JP3113014B2 - Road heating system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for burying one or more pipes under a road surface and circulating a heating medium such as hot water or antifreeze through the pipes to heat the road surface, thereby making it possible to snow or freeze snow. The present invention relates to a road heating system that prevents such problems.

[0002]

2. Description of the Related Art Recently, on roads in cold regions,
One or more pipes are buried under the road surface to prevent or melt snow and freezing on the road surface, and a heat medium such as hot water or antifreeze is circulated through the pipes. Adoption of a warm road heating system is being carried out.

In the road heating system, for example, as shown in FIG. 3A, one pipe 2 is arranged in a meandering manner below a road surface of a road 1, and one end of the pipe 2 is heated. The other end of the medium feed pipe 3 is connected to the heat medium return pipe 4 or, as shown in FIG. 3B, a large number of pipes 2. Is connected to the heat medium return pipe 3, and the other end is connected to the heat medium return pipe 4.

[0004] Then, as shown in FIG. 4, the heat medium supply pipe 3 communicates with the supply side of the heat medium supply device 5, and the heat medium return pipe 4 communicates with the reception side of the heat medium supply device 5. The road surface is heated by circulating the heat medium.

[0005] The heat medium supply device 5 usually includes a hot water boiler 6 and a liquid feed pump 7, forcibly circulates a heat medium such as heated water or antifreeze with a pump, heats the road surface, and heats the road surface. It prevents snow and freezing, and melts snow and freezing.

In a conventional road heating system, a road area to be heated (a road area where pipes are disposed; hereinafter, referred to as a heating area) is heated as uniformly and effectively as possible, and a pipe pipe is heated. In order to simplify the process, pipes were evenly arranged only under the road surface in the heating area, and attention was paid exclusively to snow accumulation and prevention of freezing on the road surface in the heating area.

However, in the system described above,
The heated area and the non-heated area are clearly distinguished. In other words, roads are infinitely long, and it is financially difficult to make a certain road a road-heating road over its entire length. Therefore, only a certain section of a certain road must be used as a road-heating road. However, in the system described above, the heating area A and the non-heating area B are clearly separated as shown in FIG.

Therefore, in a snowy area, even if the road is the same, the heating area A has no snow cover,
Immediately after the end of the road, a snow cover C of several tens of centimeters is formed in the non-heated area B, so to speak, a wall is formed by a snow layer in the width direction of the road, and a large step is generated. Was caused.

The applicant has filed a patent application for a "road heating system" in Japanese Patent Application No. 3-218076 in order to solve the above-mentioned problems. This is because the flow rate of the heat medium at the end portion of the heating section A in the road length direction in the road length direction is smaller than the flow rate of the heating section A in the other portion, and the non-heating section B of the heating section A is not heated. At the boundary with the snow, the snow gradually deepens.

However, the load heating system of the above-mentioned patent application reduces the flow of the heat medium,
Since the piping of the pipe at the end of the heating zone is configured differently from the piping in other parts, there is a problem that the piping work at the construction site is complicated and it is difficult to standardize the piping work.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a heating area on a road surface of a non-heating area in a predetermined range adjacent to the end of the heating area. The heating effect of the circulating heat medium is increased to some extent, so that the boundary between the heating area and the non-heating area does not have a large step due to the snow layer as described above, so to say, at the boundary part, so to speak. It is an object of the present invention to provide a road heating system capable of deepening snow cover.

[0012]

In order to achieve the above object, the present invention provides a road heating system in which a pipe is buried under a road surface in a heating area of a road, and a heating medium is circulated through the pipe to heat the road surface. In a heating system, a heat conductive member can be heated by a heat medium flowing in the heating area under a road surface of a predetermined range of a non-heating area adjacent to an end portion of the heating area in a road length direction. It was buried in.

[0013]

[Function] When a heat medium is supplied to a pipe from a heat medium supply source, the heat medium flows through the pipe and heats the road surface in a heating area to prevent snow and freezing on the road surface and to prevent snow and freezing. Thaw. Since a heat conductive member is disposed in a predetermined range of the non-heating area adjacent to the end of the heating area so as to be heated by the heat medium, the road surface adjacent to the heating area of the non-heating area Is heated by the heated heat conductive member, and as a result, there is no large step due to snow at the boundary between the heated area and the non-heated area. The snow gradually becomes deeper.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, reference numeral 11 denotes a road having a road surface 12 on which concrete or asphalt is paved. A number of pipes 13 are buried in the length direction.

