JP2001163394A - Liquid storage facility and bag-like tank used for the facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid storage facility used for efficiently manufacturing, setting and the like even in the case of a large volume and also provide bag-like tanks used for the facility. SOLUTION: The liquid storage facility 1 is used for immersing bag-like tanks 3 in an adjusting liquid W stored in a pit 2 and storing a liquid A stored inside, and a plurality of bag-like tanks 3 of the plane view triangle shape are disposed radially in the pit 2 of the plane view round shape. Respective bag-like tanks 3 are constituted of foldable supporting frames.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid storage facility for storing liquid and a bag-like tank used for the same.

[0002]

2. Description of the Related Art As is well known, a tank is used for storing a liquid. The structure of the tank differs depending on the type of liquid stored in the tank. In particular, tanks for storing dangerous substances such as oils have detailed specifications and standards for the structure and strength. Facilities for storing liquids on a large scale include, for example, above-ground heavy oil tanks, but even when liquids that are treated as non-dangerous substances such as orinoco tar emulsions need to be stored on a large scale, In general, a part of such a ready-made heavy oil tank is modified and stored.

When storing non-dangerous liquids such as orinoco tar emulsions, a strict structure such as a conventional heavy oil tank is not required. It can be considered that it can be constructed relatively inexpensively. In particular, orinoco tar has been spotlighted as one of the alternative energy sources of petroleum due to its huge amount of proven recoverable reserves, its low cost, and its low pollution. As they are being used, their own storage needs have arisen. From the above, it has been required to develop a dedicated storage facility that can be constructed at a low cost for such a liquid.

[0004] In view of the above circumstances, the present applicant has already developed and provided a technique disclosed in Japanese Patent Application Laid-Open No. 10-101183. According to this technique, an adjustment liquid such as seawater is stored in an outer shell formed on the ground, a bag-shaped tank made of a flexible material is immersed in the adjustment liquid, and the orinocotal emulsion is dispersed in the bag-shaped tank. Such a storage liquid is stored.

[0005]

However, the above-mentioned liquid storage facility provided by the present applicant has the following problems. That is, when a large-capacity liquid storage facility is configured, the outer shell and the bag-shaped tank become very large. As the outer shell becomes larger, it may be necessary to install cutting beams in order to securely support the side walls.In such a case, the expansion and contraction of the bag-shaped tank hinders the cutting beams. Will be done. Also, as a matter of course, it takes time to manufacture and install a large bag-shaped tank. Further, it is also inefficient to fabricate bag-shaped tanks to suit the capacity of the liquid storage facility. The bag-shaped tank has a configuration in which the cross-sectional area in the lateral direction increases or decreases as the amount of stored liquid increases or decreases. However, when the bag-like tank is large, the behavior at that time becomes complicated. There is also a problem. The present invention has been made in view of the above points, and provides a liquid storage facility and a bag-shaped tank used for the same that can be efficiently manufactured and installed even in the case of a large capacity. As an issue.

[0006]

The invention according to claim 1 is
An outer shell body in which an adjustment liquid is stored, a bag-shaped tank made of a flexible material disposed in the outer shell by being immersed in the adjustment liquid, and A supply / discharge facility for supplying / discharging the stored liquid, and adjusting means for adjusting a water level of the adjusting liquid in the outer shell, wherein the outer shell is circular or polygonal in plan view, A plurality of the bag-shaped tanks are provided inside the outer shell, and each of the bag-shaped tanks has a triangular shape or a fan shape in a plan view, and is arranged radially with respect to a center portion of the outer shell. Features.

[0007] Thus, a cylindrical liquid storage facility is formed. By providing a plurality of bag-shaped tanks, a plurality of bag-shaped tanks having the same shape may be manufactured, and the manufacturing is facilitated.

[0010] The invention according to claim 2 is the liquid storage facility according to claim 1, wherein the bag-shaped tank is a V-shaped frame in a plan view in which the upper and lower surfaces are located along two sides adjacent to each other. Wherein the frame is foldable with the vertex of the V-shape as a folding point.

As described above, by providing the bag-shaped tank with the frame which is V-shaped in plan view and which can be folded at the top of the V-shape, the frame expands or contracts in accordance with the storage liquid. Accompanying this, the entire bag-shaped tank expands or contracts.

