CN211150126U - Flexible graphite through ground wire - Google Patents
Flexible graphite through ground wire Download PDFInfo
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- CN211150126U CN211150126U CN202020051388.9U CN202020051388U CN211150126U CN 211150126 U CN211150126 U CN 211150126U CN 202020051388 U CN202020051388 U CN 202020051388U CN 211150126 U CN211150126 U CN 211150126U
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- layer
- graphite
- ground wire
- flexible
- fiber
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 78
- 239000010439 graphite Substances 0.000 title claims abstract description 78
- 239000000835 fiber Substances 0.000 claims abstract description 49
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000004020 conductor Substances 0.000 claims abstract description 31
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 10
- 239000010410 layer Substances 0.000 claims description 94
- 239000002131 composite material Substances 0.000 claims description 9
- 239000003365 glass fiber Substances 0.000 claims description 9
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 8
- 229920000271 Kevlar® Polymers 0.000 claims description 8
- 239000004917 carbon fiber Substances 0.000 claims description 8
- 239000004761 kevlar Substances 0.000 claims description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 239000012790 adhesive layer Substances 0.000 claims description 7
- 239000003292 glue Substances 0.000 claims description 4
- 238000009941 weaving Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002689 soil Substances 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000002356 single layer Substances 0.000 description 5
- 239000002861 polymer material Substances 0.000 description 4
- 239000002041 carbon nanotube Substances 0.000 description 3
- 229910021393 carbon nanotube Inorganic materials 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- FFRBMBIXVSCUFS-UHFFFAOYSA-N 2,4-dinitro-1-naphthol Chemical compound C1=CC=C2C(O)=C([N+]([O-])=O)C=C([N+]([O-])=O)C2=C1 FFRBMBIXVSCUFS-UHFFFAOYSA-N 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 208000028659 discharge Diseases 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model relates to a flexible graphite through ground wire, which comprises a contact layer and a conductor layer, wherein the contact layer is coated outside the conductor layer, and a bearing layer is arranged inside the conductor layer; one side of the contact layer, which is far away from the conductor layer, is of a net structure with an uneven surface, and the contact layer is composed of a plurality of graphite flexible wires; the bearing layer is formed by twisting a plurality of tensile fiber bundles; the conductor layer comprises a plurality of strands of copper wires, and the plurality of strands of copper wires are wound on the outer side of the bearing layer. The utility model discloses a link up ground wire adopts the mode of weaving with graphite parcel copper core, the conductive layer outside with graphite in the conductive layer for the whole flexibility of link up ground wire is good, easy operation, and the conductive layer is inside to set up the load layer, has effectively guaranteed the tensile ability of link up ground wire.
Description
Technical Field
The utility model belongs to the technical field of ground connection, in particular to flexible graphite link up ground wire.
Background
The railway comprehensive grounding system is a common grounding system which takes through ground wires laid on two sides of a railway as a grounding trunk line and connects professional electric and electronic system equipment, internal structural steel bars of buildings, long and large metal pieces and the like along the railway into a whole in an equipotential connection mode.
The railway through ground wire is used as a main artery of a railway comprehensive grounding system, plays an important role in connecting each system and draining to the ground, and provides a stable zero potential grounding point for each signal system, so the railway through ground wire has the outstanding characteristics that: the equipotential of the trackside equipment is realized, the grounding resistance is reduced, and the redundant channel for the traction backflow of the electrified railway is also realized.
The conventional railway through ground wire mostly adopts a high-molecular through ground wire and a composite metal through ground wire. The outer skin of the polymer through ground wire is made of polymer materials, and the polymer materials have general conductivity, low ignition point and poor flame retardance. In the application process, the number of firing cases caused by the ignition of the polymer through ground wire and the surrounding large metal pieces or cables is not large. Due to the defects of the body of the high polymer material, the high polymer material can easily self-ignite to cause the big fire of surrounding signal equipment after lap-joint ignition or temperature rise caused by large current, so that the basic safety requirement of the application of the railway through ground wire is not met.
The outer skin of the composite metal through ground wire is made of composite metal, and the composite metal through ground wire is hard and golden yellow. In the practical application process, the ground wire is hard and not easy to bend, and the ground wire cannot be flatly placed in the cable groove when passing through a bridge and tunnel and laid, so that the bending and the exposure cause greater discharge risk, and the difficulty of site construction is greatly increased; the outer skin of the composite metal is golden in color, and the composite metal is easy to disassemble and high in economic value, so that the composite metal is seriously stolen on site, and the potential safety hazard of a railway signal system is greatly increased.
