JP2019099151A - Bag type storage tank - Google Patents

Abstract

To provide a bag type storage tank capable of realizing both large capacity and seismic resistance without using a frame body of high rigidity.SOLUTION: A bag type storage tank comprises a foldable bottomed flat bag body 20, multiple radial partition parts 30 radially arranged inside the flat bag body 20 and partitioning the inner space of the flat bag body 20 into multiple compartments 26, and multiple spacers 31 arranged inside the flat bag body 20. The multiple radial partition parts 30 and the multiple spacers 31 restrict extension of the flat bag body 20, so that the flat bag body 20 forms a circular plane and a three-dimensional flat shape.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bag-type storage tank suitable for disaster prevention and emergency use, and more particularly to a bag-type storage tank capable of achieving both a large capacity of several tens of thousands of liters and earthquake resistance.

Generally, the material and shape of the storage tank differ depending on the type and storage volume of the storage fluid.
The simple type storage tank which consists of a sheet container which formed the waterproof sheet in a cylindrical shape or a rectangle, and a frame which accommodates a sheet container is known by patent documents 1-3.
This type of simple reservoir can be stored compactly, and is assembled and used in a three-dimensional form at the use site.

Japanese Patent Application Laid-Open No. 9-110087 Registered Utility Model No. 3054943 JP 2012-25399 A

The conventional simplified reservoir has the following problems.
<1> The conventional simple type storage tank has a small storage capacity of about several hundred liters.
If the <2> simple type storage tank is simply enlarged, the weight increases and the transportability of the storage tank and the assemblability at the site deteriorate.
<3> When the size is increased while maintaining the dimensional ratio of the conventional simple type storage tank so that a large amount of water, for example, 10,000 liters or more can be stored, huge water pressure is generated in the sheet container exhibiting a cylindrical or square shape. Works. In addition, a high strength that can withstand earthquake shaking is required.
Therefore, it is not possible to simply increase the size of the conventional simplified storage tank, and in order to increase the size, it is necessary to newly develop a seismic pressure resistant structure of the sheet container and the frame.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a bag-type storage tank capable of achieving both a large storage capacity and earthquake resistance.

The present invention is a bag-type storage tank capable of supplying and discharging a storage liquid, and is provided with a flat bag body having a foldable bottomed structure having a circular planar shape. The flat bag has a bottom having a circular planar shape, a top having a central opening at a part of the circular shape, and a side surface having an annular shape connecting the bottom and the top.
The flat bag body is radially disposed inside the flat bag body, and a plurality of radiation partition bands that define the inner space of the flat bag body into a plurality of compartments, and is disposed inside the flat bag body And a plurality of spacers for restricting the displacement in the height direction.
The flat bag is a combination of a plurality of radiation partitions and a plurality of spacers, so that when filled with the storage liquid, the flat bag has a planar circular three-dimensional flat shape using the liquid pressure of the storage liquid. Can be held.
In another aspect of the present invention, the openings at both ends of the plurality of compartments communicate with the space of the central portion and the outer peripheral portion of the flat bag.
In another aspect of the present invention, a part of the flat bag body is provided with one or more supply / discharge facilities (valves) for supplying / discharging the storage fluid.
In another embodiment of the present invention, a plurality of floats may be attached to the upper surface of the flat bag.
In another embodiment of the present invention, the flat bag may be formed into a bag shape by joining a plurality of divided sheet pieces.

The present invention can obtain at least one of the following effects.
By combining the <1> flat bag body, the plurality of radiation partition bands, and the plurality of spacers, it is possible to achieve both a large storage capacity and earthquake resistance.
<2> Since a stable three-dimensional shape can be maintained only by the flat bag body, a conventional rigid frame body is not required, and the bag type storage tank can be economically manufactured. Storage and installation on site become easy.
Since the liquid pressure of the stored liquid is dispersedly supported through the entire surface of the flat bag and the plurality of radiation partitions and the plurality of spacers, the capacity of the bag-shaped storage tank can be increased in units of several tens of thousands of liters.
<4> Even if an earthquake occurs at the time of storage, the radiation partition suppresses the propagation of the shaking of the reservoir liquid, and the plurality of radiation partitions and spacers restrain the deformation of the flat bag body, so that the earthquake resistance of the bag type storage tank Sex will be greatly improved.
<5> Since the openings at both ends of the compartment in the flat bag body are respectively in communication with the space at the center and the outer periphery of the flat bag body, the supply of the storage fluid is more complete than in the case where the inner space of the flat bag body is completely partitioned. Exclusivity improves.
If the <6> flat bag body is divided into a plurality of divided sheet pieces and these divided sheet pieces are joined, a flat bag body of any capacity can be easily manufactured.
The <7> bag-type storage tank can realize a large capacity in units of several tens of thousands of liters, and thus can be used at various sites requiring supply of a large amount of liquid or storage of a large amount of liquid, and is versatile.

