JP2003041546A - Snow melting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To completely burn burner exhaust by means of a compact device structure for omitting a chimney. SOLUTION: On the basis of a technical assumption that this snow melting device is provided with a furnace body arranged inside a case body for discharging burner flame inside the internal space of the furnace body, a half or more of the inside wall face of the furnace body is formed into a circular arc shape substantially in a plane vision, while on the upper face of the furnace body, an approximately cylindrical heating plate is arranged in the vertical direction, and an exhaust opening is arranged in the outer circumference part of the heating plate and multiple holes are arranged in the heating board.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow melting apparatus for melting ice and snow by using a burner flame, and more particularly to a furnace body structure for realizing smokelessness by completely burning the burner flame.

[0002]

2. Description of the Related Art As shown in FIG. 3, a snow melting device using a burner flame emits a flame to a case body 1, a furnace body 2 housed inside the case body 1, and an internal space of the furnace body 2. And a burner device 3. The furnace body 2 is generally installed at a position slightly separated from the bottom surface 4 of the case body 1, and a lower space 5 is generally provided. 6 is a chimney for discharging the burner flame to the outside air.

In use, ice snow to be disposed of is thrown from the top of the furnace body 2 which has been heated to a high temperature by the burner flame, and instantaneous snow melting is achieved by contact with the furnace body 2, while the case body 1 and the furnace body 2 are connected. Improve the efficiency of snow melting by increasing the temperature of the snow melting water that accumulates in the gap. The lower space 5 is provided on the lower surface of the furnace body 1 in order to forcibly heat the water in the lower space 5 by the high-heat furnace body 2.

Since such a snow melting device has been widely used recently in a snowfall area, its structure tends to be complicated year by year for the purpose of improving snow melting efficiency and other purposes. For example, circulation and reuse of heated snowmelt water (so-called shower method).

[0005]

By the way, in the case of the burner flame type snow melting apparatus, the chimney 6 which inevitably discharges the combustion exhaust gas fed into the furnace body to the outside air is inevitable. Because, the furnace body 2 of the snow melting device needs to be designed as small as possible in view of the device cost and the construction cost when burying it underground. Under such conditions, no matter how large the furnace body 2 is designed, the heating time is insufficient to completely burn the combustion flame generated in the burner device 3, and the exhaust gas must be discharged as so-called incomplete combustion. Because there was not.

There are many problems associated with incomplete combustion of burner flames. For example, the snow around the snow-melting device becomes black and stains, deteriorating the landscape and polluting surrounding houses. For this reason, in recent underground buried snow melting devices, the length of the chimney 6 is increased to suppress smoke generation as much as possible, or the exhaust gas is forcibly blown to the snow to be melted, and smoke is removed as much as possible. Take a structure to suppress the generation.

However, when using the chimney, not only the storage structure becomes complicated, but also the size of the device becomes large. Further, in the method of blowing the exhaust gas to the snow to be melted, the structure is likely to be complicated and the device cost is likely to be increased, such as providing a large number of exhaust tubes for the blowing.

Therefore, an object of the present invention is to completely burn the burner exhaust gas with a compact device structure and eliminate the need for spraying or a chimney.

[0009]

In order to achieve the above object, a snow melting apparatus according to the present invention is a snow melting apparatus for arranging a furnace body inside a case body and discharging a burner flame into an internal space of the furnace body. As a technical premise, one half or more of the inner wall surface of the furnace body is formed into a substantially plane arc shape, and a substantially cylindrical red hot plate is provided in the vertical direction on the upper surface of the furnace body, and the outer peripheral portion of the red hot plate is provided. Equipped with an exhaust opening and a large number of small holes in the red hot plate.
Further, a shield plate having a diameter equal to or larger than the diameter of the exhaust opening may be arranged in the horizontal direction on the upper end of the red heat plate.

[0010]

In the snow melting apparatus according to the present invention, since the substantially cylindrical red heating plate is arranged on the furnace body having the curved surface formed on the inner wall surface, the burner flame is a furnace having an arc shape and a substantially circular red heating plate. Guided by the inner wall surface of the body, it orbits the inner space of the furnace body. Like the conventional snow melting device, the flame is emitted from one end of the furnace body and exhausted from the other end, not so-called one-way exhaust, but the circulation time of the combustion gas is extended by orbiting the inside of the furnace body. Earn the time required for complete combustion.

