JPH0681307A - Heat pipe type road snow melting device - Google Patents

Abstract

PURPOSE:To effectively melt snow or prevent freezing on the road surface by effectively utilizing the heat of the hot water flowing in a side ditch. CONSTITUTION:Evaporation sections 30 at one end side of multiple heat pipes 3 arranged at the preset pitch P toward the longitudinal direction of a road 2 are arranged in a side ditch 1 provided at the shoulder section of the road 2 and guiding the hot spring water H, and condensation sections 31 at the other end side are arranged immediately below the road surface 20 of the road 2. The heat of the hot spring water H is radiated below the road surface 20 by the heat transportation action of the heat pipes 3, and snow is melted or freezing is prevented on the road surface 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing snow melting and freezing on a road surface, and more particularly to a heat pipe road for melting snow on a road surface by utilizing heat of hot water such as hot spring waste water and various cooling waste water. The present invention relates to a snow melting device.

[0002]

2. Description of the Related Art Conventionally, an electric heating type and a hot water circulating type have been widely used as devices for preventing snow melting and freezing on roads. In the case of the electric heating type, a heating wire is embedded right under the road surface of the road, and when the temperature drops and snow is generated on the road surface, the heating wire is energized, and the heating surface heats the road surface to melt or freeze the road. It is to prevent it. Further, in the hot water circulation system, for example, a meandering heating pipe is embedded right under the road surface, and a warm water circulation pump or a warm water heating device is provided so that when the snow melting is necessary, the warm water circulation pump is used to heat the warm water. And the hot water heating device are circulated, and the road surface is heated by hot water through a heating pipe to prevent snow melting and freezing on the road.

[0003]

However, in the case of the above-mentioned electric heating type, it requires manpower for maintenance and management of equipment, and it requires running cost because electric power needs to be supplied to the heating wire. There was an inconvenience.

Further, even in the above hot water circulation system, it requires manpower to maintain and manage the equipment, and fuel and electric power are required to operate a hot water heating device such as a boiler and a hot water circulation pump, which results in running cost. There was an inconvenience that it cost.

On the other hand, hot spring water can be circulated in the heating pipe to dispense with a hot water heating device or a hot water circulation pump. In this case, the components dissolved in the hot spring water are aggregated and heated. There is an inconvenience that it adheres to the pipe, causes clogging and corrosion, and shortens the service life of the equipment. Further, a pump is required to flow the hot spring water into the heating pipe, and in this case as well, there is a disadvantage that manpower is required for maintenance and management of the equipment, and electric power is required, resulting in running cost.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a device for effectively preventing snow melting and freezing of roads by effectively utilizing the heat of hot water flowing in the gutters. Is.

[0007]

As a means for solving the above problems, in the heat pipe type road snow melting apparatus of the present invention, the evaporation portion on one end side of the plurality of heat pipes is provided in the shoulder portion of the road. The heat pipes are respectively arranged in the side channels in which hot water flows, and the condensers at the other ends of these heat pipes are arranged directly below the road surface of the road.

[0008]

In this heat pipe type road snow melting device, the evaporation part of the heat pipe is heated by the hot water flowing in the gutter to evaporate the working fluid inside and move it in the state of vapor to the condensation part side. At the same time, the working fluid in the vapor phase is condensed and liquefied in the condensing section, and the latent heat is radiated to the position just below the road surface on the low temperature side. Then, this heat pipe recirculates the liquid-phase working fluid back to the evaporation section, and repeats the same heat transport. Therefore, the heat from the hot spring water is radiated by the heat pipe arranged immediately below the road surface of the road, so that the snow on the road surface is melted by this heat and the road surface is also prevented from freezing.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a side view of a heat pipe type snow melting apparatus for melting snow on a road by using heat of hot spring water flowing in a gutter, and FIG. 2 is a plan view of this heat pipe type snow melting apparatus. In the figure, 1 is a gutter provided in the shoulder portion of the road 2 in the longitudinal direction of the road 2, the upper part of which is covered with a lid 10, and the inside is provided with an inclined surface formed at the bottom. Hot spring water H is being washed away. The gutter 1 is formed by connecting a plurality of U-shaped concrete blocks with a lid and burying them in the ground so that the upper surface of the lid is at the same level as the road surface 20 of the road 2. The hot spring water H flowing in the gutter 1 may be used hot spring waste water or unused hot water, but has a temperature that can be sufficiently used as a heat source for snow melting.

