JPH10317342A - Snow melting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance snow melting efficiency through the effect of a shower by keeping the shower while draining water and to increase serviceability by automating shower operation and drainage. SOLUTION: A snow-melting cylinder having a heating means and a drainage pump 30 draining snowmelt to the outside of a snow-melting vessel embedded in the ground are placed in the snow melting vessel. A snowmelt level detecting means B, a shower pump 23 pumping up the snowmelt and ejecting it from the top of the snow melting vessel 1, and a control part controlling the drive of the shower pump 23 and the drainage pump 30 according to the level detected by the level detecting means are also included.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buried snow melting apparatus.

[0002]

2. Description of the Related Art Conventionally, a snow melting tank provided with an openable and closable lid at an upper opening is buried in the ground, and a snow melting cylinder provided with a burner device and a pump for draining snow melting water are housed in the tank. There is a buried type snow melting device installed.

[0003] With this configuration, when snow is put into the snow melting tank, the snow melts due to the heat of the snow melting cylinder, and the melted snow melting water is forcibly drained to a sewage ditch outside the tank by a pump.

Some of such snow melting apparatuses include a shower pipe in the snow melting tank which is connected to the pump via an on-off valve in order to improve the snow melting efficiency.

[0005] Such a shower pipe is generally disposed along the peripheral side of the snowmelt tank, and can blow snowmelt water toward the snow in the tank. It can melt snow in a short time.

[0006]

However, in the snow melting apparatus having the above structure, the pump is shared between the drainage and the shower, so that only the drainage can be performed at the time of drainage, and only the shower can be performed at the time of shower. The snowmelting time used tended to be short, and the snowmelt efficiency could not be greatly improved.

Further, in order to switch between the drainage and the shower, the user must operate the opening / closing valve each time, and the usability is extremely poor.

Further, since the shower pipe provided in the conventional snow melting tank is provided only on the peripheral side of the snow melting tank,
It hardly functions to cool the snow melting cylinder, and the snow melting cylinder may be overheated.

An object of the present invention is to provide a snow melting apparatus which can solve the above-mentioned problems.

[0010]

According to a first aspect of the present invention, there is provided a snow melting tank buried under the ground, a snow melting cylinder provided with a heating means, and a snow melting water provided outside the tank. A snow-melting device provided with a drain pump for draining water to the snow-melting water, a means for detecting the water level of the snow-melting water, a shower pump for pumping up the snow-melting water and ejecting it from the upper part of the snow-melting tank, and a water level detected by the water-level detecting means. And a controller for controlling the driving of the shower pump and the drain pump based on the above.

[0011] Therefore, snow melting by the shower and forced drainage to the outside can be automatically performed according to the amount of snow melting water.
The snow melting efficiency due to the shower effect is improved, and the usability can be significantly improved.

Further, in the present invention according to claim 2, the water level detecting means is constituted by a float attached to each of the drain pump and the shower pump, and the drain pump is installed at a certain height above the shower pump, When the water level reaches a predetermined pump driving height, the shower pump is driven, and when the water level further rises to the predetermined height, the drain pump is driven.Furthermore, by driving the drain pump, the water level reaches a predetermined pump stop height. When descending, the drainage pump was controlled to stop.

Therefore, the water level detecting means has a simple structure and can be manufactured at low cost, and in spite of the simple structure, the driving of the drain pump and the shower pump can be reliably controlled according to the detected water level. Moreover, when the water level in the pump chamber reaches a predetermined height, snow melting by the shower is always continued, so that the snow melting efficiency can be improved and the snow melting work time can be shortened.

Further, in the present invention according to claim 3, the shower pipe is disposed on the peripheral side and the center of the snow melting tank.

Therefore, the snow melting efficiency is improved, and the cooling effect of the combustion chamber is enhanced, so that the combustion chamber can be prevented from overheating. In addition, since the shower pipe is arranged in the center of the snow melting tank, the safety fence can be enhanced because the fence can also be used.

