JP3188970B2 - Discharge device for artificial snow mountain in flat area - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for discharging snowmelt water from an artificial snow mountain deposited and formed in a snow dumping site provided on a flat ground in an urban area or its suburbs without polluting the environment, or for cooling. The present invention relates to a discharge device for flatland artificial snowy mountains that can be used as energy.

[0002]

2. Description of the Related Art In urban areas, removed snow is transported by truck to particularly recognized rivers and discarded. However, there is a problem that transportation costs increase in a large area such as Sapporo City. In addition, since there is a shortage of snow dumps on rivers where snow can be dumped in a year with a large amount of snowfall, the elimination of snow is carried out in vacant lots that are relatively easy to transport on flat ground, and the snow is accumulated in the state of artificial snow mountains and naturally melted. Snow melting water is discharged into existing drains, gutters, and small and medium rivers.

[0003]

However, discharging snowmelt water directly to drains, gutters or rivers has the following problems. Firstly, snowmelt water is low-temperature water close to 0 ° C. If such low-temperature water flows into small and medium-sized rivers even in summer when the water temperature is rising, the temperature of the water body into which the snowmelt water has flowed decreases, and inhabiting occurs. Have a significant impact on the ecosystem of flora and fauna. Second, various types of garbage and small garbage
There is a problem that foreign matter such as fine dust is mixed in, and the foreign matter flows into drains, gutters or small and medium-sized rivers, thereby contaminating the river and the surrounding environment. There is also a problem that the water gradually accumulates, and the drainage property is impaired, causing overflow.

[0004] Further, when the artificial snow mountain snow melting method is adopted for flat areas, there are the following problems. In other words, when there is a large amount of rainfall during the period when the temperature rises, the amount of snowmelt water increases rapidly because the snowmelt of the artificial snow mountain is accelerated by the precipitation temperature, exceeding the outflow ability of small and medium-sized rivers, drains, waterways. There is a danger of flooding, flooding or flooding in flat areas.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and does not change or destroy the river that releases snowmelt water and its surrounding environment, and does not affect the ecosystem of animals and plants. No risk of flooding, flooding, or flooding in flat areas can be prevented, and snowmelt water can be used as a refrigerant at low cost to store fresh food, or used as agricultural water for plant cultivation. It is an object of the present invention to provide a discharge device for flatland artificial snowy mountains that can be used.

[0006]

Means of the present invention configured to solve the above-mentioned problems are formed on a flat area,
There is a snow dumping area with a sedimentation surface inclined so that snowmelt water flows down, and a sludge sedimentation section for sedimenting dust in the snowmelt water.
And is used to store snowmelt water flowing from the deposition surface
The water collecting tank is provided to be located downstream of the accumulation surface of the snow dump, and a water discharge means for discharging snowmelt water in the water collecting tank to an external drainage receiving area.

The water collecting tank is provided with a dust removing tank for removing foreign matter mixed in the snowmelt flowing down from the accumulation surface, thereby preventing the foreign matter from staying in the water collecting tank and draining water. Reduce the load on the water pump and prevent river pollution.

By installing a sludge discharge pump in the water collecting tank, minute dust accumulated at the bottom of the water collecting tank can be removed.

The drainage means is a snowmelt water discharge means for discharging the snowmelt water in the water collecting tank to a river, so that the danger of overflow, flooding or flooding in a flat portion can be prevented.

By providing a water pressure attenuating tank in a flow path connecting the water collecting tank and the river, the influence on the flow and the riverbed of the river can be minimized.

[0011] By making the drainage means a refrigerant supply means for supplying the snowmelt water in the water collecting tank to the cold water utilization facility, the snowmelt water can be effectively used.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the figure, 1 indicates a snow dump. The snow dump 1 is for transporting and depositing snow removed from roads and the like in an urban area to make it into an artificial snow mountain and allow it to be naturally melted. The snow dump 1 is a flat area A having almost no water gradient. By embankment work, excavation work, or a combination of both works, the upper surface is formed as a necessary water gradient on a sedimentary surface 1A that is inclined in one direction at an inclination angle of about 1%, and the surrounding area is a jetty.
B, a waterproof sheet 2 is laid under the accumulation surface 1A to prevent snowmelt water from penetrating into the ground.

[0013] In order to temporarily store the snowmelt water which melts and flows down when the artificial snow mountain B formed and deposited on the deposition surface 1A is located at the downstream side of the deposition surface 1A in the snow dumping area 1. Shows the water collection building. The water collection building 3 is installed on the ground, and has a shed 4 composed of a floor 4A, a wall B, and a roof 4C having a waterproof function, and a concrete water collection tank 5 buried underground.
It consists of: The shed 4 is an electric instrument room for accommodating power receiving and distribution devices and various instruments. The water collecting tank 5 has a stepped bottom 5A and an opening 5B extending over the shed 4.
Are formed, a front wall 5C, a rear wall 5D opposed to the front wall 5C, and a pair of side walls 5E and 5E (not shown). In the water collecting tank 5, the bottom of the bottom 5A on one side is defined by a sludge sedimentation section 7 and the pump chamber 8 is defined on the other side by a partition wall 6 suspended from 4A.

