JP4106018B2 - Air tube type selective water intake equipment - Google Patents

Description

  The present invention relates to an air tube type selective water intake facility that can arbitrarily select a water intake depth.

  Conventionally, as a selective intake facility, intakes with different depths are formed in multiple levels on the dam's dam, and the intake water depth is selected by opening and closing the gate of each intake, or fixed to the bottom or dam A cylinder that can be moved up and down with a telescope or a semi-cylindrical gate has been proposed to perform water intake from the required water intake depth.

In addition, a water shielding film type selective water intake facility that can arbitrarily select the water intake depth by raising and lowering the water shielding film has been proposed (for example, see Patent Document 1).
JP 2002-275865 A

  However, since the conventional selective water intake equipment has a heavy structure, it has problems of poor installation and high manufacturing cost.

  Moreover, since there are many movable parts in water, there existed a problem that opening / closing control was complicated, power was applied, and there were many failures.

  Furthermore, the installation of new selective water intake facilities in existing dams is not only accompanied by significant changes in civil engineering, but also the problem that construction is difficult because it is necessary to temporarily stop discharge and sometimes dry the dam lake. was there.

  The present invention has been made to solve the above problems, and provides an air tube type selective water intake facility that is easy to install, can reduce the manufacturing cost, is simple in opening and closing control, has low power, and has few failures. This is a problem.

In order to solve the above problems, the present invention provides a vertical interval held by being fixed to the strut member to be erected on the sea bed, the ring-shaped air tube being stacked in vertical multistage between the water bottom and the water surface The water tube is provided with a water intake port at the bottom of the air tube, and the air tube expands by supplying air and closes the water intake port between adjacent air tubes. The present invention provides an air tube type selective water intake facility that is contracted by discharging air from an air tube at a water level and opens a water intake port between adjacent air tubes.

  According to a second aspect of the present invention, it is preferable that the support member is provided with a ring-shaped shelf plate that holds the air tubes in the vertical direction and supports the air tubes.

  As in claim 3, a spacer sleeve is provided on the shelf plate, and the spacer sleeve is supported by the column member so as to be vertically movable, and its length is set to the height of the vertical interval. The air tube, the shelf board, and the spacer sleeve are preferably configured as a single-stage water intake unit.

  Preferably, the shelf board is curved or bent inward.

  According to a fifth aspect of the present invention, a ring-shaped rectifying plate is attached to the upper portion of the air tube, and the rectifying plate is preferably formed in the same cross-sectional shape as the shelf plate.

  As in claim 6, the shelf board is provided with a connecting unit in which a block body is supported instead of the air tube, and the connecting unit is interposed at a necessary portion between the water intake units. A configuration is preferable.

  It is preferable that the support member is supported by a dam body.

  According to the present invention, when air is supplied to all of the ring-shaped air tubes stacked in the upper and lower stages and the air tubes are inflated, the water intake between the adjacent air tubes is closed, so that water is not taken. And if the air in the air tube at the predetermined water level is discharged and contracted, the water intake between the adjacent air tubes is opened, so water from the dam lake etc. is taken into the inside of the air tube from this water intake. Then, it is supplied to the piping etc. from the water intake at the bottom of the water.

  As described above, by using the air tube, the weight of the structure can be greatly reduced, so that the installation can be improved and the manufacturing cost can be reduced.

  In addition, since the intake port can be opened and closed only by supplying and discharging air to and from the air tube, there is no need to move the structure as in the prior art, so opening and closing control is simple, low power is required, and failure is reduced.

  Furthermore, even when a new selective water intake facility is newly installed in an existing dam, it is not necessary to drastically change civil engineering or to temporarily stop discharge, so that construction can be performed easily and in a short period of time.

  According to the second aspect, since the ring-shaped shelf plate is provided on the support member, the floating force of the air tube can be suppressed by the shelf plate so that the vertical space can be maintained and the air tube can be supported.

  According to claim 3, the spacer plate is provided with a spacer sleeve, and the spacer sleeve is supported by the column member so as to be vertically movable, and the length thereof is set to the height of the vertical interval, and the air tube, the shelf plate, and By configuring the spacer sleeve as a single-stage intake unit, the intake unit has a simple structure, and handling such as installation is further improved. Further, since the water intake unit can be moved up and down with respect to the support member by the spacer sleeve, each water intake unit can be floated on the water surface during the maintenance.

  As described in claim 4, the shelf plate is bent or bent inward, and as in claim 5, the ring-shaped rectifying plate having the same cross-sectional shape as the shelf plate is attached to the upper portion of the air tube. Water flow will be improved.

  According to the sixth aspect of the present invention, a connecting unit that supports the block body on the shelf board instead of the air tube is provided on the shelf board, and the connecting unit is interposed at a necessary location between the water inlet units, thereby providing an air The levitation force of the tube is suppressed, and the cost of the air tube can be reduced.

  According to the seventh aspect, the support of the support member becomes stronger by supporting the support member on the dam body.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  1 and 2 show an air tube type selective water intake facility 1A of the first embodiment installed in the dam lake 2. FIG. A concrete dam body 3 is provided in the dam lake 2, and a concrete water bottom 4 is provided in front of the dam body 3.

  A total of four outer strut members (rod-like bodies) 5 are erected on the water bottom 4 so as to extend above the water surface L at equiangular intervals (90 degrees in this example) on the circumference. The lower end of the member 5 is firmly fixed to the water bottom 4 with an anchor 6.

  On the inner side of each of the outer support members 5, a ring-shaped air tube 7 is provided between the water bottom 4 and the water surface L and stacked in multiple upper and lower stages (in this example, 10 stages). The bottom 4 is provided with a block body 8 for placing the lowermost air tube 7 thereon. The air tube 7 may be assumed to be inflatable / shrinkable by air supply / discharge, such as a tire tube for a large truck, and may be made of rubber or airtight cloth.

  As shown in detail in FIG. 2, each air tube 7 is supported by a stopper 9 that is inserted into the outer column member 5 and fixed by welding or the like in order to suppress the floating force when it is expanded by supplying air. Has been. It should be noted that an inner column member (bar-shaped body) 14 such as an air tube type selective water intake facility 1B of the second embodiment to be described later is erected and supported by a stopper fixed to the inner column member 14 by welding or the like. It is also possible to make it.

  A water intake 4a (see FIG. 1) is provided in the water bottom 4 located inside each of the air tubes 7.

  Each air tube 7 is connected to an air supply / discharge pipe 11 of a compressor 10 provided at an upper position or the like of the dam body 3, and is expanded by supplying air as shown in FIG. Then, the water intake 12 between the adjacent air tubes 7 is closed, and as shown in FIG. 1B, the air tube 7 is contracted by the discharge of air at a predetermined water level (in this example, the seventh step from the top). Then, the water intake 12 between the adjacent air tubes 7 is opened.

  In the case of the air tube type selective water intake facility 1A of the first embodiment, when air is supplied to all of the air tubes 7 stacked in upper and lower stages to be expanded, the water intake 12 between the adjacent air tubes 7 is used. No water is taken in because it is closed.

  And if the air of the air tube 7 of a predetermined water level is discharged, since the air tube 7 will shrink | contract as shown by 7 'in FIG.2 (b), the water intake 12 between the adjacent air tubes 7 will be opened. Therefore, the water in the dam lake 2 is taken into the air tube 7 from the water intake 12 (see arrow a), and is supplied to the piping or the like from the water intake 4 a in the bottom 4.

  As described above, the use of the air tube 7 can greatly reduce the weight of the structure, thereby improving the installation and reducing the manufacturing cost.

  Moreover, since the intake 12 can be opened and closed only by supplying and discharging air to and from the air tube 7, there is no need to move the structure as in the prior art, so the opening and closing control is simple and the power is low enough to move the compressor 10. Not only is it good, but there are fewer failures.

  Furthermore, even when newly installing a selective intake facility in an existing dam, it can be installed on the bottom 4 in front of the dam body 3, so there is no need to make major changes in civil engineering or temporarily stop discharge. Can be done easily and in a short period of time.

  3 and 4 show the air tube type selective water intake equipment 1B of the second embodiment. The difference from the air tube type selective water intake equipment 1A of the first embodiment is that a total of four inner strut members (rod-like bodies) 14 are erected at the same position interval inside the outer strut member 5. .

  In addition, the same number of ring-shaped shelf plates 15 that are slightly larger in diameter than the air tubes 7 are provided in the same number as the air tubes 7, and the inner and outer flange hole portions 15a of the respective shelf plates 15 are inserted into the column members 5 and 14, respectively. It fixes to each support | pillar member 5 and 14 by welding etc. in the position holding the vertical space | interval H of the air tube 7. FIG. In addition, like the air tube type selective water intake equipment 1A of the first embodiment described above, the inner column member 14 can be eliminated and the shelf plate 15 can be fixed only to the outer column member 5 by welding or the like.

  The air tube 7 is supported on the upper surface of the corresponding shelf 15.

  In the case of the air tube type selective water intake equipment 1B of the second embodiment, in addition to the effect of the air tube type selective water intake equipment 1A of the first embodiment, a ring-shaped shelf board 15 is provided on each of the support members 5 and 14. Therefore, the floating force of the air tube 7 is suppressed by the shelf plate 15 so that the vertical distance H can be maintained and the air tube 7 can be supported.

  5 and 6 show an air tube type selective water intake facility 1C of the third embodiment. The difference from the air tube type selective water intake equipment 1B of the second embodiment is that a spacer sleeve 17 having a length set to the height of the vertical distance H is provided at the upper surface position of each flange hole portion 15a of the shelf board 15. The spacer sleeve 17 is fixed and penetrated through the flange hole 15a, and the spacer sleeve 17 is inserted into the support members 5 and 14 so as to be supported so as to be vertically movable.

  And the said air tube 7, the shelf board 15, and the spacer sleeve 17 make the water intake unit U for every step | paragraph, and this unit U is piled up between the water bottom 4 and the water surface L by the upper and lower multistage.

  If it is 1C of the air tube type selective intake equipment 1C of 3rd Embodiment, in addition to the effect of the air tube type selective intake equipment 1A, 1B of 1st, 2 embodiment, the water intake unit U becomes a simple structure. In addition, handling such as installation is further improved.

  In addition, since the water intake unit U can be moved up and down with respect to the support members 5 and 14 by the spacer sleeve 17, as shown in FIG. Then, each intake unit U can be floated sequentially and treated.

  Fig.7 (a) is the air tube type selective intake equipment 1D of 4th Embodiment. The difference from the air tube type selective water intake equipment 1C of the third embodiment is that a curved portion 15b is formed by bending or bending the shelf board 15 inward.

  That is, when the air in the air tube 7 is discharged, the air tube 7 contracts with irregular irregularities on the flat upper surface of the shelf board 15 as indicated by 7 ', and the irregularities are removed by the irregularities, and the intake from the water intake 12 is caused. There is a possibility that the water flow condition is disturbed or a flow force is applied to the air tube 7.

  Therefore, by curving or bending the shelf plate 15 inward, the contracted air tube 7 'is caused by the water pressure of the dam lake 2 taken into the air tube 7 from the water intake 12 as indicated by the arrow a. Since the flat portion is pressed along the curved portion 15b, the disturbance of the intake flow condition is improved, and the possibility that a flow force is applied to the air tube 7 is reduced.

  As shown in FIG. 7B, in addition to the configuration in which the bent portion 15b is formed in the shelf plate 15, a ring-shaped rectifying plate 19 is attached to the upper portion of the air tube 7, and the rectifying plate 19 is inwardly arranged. It is preferable to form the curved portion 19a by bending or bending. That is, the current plate 19 is formed in the same cross-sectional shape as the shelf board 15. In addition, if the shelf board 15 is flat cross-sectional shape, the baffle plate 19 will also be formed in flat cross-sectional shape. The current plate 19 is supported so as to be vertically movable by inserting the flange hole portion 19b through the spacer sleeve 17.

  The shelf plate 15 and the rectifying plate 19 are basically made of a steel plate, but may be made of a net or synthetic resin.

  With this configuration, the air tube 7 ′ contracted via the rectifying plate 19 due to the water pressure of the dam lake 2 taken inward of the air tube 7 from the water intake 12 as indicated by an arrow “a” is formed into each curved portion 19 a, Since it is pressed flat along 15b and covered with the rectifying plate 19, the disturbance of the intake water flow is further improved, and the flow force is not applied to the air tube 7.

  In each of the above embodiments, as the predetermined water level, the seventh-stage air tube 7 is contracted and the water intake 12 is opened to take water, but as illustrated in FIG. The second and seventh stage air tubes 7 can be shrunk, and the water intake 12 can be opened to take water. In addition, an arbitrary air tube 7 can be contracted to open the water intake 12 of any layer of the dam lake 2 and simultaneously take water.

  Thus, it is possible to easily cope with the case where water is taken from a plurality of water depth positions, such as the upper layer and the middle layer, and the middle layer and the lower layer. Of course, all the air tubes 7 can be contracted, and the water intakes 12 of all the layers can be opened to simultaneously take water.

