CN218548027U

CN218548027U - Medium-voltage polypropylene insulated power cable

Info

Publication number: CN218548027U
Application number: CN202221868484.8U
Authority: CN
Inventors: 李继超; 李云峰; 李树梅; 李喜喜; 孔爱红; 路红媛
Original assignee: Kunming Plastic Cable Co ltd
Current assignee: Kunming Plastic Cable Co ltd
Priority date: 2022-07-20
Filing date: 2022-07-20
Publication date: 2023-02-28
Anticipated expiration: 2032-07-20

Abstract

The utility model discloses a middling pressure polypropylene insulation power cable, including a plurality of conductors, it is a plurality of be provided with the obturator between the conductor, it is a plurality of the outside of conductor and obturator has set gradually bandage, bed course, armor and oversheath, the oversheath outside is provided with wear-resisting area, wear-resisting area is including the area body, the area body outside is provided with the friction rib, the utility model discloses a set up wear-resisting area in the cable oversheath outside, when the cable is pull, utilize the friction rib of wear-resisting area to make the cable oversheath when pulling with contact surface isolation department certain interval, through friction rib and contact surface frictional contact, reduce the friction of cable oversheath and contact surface, prevent that the condition of wearing and tearing from appearing when pulling in the cable oversheath, guarantee cable safety in the use, improve the whole life of cable, wear-resisting area sets up to the degradable material simultaneously, can slowly degrade in the use of later stage, when the outer environment of pollution, prevents that the cable non-staining from influencing the cable heat dissipation excessively thickly.

Description

Medium-voltage polypropylene insulated power cable

Technical Field

The utility model belongs to the technical field of the cable, concretely relates to insulating power cable of middling pressure polypropylene.

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 in 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 electric power systems for transmission and distribution of high power electric energy, including various voltage classes of 1-500KV and above, and various insulated power cables, and medium voltage power cables refer to power cables of 35 KV and below.

In the laying, traction and pipe penetrating processes of medium-voltage cables, the phenomenon that an outer sheath and even a steel armor are abraded sometimes occurs, the phenomenon is particularly prominent when mechanical traction is used, the outer sheath is damaged and cannot be seen easily sometimes, and after the medium-voltage cables are used for several months or one year, the damaged part can be thoroughly punctured to form a fault; and when the abrasion part is serious, the cable is polluted greatly after water enters, and the cable is good either for the cable or for the line. Once moisture or water enters the cable insulation from the cable end or the cable outer protective layer, it is possible to vertically penetrate from the gaps shielded by the copper wires or the conductor gaps, thereby endangering the entire cable system, and if it is ensured that the outer sheath is not worn, the thickness of the outer sheath is sufficient, but at high temperatures in summer, the cable sheath is too thick, and these heat may be hardly emitted, resulting in heat generation. This not only can influence cable life-span, influence the circuit normal operating, still easy emergence electrical accident.

An effective solution to the problems in the related art has not been proposed yet.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides a middling pressure polypropylene insulation power cable when possessing the whole wear resistance of increase power cable, plays the degradable after laying and does not influence the radiating advantage of cable.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a middling pressure polypropylene insulation power cable, includes a plurality of conductors, and is a plurality of be provided with the obturator between the conductor, it is a plurality of the outside of conductor and obturator has set gradually bandage, bed course, armor and oversheath, the oversheath outside is provided with wear-resisting area, wear-resisting area is including the area body, the area body outside is provided with the friction rib.

As an optimized technical proposal of the utility model, the wear-resistant belt is a continuous sheet and is spirally wound outside the outer sheath.

As an optimized technical scheme of the utility model, the friction rib cross-section is trapezoidal, and wholly is hollow structure.

As an optimal technical scheme of the utility model, wear-resisting whole degradable material that is of area.

As the utility model discloses an optimized technical scheme, the conductor includes the sinle silk, the sinle silk outside is provided with the internal shield layer, the internal shield layer outside is provided with the insulating layer, the insulating layer outside is provided with the external shield layer.

As an optimized technical scheme of the utility model, insulating layer and obturator material are polypropylene.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a set up wear-resisting area in the cable oversheath outside, when the cable is pulled, the friction rib that utilizes wear-resisting area makes the cable oversheath when pulling with the contact surface certain interval of keeping apart, through friction rib and contact surface frictional contact, reduce the friction of cable oversheath and contact surface, prevent that the condition of wearing and tearing from appearing in the cable oversheath when pulling, guarantee cable safety in the use, improve the whole life of cable, wear-resisting area sets up to degradable material simultaneously, can slowly degrade in the later stage use, in the time of non-staining environment, prevent that the outer overthickness of cable from influencing the cable heat dissipation.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and 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 and not to limit the invention. In the drawings:

fig. 1 is a schematic sectional structure of the present invention;

FIG. 2 is a schematic structural view of the outer side of the power cable of the present invention;

in the figure: 1. a filler; 2. binding bands; 3. a cushion layer; 4. an armor layer; 5. an outer sheath; 6. A wear-resistant band; 7. a belt body; 8. a friction rib; 9. a wire core; 10. an inner shield layer; 11. an insulating layer; 12. and an outer shielding layer.

