LU501318B1

LU501318B1 - Automatic deicing device for overhead ground wire

Info

Publication number: LU501318B1
Application number: LU501318A
Authority: LU
Inventors: Tianxiang Chen; Yu Zhang
Original assignee: Univ Chengdu Technology
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-08-09

Abstract

The present disclosure discloses an automatic deicing device for an overhead ground wire, comprising a memory alloy wire sleeve, wherein the memory alloy wire sleeve is arranged on the outer skin of the overhead ground wire and comprises a memory alloy wire outer tube, a memory alloy wire inner tube and an electric heating wire; and the electric heating wire is arranged between the memory alloy wire outer tube and the memory alloy wire inner tube. The automatic deicing device for the overhead ground wire provided in the present disclosure has the following advantages: the electric heating wire is electrified and heated, thus the temperature of the memory alloy wire inner tube and the memory alloy wire outer tube is changed, the memory alloy wire inner tube and the memory alloy wire outer tube deform, the whole memory alloy wire sleeve is integrally stressed by upward phase change force, and ice covered on the outer skin of the overhead ground wire is broken in a jacked manner; and the purpose of automatically removing the ice covered on the overhead ground wire is achieved.

Description

AUTOMATIC DEICING DEVICE FOR OVERHEAD GROUND WIRE TECHNICAL FIELD

[01] The present disclosure relates to the technical field of overhead ground wire deicing, and particularly relates to an automatic deicing device for an overhead ground wire.

BACKGROUND ART

[02] Overhead ground wire is erected above the power transmission line and is a line for protecting the power transmission wire from being directly hit by thunder and lightning. In a high-voltage power transmission line, in a region with frequent lightning strokes, besides the lightning rod is installed for protection, the overhead ground wire is also adopted for protection. Therefore, the overhead ground wire is an important component of the power transmission line. The overhead ground wire is located above the wire, it is connected with the grounding body through a tower and must be connected with the tower grounding device in a fastened mode. When the thunder and lightning hit the overhead ground wire, thunder and lightning current flows into the ground through the grounding body, normal operation of the power transmission line wire is protected, the shunting effect can be achieved when the thunder and lightning hit the tower, so that the potential of the tower top is reduced, and the phenomenon of back striking is avoided. When the thunder and lightning hit part of the ground around the high-voltage power transmission line, the ground wire has a certain shielding effect, and induced overvoltage on the wire can be reduced.

[03] The overall icing thickness of the power transmission line can be continuously increased along with the severe weather, and accidents such as breakage of wire and the ground wire, inclination or collapse of tower due to non-uniform stress and damage to hardware fittings can be caused in severe cases. In cold winter and early spring, the power transmission line is iced in many regions in China, and major power failure accidents such as pole collapse in Hunan Province, Guizhou Province, etc. were caused in the spring festival in 2008. The overhead ground wire is mainly used for preventing lightning stroke and ensuring safe operation of the line, current flowing through the overhead ground wire is often very small, and icing is easier. If the temperature in the air rises, the wire ice is easier to fall off than the ground wire ice under the action of gravity, thus the wire rises, and the safe distance between the wire and the ground wire is reduced. After the ice on the overhead ground wire reaches a certain degree, the sag of the overhead ground wire is increased, the safe distance between the wire and the ground wire can be reduced due to sinking of the ground wire, the requirement of the power transmission line on the sag cannot be met, and the phenomenon that the wire discharges to the ground wire is possibly caused. Therefore, the problem of how to prevent the safe distance between the overhead ground wire and the wire from being reduced due to sag sinking caused by icing and prevent the ground wire from being broken due to icing is a major problem needing to be solved for ensuring safe operation 1 of a power grid at the present stage. LU501318

SUMMARY

[04] The present disclosure aims to overcome the defects in the prior art, provides an automatic deicing device for an overhead ground wire, and solves the problem of icing on the overhead ground wire at present.

[05] The object of the present disclosure is achieved by the following technical solutions: an automatic deicing device for an overhead ground wire comprises a memory alloy wire sleeve, wherein the memory alloy wire sleeve is arranged on the outer skin of the overhead ground wire and comprises a memory alloy wire outer tube, a memory alloy wire inner tube and an electric heating wire; and the electric heating wire is arranged between the memory alloy wire outer tube and the memory alloy wire inner tube.

[06] Further, the automatic deicing device for the overhead ground wire also comprises a temperature sensor, a control switch and a power supply, wherein the control switch is electrically connected with the temperature sensor and the power supply; the power supply is electrically connected with the electric heating wire; and the electric heating wire is heated so that the shapes of the memory alloy wire outer tube and the memory alloy wire inner tube are changed.

[07] Further, the memory alloy wire outer tube is made of a shape memory alloy material, and the memory alloy wire inner tube is made of a shape memory alloy material.

