CN211670006U

CN211670006U - Special direct current cable for rail transit

Info

Publication number: CN211670006U
Application number: CN201922284996.4U
Authority: CN
Inventors: 薛守荣; 薛祥; 王寿权; 高斌
Original assignee: Yangzhou Gold Sunshine Cable Co ltd
Current assignee: Yangzhou Gold Sunshine Cable Co ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-10-13
Anticipated expiration: 2029-12-18

Abstract

The utility model relates to a track traffic technical field just discloses special DC cable for track traffic, including first protective sheath, the inner wall fixed mounting of first protective sheath has the shielding layer, the inner wall fixed mounting of shielding layer has the inoxidizing coating, the inside movable mounting of inoxidizing coating has the second protective sheath, the outside winding of second protective sheath has the tape wrapping layer that is located the inoxidizing coating inner wall, the inside fixed mounting of second protective sheath has the cable core, it has the outside filling layer that is located the second protective sheath to fill around the inside on tape wrapping layer, first protective sheath includes restrictive coating, first insulation layer and fire-retardant layer, the inner wall fixed mounting of restrictive coating has fire-retardant layer, the inner wall fixed mounting of fire-retardant layer has the first insulation layer, the second protective sheath includes inner sheath and second insulation layer. This special DC cable is used in track traffic for the stability and the barrier propterty of this cable are better, and more convenient to use user uses.

Description

Special direct current cable for rail transit

Technical Field

The utility model relates to a track traffic technical field specifically is special DC cable for track traffic.

Background

The rail transit means a type of transportation means or transportation system in which an operating vehicle needs to travel on a specific rail, and the most typical rail transit is a railway system consisting of a traditional train and a standard railway, and with the diversification development of train and railway technologies, the rail transit is more and more types, not only extending over long-distance land transportation, but also being widely applied to middle and short-distance urban public transportation, the rail transit generally comprises three categories of national railway system, intercity rail transit and urban rail transit, generally has the advantages of large transportation volume, high speed, dense shift, safety, comfort, high punctuation rate, all weather, low transportation cost, energy conservation, environmental protection and the like, but is accompanied by higher early investment, technical requirement and maintenance cost, and the occupied space is often large, and special direct current cables are needed in a power transmission system of rail transit.

When the existing special direct current cable is used, signal interference is easy to occur due to the fact that the cable is used inside track traffic, inconvenience is brought to users, the protection effect is poor when the cable is used, and the cable is not convenient for the users to use, so that the special direct current cable for track traffic is provided.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a special DC cable for track traffic possesses advantages such as protecting effect is good, has solved current special DC cable when using, because at the inside use of track traffic, signal interference's the condition appears easily, has brought inconvenience for the user to protecting effect is relatively poor when using, the problem that the user of not being convenient for used.

(II) technical scheme

For realizing the good purpose of above-mentioned protecting effect, the utility model provides a following technical scheme: special direct current cable for track traffic, including first protective sheath, the inner wall fixed mounting of first protective sheath has the shielding layer, the inner wall fixed mounting of shielding layer has the inoxidizing coating, the inside movable mounting of inoxidizing coating has the second protective sheath, the outside winding of second protective sheath has the around band layer that is located the inoxidizing coating inner wall, the inside fixed mounting of second protective sheath has the cable core, it has the filling layer that is located the second protective sheath outside to fill around the inside of band layer, first protective sheath includes restrictive coating, first insulation layer and fire-retardant layer, the inner wall fixed mounting of restrictive coating has fire-retardant layer, the inner wall fixed mounting of fire-retardant layer has the first insulation layer, the second protective sheath includes inner sheath and second insulating layer, the inner wall fixed mounting of inner sheath has the second insulating layer.

Preferably, the outer wall of the shielding layer is provided with a braided copper wire belt, the braided copper wire belt uniformly covers the outside of the shielding layer, the inner wall of the shielding layer is provided with a galvanized steel strip armor, and the thickness of the galvanized steel strip armor is not less than one millimeter.

Preferably, the flame-retardant layer is a flame-retardant polyvinyl chloride layer, and the thickness of the flame-retardant layer is one millimeter.

Preferably, restrictive coating and interior sheath are the polyvinyl chloride layer, and two millimeters are no less than to the thickness of restrictive coating, and one millimeter is no less than to the thickness of interior sheath.

