JPH0313612A - Snow eliminating method and apparatus using underground water heat - Google Patents

Abstract

PURPOSE:To reduce the maintenance cost by pumping up underground water and passing the same through a radiating pipe under a road to melt snow on the road, returning the water generated by melting of snow into a well, and then again pumping up the water to be sprinkled on the road, thereby melting the snow. CONSTITUTION:A deep well 1 is dug, and a lifting pipe 2 for sprinkling no water and eliminating snow, a return pipe 3 and an underwater motor pump 4 for sprinkling water and eliminating snow are installed in the well. In this case, the lifting pipe 2 and the return pipe 3 are connected to a radiating pipe 8 buried in a road face 12 through a circulating pump 7. The underwater motor pump 4 is connected to a nozzle 9 for sprinkling water and eliminating snow provided on the road face 12 by a pipeline. In response to a signal generated by a snowfall detector, the circulating pump is operated to pump up underground water in the well 1 through the lifting pipe 2 and feed the same to the radiating pipe 8. Heat accumulated at that time is radiated on the road face 12 to melt snow, and the underground water is returned into the well 1 through the return pipe 3. Further, the underground water is again pumped up by the pump 4 and fed to the nozzle 9 for sprinkled water and eliminating snow to sprinkle water on the road face 12 and melt snow.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a lightning extinguishing method and device using underground water heat to melt snow falling on roads in snowy and cold regions and prevent it from freezing. The present invention relates to a lightning extinguishing method using groundwater heat, which effectively uses the warm heat of groundwater from inside a well to effectively melt snow falling on a road surface and also prevents freezing, and an apparatus therefor.

[Conventional technology]

The conventional lightning extinguishing method, as described in Japanese Patent Application Laid-Open No. 138010/1983, involves drilling a well that reaches the underground water layer.
A return pipe that allows circulating water to flow into this well is inserted to the bottom of the well, and a multi-tube arrangement folded part is provided at the bottom of this return pipe to which the circulating water is sent back. The circulating water that is warmed through heat exchange with groundwater in a multi-pipe arrangement is sprinkled onto the road surface, or the water is passed through heat radiation pipes buried within the road surface, using a non-sprinkling water lightning extinguishing method. There were known things that extinguished lightning.

[Problem to be solved by the invention]

However, in such conventional lightning extinguishing methods, a multi-tube array folded portion is provided within the well. A so-called heat exchanger is installed, and a return pipe and a feed pipe are connected to this heat exchanger and connected to a lightning extinguisher on the ground, so heat from the groundwater is obtained by the heat exchanger and circulated to the ground through the feed pipe. Water is sent to extinguish lightning on the road surface.

Since the circulating water is returned to the return pipe installed adjacent to the same well, the heat of the circulating water in the feed pipe is transferred to the cold circulating water in the return pipe, and the road surface on the ground is Since the circulating water at a lower temperature, which is the average of the circulating water inside each, is sent to the road surface lightning extinguishing device, the lightning extinguishing effect was small.

In addition, a fan is installed at the bottom of the well to force convection of the groundwater to forcibly stir the groundwater and exchange heat, increasing the heat extraction effect. The supply of heat from the aquifer surrounding the well depends solely on heat conduction due to the difference in temperature between the cold groundwater stored in the well and the temperature within the aquifer. Therefore, the amount of heat supplied is very small, and a large lightning extinguishing effect cannot be expected, and the lightning extinguishing area is extremely small.

Therefore, in order to eliminate the above-mentioned drawbacks, the present invention provides at least one of the pumping pipe and the return pipe installed in the well with an insulating structure, so that the groundwater or antifreeze flowing in both pipes exchanges heat with each other and the temperature is averaged. In addition, the warm groundwater in the aquifer is sucked and flows inside the well, forcing heat to be supplied to the heat exchanger, increasing the efficiency of heat exchange, making it effective and cost-effective to maintain. The purpose of the present invention is to provide an inexpensive lightning extinguishing method using underground water heat and its device.

