CN213716587U - High-performance internal shielding railway digital signal cable - Google Patents
High-performance internal shielding railway digital signal cable Download PDFInfo
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- CN213716587U CN213716587U CN202021664350.5U CN202021664350U CN213716587U CN 213716587 U CN213716587 U CN 213716587U CN 202021664350 U CN202021664350 U CN 202021664350U CN 213716587 U CN213716587 U CN 213716587U
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Abstract
The invention provides a high-performance internal shielding railway digital signal cable, which comprises a cable core and a protective layer outside the cable core; the cable core comprises at least one shielding four-wire group, wherein the shielding four-wire group comprises a wire core and a first non-hygroscopic insulating layer, a steel wire mesh grid, a PE reticulate belt, an inner shielding layer and a second non-hygroscopic insulating layer which are sequentially coated on the outer side of the wire core; the wire core comprises four insulated single wires with different colors; the protective layer comprises a third non-hygroscopic insulating layer, a metal shielding layer, an inner liner, a steel belt armor layer and an outer sheath which are sequentially coated from inside to outside. The cable provided by the invention has excellent compression resistance, tensile resistance, torsion resistance and creep deformation performance, and the arranged inner shielding layer ensures that the cable has good shielding effect, good corrosion resistance, ageing resistance and wear resistance and stronger fatigue resistance.
Description
Technical Field
The invention belongs to the technical field of cables, and particularly relates to a high-performance internal shielding railway digital signal cable.
Background
China, as a typical continental country, has a large population, broad members and large economic connection and communication span, and railways serve as important infrastructures, arteries of the national economy and popular vehicles, so that the safety of trains is self-evident. The existing internal shielding railway digital signal cable has the defects of poor temperature resistance and chemical corrosion resistance, poor compression resistance, tensile resistance, torsion resistance, creep resistance, poor shielding performance and the like, and can not well meet the requirements of high-speed railways on the cable, so the improvement is needed.
Disclosure of Invention
In view of the above, the present invention provides a high performance internal shielded railway digital signal cable, which is designed to overcome the defects in the prior art.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a high-performance internal shielding railway digital signal cable comprises a cable core and a protective layer outside the cable core; the cable core comprises at least one shielding four-wire group, wherein the shielding four-wire group comprises a wire core and a first non-hygroscopic insulating layer, a steel wire mesh grid, a PE reticulate belt, an inner shielding layer and a second non-hygroscopic insulating layer which are sequentially coated on the outer side of the wire core; the wire core comprises four insulated single wires with different colors; the protective layer comprises a third non-hygroscopic insulating layer, a metal shielding layer, an inner liner, a steel belt armor layer and an outer sheath which are sequentially coated from inside to outside.
Further, at least one leakage line is arranged between the inner shielding layer and the second non-hygroscopic insulating layer.
Further, the insulated single wire comprises a conductor and an insulating layer coated outside the conductor.
Furthermore, the steel wire mesh grid is formed by weaving carbon spring steel wires.
Further, the inner shielding layer is a shielding layer made of a copper strip with the copper content of 99.9% through a longitudinal wrapping or welding process.
Further, the first non-hygroscopic insulating layer, the second non-hygroscopic insulating layer and the third non-hygroscopic insulating layer adopt teflon single-sided adhesive tapes.
Compared with the prior art, the invention has the following advantages:
the cable provided by the invention has excellent compression resistance, tensile resistance, torsion resistance and creep deformation performance, and the arranged inner shielding layer ensures that the cable has good shielding effect, good corrosion resistance, ageing resistance and wear resistance and stronger fatigue resistance. The first non-hygroscopic insulating layer, the second non-hygroscopic insulating layer and the third non-hygroscopic insulating layer are coated by the Teflon adhesive tape, so that a process of a heat insulating layer is omitted, the production efficiency is high, the manufacturing cost is low, the cable is good in sealing moisture resistance, good in heat resistance, strong in chemical corrosion resistance, high in strength, good in stability, good in durability and good in insulativity.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. In the drawings:
FIG. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic view of the framework of the embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. 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," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
The invention will be described in detail with reference to the following embodiments with reference to the attached drawings.
