JPH0724402Y2 - Road snow melting device using tap water heat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a device for melting snow accumulated on a road surface by a heat pipe using tap water as a heat source.

As a road surface snow melting device that melts snow on the road and secures safe traffic, for example, a method of pumping hot spring water or relatively warm groundwater and directly spraying it on the snow covered road surface to melt snow, A method of pumping geothermal heat with a heat pipe to warm the road surface to melt the snow, or an electric heater is buried directly under the road surface, and when the snowfall occurs, the electric heater is switched on to warm the road surface A wide variety of methods have been taken to prevent this.

However, among the above-mentioned snow melting methods for road surfaces, the method of pumping groundwater or hot spring water from the underground and spraying it on the road has disadvantages such as causing ground subsidence. There is a drawback that you can only use the hot springs in certain areas with hot springs.

In addition, in the method of pumping ground heat with a heat pipe to melt snow on the road surface, in order to obtain sufficient heat to melt snow,
Except for areas with particularly high geothermal heat such as hot springs, it is generally necessary to place the evaporation part of the heat pipe deep underground, a long heat pipe is required, and large-scale installation work is required. Then, there was a problem that the equipment cost became high.

Furthermore, the method of burying an electric heater directly under the road surface to perform snow melting has a problem that a large amount of electric power is consumed and the running cost becomes high because maintenance and inspection of the equipment are required.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an economically excellent apparatus for melting snow on a road surface by pumping the heat of a water pipe that can be used as a heat source in any region with a heat pipe. Has an aim.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention proposes an evaporation part of a heat pipe in which a condensing part is buried substantially horizontally just below a road surface.
It is characterized in that it is arranged close to the outer circumference of a water pipe buried in the ground, and that the gap between the water pipe and the evaporation portion of the heat pipe is filled with a filler having a high thermal conductivity.

Further, the evaporation part of the heat pipe in which the condensing part is buried almost horizontally just below the road surface is formed into a hollow body having an arc-shaped cross section, and the evaporation part is arranged close to the outer periphery of the water pipe buried in the ground. It is characterized by that.

Further, the evaporating portion of the heat pipe may be arranged on the outer periphery of the water pipe so that it has a forward slope, and the water pipe and the evaporating portion of the heat pipe may be integrally covered with concrete. .

The tap water flowing through the water supply mains, etc., which are buried in a relatively shallow area in the ground, is 10 ° C even in winter.
Since the water temperature before and after is maintained, it can be used as a relatively stable heat source. In this device, the heat of the tap water is efficiently transferred by the heat pipe to just below the road surface, and the heat melts the snow on the road.

To this end, the evaporating section of the heat pipe in which the condensing section is buried substantially horizontally just below the road surface is arranged close to the outer periphery of the water pipe buried in the ground, and the evaporating section of the water pipe and the heat pipe is Since the gap is filled with the filler having high thermal conductivity, the heat transfer is efficiently performed between the water pipe and the evaporation portion of the heat pipe.

If the evaporating part of the heat pipe is formed as a hollow body having an arcuate cross section along the outer circumference of the water pipe, the heat receiving area of the evaporating part is increased, the heat transfer amount is increased, and the snow melting capability is improved. If the part is formed in the shape of a half-sleeve, the construction is facilitated, and the heat receiving area is significantly increased to further improve the snow melting capability.

Further, if the evaporation part of the heat pipe is arranged on the outer periphery of the water pipe so as to have a forward gradient, and the outside of this water pipe and the evaporation part of the heat pipe is integrally covered with concrete, A plurality of heat pipes can be easily fixed to the outer periphery, and the gap between the water pipe and the evaporation portion is filled to maintain high heat transfer efficiency, and the workability is greatly improved.

In addition, the heat storage effect of concrete averages the heat transport capacity of each heat pipe, prevents the occurrence of snow melting unevenness, and compensates for fluctuations in the snow melting capacity due to daily changes in tap water flow rate, etc. Averaged.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

1 and 2 show a first embodiment of the present invention, in which a heat pipe type snow melting device 1 is provided on the outer periphery of a water pipe 2 buried in a relatively shallow portion of the road portion in the ground. The evaporation part 3a is composed of a pair of heat pipes 3, 3 each having a condensing part 3b directly below the road surface S of the pavement P.

