JPH0340785B2 - - Google Patents

Description

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

[Prior art and its problems] For example, the towers of power transmission lines that pass through mountainous areas are subjected to settling force and/or moving pressure due to snow accumulation, which can damage the tower members or, in some cases, cause the tower itself to tilt. Things can happen. In order to prevent this, attempts have been made to increase the size of the members used or to use reinforcing members, but these countermeasures cannot be said to be perfect, including economic efficiency.

Therefore, consideration is being given to reducing the stress applied to members by melting snow using heat pipes using underground heat. The method involves burying one end of a heat pipe underground, while placing the other end along the component to be protected, and using underground heat to melt the snow around the component. It is a method. In this case, since the heat pipe does not have a protective part, the heat pipe may be exposed above the ground due to people climbing on it, grabbing it, or colliding with equipment during tower construction, maintenance, etc. It may deform or damage the parts. In addition, protection from flying objects and falling snow on top of the tower is also necessary.

[Object of the Invention] An object of the present invention is to provide a heat pipe type snow melting device that can protect a heat pipe from external forces and exhibit a snow melting effect over a long period of time.

[Summary of the Invention] The gist of the present invention is that a coil spring-shaped protection member is installed on the outer periphery of a heat pipe portion along a steel tower member to be protected, with a space between the heat pipe portion and the heat pipe portion.

[Embodiments of the Invention] Hereinafter, a snow melting device of the present invention will be described with reference to the drawings.

FIG. 1 shows a case where the heat dissipation part 12 of the heat pipe 1 is placed along the diagonal member 4 which is a reinforcing member at the lower part of the steel tower. In this case, the lower part of the steel tower includes a main column member 2, a horizontal member 3, and a main leg 5, and a heat pipe 1.
One end is buried in the ground 8 near the main landing gear 5 to serve as a heat collecting part 11, and the other end is placed above the diagonal member 4 at an appropriate interval to serve as a heat radiating part 12. There is. A protective member 6 made of a hard filament shaped into a coil spring shape is attached to the outer periphery of the above-ground portion of the heat pipe 1 at a distance from the heat pipe. 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 the heat underground at the heat collecting section 11, and transfers it to the ground for heat radiation. Heat is dissipated in the section 12. Even if part or all of the above-ground part of the heat pipe 1 is covered with snow 7, the heat pipe 1 continues to dissipate heat in the above-ground part. This heat is then radiated into the surrounding snow. As a result, diagonal member 4
The surrounding snow is melted and a snow cavity is formed around it, but the snow melting progresses due to settling (compaction) or movement of the snow 7 and the cavity is enlarged, thereby reducing the snow load applied to the diagonal member 4. Even if snow falls from the top of the tower during this time, the heat dissipation section 12 of the heat pipe 1 is protected by the member 6, so it will not be deformed or damaged. If a person climbs the tower for construction work or maintenance inspection during a period with no snowfall7, there is a protective member 6 installed on the heat pipe section, so if a person climbs on the tower or climbs on the Even if a portion is grabbed, the heat pipe is protected by the member 6 and will not be deformed or damaged. If this protective member 6 is colored in a different color from the steel tower, it will serve as a landmark and will be more effective in preventing deformation and damage.

FIG. 2 shows another method of attaching the member 6, in which the member 6 is arranged so as to reach the outer periphery of the diagonal member 4 in the diagonal member 4 portion.

The heat pipe 1 can most effectively utilize heat from underground when the above-ground part is buried in snow, but in the early stages of winter snowfall, sub-zero cold air acts on the heat pipe 1. At such times, the amount of heat radiated from the heat pipe is significant, and there is a risk that the heat underground 8 that can be used for snow melting will decrease. In such a case, by attaching a storm screen, heat insulating material, etc. using the member 6, and removing it at an appropriate snowfall season, it is possible to reduce the loss of underground heat. Of course, these may remain attached.

[Effects of the Invention] According to the present invention, since the protective member is arranged around the outer periphery of the portion of the heat pipe that runs along the steel tower member, the heat pipe can be protected from external forces, the snow melting effect of the heat pipe is enhanced, and the heat pipe is protected against the steel tower member. It is possible to reduce the load caused by accumulated snow over a long period of time, and to significantly reduce the cost of steel tower members.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention, and FIG.
The figure is an explanatory diagram showing another embodiment. 1: Heat pipe, 2: Steel tower main pillar material, 3: Horizontal material, 4: Diagonal material, 5: Main leg, 6: Protective member, 11:
Heat collection part, 12: Heat radiation part.

Claims (1)

[Claims] 1 In a device that melts snow by burying one end of the heat pipe underground and placing the other end along the steel tower member that is to be protected from snow accumulation, the part of the heat pipe that runs along the steel tower. A steel tower snow melting device characterized in that a coil spring-like protective member is installed along the outer periphery of the portion with a space between the outer periphery of the portion and the outer periphery of the portion.