JPH06220809A - Snow-melting equipment - Google Patents

Abstract

PURPOSE:To efficiently melt the snow on a road surface by precisely controlling the supply of hot water. CONSTITUTION:Between the heat radiating pipe 16 of a non-water-sprinkling snow-melting equipment part 12 and the water-sprinkling pipe 23 of a water- sprinkling snow-melting equipment part 13, a three-way valve 14 is provided, by which the heat radiating pipe 16 is exclusively communicated with either the water-sprinkling pipe 23 or a drain pipe 25 that is introduced to a drainage ditch 26. The snow-melting equipment is provided with a snowfall sensor 42 for detecting the condition of snowfall, and an earth-temperature detector 21 for detecting the temperature of the earth surface. The equipment is also provided with a control part 41 by which the three-way valve 14 is controlledly changed over on the basis of the signal from the snowfall sensor 42 or the earth-temperature detector 21.

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 on the road surface. Conventionally, as this kind of means, hot water is supplied into a water sprinkler disposed so as to be exposed on the road surface, and the hot water is sprinkled from holes formed in the water sprinkler to melt snow on the road. A sprinkler snow melting facility is known,
Separately from this, hot water is supplied to the radiating pipe buried in the road surface, the road surface is heated by the hot water passing through the radiating pipe, and the non-sprinkling snow melting facility that melts the snow on the surface of the road surface is also frequently used. Is becoming more common.

As a non-sprinkling snow melting facility, for example, the one shown in FIG. 3 is known, which is disclosed in Japanese Examined Patent Publication No. 4-45606.
It was disclosed in the issue. In this figure, reference numeral 1 is the ground, and an insulating box 2 installed in the ground 1 is provided with an underground boiler 3. Then, the water in the tank 4 is heated by the underground boiler 3, and the tank 4
Hot water of a constant high temperature is stored inside. Further, in the ground 1, a heat dissipation pipe 6 is embedded in a pavement body 5, and hot water in the tank 4 is supplied to the heat dissipation pipe 6 by a circulation pump 7, and the heat of this hot water causes the pavement body 5 to be removed. By heating, the snow on the surface of the pavement body 5 is melted. It is well known that the above snow removal facilities are widely used by appropriately providing them on slopes, sidewalks at intersections, runways at airports, and the like.

By the way, in the sprinkling snow melting facility, although the snow melting efficiency is good, there is a drawback that the surface of the pavement is frozen by the sprinkled water, and in the non-sprinkling snow melting facility, Although it is possible to obtain sufficient snow-dissipating efficiency and antifreeze effect, there is a drawback that the equipment is large-scale.
Therefore, there is proposed a facility that can efficiently remove snow by constructing a combination of these snow removing facilities. This is because the pipes of the sprinkling snow melting facility and the pipes of the non-sprinkling snow melting facility are integrally provided so that the hot water that has passed through the radiating pipe 6 of the non-sprinkling snow melting facility is sprinkled in the snow melting facility. The water is supplied to a water sprinkler, and water is sprinkled from the water sprinkler to the road surface to melt the snow.

[0005]

However, in such a combined snow melting facility, since the hot water used in the non-sprinkling snow melting facility is always supplied to the water spraying snow melting facility, for example, anti-freezing or For the purpose of rapid snow melting during snowfall, when no water was supplied to the snow-discharging facility when the snow was not accumulated and the road surface was heated, no warm water was supplied to the snow-discharging facility even though it was not necessary. The water will be supplied under the conditions, and hot water will be sprinkled on the road surface in the sprinkling area where the water sprinkling and snow melting facility is installed. As a result, there is a possibility that sprinkled water may be scattered when the vehicle or the like travels, or the road surface may be frozen due to the sprinkled water.

The present invention has been made in view of the above circumstances, and in a snow melting facility combining both a water spraying snow melting facility and a non-water spraying snow melting facility, the supply of hot water is accurately controlled,
The purpose is to provide a snow-melting facility that can efficiently melt snow.