[0016]

DETAILED DESCRIPTION OF THE INVENTION A snow melting apparatus according to the present invention has a snow melting tank provided with a heating means and a drain pump for draining snow melting water to the outside of the tank in a snow melting tank buried underground. An apparatus, a water level detecting means of snowmelt water, a shower pump for pumping up the snowmelt water and spouting from the upper part of the snowmelt tank, based on the water level detected by the water level detecting means,
And a control unit for controlling the driving of the shower pump and the drain pump.

That is, the snow-melting tank can be buried in the ground, and is formed in a box shape with an upper opening in which a snow-melting chamber for housing and disposing a snow-melting cylinder and a pump chamber for housing and disposing a drainage pump and a shower pump are formed. At the same time, the snow melting room and the pump room are communicated with each other so that the snow melting water from the snow melting room can be stored in the pump room. Then, a water level detecting means is provided in the pump chamber so that the water level of the snow melting water can be detected. An open / close lid is attached to the upper opening of the snow melting tank.

It is preferable that the control unit for controlling the start and stop of the driving of the shower pump and the drain pump is arranged so as not to come in contact with snow or water as much as possible during the snow melting operation performed in the open state. A control room can be formed in the snow melting tank by partitioning and housed, and the cover can be closed so that snow and water do not enter the control room.

Further, a burner device having a sufficient thermal power for rapidly melting the snow put into the snow melting chamber is attached to the snow melting cylinder disposed in the snow melting chamber as heating means.

Further, a snow sensor is provided in the snow melting room, and the sensor and the control unit are communicated with each other. When the snow sensor detects that snow has been thrown into the snow melting room, the burner device is detected based on the detection signal. It is good to be constituted so that it may drive. The form of the snow sensor is not limited as long as it can detect the input of snow.

When snow is thrown into the snow-melting chamber of the snow-melting apparatus having the above-described structure, the snow sensor detects this and the burner device is driven, the snow in contact with the snow-melting cylinder is melted, and the melted water flows into the pump chamber. .

When the water level rises, based on the water level detected by the water level detection means, the control unit first drives the shower pump to increase the snow melting efficiency, and when the amount of the snow melting water further increases and reaches the predetermined water level, the control unit next starts. Drives the drain pump to perform the shower and drain simultaneously.

The amount of snow in the snowmelt chamber is reduced, or
When the amount of drainage exceeds the amount of snowmelt, the amount of water stored in the pump chamber decreases and the water level falls. When the water level reaches a predetermined level, the drainage pump is stopped to suppress further reduction in the amount of water storage.

Accordingly, the amount of water stored in the pump chamber gradually increases with time, and when the water level reaches a predetermined level, the drain pump is driven again to discharge the snowmelt water out of the tank. During this time, since the shower pump continues to be driven, it is possible to always maintain high snow melting efficiency.

As described above, when the snow-melted water melted by the snow-melting cylinder reaches a predetermined water level in the pump chamber, the drainage is repeated at an optimum timing while continuing showering until the work is completed. .

Further, the above-mentioned water level detecting means can be constituted by a float attached to each of the drain pump and the shower pump.

That is, a float is connected to the drain pump and the shower pump, a water level is detected at the height of the float, and the detected value can be input to the control unit instead of an electric signal. A drain pump is installed at a certain height above the shower pump, the shower pump is driven when the water level reaches a predetermined pump driving height, and the drain pump is driven when the water level further rises to the certain height, When the water level is lowered to a predetermined pump stop height by driving the drain pump, the drain pump is controlled to stop.

With this configuration, the difference in the installation height between the two pumps becomes the difference in the drive timing of each pump as it is, and the water level can be easily detected and the drive control of both pumps can be performed with a simple configuration. .

Further, it is desirable that the shower pipes are arranged on the peripheral side and the center of the snow melting tank. In other words, shower water can be sprayed over the entire inside of the snow melting tank, so that the snow melting efficiency is improved, and the cooling effect of the combustion chamber is enhanced, so that the combustion chamber can be prevented from being overheated.

Further, by disposing the shower pipe in the center of the snow melting tank, the safety fence can be enhanced because it can be used also as a protective fence.

[0031]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings.

FIGS. 1 to 5 show a snow melting apparatus A according to this embodiment.
Is shown.

