JPS63107601A - Road heating apparatus - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a road heating device for preventing ice from forming on a road surface or melting snow in cold regions.

(Prior art) In order to prevent road surfaces from freezing and melt ice and snow in cold regions, there are methods such as installing sprinklers along the road and sprinkling water on the road surface, spraying lucium chloride, or In hot spring areas, hot spring piping is constructed under the road surface to utilize hot spring heat.

However, the cost of installing sprinklers increases, and the nozzles are easily clogged with dirt and debris, which increases the water pressure and causes water to spout from unclogged nozzles, which can be dangerous for pedestrians. It may cause trouble. In addition, spraying rhusium chloride is complicated, requires a lot of labor, and costs a lot of money.Although hot spring piping can solve the above-mentioned problems to some extent, it cannot be used outside of hot spring areas. There is a situation.

Recently, hot water pipe snow melting methods have been introduced in some areas, where hot water pipes are installed under the road surface and hot water from a hot water boiler is circulated through the hot water pipes to radiate heat to prevent ice from forming on the road surface and melt snow. is being attempted. As shown in Figure 9 (A), two pipes a and b are drawn parallel to each other and bent many times in a large zigzag shape, and one end of each pipe a and b is connected to the hot water supply. The other end of the pipe C can be connected to the hot water return 'ld to circulate the hot water as shown by the arrow, or one pipe e can be folded repeatedly in the same way as shown in Figure (B). One end of the pipe C is connected to a hot water outgoing pipe C, and the other end is connected to a hot water connecting pipe d, so that hot water is circulated in the direction shown by the arrow.

However, in both cases, one or two pipes are installed under the road surface in a large meandering manner.
The purpose is to heat the entire wide road, and the passage length that can be covered is short compared to the length of the pipe, and if the pipe is made longer, the temperature of the hot water will drop at the end of the hot water distribution direction. However, there is a disadvantage that the road surface cannot be heated over a long distance. Furthermore, if a long pipe is used, even if a part of the pipe becomes damaged or has a pinhole,
There is a problem in that it is difficult to find the affected area and a lot of effort is required for repair work.

Therefore, the applicant has developed a road heating device that solves the above-mentioned problems, and has already filed a patent application in 1988-1989.
It has been filed as No. 643. In this application, a large number of pipes are arranged substantially in parallel, and one end of each pipe is connected to an inlet header arranged perpendicularly thereto, and the other end is connected to an outlet header, and The inlet header is connected to the supply side of the heat medium generation source, and the heat medium is circulated through each pipe to heat the road surface, prevent ice formation, and melt snow. According to this road heating device, the above-mentioned conventional drawbacks are solved, but since a large number of pipes are arranged almost in parallel, when the pipes are installed in the length direction of the road, the pipes overlap each other. If the gap between pipes is widened, snow and ice will not melt between the pipes, and there is a risk that snow and ice will remain on the road surface in bands along the length of the road, impairing vehicle drivability. Furthermore, if the pipes are arranged in the width direction of the road, a problem arises in that a large number of short pipes are required, and a large number of inlet-side headers and exit-side headers need to be arranged in series on both sides of the road.

(Problems to be Solved by the Invention) As mentioned above, although the road heating device of Japanese Patent Application No. 19643/1988 can solve the conventional problems,
There is a problem in that snow and ice cannot be melted uniformly on the road surface, and the number of pipes per unit area increases, making construction more complicated and increasing costs.

This invention was made with attention to the above-mentioned circumstances, and its purpose is to melt snow and ice uniformly on the road surface,
To provide a road heating device that improves the running performance of a vehicle, can reduce the number of pipes per unit area, is easy to install, and can reduce varnish.

[Structure of the invention]

(Means and effects for solving the problem) This invention has the following features:
A large number of pipes bent in a wave shape are arranged in parallel under the road surface, and one end of each pipe is connected to an inlet header arranged in a direction almost perpendicular to this, and the other end is also connected orthogonally to the pipe. Piping units 1 to 5 are constructed by communicating with outlet headers disposed in the direction of the piping, and the inlet headers of the piping units are connected to the supply side of the heat medium supply source to allow the heat medium to flow through each of the pipes.

