CN217113877U

CN217113877U - 27.5kV electrified railway is with level and smooth aluminium sheath cable

Info

Publication number: CN217113877U
Application number: CN202220939627.3U
Authority: CN
Inventors: 郭姣
Original assignee: Xinchengrui Cable Co ltd
Current assignee: Xinchengrui Cable Co ltd
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2022-08-02
Anticipated expiration: 2032-04-22

Abstract

The utility model discloses a 27.5kV smooth aluminum sheath cable for electrified railway, which relates to the technical field of cables and comprises a conductor body, wherein the outer surface of the conductor body is provided with a sheath structure, the sheath structure comprises a conductor shielding layer arranged on the outer surface of the conductor body, the outer surface of the conductor shielding layer is provided with an insulating layer, the outer surface of the insulating layer is provided with an insulating shielding layer, the outer surface of the insulating shielding layer is provided with a buffering water-blocking tape, the outer surface of the buffering water-blocking tape is provided with a flat aluminum sheath, the outer surface of the flat aluminum sheath is provided with an outer sheath, the inner diameter of the conductor shielding layer is equal to the diameter of the conductor body, and the inner diameter of the insulating layer is equal to the outer diameter of the conductor shielding layer in size, the utility model solves the problems that the existing 27.5kV cable for electrified railway can discharge in the using process, the leaked current can cause the insulation shielding to burn and is not beneficial to the permanent use of the cable, and the inner surface of the aluminum sheath of the burn part can generate corrosion problem.

Description

Smooth aluminum sheath cable for 27.5kV electrified railway

Technical Field

The utility model relates to the technical field of cables, specifically be a 27.5kV electrified railway is with level and smooth aluminium sheath cable.

Background

At present, the existing cable for the 27.5kV electrified railway can discharge in the using process, the leaked current can burn the insulation shield, the cable is not beneficial to long-term use, the inner surface of the aluminum sheath at the burnt part can be corroded, and the service life of the cable is influenced, so that the working personnel in the field provide the smooth aluminum sheath cable for the 27.5kV electrified railway.

SUMMERY OF THE UTILITY MODEL

To prior art not enough, the utility model provides a 27.5kV electrified railway is with level and smooth aluminium sheath cable, the effectual problem of mentioning in having solved above-mentioned background art.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a smooth aluminum sheath cable for a 27.5kV electrified railway comprises a conductor body, wherein a sheath structure is arranged on the outer surface of the conductor body;

the sheath structure comprises a conductor shielding layer arranged on the outer surface of the conductor body, an insulating layer is arranged on the outer surface of the conductor shielding layer, an insulating shielding layer is arranged on the outer surface of the insulating layer, a buffering water-blocking tape is arranged on the outer surface of the insulating shielding layer, a flat aluminum sheath is arranged on the outer surface of the buffering water-blocking tape, and an outer sheath is arranged on the outer surface of the flat aluminum sheath.

As a further technical scheme of the utility model, the internal diameter of conductor shielding layer equals with the diameter size of conductor body, the internal diameter of insulating layer equals with the external diameter size of conductor shielding layer.

As a further technical scheme of the utility model, the internal diameter of insulating shield equals with the external diameter size of insulating layer, the internal diameter of buffering water-blocking tape equals with the external diameter size of insulating shield.

As a further technical scheme of the utility model, the internal diameter of flat aluminium sheath equals with the external diameter size of buffering water-blocking tape, the internal diameter of oversheath equals with the external diameter size of flat aluminium sheath.

As a further technical scheme of the utility model, the insulating and shielding layer is graphite nylon laminated structure.

As a further technical scheme of the utility model, it is inseparable to laminate each other between conductor body and the conductor shielding layer, it is inseparable to laminate each other between adjacent two sets of stratiform subassemblies of conductor shielding layer, insulating layer, insulation shield, buffering water-blocking tape, flat aluminium sheath and oversheath.

As a further technical scheme of the utility model, the oversheath is low smoke and zero halogen sheath.

Advantageous effects

The utility model provides a 27.5kV electrified railway is with level and smooth aluminium sheath cable. Compared with the prior art, the method has the following beneficial effects:

this design is a 27.5kV electrified railway with level and smooth aluminium sheath cable, effect through the sheath structure, the clearance between flat aluminium sheath and the buffering water-blocking tape has been reduced, improve flat aluminium sheath's roundness, power cable holistic roundness is better, effectual solved in the cable use because of discharging, the condition of insulating barrier department emergence burn is made to the leakage current, and the flat aluminium sheath internal surface that produces the burn position produces the phenomenon of corroding, can make the result of use of cable better, the security is stronger, can effectively prolong the life of cable simultaneously.

Drawings

FIG. 1 is a schematic structural view of a smooth aluminum-sheathed cable for 27.5kV electrified railways;

fig. 2 is a partial side cross-sectional view of a smooth aluminum jacketed cable for 27.5kV electrified railways.

In the figure: 1. a conductor body; 2. a sheath structure; 21. a conductor shield layer; 22. an insulating layer; 23. an insulating shield layer; 24. buffering the water blocking tape; 25. a flat aluminum sheath; 26. an outer sheath.

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, the utility model provides a technical scheme of a smooth aluminum sheath cable for 27.5kV electrified railway: the utility model provides a 27.5kV electric railway is with level and smooth aluminium sheath cable, includes conductor body 1, and conductor body 1's surface is provided with sheath structure 2, and conductor body 1 is the cable core that many copper lines were made.