Therefore, a railway through ground wire with good flexibility and slow temperature rise is needed, and the through ground wire is required to be ensured to have sufficient tensile capacity because the through ground wire is pulled by a large force in the laying process.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model provides a flexible graphite link up ground wire.
A flexible graphite through ground wire comprises a contact layer and a conductor layer, wherein the contact layer is coated on the outer side of the conductor layer, and a bearing layer is arranged inside the conductor layer;
one side of the contact layer, which is far away from the conductor layer, is of a net structure with an uneven surface, and the contact layer is composed of a plurality of graphite flexible wires;
the bearing layer is formed by twisting a plurality of tensile fiber bundles;
the conductor layer comprises a plurality of strands of copper wires, and the plurality of strands of copper wires are wound on the outer side of the bearing layer.
Furthermore, the plurality of graphite flexible wires are spirally wound and mutually woven along the outer surface of the conductor layer to form a compact net sleeve.
Further, the graphite flexible wire is formed by twisting a plurality of flexible thin wires;
the flexible filament includes a skeletal fiber and a first graphite layer.
Further, the first graphite layer is bonded and connected with the skeleton fiber through composite glue.
Further, the skeleton fiber is glass fiber or Kevlar fiber.
Further, the first graphite layer is flake graphite.
Furthermore, the copper wire comprises a second graphite layer, a conductive adhesive layer and a copper wire;
wherein,
the second graphite layer is coated on the outer surface of the copper wire through the conductive adhesive layer.
Furthermore, the tensile fiber bundle is made of any one or a combination of carbon fiber, glass fiber or Kevlar fiber.
The utility model discloses a link up ground wire adopts the conductive layer to set up the mode that graphite parcel copper core, outside were woven with graphite for link up the whole flexibility of ground wire good, the temperature rise is slow, easy operation, and inside sets up the load layer, has effectively guaranteed the tensile ability of link up ground wire. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 shows a schematic cross-sectional structure diagram of the railway through ground wire of the present invention;
fig. 2 shows a schematic structural view of the contact layer of the present invention;
fig. 3 shows a schematic structural view of a flexible thin wire of the present invention;
fig. 4 shows a schematic cross-sectional view of a graphite-coated copper wire according to the present invention;
fig. 5 shows the cross-sectional structure of the force-bearing layer of the present invention.
Description of the drawings: 1. a contact layer; 11. a graphite flexible wire; 111. a framework fiber; 112. a first graphite layer; 2. a conductor layer; 21. a copper wire; 211. a second graphite layer; 212. a copper wire; 213. a conductive adhesive layer; 3. a bearing layer; 31. tensile fiber bundles.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
A flexible graphite through ground wire comprises a contact layer 1 positioned on the outermost layer of the through ground wire, a conductor layer 2 positioned on the inner side of the contact layer 1 and a force bearing layer 3 positioned inside the conductor layer 2, as shown in figure 1. Contact layer 1 cladding is at the surface of conductor layer 2, and the cladding of conductor layer 2 is at the surface of load layer 3, and contact layer 1, conductor layer 2 and load layer 3 all closely laminate the setting.
As shown in fig. 2, the side of the contact layer 1 away from the conductor layer 2 is an uneven net structure, the contact layer 1 is composed of a plurality of graphite flexible wires 11, and the plurality of graphite flexible wires 11 are spirally wound along the outer surface of the conductor layer 2 and are mutually woven to form a tight net sleeve.
Closely the contact layer 1 of inseparable dictyosome form wraps up conductor layer 2 closely, make to link up the ground wire and be nearly cylindric or cylindric, 11 spiral windings of every graphite flexible line are on conductor layer 2, make the whole railway after inseparable dictyosome parcel link up the surperficial unevenness of ground wire, increased with the area of contact on ground, improved the contact nature with soil, make to link up the ground wire in the use, the ground connection is flowed and is carried forward the performance better, ensure simultaneously that contact layer 1 can protect inside conductor layer 2 for a long time, realize lining up the difficult damage of ground wire.
The graphite flexible thread 11 may be made of a twisted plurality of flexible filaments comprising an inner skeleton fiber 111 and an outer first graphite layer 112. As shown in fig. 3, the first graphite layer 112 wraps the skeleton fibers 111 completely to form thin flexible thin wires, and a plurality of thin flexible thin wires are twisted to form a thick flexible graphite wire 11.
