JP2005036622A5 - - Google Patents

Description

Hot air snow melting equipment

  The present invention relates to a structure of a snow melting device on a road or the like using warm air.

In cold snowy regions, various methods and apparatuses are used to prevent accidents caused by snow pressure on the ground such as roads or freezing on the road surface during winter.
Electric road heating that uses a heating wire buried in the ground to warm the road surface directly, hot water road heating that melts snow by flowing hot water through the pipe, or steam heating that heats the road surface through steam in the pipe Etc. are being implemented. In addition, use of heat pipes and the like has been attempted.
In addition, what is called a warm air snow melting tank is put into practical use, but this is a technique that melts snow by putting snow into the tank where hot air blows out, depending on human power or machines, and is mainly used for snow removal. The purpose is not to melt snow on the road directly with warm air.
There is also a method in which a warm air space is provided between two layers of soil that is lower in density than the surface layer soil that forms the road surface, and the upper layer portion is warmed around the hot air pipe that makes a small hole in it to melt the snow on the road surface directly It has been proposed but has not been put into practical use.
A concrete hot-air snow-melting tank has been proposed that is buried in the ground to guide the surrounding geothermal heat into the hot-air space and is placed at a position where the road surface is near the upper surface, but this has not been put into practical use.

The above-mentioned conventional technology is a method or apparatus suitable for relatively small-scale snow melting, but cannot be applied when the processing area is large, and it is also applicable to a snow-melting apparatus such as electrothermal heating for large-scale snow melting. In that case, the consumption of electricity such as electricity, gas or oil increases, and if the amount of snowfall per hour increases, it becomes difficult to cope with it, and the rise of the road surface temperature due to automatic operation becomes slow and it takes time to melt snow. Or problems such as inefficiency.
In addition, since there is a problem of damage to buried pipes or hoses or heating wires due to the passage of vehicles, maintenance is costly. The use of warm air for heat storage is desired because it is difficult to use.
JP 59-185203 A Japanese Utility Model Sho 62-181626 JP 2001-279630 A

  A problem to be solved is to put into practical use a snow melting device that solves the above problems and considers the use of heat storage by hot air as a device that does not require running costs for snow melting in an extremely large area.

  In the present invention, basically, hot air supplied from a hot air supply pipe is stored in a header pipe once based on a blower fan, and then supplied to a cylindrical structure embedded in the basement, and is cylindrical. It is used to melt snow on the ground surface by discharging heat from the hot air outflow hole that opens to the peripheral wall of the structure and releasing it to the surrounding space of the cylindrical structure and its gap space to transfer heat and convection. Thus, the problem is solved as a snow melting device that achieves high efficiency by forcibly discharging cold / warm air convection in the cylindrical structure from the exhaust pipe to the outside.

The present invention has the following specific effects that sufficiently solve the problems.
That is, it is possible to melt snow on the road surface only by using waste heat, and even if fuel such as oil is used to create hot air, its consumption is small, and it is free to load depending on the vehicle etc. acting on the ground, It is possible to always supply waste heat, the heat storage action can be fully utilized, an economic effect that does not require a running cost is extremely high, and a large use area can be obtained.

  A cylindrical structure is formed based on a corrugated tube that can be easily used, and among the many small holes that open to the peripheral wall, the small hole located at the top is arranged along the longitudinal center line of the tube. At the same time, a pipe that is provided with a fan and forcibly feeds and intakes air is provided in the cylindrical structure, and a granular stone is appropriately selected depending on the application, and the apparatus is configured to cover the periphery of the cylindrical structure.

FIG. 1 is a transverse sectional view showing an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the embodiment.
A semi-cylindrical corrugated tube 10 that is buried in the ground and has openings formed by a large number of convection holes 9 is formed on the peripheral wall by shielding both ends of the corrugated tube 10 with the earth plates 8 to provide a blower fan 3. The hot air pipe 4 is connected to the header pipe 7, and the heating pipe 19 is extended from the header pipe 7 so as to penetrate the earth plate 8 so that the open end 13 is located above the corrugated pipe 10. The cold pipe 6 is passed from the lower side of the corrugated pipe 10 to the earth plate 8 and extended to the ground via the exhaust fan 5, and the outer periphery of the corrugated pipe 10 and the earth plate 8 is covered with the granular stone 2. A snow melting road surface 1 is provided above the stone 2.
The convection hole 9 is provided in a corrugated valley or ridge of a corrugated tube 10 with a hole of about 10 to 20 cm extending in parallel with the corrugation, but the shape and size are limited to this. It is best to arrange the corrugated tube 10 along the uppermost center line in the longitudinal direction at the time of installation.
The earth plate 8 is for preventing the invasion of soil from the end of the corrugated pipe 10, and the shape and the like can be freely selected.

  The warm air 12 sent out from the blower fan 3 once accumulates in the header pipe 7, then flows through the heating pipe 13 and flows from the opening end 13 in the corrugated pipe 10 that is a cylindrical structure, and enters the corrugated pipe 10. The air moves upward and fills the inside of the pipe while moving up the gap 15 between the granular stones 2 while warming the granular stones 2. The heat H accumulated in the lower part of the road surface 1 and transmitted to the road surface 1 is transmitted to the road surface 1. It will melt snow. The hot air 12 that has been absorbed by the road surface 1 and has lost heat H and has fallen as cold air 16 descends as cold air 16, and is continuously supplied and convected with the rising hot air 12 through the convection hole 9 of the corrugated pipe 10. Then, the air is forcedly discharged to the outside air by the exhaust fan 5 from the suction port 14 of the cold / hot pipe 6 provided in the corrugated pipe 10. In this embodiment, the granular stone 2 itself becomes a heat storage body, and the corrugated pipe 10 also plays a role of heat storage.