Whole perspective view of the bag type storage tank which concerns on this invention which abbreviate | omitted one part Top view of bag type storage tank which omitted a part Explanatory drawing of the flat bag body which abbreviate | omitted a part of radiation partition zone An illustration of a flat bag with a part omitted

  The invention will now be described with reference to the drawings.

<1> Outline of bag-type storage tank Referring to FIGS. 1 and 2, the bag-type storage tank 10 (hereinafter referred to as "storage tank 10") is a flat bag body 20 with a bottomed structure having a circular planar shape. And a plurality of radiation partition bands 30 radially disposed inside the flat bag body 20 and defining the inner space of the flat bag body 20 into a plurality of compartments 26, and disposed inside the flat bag body 20. And at least a spacer 31 for restricting the displacement of the flat bag body 20 in the height direction.

<2> Reservoir Liquid Reservoir liquid includes various fluid liquids such as water, oil, and chemical solutions.

<3> Flat bag body The flat bag body 20 is positioned to face the bottom surface 21 having a circular planar shape and the bottom surface 21, and is an annular shape connecting the upper surface 22 having a circular planar shape and both surfaces 21 and 12. And the side surface 23 of the
The three-dimensional shape of the flat bag body 20 exhibits a truncated (or hemispherical) shape in which the bottom surface 21 is flat and the top surface 22 is slightly rounded.
The flat bag body 20 can be folded compactly, and if the handle is attached to a plurality of places on the outer surface, the flat bag body 20 can be easily folded and unfolded.

<3.1> Material of Flat Bag Body The flat bag body 20 is made of at least a waterproof (waterproof) sheet. As the material of the flat bag body 20, it is possible to use a single layer sheet or a laminated sheet which is excellent in durability, weather resistance, heat resistance, chemical resistance and the like in addition to tensile strength.
Specifically, known materials such as polyvinyl chloride sheets and rubber sheets can be applied. As a material of the flat bag body 20, an appropriate material may be selected in consideration of the economy, the handling property, and the manufacturing property.

<3.2> Method of Forming Flat Bag Body Although it is possible to form the flat bag body 20 with a single sheet, it is also possible to form a bag shape by joining a plurality of divided sheet pieces. is there.
In the case of the latter formation method, the flat bag body 20 is divided into a plurality of divided sheet pieces, and these divided sheet pieces are joined by joining means such as sewing or bonding to form a bag.
The division shape and the number of divisions of each sheet piece are appropriately selected according to the volume of the flat bag body 20.

<3.3> Supply and Discharge System of Reservoir Liquid The central port 24 for supplying and discharging the reservoir liquid is formed on the upper surface 22 of the flat bag body 20, and the central port 24 can be opened and closed by the lid 25.
When the central port 24 is closed by the lid 25, the lid 25 can be sealed so as to restrict the leakage of the reservoir liquid through the central port 24.

  One or more valves 27 are provided in a part of the side surface 23, through which the stored liquid can be supplied and discharged.

<3.4> The reason why the flat bag is formed to be flat For example, when the three-dimensional shape of the bag is cylindrical or prismatic, it is difficult to maintain a three-dimensional shape by a large hydraulic pressure acting on the side surface of the bag. Not only that, but also the stability during earthquakes is bad.

Therefore, in the present invention, the three-dimensional shape of the flat bag body 20 is made to be a substantially frusto-conical flat shape so that the self-supporting property and the stability of the storage tank 10 can be compatible.
The “flat shape” in the present invention refers to a dimensional relationship in which the height is smaller than the bottom diameter of the flat bag 20 at the time of full water, and practically, the height of the flat bag 20 is smaller than the bottom diameter. The range of 1/10 to 1/3 is desirable.
For example, when the flat bag body 20 has a volume of 300,000 liters, the bottom face diameter of the flat bag body 20 is about 19 m and the height is about 2 m or less.

<4> Radiation partition zone The radiation partition zone 30 is a strip-shaped sheet piece radially arranged in the flat bag body 20, and the upper and lower sides thereof are fixed to the bottom surface 21 and the top surface 22 by stitching or adhesion.
The inner end of the radiation partition 30 is located near the central opening 24, and the outer end of the radiation partition 30 is located at a distance from the side surface 23.
As shown in an enlarged manner in FIG. 3, the outer end side of the radiation partition band 30 is not fixed to the side surface 23 of the flat bag body 20.

<4.1> Function of Radiation Partition Zone The radiation partition zone 30 is not only a partition material for forming a plurality of compartments 26 inside the flat bag body 20, but also the separation of the top surface 22 with respect to the bottom surface 21 is a certain range In addition, it functions as a spacer material that restricts, and also functions as a reinforcing member that limits expansion of the upper surface 22 and the side surface 23 of the flat bag body 20 in the radial direction to a certain range.