Preferably, the thickness of the first insulating layer and the thickness of the second insulating layer are not more than one millimeter, and the inner wall of the second insulating layer is provided with the semiconductor paper tape.

Preferably, the inside of filling layer is provided with the glass fiber rope, and glass fiber rope evenly distributed is in around the inside of band layer, and the clearance between the glass fiber rope is not more than five millimeters at zero point, winds the band layer and is the glass fiber area, and the thickness of winding the band layer is not less than one little five millimeters.

(III) advantageous effects

Compared with the prior art, the utility model provides a special DC cable is used in track traffic possesses following beneficial effect:

the special direct current cable for track traffic has the advantages that the glass fiber has the characteristics of good insulativity, strong heat resistance and good corrosion resistance through the glass fiber rope arranged in the filling layer, so that the wrapping tape layer and the glass fiber rope are used simultaneously, the thermal protection performance of the cable can be further improved, the insulativity and the corrosion resistance of the cable can be further improved, the protection effect is better, the semiconductor paper tape is arranged on the inner wall of the second insulating layer and can be contacted with the cable core, the electric field on the outer surface of the cable core can be uniform, the phenomenon that the cable core and the second insulating layer generate local discharge due to unsmooth surface of the cable core and air gaps generated by cable core twisting is avoided, the stability of current transmission of the cable is improved, the interference of current models is reduced, the influence of external electromagnetism and signal fields on the cable can be effectively reduced through the woven copper wire belt arranged outside the shielding layer, therefore, the cable has better stability and protective performance and is more convenient for users to use.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is an enlarged schematic view of the structure at a position a of the present invention.

In the figure: the cable comprises a first protective sleeve 1, a protective sleeve 11, a first insulating layer 12, a flame retardant layer 13, a shielding layer 2, a protective layer 3, a wrapping tape layer 4, a second protective sleeve 5, an inner protective layer 51, a second insulating layer 52, a cable core 6 and a filling layer 7.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.

Referring to fig. 1-2, the special dc cable for rail transit comprises a first protective sheath 1, a shielding layer 2 is fixedly installed on the inner wall of the first protective sheath 1, a braided copper wire belt is arranged on the outer wall of the shielding layer 2, the braided copper wire belt uniformly covers the outside of the shielding layer 2, a galvanized steel tape armor is arranged on the inner wall of the shielding layer 2, the thickness of the galvanized steel tape armor is not less than one millimeter, a protective layer 3 is fixedly installed on the inner wall of the shielding layer 2, a second protective sheath 5 is movably installed inside the protective layer 3, a wrapping tape layer 4 positioned on the inner wall of the protective layer 3 is wound outside the second protective sheath 5, glass fiber ropes are arranged inside a filling layer 7, the glass fiber ropes are uniformly distributed inside a wrapping tape layer 4, the gap between the glass fiber ropes is not more than zero point five millimeters, the wrapping tape layer 4 is a glass fiber tape, and the thickness of the wrapping tape layer 4 is, the inside fixed mounting of second protective sheath 5 has cable core 6, it has filling layer 7 that is located the outside of second protective sheath 5 to fill around the inside of band layer 4, first protective sheath 1 includes restrictive coating 11, first insulating layer 12 and fire-retardant layer 13, fire-retardant layer 13 is fire-retardant polyvinyl chloride layer, the thickness of fire-retardant layer 13 is one millimeter, the inner wall fixed mounting of restrictive coating 11 has fire-retardant layer 13, the inner wall fixed mounting of fire-retardant layer 13 has first insulating layer 12, second protective sheath 5 includes inner sheath 51 and second insulating layer 52, restrictive coating 11 and inner sheath 51 are the polyvinyl chloride layer, the thickness of restrictive coating 11 is no less than two millimeters, the thickness of inner sheath 51 is no less than one millimeter, the inner wall fixed mounting of inner sheath 51 has second insulating layer 52, the thickness of first insulating layer 12 and second insulating layer 52 is not all greater than one millimeter, the inner wall of second insulating layer 52 is provided with the semiconductor paper tape, the special direct current cable for track traffic has the advantages that the glass fiber has the characteristics of good insulation property, strong heat resistance and good corrosion resistance through the glass fiber rope arranged in the filling layer 7, so that the wrapping tape layer 4 and the glass fiber rope are used simultaneously, the thermal protection property of the cable can be further improved, the insulation property and the corrosion resistance of the cable can be further improved, the protection effect is better, the semiconductor paper tape is arranged on the inner wall of the second insulating layer 52 and can be contacted with the cable core 6, the electric field on the outer surface of the cable core 6 can be uniform, the phenomenon that the cable core 6 and the second insulating layer 52 are subjected to partial discharge due to the unsmooth surface of the cable core 6 and an air gap generated by the twisting of the cable core 6 is avoided, the stability of current transmission of the cable is improved, the interference of current models is reduced, and the influence of external electromagnetic fields and signal fields on the cable can be effectively reduced through the woven copper wire rope arranged outside, therefore, the cable has better stability and protective performance and is more convenient for users to use.

