45 mm.

As copper wires for insulated conductive conductors 1 working pairs and insulated conductive conductors 8 of a service pair, soft copper wire of the MM grade according to GOST 2112-79 or tinned copper wire according to TU 16.505.850-75 can be used.

Insulation of conductive conductors of 1 working pair and conductive conductors of 8 service pair is made using polyethylene composition of grades 102-01K - 102-05K and 153-01K - 153-05K, grade 1 according to GOST 16336-2013. In this case, the choice of the size of the twisting steps of the insulated conductive conductors 1 of the working pairs 3, 5 and the conductive conductors 8 of the service pair is made according to the criterion of maximum weakening of mutual influences.

Screens 2 and 4 are made in the form of a winding with a gap of not more than 25% with a contact conductor made of tinned copper wire. As an aluminum foil for screens 2 and 4, a soft aluminum foil of grade A5 in accordance with GOST 25905-2018 can be used.

Screens 2 and 4 of working pairs are designed to protect against external and internal electromagnetic influences during the transmission of information along the conductive conductors of the cable.

The first 6 and the second 7 contact tinned copper wires can be made using soft copper wires with a nominal diameter of 0.23 mm, grade MM according to GOST 2112-79 or TU 16.505.850-75.

The arrangement of the core 9 is made on the basis of the use of a pair of twisting. The pitch of twisting of the core 9 is taken to be within 110. In this case, the direction of twisting of the core 9 should be opposite to the direction of twisting of the working pairs of the cable. The twisting steps of the working pairs must be different both from one another and from the pitch of the core 9. The twisting steps of the working pairs are taken to be equal in the range from 45 to 65 mm.

Load-carrying element 10 is made of four bundles of high-modulus technical threads NSVM-58.8 in accordance with GOST 28007-88.

As a polyethylene terephthalate film for the first 10 and second 12 windings, a film of grade E in accordance with GOST 24234-80 can be used.

For the shell 11 made of polyethylene composition, a polyethylene film of Tc grade in accordance with GOST 10354-82 can be used.

The distinctive cotton thread 14 is made using cotton threads in accordance with GOST 6309-93 and is intended to determine the numbers of the conductive cores of the cable.

Protective hose 15 can be made using PVC compound grade 0-55 in accordance with GOST 5960-72.

The protective PVC hose 15 is waterproof and protects the field electric communication cable from various external influences, including solar radiation, low temperatures, rain, frost and dew. The thickness of the protective hose 14 is at least 1.2 mm.

To increase the ease of use and operation, the field electric communication cable is made with construction lengths of 50, 100 and 200 meters, while both ends of the construction length of the cable are reinforced with connecting cable half couplings (PC), which provide connections between the construction lengths of cables of the same brand in any sequence, as well as with accessories for the intended purpose. In this case, conductive conductors and a screen must be brought out to the contacts of the half-couplings.

An 8P8C (RJ45) type connector in a protected case can be used as a promising connector, since such connectors introduce the least loss.

Cable half-couplings provide an unambiguous connection of the building lengths of cables into a cable line in any sequence while maintaining the constancy of the number of contacts of the working pair along the entire length of the line for any number of building lengths. By joining the building lengths of the cable, the continuity of the shield circuit of the cable line is ensured.

In the inoperative position, the building lengths of the proposed field electric communication cable are usually located on a drum having a device for its deployment in the field, which contributes to the convenience of cable deployment and an increase in the speed of laying communication lines.

The technical effect of the proposed utility model is to increase the protection of cable chains from mutual influences between them, to increase the crosstalk attenuation at the near end between cable pairs and security at the far end, the throughput of cable communication lines organized with its help, to ensure the possibility of operating the cable in different climatic conditions achieved by introducing a second screen made of aluminum foil, pairing the insulated conductive conductors in two shielded working pairs and using a pair (instead of a quadruple) twisting of insulated conductive conductors with different mismatched in magnitude and direction relative to each other, the twisting steps of the pairs, the value which is selected in the range from 45 to 65 mm, according to the "twisted pair" type, by placing each working pair in an aluminum foil screen and symmetrical arrangement of service conductors in the recesses between the screened working pairs, making a core cable with different twisting steps in relation to the twisting of working pairs and a load-carrying element from four bundles of high-modulus technical threads.

