JPS63316607A - Preventing device for electric wire from icing and snowing - Google Patents

Abstract

PURPOSE:To scrape away snow by a device giving driving action to a spiral rod by constituting the device through loosely winding the spiral rod in the periphery of an electric wire so that this spiral rod is able to perform rotary or linear motion and connecting a power driving part to this spiral rod. CONSTITUTION:A spiral rod 2 is fitted to an electric wire 1, but a device, wound with the spiral rod not to be closely attached to the electric wire, provides a small gap delta existing between the electric wire 1 and the spiral rod 2. For this reason, the spiral rod 2 is able to perform rotary or linear motion on the periphery of the electric wire. A driving gear 6, which gives a turning effect or linear motion to the spiral rod 2 mounted to be fitted as described in the above, is connected to this spiral rod 2, and a motor 4 is connected to the driving gear 6 through a clutch 5. Snow and ice can be scraped away from the electric wire 1 by driving the spiral rod 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an ice and snow prevention device for actively removing ice and snow adhering to, for example, overhead power transmission lines.

[Conventional technology and problems] When ice and snow forms on electric wires, depending on the degree and form, it can cause the wires to break, cause so-called gear lopping, and cause short circuits between phases, and in the worst case, support towers may be damaged. This can cause various problems such as collapse, and there are constant reports of such accidents in snowy areas every winter.

Therefore, attempts to prevent the accumulation of ice and snow on electric wires, which causes such troubles, have been proposed for a long time. In the case of coated wires, considerable effects have been confirmed by forming fin-like protrusions on the outer periphery of the coated insulator. However, in the case of bare wires, especially overhead power transmission lines, it is difficult to form such protrusions, and there is still a lack of proposals that are sufficiently effective.

In what is shown in FIG. 3, rings 10.10 are attached to the outer periphery of the power transmission line 1 at predetermined intervals to prevent snow from accumulating. Under certain weather conditions, the snow 20 that has fallen on the electric wire 1 is
It slides down the outer periphery of the electric wire 1 while moving in the direction of the arrow in FIG. 3 along the twisted groove of the electric wire 1. Therefore, if the ring 10 that acts as a stopper is installed at the end of the snow that is about to move along such a twisted groove, the snow 20 will be prevented from moving, and the snow 2o will be balanced by its own weight. This is based on the knowledge that the object is lost and falls at an angle of 20° in Figure 3.

However, the snow falling phenomenon caused by the ring 10 as described above is based on the assumption that no twisting occurs in the electric wire itself, and if a twisting moment is generated in the electric wire 1 due to the weight of snow,
Not only does the weight of the snow get used up in twisting the wires, so they don't fall as desired, but the effectiveness of Ring 10 is greatly diminished, making it useless for preventing snow damage.

For this reason, in this ring attachment method, an attempt has been made to attach a heavy damper to the center of the wire to prevent the wire from twisting.

However, there are a wide variety of weather conditions in which icing and snow occur, and in weather conditions where the wind blows from the side of the electric wire 1 as shown by the arrow in Figure 4, the snow becomes ice and snow and
It grows in a wing shape as shown in Fig. 4, 20°, in the lateral direction and upwind. In this case, unlike the above-mentioned case, it is better if the electric wire 1 is twisted so that the snow does not grow uniformly.
If twisting is prevented, the wings 20''' will grow further, and a lifting force will be generated on the electric wire 1 by the wings 20'', which will lead to large gear roping.

As mentioned above, preventing ice and snow from accumulating on power transmission lines is by no means an easy task, and the reality is that those involved are struggling with this problem. In response to the above, there is also a proposal to wrap a heater around the electric wire and use it to melt the snow. However, melting snow over long distances requires a large amount of electricity, so the feasibility of this proposal is currently very low.

Purpose of the Invention] In view of the above-mentioned current situation, the present invention seeks to provide a device for preventing icing and snow from accumulating on electric wires, which can prevent icing and snow from accumulating on electric wires regardless of the weather conditions at that time. be.

