JPH067054A - Water level following type partition water tank - Google Patents

Abstract

PURPOSE:To obtain the subject water tank following the change in water level of outer water area partitioned from the inner water area and capable of retaining the volume in a water tank in nearly definite value by coupling each wall face element of a float fixed to water bottom in a specific state. CONSTITUTION:Horizontal cross section of a float 20 in a water tank is formed into polygonal shape and the cross section in a nearly intermediate part of the height is formed lager than the openings on the top and bottom. Each wall face element bounded by each ridgeline is formed into trapezoid or rectangle in a main wall member and into isosceles triangle or rhombus in a coupled member 33. The coupled member 33 is folded in the interior of the water tank, followed by water level of outside water area.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water level following type isolation water tank which partitions an external water area and an internal water area and keeps the volume of the partitioned internal water area substantially constant.

[0002]

2. Description of the Related Art For example, in a polluted water area, in order to protect a seafood habitat or a fish farm from pollution,
Control the outflow of pollutants that are pollution sources, purify the entire water area including the bottom of the water to maintain or improve the water quality, purify the aquaculture plant by some method to purify the water in the aquaculture area, or use other water quality Need to move to a good place.
Further, when performing civil engineering work on the bottom of the water, it is necessary to separate the work water area and the outer water area so as not to diffuse the wastewater generated by the work to the outer water area.

[0003]

However, purification of water, etc. requires a wide range of measures and a long time and enormous cost, and an effective means cannot be obtained for a significantly polluted water area. However, depending on the place, there is no choice but to give up aquaculture, which is a life-and-death problem for those who make a living, and even if they get compensation for the fishery, they have become social problems that cannot be overlooked, such as a job change or a business outage.

Further, a bellows-type water tank has been conventionally proposed for partitioning an internal water area such as a culture water area or a working water area from an external water area. In this bellows-type water tank, for example, since the water tank whose diameter reaches ten and several meters is formed by a flexible bellows, it is not only difficult to manufacture itself but also the water level of the inner water area is changed due to the ebb and flow of water in the outer water area. It is also difficult to make them follow. The bellows-type water tank is a cylindrical bellows whose top end is open and whose bottom end is fixed so as to contact the bottom of the water. The bellows-type water tank expands and contracts in the axial direction but does not expand and contract in the radial direction. Therefore, the water stored inside will overflow when the bellows body shrinks,
When it extends, a distance is generated from the top opening to the water surface of the internal water area, which causes a problem that workability in the water tank deteriorates.

As another method of partitioning the inner water area from the outer water area, it is possible to form a water tank by using a net.
In such a case, there is a problem that the internal water area of the aquarium cannot be blocked or isolated from the external water area.

[0006] The present invention has been made in view of the above problems, and, in spite of almost completely partitioning the external water area and the internal water area, it follows the change in the water level of the external water area and the top of the water tank and the water surface in the water tank. It is an object of the present invention to provide a water level tracking type isolation water tank which can hold the distance to the water tank to a constant distance and can also keep the internal volume of the water tank substantially constant.

[0007]

According to the present invention for achieving the above object, a floating body floated on a water surface whose water level fluctuates is supported so that a top opening is located above the water surface, and a bottom portion is fixed to a water bottom. In the isolated water tank fixed to, a top opening formed by connecting the upper sides of a plurality of flat plate-shaped upper main wall members continuously in a polygonal shape,
Deformation for connecting a bottom opening formed by continuously connecting the lower sides of a plurality of flat lower main wall members to each other in a polygonal shape and the side edges of the main wall member and the lower main wall member. And a connecting member having a wide middle portion, the floating body is attached to the outer periphery of the top opening, a frame is provided on the outer periphery of the bottom opening, and the lower side and the lower main portion of the upper main wall member are provided. A water level following type isolation water tank characterized in that an upper side of a wall member is connected to the outside so as to be bendable outward.

