CN215770619U

CN215770619U - Cable for high-voltage transmission line

Info

Publication number: CN215770619U
Application number: CN202122255869.9U
Authority: CN
Inventors: 石现朴; 肖艳梅; 冯蔚敏; 韩玥; 王爽; 王超英; 王静; 李丽
Original assignee: Minquan Power Supply Co Of State Grid Henan Electric Power Co
Current assignee: Minquan Power Supply Co Of State Grid Henan Electric Power Co
Priority date: 2021-09-17
Filing date: 2021-09-17
Publication date: 2022-02-08
Anticipated expiration: 2031-09-17

Abstract

The utility model discloses a cable for a high-voltage transmission line, which comprises a cable and a heating device, wherein the cable comprises a plurality of conductor bundles, a cable insulating layer, conductive grease and a leakage detection line; the cable comprises a cable insulating layer, a plurality of conductor bundles, conductive grease and a leakage detection line, wherein the conductor bundles, the conductive grease and the leakage detection line are wrapped in the cable insulating layer, the conductor bundles respectively comprise a conductor and a conductor bundle insulating layer wrapping the conductor, the conductive grease is filled in the space in the cable insulating layer, the heating device is connected with the outer surface of the cable, and the heating device comprises a heat conduction part, a heating part and a plurality of water drainage holes. According to the cable for the high-voltage transmission line, the heating device is arranged on the upper part of the cable, snow melting is accelerated as required, and the cable can be effectively prevented from being broken by excessive snow; due to the design of the drain holes in the heating device, melted snow water can be effectively discharged; the heating device and the cable are manufactured in a split mode, and extra structural design of the cable is not needed.

Description

Cable for high-voltage transmission line

Technical Field

The utility model belongs to the technical field of cables, and particularly relates to a cable for a high-voltage transmission line.

Background

High-voltage transmission is a way of transmitting the voltage output by a generator after boosting the voltage through a transformer for power plants, and the transmission is carried out in this way because in the case of power transmission, the higher the voltage, the smaller the current, thus, the high-voltage transmission can reduce the current during power transmission, thereby reducing the heat loss caused by the current and reducing the material cost of long-distance power transmission, the high-voltage transmission line generally comprises an underground cable and an overhead cable, the underground cable is a cable which is usually buried underground compared with the common overhead cable, the cable is made of one or more mutually insulated conductors which are wrapped by an insulating layer and a protective layer, wires for transmitting power or information from one place to another, existing cables tend to accumulate snow on the upper surface, particularly, in cold and snow areas or in snow disasters, the accident that the cable is broken by excessive accumulated snow often occurs.

Disclosure of Invention

The cable for the high-voltage transmission line has the advantages that the heating device is started when snow is accumulated, snow melting is accelerated, and the danger that the snow is broken by pressure is avoided.

The utility model provides the following technical scheme: referring to fig. 1 and 2, a cable for a high voltage power transmission line includes:

a cable comprising a plurality of conductor bundles, a cable insulation layer, conductive grease and a leakage detection line; the cable comprises a cable insulation layer, a plurality of conductor bundles, conductive grease and a leakage detection line, wherein the plurality of conductor bundles, the conductive grease and the leakage detection line are wrapped in the cable insulation layer, the plurality of conductor bundles respectively comprise a conductor and a conductor bundle insulation layer wrapping the conductor, the conductive grease is filled in the space in the cable insulation layer, the plurality of conductor bundles and the leakage detection line are immersed in the conductive grease, and when the conductor bundle insulation layer fails and leaks electricity, the leakage detection line can obtain a leakage signal through the conductive grease and transmit the leakage signal to a monitoring center of an electric power department;

heating device, heating device is connected with the surface of cable conductor, heating device includes heat-conducting part, heating portion and a plurality of outlet, place in the heat-conducting part in the heating portion, the outlet arrange in the lower limb of heat-conducting part and with the part of the surface contact of cable conductor, through heating device's setting, when snow appears, electric power department monitoring center is the heating portion circular telegram, starts heating device to snow melts with higher speed, and will melt the snow water after passing through the outlet discharges.

Further, the heating part is a heating wire.

Further, the heat conducting portion is made of silica gel.

Further, heating device is rectangular shape, lays along the length direction of cable conductor, can make the snow water flow downwards along the circumference of cable conductor insulating layer, can effectual discharge the snow water that melts.

Further, the plurality of water drainage holes are distributed along the length direction of the cable.

Furthermore, the heating device and the cable are manufactured separately and are bonded and fixed together, so that the cable is convenient to produce, and the cable does not need to be additionally structurally designed.

Has the advantages that:

1. according to the cable for the high-voltage transmission line, the heating device is arranged on the upper part of the cable, snow melting is accelerated as required, and the cable can be effectively prevented from being broken by excessive snow; due to the design of the drain holes in the heating device, melted snow water can be effectively discharged; the heating device and the cable are manufactured in a split mode, and extra structural design of the cable is not needed.