The snow melting apparatus A is a snow melting tank 1 buried underground.
Inside, a snow melting section 2 and a drain section 3 for draining the snow melted in the snow melting section 2 are housed and arranged, and buried in a garden or the like of a general house in a cold region or the like, and the accumulated snow is accumulated. Is poured into the snow melting tank 1 to forcibly melt it and drain it into the sewer so that snow can be removed.

First, the overall structure of the snow melting tank 1 will be described.

The snowmelt tank 1 according to the present embodiment is made of metal and is formed in a substantially rectangular box with an upper opening as shown in FIG. The pump chamber 14 is formed by being dropped.

That is, as shown in FIGS. 1 and 2, the snow melting tank 1 is formed such that the bottom surface 10 has a downward slope from one short side to the other short side. , The first partition wall 4 is erected at a fixed interval from one short side,
A second partition wall 5 is erected at the other end of the shorter side of the boundary with the pump chamber 14, and the inside of the snow melting tank 1 is firstly separated by the first and second partition walls 4,5. The chamber 11 is divided into a chamber 11, a second chamber 12, and a third chamber 13, and the pump chamber 14 is provided below the third chamber 13 so as to protrude downward. Reference numerals 11c and 13c denote inner lids provided above the first chamber 11 and the third chamber 13, respectively.

As shown in FIGS. 1 to 4, the third chamber 13 is divided into a front space 13a and a rear space 13b by a third partition wall 7, and the front space 13a and the pump chamber 14 are separated from each other. The rear space 13b and the pump chamber 14 communicate directly with each other by cutting off the bottom surface 10 of the snow melting tank 1 while communicating with each other through a communication hole provided in the bottom surface 10 of the snow melting tank 1. Reference numeral 6 denotes a strainer provided in the communication hole.

Further, a square opening 50 and a rectangular opening 51 are provided in the second partition wall 5, a snow melting tube 20 described later is provided, and the second room 12 and the front space 13a forming a snow melting room are connected to each other. Square opening
The second room 12 (snow melting room) and the rear space 13
and b are communicated through the rectangular opening 51. Here, 50a is a lattice body attached to the square opening 50, and 51a is a punching metal attached to the rectangular opening 51.

Therefore, between the second chamber 12 as a snow melting chamber for generating snow melting water and the pump chamber 14, the second chamber 12 → the square opening 50 → the front space 13a → the communication hole (strainer 6) → the pump A flow path R1 flowing with the chamber 14, a second chamber 12 → a rectangular opening 51 →
The rear space 13b → the sub flow path R2 flowing with the pump chamber 14 is formed.

An L-shaped flange 15 is provided around the upper peripheral side of the snow melting tank 1 so that the lower part can be buried in the ground from the flange 15. An openable and closable lid 17 is attached to 16. Reference numeral 17a denotes a hinge portion of the lid 17, which is attached to the flange 15. 17b is a handle provided on the front edge of the lid 17.

As shown in FIG. 5, between the lid 17 and the snow melting tank 1
As shown in FIG. 7, the lid 17 can be easily opened and closed by interposing the damper device 8. 17d is a lid stopper for regulating the standing posture of the lid 17.

As shown in FIG. 1 and FIG. 5, the damper device 8 is disposed in a damper cover 17c connected to the end of the lid 17 on the side of the first chamber 11, so that snow to be thrown in when the lid is opened is removed. It does not contact the damper device 8.

Next, the snow melting section 2 will be described.

As shown in FIGS. 1 to 4, the snow melting part 2 includes a snow melting cylinder 20 having a rectangular body 20a and a roof part 20b having a substantially triangular shape in a side view, in a second chamber 12 serving as a snow melting chamber. And a burner device 21 as heating means is connected to one end surface of the snow melting cylinder 20 via the first partition wall 4. That is, the burner device 21 is disposed in the first chamber 11 of the snow melting tank 1 described above. Note that F is a burner fan attached to the burner device 21.

Next, the drain section 3 will be described.

As shown in FIG. 3 and FIG.
A drain pump 30 is disposed in the pump chamber 14, a drain pipe 31 is extended upward from the pump 30, and the tip 31a is exposed to the outside through the side wall of the snow melting tank 1 from the middle, and the snow melts into sewage or the like. Can be forcibly drained.

