JPS62133261A - Method for preventing cutting of utility pole branched cabledue to ice and snow - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method of melting ice and snow attached to a branch line of a utility pole using a heat pipe to prevent the branch line from being cut due to ice and snow.

(Prior Art) FIG. 3 is a schematic explanatory diagram of a method for preventing ice and snow cutting of utility pole branch lines using a heat pipe.

In the drawing, (1) is a utility pole, (2) is its branch line, and (3 is
') is a heat pipe, the heat absorption and evaporation part (31') of the heat pipe (3') is buried in the soil (4), and its heat dissipation and condensation part (32') is located in the snow-covered part of the branch line (2). It is located along the However, the heat pipe (3'
), the soil heat from 3 to 5 meters or deeper underground is pumped up by endothermic evaporation m (31'), and this heat is radiated at the heat dissipating V line section (32') above the ground to remove ice and snow around the branch line (2). This is a method to prevent the branch line (2) from being cut due to ice and snow.

(Problems to be Solved) In the above-described method of preventing ice and snow cutting of utility pole branch lines using heat pipes, effective use of soil heat is important. That is, by pumping up too much soil heat, there is a risk that there will be insufficient soil heat when snow melting is required in March and April, making it impossible to melt ice and snow around utility pole branch lines.

In the conventional method, the radiation Q condensing part (32') of the heat pipe (3') with a circular cross section was arranged along the branch line (2), but as shown in Fig. 4, the part in the snow was In,
In particular, areas that do not require snow melting (A) will inevitably melt, and areas that require snow melting (B) will have difficulty melting snow, making it impossible to say that soil heat is being used effectively. Ta. Ideally, this would melt the snow evenly around the heat pipe, but the area where the heat pipe is in contact (
The heat reaches the snow in A) sufficiently, and the heat pipe (3″)
This is because it is difficult for the back side of the branch line (2) to receive sufficient heat and melt the snow.

As a result, too much soil heat will be pumped up, making it difficult to continue to supply the necessary and sufficient heat during the period when snow melting is required.

(Means for Solving the Problems) The present invention provides a method for preventing ice and snow breakage of utility pole branch lines using heat pipes that solves the above-mentioned problems. This is due to the fact that it is wound spirally around a branch line.

(Embodiment) FIG. 1 is an explanatory diagram of an embodiment of the method for preventing ice and snow cutting of utility pole branch lines according to the present invention, and the same symbols as in FIG. 3 represent the same parts.

In this example, an easily bendable copper or aluminum pipe with an outer diameter of about 4 mm to 10 mm is used as the heat pipe container, and the heat pipe is placed underground from 1 mm to 10 mm.
It should be buried at a depth of 8 m or more, and the above-ground part should be at a height higher than the snowfall at the place where it is installed, for example, 3 to 3 m above the ground.
Wrap it spirally around the branch line (2) to a height of 4 m.

If the outer diameter of the heat pipe container is less than 4 φ, the required amount of heat will not be obtained, and if the outer diameter exceeds 1011-φ, it will be difficult to wrap it around the branch line (2), so 4 I
The outer diameter is preferably about φ to 10 mmφ, for example, the outer diameter is 61 mm.
In the case of a 1φ copper heat pipe and working fluid R12, the maximum heat transport m is approximately several tons of water, and the soil heat is not used up during the first period of winter. Regarding snow melting, melting snow from one to several points on the surface of the branch line (2) to which ice and snow have adhered is sufficient to prevent the branch line from breaking, and 6■■φ
Even heat pipes have sufficient snow melting ability.

FIG. 2(A) is a cross-sectional view of another embodiment of the present invention.
In the illustrated embodiment, a heat insulating layer (5) made of plastic material is provided on the outer periphery of the support 1j (2).

In order to prevent the heat pumped up from the soil by the heat pipe (3) from being dissipated via the branch line (2), an insulation M Pj (5) made of a plastic material that acts as a heat resistance is provided on the outer periphery of the heat pipe (3). This prevents too much soil heat from being pumped up.