The evaporating portion 3a of the one heat pipe 3 (on the left side in FIG. 1) that constitutes this road surface snow melting device 1 is an arc-shaped hollow body having a cross-sectional shape of 180 ° in circumferential angle, and is outside the water pipe 2. It has an inner diameter slightly larger than the diameter, and its length is formed in the shape of a half sleeve which is shorter than the distance between the connection flanges 2a, 2a of the water pipe 2. The evaporation part 3a of the other heat pipe 3 is also formed in a half sleeve shape, and both evaporation parts
3a, 3a are arranged so as to sandwich the outer circumference of the water pipe 2 from both sides, and flanges 3c, 3c that abut against each other at the upper and lower two places are fastened with bolts and nuts, and are attached to the outer circumference of the water pipe 2. Has been done. In addition, inside the evaporation parts 3a, 3a mounted so as to wrap the outer circumference of the water pipe 2,
A heat transfer cement 4 is filled between the water pipe 2 and the outer peripheral surface of the water pipe 2 so that no void is formed.

Further, four pipes are attached to the upper portion of each half sleeve-shaped evaporation portion 3a so as to communicate with the inside of the evaporation portion 3a, and the upper portions of the respective pipes are arranged in the installation direction of the water pipe 2. In a direction almost perpendicular to and the flange 3c of the evaporator 3a
The condensing part 3b of the heat pipe 3 is formed by bending away from the condensing part 3b. The condensing parts 3b are arranged substantially horizontally in the pavement P of the road and share the half sleeve sleeve evaporation part 3a. It is formed like four heat pipes. Then, the condensable hydraulic fluid L is sealed in the heat pipe 3, and the tap water W flows in the water pipe 2.

Next, the operation of this embodiment configured as described above will be described.

The tap water flowing through the water pipe 2 is 10 even in winter.
The water temperature around ℃ is maintained. Therefore, the evaporator 3a arranged on the outer periphery of the water pipe 2 is heated by the heat of the tap water W via the water pipe 2. At this time, since cement 4 having a high thermal conductivity is filled between the water pipe 2 and the evaporation portion 3a of the heat pipe 3 so that there is no gap, heat is not generated between the water pipe 2 and the evaporation portion 3a. Communication is performed efficiently.

Further, since the evaporation portion 3a is formed in the shape of a half sleeve, the heat receiving area of the evaporation portion 3a that receives heat from the water pipe 2 can be widened, and the heat of the tap water W can be efficiently received.

When the evaporator 3a is heated, the liquid-phase working liquid L stored in the evaporator 3a evaporates and rises in the evaporator 3a to 4
They flow into the respective pipes and instantly move to the low-pressure condenser section 3b. The vapor of the hydraulic fluid L that has moved to the condenser 3b is deprived of heat, condenses and returns to the liquid-phase hydraulic fluid L. At this time, the vapor of the hydraulic fluid L releases the heat carried as the latent heat of vaporization, and the heat raises the temperature of the pavement P so that the road surface S
Thaw the snow cover above. In addition, since the condensing part 3b is arranged almost horizontally just below the road surface S, it is possible to melt a wide range of snow on the road surface S.

Further, FIG. 3 shows a second embodiment of the present invention, in which a heat pipe type snow melting device 11 has an evaporation portion on the outer periphery of a water pipe 12 buried in a relatively shallow portion of the ground of a road portion. 13
a is composed of seven heat pipes 13 each having a condensing portion 13b disposed immediately below the road surface S of the pavement P.

The evaporation section 13a of each heat pipe 13 constituting the road snow melting device 11, along with the outer periphery of the water pipe 12 in a forward gradient, in a state where this evaporation unit 13a along the outer periphery of the water pipe 12 Concrete is poured to form a concrete coating 14 with a substantially square cross section on the outer periphery of the water pipe 12, and each evaporation part 13
Fix a. In addition, the heat storage material 1
4a is mixed.

The condensing portion 13b side of each heat pipe 13 extends in a direction substantially perpendicular to the installation direction of the water pipe 12, and each condensing portion 13b is arranged substantially horizontally in the pavement P of the road. Has been done. In addition, tap water W is distributed in the water pipe 12.

Next, the operation of this embodiment configured as described above will be described.

When the evaporation portion 13a arranged on the outer periphery of the water pipe 12 is heated by the heat of the tap water W flowing in the water pipe 12, the water pipe 12 and the evaporation portion 13a of the heat pipe 13 have heat conductivity. Since it is integrally formed with the excellent concrete coating 14, the evaporation portion 13a of each heat pipe 13 is heated and the concrete coating 14 is also heated. Therefore, the respective evaporation portions 13a of the seven heat pipes 13 are uniformly heated by the action of the concrete coating 14.