In addition, the proposed communication cable provides an increase in the protection of information transmitted through it from transient influences between cable pairs and from external interference by placing working pairs in aluminum foil screens. At the same time, in the proposed utility model, the crosstalk attenuation at the near end between the working pairs of the cable at a frequency of 100 MHz over a length of 100 m is not less than 60 dB, which is significantly higher than the indicators in similar cables (43 dB), including in the prototype. Hence, it follows that the throughput increases and the communication range through cable communication lines, organized with the help of the proposed cable, increases. This provides the ability to transmit (receive) information at a rate of 2048 kbit / s.

Tests of prototypes of the proposed field electric communication cable have shown that it provides multiple deployment (folding) of communication lines in the field, reliable operation at ambient temperatures from minus 50 to plus 55 degrees and exposure to moisture.

Sources of information.

1. RU, patent No. 67323 U1, IPC Н01В 7/00, Н01В 9/00, Н01В 11/00, BIPM No. 28 dated 10.10.2007.

2. RU, utility model patent No. 182154 U1, IPC Н01В 11/02, BIPM No. 22 dated 06/08/2018 (prototype).

3. Grodnev I.I., Vernik S.M. Communication lines: Textbook for universities. - 5th ed., Rev. and add. - M .: Radio and communication, 1988, p. 243-258, 522-525.

Claims (4)

1. Field electrical communication cable containing six insulated conductive cores, each of which is made of multi-wire and consists of tinned copper wires, a screen made of polymer-coated aluminum foil, one contact tinned copper wire, two windings of polyethylene terephthalate (PET) film, a sheath made of a polyethylene composition, a load-carrying element and a protective hose made of frost-resistant and light-heat-resistant polyvinyl chloride plastic compound, characterized in that a second screen made of aluminum foil with a polymer coating, a second contact tinned copper wire, four of the six conductive cores are twisted in pairs with different mismatched in size and direction relative to each other twisting steps of pairs, the value of which is selected in the range from 45 to 65 mm, forming a "twisted pair", and the first two oppositely located insulated conductors of four form the first twisted screen a twisted working pair with a twisting pitch of 45 mm, the third and fourth insulated conductive conductors form a second twisted shielded working pair with a twisting pitch of 65 mm, each working pair is placed in a screen of aluminum foil with a nominal thickness of at least 0.1 mm with a polymer coating, the fifth and the sixth conductive conductors form a service pair, the insulated conductive conductors of the service pair are symmetrically located in the recesses between the shielded working pairs, two tinned copper contact wires with a nominal diameter of not more than 0.23 mm are laid over the screens of the working pairs in the longitudinal direction, two twisted shielded working pairs and two conductive conductors of the service pair, forming the cable core, and the load-carrying element made of four bundles of high-modulus technical threads, are placed in the first PET film winding, on top of which a sheath made of a polyethylene composition is applied, on top of which a second PET film winding is applied, on top of which is applied s A protective hose made of frost-resistant and light-heat resistant PVC compound with a nominal thickness of 1.2 mm, while each of the four conductive conductors of working pairs and two conductive conductors of a service pair consist of seven tinned copper wires with a nominal diameter no more than 0.23 mm, insulated with a continuous layer of a composition of low density polyethylene with a thickness of 0.45 mm. 2. Communication cable according to claim 1, characterized in that as copper wires of current-carrying conductors, copper soft wire of the MM brand can be used, while copper wires can be made in an outer layer. 3. Communication cable according to claim 1, characterized in that the insulation of the conductive cores of the cable is made using a polyethylene composition of grades 102-01K - 102-05K and 153-01K - 153-05K, grade 1. 4. The communication cable according to claim 1, characterized in that, to improve the ease of use and operation, the field electric communication cable is made with construction lengths of 50, 100 and 200 meters, while both ends of the construction length of the cable are reinforced with connecting half couplings of the 8P8C type, which provide connections among themselves the building lengths of cables of the same brand in any sequence, as well as with components for their intended purpose.

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