According to a third aspect of the present invention, a bag-like tank made of a flexible material is immersed in the adjusting liquid stored in the outer shell, and the stored liquid is stored in the bag-like tank. The bag-shaped tank used in a liquid storage facility, wherein the bag-shaped tank has a triangular shape or a fan shape in a plan view, and either or both of an upper portion and a lower portion thereof have two sides adjacent to each other. V-shaped in a plan view and V
It is characterized in that it has a frame that can be folded with the vertex of the character as a folding point, and that a bag for storing the stored liquid is supported by the frame.

According to a fourth aspect of the present invention, there is provided the bag-shaped tank according to the third aspect, wherein the frame is provided at an upper portion and a lower portion of the bag-shaped tank, and the upper and lower frames are connected to the bag-shaped tank. It is characterized by being connected by a hinge located along one corner of the tank.

By connecting the upper and lower frames with the hinges as described above, the frame can be folded at the V-shaped apex, and the frame has high rigidity.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, first and second embodiments of a liquid storage facility and a bag-like tank used for the same according to the present invention will be described with reference to FIGS.

[First Embodiment] As shown in FIG.
The liquid storage facility 1 is suitable for a capacity of, for example, about 10,000 kl or more, and includes a pit (outer shell) 2 formed by excavating the ground G and a plurality of bag-shaped tanks 3. .

The pit 2 is, for example, circular in plan view and has a predetermined depth, and its bottom plate 2a and side walls 2b are made of concrete, FRP, or the like. Inside the pit 2, an adjustment liquid W made of water or the like is stored.

The pit 2 is provided with a water level adjusting mechanism (adjusting means) 5 for adjusting the water level L of the adjusting liquid W. The water level adjusting mechanism 5 includes an adjusting pump 6 and an adjusting pipe 8 installed from the adjusting pump 6 toward the inside of the pit 2 and the external water area 7. In addition, the external water area 7 is, for example, the sea specifically, and therefore, the water level adjusting mechanism 5 can adjust the water level L of the adjusting liquid W by supplying and discharging water to and from the external water area 7. Has become. Here, the water level L of the adjustment liquid W is maintained substantially the same as the water level in the external water area 7 and the groundwater level in the ground G (however, the two water levels do not necessarily have to match).

Each of the plurality of bag-shaped tanks 3 arranged inside the pit 2 has a triangular shape or a fan shape in plan view, and these are formed in a space formed by radially dividing the pit 2 into a plurality. The configuration is such that they are arranged one by one.

As shown in FIG. 2, each bag-shaped tank 3 is composed of a bag 9 made of a flexible material such as a rubber sheet and a frame 10. The frame unit 10
It comprises a support frame (frame) 11 provided on each of the upper and lower portions of the bag-shaped tank 3, and a hinge 12 provided along one corner of the bag-shaped tank 3. The support frame 11 has a substantially V-shape located along two sides adjacent to each other in each of the upper part and the lower part of the bag-shaped tank 3. The upper and lower ends of the hinge 12 are provided with the upper and lower V-shaped support frames 11, 11.
Are foldable at the vertices of the V-shape so that the two sides approach and separate from each other.

The bag 9 is supported by the support frame 11.
In addition, a film material is attached to the hinge 12, and the cross-sectional area of the internal space of the bag body 9 is increased or decreased according to the opening and closing operation of the upper and lower support frames 11.

Such a bag-shaped tank 3 has a hinge 12
2 (see FIG. 2) is arranged in the center of the pit 2, and the V-shaped support frame 11 (see FIG. 2) is arranged in the pit 2 in such a manner as to extend radially from the center of the pit 2. .

In order to construct such a liquid storage facility 1, as shown in FIG. 2, a bag-like tank 3 composed of a frame portion 10 and a bag body 9 is previously assembled and unitized, and this is then ground. A predetermined number is arranged in the pit 2 formed by excavation. Further, the adjusting pump 6 and the adjusting pipe 8
The liquid storage facility 1 having a circular shape in plan view is constructed by installing a water level adjusting mechanism 5 composed of

The liquid storage facility 1 as described above has the same operation as the technique disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 10-101183.

That is, as shown in FIG.
Is supplied from a supply source such as an oil tanker, and supplied into the bag-shaped tank 3 via the supply / discharge pipe 15. At this time, the liquid level of the stored liquid A is equal to the adjustment liquid W and the stored liquid A.
If the specific gravity is the same, it always matches the liquid level of the adjusting liquid W regardless of the amount of the stored liquid A.