Then, the liquid-phase working liquid L stored in each heated evaporation portion 13a evaporates, rises in the evaporation portion 3a, and instantaneously moves to the low-pressure condensation portion 13b. The vapor of the hydraulic fluid L that has moved to the condenser 13b is deprived of heat and condensed to return to the liquid-phase hydraulic fluid L. At this time, the vapor of the hydraulic fluid L releases the heat carried as the latent heat of vaporization, and the heat raises the temperature of the pavement P to melt the snow on the road surface S.

Further, since the concrete coating 14 is mixed with the heat storage material 14a, when excess heat is generated from the tap water W, the excess heat is accumulated in the heat storage material 14a, and the flow rate of the tap water is increased. When the amount of heat received from the water pipe 12 is small, as in the case of an extremely small amount, snow melting is performed using the heat accumulated in the concrete coating 14a.

As described above, according to the apparatus of the present embodiment, the water pipe 12 and the evaporation portions 13a of the plurality of heat pipes 13 arranged along the outer periphery of the water pipe 12 are integrated with the concrete coating 14a. Since it is fixed, the construction is easy, and each heat pipe 13 can be heated uniformly, which has the effect of preventing the occurrence of snow melting unevenness.

Further, since the concrete coating 14 serves as a heat storage body and can store the excess heat, it is possible to cover the decrease in the amount of heat received when the flow rate of the tap water is significantly reduced, and to prevent the snow melting capacity from decreasing.

Effect of the Invention As described above, the road surface snow melting device of the present invention, which utilizes tap water heat, has the evaporation part of the heat pipe in which the condensing part is buried almost horizontally just below the road surface. Since it is placed close to the outer periphery and the gap between the water pipe and the evaporation section of the heat pipe is filled with a filler having a high thermal conductivity, a relatively short heat pipe is used and the structure is It is simple and maintenance-free, and because it does not use a heat source such as an electric heater, it does not require running costs and is economical.

Further, if the evaporating portion of the heat pipe is formed as a hollow body having an arcuate cross section along the outer circumference of the water pipe, the heat receiving area of the evaporating portion can be increased and the heat transport amount can be increased. In addition, this evaporation unit,
If it is formed in the shape of a half sleeve along the outer circumference of the water pipe, the construction will be easy and the heat receiving area can be greatly increased.
The snow melting ability can be further improved.

In addition, if the evaporation part of the heat pipe is arranged close to the outer circumference of the water pipe so as to form a forward slope, and if this water pipe and the evaporation part of the heat pipe are integrally covered with concrete, the outer circumference of the water pipe The heat pipe can be easily fixed to the heat pipe, the gap between the water pipe and the evaporation portion can be filled, high heat conductivity can be maintained, and the workability can be greatly improved. In addition, the heat storage effect of concrete averages the heat transport capacity of each heat pipe, can prevent the occurrence of snow melting unevenness, and compensates for fluctuations in the snow melting capacity that accompany daily changes in tap water flow rate. , Snow melting ability can be averaged.

[Brief description of drawings]

1 and 2 show a first embodiment of the present invention. FIG. 1 is a sectional front view showing a road surface snow melting device, FIG. 2 is a perspective view of the road surface snow melting device, and FIG. It is a cross-sectional front view of the road surface snow melting apparatus of the embodiment. 1,11 …… Road surface snow melting device, 2,12 …… Water pipe, 3,13 …… Heat pipe, 3a, 13a …… Evaporation section, 3b, 13b …… Condensing section, 4…
… Heat transfer cement, 14… Concrete coating, 14a… Heat storage material, S… Road surface, P… Pavement, W… Tap water.

Claims (5)

[Scope of utility model registration request] 1. An evaporating portion of a heat pipe in which a condensing portion is buried substantially horizontally just below a road surface is arranged near an outer periphery of a water pipe buried in the ground, and the evaporating portion of the water pipe and the heat pipe is A road snow melting device using tap water heat, characterized in that the gap of is filled with a filler having a high thermal conductivity. 2. An evaporating portion of a heat pipe in which a condensing portion is buried substantially horizontally just below a road surface is formed into a hollow body having an arcuate cross section, and the evaporating portion is arranged close to the outer periphery of a water pipe buried in the ground. A road surface snow melting device that utilizes tap water heat. 3. The tap water heat of claim 2, wherein the evaporation portion of the heat pipe is formed in a half sleeve shape having a span between joint flanges of a water pipe as one span. Road snow melting device. 4. The evaporation part of the heat pipe is arranged on the outer periphery of the water pipe so that the inclination is a forward slope, and the water pipe and the evaporation part of the heat pipe are integrally covered with concrete. The road surface snow melting apparatus using tap water heat according to claim 1. 5. The road surface snow melting apparatus using tap water heat according to claim 4, wherein a heat storage material is embedded in the concrete.