[Means to solve the problem]

In order to achieve the above object, the present invention pumps up warm groundwater from a deep well through a pumping pipe with an insulated structure by operating a circulation pump during snowfall in winter, and passes the water into a heat dissipation pipe buried in the road surface. heat is stored in the road surface, the heat is radiated onto the road surface to melt snow falling on the road surface, and also prevents the road surface from freezing, and returns the cold water after snow melting and anti-freezing to the deep well, At the same time, groundwater in the deep well is pumped up by a submersible motor pump and sent to a water spray snow melting nozzle installed on the road surface, and the ground water is sprayed from the water spray snow melting nozzle onto the road surface to melt the snow falling on the road surface. This is a lightning extinguishing method using groundwater heat, in which a pumping pipe and a return pipe for waterless snow melting and a submersible motor pump for watering snow melting are installed in a deep well for groundwater pumping, and the pumping pipe is is inserted close to the bottom of the well as an insulating structure, and the return pipe is guided below the water surface in the well, and the lift pipe and return pipe are connected to a heat radiation pipe installed in the road surface via a circulation pump. Further, the submersible motor pump is connected to a water-sprinkling snow-melting nozzle installed on the road surface through a conduit.

[Effect]

Next, one aspect of the present invention will be explained.

The lightning extinguishing method and device using groundwater heat of the present invention pumps up warm groundwater from a deep well using a pumping pipe by operating a circulation pump during snowfall in winter, and passes the water through a heat radiation pipe buried in the road surface. The heat from the groundwater is stored in the road surface, and the heat is radiated onto the road surface to melt the snow falling on the road surface and also prevent the road surface from freezing, and after the snow melts and prevents freezing, the cold water is sent back to the Moegi well through a return pipe. Send it back within. At this time, at least one of the lift pipes and return pipes has an insulated structure, so warm groundwater is pumped up without being cooled, while cold groundwater after snow melting and freezing prevention is pumped into the well. It is sent back and mixed with the groundwater that was originally in the well. At the same time, the mixed groundwater is pumped up by a submersible motor pump installed in the deep well for snow melting and sent to a nozzle for snow melting installed on the road surface, and groundwater is sprayed from the snow melting nozzle. and sprinkle water on the road surface.
The mixed cold groundwater is sprinkled onto the road surface, similar to melting snow that falls on the road surface, so warm groundwater within the aquifer is constantly extracted and supplied into the heat dissipation pipes.

Furthermore, in the lightning extinguishing method using underground water heat using a heat exchanger according to the present invention, at least one of a pumping pipe or a return pipe is connected to the heat exchanger with a heat insulating structure, and a heat radiation pipe and a circulation pump are buried in the road surface. A circulation pipe is formed through the heat exchanger, and the circulation pipe is filled with antifreeze, and when it snows in winter, the heat of the groundwater from near the bottom of the deep well is transferred to the antifreeze inside the heat exchanger, and the circulation pump When the antifreeze is activated, the heated antifreeze is sent into the heat dissipation pipes buried in the road surface, and heat is stored in the road surface.
The heat dissipates to melt the snow falling on the road surface and also prevents it from freezing. After the snow melts and prevents it from freezing, the cold antifreeze is sent back to the heat exchanger via the return pipe, and is recycled from the warm groundwater in the well. get a fever

On the other hand, a submersible motor pump for snow-melting with water is installed in the deep well, and this submersible motor pump is connected to a nozzle for snow-melting with water buried in the road surface through a pipe. The cold groundwater in the well is drained, so that the heat of the aquifer is constantly extracted and the heat is forced into the heat exchanger.

At the same time, the groundwater in the well, which has been heated and cooled in this way, is sent to the snow-melting nozzle and sprayed with water on the road surface to melt the snow falling on the road surface.

〔Example〕

Next, embodiments of the lightning extinguishing method using groundwater heat and its device according to the present invention will be described with reference to the drawings.

First Embodiment FIG. 1 shows an embodiment in which the lightning extinguishing method using underground water heat according to the present invention is applied to a road surface. As shown in the figure, a deep snow well with a depth of 50 m to 200 m is excavated for groundwater pumping to carry out the lightning extinguishing method using groundwater heat of the present invention, and a pumping pipe 2 for non-sprinkling snow melting is installed inside this deep well. A return pipe 3 and a submersible motor pump 4 for watering and snow removal are installed, the lift pipe is wrapped with a heat insulating material 5 and inserted close to the bottom of the well, and the return pipe 3 is guided below the water surface of the operating water level 6 in the well. The pumping pipe 2 and the return pipe 3 are connected via a circulation pump 7 to a heat radiation pipe 8 buried in the road surface 12.

The submersible motor pump 4 is installed below the operating water level 6 in the well, and is connected by a pipe to a nozzle 9 for watering and snow sliding provided on the road surface.