[0008]

In the water level following type isolation tank having such a structure, when the water level fluctuates, the floating body floating on the water surface moves up and down due to the fluctuation of the water level which is a natural force, and the vertical displacement of the floating body. Accordingly, the intermediate portion connecting the upper main wall member and the lower main wall member is bent outward, and the connecting member connecting the side edges of the upper main wall member and the lower main wall member expands and contracts. Therefore, the vertical displacement due to the fluctuation of the water level can be converted into the lateral displacement of the upper main wall member and the lower main wall member, and the internal volume of the water tank can be maintained substantially constant. Further, since the water pressures inside and outside the water tank are balanced by this, an excessive external force does not act on the wall surface, and the wall surface only needs to have the strength necessary to simply separate the outer water area and the inner water area. Further, since the distance between the top of the water tank and the water surface in the water tank is always kept constant, workability is improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. FIG. 1 is a schematic perspective view showing a water level following type isolation water tank according to an embodiment of the present invention, FIG. 2 is a partially cutaway perspective view showing the conceptual configuration of the isolation water tank main body, and FIG. 3 is A-A in FIG.
FIG. 4 is an enlarged sectional view taken along the line, and FIG. 4 is a perspective view similar to the bulging state of FIG. In FIG. 1, an open-top water level tracking type isolation water tank 10 has a floating body 20 that floats on the water surface at the top so as to move up and down as the water level fluctuates.
It has a water tank main body 30 attached to the lower part of 0 and a fixing means 40 attached to the bottom of the water tank main body 30.

First, the water tank body 30 includes four upper main wall members 31 each of which is a trapezoidal flat plate, and four lower main walls each of which has the same shape as the trapezoidal flat plate of the upper main wall member 31. And a member 32, and these upper main wall members 31
As shown in FIG. 3, the lower main wall member 32 and the lower main wall member 32 are connected via a folded connecting member 33.

As shown in FIG. 2, a substantially octagonal top opening 34 formed by continuously connecting the upper sides of the upper main wall members 31 to each other is formed at the top of the water tank body 30, and the bottom is formed at the bottom. Has a substantially octagonal bottom opening 35 formed by connecting the lower sides of the lower main wall members 32 to each other. However, since the end portion of the top opening 34 is connected to the floating body 20, it cannot be expanded or contracted in the radial direction, and the connecting member 33 does not expand, but the end portion of the top opening 34 has a connecting member described in detail later. 33 is expanded so that it can be expanded and contracted. The bottom opening 35 is substantially the same, and the portion supported by the frame body 36 cannot be expanded or contracted in the radial direction, and the end portion of the bottom opening 35 can be expanded and contracted by the connecting member 33.
Thus, the substantially octagonal top opening 34 and bottom opening 35 are formed.
Is formed such that each side length is alternately long and short, and the short side portion is constituted by the connecting member 33.

The lower side of the upper main wall member 31 and the lower main wall member 3
The upper side of 2 is foldably connected. The intermediate portion C, which is a connecting portion between the two members 31 and 32, has a structure that is bent so as to bulge outward, and when the height H is adjusted, the intermediate portion C is bent. I have to. Therefore, as the whole shape of the aquarium body 30, the intermediate portion C
Has a larger horizontal cross-sectional area than the top or bottom openings 34, 35.

In the central portion C, a bone member (not shown) is installed so that its side length can be kept constant, and each ridgeline R which is a boundary between each main wall member 31, 32 and the connecting member 33. Rigidity is imparted to the portion by the stitch stitching which is projected to the outside. Therefore, each main wall member 31,
Numeral 32 is always kept in a substantially flat state by stitch stitching with this bone member.

The connecting member 33 is foldable in order to swell or contract the isolated water tank body 30 at the intermediate portion C thereof. In the folded state, the connecting member 33 has a substantially octagonal top opening 34 and a bottom opening 35. The short side of is the base,
Although it is formed into an isosceles triangle having the ridge line R as the other two sides, as shown in FIG. 3, a bent portion 37 extending when expanded.
2, the bent portion 37 is configured to extend from the center of the short side portion of the top opening 34 to the center of the short side portion of the bottom opening 35, as is clear from the broken portion in FIG. Has been done. By doing so, it is possible to follow the water level change due to the ebb and flow of the tide, fold it inward, and extend it toward the external water area. That is, at low tide, when the water level in the water tank becomes the minimum, this connecting member 33 expands toward the external water area, and the middle portion C thereof swells to the maximum, and conversely at the highest water level at high tide, The part C contracts, and the connecting member 33 enters the inside of the water tank and is folded. In addition, the extension line of each ridgeline R is the isolated water tank body 30.
It goes through the central axis of. Therefore, when the outer shape of the isolated water tank body 30 is divided into the upper and lower parts from the intermediate portion C, the upper main wall member 31 and the lower main wall member 32 are trapezoidal, and the connecting member 33 at the time of expansion is also trapezoidal. The overall shape when stretched is a diamond-cut type hexahedron.

