JP2000096532A - Snow-melting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent freezing of melted-snow water in a feed water pump, to reduce running cost, and to save the time required for boiler control while decreasing an installation space by working a snow melting tank as a rainwater storage tank in combination. SOLUTION: A feed water pump 5 pumping up melted-snow water is disposed at a place capable of being dipped in melted-snow water 13 in a snow melting tank 1 buried in a ground. The feed water pump 5 supplies a water sprinkler 7 mounted to an upper section in the snow melting tank 1 with melted-snow water 13. Hot-water pipes 2 heating melted-snow water 13 are fitted onto the bottom section of the snow melting tank 1. A drain pipe 14 draining melted-snow water 13 is connected at the place of the front penetration depth or less of water in the snow melting tank 1. The snow melting tank 1 is worked as a rainwater storage tank in combination, and an orifice piping 18 draining rainwater collected in the snow melting tank is coupled with the lower section of the snow melting tank. A sluice valve 19 adjusting the discharge of drainage of rainwater collected in the snow melting tank 1 is installed to the orifice piping 18.

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 snow dropped in a snow melting tank buried underground and draining it to sewage.

[0002]

2. Description of the Related Art Conventionally, in an area with a large amount of snow, in order to dispose of a large amount of snow removed, snow may be melted by a snow melting device. The following is an example of the snow melting device.

That is, a snowmelt tank is buried underground,
A water-absorbing pipe for sucking snow-melting water is provided in the snow-melting tank. The water absorption pipe is connected by a pipe to a water supply pump provided in a separate room from the snow melting tank. Snowmelt water sucked up from the water suction pipe by the water supply pump is heated by a boiler provided in the same space as another room where the water supply pump is provided. Then, the water is supplied through a pipe to a water sprinkler provided above the snow melting tank. The sprinkler melts the snow by applying warm water to the snow dropped into the snow melting tank. When a predetermined amount of snowmelt water accumulates in the snowmelt tank, it is drained to sewage by a drain pipe connected to the snowmelt tank.

[0004]

However, in the prior art, since the water supply pump for sucking snowmelt water is provided in a separate room from the snowmelt tank, the snowmelt water sucked by the water supply pump is not always heated by the boiler. In some cases, snowmelt water in the water supply pump and pipes connected to the water supply pump may freeze. If the snowmelt water in the water supply pump or the snowmelt water in the piping connected to the water supply pump freezes, the water supply pump and the piping will be damaged, making it impossible to supply hot water to the sprinkler and dropping it into the snowmelt tank. You will not be able to melt the snow that has fallen. Further, once the water supply pump or the like is damaged, the function of the equipment cannot be restored. Therefore, even when hot water is not supplied to the water sprinkler, the boiler must always be operated, so that there is a problem that running costs are increased and that it takes time to manage the boiler.

On the other hand, snowmelt water collected in a snowmelt tank buried underground is heated by a boiler because the surrounding soil surrounding the snowmelt tank and the snow accumulated on the upper part of the snowmelt tank serve as a heat insulating material. There is a fact that it is hard to freeze without doing it.

When the snow melting tank is large, there is no example in which the snow melting tank also serves as the rain water adjusting tank, and the rain water adjusting tank must be provided separately from the snow melting tank. There was a problem that an installation space was required.

Therefore, the present invention provides a water supply pump for sucking snowmelt water at a position where it can be immersed in snowmelt water collected in a snowmelt tank, so that the snowmelt water in the water supply pump can be supplied without heating by a boiler. So that it does n’t freeze,
The present invention aims to reduce running costs, save labor for managing boilers, and reduce installation space by using a snowmelt tank as a rainwater storage tank.

[0008]

In order to achieve the above object, a snow melting apparatus according to the present invention has a snow melting tank capable of storing dropped snow buried in the ground, and a snow melting water stored in the snow melting tank. A water supply pump for pumping the snowmelt water is provided at a position where it can be immersed in the water. The water supply pump supplies the snow melting water to a water sprinkling device that is provided above the snow melting tank and melts the dropped snow. At the bottom of the snow melting tank, a heating device for heating the snow melting water stored in the snow melting tank is provided. A snowmelt water drainage pipe for draining the snowmelt water stored in the snowmelt tank is connected to a position below the freezing depth of the water in the snowmelt tank. The snowmelt tank also serves as a rainwater storage tank for storing rainwater, and a rainwater drain pipe for draining rainwater collected in the snowmelt tank is connected below the snowmelt tank. The rainwater drainage pipe is provided with a drainage amount adjusting device capable of adjusting a drainage amount of rainwater accumulated in the snow melting tank.

According to the present invention having such a configuration, the snowmelt water in the water supply pump does not freeze,
The running cost can be reduced, the trouble of managing the boiler can be saved, and the installation space can be reduced by using the snow melting tank also as the rainwater storage tank.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of a snow melting apparatus according to the present invention will be described with reference to the drawings.