Therefore, in this embodiment configured in this way,
During snowfall in winter, a circulation pump is activated by a signal emitted by a snowfall detector (not shown), and warm groundwater of about 15 to 16 degrees Celsius is pumped up from the aquifer 10 at the bottom of a deep well through an insulated pumping pipe and into the road surface. The heat is sent to a buried heat dissipation pipe, and the heat is stored inside the heat dissipation pipe at a flow rate of 0.3 m/sec to 1.5 m/sec, storing heat within the road surface.The heat is then radiated onto the road surface to melt snow falling on the road surface. It also prevents road surfaces from freezing.

After snow melting and freezing prevention, the cold water of approximately 7 to 9° C. is returned to below the operating water level in the well through a return pipe and mixed with the groundwater that was originally in the well.

Simultaneously with the operation of the circulation pump, a submersible motor pump installed in the deep well for watering and snow melting also began to operate, and the mixed groundwater at a temperature of approximately 10 to 11°C was pumped up by pump 4 and installed on the road surface. It is possible to send underground water to a water sprinkling snow skiing nozzle, and from the water sprinkling snow skiing nozzle, ground water is sprayed onto the road surface to melt the snow falling on the road surface.

At this time, as the groundwater in the well is drained, warm groundwater of approximately 15 to 16° C. in the aquifer 10 is sucked into the deep well 1 and constantly flows into the water pumping pipe.

In addition, in this embodiment, it is also possible to directly connect the return pipe after non-sprinkling water extinguishing to the pipe line leading to the water spray snow sliding nozzle,
In this case, it is possible to operate with only the circulation pump, eliminating the need for a submersible motor pump for watering and snow-melting. However, if the operating water level is too low and it is impossible for the circulation pump to pump water, the lower part of the tip of the pumping pipe All you need to do is install a submersible motor pump and install it below the operating water level.

In addition, the embedding form of the heat dissipation tube buried in the road surface may be any suitable form such as meandering zigzag shape, parallel shape, spiral shape, etc., and the buried form is not particularly limited. The same applies to the following second and third embodiments.

Second Embodiment Fig. 2 shows an example in which the lightning extinguishing method using groundwater heat of the present invention is applied to a road surface. A deep snow well with a depth of 50 m to 200 m is excavated for groundwater pumping, and inside this deep well, a pumping pipe 2 and a return pipe 3 for non-sprinkling snow melting, and a submersible motor pump 4 for water spraying snow melting are installed. The return pipe 3 is wrapped with a heat insulating material 5 and inserted close to the bottom of the well, and then the pumping pipe 2
is guided below the water surface at the turning point 6 (in the well), and the lift pipe 2 and return pipe 3 are connected to the road surface 12 via a circulation pump 7.
The submersible motor pump 4 is connected to a heat dissipation pipe 8 buried in the well, and is installed below the water surface of the operating water level 6 in the well, and is connected by a pipe to a nozzle 9 for watering and snow sliding provided on the road surface.

Therefore, in this embodiment configured in this way,
During snowfall in winter, a circulation pump is activated by a signal emitted by a snowfall detector (not shown), and groundwater is pumped up from below the operating water level inside the deep well using a pumping pipe and sent to a heat dissipation pipe buried in the road surface, where the flow rate is zero. .3m/sec to 1.5m/sec inside the heat dissipation tube to store heat in the road surface, and radiate that heat onto the road surface to melt the snow that falls on the road surface and also prevent the road surface from freezing. The cold water after snow melting and freezing prevention is returned to near the bottom of the well through an insulated return pipe, where it is mixed with the groundwater that was originally in the well. Simultaneously with the operation of the circulation pump, a submersible motor pump for watering and snow removal installed in the deep well also starts operating, and the mixed groundwater is pumped up by the pump 4 and sent to the watering and snow sliding nozzle installed on the road surface. It is possible to spray underground water from the water spray nozzle onto the road surface and melt the snow that falls on the road surface. At this time, as the groundwater in the well is discharged, warm groundwater in the aquifer 10 is sucked into the deep well 1 and flows into it.

In this second embodiment as well, it is possible to directly connect the return pipe after non-sprinkling water extinguishing to the conduit leading to the water spray snow melting nozzle. A submersible motor pump for snow is not required, but if the operating water level is too low to pump water using a circulation pump, a submersible motor pump is installed at the bottom of the tip of the water pump.

A submersible motor pump can be installed below the operating water level.

Third Embodiment FIG. 3 shows an embodiment in which the lightning extinguishing method using underground water heat of the present invention is applied to a road surface. As shown in the figure, a deep snow well with a depth of 50 m to 200 m is excavated for groundwater pumping to carry out the lightning extinguishing method using groundwater heat of the present invention, and a snow melting method without water spraying is carried out near the bottom of the water inside this deep well. Install the heat exchanger 1 snow.