Since the scale of the isolated water tank 10 is determined by the place where the isolated water tank 10 is installed, the dimensions of the top opening 34 and the bottom opening 35, the amount of expansion and contraction due to the difference in tidal range, and the water depth related to the height of the isolated water tank 10 are known. Therefore, only the side length of the intermediate portion C that satisfies the conditions described below can keep the internal volume of the water tank constant regardless of the ebb and flow and follow the water level of the external water area to maintain the same water level in the water tank. Is.

[0016] That is, by the first official Simpson sectional area changes can be determined three-dimensional volume not _{linear, 1 / 3h · A 0 +} 4a 1 + a 2/1 / 3H · A 0 + 4A
₁ + A ₂ = D / d = α From this, α (A ₀ + 4A ₁ + A ₂ ) −A ₀ = 4a ₁ + a ₂ .

Since A ₀ , A ₁ and A ₂ on the left side are known numbers, a ₁ and a ₂ on the right side may be obtained.

When the shape of the wall surface of the aquarium satisfies the above-mentioned diamond-cut geometrical condition, the relationship of a ₁ = a ₂ [{(α-1) / 2 + 1} ² / α ² ] is established. The maximum distance between the opposite sides of the main wall in the middle part is derived by the following equation. B _MAX = B _MIN (a ₂ / A ₀ ) ^0.5 Here, as is clear from FIGS. 5A, 5B, 5C, 5D and 5H, H: 1 of the height of the upper tank at the time of contraction (at high tide) / 2 A ₀ : Area of the top opening at the time of contraction (high tide) A ₁ : Half of the height of the upper water tank at the time of contraction (high tide)
Area of the area A ₂ : Area of the central part during contraction (high tide) D: Depth of the aquarium at contraction (high tide) d: Depth of the aquarium at extension (low tide) a ₁ : At extension ( 1/2 of the height of the upper tank at low tide)
Area a ₂ : Central area during extension (low tide) h: Half of upper tank height during extension (low tide) B _MAX : Middle part of main wall member during extension (low tide) Interval B _MIN : It is the interval of the middle part of the main wall member during contraction (at high tide).

The materials of the upper main wall member 31, the lower main wall member 32 and the connecting member 33 described above are preferably all made of synthetic fiber woven cloth or non-woven cloth such as nylon or tetron with a rubber-coated waterproof sheet or a high sheet. A high-strength aramid-based or polyamide-based high-density synthetic fiber woven fabric may be selected according to the design conditions of the water tank. Preferably, the warp direction of the sheet material is aligned with the height direction of the water tank, and each wall element is formed by adhesively stitching the material sheet according to the width of the wall surface,
Further, the opposing connecting members 33 can be sewn together to form the isolated water tank body 30. When only synthetic fiber woven fabric or non-woven fabric is used, it is possible to manufacture a considerably wide sheet material, and it is also possible to form a single sheet without sewing, and it is possible to improve the quality against damage and the like. . In this case, since the internal and external pressures of the water tank can be kept constant, the risk of permeation can be ignored. In addition, although not shown, in the vicinity of the upper and lower mounting portions of the upper main wall member 31 or the lower main wall member 32, a means of double-adhering the sheets may be provided in order to resist external force due to its own weight or tidal current. .

The upper main wall member 31, the lower main wall member 32, and the connecting member 33 described above are preferably made of a sheet material of the above-mentioned material, but are not particularly limited to such materials. Alternatively, in some cases, one or two of the three members may be made of the synthetic fiber woven cloth or the like, and in any case, a thin sheet material that is easily deformable may be used.

As shown in FIG. 1, a drainage port 38 of an appropriate size and an appropriate number may be provided near the water surface of the top opening 34 to discharge excess water such as rainwater. In this case, although not shown, the upper end of a flap or the like formed of a sheet material is sewn on the outside, and the flap is brought into close contact with the surface of the aquarium wall by the water pressure from the outside, so that the intrusion of water from the outside is minimized. A valve may be provided.

As shown in FIGS. 1 and 6, the floating body 20 is attached to the outer peripheral surface of the top opening 34 of the aquarium body 30, and this attachment is made to the substantially octagonal opening formed in the floating body 20. The upper main wall member 31 is attached along the upper main wall member 31, and the angled reinforcing member 21 is fastened with bolts or the like. The floating body 20 has a work place plate 22 on the upper surface thereof, and the float 2 is provided below the work place plate 22.
3 is provided and is supported and floated on the water surface, but in some cases, the workplace plate 22 and the float 23 may be integrally configured.

The fixing means 40 attached to the bottom of the water tank body 30 has a weight body 42 such as an anchor bolt depending from a frame body 41 provided at the bottom of the water tank 10 and holding the shape of the bottom opening 35. The water tank 10 may be fixed by forming the weight 42 into the water bottom L, but preferably the concrete anchor fixed to the water bottom L as shown in FIG. 43 to one end of the cable 44,
Alternatively, the other end may be connected to the floating body 20, the frame body 41, or the like.

A plurality of the water tanks 30 may be installed together, and a means such as a ship or a floating jetty may be used to make a round trip from the coast to the water tank 30. Furthermore, the floating body 20 may be moored by a mooring device in consideration of weather conditions and the like.

Reference numeral "45" in FIG. 1 indicates the reinforcing body 21.
This is a wire that connects the frame body 41 with the frame body 41. When the water tank is transported or installed, the weight of the water tank is supported thereby, and unnecessary force is not applied to the water tank.

Next, the operation of the isolated water tank will be described. Now
It is assumed that the farm is at high tide and the connecting member 33 is folded inside (states of FIGS. 7 and 8). In this case, the horizontal cross section of the intermediate portion C is a square, and the cross sectional area is the smallest. From this state, when the water level goes down and the water level drops to the intermediate water level, the connecting member 3
3 gradually opens, and the intermediate portion C also bulges by that amount (Fig. 9).
And FIG. 10).

When the water level is further lowered and the tide is low, the height of the aquarium itself is contracted, but the connecting member 33 is maximally expanded, the middle portion C is maximally expanded, and the horizontal cross-sectional area is also maximal (Fig. 11 and FIG. 12), the horizontal cross section changes to an octagonal shape (FIG. 4).

Even if the water level fluctuates in this way, the floating body 20 floating above the water surface moves up and down with the fluctuation of the water level, and with the vertical displacement of the floating body 20, the upper main wall member 31 and the lower main wall member 31. Since the intermediate portion C connecting with the wall member 32 is bent outward and the connecting member 33 only expands and contracts, the inner volume of the water tank is kept substantially constant.

Moreover, since the water pressures inside and outside the water tank 10 are balanced, an excessive water pressure does not act on the wall surface of the upper main wall member 31, the lower main wall member 32, or the connecting member 33, and the wall surface is external. It only needs to have the strength necessary to simply separate the water body from the inner water body.

On the contrary, when the water level rises toward the high tide from the state described above, the floating body 20 rises, and following this, the water tank itself extends in the height direction, and the bent portion 37 shown by the broken line gradually. Connecting member 3
As shown in FIG. 2 (FIGS. 7 and 8), when the water tank 3 is folded inward and the high tide is reached and the aquarium itself is maximized, the adjacent end portions of the main wall members 31 and 32 are closest to each other. , The cross section of the intermediate portion C returns to the original regular quadrangle, and the cross sectional area becomes the minimum.

Since the floating body 20 also moves up and down in accordance with the water level in this way, the work site plate 22 is always at a constant height above and below the water surface inside and outside the water tank, which improves workability in performing work.