A high-performance internal shielding railway digital signal cable, as shown in figure 1, comprises a cable core and a sheath layer outside the cable core; the cable core comprises at least one shielding four-wire set 15, wherein the shielding four-wire set comprises a wire core and a first non-hygroscopic insulating layer 1, a steel wire mesh grid 2, a PE (polyethylene) anilox belt 3, an inner shielding layer 4 and a second non-hygroscopic insulating layer 5 which are sequentially coated on the outer side of the wire core;
the wire core comprises four insulated single wires 6 with different colors; the sheath comprises a third non-hygroscopic insulating layer 7, a metal shielding layer 8, an inner liner layer 9, a steel tape armor layer 10 and an outer sheath 11 which are sequentially coated from inside to outside.
In an alternative embodiment, at least one flow leakage line 12 is provided between the inner shield layer and the second non-hygroscopic insulating layer. The leakage line is tightly attached to the inner shielding layer and the second non-moisture-absorption insulating layer, so that the leakage line can be prevented from moving or being damaged during wiring or use, and the using effect is prevented from being influenced.
The insulated single wire comprises a conductor and an insulating layer coated outside the conductor. Generally, the insulation layer adopts a skin-foam-skin three-layer co-extrusion physical foaming structure, so that the insulation resistance of the cable can be effectively improved, the transmission attenuation of the cable is reduced, and the working capacitance of the cable is reduced, thereby greatly improving the safety and reliability of the cable.
In an alternative embodiment, the wire mesh grid is woven from carbon spring wire. Specifically, the steel wire mesh grid is woven by carbon spring steel wires with the diameter not less than 0.2 mm. The carbon spring steel wire mesh grid has the advantages of good rebound resilience, strong compression resistance, tensile resistance, torsion resistance and creep deformation resistance, and high cable safety coefficient.
By way of example, the inner shield is a shield made by a longitudinal wrapping or soldering process using a copper strip having a copper content of 99.9%. Specifically, the inner shielding layer is a shielding layer which is made of a copper strip with the thickness of not less than 0.09mm and the copper content of 99.9% by an embossing and longitudinally wrapping process. The copper strip embossing longitudinal-wrapped shielding layer has good extensibility and strong bending property, so that the cable has good shielding effect, good corrosion resistance, ageing resistance and wear resistance and stronger fatigue resistance.
The first non-hygroscopic insulating layer, the second non-hygroscopic insulating layer and the third non-hygroscopic insulating layer adopt Teflon single-sided adhesive tapes. Specifically, the first non-hygroscopic insulating layer, the second non-hygroscopic insulating layer and the third non-hygroscopic insulating layer are formed by wrapping a teflon single-sided adhesive tape with the thickness not less than 0.04mm by a wrapping process. When the packaging is carried out, the Teflon single-sided adhesive tape is arranged with the adhesive surface facing downwards, and the non-adhesive surface facing upwards. Because the Teflon single-sided adhesive tape has strong viscosity, the adhesive surface of the Teflon single-sided adhesive tape is tightly attached to the surface of the cable core and the lapping and overlapping part of the Teflon single-sided adhesive tape, and no gap exists.
Through the structural form of the first non-hygroscopic insulating layer, the second non-hygroscopic insulating layer and the third non-hygroscopic insulating layer of the sheath part of the cable core part, the cable has excellent sealing and moisture-proof performance, replaces a heat insulating layer in the prior art, omits an intermediate production link, reduces the production quality risk and improves the production efficiency. In addition, the Teflon single-sided adhesive tape has the advantages of good heat resistance, strong chemical corrosion resistance, high strength, good stability, good durability and excellent insulativity, and can effectively prolong the service life of the cable.