A numeral 9 denotes a half of the deposition surface 1 from the opening 5B.
A and a dust removing tank protrudingly installed in the water collection building 3, wherein the dust removing tank 9 is a box-shaped tank body 10 having a bottom part and four walls, and one side wall part of the tank body 10. , An outlet 12 formed in the other side wall portion, a large-diameter removing wire mesh 13 having a hole diameter of about 30 mm provided in the inlet 11, and a hole diameter provided in the outlet 12 having a diameter of about 30 mm. And a wire net 14 for removing a small diameter of 3 mm. And the dust removal tank 9
With the above-described configuration, among the large and small trash mixed in the snowmelt flowing down the sedimentation surface 1A, the trash having a size larger than about 30 mm is first removed by the large-diameter wire mesh 13, and the size is reduced. Is 30 mm or less, and the dust having a specific gravity larger than 1 is settled in the tank body 10, and only the floating dust having a size smaller than about 3 mm and a specific gravity smaller than 1 overflows into the water collecting tank 5 through the small-diameter removing wire mesh 14. It is made to flow.

Numeral 15 denotes a snowmelt water discharging means for discharging the snowmelt water overflowing from the dust removing tank 9 and flowing into the water collecting tank 5 to the small river C side. Reference numeral 16 denotes a drainage pump which constitutes the snow melting water discharge means 15, and the drainage pump 16
And a suction pipe 16B connected to the drain pump 16 via a dust removal filter 16A
And project into the water collecting tank 5. Reference numeral 17 denotes a drain pipe connected to the discharge port of the drain pump 16, and the drain pipe 1
Numeral 7 is buried and buried at a depth of about 1.2 m or less from the ground surface in consideration of the freezing of snowmelt water to be discharged and impact resistance from the ground.

A drain pipe 17 is located in the pump chamber 8.
Is a liquid level sensor for detecting the liquid level in the water collecting tank 5. The liquid level sensor 19 is connected to the flow rate control valve 18 and the discharge pump 16 via signal lines, respectively. The flow control valve 18 is opened and closed according to the amount of water retained in the water collecting tank 5, and the drain pump 16 is stopped when the flow control valve 18 decreases to a predetermined amount.

Further, reference numeral 20 denotes a water pressure attenuation tank which is formed of a concrete water tank and is connected to the downstream side of the drain pipe 17. The water pressure attenuating tank 20 communicates with the small river C via the water discharge channel 21, and attenuates the water pressure of the drainage pumped by the drain pump 17 and discharges the water to the small river C to thereby reduce the small river C.
It does not affect the flow of rivers and the riverbed, maintains the current state of the small river C, and preserves the waterside ecosystem.

Reference numeral 22 denotes a snow melting water return pipe whose base end is connected to the middle of the drainage pipe 17 and whose front end is located above the accumulation surface 1A of the snow dumping ground 1. An opening / closing valve 23 is provided in the snowmelt water return pipe 22 so that a part of the discharged snowmelt water is returned to the snow throwing place 1 and sprinkled on the accumulation surface 1A. Thereby, the melting of the artificial snow mountain B is promoted to increase the amount of snowmelt water, the amount of snowmelt water supplied to the low-temperature storage 27 described later is increased, or the cooling temperature of the low-temperature storage 27 is reduced to a desired temperature. Can be reduced.

Next, reference numeral 24 denotes a refrigerant supply means arranged in parallel with the snow melting water discharge means 15. 25 is the refrigerant supply means 24
The water supply pump 25 is installed in the pump chamber 8 like the drainage pump 16, and the suction pipe 25B connected to the water supply pump 25 via the dust removal filter 25A is inserted through the partition wall 6. It is projected into the water collecting tank 5. Reference numeral 26 denotes a water pipe connected to the discharge port of the water pump 25. The water pipe 26 is also buried in the ground like the drain pipe 17. Reference numerals 27, 27, 27 denote low-temperature storages that use snowmelt water as cooling water, and the water pipes 26 are connected to the low-temperature storages 27 via branch pipes 26A. In addition,
In addition to the low-temperature storage 27, snowmelt water may be used as agricultural water for cultivation of wasabi using cold water.

Further, reference numeral 27 denotes a sludge water retaining section 7 in the water collecting tank 5.
1 shows a sludge suction pump for discharging sludge staying in a tank. The sludge suction pump 27 connects the suction pipe 27A to the partition wall 6.
The sludge water sucked by the sludge suction pump 27 is disposed at the lowermost portion of the pump chamber 8 in a state of protruding into the sludge water retaining section 7 from the sludge collection tank 7 (not shown).
To be released.

In the figure, D is a ditch or a flowing channel that merges with the small river C, E is a river with which the small river C merges, and a gutter F is installed at the junction of the small river C.