For example, when the storage liquid A is an orinocotal emulsion and the adjustment liquid W is seawater, the specific gravities of the two are almost the same. The working hydraulic pressure is the same. When the stored liquid A is further supplied into the bag-shaped tank 3, the water level of the stored liquid A rises instantaneously, but due to the water level difference generated at this time, the liquid pressure acting inside and outside the bag-shaped tank 3 is reduced. A difference occurs, and the pressure difference causes the bag-shaped tank 3 to expand outward. At this time, as shown in FIG. 2, in the bag-shaped tank 3, the V-shaped support frame 11 is expanded by the hinge 12, and the bag body 9 is expanded accordingly. When the bag-shaped tank 3 spreads outward in this manner, the cross-sectional area in the bag-shaped tank 3 increases, and therefore the water level of the stored liquid A decreases, and finally reaches the same position as the adjustment liquid W. . When the water level of the stored liquid A becomes the same as the adjustment liquid W,
Since there is no longer any difference between the inside and outside of the liquid pressure in the bag-shaped tank 3, the expansion of the bag-shaped tank 3 is stopped.

As described above, once the liquid level of the stored liquid A becomes the same as that of the adjusting liquid W, even if the stored liquid A is further supplied into the bag-shaped tank 3, the bag is stored in accordance with the stored amount of the stored liquid A. Only the cross-sectional area in the tank 3 changes. Therefore, if the water level L of the adjustment liquid W is kept constant by the water level adjustment mechanism 5, the stored liquid A in the bag-shaped tank 3
Will also be kept constant at all times. Conversely, by changing the water level L of the adjustment liquid W, the water level of the stored liquid A can be adjusted.

When the stored liquid A stored in the bag-shaped tank 3 is to be taken out, the pump of the supply / discharge facility 16 is operated to send the stored liquid A to a supply destination such as a burner. In this case, in this case, the cross-sectional area of the bag-shaped tank 3 is reduced, and the water level of the stored liquid A is maintained at the same level as the water level L of the adjusting liquid W.

According to the liquid storage facility 1 described above, the bag-like tank 3 is immersed in the adjusting liquid W stored in the pit 2 to store the stored liquid A therein. Need only have a strength that can withstand the difference between the internal and external hydraulic pressures. Therefore, it is possible to construct a facility capable of exhibiting a large-capacity storage function at a much lower cost than a rigid tank such as a heavy oil tank conventionally used.

By arranging a plurality of triangular bag-shaped tanks 3 radially in a circular pit 2 in a plan view, a circular liquid storage facility 1 optimal for a storage capacity of about 10,000 kl or more is constructed. can do.

Further, since each bag-shaped tank 3 has a support frame 11 which is V-shaped in plan view and can be folded at the V-shaped apex, the support frame 11 is It opens and closes, and its internal cross-sectional area expands and contracts. Then, the change in the shape of the bag-shaped tank 3 according to the flow of the stored liquid A is surely controlled by opening and closing the support frame 11.

Further, by providing a plurality of bag-shaped tanks 3, each of the bag-shaped tanks 3 can be made smaller, and the construction thereof can be facilitated. In addition, since the shapes of the plurality of bag-shaped tanks 3 can be unified, the manufacturing efficiency and cost of the bag-shaped tank 3 can be reduced. In addition, even in the event of a leak, only the specific bag-shaped tank 3 that has leaked will be damaged, and the overall damage can be kept small. Further, even when there are a plurality of types of stored liquid A, it is possible to store the same in one liquid storage facility 1. Further, by providing the circular pit 2 with the bag-shaped tank 3 having a triangular or fan shape in plan view, the internal space of the pit 2 can be utilized to the maximum.

[Second Embodiment] Next, a second embodiment of the present invention will be described. As shown in FIG. 4, the bag-shaped tank 40 includes a support frame (frame) 41 and the bag 9 attached to the frame. The support frame 41 includes a hollow tube member 42, into which sand, air, liquid, or the like is injected.

The support frame 41 can function as a "float" by injecting air or the like into the tube member 42 on the upper side of the bag-like tank 40, for example. By injecting sand, a liquid having a larger specific gravity than the adjusting liquid W (see FIG. 1), and the like, the lower part of the can function as a “weight”.

