JPH09209325A - Combustion type snow melting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve snow melting efficiency by jetting water into snow water in a tank, and generating turbulent flow in snow melting water, when heat is radiated from the wall of an air-heating furnace provided in a snow melting tank for melting snow. SOLUTION: This snow melting device 1 is constituted of a snow melting tank 5, an air-heating furnace 11 in which the flame of a burner 13 is blown off, a shower pipe 45, and a water jet pipe 55. Next, snow is charged in the tank 5 and brought in contact with the furnace 11, further melted by snow melting hot water shower from the pipe 45, and turbulent flow is generated in water of the tank 5 by water jetted from the pipe 55, so as to improve heat conduction efficiency from the furnace 11 to water. In this case, jetted water from the pipe 45 is formed into a thin belt-like shape, and hence the penetration area to snow blocks is widened for melting snow. Hot air is blown to the snow in the tank 5 from exhaust ports 33, 35 provided on the upper ends of exhaust pipes 25, 27. Covers 29, 31 for cleaning on the upper ends of the exhaust pipes 25, 7 are usually closed so as to prevent misfire, and a submerged accident at falling of an operator is prevented by an underwater net 39. Hereby, snow can be efficiently melted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called combustion type snow melting apparatus, in which hot air is blown into a hot air stove using a burner, and snow is melted by radiant heat from a furnace wall of the hot air stove. By creating a turbulent flow in the snowmelt water in the snowmelt tank, it promotes heat transfer from the hot stove to the snowmelt water,
The present invention relates to a combustion type snow melting device capable of improving snow melting efficiency.

[0002]

2. Description of the Related Art Conventionally, a snow melting apparatus has been used for quickly melting snow in a region where a large amount of snowfall occurs. As one type of the snow melting apparatus, hot air is blown into a furnace provided in a snow melting tank by a burner, There is a combustion type snow melting device that melts the snow thrown into the snow melting tank by the radiant heat from the wall. And in such a snow melting device, the snow melting water in the snow melting tank is pumped up, the snow in the snow melting tank is dropped through the shower, and the heat of the melted water is used to improve the snow melting efficiency. There are many examples.

[0003]

However, in such a snow melting apparatus, since the heat of the melted water is used, the snow melting efficiency can be improved to some extent, but it is only necessary to drop the melted water on the snow. Therefore, it does not promote heat transfer from the furnace wall to water, and its effect is not satisfactory.

The present invention has been made in view of the above problems, and an object of the present invention is to provide means for positively promoting heat transfer from a hot stove to water in a snow melting tank to significantly improve snow melting efficiency. It is what

[0005]

In order to solve the above problems and achieve the object, a snow melting tank according to the present invention,
A combustion-type snow melting device including a hot-air stove arranged in the snow-melting tank, a burner for blowing hot air toward the hot-air stove, and a drainage port formed on a side wall of the snow-melting tank is further provided in the snow-melting tank. A pump for pumping the melted water and sending it under pressure, and a pipe connected to the outlet of the pump and appropriately routed in the snow melting tank were configured. Then, a water ejection hole that opens at a position lower than the drainage port of the snow melting tank is formed in the pipe. As a result, a turbulent flow is generated in the snow melting water, heat transfer from the hot stove to the snow melting water is promoted, and the snow melting efficiency is significantly improved.

[0006] In one embodiment, a shower device for descending water melted in snow in a snow melting tank is provided, and a shower injection hole of the shower device has a shape in which the injected water is sprayed in a band shape. This increases the penetration of snow into the snow mass, prevents clogging due to dust in the water, and further improves snow melting efficiency.

In one embodiment, a net-like net stretched in the snow melting tank and capable of catching a falling object from above is provided, so that the safety of the worker can be achieved. ing.