[08] The automatic deicing device for the overhead ground wire has the advantages that the electric heating wire is electrified and heated, thus the temperature of the memory alloy wire inner tube and the memory alloy wire outer tube is changed, the memory alloy wire inner tube and the memory alloy wire outer tube deform, the whole memory alloy wire sleeve is integrally stressed by upward phase change force, and ice covered on the outer skin of the overhead ground wire is broken in a jacked manner; and the purpose of automatically removing the ice covered on the overhead ground wire is achieved.

BRIEF DESCRIPTION OF THE DRAWINGS

[09] FIG. 1 is a structural schematic diagram of the present disclosure;

[10] FIG. 2 is a state diagram after icing; and

[11] FIG. 3 is an upward phase change diagram after heating.

[12] Reference numerals: 1-outer skin; 2-memeory alloy wire outer tube; 3-electric heating wire; and 4-memory alloy wire inner tube.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[13] In order to make the object, the technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely in conjunction with the accompanying drawings herein. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, and are not 2 all of embodiments thereof. The components of the embodiments generally described LU501318 and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present disclosure provided in the drawings is not intended to limit the scope of protection of the present disclosure to be protected, but merely represents selected embodiments of the present disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure. The present disclosure will be further described below in conjunction with the accompanying drawings.

[14] The present disclosure will be further described below in conjunction with the accompanying drawings, but the protection scope of the present disclosure is not limited thereto.

[15] As shown in FIG.1, an automatic deicing device for an overhead ground wire comprises a memory alloy wire sleeve, wherein the memory alloy wire sleeve is arranged on the outer skin 1 of the overhead ground wire and comprises a memory alloy wire outer tube 2, a memory alloy wire inner tube 3 and an electric heating wire 3; and the electric heating wire 3 is arranged between the memory alloy wire outer tube 2 and the memory alloy wire inner tube 3.

[16] The automatic deicing device for the overhead ground wire also comprises a temperature sensor, a control switch and a power supply, wherein the control switch is electrically connected with the temperature sensor and the power supply; the power supply is electrically connected with the electric heating wire 3; and the electric heating wire is heated so that the shapes of the memory alloy wire outer tube 2 and the memory alloy wire inner tube 3 are changed.

[17] The memory alloy wire outer tube 2 is made of a shape memory alloy material, and the memory alloy wire inner tube 3 is made of a shape memory alloy material.

[18] As shown in FIG. 2, firstly, a memory alloy sleeve was set to generate a deformation radian (a force radian of ice weight borne by the ground wire after icing) at a low temperature (when icing was started at 0 °C); and the memory alloy sleeve was heated to about n’C, and automatically recovered to an original state (nC >0°C). As shown in FIG. 3, after heating, the memory alloy wire sleeve deformed due to the gravity of icing, when the temperature was detected to be about gC through a temperature sensor, a temperature control switch was started to heat a resistance wire; and when the temperature reached about nC, the memory alloy wire sleeve automatically recovered to the original state. In the process of recovering to the original state, the whole body was subjected to an upward phase change force, and light and thin icing was broken by jacking. (g'C<0C<n CC).

[19] According to the present disclosure, the electric heating wire is electrified and heated, thus the temperature of the memory alloy wire inner tube and the memory alloy wire outer tube is changed, the memory alloy wire inner tube and the memory alloy wire outer tube deform, the whole memory alloy wire sleeve is integrally stressed by upward phase change force, and ice covered on the outer skin of the overhead ground wire is broken in a jacked manner; and the purpose of automatically removing the ice covered on the overhead ground wire is achieved.

3

[20] The above descriptions are only the preferred embodiments of the present LU501318 disclosure. It should be understood that the present disclosure is not limited to the form disclosed herein, and should not be regarded as an exclusion of other embodiments, but can be used in various other combinations, modifications and environments, and can be modified through the above teaching or technology or knowledge in related fields within the scope of the concept described herein. The modifications and changes made by those skilled in the art without departing from the spirit and scope of the present disclosure shall fall within the protection scope of the appended claims of the present disclosure.

4

Claims

WHAT IS CLAIMED IS: LUS01318

1. An automatic deicing device for an overhead ground wire, comprising a memory alloy wire sleeve, wherein the memory alloy wire sleeve is arranged on the outer skin (1) of the overhead ground wire and comprises a memory alloy wire outer tube (2), a memory alloy wire inner tube (3) and an electric heating wire (3); and the electric heating wire (3) is arranged between the memory alloy wire outer tube (2) and the memory alloy wire inner tube (3).

2. The automatic deicing device for an overhead ground wire according to claim 1, wherein the automatic deicing device also comprises a temperature sensor, a control switch and a power supply, wherein the control switch is electrically connected with the temperature sensor and the power supply, the power supply is electrically connected with the electric heating wire (3), and the electric heating wire is heated so that the shapes of the memory alloy wire outer tube (2) and the memory alloy wire inner tube (3) are changed.

3. The automatic deicing device for an overhead ground wire according to any one of claims 1 to 2, wherein the memory alloy wire outer tube (2) is made of a shape memory alloy material, and the memory alloy wire inner tube (3) is made of a shape memory alloy material.

1