The pipe 13 is made of, for example, a synthetic resin pipe such as a nylon pipe or a metal pipe having a pressure resistance and a corrosion resistance for flowing a heat medium. And at the same time as the pavement work of the road surface 12,
It is buried 3 to 30 cm below the road surface.

A plurality of pipes 13 disposed on the road 11 are located at both ends of the road under the road surface.
5 are buried. One end on the same side of each of the pipes 13 is alternately connected to the outgoing header 14 and return header 15 alternately, and the other end on the opposite side is alternately alternately returned header 15 alternately. , To the outgoing header 14.

Both ends of the pipes 13, that is, the outgoing header 14 and the return header 15 are located at the end 16 of the heating area A (boundary portion with the non-heating area B). Then, the heat conductive member 17 protrudes from the end portion 16 toward a non-heating area B adjacent thereto over a predetermined section in the longitudinal direction of the road, and is buried under the road surface of the non-heating area. I have.

The heat conductive member 17 is made of a material having good heat conductivity such as iron and stone, and is formed in a rod shape, a plate shape or a mesh shape. And this heat conductive member 1
7, that is, the heating area A side is the pipe 1
3 or in close contact with the outgoing header 14 and the return header 15 with a metal wire or other suitable tying member 18 so as to be heated by a heat medium.

Therefore, the heat conductive member 17 is heated by the heat medium, and the road surface 12 of the road 11 in a predetermined range of the non-heating area B adjacent to the end portion 16 of the heating area A is heated below the road surface. The heated heat conductive member 17 heats the member.

The return header 15 is connected through a heat medium return pipe 19 to a population 21 of a boiler 20 as a heat medium supply source. The going header 14 is connected to a discharge port 24 of a pump 23 via a heat medium going pipe 22, and a suction port 25 of the pump 23 is connected to a boiler 20.
Outlet 26.

Therefore, when the pump 23 is driven, a heat medium such as hot water is sucked from the boiler 20 and
The heat medium is supplied to the heat medium outgoing pipe 22 from 4, and the heat medium flows through a large number of pipes 13...

In this case, since many pipes 13 are arranged in parallel with each other, and one end on the same side is alternately connected to the outgoing header 14 and the return header 15 alternately. The flow direction of the heat medium flowing through the adjacent pipes 13 is alternately reversed, and the road surface 12 of the heating area A is
As a result, it is possible to reliably prevent snow and freezing on the road surface 12 and to melt snow and freezing on the road surface 12 on the road 11 in a cold region.

On the other hand, since the heat conductive member 17 is buried in the non-warming section B adjacent to the end portion 16 of the heating section A so as to be heatable by the heat medium, the heat conductive member 17 is buried. The road surface 12 in the non-heated area is also heated to some extent, though not as much as the road surface in the heated area A. Therefore, the terminal 1
The road surface 12 of the non-heated area B adjacent to 6 is also slightly melted although insufficient, and the boundary between the heated area A and the non-heated area B has a gentle temperature distribution and the snow C gradually deepens, C does not cause a large step.

[0024]

As described above, according to the present invention, a pipe for circulating the heat medium is buried under the surface of the heating area of the road, and the pipe is adjacent to the end of the heating area in the direction of the length of the road. A heat conductive member heated by the heat medium is buried in the non-heated area to be heated, and the heat conductive member heats the adjacent non-heated area. The boundary portion of the non-heated area has a gentle temperature distribution. Therefore, it is possible to prevent the formation of a snow layer wall at the boundary between the heating area and the non-heating area without changing the piping configuration of the pipe itself in the heating area depending on the location, and to prevent the vehicle from moving from the heating area to the non-heating area. There is an effect that the behavior when moving to the heating area becomes smooth, and occurrence of slip, rollover accident, and the like can be prevented beforehand.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a road heating system showing an embodiment of the present invention.

FIG. 2 is a vertical sectional side view of a main part of the embodiment.

FIG. 3 is a configuration diagram of a conventional road heating system.

FIG. 4 is an overall configuration diagram of a conventional road heating system.

FIG. 5 is a vertical sectional side view of a part of a conventional road heating system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Road 12 Road surface 13 Pipe 16 Termination part 17 Heat conductive member A Heating area B Non-heating area

Claims (1)

(57) [Claims] 1. One or two under the surface of the heating area of the road
In a road heating system in which more than one pipe is buried and a heat medium is circulated through these pipes to heat a road surface, a predetermined range of a non-heated area adjacent to an end portion of the heated area in the direction of the road length is used. A road heating system, wherein a heat conductive member is buried under a road surface so as to be heated by the heat medium.