Further, in one embodiment, an exhaust pipe is connected to the hot stove at one end and extends upward at the other end, and the exhaust pipe has an openable lid at the upper end. In addition to preventing misfires, in the part that extends upward, an exhaust port facing the inside of the snow melting tank formed at a position higher than the drain port is provided, and hot air is blown to the snowflakes in the snow melting tank to further improve the snow melting efficiency. You can

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a combustion snow melting apparatus according to an embodiment of the present invention, FIG. 2 is a front view with a part cut away, FIG. 3 is a plan view of the same, and FIG. 4 is a cross-sectional view taken along line 4-4 of FIG.

In the drawings, the combustion type snow melting apparatus according to the present embodiment is indicated by reference numeral 1 as a whole. The snow melting device 1 includes a housing 3 having an open upper portion, and the housing 3 is partitioned by a partition plate 9 into a snow melting tank 5 and a burner chamber 7. In the snow melting tank 5, a substantially cylindrical hot-air stove 11 is attached to the partition plate 9 at one end thereof by using appropriate attachment means. On the other hand, in the burner chamber 7, a burner 13 is also attached to the partition plate 9 by using appropriate attachment means, and flames and hot air are blown into the hot-blast stove 11 from the flame tube 14. Since this configuration is well known, further description will be omitted.

A part of the burner chamber 7 is further partitioned as a pump chamber 15 for accommodating a pump 17 in a sealed state with respect to the remaining portion. The pump 17 is for pumping the snowmelt water in the snowmelt tank 5 and pumping it to a shower device, which will be described later. In this embodiment, an underwater pump is used. In the lower part of the partition plate 9 where the pump chamber 15 is partially formed, from the snow melting tank 5 to the pump chamber 15
An opening 19 communicating with the mesh 2 is formed in the opening 19 so that dust does not flow into the pump chamber 15 from the snow melting tank 5.
1 is stretched.

A drain port 22 is provided at a predetermined height on a side wall of the snow melting tank 5 facing the partition plate 9, and a drain pipe 23 is attached to the drain port 22. The drainage pipe 23 is
As shown in the figure, it is substantially L-shaped, and one end thereof extends from the drainage port 22 to the outside of the snow melting tank 5, and the other end extends downward along a side wall of the snow melting tank to a predetermined position. The snowmelt water in the snowmelt tank 5 is normally discharged through this drainage pipe 23, and the water level of the snowmelt water in the snowmelt tank 5 does not come above this drainage pipe 23.

Reference numerals 25 and 27 are exhaust tubes for exhausting the combustion gas in the hot stove 11, and in the present embodiment, 2
Book is provided. One end thereof is connected to the end of the hot-air stove 11 opposite to the end attached to the partition plate 9 and communicates with the inside of the hot-air stove 11, and the other end faces the partition plate 9 of the snow melting tank 5. Near the corner, it extends upward as shown. As is clear from the figure, the stacks 25 and 27
Have their shapes symmetrical to each other with respect to the hot stove.

The upper and lower ends of the exhaust tubes 25 and 27 are lids 2 which can be opened and closed.
It is normally closed at 9 and 31 to prevent hot air from directly jetting upward from the snow melting tank 5 to prevent misfire.
If necessary, the lid can be opened to clean the inside of the exhaust tubes 25 and 27. Further, near the upper ends of the exhaust pipes 25 and 27, openings facing the inside of the snow melting tank 5 are provided with exhaust ports 33 and 35.
It is formed as. In this way, since the exhaust ports 33, 35 face the inside of the snow melting tank 5, the warm air from the hot air stove 11 is blown onto the snow in the snow melting tank 5 to promote the snow melting.
Since the exhaust ports 33 and 35 are located higher than the drain port 22, snow melting water does not flow into the exhaust tubes 25 and 27. The upper ends of the exhaust pipes 25 and 27 do not project from the snow melting tank 5, and an exhaust port net 37 is stretched on the upper end of the snow melting tank 5 so as to cover the upper ends thereof, thereby ensuring the safety of workers. .