A submersible motor pump 4 for spraying and snow melting is installed below the operating water level 6 inside the deep well, and of the lift pipe 2 and return pipe 3, which are connected to the heat exchanger, the pipe of the lift pipe 2 is insulated. A circulation pipe is formed via a circulation pump 7 between a heat dissipation pipe 8 which is wrapped around the material 5 and buried in the road surface 12. is 5% to 55% by weight! ! ! ! 11 Antifreeze, preferably propylene glycol.

The submersible motor pump for snow-blowing with water is connected to the nozzle 9 for snow-blowing with water on the road surface through a conduit.

The heat exchanger may consist of a large number of thin straight pipes, a large number of thin spiral pipes, or a large number of fins attached to increase the heat transfer area and improve heat exchange efficiency. The structure is not particularly limited.

Therefore, in this embodiment configured in this way, when it snows in winter, the circulation pump is activated by a signal emitted from a snow detector (not shown), and one pipe 2 connected to the heat exchanger operates the circulation pump inside the heat exchanger. Antifreeze heated to 13 to 14 degrees Celsius is pumped and sent to heat dissipation pipes buried in the road surface.
Heat is stored in the road surface by flowing through the inside of the heat dissipation tube at a flow rate of 0.3 m/sec to 1.5 m/sec, and the heat is radiated onto the road surface to melt snow falling on the road surface and also prevent the road surface from freezing. After snow melting and freezing prevention, the antifreeze solution at a temperature of about 7 to 9° C. is returned to the heat exchanger through the other pipe 3.

Simultaneously with the operation of the m4 pump, the submersible motor pump 4 for snow-melting with water, which is installed below the operating water level in the deep well, also starts operating, giving heat to the heat exchanger in the deep well to approximately The groundwater whose temperature has dropped to 10 to 11 degrees Celsius is pumped up by the pump 4 and sent to a water spray snow melting nozzle installed on the road surface, and the ground water is sprayed from the water spray snow melting nozzle and sprinkled on the road surface.
It is possible to melt snow that falls on the road surface.

At this time, the submersible motor pump 4 drains the groundwater in the well, so that about 15 to
It sucks groundwater at 16°C, extracts the heat held by the groundwater in the aquifer, and forcibly applies heat to the heat exchanger to warm up the antifreeze inside, and then sprays it on the road surface with a snow-melting nozzle. It is pumped up to.

Furthermore, since at least one of the lift pipe and return pipe connected to the upper part of the heat exchanger has an insulated structure, the antifreeze in the heat exchanger that is warmed deep inside the well is cooled down, and and the antifreeze in the return pipe do not exchange heat with each other.

〔Effect of the invention〕

Since the present invention has the configuration as described above, it has the following effects.

According to the lightning extinguishing method and device using groundwater heat, warm groundwater and cold groundwater flow in opposite directions in two pipes, a pumping pipe and a return pipe, inside a pumping well, but at least one pipe Because the pipes have an insulated structure, the underground water in the two pipes exchanges heat with each other, and the temperature is averaged, preventing the pumped water from dropping by 1 degree Celsius. In addition, since groundwater in the well is pumped up by a submersible motor pump installed in the same well for snow melting with water, warm groundwater is sucked from the aquifer deep below the ground, and the heat is extracted for waterless snow melting. It can be used as a heat source.

The heat is sent to a heat dissipation tube buried in the road surface and stored in the road surface, and by dissipating this heat, it is possible to melt the snow falling on the road surface and prevent it from freezing. The groundwater used in this way is returned to the same well, mixed with warm groundwater sucked from the deep underground aquifer, and used as a water source and heat source for snow melting using a submersible motor pump for snow melting. It is possible to melt the snow that falls on the road surface by spraying water on the road surface from a snow-melting nozzle that is pumped up and installed on the road surface.
The lightning extinguishing area is twice that of conventional lightning extinguishing facilities.
The effect will increase over time.