[0007]

The snow melting facility of the present invention heats the first pavement by supplying hot water to the heat dissipation pipe embedded in the first pavement to heat the first pavement. By supplying hot water from the radiating pipe to the water-free sprinkler facility that melts snow on the pavement, and to the sprinkler pipe that is arranged so as to be exposed on the second pavement and that is connected to the radiating pipe. , A water-sprinkling and snow-melting facility section for sprinkling water from the water spray pipe onto the second pavement to melt the snow on the second pavement, and provided between the heat dissipation pipe and the water spray pipe, A valve device for selectively communicating the pipe with either one of the water sprinkling pipe or the drain pipe guided to the drainage groove, a detection unit for detecting a weather condition, and a detection signal from the detection unit, It is characterized by comprising a control unit for switching and controlling the valve device.

[0008]

According to the snow melting facility of the present invention, when hot water is sent to the radiating pipe of the non-sprinkling snow melting facility, the first pavement of the non-sprinkling snow melting facility is heated, Snow is melted on the pavement. In addition, when the hot water that has passed through the heat dissipation pipe is sent to the water spray pipe of the snow sprinkler facility, the hot water is sprayed from this water spray pipe onto the second pavement, and the snow on the second pavement is melted. . Here, based on the detection signal from the detection means for detecting the weather condition, the control unit determines whether or not it is necessary to supply hot water to the sprinkler pipe of the water sprinkling snow melting facility, and controls switching of the valve device to perform sprinkling. Warm water is properly supplied to the snow melting facility section. In other words, when it is not necessary to supply hot water to the water spray pipe of the snow sprinkler facility, the valve unit is switched by the control unit to connect the heat dissipation pipe and the drain pipe, and the hot water sent out from the heat dissipation pipe is drained. Be led to.

[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 the present invention, in which reference numeral 11 is a snow melting facility. This snow melting facility 1
1 includes a non-sprinkling snow melting facility section 12 and a water spraying snow melting facility section 13, and hot water flow paths of these snow melting facility sections 12, 13 are connected via a three-way valve 14 (valve device). Has become.

The non-sprinkling snow melting facility section 12 has a structure in which a radiating pipe 16 is embedded inside the pavement 15 (first pavement) so as to meander the entire pavement 15.
5 is made of a material having a high heat transfer and heat storage effect. The radiating pipe 16 has its hot water inlet side connected to a hot water supply pipe 17, and the hot water supply pipe 17 is connected to a water pump 19 arranged in a tank 18. The hot water outlet side of the heat radiation pipe 16 is connected to the hot water collecting pipe 20. Further, the pavement body 15 has a ground temperature detector (detection means) 21.
Is buried.

On the other hand, the sprinkler snow melting facility section 13 has a pavement 22.
The sprinkling pipes 23, 23 ... Are embedded inside the (second pavement), and the sprinkling portions 23a of the sprinkling pipes 23, 23.
23a ... Is exposed on the surface of the pavement 22. These sprinkler pipes 23, 23 ...
3a ... Has a number of holes, and the hot water that has passed through the water spray pipes 23, 23 ... Is evenly sprayed from the holes to the upper surface of the pavement 22. Further, the water spray pipes 23, 23 ...
The inlet side is connected to the sprinkling water supply pipe 24.

An underground storage pit 31 is installed between the non-sprinkling snow melting facility 12 and the snow spraying facility 13, and a three-way valve 14 is provided in the storage pit 31. There is. A hot water collecting pipe 20, a sprinkling water sending pipe 24, and a hot water drainage pipe 25 are connected to the three ports of the three-way valve 14, and the other end of the hot water draining pipe 25 is a side part of the sprinkling snow melting facility section 13. Is led into the drainage groove 26 provided in the.

A three-way valve 14 and a water pump 19 are provided in the vicinity of the non-sprinkling snow melting facility 12 and the snow spraying facility 13.
A control unit 41 is provided to control the. This control unit 4
1 is based on the output of the ground temperature detector 21 provided on the pavement 15 and the output of the snowfall detector (detection means) 42 provided outside the control unit 41 for detecting the presence or absence of snowfall.
The three-way valve 14 and the water pump 19 are controlled.

According to the snow erasing device 11 constructed as described above, when the hot water in the tank 18 is pumped up by the water supply pump 19, the hot water is supplied from the hot water supply pipe 17 to the radiating pipe of the non-sprinkling snow erasing facility section 12. The pavement body 15 is heated by the heat of the hot water that is supplied to the heat exchanger 16 and passes through the heat radiation pipe 16, and the pavement body 15 stores heat. The heat melts the snow on the pavement body 15. The warm water is a temperature at which snow on the pavement 15 can be sufficiently melted.

The hot water that has passed through the heat radiation pipe 16 collects in the hot water collecting pipe 20 and the sprinkling water sending pipe 2 through the three-way valve 14.
4 to each of the sprinklers 23,
23, respectively, and these sprinkler pipes 23, 23 ...
Are sprayed onto the upper surface of the pavement 22 from the sprinklers 23a, 23a. As a result, the snow accumulated on the pavement 22 is melted by the warm water.

Here, the hot water is supplied to prevent freezing of the pavement 15 when the temperature of the pavement 15 in the non-sprinkling snow melting facility section 12 is lower than 3 ° C., even if the outside is not in a snowfall state. Therefore, in order to quickly obtain a snow melting effect in the next snowfall, it is necessary to allow hot water to pass through the heat radiating pipe 16 as appropriate.
When supplied to 3, 23, ..., the hot water sprayed on the pavement 22 of the sprinkling snow melting facility 13 is deprived of heat on the surface of the pavement 22 by convective radiation with the atmosphere, etc. Water may freeze at the end of the flow, or water that has been sprayed and accumulated on the road surface may be scattered when the vehicle is passing.

Therefore, in this embodiment, the control section 41 controls the three-way valve 14 in the following manner to solve the above problem. This control will be described with reference to the flowchart of FIG. Step S1 The control unit 41 determines whether or not it is snowing based on the detection signal from the snowfall sensor 42. If it is snowing, the process proceeds to Step S2, and if not, the step Move to S4.

Step S2 The three-way valve 14 is switched and controlled by the control unit 41, and the three-way valve 14 controls the hot water collecting pipe 20 and the sprinkling water sending pipe 24.
And are communicated. Step S3 The water supply pump 19 is operated, the hot water in the tank 18 is supplied to the radiating pipe 16 of the non-sprinkling snow melting facility 12, the snow on the pavement 15 is melted, and the hot water passing through this radiating pipe 16 is further supplied. Is supplied to the sprinkling pipes 23, 23, ...
Hot water is sprayed onto the upper surface of the pavement 22 from 3a ..., and the snow falling on the pavement 22 is melted. After that, step S again
It shifts to 1 and it is judged whether or not there is snowfall.

Step S4 Based on the detection signal from the ground temperature detector 21, the control unit 41
However, it is determined whether the ground temperature is equal to or higher than a specified temperature (here, about 3 degrees Celsius). Here, if the ground temperature is lower than the specified temperature, the process proceeds to step S6, and if it is equal to or higher than the specified temperature, the process proceeds to step S5. Step S5, based on the detection signal from the ground temperature detector 21, the control unit 41
However, it is determined whether the ground temperature is equal to or higher than a specified temperature (here, the setting can be changed to any value at 3 ° C.), and if the ground temperature is equal to or higher than the specified temperature, the water pump 19 is stopped. After that, the process proceeds to step S1 again.

Step S6 The three-way valve 14 is switched and controlled by the control unit 41, and the three-way valve 14 causes the hot water collection pipe 20 and the hot water drain pipe 25 to be connected.
And are communicated with each other, and the process proceeds to step S7. Step S7 In this state, the water pump 19 is operated,
Hot water in the tank 18 is not sprinkled Radiant pipe 1 of the snow melting facility 12
6 is supplied to the hot water drainage pipe 25 without being supplied to the sprinkling pipes 23, 23 ... Drained to. After that, the process returns to step S1 again, and it is determined whether or not there is snowfall.

As described above, according to the snow removal facility 11 of the above-described embodiment, the heat radiating pipe 1 is sent out by the water pump 19.
The hot water that has passed through 6 is sent to the sprinkling water supply pipe 24 side if it is snowing, and to the hot water drainage pipe 25 side if it is not snowing.
By controlling the switching of 4 by the control unit 41,
The problem as described above, that is, the freezing or sprinkling of hot water at the end of the hot water by spraying hot water when there is no snowfall, and the water accumulated on the road surface is not spattered by the passage of vehicles, It can be supplied to the sprinkling snow melting facility 13 side accurately.

When hot water having a temperature of about 18 ° C. is flown into the radiating pipe 16, the temperature at which the water is sent to the sprinkling pipes 23, 23 ... Is about 13 ° C., which is the temperature of the sprinkling snow melting facility 1.
It has been confirmed that the temperature of sprinkling water in No. 3 is sufficient.

The three-way valve 14 of the embodiment may be of any type, and for example, a ball valve type solenoid valve may be used to enable quick and easy flow path switching. Furthermore, the specific configuration and structure of the snow melting facility 11 are not limited to the embodiments.

[0024]

As described above, according to the snow removal facility of the present invention, the following effects can be obtained. Based on the detection signal from the detection means for detecting the weather condition, the control unit determines whether or not it is necessary to supply hot water to the sprinkler pipe of the water sprinkling snow melting facility, and controls the switching of the valve device. It is possible to supply hot water to the sprinkling snow melting facility side accurately. That is, for example, if hot water that has passed through the heat dissipation pipe of the snow-free snow melting facility is sent to the water spray pipe to melt the snow on the second pavement on the side of the snow-free snow melting facility, If the ground temperature does not exist and the ground temperature does not reach the specified temperature, it can be flowed to the drain pipe to prevent the first pavement on the side of the non-sprinkling snow melting facility section from freezing. That is, by sending hot water unnecessarily to the sprinkling pipe of the snow sprinkler facility, the hot water generated on the second pavement of the snow sprinkler facility freezes or sprinkles at the end and accumulates on the road surface. It is possible to prevent scattered water from passing due to the passage of vehicles, and it is possible to supply water to the snow-spraying facility side with great accuracy. In addition, by directly contacting the hot water that has been used in the non-sprinkling snow-melting facility section with the temperature and then directly contacts the snowfall in the water-sprinkling snow-melting facility section, the water temperature can be reused, so that the temperature utilization range becomes large and energy is saved.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a snow removing device for explaining a configuration and a structure of a snow removing device according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating control of a three-way valve by a control unit.

FIG. 3 is a cross-sectional view of a conventional non-sprinkling snow melting facility for explaining the configuration and structure of the conventional non-sprinkling snow melting facility.

[Explanation of symbols]

 11 Snow-Discharging Facility 12 No-Water Sprinkling Snow-Discharging Facility Section 13 Water-Spraying Snow-Discharging Facility Section 14 Three-Way Valve (Valve Device) 15 Pavement (First Pavement) 16 Radiant Pipe 21 Ground Temperature Detector (Detection Means) 22 Pavement (No. Nino pavement) 23 Sprinkling pipe 25 Hot water drainage pipe (drainage pipe) 26 Drain 41 Control part 42 Snowfall detector (detection means)

Claims (1)

[Claims] 1. A non-sprinkling snow-melting method for heating the first pavement to melt the snow on the first pavement by supplying hot water to a radiation pipe embedded in the first pavement. By supplying warm water from the facility pipe to the facility part and the water spray pipe which is disposed so as to be exposed to the second pavement and is connected to the heat radiation pipe, the water from the water spray pipe to the second pavement It is installed between the water spraying and snow-fusing facility that melts the snow on the second pavement by melting water, and between the heat dissipation pipe and the water spray pipe, and the heat dissipation pipe is guided to the water spray pipe or the drain groove. A valve device that selectively communicates with one of the drain pipes, a detection unit that detects a weather condition, and a control unit that controls switching of the valve device based on a detection signal from the detection unit. A snow-melting facility characterized by