JPH06193008A - Snow thawing facilities - Google Patents

Abstract

PURPOSE:To fulfill an effect of uniformly thawing the snow, further facilitate running control and reduce running cost by radiating heat uniformly from the whole pavement body. CONSTITUTION:In non-sprinkling snow thawing facilities for melting the snow on the surface of a pavement body 11 by radiating heat of warm water passing in radiating pipes 12, 13 embedded in the pavement body, at least a pair of and respective radiating pipes 12, 13 embedded in the pavement body 11 are embedded under the bent-state approximately parallel to each other. Warm water is adapted to flow in at least a pair of radiating pipes 12, 13 in the opposite direction to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow erasing facility applied to roads and the like in cold and snowy areas.

[0002]

2. Description of the Related Art For example, in an area where a large amount of snowfall occurs during the winter, there is a need for a means for satisfactorily removing snow accumulated on the road surface. Conventionally, the most widely used means of this kind is to supply hot water into a heat dissipation pipe buried under the road surface, and radiate the hot water passing through the heat dissipation pipe to melt snow on the road surface so-called non-sprinkling water. There is a snow melting facility.

As the above-mentioned non-sprinkling snow melting facility, for example, FIG.
Is known, which is disclosed in Japanese Examined Patent Publication No. 4-4560.
6 is disclosed. In this figure, reference numeral 1 is the ground, and an underground boiler 3 is provided in a heat insulation box 2 installed in the ground 1. By heating the underground boiler 3, a constant high temperature is stored in a tank 4. The hot water is stored, and the heat is always stored so as to maintain this constant high temperature. A heat dissipation pipe 6 is embedded in the pavement 5 provided on the ground 1, and a circulation pump 7 connected to the heat dissipation pipe 6 operates to send hot water in the tank 4 to the heat dissipation pipe 6. To be As a result, heat energy is transferred from the heat radiating pipe 6 to the pavement 5, and the snow on the surface of the pavement 5 is melted. It is well known that at present, such a non-sprinkling snow melting facility is widely used by appropriately providing it on slopes, sidewalks at intersections, runways at airports, etc.

By the way, the radiating pipe 6 used in the above-mentioned non-sprinkling snow melting facility is usually a single pipe body made of thin-walled stainless steel or the like, and the radiating pipe 6 depends on the thickness of the pavement 5.
It is buried so as to meander in the entire pavement body 5 at a depth of 4 to 15 cm from the axis of the pavement body to the upper end of the pavement body 5. Then, the hot water is introduced from the hot water inlet side (one end portion) 6a of the radiating pipe 6 and the hot water is caused to flow out from the hot water outlet side (other end portion) 6b, that is, the hot water is circulated in only one direction.

[0005]

However, the radiation pipe 6 having the above-mentioned structure has the following problems. That is, since the hot water has a temperature drop from the hot water inlet side 6a to the hot water outlet side 6b, even if high heat energy can be transferred to the pavement 5 at the hot water inlet side 6a,
Only low heat energy can be transferred to the pavement 5 on the hot water outlet side 6b. As a result, the amount of heat radiation and the amount of heat storage of the entire pavement 5 become non-uniform, and the operation management of the circulation pump 7 becomes difficult. Further, in order to be able to supply high thermal energy also on the hot water outlet side 6b, it is necessary to raise the hot water temperature, and accordingly, the heat radiation loss on the hot water inlet side 6a becomes large, which promotes operating costs. Will end up.

The present invention has been made in view of the above circumstances, and it is possible to obtain a uniform snow melting effect by uniformly radiating heat to the entire pavement, further facilitating operation management and reducing operating costs. The purpose is to provide a snow melting facility that can be made inexpensive.

[0007]

The snow melting facility of the present invention is a non-sprinkling snow melting facility that melts snow on the surface of a pavement by radiating hot water that passes through a heat radiation pipe buried under the pavement. The heat radiation pipes embedded under the pavement are embedded in a state in which at least one pair and the respective heat radiation pipes are bent substantially parallel to each other, and hot water flows in opposite directions in the at least one pair of heat radiation pipes. Is characterized by.

