JPH0322445Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a device for melting snow on branch lines supporting utility poles.

PRIOR ART It is well known that among the supports of power transmission lines, wooden poles and concrete poles are provided with branch wires to provide reinforcement against wind pressure loads, horizontal loads, and the like.
The branch line is usually a stranded wire made by twisting together three or more mild steel wires with a diameter of about 4 mm, and is strung diagonally between the utility pole and the underground anchor. Since this branch line is placed in the natural environment along with the power transmission line, the number of strands and the diameter of the strands are determined and constructed with consideration to environmental changes, but in any case, the branch line is made of solid stranded wire. Because it is used in cold regions or in unexpected environments, abnormalities may occur. In other words, if a branch line is buried in snow due to a large amount of snow, or if it is subjected to a large wind pressure load with a large amount of ice and snow, the load will become extremely large and the branch line may break or the utility pole may become damaged. Accidents such as falling may occur.

Conventionally, as a device to prevent such accidents, a device that uses geothermal heat to melt snow was developed in 1982-152756.
It is proposed by No. This device has one end of the heat pipe in contact with a branch line, and
The other end of the line is inserted into the ground, and the heat pipe is used to transport geothermal heat around the branch line to melt snow.

Problems that the invention aims to solve: With the conventional device described above, the amount of snowfall differs depending on the area where the wooden pole or concrete pole is installed, so the length of the heat pipe attached to the branch line is adjusted according to the amount of snowfall. is set.

However, when more snow falls than expected, the heat pipe becomes completely buried in the snow, and the snow above the heat pipe is not melted by the heat carried by the heat pipe, and the load of the snow is transferred to the branch line. There was a problem that the branch line would become disconnected.

Therefore, if the length of the heat pipe attached to the branch line is set to be longer than the amount of snow that is normally expected, it is possible to reliably prevent the accident of cutting the branch line due to snow accumulation. Setting the length of the pipe is wasteful, and the resulting cost increase cannot be ignored.

The purpose of this invention is to solve the above-mentioned problems and provide a snow melting device for utility pole branch lines that can completely prevent branch line breakage accidents even when unexpected snowfall occurs.

Means for Solving the Problems In this invention, a separate heat pipe is connected to the upper end of the heat pipe so that the same effect as a long heat pipe can be obtained.

In other words, the upper end of the heat pipe is fixed along a branch wire strung diagonally between a utility pole and an underground anchor, and the lower end of the heat pipe is fixed along a branch line that is diagonally stretched between a utility pole and an underground anchor. In a snow melting device for a utility pole branch line inserted into a high heat collecting section, a separate heat pipe is connected to the upper end of the heat pipe in a heat transferable and detachable manner and extended upward along the branch line. It is characterized by becoming.

Function When snow falls to the position of the heat pipe connected to the top, the heat carried from underground by the heat pipe at the bottom is transferred to the connected heat pipe, and the heat is transferred to this connected heat pipe. Since the heat from the connected portion is carried to the upper end of the added heat pipe, the snow surrounding the added heat pipe at the top is also melted by the carried heat.

Embodiments Hereinafter, embodiments of this invention will be described based on the drawings.

FIG. 1 is a schematic diagram showing an embodiment of this invention, in which a branch line 2 for reinforcing a utility pole 1 has one end fixed to the utility pole 1 and the other end attached to an underground anchor 3. By fixing it, it is stretched diagonally to the utility pole 1. This branch line 2 is made of twisted mild steel wires, for example, and a heat pipe 4 is attached and tightly fixed to the lower part from approximately the middle part of the branch line 2, and the lower end of the heat pipe 4 is connected to the underground temperature. It is inserted up to the relatively high heat collecting part 5. Here, the heat pipe 4 has a structure in which only a condensable fluid is substantially sealed as a working fluid, and the length of the upper end side along the branch line 2 is based on the assumption of a normal snowfall amount. is set.

A supplementary heat pipe 6, which is separate from the heat pipe 4, is attached to and closely fixed to the upper to middle portion of the branch line 2. This supplementary heat pipe 6 has approximately the same diameter as the heat pipe 4, and its lower end is connected to the upper end of the heat pipe 4 with a close contact portion for heat transfer.

Then, during snowfall, the temperature on the ground side becomes 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.
In addition, the upper end side along the branch line 2 serves as a cooling section, and the working fluid sealed inside the heat pipe 4 evaporates at the lower end side, and the vapor flows to the upper end side to radiate heat. Then, the heat pipe 4 carries the geothermal heat to the ground side and melts the snow around the branch line 2. At this time, the lower end of the additional heat pipe 6 is heated by the geothermal heat carried to the ground side by the heat pipe 4 and becomes a heating part, and the lower end of the supplementary heat pipe 6 becomes a cooling part, which is sealed inside. The working fluid evaporates at the lower end and radiates heat at the upper end, and the branch line 2
melt the snow around it.

A typical method of connecting the heat pipe 4 and the additional heat pipe 6 is, for example, as shown in FIG. 2, by overlapping the lower part of the additional heat pipe 16 with the upper part of the heat pipe 14. There is an external binding method in which the parts are brought into close contact with each other and they are fastened together using metal tape, etc., and as shown in FIG. Fitting recesses 26a are formed at the lower ends of the additional heat pipes 26, and the fitting protrusions 24a and the fitting recesses 26a
There is a fitting method in which the fitting protrusions 24 and 24 are fitted together to increase the area of contact with each other.
A may be formed with a male thread in the fitting recess 26a, and a female thread may be formed in the fitting recess 26a, and the connection may be made by screwing together. Shaped fitting recess 36a
The fitting protrusion 34a of the other heat pipe 34 is
It may also have a star-shaped cross-sectional shape that fits into the fitting recess 36a (see FIG. 5).

Effects of the invention As explained above, the snow melting device for utility pole branch lines of this invention has a separate heat pipe connected to the upper end of the heat pipe in a heat transferable and detachable manner and extending upward along the branch line. Therefore, even if there is more snow than expected, the snow is melted by a separate heat pipe attached to the upper end of the heat pipe, which not only reliably prevents the accident of cutting the branch line due to snow, but also allows the heat pipe to be used in rare cases. Because there is no need to set it for a long time to match the heavy snow that only occurs in
There is no waste and costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an embodiment of this invention, FIG. 2 is an explanatory diagram showing an external binding method of connection, and FIG. 3 is an explanatory diagram of a fitting method of connection.
FIGS. 4 and 5 are sectional views of main parts showing different examples of the fitting method. 1... Utility pole, 2... Branch line, 4... Heat pipe, 4a... Fitting protrusion, 5... Heat collection section, 6... Heat pipe for addition, 6a... Fitting recess, 14,
24, 34...heat pipe, 24a, 34a...
...Fitting protrusion, 16, 26, 36... Heat pipe for addition, 26a, 36a... Fitting recess.

Claims (1)

[Scope of utility model registration request] The upper end of the heat pipe is fixed along a branch wire strung diagonally between the utility pole and the underground anchor, and the lower end of the heat pipe is attached to the underground where the temperature is high. In a snow melting device for a utility pole branch line inserted into a heating section, a separate heat pipe is connected to the upper end of the heat pipe in a heat transferable and removable manner and extends upward along the branch line. A snow melting device for utility pole branch lines featuring: