JP2006161533A - Water storage system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water storage system by which a large amount of service water can be stockpiled stably by effectively preventing damage to a flexible storage tank arranged in the water. <P>SOLUTION: A protection space 69 is formed in the water 7 by a net member 67 fitted to a moored float 49. The flexible storage tank 1 storing the service water 3 is arranged in the protection space to stockpile the service water 3. Since the flexible storage tank 1 is surrounded by the net member 67, deformation of the flexible storage tank 1 caused by waves and tides generated inside a stockpile water area 5 is limited to the inside of the protection space, and the flexible storage tank 1 is effectively prevented from being damaged by the contact of rocks and rock reefs existing around the stockpile water area 5. The net member 67 also prevents a driftwood, etc., from coming into contact with the flexible storage tank 1, and the damage of the flexible storage tank 1 is surely prevented. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention stores water in a flexible storage tank configured to be deformable at least part of its outer shape, and arranges the flexible storage tank in the water of a reserve water area set in a sea, a lake, a pond or the like. The present invention relates to a water storage system for storing water.

  Conventionally, water such as fresh water, drinking water, industrial water, and deep sea water is stored in a flexible storage tank formed of a flexible sheet such as rubber or nylon, and the flexible storage tank is used for sea, lake, pond, etc. There has been proposed a water storage system that stores water in the water (see, for example, Patent Document 1).

JP 2004-156283 A (FIGS. 1, 2, and 5)

  The greatest feature of the flexible storage tank described above is its flexibility. Even if an external force such as waves or tidal currents acts on the flexible storage tank placed in the water, the flexible storage tank deforms according to the external force. Can drain external force. For this reason, it is possible to prevent the occurrence of problems such as a large stress concentrated on a part of the tank and the tank being damaged.

  However, when the flexible storage tank is freely deformed, there is a risk that a part of the flexible storage tank comes into contact with and breaks rocks, reefs, or coasts existing in water. In addition, driftwood, drifting objects, and the like flow in the sea, lakes, ponds, and the like, and when these flow into the storage area where water is stored and collide with the flexible storage tank, the flexible storage tank may be damaged. Thus, in a water storage system that stores water using a flexible storage tank that deforms its outer shape according to external force, it is possible to prevent damage to the flexible storage tank and stably store a large amount of water in the water. It has become a big issue.

  This invention is made in view of the said subject, and it aims at providing the water storage system which can prevent the damage of the flexible storage tank arrange | positioned underwater effectively, and can stockpile a large amount of water stably. And

  The present invention stores water in a flexible storage tank configured to be deformable at least part of its outer shape, and arranges the flexible storage tank in the water of a reserve water area set in a sea, a lake, a pond or the like. In order to achieve the above purpose, a mooring floating body arranged in the water storage area and a protective space attached to the mooring floating body and surrounding the flexible storage tank in the water of the water storage area are formed. And a flexible storage tank is disposed in the protection space.

  In the invention configured as described above, a mooring floating body is arranged in a stockpiling water area for stocking water (for example, a water area set in the sea, a lake, a pond, etc.), and a net member is attached to the mooring floating body, and the stockpiling water area A protective space is formed in the water. This protection space is a space for surrounding the periphery of the flexible storage tank, and a flexible storage tank that stores water is disposed in the protection space, and water storage is performed. As described above, in this water storage system, the flexible storage tank is surrounded by the net member, so that the flexible storage tank is deformed by waves or tides generated in the reserve water area, but the deformation is within the protection space. The flexible storage tank is prevented from coming into contact with the rocks and reefs existing around the reservoir area and being damaged. In addition, since the net member is attached to the mooring floating body, the net member and the flexible storage tank surrounded by the net member are kept in the predetermined reserve water area without drifting from the reserve water area due to waves or tidal currents. be able to. In addition, since the net member surrounds the flexible storage tank, even if driftwood or drifting material arrives in the reserve water area, the net member prevents the driftwood from contacting the flexible storage tank and ensures damage to the flexible storage tank. Can be prevented.

  Here, in order to stably arrange the flexible storage tank in the protection space formed by the net member, the flexible storage tank is levitated from the protection space by being attached to the mooring floating body in a state of being arranged above the protection space. You may further provide the control member which controls doing. Thereby, it is possible to prevent the flexible storage tank from jumping out of the protection space by buoyancy acting on the flexible storage tank, and to stably arrange the flexible storage tank in the protection space. Moreover, you may comprise a part of flexible storage tank with the rigid body whose specific gravity is heavier than water. For example, a pair of rigid bodies having a specific gravity heavier than water is arranged in the vertical direction, and a tank structure formed by connecting a pair of rigid bodies with a nylon-based or rubber-based flexible sheet is used as a flexible storage tank. Can do.