By way of example, the cable production manufacturing process: four insulating sheets with different colors are stranded to form a wire core of a four-wire group, a first non-hygroscopic insulating layer is coated outside the wire core, and then a steel wire mesh grid is coated outside the first non-hygroscopic insulating layer by a high-speed braiding machine. Then, a layer of PE mesh belt is wrapped outside the steel wire mesh grid by adopting a longitudinal wrapping process, a drain line is arranged on the PE mesh belt, then, a copper strip and a second non-hygroscopic insulating layer are wrapped on four wire groups wrapped with a first non-hygroscopic insulating layer, the steel wire mesh grid, the PE mesh belt and the drain line by adopting a longitudinal wrapping and wrapping process to manufacture four shielding wire groups (when a plurality of four shielding wire groups are adopted, all the four shielding wire groups are twisted to manufacture a cable core), and then, a third non-hygroscopic insulating layer, a metal shielding layer, an inner lining layer, a steel strip armor layer and an outer sheath are sequentially wrapped outside the cable core.
For improving the compression resistance of the cable, the gap between the steel wire mesh grid and the first non-hygroscopic insulating layer coated on the steel wire mesh grid is controlled to be 0.3-1 mm. In an optional embodiment, as shown in fig. 2, the wire core portion of the shielding four-wire set further includes a framework 13, the framework includes a plurality of U-shaped grooves 14 uniformly distributed at the outer edge, an insulating single wire is arranged in each groove, and the insulating single wires are separated by the framework, so that the cable has strong compression resistance and tensile resistance, and meanwhile, the interference between the single wires is avoided.
The cable provided by the invention has excellent compression resistance, tensile resistance, torsion resistance and creep deformation performance, and the arranged inner shielding layer ensures that the cable has good shielding effect, good corrosion resistance, ageing resistance and wear resistance and stronger fatigue resistance. The first non-hygroscopic insulating layer, the second non-hygroscopic insulating layer and the third non-hygroscopic insulating layer are coated by the Teflon adhesive tape, so that a process of a heat insulating layer is omitted, the production efficiency is high, the manufacturing cost is low, the cable is good in sealing moisture resistance, good in heat resistance, strong in chemical corrosion resistance, high in strength, good in stability, good in durability and good in insulativity. Meanwhile, the cable is simple in production process, high in production efficiency, stable in quality and convenient to lay.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.
Claims (5)
1. A high-performance internal shielding railway digital signal cable is characterized in that: the cable comprises a cable core and a sheath layer outside the cable core; the cable core comprises at least one shielding four-wire group, wherein the shielding four-wire group comprises a wire core and a first non-hygroscopic insulating layer, a steel wire mesh grid, a PE reticulate belt, an inner shielding layer and a second non-hygroscopic insulating layer which are sequentially coated on the outer side of the wire core; the wire core comprises four insulated single wires with different colors; the protective layer comprises a third non-hygroscopic insulating layer, a metal shielding layer, an inner liner, a steel belt armor layer and an outer sheath which are sequentially coated from inside to outside.
2. The high performance internally shielded railway digital signal cable of claim 1, wherein: at least one leakage line is arranged between the inner shielding layer and the second non-hygroscopic insulating layer.
3. The high performance internally shielded railway digital signal cable of claim 1, wherein: the insulated single wire comprises a conductor and an insulating layer coated outside the conductor.
4. The high performance internally shielded railway digital signal cable of claim 1, wherein: the steel wire mesh grid is formed by weaving carbon spring steel wires.
5. The high performance internally shielded railway digital signal cable of claim 1, wherein: the first non-hygroscopic insulating layer, the second non-hygroscopic insulating layer and the third non-hygroscopic insulating layer are made of Teflon single-sided adhesive tapes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021664350.5U CN213716587U (en) | 2020-08-12 | 2020-08-12 | High-performance internal shielding railway digital signal cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021664350.5U CN213716587U (en) | 2020-08-12 | 2020-08-12 | High-performance internal shielding railway digital signal cable |
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| CN213716587U true CN213716587U (en) | 2021-07-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113628794A (en) * | 2021-08-11 | 2021-11-09 | 江苏通鼎光电科技有限公司 | High-performance railway axle counting cable |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113628794A (en) * | 2021-08-11 | 2021-11-09 | 江苏通鼎光电科技有限公司 | High-performance railway axle counting cable |
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