CN216145435U - Railway through ground wire - Google Patents

Abstract

The soil junction layer has conductivity and a net-shaped surface, increases the contact area with soil, is beneficial to improving the binding property of the railway through ground wire and the soil, reduces the ground resistance of the railway through ground wire, and improves the heat dissipation capacity.

Description

Railway through ground wire

Technical Field

The application belongs to the technical field of electrified railways, and particularly relates to a railway through ground wire.

Background

China has attracted attention in railway construction and achieves good results. With the increase of the mileage of the high-speed railway, the safe and good operation of the railway power supply system cannot be paid high attention. As a 27.5kV power distribution network of the high-speed railway, the power distribution network provides power guarantee for traffic signal equipment, communication equipment, station production, life and water supply systems and the like along the high-speed railway. Whether the fault can be isolated and removed in time when the system power supply line has a fault is related to the operation safety of the railway.

The railway through ground wire has the characteristics of long line, complex laying environment, high current load and the like.

The existing railway through ground wire has the problems that the ground resistance is large due to weak bonding with soil, the surface heat dissipation of the railway through ground wire is poor, the rigidity is too strong, and the laying construction is not facilitated.

SUMMERY OF THE UTILITY MODEL

The application aims to provide a railway through ground wire and aims to solve the problems that the traditional railway through ground wire is poor in binding property with soil, so that the ground resistance is large, and the surface heat dissipation is not good.

The first aspect of the embodiment of the application provides a railway through ground wire, which comprises at least one anticorrosion return wire and a soil bonding layer, wherein the soil bonding layer coats the anticorrosion return wire and is conductive and provided with a net-shaped surface.

In one embodiment, the anti-corrosion return line comprises a core and a soil junction layer, wherein the core is arranged between the anti-corrosion return line and the soil junction layer, and the anti-corrosion return line is arranged between the core and the soil junction layer.

In one embodiment, the tensile reinforcement wire comprises a carbon fiber wire or a steel wire.

In one embodiment, the anti-corrosion return line comprises a metal wire, a conductive isolation layer coated outside the metal wire, and a conductive protection layer coated outside the conductive isolation layer, wherein the conductive isolation layer is isolated from electrolyte outside the metal wire, and the conductive protection layer is used for protecting the conductive isolation layer from being damaged by external force.

In one embodiment, the conductive isolation layer comprises a film layer made of a high polymer material through conductivity modification, and the conductive protection layer comprises graphite.

In one embodiment, the film layer is a viscose doped and modified by carbon nanotubes.

In one embodiment, the soil-engaging layer is woven from a plurality of conductive, corrosion-resistant wires.

In one embodiment, the conductive corrosion-resistant wire is a flexible graphite wire harness.

In one embodiment, the railway through ground wire is filled with filler for expanding diameter.

In one embodiment, the filler is graphite.

In one embodiment, the system further comprises a signal wire for detecting whether the railway through ground wire is broken or not.

In one embodiment, the system further comprises an optical fiber for detecting the position of the break point of the railway through ground wire.

The soil junction layer of the railway through ground wire is provided with the net-shaped surface, so that the contact area between the soil junction layer and the soil is increased, the binding property between the railway through ground wire and the soil is improved, the grounding resistance of the railway through ground wire is reduced, and the heat dissipation capacity is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a railway through ground wire according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a railway through ground wire according to a second embodiment of the present application;

fig. 3 is a schematic structural diagram of a return line according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a railway through ground wire provided in the third embodiment of the present application;

fig. 5 is a schematic structural diagram of a railway through ground wire according to a fourth embodiment of the present application;

fig. 6 is a schematic structural diagram of a reflow line provided in the second embodiment of the present application;

fig. 7 is a schematic structural diagram of a railway through ground wire provided in the fifth embodiment of the present application;

fig. 8 is a schematic structural diagram of a railway through ground wire according to a sixth embodiment of the present application;

fig. 9 is a schematic structural diagram of a railway through ground wire according to a seventh embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Fig. 1 and fig. 2 show schematic structural diagrams of a railway through ground wire provided in two embodiments of the present application, and for convenience of description, only the parts related to the embodiments are shown, and detailed descriptions are as follows:

the railway through ground wire 10 comprises at least one anti-corrosion return wire 11 and a soil junction layer 12 which coats the anti-corrosion return wire 11, wherein the soil junction layer 12 is conductive and has a net-shaped surface, so that the contact area between the soil junction layer and the soil is increased, the improvement of the binding property of the railway through ground wire and the soil is facilitated, the grounding resistance of the railway through ground wire is reduced, and the heat dissipation capability is improved. In the embodiment of fig. 1, 1 anticorrosion return line 11 is adopted in the railway through ground wire 10, and a plurality of anticorrosion return lines 11 are adopted in the railway through ground wire 10 provided in fig. 2. The plurality of corrosion protection return wires 11 may be parallel to each other, woven, or twisted with each other.

Referring to fig. 3, the anti-corrosion return line 11 includes a metal wire 112, a conductive isolation layer 114 covering the metal wire 112, and a conductive protection layer 116 covering the conductive isolation layer 114, wherein the conductive isolation layer 114 isolates an electrolyte outside the metal wire 112, and the conductive protection layer 116 is used for protecting the conductive isolation layer 114 from being damaged by an external force.

The metal wire 112 in the anti-corrosion return line 11 may be a copper wire or an aluminum wire, or may be a plurality of copper wires or aluminum wires which are parallel to each other, woven, formed or twisted with each other, and when the metal wire 112 is a plurality of, the conductor with a large cross-sectional area is divided into a plurality of anti-corrosion return lines, so that the heat dissipation area of the conductor is increased.

The conductive isolation layer 114 is a film made of a polymer material with modified conductivity, such as a carbon nanotube-doped modified adhesive film, and completely covers the surface of the metal wire 112, so as to isolate the electrolyte in the soil from the metal wire 112, protect the metal wire 112 from electrolytic corrosion, and simultaneously, avoid the current in the metal wire 112 from being evacuated to the soil.

The conductive protection layer 116 is made of a conductive corrosion-resistant material, such as graphite, and completely covers the outer surface of the conductive isolation layer 114, so as to protect the conductive isolation layer 114 from being damaged by external force.

Referring to fig. 4 and 5, a tensile reinforcement wire 13 may be further disposed in the railway through ground wire 10, and the tensile reinforcement wire 13 is used as a core of the anti-corrosion return wire 11 and/or disposed between the anti-corrosion return wire 11 and the soil bonding layer 12, and is covered by the soil bonding layer 12. It can be understood that in the embodiments of fig. 4 and 6, the tensile reinforcement wire 13 is arranged in the metal wire 112 as a wire core to increase the tensile capacity of the single corrosion-resistant reflow wire 11. In the embodiment of fig. 5, the tensile reinforcement wire 13 may be independent of the corrosion-resistant return wire 11, and may be parallel to the corrosion-resistant return wire 11, woven or twisted to increase the tensile strength.

The tensile reinforcing wire 13 is made of a high-strength tensile material, such as carbon fiber, steel wire, etc., and is arranged in the anti-corrosion return wire 11 as a wire core, or is arranged between the anti-corrosion return wire 11 and the soil junction layer 12, and is arranged in parallel or in a twisted shape with the anti-corrosion return wire 11, specifically, 1 (see fig. 4) or a plurality of (see fig. 5) are arranged, so as to improve the tensile strength of the railway through ground wire 10.

The soil junction layer 12 is made of conductive corrosion-resistant materials, such as graphite, and is spirally wound in a weaving mode and mutually woven to form a tight net sleeve to completely wrap the corrosion-resistant return line 11 and the tensile reinforcing line 13. Optionally, the soil junction layer 12 is woven to form a mesh shape, so that the surface is beneficial to improving the binding property of the railway through ground wire 10 and the soil, reducing the grounding resistance of the railway through ground wire 10, and improving the heat dissipation capability.

Referring to fig. 7 to 9, the railway through ground wire 10 further includes optical fibers 14, the optical fibers 14 are disposed in the anti-corrosion return wire 11 as a core, or disposed in the tensile reinforcement wire 13 as a core, or disposed between the tensile reinforcement wire 13, the anti-corrosion return wire 11 and the soil bonding layer 12, and 1 optical fiber 14 is generally disposed, but several optical fibers may be disposed for detecting a position of a fracture point of the railway through ground wire 10.