In conclusion, in the special direct current cable for track traffic, the glass fiber rope arranged in the filling layer 7 has the characteristics of good insulation, strong heat resistance and good corrosion resistance, so that the wrapping tape layer 4 and the glass fiber rope are used simultaneously, the thermal protection property of the cable can be further improved, the insulation and the corrosion resistance of the cable can be further improved, the protection effect is better, the semiconductor paper tape is arranged on the inner wall of the second insulating layer 52 and can be contacted with the cable core 6, the electric field on the outer surface of the cable core 6 can be uniform, the phenomenon that the cable core 6 and the second insulating layer 52 generate partial discharge due to unsmooth surface of the cable core 6 and air gaps generated by twisting of the cable core 6 is avoided, the stability of current transmission of the cable is improved, the interference of current models is reduced, and the braided copper wire tape arranged outside the shielding layer 2, can effectual outside electromagnetism of reduction and the influence of signal field to this cable to make the stability and the barrier propterty of this cable better, more convenient to use person uses, solved current special type direct current cable when using, owing to use inside the track traffic, signal interference's the condition appears easily, brought inconvenience for the user, and protective effect is relatively poor when using, the problem that the user of not being convenient for used.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Special direct current cable for track traffic, including first protective sheath (1), its characterized in that: the inner wall fixed mounting of first protective sheath (1) has shielding layer (2), the inner wall fixed mounting of shielding layer (2) has inoxidizing coating (3), the inside movable mounting of inoxidizing coating (3) has second protective sheath (5), the outside winding of second protective sheath (5) has the belting layer (4) of winding that is located inoxidizing coating (3) inner wall, the inside fixed mounting of second protective sheath (5) has cable core (6), it has filling layer (7) that are located the outside of second protective sheath (5) to fill around the inside of belting layer (4), first protective sheath (1) includes restrictive coating (11), first insulating layer (12) and fire-retardant layer (13), the inner wall fixed mounting of restrictive coating (11) has fire-retardant layer (13), the inner wall fixed mounting of fire-retardant layer (13) has first insulating layer (12), second protective sheath (5) includes inner sheath (51) and second insulating layer (52), and a second insulating layer (52) is fixedly arranged on the inner wall of the inner protection layer (51).

2. A special dc cable for rail transit according to claim 1, wherein: the outer wall of the shielding layer (2) is provided with a braided copper wire belt, the braided copper wire belt uniformly covers the outside of the shielding layer (2), the inner wall of the shielding layer (2) is provided with a galvanized steel strip armor, and the thickness of the galvanized steel strip armor is not less than one millimeter.

3. A special dc cable for rail transit according to claim 1, wherein: the flame-retardant layer (13) is a flame-retardant polyvinyl chloride layer, and the thickness of the flame-retardant layer (13) is one millimeter.

4. A special dc cable for rail transit according to claim 1, wherein: restrictive coating (11) and interior sheath (51) are the polyvinyl chloride layer, and two millimeters are no less than to the thickness of restrictive coating (11), and one millimeter is no less than to the thickness of interior sheath (51).

5. A special dc cable for rail transit according to claim 1, wherein: the thicknesses of the first insulating layer (12) and the second insulating layer (52) are not more than one millimeter, and a semiconductor paper tape is arranged on the inner wall of the second insulating layer (52).

6. A special dc cable for rail transit according to claim 1, wherein: the inside of filling layer (7) is provided with the glass fiber rope, and glass fiber rope evenly distributed is in the inside around band layer (4), and the clearance between the glass fiber rope is not more than five millimeters at zero point, winds band layer (4) and is the glass fiber area, and the thickness around band layer (4) is not less than five millimeters at a point.