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.

Examples

Referring to fig. 1-2, the present invention provides the following technical solutions: the utility model provides a middling pressure polypropylene insulation power cable, includes a plurality of conductor, it is a plurality of be provided with obturator 1 between the conductor, it is a plurality of bandage 2, bed course 3, armor 4 and oversheath 5 have set gradually in the outside of conductor and obturator 1, the oversheath 5 outside is provided with wear-resisting area 6, wear-resisting area 6 is including the area body 7, the area body 7 outside is provided with friction rib 8, wear-resisting area 6 is that an uninterrupted sheet is the heliciform winding in the oversheath 5 outside, in this embodiment, through set up wear-resisting area 6 in the cable oversheath 5 outside, when the cable is pull, utilize the friction rib 8 of wear-resisting area 6 to make cable oversheath 5 when pulling with the certain interval of contact surface isolation, through friction rib 8 and contact surface frictional contact, reduce the friction of cable oversheath 5 and contact surface, prevent that cable oversheath 5 from the condition of wearing and tearing from appearing when pulling, ensure the safety of cable in the use, improve the whole life of cable.

In order to improve the interval that increases cable oversheath 5 and contact surface, prevent cable oversheath 5 contact, in this embodiment, as the utility model discloses a preferred technical scheme, 8 cross-sections of friction rib are trapezoidal, and wholly are hollow structure.

For the convenience of wear-resisting 6 later stages of taking degradation, when the non-staining environment, the heat dissipation capacity of improvement cable, in this embodiment, as the utility model discloses an optimal technical scheme, wear-resisting 6 whole degradable materials that are of taking.

In order to have insulating properties's difficult ageing convenient to retrieve in the time, double-deck shielding improves and prevents to influence mutually between the cable, in this embodiment, as the utility model discloses a preferred technical scheme, the conductor includes sinle silk 9, the sinle silk 9 outside is provided with internal shield layer 10, the internal shield layer 10 outside is provided with insulating layer 11, the 11 outsides of insulating layer are provided with external shield 12, insulating layer 11 and 1 material of obturator are polypropylene.

Finally, it should be noted that: in the present invention, unless otherwise explicitly specified or limited, the terms "mounted", "disposed", "connected", "fixed", "screwed" and the like are to be understood broadly, and may be, for example, a fixed connection, a detachable connection, or an integral body; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate medium, and may be used for communicating the inside of two elements or for interacting with each other, unless otherwise specifically defined, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to the specific circumstances.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a middling pressure polypropylene insulation power cable, includes a plurality of conductors, and is a plurality of be provided with obturator (1) between the conductor, it is a plurality of bandage (2), bed course (3), armor (4) and oversheath (5) have set gradually in the outside of conductor and obturator (1), its characterized in that: the wear-resistant belt is characterized in that a wear-resistant belt (6) is arranged on the outer side of the outer sheath (5), the wear-resistant belt (6) comprises a belt body (7), and friction ribs (8) are arranged on the outer side of the belt body (7).

2. A medium voltage polypropylene insulated power cable according to claim 1, characterized in that: the wear-resistant belt (6) is an uninterrupted sheet and is wound on the outer side of the outer sheath (5) in a spiral shape.

3. A medium voltage polypropylene insulated power cable according to claim 2, characterized in that: the section of the friction rib (8) is trapezoidal, and the whole friction rib is of a hollow structure.

4. A medium voltage polypropylene insulated power cable according to claim 3, characterized in that: the whole wear-resistant belt (6) is made of degradable materials.

5. A medium voltage polypropylene insulated power cable according to claim 1, characterized in that: the conductor comprises a wire core (9), wherein an inner shielding layer (10) is arranged on the outer side of the wire core (9), an insulating layer (11) is arranged on the outer side of the inner shielding layer (10), and an outer shielding layer (12) is arranged on the outer side of the insulating layer (11).

6. A medium voltage polypropylene insulated power cable according to claim 5, characterized in that: the insulating layer (11) and the filling body (1) are both made of polypropylene.