CN215069404U

CN215069404U - Concentric self-shielding traction cable

Info

Publication number: CN215069404U
Application number: CN202120540146.0U
Authority: CN
Inventors: 赵复明; 孙冰
Original assignee: Shanghai Ain Wire And Cable Co ltd
Current assignee: Shanghai Ain Wire And Cable Co ltd
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2021-12-07
Anticipated expiration: 2031-03-16

Abstract

The utility model discloses a concentric self-shielding traction cable, which comprises a wire core, wherein the wire core comprises a central conductor, a circle of insulating filling wire is arranged outside the central conductor, and the insulating filling wire and the central conductor are mutually twisted; the utility model discloses a cable core, including sinle silk, insulating layer, concentric conductive layer, shielding layer and protective layer, the sinle silk outside is equipped with the insulating layer, the winding has concentric conductive layer outside the insulating layer, concentric conductive layer includes the copper wire, the copper wire is equipped with insulating casing outward, concentric conductive layer outside is equipped with shielding layer and protective layer. The utility model discloses in, set up the sinle silk into central conductor and form with the transposition of insulating filler wire, make sinle silk itself have insulating properties promptly, set up the insulating layer outside the sinle silk simultaneously again, further perfect the insulating properties of sinle silk, utilize the copper wire tightly to wind on the insulating layer, make concentric conductive layer and insulating layer closely fixed, wrap up the copper wire in insulating casing in addition, avoid setting up outer insulation, make the whole radius effectively reduce to improve the practicality.

Description

Concentric self-shielding traction cable

Technical Field

The utility model relates to the technical field of cables, specifically a concentric type self-shielding traction cable.

Background

The power cable is used for transmitting and distributing electric energy, and is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and power transmission lines under river-crossing seawater.

In the power lines, the cable is increasing in specific gravity. Power cables are cable products used in the trunk lines of power systems to transmit and distribute high power electrical energy. The basic structure of the power cable is composed of four parts, namely a wire core, an insulating layer, a shielding layer and a protective layer. The core is the conductive part of the power cable, is used for transmitting electric energy, and is the main part of the power cable. The insulating layer electrically isolates the wire cores from the ground and the wire cores of different phases, thereby ensuring the electric energy transmission. Power cables of 15KV and above generally have a conductor shield and an insulation shield. The protective layer functions to protect the power cable from external impurities and moisture, and to prevent external force from directly damaging the power cable.

The existing concentric cable is thick, is not resistant to bending when the cable is pulled, is easy to break the interior of the cable, is not convenient when some wiring works are carried out, and has relatively poor adaptability. To this end, we have a concentric self-shielded traction cable.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a concentric type is from shielding traction cable to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

designing a concentric self-shielding traction cable, which comprises a wire core, wherein the wire core comprises a central conductor, a circle of insulating filling wire is arranged outside the central conductor, and the insulating filling wire and the central conductor are mutually twisted;

the utility model discloses a cable core, including sinle silk, insulating layer, concentric conductor layer, copper wire, shielding layer, the sinle silk outside is equipped with the insulating layer, the winding has concentric conductor layer outside the insulating layer, concentric conductor layer includes the copper wire, the copper wire wraps up in insulating casing, concentric conductor layer outside is equipped with the shielding layer, the crowded protective layer that wraps outward of shielding layer.

Preferably, the insulation filling line is a polyetherimide insulation filling line.

Preferably, the insulating shell is a polytetrafluoroethylene insulating shell.

Preferably, the shielding layer is a metal braid shielding layer, and the shielding layer tightly wraps the concentric conductor layer therein.

Preferably, the protective layer is a PFA plastic protective layer.

Compared with the prior art, the beneficial effects of the utility model are that: this kind of concentric type self-shielding traction cable, it forms to set up the sinle silk into the transposition of center conductor and insulating filler wire, make sinle silk itself have insulating properties promptly, set up the insulating layer outside the sinle silk again simultaneously, stop insulating filler wire because the uneven insulating dead angle that causes of transposition, further perfect the insulating properties of sinle silk, be equipped with concentric conductor layer outside the insulating layer, utilize the copper wire tightly to wind on the insulating layer, make concentric conductor layer and insulating layer closely fixed, wrap up the copper wire in insulation housing in addition, avoid setting up outer insulation, make this utility model's whole radius effectively reduce, but do not influence its performance requirement itself, it is more convenient when using, and the adaptability is stronger.