Referring to fig. 7 to 9, the railroad feedthrough ground 10 further includes a signal line 15 made of an insulated conductive wire, such as a twisted pair. The signal wire 15 is arranged in the anti-corrosion return wire 11 as a wire core, or arranged in the tensile reinforcing wire 13 as a wire core, or arranged among the tensile reinforcing wire 13, the anti-corrosion return wire 11 and the soil junction layer 12, and is used for detecting whether the railway through ground wire 10 has a fracture condition. The number of signal lines 15 is generally 1 (see fig. 7), but may be several (see fig. 8 and 9).

Referring to fig. 9, optionally, in some embodiments, the railway through ground wire 10 further includes a filler 16 for expanding the diameter, and the filler 16 is made of a corrosion-resistant material, such as graphite, and is disposed between the soil-bonding layer 12 and the corrosion-resistant return wire 11 for increasing the outer diameter of the soil-bonding layer 12, thereby increasing the surface area of the soil-bonding layer 12, reducing the ground resistance of the railway through ground wire 10, and improving the heat dissipation capability. The filler 16 shown in fig. 9 is filled in the center axis of the railway feedthrough 10, alternatively, it may be filled in the edge.

In the application, the soil junction layer 12 adopts a weaving mode, and the conductor with a large cross section area is divided into a plurality of anti-corrosion return lines 11, so that the rigidity of the railway through ground wire 10 is reduced, and the laying construction is facilitated; in addition, the meshed surface formed by the weaving mode adopted by the soil junction layer 12 obviously increases the combination area of the through ground wire and the soil, thereby enhancing the combination property with the soil; in addition, the conductor with a large cross section area is divided into a plurality of anti-corrosion return lines 11, the heat dissipation area of the conductor is increased, the heat dissipation area of the railway through ground wire 10 and the soil is increased through the meshed soil junction layer 12, and the increase of the heat dissipation area is beneficial to improving the through.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims (12)

1. The railway through ground wire is characterized by comprising at least one anticorrosion return wire and a soil bonding layer for coating the anticorrosion return wire, wherein the soil bonding layer has conductivity and a net surface.

2. The railway feedthrough ground wire of claim 1, further comprising a tensile reinforcement wire as a core of the corrosion-resistant return wire and/or arranged between the corrosion-resistant return wire and the soil-bonding layer, being covered by the soil-bonding layer.

3. The railroad feedthrough ground wire of claim 2, wherein the tensile reinforcement wire comprises a carbon fiber wire or a steel wire.

4. The railway through ground wire of any one of claims 1 to 3, wherein the anti-corrosion return wire comprises a metal wire, a conductive isolation layer coated outside the metal wire, and a conductive protection layer coated outside the conductive isolation layer, wherein the conductive isolation layer isolates electrolyte outside the metal wire, and the conductive protection layer is used for protecting the conductive isolation layer from external force damage.

5. The railroad feedthrough ground of claim 4, wherein the conductive isolation layer comprises a film of a polymer material modified for conductivity, and the conductive protection layer comprises graphite.

6. The railway feedthrough ground wire of claim 5, wherein the membrane layer is a carbon nanotube doped modified viscose.

7. The railway ground feedthrough according to any one of claims 1 to 3, wherein the soil-joining layer is woven from a plurality of conductive corrosion-resistant wires.

8. The railway feedthrough ground of claim 7, wherein the conductive corrosion resistant wire is a flexible graphite wire harness.

9. A railway feedthrough ground of any of claims 1 to 3, further filled with a filler for expanding diameter.

10. The railroad feedthrough ground of claim 9, wherein the filler is graphite.

11. The railway ground feedthrough of any one of claims 1 to 3, further comprising a signal wire for detecting the presence of a break in the railway ground feedthrough.

12. A railway feedthrough according to any of claims 1 to 3, further comprising an optical fiber for detecting the location of a break point of the railway feedthrough.

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