As shown in FIGS. 2 and 3, a natural drainage port 32 is provided continuously on the side of the front space 13a of the third chamber of the snow melting tank 1 so as to have a rectangular shape from the second chamber 12 serving as the snow melting chamber. Part of the snowmelt flowing into the front space 13a through the opening 50 is a natural drain.
It will be drained outside from 32. On the other hand, the front space 13
Most of the snowmelt water in a is filtered through the above-described strainer 6 and accumulated in the pump chamber 14, and is forcibly drained by the drain pump 30.

The configuration of the snow melting apparatus A having the above-described configuration, which is a feature of the present invention, will be described below.

In the snow melting apparatus A according to the present invention, a snow melting cylinder 20 and a drainage pump 30 are provided in the snow melting tank 1 described above. A shower pump 23 for pumping up and spouting from the upper part of the snow melting tank 1 to promote snow melting, and a control unit C for controlling the driving of the shower pump 23 and the drain pump 30 based on the water level detected by the water level detecting means B. Are provided.

Further, the water level detecting means B is constituted by a float B1 attached to each of the shower pump 23 and the drain pump 30, and the drain pump 30 is installed above the shower pump 23 by a certain height H. When the water level reaches a predetermined pump driving height, the shower pump 23
, The drain pump 30 is driven when the water level further rises to the predetermined height H, and the drain pump 30 is further driven by driving the drain pump 30 so that the drain pump 30 is stopped when the water level falls to a predetermined pump stop height. It also has a feature in doing it.

That is, as shown in FIG. 2 and FIG. 3, a central pipe 22a which passes through the center of the upper opening 16 near the lower side of the upper opening 16 of the snow melting tank 1, and extends along the periphery of the opening. A shower pipe 22 comprising a peripheral pipe 22b is provided, and a base end of the shower pipe 22 is connected to the pump chamber.
A shower pump 23 dedicated to the shower arranged in front of the drainage pump 30 in 14 is connected to the shower pump 23 so as to improve the snow melting efficiency.

Reference numeral 22c denotes a large number of ejection holes provided at a predetermined pitch in the shower pipe 22.

In particular, since the central pipe 22a is provided,
The shower water can be sprayed over the entire snow melting tank 1 and the snow melting efficiency is improved, and the cooling effect of the combustion tube 20 can be obtained. Therefore, the combustion efficiency can be increased and the durability of the combustion tube 20 can be increased. .

Further, the center pipe 22a cooperates with a protective fence 42 described later to prevent humans and animals from falling into the snow melting tank 1.

As shown in FIG. 2, the water level detecting means B has a float B1 attached to each of the drain pump 30 and the shower pump 23, detects the height of the float B1, and converts the detected value into an electric signal. Instead, the CPU is configured to be able to input to the control unit C having a memory and the like.
30 is installed at a fixed height H above the shower pump 23. Reference numerals 23a and 30a denote handle portions of both pumps 23 and 30, reference numeral 34 denotes a platform of the drainage pump 30, reference numeral B2 denotes a cylinder housing the float B1, and reference numeral B3 denotes a signal line communicating with the control unit C.

Therefore, when the snow melting water stored in the pump chamber 14 reaches a predetermined water level, a part thereof
It is sent to the shower pipe 22 by 23 and is blown out toward the snow thrown into the snow melting tank 1 to promote snow melting,
Further, when the water level rises to a certain height H, the drain pump 30 is driven to perform forced drainage.

As described above, in this embodiment, both pumps 23, 3
The difference in installation height between 0 (constant height H) is the same for each pump.
The difference between the drive timings of the pumps 23 and 30 makes it possible to easily detect the water level with a simple configuration and to control the drive of both pumps 23 and 30.

As shown in FIGS. 3 and 5, in the present embodiment, a control panel having a box shape is attached to the inside of the front wall in the first chamber 11 as the control section C.

Here, the characteristic configuration of the snow melting unit 2 in this embodiment will be described.