The graphite flexible wire 11 can also be made of a plurality of skeleton fibers 111 directly with graphite. Specifically, the plurality of skeleton fibers 111 are directly bonded to graphite, and the graphite adhered to the surfaces of the skeleton fibers 111 forms the graphite layer 112.
The material of the first graphite layer 112 may be flake graphite, and the material of the skeleton fiber 111 may be glass fiber or kevlar fiber, but the material of the first graphite layer 112 and the skeleton fiber 111 is not limited thereto.
The combination of the flake graphite and the skeleton fiber 111 ensures that the graphite flexible wire 11 has the flexibility of graphite and can maintain the shape and toughness of the outer layer of the through ground wire. The scale graphite is adhered to the outside of the skeleton fiber 111 through a small amount of compound glue and is uniformly attached to the outside of the skeleton fiber 111 at the same time, so that the outside graphite wrapping the skeleton fiber 111 is formed. Because the flake graphite has good conductivity, the contact layer 1 woven by the graphite flexible wires 11 has strong conductivity, and the drainage capacity of the railway through ground wire is effectively enhanced.
The conductor layer 2 mainly comprises a plurality of strands of copper wires 21, and the plurality of strands of copper wires 21 are wrapped on the outer side of the force bearing layer 3.
As shown in fig. 4, in the copper wire 21, the outer layer is the second graphite layer 211, the middle layer is the conductive adhesive layer 213, and the inner layer is the copper wire 212, that is, the copper wire 21 is formed by coating the second graphite layer 211 on the outer surface of the copper wire 212 through the conductive adhesive layer 213.
The copper wire 21 can be made of red copper or brass, the second graphite layer 211 can be made of crystalline flake graphite, the conductive adhesive layer 213 can be made of carbon nanotube conductive adhesive, the conductivity of the carbon nanotube conductive adhesive is 0.01S/m, the long-term use temperature is 200 ℃, and the copper wire has good conductivity and high temperature resistance.
Use carbon nanotube conducting resin can bond graphite layer 211 on the copper wire 212 surface, wrap up in the copper wire 212 outside completely through second graphite layer 211, ensure that copper wire 212 is difficult for exposing, avoid copper wire 212 to be stolen easily and retrieve, moreover with second graphite layer 211 and copper wire 212 physical isolation to stop copper wire 212 surface to produce the electrode potential, prevent itself and take place electrochemical corrosion to near steel. The conductor layer 2 formed by adopting the structure has good conductivity, flexibility, electrolytic corrosion resistance and chemical corrosion resistance, and the service life of the graphite through ground wire is effectively prolonged.
As shown in fig. 5, the force-bearing layer 3 is a cylindrical core formed by twisting a plurality of tensile fiber bundles 31, and the axis of each tensile fiber bundle 31 is parallel to the axis of the copper wire 21. The plurality of tensile fiber bundles 31 constitute a multi-layer core with gradually reduced diameter: partial tensile fiber bundles 31 are sequentially arranged in parallel along the surface of the copper wire 21 to form an outer ring single-layer ring, partial tensile fiber bundles 31 are sequentially arranged along the inner side of the single-layer ring to form a secondary outer ring single-layer ring, the secondary outer ring single-layer ring is continuously arranged along the secondary outer ring single-layer ring, and the diameter of the tensile fiber bundles 31 is gradually increased outwards.
The tensile fiber yarn in the tensile fiber bundle 31 is made of carbon fiber, glass fiber, boron fiber or kevlar fiber, but is not limited thereto, and may be made by combining the above fibers.
The carbon fiber has the characteristics of high temperature resistance, friction resistance, corrosion resistance and the like, and is soft and can be processed into various fabrics. Because the graphite microcrystalline structure of the carbon fiber is preferentially oriented along the fiber axis, the carbon fiber has high strength and modulus along the fiber axis direction, and the density of the carbon fiber is small, so the specific strength and the specific modulus are high;
the long-term use temperature of the glass fiber is-196-300 ℃, the tensile strength is 2Gpa, and the glass fiber has the characteristics of wide use temperature range, good insulation property, strong heat resistance, good corrosion resistance and high tensile strength;
the Kevlar fiber has the characteristics of long-term use temperature of-196-204 ℃, tensile strength of 3.6Gpa, low density, high strength, good toughness and high temperature resistance; tensile fiber is used as a main structural material of the bearing layer 3, so that the tensile capacity of the through ground wire can be enhanced, and the flexibility of the through ground wire is further increased.