The road 2 on one side of the gutter 1 is a roadbed 22 on which a paving material 21 such as concrete or asphalt is cast, and the road surface 20 is inclined so as to be lowered toward the gutter 1. In addition, rainwater and snowmelt water can be collected in the gutter 1 from holes (not shown) provided in the lid 10. In the case of this embodiment, the gutter 1 in which the hot spring water H flows is provided on both shoulders of the road 2.
The road surface 20 of the road 2 has a mountain shape in which the central portion in the width direction is the highest, but since the left and right are symmetrical, only one side groove 1 side will be illustrated and described below.

The heat pipe type snow melting device is
It is composed of a plurality of heat pipes 3 penetrating the side wall 11 of the gutter 1 and arranged below the road surface 20 of the road 2, and receives heat received from the hot spring water H in the gutter 1 below the road surface 20. The heat is dissipated to prevent snow melting and freezing on the road 2. The heat pipe 3 is, for example, a vacuum degassed sealed tube in which a fluid that evaporates and condenses in a target temperature range such as CFC and alcohol is enclosed as a working fluid. It is arranged to be able to absorb heat, and the condensing part 31 on the other end side is arranged directly below the road surface 20, and the heat released from this condensing part 31 warms the road surface from below. The heat pipe 3 uses a corrugated pipe (corrugated pipe) that is easily bendable as its container pipe, and the evaporation portion 30 side disposed in the gutter 1 is for preventing corrosion by the hot spring water H. Is covered with a polyethylene resin film having a predetermined thickness.

The evaporation section 30 of the heat pipe 3 is shown in FIG.
As shown in the figure, the heat pipe 3 is arranged on the bottom portion 12 of the gutter 1 so as to be inclined with respect to the longitudinal direction of the road 2 by an angle θ so that the length of the heat pipe 3 can be sufficiently secured. The condensing part 31 extends in the width direction of the road 2 because the end of the evaporating part 30 in the gutter 1 is bent so as to be substantially orthogonal to the side wall 11 of the gutter 1.
The part exiting 1 is immediately bent upwards, and this side wall 11
After being extended upward into the pavement material 21 along the above, it is bent again in the pavement material 21 and extends to the center of the road 2 while tilting upward in the pavement material 21 along the road surface 20.

The heat pipes 3 are arranged in the longitudinal direction of the road 2 at a predetermined pitch P.
Is coarse on the side where the temperature of the hot spring water H on the upstream side of the gutter 1 is high, whereas it is gradually dense on the downstream side where the temperature of the hot spring water H has decreased due to heat dissipation or heat absorption by the heat pipe 3. There is. Then, the mortar 4 is placed around the evaporation portion 30 of the heat pipe 3 which is arranged on the bottom portion 12 of the side groove 1 while being shifted by a predetermined pitch.
And a new bottom of the side groove 1 is formed on the upper surface of the mortar 4.

The operation and effect of this heat pipe type snow melting apparatus will be described below. The working fluid in the evaporation part 30 of the heat pipe 3 is heated by the hot spring water H on the high temperature side that naturally flows in the side groove 1, and the vapor thereof is moved to the condensation part 31 side. The vapor of the working fluid uniformly discharges its latent heat from the condenser 31 to the pavement material 21 on the road 2 on the low temperature side, then condenses into a liquid, and moves to the evaporator 30 again to carry out the same heat transfer. repeat. Therefore, even if there is snowfall in the winter when the temperature drops, the snow falling on the road surface 20 is immediately melted by the heat from the heat pipe 3 applied to the pavement material 21 and becomes water and flows into the gutter 1. At the same time, the subsequent freezing of the road surface 20 is prevented. In this case, since the condenser portion 31 side is located above the evaporator portion 30 side of the heat pipe 3 and the condenser portion 31 is gradually inclined upward toward the central portion of the road surface 20, the liquid working fluid in the heat pipe 3 is Can be easily returned from the condensation section 31 side to the evaporation section 30 side by the force of gravity, and heat transfer from the evaporation section 30 side to the condensation section 31 side can be performed quickly and in large quantities.