Reference numeral 39 is an underwater net horizontally stretched in the snow melting tank 5 at a position slightly higher than the central position of the hot air stove 11 but lower than the drain port 22. This underwater net 39 receives snowflakes thrown into the snow melting tank 5, and when an operator accidentally falls into the snow melting tank 5,
It prevents deep submersion in the snowmelt water. In the underwater net 39, the hot stove 11, the drain pipe 23, the exhaust stack 2
Openings are formed corresponding to 5, 27 and the like.

Dust strainers 41 and 43 extending along the side plates adjacent to the partition plate 9 of the snow melting tank 5 at both end portions of the underwater net 39 in the same direction as the hot-air stove 11 with a predetermined length.
Is attached. This dust strainer 41, 4
3 is an elongated gutter-shaped bottomed gland with both ends closed in the longitudinal direction and an open top, and is made of a mesh with comparatively fine eyes, and the snowmelt water flows inside the snowmelt tank 5. When passing through the dust strainers 41 and 43, dust in water is removed and collected in this. The dust strainers 41 and 43 are easy to remove, and a large capacity is used to improve maintenance.

Reference numeral 45 is a shower pipe for constructing a shower device, which has a substantially U shape and extends along the side wall adjacent to the partition plate 9 near the upper end of the snow melting tank 5, 49 and a connecting portion 51 connecting the extension portions. The connecting portion 51 is connected to a discharge pipe 53 connected to the discharge port of the submersible pump 17. And extension 4
The tips of 7, 49 are closed, and a plurality of shower injection holes 48, 50 formed along the longitudinal direction of the extension are formed on the tube wall inside the snow melting tank 5. Injection hole 4
The shapes of 8 and 50 are such that the water sprayed from there is in the form of a thin band, for example, thin slits extending in the longitudinal direction of the extension portions 47 and 49. By injecting water in a band-like state in this manner, the permeation area of the injected water into the snow mass is expanded, and the snow melting effect is enhanced. The positions of the extension parts 47, 49 of the shower injection holes 48, 50 in the circumferential direction are such that water is sprayed obliquely downward toward the inside of the snow melting tank 5, as shown by the arrow in FIG. ing.

Reference numeral 55 is a fountain pipe arranged below the shower pipe 45, which has a shape similar to that of the shower pipe 45, and extends 57 and 59 extending along the side wall of the snow melting tank 5, and The connecting portion 61 connects the extension portions. The connecting portion 61 is connected to the discharge pipe 53 connected to the discharge port of the submersible pump 17 at a position below the shower pipe 45. And the snow melting tank 5 of the extension parts 57 and 59
A plurality of fountain holes 58 and 60 formed along the longitudinal direction of the extension are formed on the inner wall of the pipe. The positions of the extension portions 57, 59 of the fountain holes 58, 60 in the circumferential direction are such that water is jetted slightly downward and obliquely toward the inside of the snow melting tank 5, as shown by the arrows in FIG. ing. The fountain holes 58 and 60 are located below the drainage port 22 for attaching the drainage pipe 23 formed in the snow melting tank 5, and therefore the water ejected from the fountain holes 58 and 60 is It is injected into the water inside to create turbulence. As a result, the water in the snow melting tank 5 is forced to flow, the efficiency of heat transfer from the hot stove 11 to the water is improved, and the snow melting efficiency can be improved.

The tip of one extension 57 of the fountain pipe 55 is closed, but the tip of the other extension 59 is connected to a forced drain pipe 65 via a drain valve 63.
The tip side 66 passes through the drainage pipe 23 and faces the tip of the drainage pipe 23. When it is necessary to drain the water in the snow melting tank 5 as in the case of performing maintenance on the snow melting device, the drain valve is opened and the pump 17 is driven to force the water through the forced drain pipe 65. Can drain. In this case, the injection hole 4 of the shower pipe 45
8, 50 or the fountain holes 58, 60 of the fountain pipe are small holes, so that the resistance is large, and most of the water is drained from the forced drain pipe 65 having an open tip. Note that, for example, a forced drainage pipe may be branched at a portion indicated by an arrow A in FIG. 2 and a switching valve may be provided here.

