JP3764379B2 - Water storage / snow melting tank - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a water storage / snow melting tank that is buried and used underground.
[0002]
[Prior art]
In areas where there is a lot of snowfall, such as Hokkaido and Tohoku, recently underground snowmelt tanks are used to handle winter snowfall. Unlike the so-called snow melting device that melts snow for a short time by forced heating using a flame burner device before that, by preparing a relatively large water storage tank and slowly heating the water in the water storage tank It melts snow that has been removed over time.
[0003]
The forced heating type snow melting device using a burner device has the advantage that it can melt a large amount of snow in a short time, but it tends to clog the circulation pump path with dust such as dead leaves mixed during snow removal. There are difficulties. On the other hand, a snow melting tank that melts snow over time only needs to have a simple electric heating type heater device, and has a very simple structure. Moreover, there is no problem of clogging of garbage, and there are various advantages such as the running cost can be surely reduced by using electric power at night and night, and maintenance is less complicated. For this reason, a snow melting method in which snow is slowly melted over time, rather than forced snow melting by a burner flame, has recently become particularly preferred.
[0004]
Conventionally, such a water storage / snow melting tank is often molded into concrete. This is because concrete molding is the easiest way to create a bowl-shaped water tank that can withstand earth pressure and other natural conditions after being buried underground.
[0005]
The weight of the water storage / snow melting tank is also an important design condition. This is because when a light-weight water tank with a hollow interior is buried underground, and when unscheduled underground water or groundwater is generated, the water storage / snow melting tank is buried in the buried ground due to the buoyancy of water. Because it breaks up and rises. For this reason, resin-made water storage / snow melting tanks that do not use concrete have been prevented from floating by, for example, connecting and fixing the water storage / snow melting tank to the ground using, for example, a number of wire ropes. .
[0006]
[Problems to be solved by the invention]
Molding the water storage / snow melting tank has more advantages than using a concrete bowl-shaped tank, considering the reduction in manufacturing cost and transportation cost, if the difficulty of lifting due to low weight is excluded.
[0007]
However, in order to prevent floating due to the influence of groundwater and underground water, it is not negligible in terms of workability and installation cost that the water storage / snow melting tank is towed and fixed to the ground via a rope such as a wire rope. It produces results that impose various burdens on the user. In addition, the low weight also leaves concerns about the reliability and safety of the future.
[0008]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to increase the weight of a resin water storage / snow melting tank without increasing the cost and to surely prevent lifting.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a water storage / snow melting tank according to the present invention comprises a base end part and a tank body defined by a wall part stacked above or inside the base end part. After the tank body is spatially isolated from the tank body in a state where communication can be controlled via an on-off valve, a pump device is arranged at the base end, and water assembled by the pump device is transported and discharged to the inside of the tank body. While the pipe material to be arranged is arranged, at least the wall portion constituting the tank body of the base end part and the tank body has a double structure, and an appropriate load means is arranged in the internal space having the double structure. As the loading means, it is desirable to use a test piece of a concrete structure (a specimen used for a compressive strength test or the like).
[0010]
The outer diameter of the base end may be designed to be larger than the outer diameter of the tank body (claim 3). A water intake opening for taking in soil water may be provided on the upper surface and / or the side surface of the panel material constituting the base end (claim 4).
[0011]
[Action]
The water storage / snow melting tank according to the present invention includes a base end portion and a tank main body configured by stacking on the base end portion (or an inner portion). The base end and the tank body are spatially separated. The base end part temporarily stores water and feeds it into the tank body through a pump device in which an appropriate amount is disposed and a pipe member connected to the pump.
[0012]
The water stored at the base is supplied by rainwater, groundwater (underflow water), and in some cases, water supply. On the other hand, the water stored in the tank body is supplied from the base end via the pump device.
[0013]
In order to secure at least the dead weight of the tank body, the wall portion constituting the tank body has a double structure, and an appropriate load means is disposed in the wall. For example, a cylindrical concrete piece. Of course, a load means may be arranged at the base end.
[0014]
The wall portion constituting the tank body is stacked in multiple stages, and is designed to have a vertical dimension that facilitates the placement or supply of the solid material or fluid cement as the load means. By using multi-stage stacking, the manufacturing, transportation, and installation of the wall portion are facilitated at each stage. Further, by adjusting the volume (space volume) of the double structure of the wall, or by selecting the material of the load means that fills the inside, it is possible to give a weight capable of reliably suppressing the lifting.
[0015]
The water storage / snow melting tank according to the present invention has a two-layer structure with a base end and a tank main body, and the water in the tank main body that ultimately serves various purposes is provisionally supplied to the base end. This is because the supply source of water can be freely selected according to the environment by obtaining from the stored water. That is, the water stored in the base end may be filtered rainwater that has been passed through the soil, underground water (underflow water), or tap water depending on the use environment. Aside from tap water, clean water such as rainwater and underground water (underflow water) that has passed through the soil is difficult to obtain from a place close to the ground, so it is located at the base end located at a certain depth or below. This necessitates temporary storage. The clean water stored in the base end portion in this way is sent to the tank body by a pump device (and a pipe member connecting the pipe device and the tank body) arranged in the base end portion.
[0016]
If the outer diameter of the base end is designed to be larger than the diameter of the outer diameter of the tank body, the upper surface of the base end protrudes outward from the wall surface of the tank body. It becomes possible to take filtered rainwater from the upper surface.
[0017]
The intake of water temporarily stored in the base end is not limited to the upper surface of the base end. This is because when abundant groundwater reaching the side depth of the base end is taken in, groundwater can be taken from the side of the base end. In any case, when taking the natural water in the soil other than tap water into the base end, it is desirable to provide an appropriate filter means at the water intake at the base end to prevent the inflow of dust.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a diagram showing an embodiment of a water storage / snow melting tank according to the present invention. The water storage / snow melting tank 10 includes a base end portion 11 installed at the deepest portion, and a tank body 20 stacked on the base end portion 11.
[0019]
The base end portion 11 is for temporarily storing water for feeding into the tank body 20. In this embodiment, as shown in FIG. 2, the internal space of the base end portion 11 is divided into three by partition walls 12 and 13. S1 is a first tank, S2 is a second tank, and S3 is a pump chamber. S4 is a space for disposing the filtration unit (55), but this space S4 is not always necessary. This is because the filtration unit to be arranged at the lowermost end of the tank body 20 can have an appropriate structure. However, an opening / closing valve 14 </ b> B for communicating the base end portion 11 and the tank body 20 is provided at an appropriate place. This on-off valve 14B is used when draining the tank body 20 during cleaning.
[0020]
The base end portion 11 is provided with on-off valves 12B and 13B on the partition walls 12 and 13 that partition the pump chamber S3 so that the water stored in the first tank S1 and the second tank S2 can be sent to the pump chamber S3 at an appropriate time. It is arranged. A pump device 17 and an electric heater device 18 for heating water are arranged in the pump chamber S3. Although not shown, the inner space of the base end portion 11 is subjected to a structural treatment such as providing an appropriate reinforcing structure for resisting earth pressure, for example, providing a rib structure on the inner wall surface of the space.
[0021]
Reference numeral 51 denotes a pipe that guides and discharges water pumped by the pump device 17 to the upper portion of the tank body 20. Reference numeral 55 denotes a filtration unit (dust filter). In this embodiment, a space S4 formed at the center of the base end portion 11 is used, and a conical net material joined at the base portion is used. However, the shape of the filtration unit 55 is not particularly limited. When the two apexes of the substantially conical net material are used in the vertical direction as in this embodiment, they fit well in the deformed substantially circular space S4 formed in the center of the base end portion 11, and dust The collection efficiency of dead leaves etc. is also good.
[0022]
The space ratio between the first tank S1 and the second tank S2 is free. In this embodiment, the space ratio between the first tank S1 and the second tank S2 is, for example, 1: 2. It is desirable that the first tank S1 and the pump chamber S3 have the same volume.
[0023]
As far as the essential function is concerned, the partitioning by the partition walls 12 and 13 is not necessarily an absolute condition. This is because the space of the base end portion 11 only needs the pump device 17 when used as a water storage tank, and only needs the pump device 17 and the heater device 18 when used as a snow melting tank. Since this embodiment arrange | positions the heater apparatus 18, it has illustrated the case where it uses as a snow melting tank.
[0024]
The division of the internal space of the base end portion 11 by the partition walls 12 and 13 is mainly for adjusting the amount of water when heating the water by the heater device 18. The snow melting efficiency is improved when a small amount of water is heated rather than when a large amount of water is uniformly heated by one heater device 18. Therefore, especially when used as a snow melting tank, it is more effective to divide the internal space of the base end portion 11 into a plurality of parts.
[0025]
The tank body 20 is constructed using a stacked wall unit 21. For example, as shown in FIG. 3, the wall unit 21 has an external shape that has a ring shape as a whole, and the wall portion has a double structure. Further, it is desirable to provide fitting irregularities (not shown) that can be fitted to each other on the upper surface and the lower surface so that the upper and lower stages can be easily stacked. The shape of the fitting unevenness may be designed freely. It is desirable that the wall unit has 21 bottoms and is covered with a bottom. Reinforcing materials (such as ribs) are provided at appropriate intervals inside the double structure.
[0026]
Appropriate load means is provided in the internal space S5 of the wall unit 21 having a double structure. The load means is not limited to a type such as a metal material or a concrete material, but preferably a concrete structure or a test piece for civil engineering is used. The test piece has a constant dimensional standard, excellent structural strength, and high specific gravity. For example, an architectural test piece has a cylindrical shape with an upper and lower sides of 20 cm and an outer diameter of 10 cm, and the weight is 3.6 kg / average. Since there is almost no error in the shape and weight, the size of the internal space of the wall unit 21 having a double structure can be formed in accordance with the size of the test piece. In other words, it is desirable that the vertical dimension is a dimension allowing for a certain margin of 20 cm, and the width dimension is a dimension allowing for a certain margin of 10 cm (preferably 1 cm or less).
[0027]
Since the wall unit 21 itself is a resin-molded donut-shaped ring material, it is lightweight and can be stacked easily. It goes without saying that you can do it manually. On the other hand, the test piece as the load means arranged on the stacked wall unit 21 has an average weight of 3.6 kg, so that it can be easily carried and arranged on the wall unit 21 manually. However, the weight of each wall unit 21 in which a large number of test pieces are arranged and filled becomes very heavy. Therefore, the tank body 20 (water storage / snow melting tank 10) that becomes a sufficiently heavy structure cannot be lifted by soil water such as underground water. Further, since the hard test pieces can be filled and arranged sufficiently densely, there is almost no possibility that the resin wall surface constituting the wall unit 21 is damaged by the earth pressure action.
[0028]
In the present embodiment, the base end portion 11 is configured to be larger than the outer diameter of the tank body 20, and the sea sand layer 41 reaching the ground surface G or a position near the ground surface G is formed on the upper surface 19 of the base end portion 11. Provide. The sea sand layer 41 surrounds the outer periphery of the tank body 20. The sea sand layer 41 guides, for example, rainwater or underground water onto the upper surface 19 of the base end portion 11, and enters the first tank S <b> 1 and the second tank S <b> 2 through openings T provided at appropriate locations on the upper surface 19. Operates the function of storing water. 44 is a waterproof sheet which partitions general soil and sea sand (41).
[0029]
Therefore, according to such a structure, the water taken in and stored in the base end portion 11 from the ground surface or soil through the sea sand layer 41 is appropriately sent to the pump chamber S3 through the on-off valves 12B and 13B, and the pump It can be fed into the tank body 20 via the device 17 and the pipe 51. When used as a snow melting device, the water that has flowed into the pump chamber S3 is heated to an appropriate temperature by the heater device 18, and the heated water is sent to the tank body 20 through the pump apparatus 17 and the pipe 51, and the ice and snow inside the tank body is sent. Melt. It is desirable to discharge water (overflow) exceeding the capacity of the tank body 20 from the tank body 20 to the outside (such as a sewage ditch) via a discharge pipe 58, for example.
[0030]
Since the tank body 20 can be easily stacked and can secure a sufficient weight by filling the test pieces (P), the installation work is extremely simple and speedy, and the largest of the resin molded products that are lifted by the influence of underground water. Difficulties can be resolved with certainty. Since each part can be manually laid out with lightweight materials, the installation cost can be reduced to each level compared to conventional large concrete molded products and rope pulling methods.
[0031]
In addition, the arrangement | positioning location of the pipe 51 is not ask | required. In FIG. 1, the wall unit 21 is illustrated so as to be disposed using the inside of the double space, but it is needless to say that the wall unit 21 may be disposed outside the tank body 20.
[0032]
Of course, the water stored in the base end portion 11 is not limited to rain water and underground water, and tap water may be used. Which one to choose depends on the natural environment conditions of the installation location. In snowfall areas such as Hokkaido, if underground water can be used, it can be used, but it is difficult to secure winter water in areas where underground water cannot be expected. Therefore, at least during the winter, tap water may have to be used. On the other hand, in areas such as Okinawa where rainwater and underground water can be expected at all times, it is not necessary to consider the use of tap water, and the water pumped into the tank body 20 using natural cycle water is used for various purposes such as flush toilets. It can be used for industrial water, laundry water, automobile washing water, etc.
[0033]
In the above description, the base end portion 11 has a single structure, but it is a matter of course that an appropriate means for increasing the load, for example, a concrete test piece may be filled in the double structure.
[0034]
In the above description, the structure in which the wall unit 21 is stacked on the base end portion 11 is shown. However, as shown in FIG. 4, the base end portion 11 is formed in a donut shape, and the tank body 20 is stacked in the central space. It doesn't matter.
[0035]
【The invention's effect】
As described above, according to the resin water storage / snow melting tank according to the present invention, it is possible to increase its own weight without increasing the cost and to surely prevent lifting.
[Brief description of the drawings]
FIG. 1 is a side cross-sectional equivalent view illustrating a water storage / snow melting tank according to the present invention.
FIG. 2 is a plan view illustrating a base end portion according to the invention.
FIG. 3 is a perspective view illustrating a wall unit according to the present invention.
FIG. 4 is a view showing another structural example of the water storage / snow melting tank wall according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Water storage / snow melting tank 11 Base end part 12, 13 Partition 12B, 13B, 14B On-off valve 17 Pump apparatus 18 Heater apparatus 19 Upper face 20 of base end tank main body 21 Wall unit 41 Sea sand layer 44 Waterproof sheet 51 Pipe 55 Filtration Unit (dust filter)
S1 First tank S2 Second tank S3 Pump chamber S4 Filtration unit (55)
S5 Interior space G of the wall unit Ground surface

Claims (4)

A water storage / snow melting tank made of resin with the tank body buried underground,
It consists of a base end and a tank body formed by stacked wall units,
After the base end and the tank body are spatially isolated from each other in a state where communication can be controlled via an on-off valve, a pump device is arranged at the base end and water assembled by the pump device is supplied to the tank main body. While arranging the pipe material to be conveyed and discharged into the interior space of
A water storage / snow melting tank characterized in that at least a wall unit constituting the tank body of the base end and the tank body has a double structure, and an appropriate load means is disposed in the internal space having the double structure. 2. The water storage / snow melting tank according to claim 1, wherein the load means is a test piece for a concrete structure. 3. The water storage / snow melting tank according to claim 1, wherein an outer diameter of the base end portion is designed to be larger than a diameter of the outer diameter of the tank main body. 4. The water storage / snow melting tank according to claim 1, wherein a water intake opening for taking in soil water is provided on an upper surface and / or a side surface of the panel material constituting the base end portion.

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