In addition, heat exchangers are provided at the tips of the pumping pipe and the return pipe, and the insides are filled with antifreeze, and at least one of the two pipes has an insulating structure, so that the temperature of the pumping antifreeze drops as described above. can be prevented. In addition, a heat exchanger is installed deep underground in the well, and the cooled antifreeze is returned to the heat exchanger, but warm groundwater is sucked in from the aquifer deep underground, and the heat is forced into the heat exchanger. The internal antifreeze is efficiently heated through heat exchange, and this heated temperature is sent to the heat radiation pipes buried in the road surface and stored on the road surface, and the heat is radiated to prevent snow from falling on the road surface. It is possible to perform freezing prevention as well as melting. Furthermore, the groundwater after heat exchange is pumped up by a submersible motor pump for water spray snow melting, and it is also possible to melt the snow falling on the road surface by sprinkling water from water spray snow melting nozzles installed on the road surface. The area is twice as large as that of conventional lightning extinguishing facilities, HR costs are lower, and effective lightning extinguishing and freezing prevention are possible.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram showing a first embodiment, FIG. 2 is a schematic explanatory diagram showing a second embodiment, and FIG. 3 is a schematic explanatory diagram showing a third embodiment. 1... Deep well, 2... Lifting pipe, 3... Return pipe, 4... Submersible motor pump, 5... Insulating material, 6... Operating water level. 7...Circulation pump, 8...Radiation pipe, 9...Water spray nozzle for snow removal. 10... Aquifer, 11... Heat exchanger, 12...
・Road surface.

Claims (6)

[Claims] (1) During snowfall in winter, warm groundwater is pumped up from deep wells through insulated pumping pipes when it snows in winter, and is passed through heat dissipation pipes buried within the road surface, storing heat from the groundwater within the road surface. The heat is radiated onto the road surface to melt the snow falling on the road surface and also prevent the road surface from freezing, and the cold water after melting and preventing freezing is returned to the deep well, and at the same time, the groundwater in the deep well is Ground water is pumped up by a submersible motor pump and sent to a water spray snow melting nozzle installed on the road surface, and groundwater is sprayed from the water spray snow melting nozzle onto the road surface to melt snow falling on the road surface. Snow melting method using heat. (2) During snowfall in winter, a circulating pump is activated to pump up warm groundwater from a deep well using a pumping pipe, and pass the water through a heat radiation pipe buried within the road surface, storing the heat of the groundwater within the road surface;
The heat is radiated onto the road surface to melt the snow falling on the road surface and also prevent the road surface from freezing, and the cold water after melting snow and preventing freezing is guided to near the bottom of the deep well by a return pipe with an insulated structure. At the same time, the groundwater in the deep well is pumped up by a submersible motor pump and sent to a water spray snow melting nozzle installed on the road surface, and the ground water is sprayed from the water spray snow melting nozzle onto the road surface and falls on the road surface. A snow-melting method that uses groundwater heat to melt snow. (3) During snowfall in winter, the heat of groundwater is transferred from near the bottom of the deep well to the antifreeze inside the heat exchanger, and by the operation of the circulation pump, the warmed antifreeze is sent into the heat radiation pipe buried in the road surface and released into the road surface. It stores heat and releases the heat to melt the snow falling on the road surface and also prevent it from freezing.The cold antifreeze solution after melting and preventing freezing is sent back to the heat exchanger via the return pipe, and at the same time it is Groundwater is pumped up by a submersible motor pump and sent to a water spray snow melting nozzle installed on the road surface, and the ground water is sprayed from the water spray snow melting nozzle onto the road surface to melt the snow falling on the road surface. Snow melting method using groundwater heat. (4) A lift pipe and return pipe for non-sprinkling snow melting, and a submersible motor pump for water spray snow melting are installed in a deep well for groundwater pumping, and the pump pipe is inserted close to the bottom of the well as an insulating structure. The return pipe is led below the water surface in the well, and
The lift pipe and the return pipe are connected to a heat radiation pipe installed in the road surface via a circulation pump, and the submersible motor pump is connected to a water spray snow-melting nozzle installed in the road surface by a pipe line. Snow melting equipment that utilizes groundwater heat. (5) A lift pipe and a return pipe for non-sprinkling snow melting and a submersible motor pump for water spray snow melting are installed in a deep well for groundwater pumping, and the return pipe is inserted close to the bottom of the deep well as an insulating structure. The pumping pipe is led below the water surface in the well, the return pipe and the pumping pipe are connected to a heat dissipation pipe buried in the road surface via a circulation pump, and the submersible motor pump is installed on the road surface. A snow-melting device that utilizes groundwater heat, characterized by being connected to a water-sprinkling snow-melting nozzle through a conduit. (6) A heat exchanger for waterless snow removal and a submersible motor pump for water sprinkler snow removal are installed underwater in a deep well for groundwater pumping,
At least one of the pumping pipe and the return pipe leading to the heat exchanger has a heat insulating structure, and a circulation pipe is formed between the pipe and a heat radiation pipe buried in the road surface via a circulation pump. 1. A snow melting device using underground water heat, characterized in that the submersible motor pump for water spray snow melting is connected to a road surface water spray snow melting nozzle through a conduit.