The snow melting cylinder 20 is provided with a large number of high-temperature gas outflow holes 24. In this embodiment, as shown in FIGS.
A large number of louvers 25 are provided so as to cover the outflow holes 24, and a cover 26 is provided in the high-temperature gas outflow holes 24 provided at the top of the roof 20b.

The louver 25 of the roof portion 20b excluding the top portion is
As shown in FIG. 6, it is formed so as to face downward outside the high-temperature gas outflow hole 24, and prevents the outflow hole 24 from being blocked by the snow thrown into the snow melting chamber (the second chamber 12). At the same time, the snowmelt water melted by the gas is prevented from entering the snowmelt cylinder 20, so that the combustion efficiency in the snowmelt cylinder 20 is not deteriorated.

On the other hand, a cover provided on the top of the roof 20b
As shown in FIG. 2, 26 is disposed immediately above the high-temperature gas outflow hole 24, and is formed in a hat shape in a side view. As a result, even if snow accumulates on the roof 20b of the
The high-temperature gas can directly hit the snow that has directly accumulated, without melting, and efficiently melt the snow. In addition, the melted snow can be prevented from entering the snow-melting cylinder 20.

In this embodiment, as shown in FIG.
The left and right side surfaces of the trunk 20b of the snow melting cylinder 20 are divided into a plurality of outflow hole arrangement sections 29a, 29b, and 29c according to the distance from the burner device 21, and the high-temperature gas outflow holes 24 are provided in the sections 29a, 29b, and 29c. Are provided, and the direction and the number of the high-temperature gas outlet holes 24 are set as follows for each of the sections 29a, 29b, and 29c.

That is, the plurality of high-temperature gas outlet holes 24
Outflow hole arrangement section 29c far from the burner device 21
The number of the outflow gas from the high-temperature gas outflow holes 24 provided in the outflow hole arrangement section 29c far from the burner device 21 is smaller than the number provided in the close outflow hole arrangement section 29a. The direction is directed to the burner device 21 side, and the number of the hot gas outflow holes 24 provided in the outflow hole arrangement section 29a close to the burner apparatus 21 is at least determined by the outflow hole arrangement section 29b located at the central portion. And the direction of jetting outflow gas is directed downward.

With this configuration, it is possible to prevent the outflow of the combustion gas from concentrating on the tip side of the snow-melting cylinder 20 and to improve the snow-melting ability of the burner device 21 by increasing the high-temperature gas outflow holes 24 and reducing the blowing resistance. Further, since the outflow direction from the front end side can be changed to the center side, snow can be uniformly melted on the entire side surface of the combustion tube 20, and the snow melting efficiency is improved.

Since there is no visual deviation of the snow melting, the user can be provided with a sense of security. In addition, it is possible to prevent the snow melting cylinder 20 from overheating and to suppress the thermal deformation of the snow melting cylinder 20 as much as possible. The durability can be improved.

In FIG. 1 to FIG. 4, reference numeral 27 denotes an exhaust pipe, which protrudes from the rear side surface of the snow melting pipe 20, and
The tank is connected to a tank side flue 19a provided on the back side surface 18 of the tank.

As shown in FIGS. 1 and 4, the flue 19a is in communication with a lid-side flue 19b provided substantially at the center of the lid 17 via a movable duct 9.

That is, both the flues 19a and 19b are formed in a rectangular shape in cross section. The lid side flue 19b is slightly larger than the tank side flue 19a, and the base end is closed via the hinge 90. Side flue 19
A movable duct 9 rotatably connected to b is disposed so as to be slidable on the outside of the tank side flue 19a.

Therefore, when the lid 17 is opened, the tank side flue
The lid 19a communicates with the lid side flue 19b through the movable duct 9 (see FIGS. 1 and 4). When the lid 17 is closed, the movable duct 9 slides down the outer peripheral surface of the tank side flue 19a. The lid can be closed without any trouble because it moves.

A high-temperature gas outflow hole 24 is also provided in the tank side flue 19a, similarly to the snow melting cylinder 20, and the outflow hole 24 has a smoke from the outside so as to be concave from the outside as shown in FIG. A concave louver 28 protruding into the road is provided. In the present embodiment, three rows of high-temperature gas outlet holes 24 are provided in the tank side flue 19a in the vertical direction.