  In addition, an ups and downs adjusting means for adjusting ups and downs of the mooring floating body may be further provided. In this case, the following operational effects are obtained. First, as the first point, if the stockpile area is affected by wind and waves due to the influence of typhoons, the mooring body is submerged and the net member (and regulating member) and the flexible storage tank are integrally submerged in water. it can. As a result, the influence of wind and waves on the net member (and the regulating member) and the flexible storage tank can be reduced, and damage to the entire water storage system as well as the flexible storage tank can be prevented. In order to suppress the adverse effects on the water storage system caused by wind waves during stormy weather in this way, it is desirable to submerge at a depth that is deeper than the so-called “movement limit water depth”, which is the limit water depth that the wave motion can reach.

  As a second point, for example, in the summer, the temperature of the water increases as the temperature rises, but the mooring floating body sinks and the net member (and regulating member) and the flexible storage tank are integrally submerged in water. By doing so, the water temperature around the flexible storage tank is lowered, and the water in the flexible storage tank is cooled accordingly. Accordingly, the temperature of the water can be lowered compared to a water storage system that stores water on land or in the vicinity of the water surface. In addition, since the temperature change in water is smaller than on land or in the vicinity of the water surface, the temperature of the irrigation water can be kept almost constant. In particular, when the water stored in the flexible storage tank is used as industrial water, industrial water with low temperature fluctuation and little temperature fluctuation can be obtained. Therefore, a water storage system in which the flexible storage tank is submerged in water is beneficial. . Here, in order to control the temperature with higher accuracy, for example, the measuring means for measuring the temperature of the water stored in the flexible storage tank, and the amount of floating of the moored floating body is adjusted by the rising and falling adjustment means based on the measurement result by the measuring means And you may further provide the temperature control means which controls the water temperature in a flexible storage tank.

  Furthermore, the flexible storage tank is configured to supply / drain water for supplying / draining water to / from the flexible storage tank, to supply / exhaust means for supplying / exhausting air to / from the flexible storage tank, and to drive and control the water supply / drainage means and supply / exhaust means. Water storage state control means for adjusting the water storage state of the irrigation water may be further provided. Thus, the buoyancy acting on the flexible storage tank can be adjusted by adjusting the storage state of the water in the flexible storage tank by the storage state control means, and the flexible storage tank is more stably arranged in the protective space. be able to.

  In addition, when a water supply / drainage means for supplying / draining water to / from the flexible storage tank is further provided, a pair of rigid bodies having a specific gravity heavier than water are arranged in the vertical direction, and a nylon or rubber flexible sheet In the case where a tank structure formed by connecting a pair of rigid bodies to each other is used as a flexible storage tank, both ends of the tank structure are connected to the pair of rigid bodies, and the pair of rigid bodies are brought closer to each other. An urging member for urging may be further provided. By urging the pair of rigid bodies in a direction approaching each other by the urging member in this way, pressure in the direction in which the water is stored in the flexible storage tank is applied. Therefore, it is not necessary to operate a drain pump or the like when the water supply / drainage means drains water, so that the system configuration can be simplified and energy can be saved.

  FIG. 1 is a diagram showing a first embodiment of a water storage system according to the present invention. FIG. 2 is a schematic diagram showing the operation of the water storage system of FIG. The water storage system stores fresh water, drinking water, industrial water, deep sea water, and other water 3 in a flexible storage tank 1 formed of a rubber or nylon flexible sheet, and the flexible storage tank 1 is stored in the sea. The water 3 is stored in the storage space 9 in the tank 1 by being disposed in the underwater 7 of a predetermined storage water area 5 such as a lake or a pond.