On the other hand, the red hot plate is provided with a large number of small holes. As a result, the burner flame heats the red hot plate to a high temperature,
At the same time, it becomes possible to completely burn the combustion gas. This is because the burner flame released from one end of the furnace body into the inner space of the furnace body enters inside from the lower opening of the substantially cylindrical red hot plate and escapes from the small hole to the outside of the red hot plate during circulation. However, as a result of this phenomenon being constantly repeated, the red hot plate itself is exposed to a high-temperature burner flame and heated to a temperature similar to that of the combustion gas.

On the other hand, most of the combustion gas completely burns by contacting the red hot plate heated at a high temperature while circulating in the furnace. Of course, there may be a combustion gas with a short circulation time, and there may be a combustion gas that cannot sufficiently reburn because the circulation orbit is far from the red hot plate. However, in the structure of the present invention, the combustion gas escapes to the outside through the exhaust opening provided on the outer peripheral portion of the red hot plate. At this time, the combustion gas must pass near the red hot plate which is heated at a high temperature. In this way, all the combustion gas circulating in the furnace body is completely burned by the high-temperature heated red hot plate, and is exhausted with almost no smoke.

Incidentally, the process of heating the red hot plate at a high temperature is actually more complicated. Not only does the combustion gas in the circulation enter inside from the lower opening of the red hot plate and escape to the outside through the small holes, but also the gas flow that enters from the small holes to the inside and escapes to the outside from the lower opening or other small holes. Because it exists,
These act in combination to heat the red hot plate.

As described in claim 2, when a shielding plate having a diameter equal to or larger than the diameter of the exhaust opening is horizontally arranged at the upper end of the red heat plate, rainwater, dust, snow thrown, etc. are exhausted. It can be prevented from entering the furnace body through the opening for use. Further, since the high-temperature exhaust gas hits the back surface of the shielding plate and flows in the lateral direction, it becomes possible to quickly melt the snow (snow thrown) in the vicinity of the shielding plate.

[0015]

1 and 2 are views showing an embodiment of a snow melting apparatus according to the present invention. The snow melting apparatus according to the present invention has a case body 11 having an appropriate shape, for example, a substantially square plane.
The furnace body 21 is housed inside, and the burner device 20 is arranged at one end of the furnace body 21.

A substantially cylindrical red heating plate 31 is arranged on the upper surface of the furnace body 21, and a constant gap 3 is provided on the outer peripheral portion of the red heating plate 31.
6 is provided and the exhaust pipe 37 is provided. A shield plate 40 having a diameter slightly larger than the outer diameter of the exhaust pipe 37 is provided at the upper end of the red heat plate 31.

Reference numeral 12 denotes an upper panel of the case body 11, 14
Is an inlet for the snowmelt water provided in the corner of the top panel 12,
Reference numeral 15 is a water storage space formed on the lower side of the furnace body 21, and 16 is a water storage space formed on the outer peripheral portion of the furnace body 21. In addition, 17 is
It is an independent water storage space defined by a partition plate 18. The water storage space 17 is communicated with the water storage space 15 or / and 16 on the main body side through an opening provided at an appropriate position. The internal water (warm water heated by contact with the furnace body 21) can be discharged to an appropriate place, for example, from a drain port 19 provided at the upper part. A part of the water may be discharged to the drain, but it is preferably circulated and reused as a hot water shower via a pump. Since the technique of shower snow melting of snow-melting water by arranging pipe passages is widely known, the structure downstream of the drain port 19 will be omitted. The structure of each part will be specifically described below.

In the present embodiment (FIGS. 1 and 2), the case body 11 is designed to have a smaller vertical dimension as compared with the left / right / depth dimension. This is to realize a so-called snow melting machine that can be placed on the ground.

