JPH0321712B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a device for melting snow around a branch line supporting a utility pole in order to remove the snow load applied to the branch line.

[Conventional technology]

It is well known that wooden and concrete pillars that support electric wires and cables are reinforced against wind pressure loads and horizontal loads by installing branch wires, but when a large amount of snow falls, A large load is applied to the branch line due to the settling force of snow, etc., and as a result, the branch line may be stretched and, in the worst case, may break or the utility pole may collapse. Conventionally, there are devices to prevent such inconveniences, such as those developed in the 1980s.
- Proposed as No. 152756. This device is
The lower end of the heat pipe is buried deep underground so that it faces the high-temperature area generated by geothermal heat, and the upper end of the heat pipe is fixed along the pole branch line, allowing the heat pipe to carry the geothermal heat around the branch line. By melting the snow, the snow load on the branch lines is eliminated.

[Problems to be solved by the invention]

By the way, a heat pipe is a relatively thin tubular body with a small surface area per unit length. Therefore, in order to obtain the necessary and sufficient amount of heat, it is necessary to insert the end of the heat pipe to a point where the temperature is sufficiently high. In places where the temperature is not particularly high, it is necessary to increase the insertion length of the heat pipe to increase the surface area of the part used for heat input. However, with the above-mentioned conventional equipment, in order to obtain enough heat to melt snow on the branch line, it is necessary to bury the heat pipe deep underground to increase the length of the buried part of the heat pipe. The excavation work required special equipment and a long construction period, which caused the problem of soaring overall costs.

This invention was made against the background of the above-mentioned circumstances, and an object thereof is to provide a branch line snow melting device that is easy to construct and inexpensive.

[Means for solving problems]

In order to achieve the above object, the present invention forms the lower end side of a heat pipe using a corrugated pipe as a container in a spiral shape, and buries the spiral portion in a high temperature heat collecting part underground. , and is characterized in that the upper end of the heat pipe extending above the ground is fixed along with a branch wire stretched diagonally between the utility pole and underground.

[Effect]

In the device of this invention, during the snowy season, the temperature of the spiral buried part of the heat pipe becomes higher than that of the part along the branch line, so the lower end of the heat pipe underground becomes the heating part, and Since the upper end on the ground side becomes the cooling section, the geothermal heat applied to the heating section is carried to the cooling section and radiated, and as a result, the snow around the branch line is melted. And in this invention,
Since the underground portion is spiral-shaped and has a large surface area per unit depth, it is possible to obtain sufficient heat for snow melting without burying the heat pipe particularly deep. Furthermore, since this invention uses a heat pipe with a corrugated pipe as a container, the heat pipe itself becomes flexible, and therefore it is difficult to form the heating section into a spiral shape or to go to the construction site. In addition to this, the surface area per unit length of the heat pipe is wider, allowing for more heat input, making it possible to more reliably and adequately supply the amount of heat required for snow melting. You can get it.

〔Example〕

Next, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic diagram showing one embodiment of the present invention, in which a branch line 2 for reinforcing a telephone pole 1 supporting communication cables and electric wires is stretched diagonally. is made by twisting three or four mild steel wires together,
One end is fixed near the upper end of the utility pole 1, and the other end is fixed to an anchor 3 buried underground. A heat pipe 4 is closely fixed to the branch line 2 from approximately the middle to the lower part thereof, and the lower end part of the heat pipe 4 is formed in a spirally curved state and It is buried in the heat collecting part 5, which has a relatively high temperature. Here, the heat pipe 4 has a structure in which a corrugated pipe is used as a container and substantially only a condensable fluid is sealed inside the container as a working fluid, and the above-ground part is connected to branch lines using heat insulating tape, aluminum tape, etc. 2
is fixed. Although not specifically shown,
A portion of the heat pipe 4 that is close to the ground surface has a heat insulating structure to prevent heat radiation in that portion.

In the above device, during the snowy season, the temperature on the ground side is lower than the temperature of the underground heat collecting part 5, so the lower end of the heat pipe 4 located in the heat collecting part 5 becomes the heating part, and the branch line 2 Since the upper end side along with the heat pipe 4 becomes a cooling part, the working fluid sealed inside evaporates at the lower end side and the vapor flows to the upper end side and radiates heat, so that the heat pipe 4 Geothermal heat will be transported to the ground side to melt the snow around branch line 2. In that case, in the above device, the heat pipe 4
Since the part buried in the heat collecting part 5 and serving as the heating part has a spiral shape, the buried length of the heat pipe 4 per unit depth becomes long, and a corrugated pipe can be used as a heat pipe in a container. Since the heat pipe is made with a Since the heat transfer area as a heating part is large, there is sufficient heat input for snow melting, and the snow around the branch line 2 is melted and a hollow part is created, which prevents snow from coming into contact with the branch line 2, so snow accumulation on the branch line 2 is reduced. No load is applied, and accidents such as breakage can be prevented.

〔Effect of the invention〕

As explained above, in this invention, among the heat pipes that carry geothermal heat around the branch line to melt snow, the part that is buried underground and collects geothermal heat is formed in a spiral shape. The length of heat pipes existing in the area is longer, and since heat pipes using corrugated pipes as containers are used, the surface area per unit length of the heat pipe itself is larger, and therefore the area for heat collection, that is, the heating part, is larger. According to the present invention, the heat transfer area becomes wider, and therefore the depth at which the heat pipe is buried underground can be reduced in order to obtain the amount of heat required for snow melting. Because the excavation depth is shallow, construction costs can be reduced and the construction period can be shortened.Furthermore, since a heat pipe with a corrugated pipe as a container is used, the heat pipe itself has flexibility. Therefore, it is possible to facilitate the work of forming a spiral shape and the work of transporting it to the construction site, and in turn, it is possible to reduce the construction cost.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of the present invention. 1... Telephone pole, 2... Branch line, 4... Heat pipe, 5... Heat collecting section.

Claims (1)

[Claims] 1. The lower end of a heat pipe using a corrugated pipe as a container is formed into a spiral shape, and the spiral portion is buried in a high-temperature heat extraction section underground, and the upper end of the heat pipe is extended above ground. A snow melting device for a utility pole branch line, characterized in that the side is fixed along a branch line stretched diagonally between the utility pole and underground.