As shown in FIG. 1, a rectangular box-shaped snow melting tank 1 is embedded in the ground. A heat insulating material 11 is attached to an inner wall above the snow melting tank 1 so that warm air in the snow melting tank does not escape. An opening / closing lid 12 is provided on the upper wall of the snowmelt tank 1 so that snow from which snow has been removed can be dropped from the lid.

At a substantially central portion of the side wall of the snow melting tank 1, a drain hole for the snow melting water 13 accumulated in the snow melting tank is formed, and a drain pipe 14 is connected to the drain hole. The drainpipe 14 drains outside when a predetermined amount or more of the snowmelt water 13 accumulates in the snowmelt tank 1. Since the drain pipe 14 is disposed at a depth deeper than the depth at which the water freezes, the snow melting water 13 accumulated in the snow melting tank 1 does not freeze.

The bottom of the snowmelt tank 1 is made of cinder concrete 15, that is, lightweight concrete using a coal shell as an aggregate.
A hot water pipe 2 for heating 3 is buried. The hot water pipe 2 is made of a resinous pipe, and the antifreeze circulates in the pipe.

The hot water pipe 2 is annularly connected to a heat source unit 4 provided in another room by a hot water circulation path 3 having a circulation pump 31. The hot water circulation path 3 returns the antifreeze heated by the heat source unit 4 to the hot water pipe 2 via the circulation pump 31 to the hot water pipe 2, and returns the antifreeze liquid deprived of heat by the snow melting water or the like to the heat source unit 4. Hot water return piping 33
It is composed of A bypass pipe 34 is connected to the hot water outlet pipe 32 on the discharge side of the circulation pump 31. At the junction of the bypass pipe 34 and the hot water return pipe 33, a mixing valve 35 is provided. The mixing valve 35 mixes the hot water from the bypass pipe 34 and the hot water return pipe 33, and adjusts the bypass amount of the bypass pipe so that the temperature of the hot water returned to the heat source unit 4 becomes equal to or higher than a predetermined temperature. . A thermostat 36 is attached to the mixing valve 35, and controls the mixing valve 35 so that the temperature of the hot water flowing in the hot water pipe 2 is about two degrees higher than the freezing temperature of the water. An expansion tank 37 is provided between the mixing valve 35 and the heat source unit 4.

At the bottom of the snow melting tank 1, there is provided a water supply pump 5 for sucking up the snow melting water 13 accumulated in the snow melting tank. The water supply pump 5 also plays a role of sucking up and discharging mud and the like accumulated at the bottom of the snow melting tank 1. Water supply pump 5
A screen 16 is provided in the upper part of the, so that the water supply pump does not suck the snow. A pipe 51 is connected to the water supply pump 5, and extends from the heat source device 6 to the ceiling of the snow melting tank 1.

A plurality of sprinklers 7 are attached to a pipe 51 provided on the ceiling of the snow melting tank 1. Sprinkler 7
The snowmelt water 13 sucked up by the water supply pump 5 and warmed by the heat source device 6 is sprinkled on the snow 17 dropped into the snowmelt tank 1. The water supply pump 5 is operated by operating an operation switch (not shown), so that water can be sprinkled.

The heat source unit 6 heats the pipe 51 by the pipe 61. The pipe 61 is the hot water outgoing pipe 32 described above.
And the hot water return pipe 33. A thermostat 62 is attached to the connection between the pipe 61 and the hot water outflow pipe 32, and automatically adjusts the temperature of the hot water in the pipe to a constant temperature.

A drain hole is formed in the side wall of the snow melting tank 1 located on the side of the water supply pump 5, and an orifice pipe 18 is connected to the drain hole. Orifice piping 18
Is provided with a plate-shaped partition wall having a hole of a predetermined shape in the middle of the pipe, so that rainwater can blow out from the hole. In the middle of the orifice pipe 18,
A gate valve 19 for adjusting the flow rate of rainwater accumulated in the snow melting tank 1 is provided. The gate valve 19 is fully opened when the snowmelt tank 1 is used as a rainwater storage tank.

Next, the operation of the present embodiment will be described. The snow 17 dropped into the snow melting tank 1 is melted by the snow melting water 13 heated by the hot water pipe 2 in which the hot water circulates. The snow 17 dropped into the snowmelt tank 1 is further efficiently melted by the snowmelt water 13 sucked up by the water supply pump 5 and heated by the heat source device 6 being sprinkled by the sprinkler 7.

When the operation of dropping snow into the snowmelt tank 1 is not performed, the snowmelt water 13 is heated by the hot water pipe 2 through which hot water flows about two times higher than the freezing temperature of the water. The snowmelt water 13 accumulated in the snowmelt tank 1 is at a depth deeper than the depth at which the water freezes, and the snow 17 on the upper part of the snowmelt water serves as a heat insulating material.
Is also heated so that it is about two degrees higher than the freezing temperature of water, so it does not freeze. For this reason,
The water supply pump 5 provided in the snow melting water 13 does not freeze.

