CN215834271U

CN215834271U - Flat type stretching-resistant low-voltage power cable

Info

Publication number: CN215834271U
Application number: CN202121640928.8U
Authority: CN
Inventors: 孙波
Original assignee: Wuxi Wanhan Cable Co ltd
Current assignee: Wuxi Wanhan Cable Co ltd
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2022-02-15
Anticipated expiration: 2031-07-19

Abstract

The utility model relates to the technical field of power cables, in particular to a flat tensile low-voltage power cable which comprises three groups of cable cores and a support frame, wherein the three groups of cable cores are linearly arranged, the support frame is spiral, limiting grooves matched with the cable cores are formed in the left side and the right side of the lower end and the middle of the upper end of the support frame, steel wire strips are arranged on the left side and the right side of each cable core, each cable core sequentially comprises a conductor, an inner shielding layer, an insulating layer and an outer shielding layer from inside to outside, and a wrapping layer is arranged on the outer sides of the three groups of cable cores. The three groups of cable cores are separated by the support frame, the structural strength of the cable is enhanced, the cable is prevented from being damaged by dragging, dragging and twisting in the erection process, and the cable and the steel wire strip act together, so that the stretching resistance of the cable is improved; the flame retardant property of the cable is improved by the arrangement of the filling layer and the flame retardant layer; through the arrangement of the buffer layer and the cavity in the buffer layer, the buffer effect is achieved, and the damage of strong impact force to the cable is reduced.

Description

Flat type stretching-resistant low-voltage power cable

Technical Field

The utility model relates to the technical field of power cables, in particular to a flat tensile low-voltage power 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. With the development of the power and energy industries, various cables are increasingly applied to various fields of production and life, the conventional flat cable is generally flat in section, single in structure and poor in stretching resistance, and is easy to break when being dragged, twisted or under the action of tensile force. Therefore, a flat tensile-resistant low-voltage power cable is provided.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a flat anti-stretching low voltage power cable, so as to solve the problems mentioned in the background art.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a flat tensile low voltage power cable, includes three cable cores of group and support frame, three groups the cable core is the inline setting, the support frame is the heliciform, support frame lower extreme left and right sides and upper end middle part all be equipped with cable core assorted spacing groove, the cable core left and right sides all is provided with the steel wire strip, the cable core from interior to exterior includes conductor, inner shield layer, insulating layer and outer shielding layer in proper order, three groups the cable core outside is provided with around the covering, it has the filling layer to fill around the space department between covering and the cable core, be provided with the inner sheath layer around the covering outside, the inner sheath layer outside is provided with fire-retardant coating, the fire-retardant coating outside is provided with the buffer layer, the buffer layer outside is provided with the steel band armor, the steel band armor layer outside is provided with the oversheath layer.

As a further optimization of the technical scheme, the filling layer is a magnesium oxide mineral filling layer.

As a further optimization of the technical scheme, the flame-retardant layer is a low-smoke halogen-free glass fiber tape layer.

As a further optimization of the technical scheme, cavities are uniformly formed in the buffer layer.

As a further optimization of the technical scheme, the upper side wall and the lower side wall of the outer sheath layer are both provided with grooves which are sunken inwards between the two adjacent groups of cable cores.

As a further optimization of the technical scheme, the inner sheath layer and the outer sheath layer are both low-smoke halogen-free polyolefin sheath layers.

Compared with the prior art, the utility model has the beneficial effects that: the three groups of cable cores are separated by the support frame, the structural strength of the cable is enhanced, the cable is prevented from being damaged by dragging, dragging and twisting in the erection process, and the cable and the steel wire strip act together, so that the stretching resistance of the cable is improved; the flame retardant property of the cable is improved by the arrangement of the filling layer and the flame retardant layer; the buffer layer and the cavity in the buffer layer are arranged to play a role in buffering, so that the damage of strong impact force to the cable is reduced; the arrangement of the steel tape armor layer increases the mechanical strength of the cable, improves the anti-corrosion capability and prolongs the service life of the cable; through the setting of inner sheath layer and oversheath layer, play dual fire-retardant, the effect that the separation cigarette volume distributes.

Drawings

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

FIG. 2 is a schematic structural diagram of a cable core according to the present invention;

fig. 3 is a schematic view of the supporting frame of the present invention.

In the figure: 1. a cable core; 101. a conductor; 102. an inner shield layer; 103. an insulating layer; 104. an outer shield layer; 2. a support frame; 3. a limiting groove; 4. a steel wire strip; 5. wrapping a covering; 6. a filling layer; 7. an inner jacket layer; 8. a flame retardant layer; 9. a buffer layer; 10. a steel tape armor layer; 11. an outer jacket layer; 12. a cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a flat anti low voltage power cable that stretches, includes three cable cores 1 and support frame 2 of group, three groups cable core 1 is the inline setting, support frame 2 is the heliciform, 2 lower extreme left and right sides of support frame and upper end middle part all be equipped with 1 assorted spacing groove 3 of cable core, 1 left and right sides of cable core all is provided with steel wire strip 4, separates three cable cores 1 of group through support frame 2, strengthens the structural strength of cable, prevents that the cable from dragging, twisting and causing the damage to the cable in the process of erectting, with 4 combined action of steel wire strip, has improved the anti tensile performance of cable.