Referring to fig. 2, the sheath structure 2 includes a conductor shielding layer 21 disposed on an outer surface of the conductor body 1, an insulating layer 22 is disposed on the outer surface of the conductor shielding layer 21, an insulating shielding layer 23 is disposed on the outer surface of the insulating layer 22, a buffering water-blocking tape 24 is disposed on the outer surface of the insulating shielding layer 23, a flat aluminum sheath 25 is disposed on the outer surface of the buffering water-blocking tape 24, an outer sheath 26 is disposed on the outer surface of the flat aluminum sheath 25, an inner diameter of the conductor shielding layer 21 is equal to a diameter of the conductor body 1, an inner diameter of the insulating layer 22 is equal to an outer diameter of the conductor shielding layer 21, the conductor shielding layer 21 mainly functions to equalize a surface electric field of the conductor body 1, so as to prevent a gap between the conductor body 1 and the insulating layer 22 from causing a local discharge, the inner diameter of the insulating shielding layer 23 is equal to the outer diameter of the insulating layer 22, the inner diameter of the buffering water-blocking tape 24 is equal to the outer diameter of the insulating shielding layer 23, the inner diameter of the flat aluminum sheath 25 is equal to the outer diameter of the buffering water-blocking tape 24, the inner diameter of the outer sheath 26 is equal to the outer diameter of the flat aluminum sheath 25, the insulating shielding layer 23 is of a graphite nylon laminated structure, the insulating shielding layer 23 provides guarantee for the safety and reliability of power supply of a cable line, the conductor body 1 and the conductor shielding layer 21 are tightly attached to each other, the conductor shielding layer 21, the insulating layer 22, the insulating shielding layer 23, the buffering water-blocking tape 24, the two adjacent groups of laminated assemblies of the flat aluminum sheath 25 and the outer sheath 26 are tightly attached to each other, the outer sheath 26 is a halogen-free low-smoke sheath, through the effect of the sheath structure 2, the gap between the flat aluminum sheath 25 and the buffering water-blocking tape 24 is reduced, the roundness of the flat aluminum sheath 25 is improved, the integral roundness of the power cable is better, and the problem that the insulating shielding layer 23 is burnt due to discharge and leakage current in the use process of the cable is effectively solved, and the inner surface of the flat aluminum sheath 25 at the position where the burn occurs is corroded, so that the using effect of the cable is better, and the service life of the cable can be effectively prolonged.

The utility model discloses a theory of operation: through conductor shielding layer 21, insulating layer 22, insulation shield 23, buffering water blocking tape 24, the mode that sets up of flat aluminium sheath 25 and oversheath 26, compare current cable and reduced the clearance between flat aluminium sheath 25 and buffering water blocking tape 24, improve flat aluminium sheath 25's roundness, the holistic roundness of power cable is better, effectually solved because of discharging in the cable use, leakage current makes insulation shield 23 department take place the condition of burning, and produce the flat aluminium sheath 25 internal surface of burning position and produce the phenomenon of corroding, can make the result of use of cable better, can effectively prolong the life of cable simultaneously, the security effect is better.

Claims

1. The smooth aluminum sheath cable for the 27.5kV electrified railway is characterized by comprising a conductor body (1), wherein a sheath structure (2) is arranged on the outer surface of the conductor body (1);

the jacket structure (2) comprises a conductor shielding layer (21) arranged on the outer surface of the conductor body (1), an insulating layer (22) is arranged on the outer surface of the conductor shielding layer (21), an insulating shielding layer (23) is arranged on the outer surface of the insulating layer (22), a buffering water-blocking tape (24) is arranged on the outer surface of the insulating shielding layer (23), a flat aluminum jacket (25) is arranged on the outer surface of the buffering water-blocking tape (24), and an outer jacket (26) is arranged on the outer surface of the flat aluminum jacket (25).

2. The smooth aluminum-sheathed cable for 27.5kV electrified railways according to claim 1, characterized in that the inner diameter of the conductor shielding layer (21) is equal to the diameter of the conductor body (1), and the inner diameter of the insulating layer (22) is equal to the outer diameter of the conductor shielding layer (21).

3. The smooth aluminum-sheathed cable for 27.5kV electrified railways according to claim 2, characterized in that the inner diameter of the insulation shielding layer (23) is equal to the outer diameter of the insulation layer (22), and the inner diameter of the buffer water-blocking tape (24) is equal to the outer diameter of the insulation shielding layer (23).

4. The smooth aluminum-sheathed cable for 27.5kV electrified railways according to claim 3, characterized in that the inner diameter of the flat aluminum sheath (25) is equal to the outer diameter of the buffer water-blocking tape (24), and the inner diameter of the outer sheath (26) is equal to the outer diameter of the flat aluminum sheath (25).

5. The smooth aluminum-jacketed cable for 27.5kV electrified railways according to claim 1, characterized in that the insulation shielding layer (23) is of a graphite nylon laminated structure.

6. The smooth aluminum-sheathed cable for the 27.5kV electrified railways according to claim 1, characterized in that the conductor body (1) and the conductor shielding layer (21) are tightly attached to each other, and two adjacent sets of the layered assemblies of the conductor shielding layer (21), the insulating layer (22), the insulating shielding layer (23), the buffering water-blocking tape (24), the flat aluminum sheath (25) and the outer sheath (26) are tightly attached to each other.

7. The smooth aluminum-sheathed cable for 27.5kV electrified railways according to claim 1, characterized in that the outer sheath (26) is a low-smoke zero-halogen sheath.