The present embodiment is as described above. The artificial snow mountain B formed by the snow dumped in the snow dumping ground 1 melts as the outside air temperature rises, becomes snowmelt water, and becomes the accumulation surface 1A.
Flows down into the dust removal tank 9. At this time, large dust mixed in the snow melting water is removed by the large-diameter removing wire net 13. Among the refuse having passed through the large-diameter removing wire net 13, dust having a specific gravity greater than 1 settles in the refuse removing tank 9. And
Floating dust having a specific gravity smaller than 1 and dust that has not been settled out of the dust removing tank 9 and the water collecting tank 5 through the small-diameter wire mesh 14 together with the snowmelt water. In the water collecting tank 5, dust having a specific gravity larger than 1 stays in the sludge sedimentation section 7 in a sludge state, so that the sludge suction pump 27 is appropriately operated and discharged to the outside.

When the amount of snowmelt flowing into the water collecting tank 5 reaches a predetermined amount, the discharge pump 16 is operated by a signal from the liquid level sensor 19 and is sent to the water pressure attenuation tank 20 through the discharge pipe 17 and discharged to the small river C. Is done. Part of the snowmelt water discharged from the discharge pipe 17 is guided to the snowmelt water return pipe 22 by opening the on-off valve 23 as necessary, and is sprayed on the deposition surface 1A.
Further, the water supply pump 25 of the refrigerant supply means 24 is started,
The snowmelt water is supplied to the low-temperature storage 27 via the water pipe 26 to maintain the inside of the storage 27 at a desired temperature, so that the snowmelt water is used for low-temperature storage of fresh food.

[0024]

The present invention has the following advantages because it is constructed as described above. (1) Snowmelt water is automatically stored in a water collection tank by forming an inclined sedimentary surface at a snow dump , and sludge is collected in the water collection tank.
Since the snowmelt water with the heavy dust deposited and stored in the sedimentation section is discharged to the drainage receiving area by the drainage means,
Disasters such as flooding, flooding or flooding in flat areas with extremely low water gradients can be prevented. Also, snowmelt water
Changes in rivers and their surrounding environment due to pollution
Or destroy, or even affect the ecosystem of flora and fauna.
I will not give it . (2) Since a trash removal tank is installed in the water collecting tank to remove foreign substances mixed in the snowmelt water , the pollution of the river by the snowmelt water ,
Changes in surrounding environment and destruction, fauna and flora ecosystem
Influences and clogging of drains, etc.
Can be reliably prevented . (3) A sludge discharge pump is installed in the water collecting tank to collect sludge in the water collecting tank and prevent sludge from accumulating in drains, gutters, rivers, etc. as much as possible. Can prevent flood danger. (4) Since the snowmelt water is guided from the water collection tank to the water pressure attenuation tank and then discharged to the river, the flow of the river and the riverbed are not affected. (5) The snowmelt water discharged from the snow dump is used as a psychic medium for storing selected products or as agricultural water for plant cultivation, etc., which significantly reduces storage costs and water usage fees. be able to.

[Brief description of the drawings]

FIG. 1 is a plan view showing the entire configuration of a water discharging device for an artificial snow mountain on a flatland according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a main part of the water discharge device for an artificial snowy mountain on a flat ground.

FIG. 3 is a partially enlarged view of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Snow dump 1A Sedimentation surface 5 Water collecting tank 9 Dust removal tank 15 Snow melting water discharge means 20 Water pressure attenuation tank 24 Refrigerant supply means 27 Sludge suction pump

Continuation of the front page (56) References JP-A-4-124335 (JP, A) JP-A-61-274024 (JP, A) JP-A-6-17454 (JP, A) Jpn. , U) Japanese Utility Model Showa 50-96365 (JP, U) Japanese Utility Model Showa 63-151585 (JP, U) Japanese Utility Model Showa 63-161921 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB Name) E03F 1/00 E03B 3/30

Claims (6)

(57) [Claims] 1. A formed on the flat portion, and搬雪dumps with tilted deposition surface so meltwater flows down, snow melting water
A sludge sedimentation section for sedimenting dust is defined inside,
A water collecting tank installed on the downstream side of the sedimentation surface of the snow dump to store the snowmelt water flowing from the sedimentation surface, and a drainage tank for discharging the snowmelt water in the water collection tank to an external drainage receiving area. A discharge device for an artificial snowy mountain in a flat area, comprising a water discharge means. 2. The discharge device according to claim 1, wherein the water collecting tank is provided with a dust removing tank for removing foreign matters mixed in the snowmelt flowing down from the accumulation surface. 3. The discharge device for an artificial snowy mountain in a flat area according to claim 1, wherein a sludge discharge pump is installed in the water collecting tank. 4. The water discharge means for discharging snow melt water in the water collecting tank to a river.
The release device for an artificial snowy mountain according to the above description. 5. The discharge device according to claim 4, wherein a water pressure attenuation tank is provided in a flow path connecting the water collecting tank and the river. 6. The discharge device for a flat ground artificial snow mountain according to claim 1, wherein said drainage water supply means is a refrigerant supply means for supplying snowmelt water in said water collecting tank to a cold water utilization facility.