The idea is that even if the distance between the pipes is widened, the entire road surface can be heated evenly.

(Example) Embodiments of the present invention will be described below based on the drawings.

1 to 4 show a first embodiment, in which 1 is a road surface paved with concrete or asphalt,
At the bottom of this road surface 1, a piping unit 2 for circulating a heat medium such as hot water is buried at the same time as the paving work (burying depth is 50 mm).
mm). This piping unit 2 is constructed as shown in FIGS. 2 and 3. That is, 3
... are pipes arranged in parallel in the longitudinal direction of the road surface 1, and on both ends of these pipes 3, an inlet header 4 and an outlet header 5 are arranged in parallel, and each pipe 3
... are disposed in a direction perpendicular to (the width direction of the road surface 1). One end of the pipe 3 is alternately connected to the ladder 4 to the inlet side and to the outlet header 5, and the other end of the pipe 3 is connected to the exit every other time. It is alternately connected to the side header 5 and the ladder 4 to the inlet side.

That is, each pipe 3... has one end connected to the inlet side header 4, the other end connected to the exit side to the ladder 5, and the pipe 3...
The pipes 3 are arranged so that the flow directions of the heat medium flowing through the pipes 3 are opposite to each other in adjacent pipes 3. (In Figure 2, the arrow indicates the direction of flow of the heat medium.)
The inlet header 4 is connected to the outlet of a boiler 7 as a heat medium supply source via a feed pipe 6, and the outlet header 5 is connected to a suction port 10 of a pump 9 via a return pipe 8. . Further, a discharge port 11 of this pump 9 is connected to the inlet of the boiler, and a circulation system path 12 for the heat medium is configured.

Each of the pipes 3 may generally be made of synthetic resin or metal.

In particular, it is preferable to use a flexible synthetic resin pipe or a flexible soft steel pipe, and as shown in FIGS. It is bent. Moreover, pipes 3 adjacent to each other
The peaks 13 and valleys 14 of ... are in phase,
The distance Q between the pipes 3 is substantially the same over the entire length. This pipe 3 may be a wavy pipe that has been bent into a wavy shape in advance and then transported to the construction site and laid. In the case of a flexible synthetic resin pipe or soft steel pipe, a straight pipe may be bent into a wavy shape at the construction site. It may be laid while being bent. and.

As mentioned above, a large number of pipes 3...
After connecting the ends of the piping unit 2 to the rudder 4 on the inlet side and the rudder 5 on the exit side, the piping unit 2 is buried directly under the road surface 1 by ordinary concrete paving or asphalt paving. Therefore, the road is divided into a plurality of sections in the length direction, and the piping units 2 are arranged in each section, and the inlet header 4 of each piping unit 2 is connected to the feed pipe 6.
The heat medium is supplied to each pipe 3 by connecting it to the outlet of the boiler 7 as a heat medium supply source through the pipe 8 and connecting it to the suction port 10 of the pump 9 through the pipe 8 that returns the ladder 5 to the exit side. It can be distributed evenly. For this reason, the heat transfer medium follows the shape of the pipe 3, that is, it moves while meandering in a wave-like manner.Moreover, the direction of movement of the heat transfer medium is opposite in adjacent pipes 3, and the road surface 1 is heated almost uniformly. That will happen. Like this wavy pipe 3...
・By arranging many pipes in parallel, pipes 3 and 3
Even if the interval Q is widened, the snow and ice on the road surface 1 will be cut into pieces, and the snow and ice will not remain in strips on the road surface 1, and even if some remaining snow is scattered, the tires of the traveling vehicle will It will be stepped on and melted.

FIG. 5 shows a second embodiment, in which the ridges 13 of the pipes 3 and 3 are adjacent to each other in the pipes 3 bent in a wavy manner.
Shifting the phase of the troughs 14 and 14, connect the crests I3 and troughs 14 of the adjacent pipes 3 to
5, the pipes are connected together to form a net-like structure as a whole.