In the snow melting apparatus configured as described above, the snow melting work is performed as follows, for example. Before starting the snow melting work, a groove is formed up to the level of the drainage port 22. The switches of the burner 13 and the submersible pump 17 are turned on, and the standby for the snow melting work is completed. Next, snow is put into the snow melting tank 5 to start the snow melting. In the snow melting, not only the direct contact between the hot air stove 11 and the snow but also the snow melting by the water in the heated snow melting tank and the snow melting by the hot water shower are performed. At this time, the turbulent flow generated in the snow melting water by the water injected from the fountain holes 58 and 60 of the fountain pipe 55 promotes heat transfer from the hot stove 11 to the snow melting water, and improves the snow melting efficiency. The water increased due to snow melting is drained through the drainage pipe 23.

[0021]

As described above, in the present invention, a turbulent flow is generated in the water in the snow melting tank by the water injected from the fountain holes of the fountain pipe, and the heat transfer between the hot stove and the snow melting water is promoted. The snow melting efficiency can be improved. Further, since the water sprayed from the shower spray holes of the shower device has a band-like shape, the area of permeation into the snow mass is increased, and the snow melting efficiency is further enhanced. The underwater net provided in the snow melting tank prevents the worker from being deeply submerged in the water when accidentally falls, and the upper end of the exhaust stack connected to the hot stove is closed with an openable lid to prevent misfire. Preventive,
Since the exhaust port facing the inside of the snow melting tank is provided in the middle of the exhaust pipe, the exhaust can be applied to the snow mass in the snow melting tank to further improve the snow melting efficiency.

[Brief description of drawings]

FIG. 1 is a perspective view of a combustion snow melting device according to an embodiment of the present invention.

FIG. 2 is a front view of a combustion type snow melting apparatus according to an embodiment of the present invention.

FIG. 3 is a plan view of a combustion type snow melting device according to an embodiment of the present invention.

4 is a cross-sectional view taken along line 4-4 of FIG.

[Explanation of symbols]

 1 Combustion Type Snow Melting Device 3 Housing 5 Snow Melting Tank 7 Burner Room 11 Hot Stove 13 Burner 17 Pump 22 Drain Port 23 Drain Pipe 25, 27 Exhaust Cylinder 29, 31 Lid 33, 35 Exhaust Port 39 Underwater Net 41, 43 Dust Strainer 45 Shower Pipe 48, 50 Injection hole 55 Fountain pipe 58, 60 Fountain hole 63 Drain valve 65 Forced drain pipe

Claims (4)

[Claims] 1. A snow melting tank into which snow to be melted is thrown, a hot air stove which is arranged in the snow melting tank and radiates heat to the surroundings through a furnace wall, and hot air directed into the hot air stove. In a combustion snow melting apparatus having a burner for blowing in and a drainage port formed on the side wall of the snow melting tank, the snow melting apparatus pumps out the melted water in the snow melting tank by pumping,
A pipe connected to an outlet of the pump and appropriately routed in the snow melting tank, wherein the pipe is formed with a water ejection hole that is open at a position lower than the drain port. Combustion type snow melting equipment. 2. The combustion-type snow melting device according to claim 1, wherein the snow melting device further includes a shower device for dropping the melted water in the snow melting tank onto the snow in the snow melting tank.
The combustion type snow melting device, wherein the shower injection hole of the shower device has a shape in which the injected water is ejected in a band shape. 3. The combustion type snow melting apparatus according to claim 1, wherein the snow melting apparatus is further stretched in the snow melting tank.
A combustion-type snow melting device, comprising a net-like net capable of receiving a falling object from above. 4. The combustion-type snow melting apparatus according to claim 1, wherein the snow melting apparatus further comprises an exhaust pipe connected to the hot stove at one end and extending upward at the other end, wherein the exhaust pipe is In the upwardly extending portion, an exhaust port facing the inside of the snow melting tank formed at a position higher than the drain port is provided, and the other end is provided with an openable / closable lid, Combustion snow melting equipment.