CN112134237A - Overhead ground wire icing sag eliminating device - Google Patents
Overhead ground wire icing sag eliminating device Download PDFInfo
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- CN112134237A CN112134237A CN202010839197.3A CN202010839197A CN112134237A CN 112134237 A CN112134237 A CN 112134237A CN 202010839197 A CN202010839197 A CN 202010839197A CN 112134237 A CN112134237 A CN 112134237A
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- temperature
- wire
- memory alloy
- overhead ground
- ground wire
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/16—Devices for removing snow or ice from lines or cables
Abstract
The invention relates to an overhead ground wire icing sag eliminating device which comprises a temperature deformation memory alloy spring, wherein the temperature deformation memory alloy spring is hung between an overhead ground wire and a tower, the overhead ground wire is connected with the tower, the icing sag is formed, the sag of the overhead ground wire is pulled upwards by changing the temperature of the temperature deformation memory alloy spring, and the safety distance between the overhead ground wire and a lead is increased; the low-temperature memory rings are sleeved on the sag sections of the overhead ground wires, and ice coating on the overhead ground wires is automatically eliminated by changing the temperature of the low-temperature memory rings. According to the invention, the temperature of the inner pipe and the outer pipe of the memory alloy wire and the temperature of the memory alloy spring are changed by electrifying and heating the electric heating wire, so that the inner pipe and the outer pipe of the memory alloy wire are deformed, an outward phase-change force is generated by the sleeve of the memory alloy wire, and the ice is coated on the outer skin of the overhead ground wire to be broken; and the overhead ground wire is pulled upwards, so that the safety distance between the overhead ground wire and the conducting wire is increased, the overhead ground wire is prevented from sagging and sinking due to ice coating on the overhead ground wire, and the potential safety hazard problem that the safety distance between the overhead ground wire and the live conducting wire is not enough is solved.
Description
Technical Field
The invention relates to the technical field of overhead ground wire deicing, in particular to an overhead ground wire icing sag eliminating device.
Background
The overhead ground wire is erected above the power transmission line and is a line for protecting the power transmission conductor from being directly hit by thunder. In a high-voltage transmission line, in areas with frequent lightning strikes, overhead ground wire protection is adopted in addition to lightning rod protection. Therefore, overhead ground wires are an important component of power transmission lines. The overhead ground wire is positioned above the conducting wire, is connected with the grounding body through a tower and must be fixedly connected with a tower grounding device. When thunder hits an overhead ground wire, lightning current flows into the ground through the grounding body, normal operation of a transmission line wire is protected, a shunting effect can be achieved when the lightning hits a tower, the potential of the tower top is reduced, and counterattack is avoided. When the lightning strikes the ground around the high-voltage transmission line, the ground wire has a certain shielding effect, and the induced overvoltage on the wire can be reduced.
The overall icing thickness of the power transmission line can be increased along with the bad weather, and accidents such as breakage of a lead and a ground wire, uneven inclination or collapse of a tower under stress, damage of hardware fittings and the like can be caused in severe cases. In cold winter and early spring, the icing phenomenon of power transmission lines occurs in many areas of China, and large power failure accidents such as pole collapse in Hunan, Guizhou and the like are caused in spring festival of 2008. Because the overhead ground wire mainly prevents lightning stroke and ensures the safe operation of the line, the current flowing through the overhead ground wire is often very small and is easier to be coated with ice. If the air temperature in the air rises, the ice coating of the lead is more easily fallen off than the ice coating of the ground wire under the action of gravity, so that the lead rises, and the safety distance between the lead and the ground wire is reduced. When the ice coating on the overhead ground wire reaches a certain degree, the sag of the overhead ground wire is increased, the safety distance between the conducting wire and the ground wire can be reduced when the ground wire sinks, the requirement of the power transmission line on the sag of the power transmission line cannot be met, and the phenomenon that the conducting wire discharges to the ground wire is possibly caused. Therefore, how to prevent the safety distance between the overhead ground wire and the lead from being reduced due to sag caused by ice coating and prevent the ice coating from causing the breakage of the ground wire is a major problem to be solved for ensuring the safe operation of the power grid at the present stage.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides an overhead ground wire ice-coating sag eliminating device and solves the problem of ice coating on the existing overhead ground wire.