2. This cable that high tension transmission line was used, through the setting of electrically conductive fat, when the wire harness insulating layer became invalid and leaked electricity, the electric leakage detection line can obtain the electric leakage signal through electrically conductive fat to give the surveillance center of electric power department with the electric leakage signal transmission, the staff of being convenient for in time maintains this cable, the use of the cable of being convenient for.

Drawings

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

FIG. 2 is a schematic cross-sectional view of the structure of the present invention.

In the figure: 1. a cable wire; 1.1, conducting wires; 1.2, a wire harness insulating layer; 1.3, conductive grease; 1.4, a leakage detection line; 1.5, cable insulation layer; 2. a heating device; 2.1, a heat conducting part; 2.2, heating part; 2.3, a water drainage hole.

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 and 2, a cable for a high voltage power transmission line includes:

the cable comprises a cable 1, wherein the cable 1 comprises a plurality of conductor bundles, a cable insulating layer 1.5, conductive grease 1.3 and a leakage detection line 1.4; the cable comprises a cable insulation layer 1.5, a plurality of conductor bundles, conductive grease 1.3 and a leakage detection line 1.4, wherein the plurality of conductor bundles, the conductive grease 1.3 and the leakage detection line 1.4 are wrapped in the cable insulation layer 1.5, the plurality of conductor bundles respectively comprise a conductor 1.1 and a conductor bundle insulation layer 1.2 wrapping the conductor 1.1, the conductive grease 1.3 is filled in the space in the cable insulation layer 1.5, the plurality of conductor bundles and the leakage detection line 1.4 are immersed in the conductive grease 1.3, when the conductor bundle insulation layer 1.2 fails and leaks electricity, the leakage detection line 1.4 can obtain a leakage signal through the conductive grease 1.3 and transmit the leakage signal to a monitoring center of an electric power department;

heating device 2, heating device 2 is connected with the surface of cable conductor 1, heating device 2 includes heat conduction portion 2.1, heating portion 2.2 and a plurality of outlet 2.3, place in heat conduction portion 2.1 in heating portion 2.2, outlet 2.3 arranges the lower limb of heat conduction portion 2.1 and the part of the surface contact with cable conductor 1, through heating device 2's setting, when snow appears, the power department monitoring center is heating portion 2.2 circular telegram, start heating device 2, with the snow thawing that accelerates, and the snow water after will melting passes through outlet 2.3 and discharges.

The heating part 2.2 is a heating wire.

The heat conducting part 2.1 is made of silicone.

Heating device 2 is rectangular shape, lays along cable conductor 1's length direction, can make the snow water flow downwards along cable conductor insulating layer 1.5's circumference, can effectual discharge the snow water that melts.

The plurality of drainage holes 2.3 are distributed along the length direction of the cable 1.

The heating device 2 and the cable 1 are manufactured separately and are bonded together, so that the cable is convenient to produce, and the cable does not need to be additionally structurally designed.

The working principle is as follows: during the use, when piling up snow on the cable, electric power department monitoring center is heating portion 2.2 circular telegrams, start heating device 2, in order to accelerate snow to melt, and the snow water after will melting is discharged through outlet 2.3, through the setting of electrically conductive fat, when the inefficacy electric leakage of wire harness insulating layer 1.2, electric leakage detection line 1.4 can obtain the leakage signal through electrically conductive fat 1.3, and convey the leakage signal to electric power department's monitoring center, the staff of being convenient for in time maintains this cable, the use of the cable of being convenient for.

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. A cable for a high voltage power transmission line, comprising: the cable comprises a cable (1), wherein the cable (1) comprises a plurality of conductor bundles, a cable insulating layer (1.5), conductive grease (1.3) and a leakage detection line (1.4); the cable comprises a cable insulating layer (1.5), and is characterized in that a plurality of conductor bundles, conductive grease (1.3) and leakage detection lines (1.4) are wrapped in the cable insulating layer (1.5), the conductor bundles respectively comprise conductors (1.1) and conductor bundle insulating layers (1.2) wrapping the conductors (1.1), the conductive grease (1.3) is filled in the space in the cable insulating layer (1.5), and the conductor bundles and the leakage detection lines (1.4) are immersed in the conductive grease (1.3);

the heating device (2) is connected with the outer surface of the cable (1), the heating device (2) is located on the upper portion of the cable (1), the heating device (2) comprises a heat conduction portion (2.1), a heating portion (2.2) and a plurality of water drainage holes (2.3), the heating portion (2.2) is arranged in the heat conduction portion (2.1), and the water drainage holes (2.3) are arranged on the lower edge of the heat conduction portion (2.1) and are in contact with the outer surface of the cable (1).

2. A cable for a high voltage power transmission line according to claim 1, characterized in that: the heating part (2.2) is an electric heating wire.

3. A cable for a high voltage power transmission line according to claim 1, characterized in that: the heat conducting part (2.1) is made of silica gel.

4. A cable for a high voltage power transmission line according to claim 1, characterized in that: the heating device (2) is in a strip shape and is laid along the length direction of the cable (1).

5. A cable for a high voltage power transmission line according to claim 1, characterized in that: the plurality of water drainage holes (2.3) are distributed along the length direction of the cable (1).