JPH0860609A - Installation for melting fallen snow on road - Google Patents

Abstract

PURPOSE: To heighten the melting efficiency of fallen snow, by a method wherein a heat-generating wire is arranged in zigzag shape and a heat-generating unit in which a range with a small pitch of zigzagging and a range with the large pitch thereof are alternately arranged is embedded under the surface of a road. CONSTITUTION: In an installation for melting fallen snow on a road, in which installation a heat-generating unit formed by arranging a heat-generating wire 3 is embedded under the surface of the road, an electric current is applied to the heat-generating wire 3, and the fallen snow is allowed to melt, the heat-generating wire 3 is arranged in zigzag shape, and a range 4 in which the pitch of a zigzag is small and a range 5 in which the pitch thereof is large are alternately arranged. In the range 4, a heating value per unit area is relatively large and the fallen snow is allowed to melt completely. On the other hand, although a heating value per unit area is relatively small in the range 5, heat from the range 4 with the small pitch of zigzagging diffuses in the range 5. Therefore, the fallen snow becomes in the state of half-melting, is leveled down by pressure owing to the passage of vehicles, and is allowed to melt advantageously. In this way, the fallen snow at a wider area can be allowed to melt with the same capacity of a power equipment, and the melting efficiency of the fallen snow can be heightened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric heating type snow melting facility for melting snow at a snow melting point such as a road surface.

[0002]

2. Description of the Related Art In a conventional road snow melting facility, a heat generating unit is installed in each snow melting section in which a plurality of snow melting points are divided,
Each heat generating unit was individually turned on and off to melt snow in each snow melting section. In this case, the power consumption when operating all the snow melting sections at the same time is the number of heat generating units x the power consumption of each heat generating unit, so if the number of heat generating units is large, the power consumption, and therefore the power facility capacity, is very large. Become. Therefore, many snow melting sections are divided into priority sections that preferentially melt snow and non-priority sections that do not, and an operation method that energizes the non-priority section during the energization suspension time generated by energization control of the priority section, so-called "priority・ "Non-priority method" is used.

[0003]

However, the conventional road snow melting equipment has the following problems. That is: 1) Since a heat generating unit having an area equal to the snow melting target area is required, the larger the snow melting target area, the higher the snow melting facility cost. 2) If the snow melting target area is small, the number of heat generating units is small, and there is no section for controlling energization, the "priority / non-priority method" cannot be used.

[0004]

DISCLOSURE OF THE INVENTION The present invention provides a road snow melting facility which solves the above problems, in which a heat generating unit having a heat generating wire is buried under a road surface and the heat generating wire is energized. In a road snow melting facility for melting snow, heating lines are arranged in a meandering shape, and a heating unit in which regions having a small meandering pitch and regions having a large meandering pitch are alternately arranged is embedded.

[0005]

As described above, when the wiring of the heat generating unit is arranged alternately with the region having a small meandering pitch and the region having a large meandering pitch, the amount of heat generated per unit area is relatively large in the region having a small meandering pitch, and snow accumulation is large. It completely melts snow. on the other hand,
In the region where the meandering pitch is large, the amount of heat generated per unit area is relatively small, but since the heat is diffused from the region where the meandering pitch is large, the snow cover is in a semi-melted state.