The purpose of the invention is realized by the following technical scheme: an icing sag eliminating device for an overhead ground wire comprises a temperature deformation memory alloy spring which is hung and connected between the overhead ground wire forming an icing sag and a tower, wherein the temperature of the temperature deformation memory alloy spring is changed to further pull up the sag of the overhead ground wire, so that the safety distance between the temperature deformation memory alloy spring and a lead is increased; and the low-temperature memory rings are sleeved on the sag sections of the overhead ground wires, and the temperature of the low-temperature memory rings is changed to enable the memory rings to generate deformation and deformation force so as to automatically eliminate ice coating on the overhead ground wires.
Further, the device also comprises a temperature sensor, a control switch and a power supply; the control switch is electrically connected with the temperature sensor and the power supply, the power supply is electrically connected with the temperature deformation memory alloy spring and the low-temperature memory ring, and the temperature of the temperature deformation memory alloy spring and the low-temperature memory ring is changed by electrifying the temperature deformation memory alloy spring and the low-temperature memory ring through the power supply.
Further, the low-temperature memory ring comprises a memory alloy wire outer pipe, a memory alloy wire inner pipe and an electric heating wire; the electric heating wire is arranged between the memory alloy wire outer pipe and the memory alloy wire inner pipe; the electric heating wire is electrically connected with the power supply, and the temperature of the memory alloy wire outer pipe and the temperature of the memory alloy wire inner pipe are raised by electrifying the electric heating wire for heating, so that the electric heating wire generates deformation to generate phase change force to tear off the ice coating on the overhead ground wire.
Further, the memory energy storage spring that temperature deformation memory alloy spring was made by shape memory alloy material has twined electric heating wire on it, the power with electric heating wire electric connection, through the circular telegram heating to electric heating wire, and then risees memory energy storage spring's temperature makes it take place deformation and produces the looks transformation power and upwards draws the lift with overhead earth's sag, increase and the safe distance between the wire.
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 and can change in shape according to the change of temperature.
The invention has the following advantages: an overhead ground wire icing sag eliminator is characterized in that an electric heating wire is electrified and heated to change the temperature of an inner pipe and an outer pipe of a memory alloy wire, so that the inner pipe and the outer pipe of the memory alloy wire are deformed, an outward phase-change force is generated by a sleeve of the memory alloy wire, and the icing on the outer skin of the overhead ground wire is topped off; the aim of automatically eliminating ice coating on the overhead ground line is fulfilled; the electric heating wire is electrified to heat, the temperature of the memory energy storage spring is changed, the overhead ground wire is further pulled upwards, the safety distance between the overhead ground wire and the lead is increased, the problem that the overhead ground wire sags due to ice coating on the overhead ground wire is solved, the potential safety hazard problem that the distance between the overhead ground wire and the lead is insufficient is solved, the whole manufacturing is simple, the climate weather is effectively utilized, the expected effect is achieved with half the effort, and the operation and maintenance cost is saved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: 1-temperature deformation memory alloy spring, 2-overhead ground wire and 3-low temperature memory ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application. The invention is further described below with reference to the accompanying drawings.
The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following.
As shown in fig. 1, the device for eliminating the icing sag of the overhead ground wire comprises a temperature deformation memory alloy spring 1 which is hung and connected between an overhead ground wire 2 forming the icing sag and a tower, wherein the temperature of the temperature deformation memory alloy spring 1 is changed to further pull up the sag of the overhead ground wire 2, so that the safety distance between the temperature deformation memory alloy spring 1 and a lead is increased; and the ice coating on the overhead ground wire 2 is automatically eliminated by changing the temperature of the low-temperature memory circular rings 3.
The device also comprises a temperature sensor, a control switch and a power supply; the control switch is electrically connected with the temperature sensor and the power supply, the power supply is electrically connected with the temperature deformation memory alloy spring and the low-temperature memory ring, and the temperature of the temperature deformation memory alloy spring 1 and the low-temperature memory ring 3 is changed by electrifying the power supply.
The low-temperature memory ring comprises a memory alloy wire outer pipe, a memory alloy wire inner pipe and an electric heating wire; the electric heating wire is arranged between the memory alloy wire outer pipe and the memory alloy wire inner pipe; the electric heating wire is electrically connected with the power supply, and the temperature of the memory alloy wire outer pipe and the temperature of the memory alloy wire inner pipe are raised by electrifying the electric heating wire for heating, so that the electric heating wire is deformed to generate phase change force to break the ice coating on the overhead ground wire 2.
