RU198512U9 - Power cable for electrified transport networks - Google Patents

Abstract

The declared utility model relates to cable technology, namely to the structures of power cables intended for the transmission and distribution of electrical energy in stationary installations with direct current, for example, in electrified transport networks. The task is achieved by the fact that the power cable contains one multi-wire conductive core, over which is a layer of insulation, an inner shell, an outer shell, a first metal screen is located above the insulation, and a second metal screen is located above the inner shell, which provide protection against interference and prompt operation of protective devices. The technical result achieved when implementing the claimed utility model is increased operational characteristics, which is ensured by the use of two screens in the design, which protect the cable line from external electromagnetic interference, electrical corrosion and reduce the emission of interference from the cable itself, and also allow t remove voltage from the cable before a short circuit occurs. 17 p.p. f-crystals, 1 fig.

Description

Technology area

The claimed utility model relates to cable technology, namely, to the structures of power cables intended for the transmission and distribution of electrical energy in stationary installations with direct current, for example, in electrified transport networks.

State of the art

Known is a combined power cable for constant voltage containing one main multi-wire conductive core made of copper or aluminum, on which phase insulation and an outer sheath are sequentially applied by extrusion, in the outer layer of the main multi-wire conductive core there are additional isolated control single-wire or multi-wire copper or aluminum conductive there are one or more conductors, while the phase insulation of the main multi-wire conductor is made of cross-linked polyethylene, the insulation of the control single-wire or multi-wire copper or aluminum conductors is made of a polymer composition by extrusion, an extruded inner sheath is additionally applied over the phase insulation of the main multi-wire conductor, made of a polyvinyl chloride composition, armor made in the form of a winding of two steel tapes superimposed with overlapping and outer A tight sheath made of polyethylene (see. RF patent for utility model No. 137419 dated 04/29/2013 published 02/10/2014 cl. Н01В 9/00) by a set of features, taken as the closest analogue of a utility model.

The known cable model does not fully meet the requirements for protecting the cable and electrical equipment connected to the cable line from intense corrosion, stray currents generated by nearby cables or high-frequency devices and powerful electromagnetic radiation arising from a sharp change in the current of the traction motor of the rolling stock.

The reason preventing the technical result from the known cable design is the absence of protective screens that provide protection against interference and prompt operation of protective devices and voltage removal from the cable before a short circuit occurs.

The essence of the utility model

The problem to be solved by the claimed utility model is to design a power cable with improved performance characteristics that prevent intense corrosion, provide resistance to stray currents, electromagnetic radiation, and also remove voltage from the cable before a short circuit occurs.

The task is achieved by the fact that the power cable contains one multi-wire conductive core, on top of which there is an insulation layer, an inner sheath, an outer sheath, a first metal screen is located on top of the insulation, and a second metal screen is located on top of the inner sheath, which provide protection against interference and prompt operation protective devices.

In addition, in the particular case of a utility model implementation:

- the conductor can be made of copper, aluminum or aluminum alloy;

- an optical sensor can be located anywhere in the conductor;

- at any place of the current-carrying conductor, at least one insulated control conductor may be located;

- a thermal barrier can be applied over the main conductor;

- the structure may contain water-blocking elements anywhere in the form of powder, threads or tape wrapping;

- the first or second metal screens can be made by wrapping from an aluminum, or alumopolymer, or aluminum alloy tape;

- the first or second metal screens can be made of aluminum wires or aluminum alloy wires;

- the first or second metal screens can be made of copper wire;

- the second metal shield can be made in the form of a solid aluminum tube;

- insulation of the main conductive and control core can be made of ethylene-propylene rubber;

- insulation of the main current-carrying and control core can be made of cross-linked polyethylene;

- armor and a protective hose can be applied over the outer shell;

- the inner sheath, the outer sheath and the protective hose can be made of a halogen-free polymer composition;

- the inner sheath, the outer sheath and the protective hose can be made of a polyvinyl chloride composition with reduced smoke and gas emission with an oxygen index of at least 32;

- outer sheath and protective hose can be made of polyvinyl chloride plastic;

- outer sheath and protective hose can be made of polyethylene;

- armor can be made of galvanized steel wires or strips.