[0008]

According to the heat radiating pipe in the non-sprinkling snow melting facility of the present invention, at least a pair of, for example, two radiating pipes are buried under the pavement in a state where they are bent substantially parallel to each other. By supplying hot water into the pipe, heat energy is transferred to the pavement body to melt the snow on the pavement body. In this case, by supplying hot water to the heat radiating pipes in opposite directions, the arithmetic mean of the amount of heat radiated from the hot water becomes constant at the hot water inlet side and the hot water outlet side of the pair of heat radiating pipes, and the pavement as a whole has a uniform So that it can melt snow.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a diagram showing an embodiment of a non-sprinkling snow melting facility to which the present invention is applied. In this figure, reference numeral 10 is the ground, and 11 is a material laid on the ground 10 and having a high heat transfer and heat storage effect. The pavement bodies 12 and 13 are heat radiation pipes embedded inside the pavement body 11.

The heat radiating pipes 12 and 13 are made of thin-walled stainless steel or the like, and depending on the thickness of the pavement 11, the heat radiating pipes 12 and 1 can be made.
It is buried at a depth of 4 to 15 cm from the axis of 3 to the upper end of the pavement 11. The two heat radiating pipes 12 and 13 are arranged substantially parallel to each other and separated from each other by a predetermined distance, and are bent so as to meander the entire pavement 11.
Bending tubes 21, 22, ... Having different bending radii are used for the respective bending portions of the heat radiating tubes 12, 13.

The hot water inlet side 12 of the radiating pipes 12 and 13
A hot water feed pipe 14 and a hot water return pipe 15 which are buried linearly in the pavement 11 are connected to a and 13a and the hot water outlet sides 12b and 13b. A pipe 16 is connected to the hot water feed pipe 14, and one end 16 a of the pipe 16 is connected.
Is connected to a circulation pump 18 arranged in the water storage tank 17. On the other hand, a pipe line 19 is connected to the warm water return pipe 15, and one end portion 19 a of the pipe line 19 is directly connected to the water storage tank 17.

Next, the operation of the non-sprinkling snow melting facility having the above structure will be described. First, hot water having an appropriate temperature for snow melting (about 11 to 25 degrees Celsius) is stored in the water storage tank 1.
The water is stored in 7 and, in this state, the circulation pump 18 is operated during snowfall. The circulation pump 18 supplies the hot water stored in the water storage tank 17 into the hot water feed pipe 14. The hot water passes from the hot water feed pipe 14 through the hot water inlet sides 12a and 13a of the heat radiating pipes 12 and 13, respectively, and the radiating pipe 1
Circulate 2 and 13 as a whole. After that, the hot water flowing into the hot water return pipe 15 is stored again in the water storage tank 17.

In the above non-sprinkling snow melting facility, the hot water flows through the heat radiating pipe 12 and the heat radiating pipe 13 in directions opposite to each other. The high heat energy of the hot water that just flowed in supplements the low heat energy that has finished flowing through the heat dissipation pipe 13. Further, in the portion indicated by the arrow B, the heat energy transfer relationship is reversed, and the portions indicated by the arrow C have the same amount of heat energy.

Therefore, the amount of heat radiated from the heat radiating pipes 12 and 13 to the pavement 11 has a constant arithmetic mean of the heat energy of the hot water in any of the portions. As a result, it is possible to uniformly dissipate heat to the entire pavement 11, and thus it is possible to obtain a uniform snow melting effect. Further, since it is not necessary to replenish the heat energy, the operation management can be facilitated, and the heat loss can be reduced, so that the operation cost can be reduced.

[0015]

As is clear from the above description, according to the snow melting facility of the present invention, the arithmetic mean of the heat amounts of the one heat radiating pipe and the heat radiating pipe of the other can be calculated at any portion near the heat radiating pipe. It can be made substantially constant, so that a uniform snow melting effect can be obtained on the pavement. Furthermore, since there is no low-temperature portion that requires special replenishment of heat energy, operation management is easy and the operation cost can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a snow removal facility shown as an embodiment of the present invention.

FIG. 2 is a sectional view showing an example of a conventional non-sprinkling snow melting facility.

[Explanation of symbols]

 11 Pavement 12, 13 Radiating pipe 12a, 13a Hot water inlet side (of radiating pipe) 12b, 13b Hot water outlet side (of radiating pipe) 21, 22, ... Bending pipe

Claims (1)

[Claims] 1. In a non-sprinkling snow melting facility that melts snow on the surface of the pavement by radiating hot water that passes through the heat radiating pipe buried under the pavement, the radiant pipe buried under the pavement comprises: A snow-melting facility, wherein at least one pair is buried in a state in which they are bent substantially parallel to each other, and hot water flows in opposite directions in the at least one pair of heat radiation pipes.