The temperature deformation memory alloy spring 1 is a memory energy storage spring made of a shape memory alloy material, an electric heating wire is wound on the memory energy storage spring, the power supply is electrically connected with the electric heating wire, the electric heating wire is electrified and heated, the temperature of the memory energy storage spring is raised, the memory energy storage spring is enabled to generate deformation, phase change force is generated, the sag of the overhead ground wire 2 is pulled upwards, and the safety distance between the memory energy storage spring and a lead is increased.
Furthermore, according to the meteorological conditions of the overhead line in a certain area, the spring (the resistance wire wound on the spring) starts to deform and shrink at the low temperature of about 0 ℃, and shrinks to the shortest at the temperature of about m ℃ below zero. (length after shrinkage b m), heating to about D deg.C, slowly elongating, and recovering original shape at F deg.C. (original length a m), wherein m ℃ is less than 0 ℃ and D ℃ is less than F ℃.
The memory alloy wire outer pipe 2 is made of shape memory alloy materials, the memory alloy wire inner pipe 3 is made of shape memory alloy materials, and the shape of the memory alloy wire outer pipe 2 can be changed according to the change of temperature.
Further, the shape memory alloy is a new functional metal material, and has the characteristics of shape memory effect and super elasticity. The temperature-based heat exchanger is deformed based on temperature change, namely, the shape and the size are greatly changed in a narrow temperature range, and the shape change can be designed according to the actual situation. It can be seen from fig. 1 that after the temperature deformation memory alloy spring is hung and connected between the tower and the overhead ground wire 2, the sag degree of the temperature deformation memory alloy spring is obviously pulled upwards, and the safety distance between the temperature deformation memory alloy spring and a lead is increased.
According to the invention, the temperature of the inner pipe and the outer pipe of the memory alloy wire is changed by electrifying and heating the electric heating wires in the low-temperature memory circular ring 3, so that the inner pipe and the outer pipe of the memory alloy wire are deformed, the phase-change force and the deformation of the sleeve of the memory alloy wire are generated, the light and thin ice coating on the overhead ground wire is broken, and the purpose of automatically eliminating the ice coating on the overhead ground wire is achieved; through to the electric heating wire ohmic heating of winding on memory energy storage spring, and then change memory energy storage spring's temperature to let memory energy storage spring take place deformation and shrink, produce the phase change force of the directional shaft tower direction of a direction, and then realize the pulling-up of overhead earth wire 2, make the arc rise, thereby increased with the wire between the safe distance.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. The utility model provides an overhead ground wire icing sag remove device which characterized in that: the temperature deformation memory alloy spring (1) is hung and connected between an overhead ground wire (2) forming an icing sag and a tower, the sag of the overhead ground wire (2) is pulled upwards by changing the temperature of the temperature deformation memory alloy spring (1), and the safety distance between the temperature deformation memory alloy spring and a lead is increased; and the ice coating on the overhead ground wire (2) is automatically eliminated by changing the temperature of the low-temperature memory circular rings (3).
2. An overhead ground wire icing sag removal device according to claim 1, wherein: the device also comprises a temperature sensor, a control switch and a power supply; the control switch is electrically connected with the temperature sensor and the power supply, the power supply is electrically connected with the temperature deformation memory alloy spring and the low-temperature memory ring, and the temperature deformation memory alloy spring (1) and the low-temperature memory ring (3) are electrified through the power supply to change the temperature of the low-temperature memory ring.
3. An overhead ground wire icing sag removal device according to claim 2, wherein: the low-temperature memory ring comprises a memory alloy wire outer pipe, a memory alloy wire inner pipe and an electric heating wire; the electric heating wire is arranged between the memory alloy wire outer pipe and the memory alloy wire inner pipe; the electric heating wire is electrically connected with the power supply, and the temperature of the memory alloy wire outer pipe and the temperature of the memory alloy wire inner pipe are raised by electrifying the electric heating wire for heating, so that the memory alloy wire outer pipe and the memory alloy wire inner pipe are deformed to generate phase change force to break the ice coating on the overhead ground wire (2).
4. An overhead ground wire icing sag removal device according to claim 1, wherein: the temperature deformation memory alloy spring (1) is a memory energy storage spring made of a shape memory alloy material, an electric heating wire is wound on the memory energy storage spring, the power supply is electrically connected with the electric heating wire, the electric heating wire is electrified and heated, the temperature of the memory energy storage spring is raised, the memory energy storage spring is deformed to generate phase-change force, the sag of the overhead ground wire (2) is upwards pulled, and the safety distance between the memory energy storage spring and a wire is increased.