Conventionally, the underground buried type snow melting apparatus, which has been widely used in snowfall areas such as Hokkaido, can be designed relatively freely in the height dimension, but in the stationary snow melting apparatus, when the height dimension is increased, It interferes with snow melting work. This is because it becomes difficult to throw in snow. However, since the snow melting apparatus according to the present invention can also be an underground buried type, the ratio between the left / right / depth dimension and the vertical dimension is not particularly limited.

The furnace body 21 is provided with an opening 22 for guiding the combustion gas generated in the burner device 20 to the inside, and the inner wall surface of the portion near the opening 22 is made smooth (generally L-shaped in plane). The other portion, especially the inner wall surface on the side facing the opening 22 is formed in an arc shape. Furnace body 2 according to this embodiment
In No. 1, approximately 1/3 of the inner wall surface was formed into an arc shape.

The snow melting device according to the present embodiment is suitable for use as a so-called stationary type, and the case body 1
1 is molded comparatively compactly, so the furnace body 21
Is preferably designed to be large enough to come into contact with the inner peripheral surface of the case body 11. In the present embodiment, the three surfaces other than the opening 22 side for the burner device are designed to have a size that substantially contacts the inner surface of the case body 11. Of course, when the case body 11 is sufficiently large, a large gap may be formed between the inner wall of the case body 11 and the outer wall of the furnace body 21. The vertical dimension of the furnace body 21 is also the same. In this embodiment, the furnace body 21 is stepped up and down to a position quite close to the bottom surface of the case body 11. This is because the larger the furnace body 21, the higher the combustion efficiency and the heat exchange rate for heating the snowmelt water.

The upper surface of the furnace body 21 (which is preferably left open) is in contact with the upper surface panel 12. The top panel 12 is a partition plate that serves as a pedestal for melting the snowfall. Since the heat of the furnace body 21 is directly transferred to the upper panel 12, the upper panel 12 is at a high temperature during operation and instantly melts the snow and ice. The melted water (snow melting water) flows into the water storage spaces 15 to 17 from the water intake 14. When the upper surface of the furnace body 21 is opened, the upper panel 12 is
Also serves as the upper lid of the furnace body 21.

The red hot plate 31 is arranged substantially in the center of the upper surface of the furnace body 21. Since the upper panel 12 is provided on the furnace body 21, the red hot plate 31 is naturally installed so as to penetrate the upper panel 12. It is preferable that the red hot plate 31 has a substantially cylindrical shape, and the lower end portion thereof is arranged so as to reach, for example, about 1/3 to 1/2 of the inner vertical dimension of the furnace body 21. If there is not a certain depth or more, it becomes difficult to secure the circulating fluidity of the combustion gas ejected from the burner device 20, while if it is too deep, the combustion gas flowing from the lower end opening into the internal space of the red hot plate 31 Because it is not possible to secure enough.

The outer diameter of the red hot plate 31 is preferably about 1/4 to 1/2 of the inner diameter of the furnace body 21, for example. If the outer diameter of the red hot plate 31 is too large compared to the internal space of the furnace body 21, it may hinder the free flow of the combustion gas, and if it is too small, the function of guiding the circulating flow of the combustion gas will be impaired. Is.

A large number of small holes 32 are provided in the red hot plate 31. The small holes 32 ensure that the combustion gas freely flows inside and outside the cylindrical red hot plate 31. The high temperature heating of the red hot plate 31 is realized by the free flow of the combustion gas through the small holes 32. Incidentally, if the small holes (32) are not provided, the combustion gas cannot flow freely, so the temperature of the red hot plate 31 does not rise so much, and it is difficult to promote complete combustion of the combustion gas (smoke is emitted).

The small hole 32 is preferably circular. This is because the molding is easy and the gas fluidity is good. The diameter is preferably about 1 to 3 cm, for example. This is because if it is too small, the fluidity of the combustion gas deteriorates, and it becomes difficult to realize the circulation flow of the combustion gas.

Exhaust pipe 37 provided on the outer peripheral portion of the red hot plate 31.
Discharges the combustion gas inside the furnace body 21 to the outside air. Therefore, the inner diameter of the exhaust pipe 37 is larger than the outer diameter of the red hot plate 31, and there is a gap 36 having a constant size therebetween.

