JPS59217878A - Iron tower to which snow is hardly adhered - 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 The present invention relates to a snow tower, more specifically, a snow tower that has a heat pipe, and uses the heat pipe to heat constituent members of an arm that supports electric wires. It is related to snow towers.

Snow accumulates on towers for overhead power transmission lines built in snowy regions, which freezes into ice and falls, hitting and damaging jumper wires directly below, and sometimes causing harm to people who happen to be below. may be given. Adhering snow or ice normally loses the balance between gravity and adhesion force when it reaches a certain level of weight and falls, so naturally it exerts a considerable impact force. In addition, in multi-circuit towers with multiple arms installed above and below, snow or ice that falls from the upper arms may not only hit the jumper wires directly below, but also the electric wires, jumper wires, or insulators further down. There is a possibility that you will be hit, but in such a case, the impact will be even greater because you will be accelerated by gravity.

Previously, maintenance workers had only been able to manually remove this kind of snow, especially in cases of heavy snowfall or in rural areas, leaving the area almost defenseless. .

The present invention improves such conventional steel towers and provides a novel snow-resistant steel tower that melts and removes snow by the action of heat pipes without requiring much human labor.

Hereinafter, embodiments of this invention will be described with reference to the drawings.
1 to 8 show an example of the structure of a heat pipe used in carrying out the present invention and its characteristics. The heat pipe 1 has a container 11 in the shape of a hollow cylinder. A large number of groups 12 extending in the longitudinal direction are formed on the inner circumferential wall, and each group is filled with a wick 13 having a high capillary pressure, such as carbon fiber, and is arranged coaxially with the container 11. It is pressed down and held by a mesh wire gauze 14. After the container 11 is evacuated, it is filled with a working fluid 18 having a relatively large heat of evaporation, such as water, chlorofluorocarbon ammonia, methanol ammonia, etc., through a filling port 16 provided at its longitudinal end, and sealed with a cap 15. be done.

The heat pipe 1 having such a structure operates as follows. When heating one end of the heat pipe 1, for example, the portion toward the left end in FIG. 1, from the outside, the working fluid 18 is sequentially evaporated from the part A, becomes a gas, and moves inside the depressurized container 11 at a speed close to the speed of sound. Then, it flows to the right end section C on the opposite side, where it condenses and becomes a liquid, dissipating heat to the surroundings. The liquefied working fluid 18 is refluxed to the part A by the capillary action of the wick 13 and the wire mesh 14, where it is heated again and evaporated, repeating the above-mentioned changes.

Part A is called a heating part or evaporation part because the working fluid 18 is heated from the surroundings and evaporates in this part, and part C is called a heat radiation part or condensation part because the working fluid 18 condenses in this part and radiates heat to the surroundings. called the department. Further, the B section between the A section and the C section is called a heat insulating section because there is no heat exchange between the working fluid 18 and the surroundings. working fluid 18
If you stand next to it, as mentioned above, part A is the heating part, and part C is
Although the part is a heat dissipation part, from the perspective of things other than the heat pipe that are close to the heat pipe 1, in the A part, heat is taken away by the working fluid 18 in the heat pipe and cooled, and in the C part, the heat is removed. It will be heated by receiving heat radiation from the pipe 1. As described above, according to the heat pipe 1, thermal energy can be rapidly transported along the longitudinal direction of the heat pipe by changing the state of the working fluid 18 without requiring any power.

Additionally, regarding the dimensions and material of the heat pipe 1,
The diameter ranges from a few to several dozen, and the length can reach as much as 100m1, and since they are mainly made of copper, stainless steel, aluminum, etc., they are resistant to rust and corrosion and have sufficient durability. .

FIG. 8 is a graph showing the heat conduction characteristics of the heat pipe 1 having such a configuration. This graph has a diameter of 16m and a length of 3
This graph shows the elapsed time and the temperature rise at the other end after one end of the 00-tone heat pipe was immersed in 80°C hot water to a depth of 150 cm.As can be seen from this graph, the temperature at the other end Its excellent thermal conductivity, which reaches over 70℃ in about 20 seconds and reaches almost the same temperature (78℃) after 1 minute, is incomparable to ordinary copper pipes of the same diameter and length. This is what I did.

