CN210223645U

CN210223645U - High-temperature-resistant internal-shielding railway digital signal cable

Info

Publication number: CN210223645U
Application number: CN201920939032.6U
Authority: CN
Inventors: Xiaoping Shen; 沈小平; Jiang Zhou; 周江
Original assignee: Jiangsu Tongding Optic Electronic Stock Co Ltd
Current assignee: Jiangsu Tongding Optic Electronic Stock Co Ltd
Priority date: 2019-06-21
Filing date: 2019-06-21
Publication date: 2020-03-31
Anticipated expiration: 2029-06-21

Abstract

The utility model provides a high temperature resistant internal shield railway digital signal cable, which comprises a cable core and a sheath structure coated outside the cable core; the cable core includes at least one shielding four-wire group, each shielding four-wire group all includes nanometer carbon copper foil cooling tube and the interior several insulating single lines of nanometer carbon copper foil cooling tube and at least one let off the streamline and the outside group's sheath of nanometer carbon copper foil cooling tube. The utility model discloses the creation adopts nanometer carbon copper foil cooling tube, high temperature resistant transparent anticorrosive heat coating, heat conduction silicone grease layer, and structural design is reasonable, and the cable has superior heat conductivility, and high temperature resistance can be good, and shielding effect is good, and corrosion-resistant, ageing resistance, wear resistance are good, fatigue resistance can be stronger.

Description

High-temperature-resistant internal-shielding railway digital signal cable

Technical Field

The invention belongs to the technical field of railway digital signal cables, and particularly relates to a high-temperature-resistant 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 is easy to age due to poor high temperature resistance, low safety factor and short service life.

Disclosure of Invention

In view of this, the present invention provides a high temperature resistant internal shielded railway digital signal cable to improve the service performance and prolong the service life.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a high-temperature-resistant internal-shielding railway digital signal cable comprises a cable core and a sheath structure coated outside the cable core; the cable core comprises at least one shielding four-wire set, and each shielding four-wire set comprises a nano carbon copper foil radiating pipe, a plurality of insulating single wires in the nano carbon copper foil radiating pipe, at least one current leakage wire and a wire set protective layer outside the nano carbon copper foil radiating pipe; ceramic powder is filled among the insulating single wires and between the insulating single wires and the nano carbon copper foil radiating pipe; the sheath structure comprises a cable core belting layer, a high-temperature-resistant coating, a metal shielding layer, a polyethylene bonding sheath, a heat-conducting silicone grease layer, an armor layer and an outer sheath which are sequentially arranged from inside to outside.

Further, the insulated single wire comprises a conductor, and an insulating layer is coated outside the conductor; the insulating layer adopts a skin-foam-skin three-layer co-extrusion physical foaming structure.

Furthermore, the nano carbon copper foil radiating pipe is formed by combining copper and rare earth elements, has three layers in total, and sequentially comprises a heat radiation layer, a copper alloy layer and a heat conduction adhesive layer from inside to outside.

Further, the heat radiation layer is made of a nano carbon material, the copper alloy layer is made of copper foil with the copper content of more than 99.90%, and the heat conduction adhesive layer is made of acrylic adhesive tape.

Further, the ceramic powder is high-temperature resistant ceramic powder.

Further, the wire group protection layer comprises a PET (polyethylene terephthalate) film and a sheath which are sequentially arranged from inside to outside.

Further, the heat-conducting silicone grease layer is made of organic silicon serving as a base material.

Compared with the prior art, the invention has the following advantages:

the cable adopts the nano-carbon copper foil radiating tube, the high-temperature-resistant transparent anti-corrosion thermal coating and the heat-conducting silicone grease layer, has reasonable structural design, has excellent heat-conducting performance, good high-temperature resistance, good shielding effect, good corrosion resistance, ageing resistance and wear resistance and stronger fatigue resistance.

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 invention.

Description of reference numerals:

1. shielding the four-wire set; 2. insulating the single wire; 3. an insulating layer; 4. ceramic powder; 5. a flow relief line; 6. a nano carbon copper foil radiating pipe; 7. a PET polyester film; 8. a sheath; 9. a cable core belting layer; 10. a high temperature resistant coating; 11. a metal shielding layer; 12. a polyethylene bonding sheath; 13. a thermally conductive silicone layer; 14. an armor layer; 15. an outer sheath.

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 temperature resistant internal shielding railway digital signal cable, as shown in figure 1, comprises a cable core and a sheath structure coated outside the cable core; the cable core comprises at least one shielding four-wire set 1, and each shielding four-wire set comprises a nano carbon copper foil radiating pipe, a plurality of insulating single wires 2 in the nano carbon copper foil radiating pipe 6, at least one current leakage wire 5 and a wire set protective layer outside the nano carbon copper foil radiating pipe; ceramic powder 4 is filled among the insulating single wires and between the insulating single wires and the nano carbon copper foil radiating pipe; the sheath structure comprises a cable core belting layer 9, a high-temperature-resistant coating 10, a metal shielding layer 11, a polyethylene bonding sheath 12, a heat-conducting silicone grease layer 13, a double-steel-belt armor layer 14 and an outer sheath 15 which are sequentially arranged from inside to outside.

In an alternative embodiment, the cable core may comprise two shielded quad sets. Generally, the insulated single wire includes a conductor, and an insulating layer 3 is coated outside the conductor; the insulating 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.