  A support plate 16 that supports three types of pipes communicating with the storage space 9 in the tank 1, that is, a supply / exhaust pipe 11, a supply / drain pipe 13, and an aeration pipe 15 is attached to the upper end of the flexible storage tank 1. It has been. These pipes 11, 13, and 15 are connected to the air supply / exhaust unit 23, the water supply / drainage unit 25, and the aeration unit 27 by piping through valves 17, 19, and 21, respectively. Further, these valves 17, 19, 21 and units 23, 25, 27 are electrically connected to a control unit 29 that controls the entire water storage system, and are configured to operate in accordance with commands from the control unit 29. Has been. That is, when the air supply / exhaust unit 23 is operated in response to a command from the control unit 29 and the valve 17 is opened, air is supplied to the storage space 9 of the flexible storage tank 1 via the air supply / exhaust pipe 11 or vice versa. Air can be exhausted from the storage space 9. Further, when the water supply / drainage unit 25 is operated in accordance with a command from the control unit 29 and the valve 19 is opened, water is supplied to the storage space 9 of the flexible storage tank 1 via the water supply / drainage pipe 13, or conversely, the storage space. Water can be drained from 9. A rectifying plate 31 is attached to the tip of the water supply / drainage pipe 13.

  FIG. 3 is an enlarged view showing the tip of the water supply / drainage pipe. The rectifying plate 31 has a disk shape having a plane size wider than the front end of the water supply / drainage pipe 13, and is connected to the front end of the water supply / drainage pipe 13 by three stays 33. For this reason, at the time of water supply, the water 3 supplied through the water supply / drainage pipe 13 collides with the rectifying plate 31 and is depressurized as shown by the solid line arrow in FIG. It is guided radially and uniformly. Therefore, the water 3 can be gently supplied without applying excessive water pressure to the flexible storage tank 1.

  When the water supply process is executed in this way, earth and sand may be included in the water flow of the irrigation water 3 and may sink to the bottom surface of the storage space 9. In this embodiment, since the rectifying plate 31 is attached to the tip of the water supply / drainage pipe 13 as described above, the following effects can be obtained during drainage. That is, during drainage, the water 3 passes between the stays 33 and is sucked and drained from the tip end of the water supply / drainage pipe 13, whereas sediment 35 such as earth and sand settling on the bottom surface of the storage space 9 is As shown by the broken line arrow in FIG. 5B, the water flow of the irrigation water 3 tries to move upward toward the tip end of the water supply / drainage pipe 13, but the wicking water flow from the bottom is blocked by the rectifying plate 31, Since the water flow is from the direction, the water flow near the bottom surface becomes calm and the stirring movement of the sediment is controlled. In this way, the lower surface of the rectifying plate 31 (the surface facing the bottom surface of the storage space 9) prevents the sediment 35 from being mixed into the water 3 drained from the water supply / drainage pipe 13.

  Returning to FIG. 2, the description will be continued. As described above, the amount of water 3 stored in the flexible storage tank 1 is controlled in accordance with a command from the control unit 29, and the amount of air remaining in the storage space 9 is controlled. In other words, the water storage state of the water in the flexible storage tank 1 can be adjusted by the drive control of the air supply / exhaust unit 23 and the water supply / drainage unit 25 by the control unit 29, and the control unit 29 can control the “water storage state control” of the present invention. Functions as a means.

  Further, when the aeration unit 27 is operated in accordance with a command from the control unit 29 and the valve 21 is opened, the aeration ring 37 is supplied to the flexible storage tank 1 via the aeration pipe 15 and attached to the tip of the pipe 15. The air is jetted out and forcibly supplied to the service water 3 stored in the flexible storage tank 1, and aeration is performed on the service water 3. This makes it possible to compensate for the shortage of dissolved oxygen accompanying the oxidation of organic substances contained in the water 3. In addition, when performing aeration, it is desirable to manage the water storage state of the water in the flexible storage tank 1 by performing the exhaust process by the air supply / exhaust unit 23 corresponding to this.

  Further, as shown in FIG. 2, a lower end plate 41 provided with an opening 39 for discharging sand and draining is attached to the lower end of the flexible storage tank 1. The opening 39 communicates with the storage space 9 of the flexible storage tank 1 and is provided to discharge residual water remaining in the storage space 9 and sedimentary sediment such as earth and sand from the flexible storage tank 1 as described above. Is. In this embodiment, the inclined portion 43 is provided on the upper surface of the plate 41 (the surface facing the storage space 9), and when the storage space 9 is washed as will be described later, residual water and sedimentation existing in the storage space 9. The earth and sand are guided to the opening 39 to facilitate the discharge process. Moreover, the water stop cap 45 for keeping the opening 39 closed is detachably attached. In order to clean the storage space 9 in this manner, the support plate 16 is provided with a work passage (not shown) for an operator to access the storage space 9 and the work passage. An opening / closing door 47 (FIG. 1) is provided for opening and closing the door.

  In this embodiment, as shown in FIG. 1, a grid-like mooring body 49 having a square planar shape is provided in a stockpiling water area 5 for stocking water 3. The shape of the mooring floating body 49 is not limited to this, and may be arbitrary. For example, the shape may be a polygonal shape or a circular shape, and the same applies to the shape of the protective space described later correspondingly. . The grid-like mooring floating body 49 is provided with bowl-shaped ballast tanks 53 at predetermined intervals on the lower surface of the periphery of a frame body 51 in which a structural material such as a steel plate or a hollow steel pipe is framed. Each ballast tank 53 is connected to the rise and fall adjustment unit 55 by piping. When the rise and fall adjustment unit 55 is operated in accordance with a command from the control unit 29, compressed air is supplied from the rise and fall adjustment unit 55 to each ballast tank 53. The grid-like mooring floating body 49 floats halfway on the water surface 57 and is in a half-sunk state (FIG. 2A). On the contrary, when the floatation / sink adjustment unit 55 is actuated to cause the water in the reserve water area 5 to flow into each ballast tank 53, the grid-like mooring floats 49 will be submerged (FIG. 2B). In this way, the rise / fall adjustment unit 55 functions as the “floating / sink adjustment means” of the present invention. In addition, since the floating control of the floating body 49 using the ballast tank 53 is basically the same as that of the submarine, the description is omitted here.

  A mooring eye (not shown) is provided on one side surface (left hand side in FIG. 1) of the mooring floating body 49 configured as described above, and the mooring floating body 49 is attached to the mooring rope 59 attached to the mooring eye. Moored on mooring pole 61. The mooring pole 61 extends substantially vertically from an anchor body 65 fixed to the seabed 63. In this embodiment, the mooring floating body 49 is moored by the mooring pole 61. However, the mooring buoy is locked to a connecting member such as a chain extending from the anchor body 65, and the mooring floating body 49 is moored to the mooring buoy. You may comprise as follows. In this embodiment, the mooring method is not limited to this, but the mooring method is not limited to this. For example, a mooring eye is provided on the other side surface of the mooring floating body 49 (right hand side in FIG. 1). You may comprise so that the lattice-like mooring floating body 49 may be moored in the reserve water area 5 at two places.

  A net member 67 made of a flexible material is attached to the lower surface of the grid-like mooring floating body 49 over the entire circumference of the mooring floating body 49 inside the ballast tank 53. By providing the net member 67 over the entire circumference of the mooring float 49 in this way, a space 69 surrounded by the net member 67 in the underwater 7 is formed. In this embodiment, the space 69 (FIG. 2) formed in this way is used as the “protection space” of the present invention, and the flexible storage tank 1 storing the water 3 is disposed in the protection space 69. Therefore, it is necessary to configure the mooring float 49 according to the design dimensions of the flexible storage tank 1. Here, a chain, a weight, or the like may be attached to the net member 67 made of a flexible material so that the shape of the protective space 69 is adjusted in the water 7.

  Further, as shown in FIG. 1 and FIG. 2, a plurality of stays 71 are bridged in a lattice pattern on the mooring floating body 49 inside the frame body 51, and are positioned above the protection space 69. For this reason, the stay 71 forcibly presses the flexible storage tank 1 arranged in the protection space 69 to rise due to the buoyancy acting on the flexible storage tank 1, thereby preventing the flexible storage tank 1 from jumping out of the protection space 69. The flexible storage tank 1 can be stably disposed in the protective space 69. Thus, in this embodiment, the plurality of stays 71 function as the “regulating member” of the present invention, but a hollow steel pipe, a steel plate, or the like may be used instead of the stay 71. The circular opening 73 formed in the central portion of the restricting member by the stay 71 is an opening for installing the flexible storage tank 1 in the protection space 69 or conversely collecting the flexible storage tank 1 from the protection space 69. For example, one having an inner diameter slightly larger than the outer dimension of the support plate 16 can be formed. Further, a regulating member constituted by the stay 71 or the like may be configured to be detachable from the mooring floating body 49. For example, the regulating member is removed when the flexible storage tank 1 is carried in and out, while the water 3 is stored. In this case, it is not necessary to provide an opening in the regulating member.

  Next, the operation of the water storage system configured as described above will be described. The mooring floating body 49 is transported to the preset water storage area 5 and floated in a half-sunk state on the water surface 57 and moored on the mooring pole 61. Then, as shown in FIG. 1, the flexible storage tank 1 that has not been stored and is deflated by removing the air from the storage space 9 is carried into the protective space 69 through the opening 73. Then, the water supply / drainage unit 25 is operated to supply water 3 to the tank 1. In this way, a predetermined amount of water 3 is supplied into the tank 1, and stockpiling of the water 3 in the water 7 is started (FIG. 2 (a)). At this time, in parallel with the water supply process, the control unit 29 controls the drive of the air supply / exhaust unit 23 to adjust the amount of air in the flexible storage tank 1 to control the inflation speed and shape of the tank 1. It is possible to prevent the tank 1 from being damaged by preventing the flexible storage tank 1 from generating discontinuous portions such as wrinkles and sagging.

  Here, the water 3 is stored and stored in the tank 1 in the floating state. However, the floating mooring body 49 and the flexible storage tank 1 are integrally submerged by operating the floating / sink adjustment unit 55 to be completely submerged (or The water 3 may be stockpiled in a (submerged) state. In this case, the following effects can be obtained. First, as the first point, when the storage water area 5 becomes intensely affected by wind and waves due to the influence of a typhoon or the like, an unexpected external force may act on the mooring floating body 49 and the flexible storage tank 1, possibly causing damage. come. Therefore, as shown in FIG. 2B, the lattice mooring floating body 49 and the flexible storage tank 1 are submerged integrally. Then, the influence of the wind and waves on the grid-like mooring floating body 49 and the flexible storage tank 1 can be reduced, and the entire storage system as well as the flexible storage tank 1 can be prevented from being damaged. As a second point, when the water 3 is stocked in the floating state as shown in FIG. 2 (a), it is easily affected by the temperature, and particularly in the summer, the water 3 Although the temperature rises, the temperature rise can be suppressed by submerging the flexible storage tank 1. Moreover, since the temperature change is small in water compared to the land and the vicinity of the water surface, the temperature of the water 3 can be kept substantially constant.

  On the other hand, when the water 3 stored as described above is taken out, the water supply / drainage unit 25 is operated to drain the water from the storage space 9. In parallel with this drainage treatment, the air supply / exhaust unit 23 is driven. By controlling and adjusting the amount of air in the flexible storage tank 1, the bulging state of the tank 1 and the buoyancy acting on the flexible storage tank 1 can be controlled. Further, if necessary, the water supply / drainage unit 25 can be operated to supply new water 3 to the storage space 9 to increase the stockpiling amount.

  Thus, while the supply and drainage of the water 3 are repeated, the flexible storage tank 1 needs to be replaced or cleaned internally. Therefore, in this embodiment, replacement processing and internal cleaning processing are performed as follows. First, as shown in FIG. 4A, the water supply / drainage unit 25 is operated to forcibly drain water from the storage space 9, and in parallel with this drainage treatment, the drive of the air supply / exhaust unit 23 is controlled to perform flexible storage. The air is forcibly exhausted from the tank 1. Thereby, the flexible storage tank 1 is deflated while leaving residual water on the bottom surface. And if it is deflated to the extent which can pass the opening 73, as shown in the figure (b), the flexible storage tank 1 will be pulled up from the underwater 7 with heavy machines, such as a crane. Further, the water stop cap 45 is removed, and residual water and sedimentary sediment (residual sand, residual soil, etc.) are discharged from the tank 1 through the opening 39 for draining and draining. At this time, the driving of the air supply / exhaust unit 23 may be controlled so that air is forcibly supplied to the flexible storage tank 1. When the collection of the tank 1 is completed in this way, a new flexible storage tank 1 is arranged in the protection space 69. The subsequent operation is as described above.

  When the inside of the flexible storage tank 1 collected as described above is washed, as shown in FIG. 5, a plurality of upper shoulder portions of the flexible storage tank 1 are connected to the auxiliary ring 75 by lifting with wires. The lifting auxiliary ring 75 is lifted by a heavy machine such as a crane. Thus, the tank 1 is hold | maintained in the state expanded by performing multipoint lifting. Thereafter, the operator opens the opening / closing door 47 (FIG. 1) and enters the inside of the tank 1 through the work passage. Then, the inside of the tank 1 is washed. When the internal cleaning process is completed, the worker goes out of the tank 1 through the work passage.

  As described above, according to this embodiment, the protective space 69 is formed in the water 7 by the net member 67 attached to the mooring float 49, and the flexible storage tank 1 storing the water 3 is disposed in the protective space 69. And since the water 3 is stockpiled, the following effects are obtained. That is, in this water storage system, since the periphery of the flexible storage tank 1 is surrounded by the net member 67, the flexible storage tank 1 is deformed by waves or tides generated in the reserve water area 5, but the deformation is protected space. 69. Therefore, it is possible to effectively prevent the flexible storage tank 1 from being damaged due to contact with rocks or reefs existing around the reserve water area 5. Further, since the net member 67 is attached to the mooring floating body 49, the net member 67 and the flexible storage tank 1 surrounded by the net member 67 can be reliably retained in the reserve water area 5. Further, since the net member 67 surrounds the flexible storage tank 1, even if driftwood or drifting material has flown into the reserve water area 5, the net member 67 prevents the driftwood or the like from contacting the flexible storage tank 1, so that flexible storage is possible. Damage to the tank 1 can be reliably prevented.

  By the way, when using the water 3 stored by the flexible storage tank 1 as industrial water, the water storage system concerning the said embodiment is useful. The reason and operation will be described below with reference to FIG. The main purpose of stockpiling industrial water is to (1) absorb time fluctuations in water usage for quantitative supply, and (2) avoid the effects of water leakage accidents and water outages. Therefore, in order to achieve these purposes, for example, storage for about 12 hours is required. Therefore, the following problems have occurred when using a reservoir and an industrial dam as in the past. First of all, it is necessary to secure land for the reservoir and dam. Further, in summer, the water temperature rises due to direct sunlight, and in winter, there is a risk of freezing, and the water temperature varies greatly depending on the temperature. In particular, one of the main purposes of industrial water is cooling water, but the rise in water temperature in summer is a serious problem. Furthermore, in storage systems that store large volumes of water in distribution reservoirs or dams, if the onshore storage structures such as distribution reservoirs or dams are damaged due to disasters such as earthquakes, the stored industrial water is not controlled. There is a risk of a secondary disaster being discharged.

  On the other hand, the said problem can be solved at a stretch by performing the stockpiling process of the industrial water demonstrated below using the water storage system of FIG. That is, in this embodiment, it is not necessary to secure a site for stockpiling by using, for example, the ocean as the stockpiling water area 5. Further, industrial water is taken from the industrial water channel and supplied to the flexible storage tank 1 that is submerged in the sea 7 (FIG. 6A). Thereby, while reducing the temperature of the industrial water 3 to the same temperature as the seawater 7, it is maintained at that temperature. This is because the temperature of industrial water taken from an industrial water channel usually rises due to the influence of temperature, direct sunlight, etc., and particularly in the summer, the influence is most affected and the water temperature becomes high (temperature T1 ) Is stored in the flexible storage tank 1 to be cooled with seawater to a seawater temperature T2 ((b) in the figure). In addition, since the flexible storage tank 1 is fully immersed (or submerged), it is not affected by the temperature or direct sunlight, and the temperature rise caused by them can be suppressed. Further, since the temperature change is small in the sea, the temperature of the industrial water 3 can be maintained at a substantially constant value T2. Then, if necessary, the industrial water 3 is drained from the flexible storage tank 1 and supplied to the factory ((c) in the figure). Therefore, the industrial water 3 having a low temperature and a substantially constant temperature can be stably supplied, and the quality of a product manufactured using the industrial water 3 can be improved. Further, even if the flexible storage tank 1 is damaged due to a disaster or the like, the industrial water 3 is discharged into the seawater, so that no secondary disaster occurs. Furthermore, since the flexible storage tank 1 is submerged in seawater, there is little influence on the landscape and the environment.

  In this embodiment, the flexible storage tank 1 is simply placed in the submersion, but the temperature T2 can be controlled with higher accuracy by utilizing the difference in seawater temperature depending on the water depth. For example, a measuring means for measuring the temperature of the water 3 stored in the flexible storage tank 1 is provided, and the water temperature T2 in the flexible storage tank 1 is controlled by adjusting the amount of floating of the mooring floating body 49 based on the measurement result. You may do it. Further, the temperature T2 of the industrial water may be adjusted by controlling the amount of floating of the mooring float 49 according to the temperature required from the factory.

  FIG. 7 is a view showing a second embodiment of the water storage system according to the present invention. This embodiment is greatly different from the first embodiment in that the structure of the flexible storage tank 1 and the use of this structure make it unnecessary to install a regulating member such as the stay 71. Since other configurations are basically the same as those of the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.

  In this embodiment, the flexible storage tank 1 is comprised with the tank structure which has a bellows shape. More specifically, an upper plate 77 and a lower plate 79 formed of a rigid body having a specific gravity heavier than water are spaced apart from each other in the vertical direction, and a pair of plates 77, 79 are interconnected. The flexible sheet 81 is formed with a plurality of folds, and the storage space 9 of the flexible storage tank 1 can be changed by relative movement of the upper plate 77 and the lower plate 79. Corresponding to the adoption of the bellows structure, a flexible intermediate portion 83 is interposed in the water supply / drainage pipe 13 and the aeration pipe 15 so as to expand and contract in accordance with the separation / proximity movement operation of the plates 77 and 79. It is configured.

  When the flexible storage tank 1 configured as described above is used, when the tank 1 is carried into the protection space 69, the flexible storage tank 1 sinks to the lowermost part of the protection space 69 due to the weight of the lower plate 79, and the upper plate. 77 also moves close to the lower plate 79 by its own weight. Thereby, the tank 1 will be arrange | positioned reliably in the protection space 69 (Fig.7 (a)). At this time, according to the proximity movement of the upper plate 77 to the lower plate 79, the pipe is bent at the intermediate portion 83 of the water supply / drainage pipe 13 and the aeration pipe 15, and the pipes 13 and 15 contract vertically.

  Then, when the water supply / drainage unit 25 is operated to supply the water 3 to the tank 1, a predetermined amount of the water 3 is supplied into the tank 1 and stockpiling in the water 7 is started ((b) in the figure). In this embodiment, as in the first embodiment, in parallel with the water supply process, the control unit 29 controls the drive of the air supply / exhaust unit 23 to adjust the air amount in the flexible storage tank 1. Thus, the expansion speed of the tank 1 can be controlled. Alternatively, aeration may be performed on the service water 3 stored in the tank 1 by supplying air to the flexible storage tank 1 via the aeration pipe 15. Further, when the flexible storage tank 1 configured as described above is used, the tank 1 can be disposed in the protection space 69 by the dead weight of both the plates 77 and 79, so that a regulating member is not necessary. .

  The present invention is not limited to the above-described embodiment, and various modifications other than those described above can be made without departing from the spirit of the present invention. For example, in the above embodiment, the flexible storage tank 1 is surrounded by the single net member 67 to protect the tank 1. However, the flexible storage tank 1 may be surrounded by multiple net members.

  Moreover, in the said embodiment, although the flat plate-shaped rectification | straightening plate 31 is attached to the front-end | tip of the water supply / drainage pipe 13, you may finish the upper surface of the rectification | straightening plate 31 in a cone or a pyramid shape, and form an inclined surface. In this case, even if sedimentation sand or the like reaches the upper surface of the rectifying plate 31, it can be prevented from sliding off the rectifying plate 31 along the inclined surface and accumulating on the plate 31.

  Moreover, in the said embodiment, although water supply and drainage are performed using the water supply / drainage pipe 13, you may provide a water supply exclusive pipe and a drainage exclusive pipe separately. The same applies to the supply and exhaust pipe 11.

  Moreover, in the said embodiment, although the aeration process is performed within the flexible storage tank 1 while stocking water, this aeration process can be performed as needed. In addition to the aeration treatment, chlorine may be injected as a pretreatment for substances such as iron and manganese. In order to uniformly mix chlorine in the water, a water supply treatment is performed simultaneously with the chlorine injection. It is desirable to promote stirring of water in the tank 1.

  In the second embodiment, an urging member such as a coil spring that urges the upper plate 77 and the lower plate 79 in a direction approaching each other may be provided. FIG. 8 is a diagram showing a modification of the second embodiment. In this modification, as shown in the figure, both ends are connected to an upper plate 77 and a lower plate 79, respectively, and a coil spring 85 is provided to urge the upper plate 77 and the lower plate 79 in a direction approaching each other. ing. Thus, in this modification, the coil spring 85 functions as the “biasing member” of the present invention.

  When the flexible storage tank 1 configured as described above is carried into the protection space 69, the tank 1 is reliably arranged in the protection space 69 as in the second embodiment (FIG. 8A). For example, when the control unit 29 opens the valve 87 and operates the water supply / drainage unit 89 to supply the water 3 to the tank 1, the upper plate 77 and the lower plate 79 resist the urging force of the coil spring 85 by this water supply pressure. When the water 3 is supplied into the tank 1 and the valve 87 is closed, the stockpile in the water 7 is started ((b) in the figure). In this state, a pressure for draining the water 3 in the tank 1 is applied by the urging force of the coil spring 85. When the valve 87 is opened to drain the water 3 from the tank 1, the upper plate 77 and the lower plate 79 approach each other by the urging force of the coil spring 85, and the water 3 is supplied to the water supply / drainage pipe 13 and the accompanying movement. Drained through the valve 87. Therefore, when the water supply / drainage unit 89 drains the water 3, it is not necessary to operate a drain pump or the like, so that the system configuration can be simplified and energy can be saved.

  In this modified embodiment, two coil springs 85 are provided, but the present invention is not limited to this, and one or three or more coil springs 85 may be provided. In this modification, the coil spring 85 is provided inside the flexible sheet 81 (tank 1), but may be provided outside. The valve 87 may be manually operated. Further, the member is not limited to the coil spring 85 and may be any member that urges the upper plate 77 and the lower plate 79 in a direction approaching each other.

  The present invention can be applied to all water storage systems that store water by arranging flexible storage tanks that store water in water such as seas, lakes, and ponds.

It is a figure showing a 1st embodiment of a water storage system concerning this invention. It is a schematic diagram which shows operation | movement of the water storage system of FIG. It is an enlarged view which shows the front-end | tip part of a water supply / drainage pipe. It is a schematic diagram which shows the collection | recovery procedure of a flexible storage tank. It is a schematic diagram which shows the internal washing | cleaning procedure of a flexible storage tank. It is a schematic diagram which shows an example of the utilization aspect of the water storage system of FIG. It is a figure which shows 2nd Embodiment of the water storage system concerning this invention. It is a figure which shows the modification of 2nd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Flexible storage tank, 3 ... (Industrial) water, 7 ... Underwater, 11 ... Supply / exhaust pipe, 13 ... Supply / drain pipe, 23 ... Supply / exhaust unit, 25, 89 ... Supply / drain unit, 29 ... Control unit, 49 ... (grid) Shape) mooring floating body, 51 ... frame body, 53 ... ballast tank, 55 ... floating / sink adjustment unit, 67 ... net member, 69 ... protection space, 77 ... upper plate, 79 ... lower plate, 81 ... flexible sheet, 85 ... coil spring (Biasing member)

Claims (8)

Water is stored in a flexible storage tank that is configured to deform at least a part of its outer shape, and the flexible storage tank is stored in the water of a reserve water area set in the sea, lake, pond, etc. In the water storage system
A mooring float located in the reserve water area;
A net member attached to the mooring floating body and forming a protective space surrounding the flexible storage tank in the water of the reserve water area;
The water storage system, wherein the flexible storage tank is disposed in the protection space.   The water storage system according to claim 1, further comprising a regulating member that is attached to the mooring floating body in a state of being disposed at an upper position of the protection space and restricts the flexible storage tank from rising from the protection space.   The flexible storage tank is composed of a tank structure in which a pair of rigid bodies having a specific gravity heavier than water are arranged in the vertical direction and the pair of rigid bodies are connected to each other by a nylon or rubber flexible sheet. The water storage system according to claim 1.   The water storage system according to claim 2 or 3, further comprising an ups and downs adjusting means for adjusting ups and downs of the mooring floating body. Measuring means for measuring the temperature of the water stored in the flexible storage tank;
5. The water storage system according to claim 4, further comprising temperature control means for controlling a water temperature in the flexible storage tank by adjusting a floating amount of the mooring floating body by the floating and floating adjusting means based on a measurement result by the measuring means. Water supply / drainage means for supplying and draining water to the flexible storage tank;
Supply and exhaust means for supplying and exhausting air to and from the flexible storage tank;
The water storage system according to any one of claims 2 to 5, further comprising a water storage state control unit that drives and controls the water supply / drainage unit and the air supply / exhaust unit to adjust a water storage state of the water in the flexible storage tank. It further comprises a water supply / drainage means for feeding and draining water for the flexible storage tank,
The flexible storage tank is composed of a tank structure in which a pair of rigid bodies having a specific gravity heavier than water are arranged in the vertical direction and the pair of rigid bodies are connected to each other with a nylon or rubber flexible sheet. Has been
2. The water storage system according to claim 1, wherein each end of the tank structure is connected to the pair of rigid bodies, and further includes an urging member that urges the pair of rigid bodies toward each other.   The water storage system according to any one of claims 1 to 7, wherein the net member is made of a flexible material.

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