The present invention is not limited to the above-mentioned embodiments, but can be variously modified within the scope of the claims. For example, the isolated water tank 30A as shown in FIGS. 13 and 14 may be used. This isolated water tank 30A
Has a top opening 31 and a bottom opening 32 formed in a regular quadrangle, and an intermediate section C having an octagonal horizontal sectional shape. However, the points different from the above-described embodiment are the shapes of the main wall member and the connecting member. In this embodiment, the main wall member has a rectangular shape and the connecting member has a rhombic shape, and the portion connected to the end portion of the main wall member has an extremely narrow width.

According to this water level following type isolation water tank 30A,
At low tide, the water tank itself contracts in the height direction, the connecting member 33 projects outward, and the intermediate portion C swells. Further, at the time of high tide, the connecting member 33 shown by a chain line in FIG.
Lean toward each other, fold inside and fold, and the aquarium itself returns to its original height.

[0034]

As described above, according to the present invention, even if the water level fluctuates, the upper main wall member and the lower main wall member are bent outwardly and connected with the vertical displacement of the floating body. Since the member expands and contracts, the internal volume of the water tank is kept substantially constant.
Further, as a result of this, the water pressure inside and outside the water tank is balanced, so that excess water pressure does not act on the wall surface, and the wall surface only needs to have the strength necessary to simply separate the outer water area and the inner water area. . Further, since the water surface in the water tank can be maintained at substantially the same level as the water level in the external water area, workability in the water tank is improved.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of the present invention,

FIG. 2 is a partially cutaway perspective view showing a conceptual configuration of the isolated water tank body;

3 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 4 is a perspective view similar to FIG. 2 showing a bulging state, and a partially broken perspective view showing a conceptual configuration of a water level tracking type isolated water tank wall according to the present invention;

FIG. 5 is an explanatory diagram of Simpson's formula,

FIG. 6 is a partial cross-sectional side view showing a state in which the present invention is supported on a floating body and the bottom is fixed;

FIG. 7 is a conceptual front view of the present embodiment at high tide,

FIG. 8 is a plan view of the same,

FIG. 9 is a conceptual front view of the present invention at an intermediate water level,

FIG. 10 is a plan view of the same,

FIG. 11 is a conceptual front view of the present embodiment at low tide,

FIG. 12 is a plan view of the same,

FIG. 13 is a perspective view showing a conceptual configuration of another embodiment of the present invention,

FIG. 14 is a perspective view similar to FIG. 1, showing the same bulging state.

[Explanation of symbols]

20 ... Floating body, 31 ... Upper main wall member, 32 ... Lower main wall member, 33
... connecting member, 34 ... top opening,
35 ... bottom opening, 36 ... bottom plate,
37 ... bent part, 38 ... drainage port,
40 ... Fixing means, 43 ... Anchor,
44 ... Cable, C ... middle part.

Claims (5)

[Claims] 1. An isolated water tank in which a top opening is supported by a floating body floating above the water surface where the water level fluctuates so that the top opening is located above the water surface and a bottom portion is fixed to the water bottom by a plurality of flat plates. A top opening formed by continuously connecting the upper sides of the upper main wall members to each other in a polygonal shape;
Deformation for connecting a bottom opening formed by continuously connecting the lower sides of a plurality of flat lower main wall members to each other in a polygonal shape and the side edges of the main wall member and the lower main wall member. And a connecting member having a wide middle portion, the floating body is attached to the outer periphery of the top opening, a frame is provided on the outer periphery of the bottom opening, and the lower side and the lower main portion of the upper main wall member are provided. A water level following type isolation tank characterized in that the upper side of the wall member is connected outwardly so as to be bendable. 2. The water level following type isolated water tank according to claim 1, wherein the top opening or the bottom opening is formed such that the side lengths thereof are alternately long and short, and the short side portions are constituted by the connecting member. 3. The upper and lower main wall members have a trapezoidal shape or a rectangular shape, and the connecting member is provided between the upper main wall members or between the lower main wall members and has a bent portion along the center. The water level following type isolation tank according to claim 1, which is configured to have. 4. The upper main wall member, the lower main wall member, and at least one of the connecting members are made of synthetic fiber woven cloth or non-woven cloth, or a sheet material having a waterproof coating thereof. Item 3. A water tank that follows the water level according to items 1 to 3. 5. A water level following type isolated water tank according to claim 1, wherein the top opening is provided with a drain port having a check valve for preventing inflow of water from the outside near the water surface. .