JPH0351869B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a snow melting device for protecting steel towers constructed in snowy areas, such as power transmission line towers, ski lift towers, etc. This relates to a steel tower snow melting device that uses heat pipes.

[Prior art and its problems] For example, when a transmission line tower passes through a mountainous area, snowfall may apply settling force and/or moving pressure to the tower, causing damage to the tower members or, in some cases, causing the tower to tilt. can occur. In order to prevent this, measures have been taken to increase the size of the members used or to use reinforcing members, but these countermeasures cannot be said to be perfect in terms of economic efficiency.

Therefore, consideration is being given to reducing the stress applied to members by melting snow using heat pipes using underground heat.

However, it is impossible to reduce the force of snow only by melting snow using heat pipes, and it is also necessary to protect the heat pipes themselves from external forces such as falling snow from the top of the tower.

[Objective of the Invention] The object of the present invention is to provide a snow melting device that can promote the stress reduction effect of members due to heat pipe snow melting, protect heat pipes from external forces such as falling snow, and exhibit snow melting effects over a long period of time. It is about providing.

[Summary of the Invention] The gist of the present invention is that a rib-shaped member is attached above the heat radiating part of the heat pipe along the upper side of the steel tower member to be protected, and thereby This reduces the settling force of snow that acts on the heat dissipation part of the heat pipe and the steel tower member, and protects the heat pipe itself from external forces.

[Embodiments of the Invention] The snow melting device of the present invention will be described below with reference to the drawings. FIG. It shows the case. In this case, the lower part of the steel tower is equipped with a main column member 2, a horizontal member 3, and a main leg 5, and one end of the heat pipe 1 is buried underground 8 near the main leg 5 to provide a heat collecting section. 11, and the other end side is arranged above the diagonal member 4 with an appropriate interval. As shown in FIG. 2, a rib-shaped member 6 is attached to the upper side of the above-ground part of the heat pipe 1. As shown in FIG.

In such an arrangement, when the temperature around the steel tower becomes lower than the temperature underground 8 in winter, the heat pipe 1 uses its heat transfer action to absorb heat from the underground at the heat collecting section 11 and radiates the heat at the above ground section. It becomes like this.
Even if part or all of the above-ground part of the heat pipe 1 is covered with snow, the heat pipe 1 continues to dissipate heat in the above-ground part. Most of this heat is radiated to the snow 7. As a result, the snow around the diagonal member 4 is melted and a snow cavity is formed therein, but the snow melting progresses due to settling (compaction) or movement of the snow, and the cavity is enlarged. When the snow becomes compacted and settles, the heat pipe heat dissipation section 12 and the diagonal material 4 become obstacles, and the snow layer becomes curved as shown in Fig. 3. A downward force called sedimentation force acts, but since there is a rib-shaped member 6 on the upper side of the heat radiating part 12, the lines of force are cut and become discontinuous, and the heat pipe heat radiating part 12
This reduces the load applied to the diagonal members 4 together with snow melting.

FIG. 4 shows experimental results regarding the effect of the rib-like member 6 on reducing the settling force.

In this experiment, the rib-shaped member 6 was continuously placed directly above the portion corresponding to the diagonal member 4.
From the results of this experiment, it can be seen that when the height l of the member 6 is 10 mm or more, the effect of reducing the sinking force is greater than in the case of a heat pipe alone. This is presumed to be because, as shown in FIG. 3, the range in which the left and right lines of force become discontinuous is wider than in the case of the heat pipe 1 alone.

Although the illustrated example shows a case in which the rib-like member 6 is placed continuously, it may be installed in a state where it is separated from the heat pipe through a spacer or the like, or it may be installed without being continuous. It may be discontinuous. Of course, the shape of this member 6 is not limited to the illustrated example, nor is the material thereof limited.

[Effects of the Invention] As is clear from the above description, the present invention has a member attached to the heat pipe heat dissipation section that cuts the lines of force of the snow. The load due to snow accumulation can be effectively reduced, and the cost of the member can be significantly reduced. Furthermore, since the member can act as a rib, it is possible to not only improve the mechanical strength of the heat pipe, but also to provide protection against snow falling from the top of the tower.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the snow melting device according to the present invention, FIG. 2 is an enlarged cross-sectional view of the main part, and FIG.
The figure is a diagram showing the effect of cutting lines of force by the attached members, and FIG. 4 is a graph showing the experimental results of the attached members. 1: Heat pipe, 2: Steel tower main pillar material, 3: Horizontal material, 4: Diagonal material, 5: Main leg, 6: Rib-shaped member,
7: Snowfall, 8: Underground, 11: Heat collection section, 12: Heat radiation section.

Claims (1)

[Claims] 1. In a device in which one end of a heat pipe is buried underground as a heat collecting part and the other end is placed above a steel tower member to be protected as a heat radiating part along the steel tower member, the heat pipe is A steel tower snow melting device, characterized in that a rib-shaped member is attached above the heat radiating part along the heat radiating part.