With the concave louver 28, the high-temperature exhaust gas from the snow-melting cylinder 20 can be positively flown into the interior of the snow-melting chamber, and the snow-melting efficiency can be further improved. Reference numeral 27a denotes a gas outflow hole formed on the peripheral surface of the exhaust pipe 27, which also functions as a drain hole located on the lower surface side.

Next, the operation control of the snow melting apparatus A according to the present invention, in particular, the control of driving / stopping the burner apparatus 21 will be described.

As described above, the control unit C (control panel) is provided in the first chamber 11 in the snow melting tank 1, and the control unit C has the above-mentioned water level as shown in FIG. In addition to the detection means B,
A snow sensor S for detecting the introduction of snow, a limit switch LS for detecting opening and closing of the lid 17 to drive and stop the burner fan F of the burner device 21, and an emergency stop switch ES.
Has been contacted.

The snow sensor S is attached to a position where snow can be easily thrown, that is, as shown in FIG. 3, over the first chamber 11 and the second chamber 12 of the snow melting tank 1. As shown in FIG.
A lead portion S1 made of a magnetic material attached from a back surface 18 of the snow melting tank 1 via a stay 18a, and a back surface 18 of the snow melting tank 1
A contact portion S3 which is coaxially supported and integrally rotates with a pedal portion S2 whose base portion is rotatably supported, and a tip end side of the pedal portion S2 is pulled by a spring body S4. Biased to the side. S5 is a stopper for holding the pedal section S2 at a predetermined angle, and S6 is a snow melting tank 1 when the pedal section S2 receives snow.
This is a stopper for preventing the rear side surface 18 from colliding.

With this configuration, when snow is received by the pedal portion S2, the pedal portion S2 pivots downward by its weight, and
The switch is turned on when S1 and the contact point S3 overlap,
The control unit C receives the ON signal in the switch-on state, the burner device 21 is ignited, and the combustion is continued unless the ON signal is extinguished. The spring constant of the spring body S4 is appropriately determined in consideration of the amount (weight) of snow received by the pedal section S2.

As described above, since the snow sensor S is constituted by a reed switch that functions in a non-contact manner, it is possible to prevent a contact failure due to freezing even in a low-temperature atmosphere and to make the snow sensor S function reliably.

A limit switch LS for detecting the opening and closing of the lid 17 to drive and stop the burner fan F is rotatable about a base on one inner side of the snow melting tank 1 as shown in FIG. The switch body LS1 is mounted on the cover 17 and, as shown in FIG. 5, a claw piece LS2 provided at the tip of a damper cover 17c provided on the lid 17, and when the cover 17 is opened, the claw piece is opened. LS2 flips up the switch body LS1 to switch on and drives the burner fan F, while closing the lid 17, the claw piece LS2 pushes down the switch body LS1 to turn off the switch. Part C
Is the burner fan F and the burner device 21 itself,
The shower pump 23 and the drain pump 30 are turned off.

That is, the snow melting apparatus A according to the present embodiment
In a normal snow melting operation, the lid 17 is opened, the limit switch LS is turned on, the burner fan F is driven to be in a standby state, and when the snow sensor S detects the introduction of snow, the burner device 21 is ignited to melt the snow. Start the limit switch
When the limit switch LS is turned off due to the absence of snow in the pedal section S2 of the LS, the combustion is stopped, the lid 17 is closed, and the drive of the entire apparatus is stopped. Needless to say, during the snow melting work, the above-mentioned water level detecting means B automatically promotes snow melting and drainage by the shower.

Further, in this embodiment, an emergency stop switch ES is provided for emergency use. The switch ES is designed to enable quick switch operation in an emergency in consideration of the fact that many workers are right-handed. As shown in FIG. 4, it is mounted as a push button type and on the front right side of the lid 17.

The emergency stop switch ES is provided with the lid 17
When the switch ES is operated, all the functions of the snow melting device A can be stopped.

Therefore, by operating the switch ES, even if a pet or other small animal falls into the snow melting tank 1 during the snow melting work, it can be quickly rescued, and the safety is enhanced.