Drawings

Fig. 1 is a schematic view of a concentric self-shielding traction cable according to the present invention;

fig. 2 is a schematic cross-sectional structure view of a concentric self-shielding traction cable according to the present invention.

In the figure: the cable comprises a cable core 1, a central conductor 101, an insulating filler wire 102, an insulating layer 2, a concentric conductor layer 3, a copper wire 31, an insulating shell 310, a shielding layer 4 and a protective layer 5.

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 present invention provides a technical solution: a concentric type self-shielding traction cable comprises a wire core 1, wherein the wire core 1 comprises a central conductor 101, a circle of insulating filler wires 102 are arranged outside the central conductor 101, and the insulating filler wires 102 and the central conductor 101 are mutually twisted;

further, the insulating filler line 102 is a polyetherimide insulating filler line; the polyetherimide has excellent electrical insulation performance, flame retardance, high and low temperature resistance and also has strong toughness and strength. The high-temperature condition is certainly generated when the cable works for a long time, the polyetherimide can still keep good performance under the high-temperature condition, the polyetherimide is not easy to break under the bending condition, the mechanical property is good, and the structural integrity of the wire core 1 can be maintained.

Specifically, through setting up sinle silk 1 to central conductor 101 and insulating filler wire 102 transposition and form, make sinle silk 1 itself have insulating properties promptly, set up insulating layer 2 outside sinle silk 1 again simultaneously, stop insulating filler wire 102 because the uneven insulating dead angle that causes of transposition, further perfect sinle silk 1's insulating properties.

An insulating layer 2 is arranged on the outer side of the wire core 1, a concentric conductor layer 3 is wound on the outer side of the insulating layer 2, the concentric conductor layer 3 comprises a copper wire 31, and the copper wire 31 is wrapped in an insulating shell 310;

further, the insulating housing 310 is a teflon insulating housing; the polytetrafluoroethylene has electrical insulation and good ageing resistance, can be used for a long time, resists high and low temperature, and can still maintain good toughness at low temperature.

Specifically, be equipped with concentric conductor layer 3 outside insulating layer 2, utilize copper wire 31 tightly to twine on insulating layer 2, make concentric conductor layer 3 and insulating layer 2 closely fixed, wrap up copper wire 31 in insulating casing 32 in addition, avoid setting up outer insulation, make this utility model's whole radius effectively reduce, but do not influence the performance requirement of its own, it is more convenient when the use, and the adaptability is stronger.

A shielding layer 4 is arranged on the outer side of the concentric conductor layer 3;

further, the shielding layer 4 is a metal braid shielding layer, and the shielding layer 4 tightly wraps the concentric conductor layer 3 therein; the shielding layer of the existing cable is mostly made of metal braided fabric, the technology is relatively mature, and the requirements of cables of various types on anti-interference performance can be met.

The shielding layer 4 is externally extruded with a protective layer 5;

further, the protective layer 5 is a PFA plastic protective layer 5; the PFA plastic has good insulating property, the electrical insulation property of the PFA plastic is not influenced by temperature, the compression strength is better than that of polytetrafluoroethylene, the tensile strength is higher, the radiation resistance is excellent, the flame retardance is strong, the corrosion resistance is realized, the friction coefficient is extremely low, and the PFA plastic can provide a sufficient protection effect for an inner layer structure.

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. A concentric self-shielding traction cable comprises a wire core (1), and is characterized in that: the cable core (1) comprises a central conductor (101), a circle of insulating filling line (102) is arranged outside the central conductor (101), and the insulating filling line (102) and the central conductor (101) are mutually twisted;

the utility model discloses a cable core, including sinle silk (1) outside, insulating layer (2) outside winding has concentric conductor layer (3), concentric conductor layer (3) include copper wire (31), copper wire (31) wrap up in insulating casing (310), concentric conductor layer (3) outside is equipped with shielding layer (4), shielding layer (4) outer crowded package protective layer (5).

2. The concentric self-shielded traction cable of claim 1, wherein: the insulation filling line (102) is set to be a polyetherimide insulation filling line.

3. The concentric self-shielded traction cable of claim 1, wherein: the insulating shell (310) is a polytetrafluoroethylene insulating shell.

4. The concentric self-shielded traction cable of claim 1, wherein: the shielding layer (4) is a metal braided fabric shielding layer, and the concentric conductor layer (3) is tightly wrapped in the shielding layer (4).

5. The concentric self-shielded traction cable of claim 1, wherein: the protective layer (5) is a PFA plastic protective layer (5).