The high-temperature-resistant coating is a high-temperature-resistant transparent anticorrosion thermal coating, is formed by adding ultramicro inorganic metal oxide into high-purity silicate solution, has the temperature resistance of 1700 ℃, is completely transparent, has no volatile odor at normal temperature and high temperature, has good adhesive force, good heat insulation, flame retardance, oxidation resistance and anticorrosion performance, and is energy-saving and environment-friendly.

The wire group protection layer comprises a PET film 7 and a sheath 8 which are sequentially arranged from inside to outside. The cable has temperature resistance, dampproofing waterproof performance to can protect inside cable core from external impact damage.

The heat-conducting silicone grease layer is prepared by taking organic silicon (polysiloxane polymer) as a basic raw material and adding materials with excellent heat resistance and heat-conducting property, and has the advantages of high heat conductivity, excellent heat conductivity, no toxicity, no odor, no corrosiveness, stable chemical and physical properties, high temperature resistance, aging resistance and strong waterproof property.

The ceramic powder is made of high-temperature-resistant ceramic powder, and is usually made of various inorganic materials containing silicon, aluminum, titanium, oxygen and the like, so that the ceramic powder has excellent high-temperature resistance, aging resistance and friction resistance and high safety coefficient.

The nano carbon copper foil radiating pipe is formed by combining copper and rare earth elements, has three layers in total, and sequentially comprises a heat radiation layer, a copper alloy layer and a heat conduction adhesive layer from inside to outside. The heat radiation layer is nano carbon, the copper alloy layer is a copper foil with the copper content of more than 99.90%, and the heat conduction adhesive layer is an acrylic adhesive tape. The prepared shielding structure has good flexibility, strong high-temperature resistance and strong shielding performance, and can effectively reduce the loss of materials. And the heat-conducting adhesive layer is tightly attached to the PET film coated outside the heat-conducting adhesive layer, so that the sealing and moisture-proof performance of the cable is effectively improved.

Meanwhile, the filled ceramic powder, the metal shielding layer and the nano carbon copper foil radiating pipe act together, so that the shielding performance is effectively improved, and compared with the case that the metal shielding layer and the nano carbon copper foil radiating pipe are applied independently, even the combination of the metal shielding layer and the nano carbon copper foil radiating pipe is adopted, the shielding performance is better. The ceramic powder, the high-temperature-resistant coating, the polyethylene bonding protective layer and the heat-conducting silicone grease layer act together, and compared with the structure in which each layer is applied independently or in combination, the high-temperature-resistant performance of the cable is better. The combination of the ceramic powder and each layer structure improves the shielding effect and the high temperature resistance, and obtains better performance.

During manufacturing, the prepared nano carbon copper foil radiating pipe is arranged on special threading equipment for standby, four insulating single wires with different colors are twisted into four groups, then the drainage wire is arranged on the twisted four groups, then the nano carbon copper foil radiating pipe, the filled ceramic powder and the wrapped PET polyester film are wrapped on the four groups with the drainage wire in one step through the threading equipment by adopting wrapping and filling processes, then a layer of sheath layer is wrapped by adopting an extrusion wrapping process to manufacture a shielded four-group, all the shielded four-group are twisted together to manufacture a cable core, and then a cable core wrapping tape layer, a high-temperature-resistant transparent anti-corrosion thermal coating, a metal shielding layer, a polyethylene bonding protective layer, a heat-conducting silicone layer, a double-steel-belt armor layer and an outer sheath are sequentially wrapped outside the cable core.

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

1. The utility model provides a high temperature resistant internal shield railway digital signal cable which characterized in that: comprises a cable core and a sheath structure coated outside the cable core; the cable core comprises at least one shielding four-wire set, and each shielding four-wire set comprises a nano carbon copper foil radiating pipe, a plurality of insulating single wires in the nano carbon copper foil radiating pipe, at least one current leakage wire and a wire set protective layer outside the nano carbon copper foil radiating pipe; ceramic powder is filled among the insulating single wires and between the insulating single wires and the nano carbon copper foil radiating pipe; the sheath structure comprises a cable core belting layer, a high-temperature-resistant coating, a metal shielding layer, a polyethylene bonding sheath, a heat-conducting silicone grease layer, an armor layer and an outer sheath which are sequentially arranged from inside to outside.

2. The high temperature resistant internal shielded railway digital signal cable of claim 1, wherein: the insulated single wire comprises a conductor, and an insulating layer is coated outside the conductor; the insulating layer adopts a skin-foam-skin three-layer co-extrusion physical foaming structure.

3. The high temperature resistant internal shielded railway digital signal cable of claim 1, wherein: the nano carbon copper foil radiating pipe is formed by combining copper and rare earth elements, has three layers in total, and sequentially comprises a heat radiation layer, a copper alloy layer and a heat conduction adhesive layer from inside to outside.

4. The high temperature resistant internal shielded railway digital signal cable of claim 3, wherein: the heat radiation layer is made of a nano carbon material, the copper alloy layer is made of copper foil with the copper content of more than 99.90%, and the heat conduction adhesive layer is made of acrylic adhesive tape.

5. The high temperature resistant internal shielded railway digital signal cable of claim 1, wherein: the ceramic powder is high-temperature resistant ceramic powder.

6. The high temperature resistant internal shielded railway digital signal cable of claim 1, wherein: the wire group protection layer comprises a PET (polyethylene terephthalate) film and a sheath which are sequentially arranged from inside to outside.

7. The high temperature resistant internal shielded railway digital signal cable of claim 1, wherein: the heat-conducting silicone grease layer is made of organic silicon serving as a basic raw material.