[0006] By the way, on a road on which a vehicle passes, even if the snow is not completely melted and is semi-melted, the pressure caused by the passage of the vehicle causes the snow to collapse and the snow melts. Therefore,
By using the snow melting facility as described above, it is possible to melt a large area with the same power facility capacity as compared with the conventional one.
In other words, the same area can be melted by a small amount of electric power equipment.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is a plan view of a road constructed with an embodiment of a road snow melting facility according to the present invention. The heat generating unit of the road snow melting equipment of this embodiment is the crosswalk 1 at the intersection.
Before the road, a 2.8m wide one-lane brake zone snow melting section 2
Installed in. This heating unit has a heater capacity of 4 kW and is designed to melt snow in an area of 2.8 m in width, 9.3 m in length and 26.0 m ^{2 in} length, and the specifications are shown in Table 1. . As shown in FIG. 2, the wiring shape of the heat generating unit is such that the heat generating wire 3 has a meandering shape with a small pitch P ₁ (50 mm) and a number of turns N (5). 5 = 250 mm), the pitch P ₂ (2
50 mm). That is, the wiring regions 4 having a high heat generation density and the wiring regions 5 having a low heat generation density are alternately arranged every 250 mm. Reference numeral 6 is a lead wire for connecting to a power source (not shown), and 7 is a connecting portion between the lead wire 6 and the end of the wiring region 4. In this embodiment, the heat generation density is 300 W / m ²
Despite the fact that only the wiring area 4 of FIG. 3 is completely melted, the wiring area 5 can also be melted by the influence of the pressure caused by the passage of the vehicle, and the area of 26 m ² can be substantially melted by the electric power of 4 kW. I was able to.

[0008]

[Table 1]

On the other hand, as a comparative example, when a heat generating unit having a conventional structure in which wires are arranged at a uniform wiring density on a snow melting surface is designed, the specifications are shown in Table 2. That is, a heating unit of 4.35 kW will melt snow in an area of 17.4 m ² .

[0010]

[Table 2]

As described above, in this embodiment, an area of 26 m ² (6.5 m ² / kW) can be substantially melted with a power of 4 kW, whereas in the comparative example, it is possible to melt snow with a power of 4.35 kW. Only the area of 0.4m ² (4m ² / kW) can be melted. As described above, in the present embodiment, compared to the comparative example, it is possible to melt the area 1.6 times (equal to 1.6 times the road length in the present embodiment) with equal power. The wiring shape of the heating wire of the heating unit according to the present invention is not limited to the above embodiment, and the number of meandering pitches of the wiring area may be even as shown in FIG. 3, for example. Further, in the above-described embodiment, the heating line is not laid between the wiring regions that generate heat, but the wiring may also be formed in a meandering wiring there.

In particular, it is desirable to design as follows. That is, 1) the small pitch P ₁ is 40 to 100 mm, the number of turns is N = 3 to 7, and then the large pitch P ₂ of 50 to 200% of P ₁ × N is 1 pitch. . Under such a numerical condition, it is possible to melt a wider area with equal power as compared with the conventional case. 2) The depth of the heating unit buried in the road should be at least P
If it is installed deeper than 1/2 the value of ₁ , the heating wire can be protected and the heat diffusion effect can be improved. 3) Since the main body of snow melting is the P ₁ part, and it is desirable to control at a part with a high heat generation density from the viewpoint of safety, the pavement or road surface temperature sensor for temperature control is arranged at the P ₁ part. .

[0013]

As described above, according to the present invention, in a road snow melting facility in which a heat generating unit in which a heat generating line is wired is buried under a road surface and the heat generating line is energized to melt snow, the heat generating line meanders. Since the heat generating unit in which the regions having a small meandering pitch and the regions having a large meandering pitch are alternately arranged is embedded in the shape of a wire, it is possible to melt a wider area with the same electric power facility capacity as compared with the conventional case. There is an excellent effect.

[Brief description of drawings]

FIG. 1 is a plan view of a road constructed with an embodiment of a road snow melting facility according to the present invention.

FIG. 2 is an explanatory diagram of a wiring shape of the heat generating unit used in the above embodiment.

FIG. 3 is an explanatory diagram of a wiring shape of another heating unit.

[Explanation of symbols]

 1 Pedestrian crossing 2 Brake zone Snow melting part 3 Heating line 4, 5 Wiring area 6 Lead wire 7 Connection part

Claims (1)

[Claims] 1. In a road snow melting facility in which a heating unit in which a heating line is wired is buried under a road surface, and the heating line is energized to melt snow, the heating line is arranged in a meandering shape and has a small meandering pitch. A road snow melting facility characterized by burying heat generating units in which regions with a large meandering pitch are alternately arranged.