[Summary of the Invention] In other words, the gist of the present invention is to loosely wind a spiral rod around the outer periphery of an electric wire, configure the spiral rod to be capable of rotation or linear movement, and connect a power drive unit to the spiral rod. When there is a risk of ice and snow forming, the spiral rod is driven to actively scrape off the snow.

[Example] The present invention will be explained below based on Examples.

FIG. 1 is an explanatory diagram showing a state in which an electric wire 1 is equipped with an ice-and-snow prevention device according to the present invention.

A spiral rod 2 is fitted to the electric wire 1 as shown in the figure, but the spiral rod 2 is not tightly wound around the electric wire 1, and FIG. As can be seen, a small gap δ exists between the electric wire 1 and the spiral rod 2. Because of this gap δ, the spiral rod 2 can rotate or move linearly around the outer circumference of the wire.

The spiral rod 2 connected as described above is connected to a drive device 6 that provides rotational force, linear motion, or a mixture of both, and a motor 4 is connected via a clutch 5. There is. In order to scrape off the snow adhering to the electric wire 1, the movement of the spiral rod 2 does not necessarily need to be high speed, and therefore the capacity of the motor 4 does not necessarily need to be large. The motor 4 may be driven by storing electricity using a normal battery or a solar battery. However, if the current from the current transformer 3 is used as the drive source, the energizing current of the power source 1 will be utilized, making it easier to obtain the drive source.

On the other hand, since the spiral rod 2 only needs to move when there is a risk of icing or snow, it is preferable to provide a switch mechanism therein. Such a switch mechanism may be either wired or wireless. Depending on the situation, it may be possible to automatically turn on and off in combination with a snowfall sensor.

The length of the spiral rod 2 may be long from the beginning, but if it is configured to connect short lengths,
Since the worker can attach the electric wires 1 in order on the steel tower and push them out without having to attach them by riding on the electric wires, the installation work is much easier than with the above-mentioned ring or the like.

In addition, if the stopper 7 is housed at one free end of the spiral rod 2, it is possible to prevent the spiral rod from falling due to displacement. Furthermore, this stopper 7 also has the effect of promoting the falling of snow.

The ice and snow prevention device according to the present invention is configured as described above and uses a power drive device, so unlike the device that depends on the weight of the ice and snow, the spiral rod for scraping off freezes and stops moving. There is no need to worry, and the product can provide the desired effect of preventing ice and snow regardless of the nature of the snow or ice or weather conditions.

[Effects of the Invention] As detailed above, according to the ice and snow prevention device according to the present invention, sufficient lightning strikes can be carried out even though power is used, without requiring a large capacity, and depending on the snow quality etc. This solves the conventional problem of whether lightning is possible or impossible, and it is of great significance that it is possible to take drastic measures against ice and snow accretion on electric wires with high reliability.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the ice and snow accumulation prevention device according to the present invention, FIG. 2 is an AA' cross-sectional view of FIG. 1, and FIG. 3 is an explanatory diagram showing an example of snow accumulation prevention using a ring. FIG. 4 is an explanatory diagram showing another aspect of icing and snow formation. 1: Electric wire, 2: Spiral rod, 4: Motor, 5: Clutch, 6: Drive device, 7: Stopper. ;t″l Country l: Electric stock 2: SHE 0 ITEL 0.7 DE 4- MOTOR 5: KRA・/+ 6:%Q 1ltt student IT3 口″r4127

Claims (3)

[Claims] (1) Prevention of icing and snow on electric wires, which include a spiral rod that can be attached to an electric wire and has an inner diameter larger than the outer diameter of the electric wire, and a power drive unit that can give rotation or linear motion to the spiral rod. Device. (2) The icing and snow prevention device according to claim 1, comprising a current transformer as a power drive source and a motor driven by the current of the current transformer. (3) The ice and snow accretion prevention device according to claim 1 or 2, which has a stopper on the free end side of the spiral rod.