Thus, the bag-like tank 40 can be fixed in the pit 2 (see FIG. 1) while maintaining its shape.

Further, by making such a tube member 42 made of rubber, there is an advantage that even when the bag-shaped tank 40 is folded, even if the bag-like tank 40 is bent or twisted, the original shape can be easily restored. is there. Such a support frame 41
Has the advantage that if the internal pressure is higher than the surroundings, the rigidity of the support frame can be secured. Furthermore, if the tube member 42 is made of rubber, the adhesive strength with the bag body 9 becomes very high, and the durability can be enhanced. Note that the bonding between the support frame 41 and the bag body 9 may use an adhesive or the like, or may be performed by heat fusion.

Although the first and second embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, but can be used for storing any liquid. Yes, and its structure, form, and other changes can be made in response to restrictions on the installation location. For example, in the above-described embodiment, an example in which the specific gravities of the adjustment liquid W and the stored liquid A are substantially equal has been described, but these specific gravities may be different.
In addition, it is possible to change the material used, the structure and the installation location, and the like.

Further, the bag-shaped tanks 3 and 40 having the above structure are
Of course, the present invention can be applied to a configuration other than a configuration in which the pits are always radially accommodated in the circular pit 2. For example, a configuration may be adopted in which the bag-shaped tanks 3 and 40 are individually stored in pits having various shapes such as a rectangular shape or a triangular shape. Further, for example, a configuration in which bag-like tanks 3 and 40 are alternately put in a rectangular pit as a set of two pieces is also possible.

In addition, for example, in the above-described embodiment, the bag-like tanks 3 and 40 may be, for example, simple envelopes (thick cylinders). When the bag-shaped tanks 3 and 40 are formed in the envelope shape or the like, the capacity is made larger than the volume of the divided space in the pit 2 by
When the stored liquid A is filled in the bag-shaped tanks 3 and 40, they naturally expand into a triangular prism shape. Of course, there is no problem with other shapes. In addition, although the bag-shaped tanks 3 and 40 are made of rubber sheets, they may be made of other flexible materials such as synthetic resin and fiber instead.

Further, the unit is constituted by combining the bag-shaped tanks 3, 40 and the support frames 11, 41.
The shape and structure of the support frames 11 and 41 are not limited at all. For example, the support frames 11, 4
1 is provided only in the upper part of the bag-shaped tanks 3, 40,
A configuration in which the bag 9 is suspended may be employed.

The bottom plate 2a and the side wall 2b of the pit 2
Is a concrete wall, but this may be constituted by a sheet pile. In addition, since these may be simply configured to be able to store the adjustment liquid W, they do not necessarily have to have a water stopping structure. Accordingly, when the liquid depth of the adjustment liquid W is relatively shallow, a slope structure can be employed, and in that case, the construction cost can be reduced. Further, it is conceivable to construct the pit 2 with a caisson.

Further, the liquid storage facility 1 can be applied to a conventional above-ground tank. Further, the installation location of the liquid storage facility 1 does not need to be in the ground, and the pit 2 may be constructed in the sea or lake water, and the bag-shaped tanks 3 and 40 may be built therein. In this case,
The configuration of the water level adjusting mechanism 5 can be simplified.
Further, the external water area 7 is not limited to the sea, but may be a lake or a pond. In that case, fresh water may be used as the adjustment liquid. Further, it is not necessary to secure the adjusting liquid W using the external water area 7 as a supply source. For example, in winter, cooling water of a power plant may be used as the adjusting liquid W, and equipment costs such as heaters may be reduced. Can be reduced.

Other than the above, any configuration may be adopted as long as it does not depart from the gist of the present invention, and it is needless to say that the above-described configurations may be appropriately selectively combined. No.

[0042]

As described above, according to the liquid storage facility of the first aspect, since the adjusting liquid is stored inside the outer shell and the bag-shaped tank is immersed therein, The tank may be configured to withstand liquid pressure acting on the inside and outside thereof, so that a liquid storage facility can be realized at a lower construction cost than conventional rigid tanks and the like. Also, by providing a plurality of bag-shaped tanks in the outer shell, each of the bag-shaped tanks becomes smaller,
Construction can be facilitated. In addition, since the shape of the bag-shaped tank can be unified, the efficiency and cost of manufacturing the bag-shaped tank can be reduced. In addition, by changing the number of the bag-shaped tanks to be installed, liquid storage facilities of various capacities can be accommodated, and the liquid storage facilities can be constructed at lower cost.