Polyvinyl chloride, polyethylene, nylon, Teflon, etc. are used as the plastic material for the heat insulating layer (5), and its thickness is determined as the thermal resistance between the branch line (2) and the heat pipe (3) increases. 2) Because the heat dissipation through the
s ■ or more.

FIG. 2(b) is a cross-sectional view of still another embodiment of the present invention, in which a branch line (2) provided with a heat insulating layer (5) as shown in FIG. 2(a).
A heat insulating layer (6) made of plastic material is provided on the outer periphery of the heat pipe (3) and the heat pipe (3).

It is preferable to change the thickness of this retainer (li) depending on the soil temperature so that the necessary and sufficient snow melting to prevent excessive pumping of soil heat occurs. For example, when the soil temperature is 3 to 5 meters underground, When the soil temperature is relatively low, about 10"C, the coating thickness is thin, about 0.1 to 0.5 days' worth, and when the soil temperature is relatively high, about 15 degrees Celsius, it is thick, about 1-snow.

Physically, this heat insulating layer (6) has the effect of separating the ice and snow around the heat pipe (3) and the branch line (2) so that it is easier to slide down, and thermally, the heat is used relatively evenly. There is a small difference in snow melting around the heat pipe (3) and snow melting on the back side of the branch line (2) when viewed from the heat pipe side, so heat can be used effectively.

The heat-retaining layer (Ii) may be preferably covered with, for example, a sticky tape made of polyvinyl chloride or polyethylene, or a shrinkable tube thereof.

Furthermore, in the embodiment shown in FIG. 2 (b), a metal layer with low thermal resistance, such as aluminum or copper, is provided on the outer periphery of the branch line (2) and the heat pipe (3), and a heat insulating layer is placed on top of the metal layer, such as aluminum or copper. (6) may also be provided. By doing this, the temperature difference between the branch line (2) and the heat pipe (3) is reduced by one month, and even more effective use of soil heat can be achieved.

(Effects of the Invention) According to the above-described method for preventing ice and snow breakage of utility pole branch lines of the present invention, since the heat pipe is wrapped around the outer circumference of the branch line, heat is uniformly transmitted over the outer circumference of the branch line, resulting in stable heat pumping. It is possible to increase In particular, when using a small diameter copper or aluminum pipe with an outer diameter of 4 mm to 10 mm as a heat 1 inch container, it is easy to wrap it around the branch line, and it is stable at TL during the snowy season. Snow melting is possible.

In addition, by providing a heat insulating layer on the branch line and installing an insulation layer between the branch line and the heat pipe, it is possible to prevent too much geothermal heat from being pumped up and to melt snow more evenly around the heat pipe and on the back side of the branch line. This makes it possible to make even more effective use of soil heat.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the method for preventing ice and snow cutting of utility pole branch lines according to the present invention, and FIGS. 2(a) and 2(b) are cross-sectional views of other embodiments. FIG. 3 is an explanatory diagram of the conventional method, and FIG. 4 is an explanatory diagram of the problems of the conventional method. 1... Telephone pole, 2... Branch line, 3... Heat pipe,
4... Soil, 5... P8 notification, 6... Heat retention layer.

Claims (4)

[Claims] (1) The heat absorbing and evaporating part of the heat pipe is buried underground, and the heat dissipating and condensing part is placed along the branch lines of utility poles, using geothermal heat to melt the ice and snow that adheres to the branch lines of utility poles. A method for preventing ice and snow from cutting a utility pole branch line, characterized in that a heat pipe on the ground is wound around the utility pole branch line in a spiral manner. (2) The heat pipe container has an outer diameter of 4 mmφ to 10 m.
2. The method for preventing ice and snow cutting of a utility pole branch line according to claim 1, wherein the pipe is a copper pipe or an aluminum pipe of mφ. (3) The method for preventing ice and snow breakage of utility pole branch lines as set forth in claim 1, characterized in that a heat insulating layer of plastic material is provided on the outer periphery of the utility pole branch lines. (4) A method for preventing ice and snow breakage of utility pole branch lines as set forth in claim 1 or 3, characterized in that a heat insulating layer is provided on the outer periphery of the utility pole branch line and the heat pipe.