5. An overhead ground wire icing sag removal device according to claim 3, wherein: the memory alloy wire outer pipe (2) is made of shape memory alloy materials, the memory alloy wire inner pipe (3) is made of shape memory alloy materials, and the shape of the memory alloy wire outer pipe (2) can be changed according to the change of temperature.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010839197.3A CN112134237B (en) | 2020-08-19 | 2020-08-19 | Overhead ground wire icing sag eliminating device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010839197.3A CN112134237B (en) | 2020-08-19 | 2020-08-19 | Overhead ground wire icing sag eliminating device |
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| CN112134237A true CN112134237A (en) | 2020-12-25 |
| CN112134237B CN112134237B (en) | 2021-11-02 |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6450710A (en) * | 1987-08-20 | 1989-02-27 | Hakko Electric | Preventive device of snow deposit for transmission line |
| JPH01126124A (en) * | 1987-11-10 | 1989-05-18 | Sumitomo Electric Ind Ltd | Icing and snowing prevention apparatus for overhead power transmission line |
| CN101113724A (en) * | 2007-09-03 | 2008-01-30 | 北京航空航天大学 | Wide temperature range tandem type shape memory alloy driving mechanism |
| RU2428780C1 (en) * | 2010-05-12 | 2011-09-10 | Борис Иосифович Механошин | Intermediate link compensating changes of length of hot wire in overhead line span (versions), and overhead line span equipped with such intermediate link (versions) |
| JP2013219850A (en) * | 2012-04-04 | 2013-10-24 | Chugoku Electric Power Co Inc:The | Vernier fitting, and sag adjustment method for overhead line using the same |
| CN209344722U (en) * | 2018-12-26 | 2019-09-03 | 金华八达集团有限公司科技信息分公司 | A kind of cross cable sagging prevention device |
| CN110299682A (en) * | 2019-07-18 | 2019-10-01 | 国网青海省电力公司海东供电公司 | A kind of light instrument adjusting conducting wire sag |
| CN110707599A (en) * | 2019-11-14 | 2020-01-17 | 云南电网有限责任公司昆明供电局 | Special tool for electrified adjustment of 220kv vertically-arranged double-bundle conductor sag |
| CN110718879A (en) * | 2019-10-30 | 2020-01-21 | 四川省丰业电力工程有限公司 | High-voltage overhead line and automatic droop correcting equipment thereof |
-
2020
- 2020-08-19 CN CN202010839197.3A patent/CN112134237B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6450710A (en) * | 1987-08-20 | 1989-02-27 | Hakko Electric | Preventive device of snow deposit for transmission line |
| JPH01126124A (en) * | 1987-11-10 | 1989-05-18 | Sumitomo Electric Ind Ltd | Icing and snowing prevention apparatus for overhead power transmission line |
| CN101113724A (en) * | 2007-09-03 | 2008-01-30 | 北京航空航天大学 | Wide temperature range tandem type shape memory alloy driving mechanism |
| RU2428780C1 (en) * | 2010-05-12 | 2011-09-10 | Борис Иосифович Механошин | Intermediate link compensating changes of length of hot wire in overhead line span (versions), and overhead line span equipped with such intermediate link (versions) |
| JP2013219850A (en) * | 2012-04-04 | 2013-10-24 | Chugoku Electric Power Co Inc:The | Vernier fitting, and sag adjustment method for overhead line using the same |
| CN209344722U (en) * | 2018-12-26 | 2019-09-03 | 金华八达集团有限公司科技信息分公司 | A kind of cross cable sagging prevention device |
| CN110299682A (en) * | 2019-07-18 | 2019-10-01 | 国网青海省电力公司海东供电公司 | A kind of light instrument adjusting conducting wire sag |
| CN110718879A (en) * | 2019-10-30 | 2020-01-21 | 四川省丰业电力工程有限公司 | High-voltage overhead line and automatic droop correcting equipment thereof |
| CN110707599A (en) * | 2019-11-14 | 2020-01-17 | 云南电网有限责任公司昆明供电局 | Special tool for electrified adjustment of 220kv vertically-arranged double-bundle conductor sag |
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| CN112134237B (en) | 2021-11-02 |
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