The bearing layer 3 formed by combining the single fiber or the multiple fibers has stronger tensile capacity. Illustratively, the tensile fiber bundle 31 may be made of carbon fiber alone or glass fiber and kevlar fiber together.
Tensile fiber is used as a main structural material of the bearing layer 3, so that the tensile capacity of the through ground wire can be enhanced, and the flexibility of the through ground wire is further increased.
The conductive layer 2 of the railway through ground wire is internally provided with the graphite copper-clad wire 21, the contact layer 1 is woven by the graphite flexible wire 11, the graphite adopted in all substances is flake graphite, and the body of the flake graphite has good high-temperature resistance, electric conduction, heat conduction, lubrication, plasticity, acid and alkali resistance and other properties, so that when the conductive material is used in the railway through ground wire, the current dissipation capacity and the heat dissipation capacity of the railway through ground wire are improved, and the phenomenon that the temperature of the whole ground wire is too fast increased to cause fire disasters due to the rise of the ground wire or the peripheral temperature in the process of releasing lightning current and power frequency short circuit current is avoided; meanwhile, the flexibility and the corrosion resistance of the railway through ground wire are enhanced, the railway through ground wire can be easily bent for 360 degrees under the manpower condition in the installation and laying process, and the corrosion resistance realizes that the railway through ground wire can be used for a long time in different soils such as chloride saline soil, saline-alkali soil, meadow soil, soil loam, strong acid soil and the like.
Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled 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 depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. The flexible graphite through ground wire comprises a contact layer (1) and a conductor layer (2), and is characterized in that the contact layer (1) is coated on the outer side of the conductor layer (2), and a bearing layer (3) is arranged in the conductor layer (2);
one side, far away from the conductor layer (2), of the contact layer (1) is of a net-shaped structure with an uneven surface, and the contact layer (1) is composed of a plurality of graphite flexible wires (11);
the bearing layer (3) is formed by twisting a plurality of tensile fiber bundles (31);
the conductor layer (2) comprises a plurality of strands of copper wires (21), and the plurality of strands of copper wires (21) are wound on the outer side of the force bearing layer (3).
2. The flexible graphite feedthrough ground wire of claim 1, characterized in that a plurality of the graphite flexible wires (11) are spirally wound along the outer surface of the conductor layer (2) and woven with each other to form a tight mesh.
3. A flexible graphite feedthrough ground wire according to claim 1 or 2, characterized in that the graphite flexible wire (11) is made of a number of flexible thin wires twisted;
the flexible filament comprises a skeletal fibre (111) and a first graphite layer (112).
4. The flexible graphite feedthrough ground wire of claim 3, wherein the first graphite layer (112) is adhesively bonded to the backbone fiber (111) by a composite glue.
5. The flexible graphite through ground wire according to claim 3, wherein the skeleton fiber (111) is a glass fiber or a Kevlar fiber.
6. Flexible graphite feedthrough ground wire according to claim 4 or 5, characterized in that the first graphite layer (112) is flake graphite.
7. Flexible graphite through-ground wire according to claim 1, characterized in that the copper wire (21) comprises a second graphite layer (211), a conductive glue layer (213) and copper wires (212),
wherein,
the second graphite layer (211) is coated on the outer surface of the copper wire (212) through the conductive adhesive layer (213).
8. The flexible graphite through ground wire according to claim 1, wherein the tensile fiber bundle (31) is made of one or more of carbon fiber, glass fiber and Kevlar fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020051388.9U CN211150126U (en) | 2020-01-10 | 2020-01-10 | Flexible graphite through ground wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020051388.9U CN211150126U (en) | 2020-01-10 | 2020-01-10 | Flexible graphite through ground wire |
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| Publication Number | Publication Date |
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| CN211150126U true CN211150126U (en) | 2020-07-31 |
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| CN202020051388.9U Active CN211150126U (en) | 2020-01-10 | 2020-01-10 | Flexible graphite through ground wire |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113253061A (en) * | 2021-07-06 | 2021-08-13 | 武汉黉门电工科技有限公司 | Through ground wire monitoring method and system |
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2020
- 2020-01-10 CN CN202020051388.9U patent/CN211150126U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113253061A (en) * | 2021-07-06 | 2021-08-13 | 武汉黉门电工科技有限公司 | Through ground wire monitoring method and system |
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