JPS6114283B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a snow melting and deicing device for preventing, for example, snow accumulation and ice formation on a road surface, and particularly to one using a heat pipe.

Figure 1 is a cross-sectional view showing a conventional snow melting and ice removal device using a heat pipe.1 is a heat pipe, one end (heat receiving part) 1a is buried in soil 2 at a depth of 3 to 12 m, and the other end (heat dissipating part) Part) 1b has a width of 1 to 4 m, for example.
or more concrete forming a road 3
It is embedded at a medium depth of 30 to 70 mm. The heat pipe 1 is made of a container made of iron, stainless steel, etc., and the inner surface of the container is lined with a porous material with capillary force such as metal gold steel or felt.
A small amount of working fluid such as Freon is sealed.

Next, the operation will be explained. Soil 2 has a depth of 2~
It is known that the temperature at depths deeper than 3 meters is approximately equal to the annual average temperature. For example, Sapporo 7.4℃, Yamagata
It is 10.7℃. When snow falls on the surface of the concrete 3 or the temperature drops, the temperature of the concrete 3 also falls, and the temperature of the vapor of the working liquid in the heat pipe 1 also falls. The heat receiving part 1a inside is heated by the soil 2. The working liquid in the heat pipe 1 heated by the soil 2 takes evaporation heat from the soil 2 and evaporates, and due to the slight vapor pressure difference between the heat receiving part 1a in the soil 2 and the heat radiating part 1b in the concrete 3, the working liquid in the concrete 3 The concrete 3 that flows to the heat dissipation part 1b inside condenses and liquefies because its temperature is lower than that of the soil 2. Concrete 3 at the same time
releases heat of condensation. The liquefied working fluid permeates into the porous material and is absorbed into the soil by the capillary forces of the porous material and by the action of gravity if the heat pipe is tilted so that the concrete end of the heat pipe faces upward. It flows back to the heat receiving part 1a inside. Through the circulation of the working fluid as described above, heat in the soil 2 is transferred to the concrete 3, thereby heating the concrete. If the ratio of the length of the part of the heat pipe 1 in the soil to the length of the part in the concrete is appropriately selected, the concrete surface can be kept at 0°C or higher even when the temperature is -15°C, and therefore the concrete surface It is designed to prevent water above from freezing and melt snow that accumulates on the concrete surface.

However, in the conventional device described above, since the heat pipe 1 is fixed in the soil 2, the heat pipe may be damaged due to the vibration of the concrete 3 that occurs when a large vehicle passes over the concrete 3, or the heat pipe may be damaged. 1 could not be easily removed, which resulted in drawbacks such as the impossibility of road repair work.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and in addition to burying a tube into which a heat pipe can be inserted underground, the heat pipe and the heat pipe are connected to the heat pipe inside this tube. The snow melting system contains a medium for transmitting heat and closes the upper end of the tube with a lid made of a flexible tube fixed to the circumferential surface of the heat pipe, which has vibration properties and allows the heat pipe to be easily removed. The purpose is to provide de-icing equipment.

FIG. 2 is a sectional view showing one embodiment of the present invention, and numerals 1 to 3 are the same as the conventional device described above.

11 is a pipe made of iron or stainless steel, etc., which is buried in the soil before the heat pipe 1 is buried.
Its inner diameter is larger than the outer diameter of the heat pipe 1. The heat pipe 1 is inserted and buried in the pipe 11 in such a manner that the portion 1a in the soil is inserted thereinto. A medium 12 such as water or oil is filled between the heat pipe 1 and the tube 11 to improve heat conduction.
A lid 13 is provided to prevent the water from evaporating and to prevent solid matter such as soil from entering. The lid 13 is connected to the heat pipe 1 as shown in FIG.
It consists of a flexible tube 14 fixed to the circumferential surface of the heat pipe 1 and a flange 15 for attachment to the tube 11, and it is effective to enable the heat pipe 1 to freely vibrate in the vertical direction.

The thermal conductivity of the medium 12 inserted between the heat pipe 1 and the tube 11 is not particularly limited, but may be approximately the same as that of the soil 2, and the operation of heating the concrete 3 by removing heat from the soil 2 is conventional. It is similar to the device. When a large vehicle passes over concrete 3 and the concrete 3 vibrates, heat pipe 1
Since it is not fixed in the soil 2 but in the liquid 12, it vibrates together with the concrete 1, and no excessive force is applied to the heat pipe 1, so that it will not be damaged.

Furthermore, when the concrete 3 is demolished to repair the road, the heat pipe 1 can easily come out of the soil 2, making it possible to repair the road.

Furthermore, when burying the pipe 11, unlike the heat pipe 1, there is no need to worry about the internal working fluid leaking out even if the pipe 11 is damaged. This also has the effect of reducing the cost of burying heat pipes.

In the above embodiment, the snow melting/ice removal device on roads has been described, but it may also be used for melting snow on railroad tracks, etc., and the same effects as in the above embodiment can be expected.

It is also possible to cut and remove only the horizontal part of a heat pipe that has been used for many years, leave the vertical part intact, and bury a new heat pipe that can be inserted inside. As described above, according to the present invention, a tube into which a heat pipe can be inserted is buried underground, a heat pipe and a medium for transmitting heat to this heat pipe are housed in the tube, and the upper end of the tube is Since the heat pipe is configured to be closed by a lid made of a flexible tube fixed to the circumferential surface of the heat pipe, damage to the heat pipe due to vibrations on the ground surface can be prevented, and the cost of burying the heat pipe can also be reduced. Furthermore, since the heat pipe can be easily removed from the soil, it has the effect of making it possible to carry out road repair work.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional snow melting/ice removal device using a heat pipe. FIG. 2 is a sectional view showing one embodiment of the present invention, and FIG. 3 is a sectional view of main parts showing another embodiment. In the figure, 1 is a heat pipe, 2 is soil, and 3
1 is concrete, 11 is a pipe, 12 is a medium, 13 is a lid, 1a is a heat receiving part, and 1b is a heat radiating part. The same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1 A heat pipe that melts snow or removes ice from the road surface or the ground surface using a heat pipe that has a heat radiating part located near the ground surface and a heat receiving part located deeper underground than the heat radiating part. A tube into which the heat receiving section can be inserted is buried underground, and the heat receiving section and a medium for transmitting heat to the heat receiving section are housed in the tube, and the upper end of the tube is connected to the circumferential surface of the heat pipe. 1. A snow melting and ice removing device, characterized in that the device is closed by a lid made of a flexible tube fixed to a lid.