FIG. 6 shows a third embodiment, in which a ladder 4 and an exit header S are arranged in parallel on the entrance side, and a ladder 4 is placed on the entrance side.
The middle part of the pipe 3, which has both ends connected to the outlet header 5, is folded in half to form a loop part 16, and the middle part of the pipe 3 is bent into a wavy shape as in the embodiment described above to form a peak part. 13 and troughs 14 are formed, and the peaks 13 and troughs 14 of the adjacent pipes 3 and 3 are connected by a connector 15, thereby forming a net-like structure as a whole.

FIG. 7 shows the fourth embodiment, in which each section 17 of the road
The wavy pipe 3 arranged in ... is bent into a flat U-shape, and its both ends are connected between each section 17 and 17, with one end facing the inlet side and the ladder 4, and the other end facing the outlet side. They are each connected to the header 5. With this configuration, it is possible to reverse the traveling direction of the heat medium in the intermediate portion of adjacent pipes 3 in one pipe 3.

In this case, the bent portions 3a of each pipe 3 are engaged with hooks 18 provided under the road surface of the other section 17, thereby fixing each pipe 3 at a predetermined interval. can be held.

In addition, in each of the above embodiments, the pipes 3 and
Although the traveling directions of the heat carriers of the adjacent ones are opposite to each other, the present invention is not limited to this, and they may travel in the same direction. In this way, each section 1
It is sufficient to provide one ladder 4 on the inlet side and one ladder 5 on the exit side at both ends of the tube.

Furthermore, when installing the pipe 3, which is a soft steel pipe, on a road, the installation can be done efficiently by using a winding and feeding device 19 shown in FIG. 8, for example. This winding and feeding device 19
The main body 20 is provided with a winding frame 21 for winding a straight pipe 3 made of a soft steel pipe into a coil shape, and this winding frame 2
A bend-forming mechanism 23 is provided, which is comprised of a plurality of forming rollers 22 that forms a straight pipe 3 into a wavy shape by one rotation. Therefore, the bending mechanism 23 allows the pipe 3 to be bent in a wave-like manner while being fed out and installed on the road.

(Effects of the Invention) As explained above, according to the present invention, a large number of pipes bent in a wavy manner are arranged in parallel under the road surface so that a heat medium can flow through each pipe. Snow and ice can be melted evenly on the surface, improving vehicle running performance. Furthermore, by bending the pipes into a wave shape, the number of pipes per unit area can be reduced, and the construction is simple and costs can be reduced.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention, in which FIG. 1 is a plan view of a piping unit buried under the road surface, FIG. 2 is a plan view of the piping unit, and FIG. Figure 4 is a block diagram of the road heating device, Figure 4 is an enlarged plan view showing the state of the pipes, Figure 5 is a plan view of a piping unit showing a second embodiment of the invention, and Figure 6 is FIG. 7 is a plan view showing a fourth embodiment of the invention, FIG. 8 is a plan view showing an example of the piping construction state, and FIG. A) and (B) are plan views showing conventional piping units. 1...Road surface 2...Piping unit 3...Pipe 4...Inlet side header 5...Outlet side header 13...Mountain section 14...Valley section filler
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Claims (4)

[Claims] (1) A large number of wavy pipes are arranged in parallel under the road surface, one end of each pipe is communicated with an inlet header arranged in a direction almost perpendicular to this, and the other end is connected to the A piping unit is configured by communicating with an outlet header disposed in a direction perpendicular to the pipe, and the inlet header of this piping unit is connected to the supply side of the heat medium supply source to allow the heat medium to flow through each of the pipes. A road heating device characterized by: (2) The pipes are arranged so that the directions of flow of the heat medium flowing through the pipes are opposite to each other in adjacent pipes.
Road heating device as described in section. (3) The road heating system according to claim 1, wherein the pipe is bent in a wave shape, and the peaks and valleys of adjacent pipes are connected to form a net shape as a whole. Device. (4) A patent claim characterized in that the pipes are bent in a wave shape, the peaks and valleys of adjacent pipes have the same phase, and the pipes are arranged in parallel at the same interval. The road heating device according to item 1.