It is sufficient that the exhaust pipe 37 is located above the upper panel 12, and it is not necessary to project it into the furnace body 21. This is because the combustion gas tends to flow upward (outside air) through the outer peripheral surface of the red hot plate 31, so that the exhaust pipe 37 does not need to guide the combustion gas inside the furnace body.
The base end of the exhaust pipe 37 can be fixed to the upper panel 12. On the other hand, the red hot plate 31 is fixed to the exhaust pipe 37 and the upper panel 12 via an appropriate holding member. An appropriate number of legs may be provided and supported on the bottom surface of the furnace body.

The shield plate 40 arranged on the upper end of the red heat plate 31 is
Prevents dust from entering the inside of the furnace body 21 through the gap 36,
In addition, it escapes the rising combustion gas in the lateral direction, which serves as a support means for melting the surrounding ice and snow. The outer diameter of the shielding plate 40 may be slightly larger than the outer diameter of the exhaust pipe 37. If it is too big, it will interfere with snow throwing work,
For example, it is designed to be larger than the exhaust stack 37 by about 5 to 10 cm. Since the function of the snow melting device according to the present invention (complete combustion of combustion gas) can be realized without providing the shielding plate 40, a cap having an appropriate shape for sealing the gap 36 is provided instead of the shielding plate 40. May be.

Therefore, according to the snow melting device having such a structure,
The combustion gas ejected from the burner device 20 into the furnace body 21 has a cylindrical red heating plate 31 and an arc-shaped furnace body 21.
It is guided by the inner wall surface of the and is given a rotational motion. As a result, the combustion gas can stay in the inner space of the furnace body 21 for a relatively long time, while the red hot plate 31 in which the free flow of the hot gas injected by the burner device 20 is guaranteed is heated to a high temperature. It is possible to completely burn the combustion gas that comes into contact with this.

As a result, due to the pressure difference between the inside and outside, the gap 36
Most of the combustion gas that passes through and escapes to the outside air is reheated (completely burned) by the red hot plate 31 in advance during the circulating flow,
Combustion gas that tries to escape to the outside air without receiving it also passes through the gap 36 in the upstream and downstream stages of the red hot plate 3
Compulsory contact with 1 to ensure complete combustion (reheat combustion)
Be given the opportunity to do so. Therefore, the combustion gas discharged from the gap 36 to the outside air is converted into almost smoke-free clean gas.

It should be noted that the inner peripheral surface of the furnace body 21 may be formed with grooves or irregularities for making the flow of the circulating circulation of the combustion gas smoother. Further, the upper panel 12 and the upper surface of the furnace body may be separated from each other.

[0033]

As described above, according to the snow melting apparatus of the present invention, the burner exhaust gas can be reheated and completely burned by the compact device structure, and the blowing and the chimney can be eliminated.

[Brief description of drawings]

FIG. 1 is a diagram illustrating an internal structure of a snow melting device according to the present invention.

FIG. 2 is a diagram illustrating the structure of a snow melting device according to the present invention from a plane.

FIG. 3 is a diagram illustrating a conventional general snow melting device.

[Explanation of symbols]

11 case body 12 Top panel 14 Intake 15, 16, 17 Water storage space 20 burner equipment 21 furnace body 22 Opening (for burner equipment) 31 red hot plate 32 small holes 36 gap 37 Exhaust stack 40 Shield

Claims (2)

[Claims] 1. In a snow melting apparatus in which a furnace body is arranged inside a case body and a burner flame is emitted into the inner space of the furnace body, 1/2 or more of the inner wall surface of the furnace body is formed into a substantially arcuate plane shape. On the other hand, a snow melting device characterized in that a substantially cylindrical red hot plate is provided in the vertical direction on the upper surface of the furnace body, an exhaust opening is provided in the outer peripheral part of the red hot plate, and a large number of small holes are provided in the red hot plate. . 2. The snow melting device according to claim 1, wherein a shield plate having a diameter equal to or larger than the diameter of the exhaust opening is arranged in the horizontal direction on the upper end of the red heat plate.