Further, the road 2 of each heat pipe 3 buried under the road surface 20 in accordance with the temperature of the hot spring water H in the gutter 1.
Since the longitudinal pitch P of the heat pipe 3 is changed, the amount of heat radiated from the heat pipe 3 can be made uniform over the longitudinal direction of the road 2, and the excess or deficiency of heat radiated to the pavement material 21 can be eliminated, and It enables uniform snow melting and freeze prevention. it can. Further, since the mortar 4 is cast on the bottom of the side groove 1 in which the evaporation portion 30 of the heat pipe 3 is arranged so that the heat pipe 3 cannot be seen from the outside from the outside, the heat pipe 3 inside the side groove 1 is not exposed. It is possible to prevent foreign matter from adhering and to easily clean the inside of the side groove 1.

On the other hand, in this heat pipe type snow melting apparatus, since the corrugated pipe which is easily bent is used as the closed pipe for the heat pipe 3, the heat pipe 3 can be bent without being bent in the factory. Has the advantage that it can be bent and positioned on-site, which facilitates on-site construction and allows the heat pipe 3 to be laid according to the situation at the site. In addition, in this heat pipe type snow melting apparatus, the evaporation portion 30 of the heat pipe 3 disposed in the ditch 1 is covered with the polyethylene coating 40, so that the hot spring water H is generated between the cracks of the mortar 4 in the ditch 1 and the like. Even if the heat pipe 3 is infiltrated and touches it, this heat pipe 3
Is not corroded by the hot spring water H (for example, acid corrosion) and can maintain a stable heat transport operation for a long period of time. Further, by covering the lower side of the condensing portion 31 of the heat pipe 3 with a heat insulating material to prevent the heat from being released to the side of the paving material 21 below, the heat from the heat pipe 3 can be more effectively prevented from melting snow and freezing on the road surface 20. Can be used for

As described above, in this embodiment, since the evaporation portion 30 of the heat pipe 3 disposed at the bottom of the side groove 1 is covered with the mortar, foreign matter is caught on the heat pipe 3 in the side groove 1. It is possible to ensure smooth circulation of hot water.

In the above embodiment, the case where the hot spring water H is used as the heat source water has been described. However, hot water such as hot spring waste water or factory wastewater can be used as the heat source water.

[0019]

As is clear from the above description, according to the heat pipe type road snow melting device of the present invention, the heat of the hot water flowing through the gutter is pumped up by the heat pipe, and the heat is used as a heat source to prevent snow melting and freezing on the road. Therefore, the maintenance of the equipment does not require manpower and the running cost is unnecessary. Further, since it is not necessary to pass hot spring water through the pipe, there is no possibility that the pipe will be clogged or corroded.

[Brief description of drawings]

FIG. 1 is a sectional side view showing a first embodiment of the present invention.

FIG. 2 is a plan view of the same.

[Explanation of symbols]

1 ... Gutter, 2 ... Road, 3 ... Heat pipe, 20 ...
Road surface, 30 ... Evaporating part, 31 ... Condensing part, H ... Hot spring water.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koichi Masuko 1-5-1, Kiba, Koto-ku, Tokyo Fujikura Electric Wire Co., Ltd. (72) Inventor Masahiko Ito 1-5-1, Kiba, Koto-ku, Tokyo Fujikura Electric Wire Co., Ltd. (72) Inventor Yuuji Saito 1-5-1, Kiba, Koto-ku, Tokyo Fujikura Electric Line Co., Ltd.

Claims (1)

[Claims] 1. Evaporating parts on one end side of a plurality of heat pipes are respectively arranged in gutters on the road shoulder where hot water flows, and condensing parts on the other end side of these heat pipes are provided on the road. A heat pipe type road snow melting device, which is arranged immediately below the road surface.