Next, another configuration of the snow melting apparatus A according to the present embodiment will be described.
Reference numeral denotes an oil pipe communicating and connecting a fuel tank (not shown) provided outside the snow melting tank 1 and a burner device 21. A cock D1 is provided in the middle of the oil pipe, and a snow melting device A is provided from spring to autumn.
When the is not used for a long time, the cock D1 can cut off the flow of fuel.

Reference numeral 40 denotes the cock D1 connected to the upper opening 16 of the snow melting tank 1.
The inner lid 11c provided in the first chamber 11 so that it can be operated from
And is usually closed by a lid that can be easily opened and closed.

Reference numeral 41 denotes an air intake formed on the side surface of the damper cover 17c. When the lid 17 is opened, the first chamber 11 and the outside of the tank communicate with each other through the internal space of the damper cover 17c, and the burner is opened. Fresh air is introduced into the device 21 so that the combustion state can always be kept good.

Reference numeral 42 denotes a protective fence provided at a predetermined interval in the longitudinal direction of the upper opening 16 of the snow melting tank 1, and is provided between the central pipe 22a and the peripheral pipe 22b of the shower pipe 22. ing. As described above, in the present embodiment, the provision of the central pipe 22a allows the protection fence 42 to be easily attached and the strength to be increased at low cost.

The snow melting apparatus A according to the present embodiment has the above-described configuration. First, when the lid 17 is opened, the limit switch LS is operated, and the burner fan F is driven.
When snow is thrown, the snow sensor S detects the snow being thrown, and the burner device 21 is driven to start melting snow.

When the snow melting cylinder 20 is heated and the injected snow melts, the snow melting water flows into the pump chamber 14 through the flow path R1. That is, large objects such as stones are removed by the lattice body 50a of the square opening 50 provided in the second partition wall 5, and a part is discharged to the outside of the tank by the natural drainage port 32. As a result, small impurities such as fallen leaves are removed and flow into the pump chamber 14.

It is notified to the shower pump 23 of the water level detection means B that the snowmelt water stored in the pump chamber 14 has reached a predetermined height (in this embodiment, 270 mm from the bottom of the pump chamber 14). When the attached float B1 is detected, the control unit C outputs a drive signal to the shower pump 23,
The shower water is spouted from the upper part of the snowmelting tank 1 by the operation of and the snow is melted by the water to promote the snowmelting.

When the float B1 attached to the drainage pump 30 detects that the level of the snowmelt water in the pump chamber 14 has risen to a certain height H (31 mm in this embodiment), the control unit C outputs a drive signal to the drainage pump 30, and the drainage pump 30 is operated to be forcibly drained out of the tank via the drainage pipe 31.

Eventually, when the level of the snow-melting water falls and reaches the driving stop height of the drain pump 30 (131 mm from the bottom of the pump chamber 14 in this embodiment), the driving of the drain pump 30 is stopped, but the water level is returned again. Starts to rise and the operation of driving the drainage pump 30 is automatically repeated.

As described above, when the shower pump 23 operates once, the level of the snowmelt water in the pump chamber 14 becomes
Between the drain stop height and the drain start height, and during this time, the shower pump 23 operates continuously.

Therefore, when the shower pump 23 is driven, the shower operation is performed until the operation is finished and the cover 17 is closed or the emergency stop switch ES is operated, and the snow melting per unit amount of snow is performed. Since the efficiency can always be maintained at a high level, the time for snowmelt work is significantly reduced.

When the strainer 6 is clogged during the snow melting operation, for example, the snow melting water flows through the sub-flow path R2, that is, the rectangular opening 51 formed in the second partition wall 5 to remove the strainer 6. Since the gas flows directly into the pump chamber 14 by bypass, no trouble is caused in the snow melting work. In this case, the punching metal 51a attached to the rectangular opening 51 plays the role of the strainer 6.

[0095]

The present invention is embodied in the above-described embodiment, and has the following effects.