The technical result achieved during the implementation of the claimed utility model is to increase the operational characteristics, which is ensured by the use of two screens in the structure, which protect the cable line from external electromagnetic interference, electrical corrosion and reduce the emission of interference from the cable itself, and also allow to remove voltage from the cable before a short circuit occurs.

The proposed utility model is illustrated by a specific example of implementation and illustrated by the drawings, which show the cross-section of the cable.

FIG. 1 shows a power cable with two metal screens in section according to claim 1 of the utility model formula.

The power cable for electrified transport in DC networks contains one main multi-wire conductive core (1), insulation (2), an inner sheath (3), an outer sheath (4), the first metal screen (5), the second metal screen (6).

In addition, an optical sensor can be located in the center or in the bundles of wires of the main conductive core.

In addition, a control core can be located in the strands of wires of the main conductive core.

In addition, a thermal barrier made of flame retardant tapes can be placed over the main conductor.

In addition, water-blocking elements in the form of powder, threads or tapes can be located in the folds of the main conductive core and cable structure.

In addition, layers of armor and a protective hose can be placed over the outer shell.

The manufacturing technology of a power cable for an electrified, declared model includes the following operations, confirming the industrial applicability of the declared utility model.

The conductive and control cores are made, as a rule, by methods known in the cable industry.

A fire-resistant barrier is applied over the current-carrying core using the winding method.

Insulation is applied over the conductive or control core by extrusion.

The metal screen is applied by winding on insulating or armored vehicles in a known manner.

The application of an aluminum tube can be realized on an aluminum press of the "P-6043" type.

The inner sheath, the outer sheath and the protective hose are extruded.

Armor is applied to armored vehicles.

As a result of the search conducted in patent and scientific and technical sources, no solutions were found containing the entire set of essential features of an independent claim of a utility model, which allows us to conclude that the claimed utility model meets the "novelty" criterion of patentability.

Claims (18)

1. A power cable for electrified transport in DC networks contains one main multi-wire conductive core (1), on which insulation (2), an inner sheath (3), an outer sheath (4), is sequentially applied by extrusion, characterized in that on top of the insulation the conductive core is the first metal screen (5), over the inner shell is the second metal screen (6). 2. A cable according to claim 1, characterized in that the conductor can be made of copper, aluminum or aluminum alloy. 3. Cable according to claim 1, characterized in that at least one optical sensor (7) can be located in the center or in the twists of the wires of the conductive core, which allows real-time determination of changes in temperature, acoustic background and deformation. 4. A cable according to claim 1, characterized in that at least one control core can be located in the twisted wires of the conductive core. 5. A cable according to claim 1, characterized in that a thermal barrier made of fire-resistant tapes can be applied over the main conductor or inner sheath. 6. A cable according to claim 1, characterized in that the structure may contain water-blocking elements anywhere in the form of powder, threads or tape windings. 7. A cable according to claim 1, characterized in that the first or second metal screens can be made by winding from an aluminum, alumopolymer or aluminum alloy tape. 8. Cable according to claim 1, characterized in that the first or second metal screens can be made of an aluminum or aluminum alloy wire. 9. Cable according to claim 1, characterized in that the first or second metal screens can be made of copper tapes or wires. 10. A cable according to claim 1, characterized in that the second metal shield can be made in the form of a one-piece aluminum tube. 11. Cable according to PP. 1 and 4, characterized in that the insulation of the main conductive and control core is made of ethylene-propylene rubber. 12. Cable according to PP. 1 and 4, characterized in that the insulation of the main conductive and control core is made of cross-linked polyethylene. 13. A cable according to claim 1, characterized in that layers of armor and a protective hose can be sequentially applied over the outer sheath. 14. Cable according to PP. 1 and 13, characterized in that the inner sheath, the outer sheath and the protective hose can be made of a halogen-free polymer composition. 15. Cable according to PP. 1 and 13, characterized in that the inner casing, the outer casing and the protective hose can be made of a polyvinyl chloride composition with reduced smoke and gas emission with an oxygen index of at least 32. 16. Cable according to PP. 1 and 13, characterized in that the inner sheath, or the outer sheath, or the protective hose can be made of polyvinyl chloride plastic. 17. Cable according to PP. 1 and 13, characterized in that the outer sheath or the protective hose can be made of polyethylene. 18. Cable according to claim 13, characterized in that the armor is made of galvanized steel wires or strips.

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