In the present embodiment, since such a configuration is employed, the snowmelt water in the water supply pump does not freeze,
The running cost can be reduced and the trouble of managing the boiler can be saved. Further, since the snowmelt tank is also used as a rainwater storage tank, it is not necessary to provide a rainwater storage tank separately from the snowmelt tank, and the installation space can be reduced.

In the above-described embodiment, the snowmelt water 13 sucked up by the water supply pump 5 is heated by the heat source device 6 and then sent to the water sprinkling device 7, but it is not always necessary to heat it by the heat source device. Instead, the snowmelt water may be supplied to the sprinkler directly from the water supply pump.

Further, it is not always necessary to provide the hot water pipe 2 at the bottom of the snow melting tank 1. Further, the water supply pump 5 does not necessarily need to be provided at the bottom of the snow melting tank 1 and may be installed at any position as long as it can be immersed in the snow melting water accumulated in the snow melting tank.

Although only the charging lid 11 is provided on the upper wall of the snow melting tank 1, a groove or the like in which rainwater can fall into the snow melting tank may be formed in addition to the charging lid. Grooves, etc.
In winter, keep it closed with a lid so that warm air inside the snowmelt tank does not escape. During periods other than winter, the grooves and the like are kept open so that rainwater flows into the snow melting tank.

In the above-described embodiment, the snow melting tank 1
In order to adjust the flow rate of rainwater accumulated in the orifice pipe 18, a gate valve 19 was provided in the middle of the orifice pipe 18. However, a pump may be provided instead of the gate valve to adjust the flow rate of rainwater. .

Next, a second embodiment will be described. In the second embodiment, a water temperature sensor 8 and a control device (not shown) are added to the first embodiment.
Hereinafter, the same configuration as the first embodiment will be omitted and described.

As shown in FIG. 2, a water temperature sensor 8 is provided at a position where the water temperature sensor 8 can be immersed in the snow melting water 13 accumulated in the snow melting tank 1. The water temperature sensor 8 detects the temperature of the snowmelt water stored in the snowmelt tank 1, and is electrically connected to the control device. The control device is electrically connected to the feedwater pump 5, and is also connected to the mixing valve 35.

Next, the operation of the present embodiment will be described. When the water temperature sensor 8 detects that the temperature of the snowmelt water 13 accumulated in the snowmelt tank 1 is higher than the freezing temperature of the water by 2 degrees or more, it is assumed that all the snow in the snowmelt tank has melted. The water temperature sensor sends information to the control device, and the control device stops the operation of the water supply pump 5. When the water temperature sensor 8 has transmitted information that the temperature of the snowmelt water stored in the snowmelt tank 1 has approached the freezing temperature of the water, the control device controls the mixing valve 35 to control the inside of the hot water pipe 2. Increase the temperature of the flowing hot water.

In the present embodiment, the water spray of the water spray device 7 is automatically stopped because of such a configuration, and the labor for operating the water spray device can be saved. In addition, by controlling the temperature of the hot water circulating in the hot water pipe 2 by the control device, the snow melting water 13 in the snow melting tank can be automatically controlled so as not to be higher than the freezing temperature of the water by 2 degrees or more. it can.

Note that the water temperature sensor 8 is not necessarily
It is not necessary to provide at a position where it can be immersed in the snow melting water 13 accumulated in the orifice, and it may be attached to a gate valve 19 provided in the middle of the orifice pipe 18.

Further, a gate valve may be provided in the middle of the drain pipe 14, and the water temperature sensor 8 may be attached to the gate valve. Further, the set temperature of the water temperature sensor 8 does not necessarily need to be set to a temperature higher than the freezing temperature of water by 2 degrees or more, and may be higher or lower.

[0032]

As described above, according to the present invention, the snow melting water in the water supply pump does not freeze, so that the running cost can be reduced and the trouble of managing the boiler can be omitted. Also, there is no need to provide a rainwater storage tank separately from the snowmelt tank, and the installation space can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing a second embodiment.

[Explanation of symbols]

 Reference Signs List 1 snow melting tank 13 snow melting water 14 drain pipe (snow melting water drain pipe) 17 snow 18 orifice pipe (rainwater drain pipe) 19 gate valve (drainage adjusting device) 2 hot water pipe (heating device) 5 water supply pump 7 water sprinkler

Claims (1)

[Claims] 1. A water supply pump for burying a snowmelt tank capable of storing dropped snow and immersing it in snowmelt water stored in the snowmelt tank, and for pumping the snowmelt water. The water supply pump is provided above the snow melting tank,
The snow melting water is supplied to a water spraying device for melting the dropped snow, and a heating device for heating the snow melting water stored in the snow melting tank is provided at the bottom of the snow melting tank, and the water in the snow melting tank is frozen. At a position below the depth, a snowmelt water drainage pipe for draining the snowmelt water stored in the snowmelt tank is connected, and the snowmelt tank also serves as a rainwater storage tank for storing rainwater. Connecting a rainwater drainage pipe for draining rainwater collected in the snowmelt tank, wherein the rainwater drainage pipe is provided with a drainage amount adjusting device capable of adjusting a drainage amount of rainwater collected in the snowmelt tank. Snow melting equipment.