JPH0314538Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a snow damage prevention device that is used in combination with a branch line that is fixed to a utility pole at one end, anchored in the ground at the other end, and stretched at a predetermined angle to the longitudinal axis of the utility pole. It is something. In cold regions, utility pole branch wires may be bent inward by the settling force of snow during the winter, causing accidents that not only result in the branch wires being severed, but also cause the poles to tilt or break. For example, of the approximately 20,000 utility poles installed in so-called heavy snowfall areas within the jurisdiction of Chubu Electric Power Co., Inc.'s Nagano office,
During the heavy snowfall of 1981, 67 utility poles, including 17 made of concrete, were broken, and 164 utility poles were found to be leaning. As a preventive measure, snow removal work is sometimes carried out around branch lines, but the work efficiency is extremely low at only 8 lines per person per day, requiring a large amount of manpower and expense. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a snow damage prevention device configured to automatically melt snow around a branch line by a simple means. That is, the snow damage prevention device according to the present invention includes a heat pipe that has a heating part that is buried underground and is heated by underground heat, and a heating part that protrudes above the ground surface and is arranged along a branch line. The heat radiating section is connected to the branch line so that the underground heat transferred from the heating section to the heat radiating section can be transferred to the peripheral area of the branch line. Hereinafter, the present invention will be explained with reference to the illustrated embodiments. FIG. 1 is a schematic diagram showing a snow damage prevention device for utility pole branch lines according to an embodiment of the present invention. The present invention is applied, for example, to a branch line 12 of a utility pole 11 installed on a slope 10, and one end 12a of the branch line 12 is fixed to the utility pole 11, and the other end 12b is anchored to underground 13. . A snow layer 14 is deposited on the slope 10. Therefore, if no measures are taken, the settling force of the snow layer 14 will act diagonally downward on the branch line 12 as shown by arrow A, and the branch line 12 will
Excessive tension acts on the poles, making it more likely that snow-damaged accidents such as branch lines will be cut, utility poles will tilt or break, etc. In the embodiment shown in FIG. 1, the snow damage prevention device is constituted by a heat pipe 15 having a heating section 15a extending in the vertical direction and a heat dissipating section 15b extending in a direction parallel to the branch line 12. The heating part 15a of the heat pipe 15 is, for example, approximately 2.5 to 5.0 m from the ground surface 10.
Bury it underground to a depth of 13. The heat dissipation part 15b of the heat pipe 15 is connected to the ground surface 1, for example.
It is arranged along the branch line 12 so as to protrude upward about 2 m from 0. The branch line 12 and the heat dissipating portion 15b of the heat pipe 15 can be connected to each other in a thermally conductive manner, for example, by using an aluminum adhesive tape. As is well known, a predetermined amount of heat medium 16 is sealed inside the heat pipe 15, and a large amount of heat is transported even when the temperature difference between the heating section 15a and the heat radiation section 15b is only about 2 to 3 degrees Celsius. have the ability. The effects of the embodiment shown in FIG. 1 are as follows. It is generally known that even in cold regions, the underground temperature at a depth of about 2.5 to 5.0 m is about 10 to 15°C, which is almost constant throughout the year. In the present invention, this geothermal heat is used to melt snow in the area surrounding the branch line 12. That is, when the heating part 15a of the heat pipe is heated by underground heat, the heat medium 16 evaporates in the heating part 15a and condenses in the heat radiation part 15b, so that the underground heat is distributed to the peripheral area of the branch line 12 adjacent to the heat radiation part 15b. radiated towards. As a result, branch line 12
As a result, a cavity 17 is formed around the branch line 12 by melting the snow in the area around the branch line 12, thereby effectively preventing the settling force of snow accumulation shown by arrow A from acting on the branch line 12. Note that the symbol B indicates a surrounding area where snow melting has started but has not yet been completed. According to the present invention, it is possible to eliminate the influence of the settling force of snow, so snow damage accidents such as cutting branch lines, tilting or breaking utility poles, etc. can be prevented. Next, the results of experiments actually conducted to confirm the effects of the present invention will be explained. As shown in Figure 2, the existing three branch lines 12A, 12B, 1
When starting an experiment targeting a utility pole 11 with 2C, a snow layer 1 accumulated to a thickness of approximately 3.0 m was used.
4 was removed using a snow machine, and two branch lines 12
A device according to the present invention, that is, heat pipes 15A and 15B were installed for A and 12B. Specifically, the heating part of each heat pipe 15A, 15B is arranged vertically so as to reach a depth of 3.0 m from the ground surface 10, and the heat dissipating part is connected to branch lines 12A, 12B over a length of 2.0 m. It was made to protrude above the ground surface. Branch lines 12A, 12B and heat pipe 15
The heat dissipating parts A and 15B were connected to each other by aluminum adhesive tape so as to be able to conduct heat. Furthermore, the snow was backfilled using a snow machine, and the heat pipe 15
A and 15B were buried in the snow layer. In order to make the conditions more severe than the natural snow settling force, the snow layer was compacted and the snow layer density was set slightly higher. The equipment was left in this state and snow melting using underground heat began. When 9 days had passed from the start of the experiment, the temperature of each site was measured, and the results shown in the following table were obtained.

[Table] As a result of the experiment, the following was further confirmed. That is, the heat pipes 15A, 15B used
had a diameter of approximately 3.2 cm, and a cavity (see cavity 17 in FIG. 1) with a width of approximately 10 cm was formed around the heat dissipation portions of the heat pipes 15A and 15B. Based on the formation of such a cavity, it was possible to easily displace the branch lines 12A, 12B provided with the device of the present invention over the entire cavity area by pushing by hand. This revealed that no excessive tension was acting on the branch lines 12A, 12B. On the other hand, the branch line 12C, which was not equipped with the device of the present invention, was so tense that it could not be pushed and displaced by hand. Therefore, the present invention was found to have the desired effects. The present invention has the advantage of being able to melt snow very easily and automatically without requiring external energy supply or workers, and greatly contributes to the prevention of snow damage in cold regions.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the principle structure of the present invention, and FIG. 2 is a schematic diagram illustrating the implementation status of experiments conducted to confirm the effects of the present invention. 10...Ground surface, 11...Electric pole, 12, 12A~1
2C...branch line, 13...underground, 14...snow layer, 15,
15A, 15B... Heat pipe, 15a... Heating section, 15b... Heat radiation section, 16... Heat medium, 17... Cavity, A... Sedimentation force, B... Snow melting incomplete area.

Claims (1)

[Scope of utility model registration request] A snow damage prevention device that is used in combination with a branch line that has one end fixed to a utility pole, the other end anchored in the ground, and is stretched at a predetermined angle to the longitudinal axis of the utility pole, The heat pipe has a heating section that is buried underground and is heated by underground heat, and a heat dissipation section that protrudes above the ground surface and is arranged along a branch line. A snow damage prevention device characterized in that it is connected to a branch line so that underground heat transmitted to the branch line can be transmitted to the surrounding area of the branch line.