<4.2> Compartments Within the flat bag body 20, a plurality of compartments 26 having a substantially fan-like planar shape are formed by the two adjacent radiation partitions 30, the bottom face 21 and the top face 22. .
The central portion and the outer peripheral portion of the flat bag body 20 are not divided by the radiation partition band 30, and both ends of the plurality of compartments 26 are in the space of the central portion of the flat bag body 20 and the annular space of the outer peripheral portion They are in communication with each other.
The reason why the inner space of the flat bag body 20 is partitioned by the plurality of radiation partition bands 30 is to suppress the propagation of the shaking of the storage liquid at the time of an earthquake.
The reason why the openings at both ends of the plurality of compartments 26 are communicated with the space at the central portion of the flat bag body 20 and the annular space at the outer peripheral portion without completely dividing the inner space of the flat bag body 20 is This is to make it easy to discharge.

<5> Spacer Referring to FIG. 4, the spacer 31 is a strip or a string placed longitudinally in the flat bag 20, and the upper and lower ends thereof are on the bottom 21 and the top 22 of the flat bag 20. Each is fixed by suturing or adhesion.
The spacer 31 is a spacing member which regulates the opposing distance between the bottom surface 21 and the top surface 22 within a certain range in cooperation with the radiation partitioning band 30, and is disposed at a suitable interval not to interfere with the radiation partitioning band 30. It is
The number of the radiation partition strips 30 and the number of the spacers 31 are appropriately selected in consideration of the volume of the flat bag body 20 and the like.

<6> Material Strength of Storage Tank The sheet material of the flat bag body 20 constituting the storage tank 10, the radiation partition zone 30 and the spacer 31 have a strength sufficient to maintain the three-dimensional shape of the flat bag body 20 at the time of an earthquake. It has been granted.

<7> Floats A plurality of floats 40 are attached to the inner surface (lower surface) of the upper surface 22 of the flat bag body 20.
The float 40 is a buoyant body for floating the upper surface 22 of the flat bag body 20 by utilizing the rise in the liquid level of the storage liquid.
As the float 40, a known buoyant structure such as expanded polystyrene or a hollow structure can be applied.
The shape of the float 40 is not particularly limited, and, for example, a sphere, a cylinder, a plate or the like can be applied, and the attachment means may be either of a mooring type or a fixation type.

[How to use the storage tank]
Below, the usage method of the storage tank 10 is demonstrated.

1. Reservoir of Reservoir The method of storing the reservoir in the reservoir 10 will be described.

<1> Expansion of Flat Bag Body The flat bag body 20 carried in in a folded state is expanded at an installation site, and the bottom surface 21 of the flat bag body 20 is placed on a flat horizontal support surface.
Since the flat bag body 20 is formed only of the sheet material, the flat bag body 20 can be easily deployed at the installation site.

<2> Supply of Reservoir Solution A supply hose is inserted into the central opening 24 of the flat bag body 20 to start infusion of the reservoir solution.
The inner space of the flat bag body 20 is partitioned by a plurality of radiation partition zones 30, but since both ends of each compartment 26 are open, the reservoir liquid injected from the central portion of the flat bag body 20 is a flat bag body Spread towards the whole of twenty.

<2.1> Expansion of Bottom The bottom 21 of the flat bag body 20 is expanded in a circle.
In the initial stage of injection, the bottom surface 21 of the flat bag body 20 can be easily expanded to a wrinkle-free state by utilizing the liquid pressure of the reservoir liquid.

<2.2> Expansion of the Side As the liquid level rises, the side 23 of the flat bag body 20 in a deflated state gradually expands in the radial direction.
When the side surface 23 of the flat bag body 20 expands in an annular shape, the expansion of the side surface 23 is restricted by the tensile strength of the side surface 23 itself and the tensile strength of the plurality of radiation partition bands 30.

When the side surface 23 of the flat bag body 20 is expanded, the upper surface 22 is expanded in the expansion direction.
When the float 40 receives buoyancy, the upper surface 22 rises as the liquid level rises.
The expansion of the side surface 23 of the flat bag 20 and the elevation of the upper surface 22 proceed in parallel, and the three-dimensional shape of the flat bag 20 expands in a truncated shape.
When the flat bag body 20 reaches full, the pouring of the reservoir liquid is stopped, the central opening 24 is closed by the lid 25, and the storage operation of the reservoir liquid is finished.

The stored liquid has a frusto-conical shape similar to that of the flat bag body 20, and the surface area is larger than the landing area, and surface tension acts on the surface of the stored liquid.
Therefore, the upper surface 22 of the flat bag body 20 does not sink or the reservoir liquid overflows from the central opening 24 even if a worker gets on. Therefore, the operator can close the central opening 24 with the lid 25 while riding on the upper surface 22.