Now, FIG. 4 shows an embodiment of the structure around the steel tower to which this invention is applied, and shows the arm 102 of the steel tower 101.
A jumper wire 104 of the electric wire 103 supported under tension extends horizontally directly below the arm 102 . Therefore, if the ice and snow accumulated on the arm 102 falls, there is a very high possibility that it will directly hit the jumper wire 104 (G).

Now, if the above-mentioned heat pipe is placed along the members constituting this arm 102 and the heat pipe is used to maintain the members at a temperature of 0°C or higher, it will be effective to prevent ice and snow from accumulating on the arm 102. can be prevented.

Various cross-sectional shapes can be used as the constituent members of the arm 102, but if the angle 201 is used as shown in FIG. Shall I follow it? ? Often, as shown in FIG.
It is sufficient to install it inside the heat pipe 1, which is convenient because the heat pipe 1 is not directly affected by rain or snow. In any case, there is no need to directly heat the entire general steel arm 102; heating a part of it will cause the heating effect to extend to the entire steel arm from the thermally conductive steel arm.

As a heat source for the heat pipe, AC power, solar heat, geothermal heat, etc. can be used. Figure 7 (power S1 showing an example of using geothermal energy) This example has the advantage of being able to use an infinite heat source for free.In other words, the underground temperature is generally at a depth of several meters from the earth's surface. is said to be almost constant, unaffected by seasonal changes.

Furthermore, not only when the steel tower is installed in a volcanic zone, but also in normal areas, the temperature at a depth of several meters below the surface is 10 degrees Celsius or more, which is sufficient as a heat source temperature for snow melting. . Therefore, if the heating part A of the heat pipe 1 is buried several meters underground as shown in FIG. This will prevent snow and ice.

In this case, the suitable working fluid is chlorofluorocarbon ammonia or the like, which is used in a temperature range of 0 DEG C. to room temperature.

In addition to the above geothermal heat sources, although not shown in the diagram,
A resistance heating device such as a nickel-chromium wire is installed, and this
A configuration in which the heating portions of the heat pipes are connected can also be considered as one embodiment. This embodiment has the advantage of saving length, which is particularly useful in areas with heavy snowfall.

Although not shown in the drawings, it is also possible to use solar cells as another embodiment. Direct sunlight is generally not expected during snowfall, but if the battery has a sufficient light-receiving area, the purpose of snow melting can be fulfilled.

As described above, it should be understood that many embodiments of the present invention can be considered by employing various heat sources.

As described above, the snow-resistant steel tower of the present invention does not have a so-called post-processing function of removing accumulated snow and ice, but has a function of preventing snow and ice from occurring. It has the excellent effect of completely preventing damage to electric wires, insulators, etc. and harm to people and others due to detachment and falling of wires.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing an example of the structure of a heat pipe used in constructing this invention, and FIG. 2 is a cross-sectional view of FIG.
8 is a club showing the thermal conductivity of a heat pipe, FIG. 4 is a schematic side view showing an example of a structure near a steel tower to which this invention is applied, and FIGS. 5 and 6 are FIG. 7 is a cross-sectional view showing how a heat pipe is attached to an arm component of a steel tower, and FIG. 7 is a schematic front view showing an embodiment of the present invention when geothermal heat is used as a heat source. 1... Heat pipe, A-K heating section, C... Heat dissipation section,
101... Steel tower, 102 Arm, 103... Electric wire, 104... Jumper wire, 201.202... Arm component, E... Heat source. Mamoru Takeuchi, Patent Attorney Agent Figure 1 Overaccented VT - Darkness Figure 4

Claims (1)

[Claims] A snow-resistant steel tower in which at least one heat pipe is provided along a horizontal member or diagonal member constituting the steel tower, and an appropriate heat source is provided in close proximity to a heating part of the heat pipe.