According to the liquid storage facility of the second aspect, the bag-shaped tank has a frame that can be folded in a V-shape in plan view. Accordingly, the entire bag-shaped tank expands or contracts in accordance with the flow of the stored liquid, so that the storage amount can be changed. Then, a change in the shape of the bag-shaped tank according to the flow of the stored liquid is surely controlled by opening and closing the frame.

According to the bag-shaped tank according to the third aspect, the bag has a triangular shape or a fan shape in plan view, and has a V-shaped frame in plan view on one or both of its upper and lower parts. The body is supported by the frame. Such a bag-shaped tank can be suitably used for liquid storage facilities of various shapes, including the circular liquid storage facility according to claim 1 or 2. The frame expands or contracts in accordance with the flow of the stored liquid, so that the frame can cope with fluctuations in the storage amount. And
The change in the shape of the bag-shaped tank according to the flow of the stored liquid is surely controlled by opening and closing the frame.

According to the bag-shaped tank according to the fourth aspect, the frame is provided on each of the upper portion and the lower portion of the bag-shaped tank,
The upper and lower frames are connected by hinges. By connecting the upper and lower frames with the hinge in this manner, the frame can be folded at the V-shaped vertex, and the frame has high rigidity. Therefore, the shape of the bag can be maintained, and the shape of the bag-shaped tank changes according to the flow of the stored liquid,
It will be controlled more reliably.

[Brief description of the drawings]

FIG. 1 is a perspective sectional view showing a first embodiment of a liquid storage facility and a bag-like tank used for the same according to the present invention.

FIG. 2 is a view showing the bag-shaped tank.

FIG. 3 is a view showing the behavior of the bag-shaped tank when the amount of liquid stored in the bag-shaped tank changes.

FIG. 4 is a view showing a second embodiment of the bag-shaped tank.

[Description of Signs] 1 Liquid storage facility 2 Pit (outer shell) 3,40 Bag-shaped tank 5 Water level adjustment mechanism (adjustment means) 9 Bag 11,41 Support frame (frame) 12 Hinge 16 Supply / discharge equipment

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tadashi Ono 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation F-term (reference) 3E070 AA03 AA10 AA12 AA13 AB01 CA03 CC07 DA01 DA03 DA08 DA10 DA15 GB01 GB04 RA01 RA09 SA01 SA03 SA05

Claims (4)

[Claims] 1. An outer shell body in which an adjustment liquid is stored, a bag-shaped tank made of a flexible material and immersed in the adjustment liquid in the outer shell body, and the bag. A supply and discharge facility for supplying and discharging the stored liquid to and from the inside of the tank, and an adjusting means for adjusting a water level of the adjustment liquid in the outer shell, wherein the outer shell is circular or polygonal in plan view. A plurality of the bag-shaped tanks are provided inside the outer shell, and each of the bag-shaped tanks has a triangular shape or a fan shape in a plan view, and is arranged radially with respect to a center portion of the outer shell. A liquid storage facility characterized in that: 2. The liquid storage facility according to claim 1, wherein the bag-shaped tank has a V-shaped frame in plan view positioned along two sides adjacent to each other on upper and lower surfaces thereof. The liquid storage facility is characterized in that it is foldable at a vertex of a V-shape. 3. A liquid storage facility having a configuration in which a bag-like tank made of a flexible material is immersed in an adjusting liquid stored inside an outer shell, and the stored liquid is stored in the bag-like tank. Wherein the bag-shaped tank has a triangular shape or a fan shape in a plan view, and is located in one or both of an upper portion and a lower portion thereof along two sides adjacent to each other in a plan view. A bag having a V-shape and having a frame that can be folded with the vertex of the V-shape as a folding point, wherein a bag body for storing the stored liquid is supported by the frame. Shaped tank. 4. The bag-shaped tank according to claim 3, wherein
The bag-shaped tank, wherein the frame is provided at an upper portion and a lower portion of the bag-shaped tank, respectively, and the upper and lower frames are connected by a hinge located along one corner of the bag-shaped tank.