  In the above, the embodiment has been described in which the reservoir liquid is supplied through the central opening 24 of the flat bag body 20, but the reservoir liquid may be supplied in combination with the valve 27 provided in part of the side 23 or by the valve 27 alone. You may

2. Storage of Reservoir Solution Storage of reservoir solution is explained.

<1> Normal time In normal times, the hydraulic pressure according to the depth is acting on the entire sheet surface of the flat bag body 20 constituting the storage tank 10 at the normal time.
The weight of the storage fluid acting on the bottom surface 21 of the flat bag body 20 is supported by the horizontal support surface.
The hydraulic pressure acts on the side surface 23 and the upper surface 22 of the flat bag body 20 as a tensile force directed in the spreading direction, but these tensile forces are dispersed on the bottom surface 21, the side surface 23 and the upper surface 22 of the flat bag body 20. It is supported in a distributed manner by the plurality of radiation partitions 30 and the plurality of spacers 31.
Accordingly, the flat bag body 20 can maintain a flat shape in which the bottom surface 21 is flat and the upper surface 22 is slightly rounded and the entire storage tank 10 has a truncated shape.

<2> At the time of earthquake Because the inner space of the flat bag body 20 is radially partitioned by the plurality of radiation partitioning zones 30, the plurality of radiation partitioning zones 30 are sideways of the storage fluid even if the storage tank 10 sways. It is possible to reduce the displacement of the reservoir liquid by suppressing the propagation of shaking.
Furthermore, since the plurality of radiation partitioning zones 30 and the spacers 31 provided between the bottom surface 21 and the top surface 22 of the flat bag body 20 suppress the deformation of the top surface 22, the pitching of the stored liquid is effectively suppressed. Can.
Therefore, even if an earthquake occurs during storage of the reservoir liquid, not only can bursting of the flat bag body 20 be prevented, but also rolling of the storage tank 10 and leakage of the reservoir liquid can be effectively suppressed.

3. Discharge of Reservoir Liquid Discharge of the reservoir liquid is explained.

<1> Discharge via a Valve When the supply of the storage liquid is required, the storage liquid in the storage tank 10 can be discharged and provided to a desired use by opening the valve 27.
Since the openings at both ends of the plurality of compartments 26 in the flat bag body 20 communicate with the space of the central portion and the outer peripheral portion of the flat bag body 20, it is possible to discharge all of the reservoir liquid.

<2> Discharge through Central Port It is also possible to discharge the reservoir liquid in the storage tank 10 through the central port 24.
Furthermore, it is possible to discharge the reservoir liquid through the valve 27 and the central opening 24, and it is possible to properly use the supply route in consideration of usage and supply amount.

4. Use example The storage tank 10 according to the present invention can be used, for example, for supply of a large amount of cooling water in various large power generation facilities or the like, or for provisional storage of a large amount of drainage water.
The use of the storage tank 10 is not limited to the above-mentioned example, and can be used in indoor and outdoor sites requiring supply of various types of large amounts of liquid or storage of large amounts of liquid.

10 · · · Storage tank 20 · · · Flat bag body 21 · · · Bottom surface 22 of the flat bag body · · · · Top surface 23 of the flat bag body · · · · · Side 24 of the flat bag body · · · Central mouth 25 ... Lid 26 ... ... Compartment 27 ... ... Valve 30 ... ... Radiation partition 31 ... ... Spacer 40 ... ... Float

Claims (5)

A bag type storage tank capable of supplying and discharging storage fluid,
A flat bag having a bottom surface having a circular planar shape, a top surface having a central surface in a plan view having a central opening, and a side surface having an annular shape and connecting the bottom surface and the upper surface;
A plurality of radiation dividers disposed radially inside the flat bag and defining an inner space of the flat bag into a plurality of compartments;
At least a plurality of spacers disposed inside the flat bag body and regulating the displacement of the flat bag body in the height direction at a constant level;
It is characterized in that the expansion of the flat bag is restricted by the plurality of radiation partitions and the plurality of spacers such that the flat bag has a three-dimensional flat shape having a circular shape when filled with the storage liquid. And
Bag type storage tank.   The bag-type storage tank according to claim 1, wherein the openings at both ends of the plurality of compartments communicate with the space at the center of the flat bag and the space at the outer periphery.   The bag-type storage tank according to claim 1 or 2, wherein one or more supply / discharge facilities for supplying / discharging a reservoir liquid are disposed on a part of the side surface of the flat bag body. .   The bag type storage tank according to any one of claims 1 to 3, wherein a plurality of floats are attached to the upper surface of the flat bag body.   The bag according to any one of claims 1 to 4, wherein the flat bag body comprises a plurality of divided sheet pieces, and the plurality of divided sheet pieces are joined to form a bag shape. Type storage tank.

Images