CN212392019U

CN212392019U - Torsion-resistant power cable

Info

Publication number: CN212392019U
Application number: CN202021239885.8U
Authority: CN
Inventors: 徐刚
Original assignee: Jiangsu Mingyang Cable Co ltd
Current assignee: Jiangsu Mingyang Cable Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-01-22
Anticipated expiration: 2030-06-30

Abstract

The utility model relates to a resistant power cable that twists reverse. The cable comprises three power wire cores, wherein the three power wire cores are composed of conductors, insulating layers, shielding layers and sub-sheaths, the insulating layers are arranged outside the conductors, the shielding layers are arranged outside the insulating layers, and the sub-sheaths are arranged outside the shielding layers; the middle of each power wire core is provided with an elastic supporting sleeve, the elastic supporting sleeve is arranged among the three power wire cores and is contacted with the power wire cores, and three elastic supporting tubes are arranged in the elastic supporting sleeve; filling filler is filled in gaps between the elastic support sleeve and the three power wire cores; a wrapping tape is arranged outside the three power wire cores together, a vacuum heat insulation layer is arranged outside the wrapping tape, an inner sheath is arranged outside the vacuum heat insulation layer, a flame retardant layer is arranged outside the inner sheath, and an outer sheath is arranged outside the flame retardant layer; a plurality of fixing columns are arranged between the inner sheath and the outer sheath. The utility model discloses compact structure, intensity are high, resistant dilatory, resistant distortion, flame retardant efficiency are good.

Description

Torsion-resistant power cable

Technical Field

The utility model relates to a power cable especially relates to a resistant power cable that twists reverse.

Background

At present, with the continuous development of ships, ports, mines and rolling stocks in China, the requirements on facilities in the industries are higher and higher due to safety considerations, cables play a very important role in the industries, and the cables have enough flexibility and strong tensile strength in the occasions. At present, steel wires are mainly adopted for weaving and reinforcing, the cable is easy to cause steel wire breakage in the frequent moving process, insulation is possibly contused in case of wire breakage, and accordingly short circuit is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a compact structure, intensity height, resistant dilatory, resistant distortion, resistant torsion-resistant power cable that flame retardant efficiency is good.

The technical scheme of the utility model is that: a torsion-resistant power cable comprises three power wire cores, wherein each power wire core consists of a conductor, an insulating layer, a shielding layer and a sub-sheath, the insulating layer is arranged outside the conductor, the shielding layer is arranged outside the insulating layer, and the sub-sheath is arranged outside the shielding layer;

the middle of each power wire core is provided with an elastic supporting sleeve, the elastic supporting sleeve is arranged among the three power wire cores and is contacted with the power wire cores, and three elastic supporting tubes are arranged in the elastic supporting sleeve;

filling filler is filled in gaps between the elastic support sleeve and the three power wire cores;

a wrapping tape is arranged outside the three power wire cores together, a vacuum heat insulation layer is arranged outside the wrapping tape, an inner sheath is arranged outside the vacuum heat insulation layer, a flame retardant layer is arranged outside the inner sheath, and an outer sheath is arranged outside the flame retardant layer;

a plurality of fixing columns are arranged between the inner sheath and the outer sheath.

Furthermore, the elastic supporting tube takes the central line of two adjacent power wire cores as an axis, and two ends of the supporting tube are in contact with the inner wall of the elastic supporting sleeve.

Furthermore, the insulating layer is a crosslinked polyethylene insulating layer.

Further, the filler is mica powder or mica fiber.

Furthermore, the wrapping tape is an alkali-free glass fiber wrapping tape.

Furthermore, the inner sheath is a ceramic polyolefin inner sheath, and the outer sheath is a halogen-free low-smoke flame-retardant polyolefin outer sheath.

Furthermore, the fixing column penetrates through the flame-retardant layer, one end of the fixing column is fixed in the inner sheath, the other end of the fixing column is fixed in the outer sheath, and the fixing column is a rubber fixing column.

The utility model has the advantages that:

1. the elastic supporting sleeve is arranged among the three power wire cores, so that the three power wire cores are supported and protected, the strength of the cable core is improved, and meanwhile, the elastic supporting tubes are respectively arranged at the three ends of the elastic supporting sleeve, so that the elastic supporting sleeve is supported and protected;

2. set up a plurality of fixed columns between inner sheath and oversheath, the both ends of fixed column are fixed respectively and are integrated in inner sheath and oversheath, and a plurality of fixed columns set up according to the radial direction of cable, and when the oversheath receives external force and takes place to twist reverse or the extrusion, the fixed column can reduce the torsional dynamics of cable to effectively increase the resistant ability of twisting of cable, simultaneously, the fixed column is made for rubber, and the fixed column main part sets up in fire-retardant layer, and fire-retardant layer can play fine flame retardant action to the fixed column main part.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure, 1 is a conductor, 2 is an insulating layer, 3 is a shielding layer, 4 is a branch sheath, 5 is an elastic supporting sleeve, 6 is an elastic supporting tube, 7 is a filler, 8 is a wrapping tape, 9 is a vacuum heat insulation layer, 10 is an inner sheath, 11 is a flame retardant layer, 12 is an outer sheath, and 13 is a fixing column.