FIG. 3 shows a state of use in the case where a plurality of snow melting devices of the present embodiment are arranged side by side and used for snow melting in a large area, but a wide range of snow melting is possible by carrying out as shown in the figure. The hot air 12 supplied from the hot air pipe 4 is temporarily accommodated in the header pipe 7, and is then distributed evenly to each corrugated pipe 10 as a cylindrical structure through the heating pipe 19 so that the road surface snow melt on the upper layer of the corrugated pipe 10 is melted. It will be performed under the same conditions.
In this embodiment, the same corrugated pipe as the corrugated pipe 10 can be crossed as the header pipe 7, and a separate header pipe 7 is arranged in the crossing corrugated pipe. It is also possible to do.

FIG. 4 is a partially exploded perspective view showing an example of another cylindrical structure, and is an example in which the cylindrical corrugated tube 10 is used as a pipe itself. The convection hole 9 is provided over the entire peripheral wall of the corrugated pipe 10, both ends are shielded by the earthing plate 8, the heating pipe 19 penetrating the earthing plate 8, the open end 13 of the cold and hot pipe 6, and the cold air It is the same as that of the said Example that it is comprised so that the suction inlet 14 may be located in the corrugated pipe | tube 10. FIG.
By using the convection hole 9 provided in the corrugated pipe 10 in the entire peripheral wall, it can be used in the same underground environment as that of the semi-cylindrical corrugated pipe 10.
When the cylindrical structure of the cylindrical corrugated pipe 10 in this embodiment is used, the difference in height of the space in the pipe can be larger than that in the above embodiment, and the convection can be improved, and the snow melting area can be increased. In addition, there is an advantage that the pipe diameter can be selected and used only by processing the convection hole 9.

5 and 6 are partial external views showing a single unit of a cylindrical structure in still another embodiment.
In FIG. 5, the corrugated pipe is not a cylindrical structure, but a half-ring-shaped frame 20 is arranged, and the expanded metal 17 is covered with a mesh plate around it to form a cylindrical structure having an opening. FIG. 6 shows a structure in which a rectangular structure is formed by forming a frame by a rectangular frame body 21 and applying an expanded metal 17 around the frame structure.
In the present embodiment, an example in which the expanded metal 17 is used as the mesh plate is shown. However, the expanded metal 17 is not limited to the expanded metal. For example, a thin plate such as a reinforced plastic having many small holes as convection holes is used. In other words, any material having the necessary strength can be used.

  In the embodiment shown in the figure, the movement of the air in the cylindrical structure 10 is forced by the heating pipe 19 and the cooling / heating pipe 6 penetrating the retaining plate 8 that shields both end faces of the cylindrical structure 10. Although the illustration is omitted, although the drawing is omitted, the introduction and laying of the heating pipe 19 and the cooling / heating pipe 6 into the cylindrical structure 10 is a problem of efficiency in addition to passing through the retaining plate 8. An apparatus which is provided by penetrating the side wall of the cylindrical structure 10 or led from the bottom of the cylindrical structure 10 through the ground, accepting the need for some trouble in laying and the like without Can fulfill its purpose and can be implemented.

  As a heat source in the present invention, it can be realized as an extremely efficient snow melting device by making and supplying warm air 12 constantly in winter using waste heat discarded in facilities such as ordinary homes, factories or hospitals, Depending on the situation, it may be necessary to supply air heated by a burner. At this time, it is possible to supply a sufficient amount of heat necessary for melting snow even with a small burner with low fuel consumption by using in combination with waste heat. . Even if hot air 12 exceeding the necessary amount of heat is sent, the temperature in the cylindrical structure 10 and the granular stone 2 and the gap 15 thereof is balanced, and excess unconsumed hot air is sucked into the cold pipe 6 and released to the outside air. Therefore, it is not necessary to use a large burner. By providing the granular stone 2, the initial amount of heat of the warm air 12 is stored, and heat dissipation can be continued for a considerable time after the supply is stopped.

  The granular stone 2 in the present invention is required to have an appropriate gap between the granular stones 2. If the particles are too small, the gaps are also small, the air flow is poor and convection does not easily occur, and the particles are too large. The heat of the hot air is quickly absorbed by the road surface and the heat storage effect of the granular stone 2 is lost. Ordinary crushed stone, gravel or sand is suitable as an approximate guide.

  It is also a kind of heat exchanger that uses waste heat to create warm air and release the cool air after heat release to the outside air, which requires some heat in the facility besides melting snow accumulated on the ground surface For example, diversion to a plant, a house for food cultivation, etc. can be considered.

  It is a cross-sectional view showing an embodiment of the present invention. Example 1   It is a longitudinal cross-sectional view of the AA line in FIG.   FIG. 2 is a diagram illustrating a usage state of the embodiment illustrated in FIG. 1.   It is a partial exploded perspective view which shows another Example. (Example 2)   It is a partial external view showing another embodiment. (Example 3)   It is a partial external view which shows other Example. (Example 3)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Road surface 2 Granular stone 3 Fan 4 Hot air pipe 5 Exhaust fan 6 Cold pipe 7 Header pipe 8 Stop plate 9 Convection hole 10 Cylindrical structure 11 Soil 12 Hot air 13 Open end 14 Inlet 15 Clearance 16 Cold air 17 Expanded metal 18 Gap 19 Heating pipe 20 Ring-shaped frame 21 Square frame H Heat

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