The cable core 1 sequentially comprises a conductor 101, an inner shielding layer 102, an insulating layer 103 and an outer shielding layer 104 from inside to outside, and the cable core 1 is of a double shielding structure, so that the use safety of the cable is improved.

Three groups the 1 outside of cable core is provided with around covering 5, it has filling layer 6 to fill around the gap department between covering 5 and the cable core 1, filling layer 6 is magnesium oxide mineral matter filling layer, has fire prevention, fire-resistant, high temperature resistant, separates the advantage of temperature and thermal-insulated to the flame retardant property of cable has been improved.

An inner sheath layer 7 is arranged on the outer side of the wrapping layer 5, a flame-retardant layer 8 is arranged on the outer side of the inner sheath layer 7, the flame-retardant layer 8 is a low-smoke halogen-free glass fiber tape layer, and the cable is high in heat resistance, small in moisture absorption, soft and high in tensile strength, so that the flame-retardant tensile performance of the cable is improved. The outer side of the flame-retardant layer 8 is provided with a buffer layer 9, cavities 12 are uniformly formed in the buffer layer 9, a buffer effect is achieved, and damage to the cable caused by strong impact force is reduced. Buffer layer 9 outside is provided with steel band armor 10, increases the mechanical strength of cable, improves anti-corrosion ability, improves the life of cable, the steel band armor 10 outside is provided with oversheath layer 11, inner sheath layer 7 and oversheath layer 11 are low smoke and zero halogen polyolefin restrictive coating, and high temperature resistant, flame retardant property is good to low cigarette, it is little to pollute.

Specifically, the upper side wall and the lower side wall of the outer sheath layer 11 are located at two adjacent groups, grooves are formed between the cable cores 1 in a recessed mode, and therefore the cables can be fixed conveniently.

Specifically, when the cable is used, the three groups of cable cores 1 are separated by the support frame 2, the structural strength of the cable is enhanced, the cable is prevented from being damaged by dragging, dragging and twisting in the erection process, and the tensile resistance of the cable is improved under the combined action of the cable cores and the steel wire strips 4; the flame retardant property of the cable is improved by the arrangement of the filling layer 6 and the flame retardant layer 8; the buffer layer 9 and the cavity 12 in the buffer layer 9 play a role in buffering, and damage to the cable caused by strong impact force is reduced; the arrangement of the steel tape armor layer 10 increases the mechanical strength of the cable, improves the anti-corrosion capability and prolongs the service life of the cable; through the setting of inner sheath layer 7 and outer sheath layer 11, play dual fire-retardant, the effect that the separation cigarette volume distributes.

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 utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an anti low voltage power cable that draws of flat type, includes three cable cores (1) and support frame (2), its characterized in that: the three cable cores (1) are arranged in a linear mode, the supporting frame (2) is in a spiral shape, limiting grooves (3) matched with the cable cores (1) are formed in the left side and the right side of the lower end and the middle of the upper end of the supporting frame (2), steel wire strips (4) are arranged on the left side and the right side of the cable cores (1), the cable cores (1) sequentially comprise conductors (101), inner shielding layers (102), insulating layers (103) and outer shielding layers (104) from inside to outside, the three cable cores (1) are provided with wrapping layers (5) on the outer sides, filling layers (6) are filled in gaps between the wrapping layers (5) and the cable cores (1), inner sheath layers (7) are arranged on the outer sides of the wrapping layers (5), flame retardant layers (8) are arranged on the outer sides of the flame retardant layers (8), buffer layers (9) are arranged on the outer sides of the buffer layers (9), steel tape armoring layers (10) are arranged on the outer sides of the buffer layers (9), an outer sheath layer (11) is arranged on the outer side of the steel strip armor layer (10).

2. The flat tensile low-voltage power cable according to claim 1, wherein: the filling layer (6) is a magnesium oxide mineral filling layer.

3. The flat tensile low-voltage power cable according to claim 1, wherein: the flame-retardant layer (8) is a low-smoke halogen-free glass fiber tape layer.

4. The flat tensile low-voltage power cable according to claim 1, wherein: cavities (12) are uniformly arranged in the buffer layer (9).

5. The flat tensile low-voltage power cable according to claim 1, wherein: the two side walls on the upper side wall and the lower side wall of the outer sheath layer (11) are located between the two adjacent groups of cable cores (1) and are provided with grooves in an inwards concave mode.

6. The flat tensile low-voltage power cable according to claim 1, wherein: the inner sheath layer (7) and the outer sheath layer (11) are low-smoke halogen-free polyolefin sheath layers.