Detailed Description

A torsion-resistant power cable comprises three power wire cores, wherein each power wire core comprises a conductor 1, an insulating layer 2, a shielding layer 3 and a sub-sheath 4, the insulating layer 2 is arranged outside the conductor 1, the shielding layer 3 is arranged outside the insulating layer 2, and the sub-sheath 4 is arranged outside the shielding layer 3;

the middle of each power wire core is provided with an elastic supporting sleeve 5, each elastic supporting sleeve 5 is arranged among the three power wire cores and is in contact with the power wire cores, the three power wire cores are supported and protected, the strength of the cable core is improved, and the three elastic supporting tubes 5 are arranged in each elastic supporting sleeve 5;

the filling material 7 is filled in the gaps between the elastic support sleeve 5 and the three power wire cores;

the cable comprises three power wire cores, a wrapping tape 8, a vacuum heat insulation layer 9, an inner sheath 10, a flame retardant layer 11 and an outer sheath 12, wherein the wrapping tape 8 is arranged outside the three power wire cores to form a cable core, the vacuum heat insulation layer 9 is arranged outside the wrapping tape 8, the inner sheath 10 is arranged outside the vacuum heat insulation layer 9, the flame retardant layer 11 is arranged outside the inner sheath 10, and the outer sheath 12 is arranged outside the flame retardant layer;

a plurality of fixing columns 13 are arranged between the inner sheath 10 and the outer sheath 12.

The elastic supporting tubes 6 take the central lines of two adjacent power wire cores as axes, two ends of each elastic supporting tube 6 are in contact with the inner wall of the elastic supporting sleeve 5, and the three elastic supporting tubes 6 are arranged at the end parts of the elastic supporting sleeves 5 and play a role in supporting and protecting the elastic supporting sleeves 5.

The insulating layer 2 is a crosslinked polyethylene insulating layer.

The filler 7 is mica powder or mica fiber.

The wrapping tape 8 is an alkali-free glass fiber wrapping tape.

The inner sheath 10 is a ceramic polyolefin inner sheath, and the outer sheath 12 is a halogen-free low-smoke flame-retardant polyolefin outer sheath.

The fixing posts 13 are arranged in the radial direction of the cable, when the outer sheath 12 is twisted or extruded by external force, the fixing posts 13 can reduce the twisting force of the cable, so that the twisting resistance of the cable is effectively improved, the fixing posts 13 penetrate through the flame-retardant layer 11, one ends of the fixing posts 13 are fixed in the inner sheath 12, the other ends of the fixing posts 13 are fixed in the outer sheath 12, the fixing posts 13 are rubber fixing posts, the main bodies of the fixing posts 13 are arranged in the flame-retardant layer 11, and the flame-retardant layer 11 can play a good flame-retardant role in the main bodies of the fixing posts 13.

In the description of the present invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

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 torsion-resistant power cable is characterized in that: the cable comprises three power wire cores, wherein the three power wire cores are composed of a conductor (1), an insulating layer (2), a shielding layer (3) and a sub-sheath (4), the insulating layer (2) is arranged outside the conductor (1), the shielding layer (3) is arranged outside the insulating layer (2), and the sub-sheath (4) is arranged outside the shielding layer (3);

an elastic supporting sleeve (5) is arranged in the middle of each power wire core, the elastic supporting sleeve (5) is arranged among the three power wire cores and is in contact with the power wire cores, and three elastic supporting tubes (6) are arranged in the elastic supporting sleeve (5);

filling materials (7) are filled in gaps between the elastic support sleeve (5) and the three power wire cores;

a wrapping tape (8) is arranged outside the three power wire cores together, a vacuum heat-insulating layer (9) is arranged outside the wrapping tape (8), an inner sheath (10) is arranged outside the vacuum heat-insulating layer (9), a flame-retardant layer (11) is arranged outside the inner sheath (10), and an outer sheath (12) is arranged outside the flame-retardant layer (11);

a plurality of fixing columns (13) are arranged between the inner sheath (10) and the outer sheath (12).

2. A torsion resistant power cable according to claim 1, wherein: the elastic supporting tube (6) takes the central lines of two adjacent power wire cores as the axis, and two ends of the elastic supporting tube (6) are in contact with the inner wall of the elastic supporting sleeve (5).

3. A torsion resistant power cable according to claim 1, wherein: the insulating layer (2) is a crosslinked polyethylene insulating layer.

4. A torsion resistant power cable according to claim 1, wherein: the filler (7) is mica powder or mica fiber.

5. A torsion resistant power cable according to claim 1, wherein: the wrapping tape (8) is an alkali-free glass fiber wrapping tape.

6. A torsion resistant power cable according to claim 1, wherein: the inner sheath (10) is a ceramic polyolefin inner sheath, and the outer sheath (12) is a halogen-free low-smoke flame-retardant polyolefin outer sheath.

7. A torsion resistant power cable according to claim 1, wherein: the fixing columns (13) penetrate through the flame-retardant layer (11), one end of each fixing column is fixed in the inner sheath (10), the other end of each fixing column is fixed in the outer sheath (12), and the fixing columns (13) are rubber fixing columns.