That is, in the present invention according to claim 1,
A snow melting apparatus in which a snow melting tank buried underground is provided with a snow melting cylinder for heating and melting snow, and a drainage pump for forcibly draining the snow melting water to the outside of the tank, wherein a water level detecting means for the snow melting water is provided. ,
A shower pump that pumps up the snowmelt water and spouts it from the upper part of the snowmelt tank to promote snowmelt, and a control unit that controls the driving of the shower pump and the drain pump based on the water level detected by the water level detection unit. With such a configuration, snow melting by the shower and forced drainage to the outside can be automatically performed according to the amount of the snow melting water, so that the snow melting efficiency by the shower effect is improved and the usability can be significantly improved.

In the present invention according to claim 2, the water level detecting means is constituted by a float attached to each of the drain pump and the shower pump, and the drain pump is installed at a certain height above the shower pump, When the water level reaches a predetermined pump driving height, the shower pump is driven, and when the water level further rises to the predetermined height, the drain pump is driven.Furthermore, by driving the drain pump, the water level reaches a predetermined pump stop height. By controlling the drain pump to stop when it descends, in addition to the above effects, the water level detecting means has a simple configuration and can be manufactured at low cost. In addition, despite the simple configuration, the driving of the drainage pump and the shower pump can be reliably controlled according to the detected water level, and when the water level in the pump chamber reaches a predetermined height, snow melting by the shower always continues. Therefore, the snow melting efficiency can be improved and the snow melting time can be shortened.

Further, according to the third aspect of the present invention, the shower pipe is disposed on the peripheral side and the central part of the snow melting tank, so that the snow melting efficiency can be improved and the cooling effect of the combustion chamber can be improved. As a result, the combustion chamber can be prevented from being overheated, and its combustion efficiency and durability can be increased. In addition, the shower pipe arranged in the center of the snowmelt tank can also serve as a protective fence, so safety is improved, and by connecting another protective fence to this pipe, the strength is increased, which is advantageous in terms of cost. Become.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a snow melting tank of a snow melting apparatus according to the present embodiment.

FIG. 2 is an explanatory view of the snow melting device in a front view.

FIG. 3 is an explanatory view of the snow melting apparatus in plan view.

FIG. 4 is an explanatory view of the snow melting apparatus as viewed from the right side.

FIG. 5 is an explanatory diagram of the snow melting device as viewed from the left side.

FIG. 6 is an explanatory diagram of a louver provided on a roof of a snow melting cylinder.

FIG. 7 is an explanatory view of a concave louver provided in a flue of a snow melting apparatus.

FIG. 8 is a control block diagram of the snow melting apparatus.

FIG. 9 is an explanatory diagram of a snow sensor of the snow melting apparatus.

[Explanation of symbols]

 A Snow melting device B Water level detecting means B1 Float C Control unit (Control panel) 1 Snow melting tank 2 Snow melting unit 3 Drainage unit 20 Snow melting cylinder 23 Shower pump 30 Drain pump

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tadahisa Michibata 3351-8 Oya, Umi-cho, Umi-cho, Kasuya-gun, Fukuoka Inside the Umi Plant of Showa Iron Works Co., Ltd. 3351-8 Oya, Showa Iron Works Co., Ltd., Umi Factory

Claims (3)

[Claims] 1. A snow melting apparatus comprising a snow melting tank (1) buried underground, a snow melting cylinder (20) provided with a heating means, and a drain pump (30) for draining snow melting water outside the tank. And a shower pump (23) for pumping up the snowmelt water and ejecting it from the upper part of the snowmelt tank (1).
And a controller (C) for controlling the driving of the shower pump (23) and the drain pump (30) based on the water level detected by the water level detecting means (B). 2. The drain pump (30) and the shower pump (2).
3) The water level detecting means (B) is constituted by the float (B1) attached to each, and the drainage pump (30) is installed at a certain height (H) above the shower pump (23), and the water level is set in advance. When the set pump drive height is reached, the shower pump (23) is driven, and when the water level further rises to the certain height (H), the drain pump (30) is driven, and further, by driving the drain pump (30), 2. The snow melting apparatus according to claim 1, wherein the drain pump (30) is controlled to stop when the water level falls to a predetermined pump stop height. 3. A shower pipe according to claim 1, wherein said shower pipe is disposed on a peripheral side and a central part of said snow melting tank.
The snow melting apparatus according to claim 1.