  In each of the above embodiments, the air tube 7 or the intake unit U is stacked in 10 steps on the upper and lower sides. However, as shown in FIG. 9, the block body 20 is replaced with the shelf plate 15 in place of the air tube 7. A supported connecting unit R may be provided, and the connecting unit R may be interposed at a necessary location between the intake unit U. Fig.9 (a) shows the example which has arrange | positioned the water intake unit U and the connection unit R alternately, FIG.9 (b) arrange | positions the water intake unit U in the upper layer, the middle layer, and the lower layer, An example is shown in which a connecting unit R is disposed between them.

  That is, the intake unit U is arranged in the deep water area that requires fine control of the intake position, and the connecting unit R is arranged in the deep water area where the water is hardly taken, thereby reducing cost and simplifying the opening / closing control. Can do.

  Further, if the connecting unit R is configured to have a low levitation force, the levitation force of the air tube 7 can be suppressed.

  The air tube type selective water intake facilities 1A to 1D of each of the above embodiments are independent tower types that are self-supporting with respect to the water bottom 4, but as shown in FIG. A side wall 3a is provided, and selective water intake facilities 1A to 1D are arranged between the side walls 3a. A frame 22 of a bar screen 21 is attached to the side wall 3a, and an outer column member 5 is placed at appropriate positions on both inner surfaces of the side walls 3a. It can also be fixed to the screen 22 with a metal fitting 23.

  Further, as shown in FIG. 11, the selective water intake facilities 1 </ b> A to 1 </ b> D are arranged in front of the dam dam body 3, and the frame 22 of the bar screen 21 is attached to the front surface of the dam dam body 3, so Can be fixed to the screen 22 with a metal fitting 23.

  With such a configuration, the support of the outer support member 5 becomes stronger.

It is an air tube type selection water intake equipment of a 1st embodiment, (a) is a side view, and (b) is a side view at the time of water intake. (A) is a plane sectional view of an outside strut member and an air tube, and (b) is a front sectional view of (a). It is the air tube type selection water intake equipment of 2nd Embodiment, (a) is side sectional drawing, (b) is side sectional drawing at the time of water intake. (A) is a plane sectional view of an outside support member and a shelf board, and (b) is a front sectional view of (a). It is an air tube type selective water intake equipment of a 3rd embodiment, (a) is a plane sectional view of an outside strut member, a spacer sleeve, and a shelf board, and (b) is a front sectional view of (a). It is a disassembled perspective view of a water intake unit. (A) is principal part front sectional drawing of the air tube type selection water intake equipment of 4th Embodiment, (b) is a modification of (a). (A) (b) is side sectional drawing of the usage example of an air tube type selective water intake equipment. (A) (b) is side sectional drawing of the usage example of an air tube type selective water intake equipment. It is the air tube type selective water intake equipment fixed to the dam dam body and a frame, (a) is a top view, (b) is a side sectional view. It is the air tube type selective water intake equipment fixed to the dam dam body and a frame, (a) is a top view, (b) is a side sectional view.

Explanation of symbols

1A to 1D Air tube type selective water intake equipment 3 Dam dam body 4 Water bottom 4a Water intake port 5 Outer support member 7 Air tube 9 Stopper 11 Air supply / discharge pipe 12 Water intake port 14 Inner support member 15 Shelf plate 17 Spacer sleeve 19 Rectification Plate 20 Block body 22 Frame H Vertical distance L Water surface R Connection unit U Water intake unit

Claims (7)

It is fixed to the column member (5) erected on the water bottom (4) , so that the vertical distance (H) is maintained, and the ring shape is stacked in multiple stages between the water bottom (4) and the water surface (L). air tube (7) are provided for, is provided intake inlet (4a) in the sea bed (4) located inwardly of the air tube (7), said air tube (7), the supply of air in water intake during the expansion to adjacent air tube (7) intake (12) close together between, the air tube (7) at the discharge of the air adjacent to the contraction of the predetermined water level air tube (7) Air tube type selective water intake equipment characterized by opening the mouth (12) . To the strut member (5) holds the upper and lower interval of the air tube (7) (H), according to claim 1, wherein the ring-shaped shelf for supporting the respective air tube (7) (15) is provided Air tube type selective water intake equipment. Said shelves (15) spacer sleeve (17) is provided, the spacer sleeve (17), while being vertically movably supported by the strut member (5), its length, the vertical distance (H ) of is set to a height, said air tube (7), shelves (15) and spacer sleeve (17) an air tube according to claim 2, wherein the is configured as a water intake unit (U) per 1-stage Formula selection water intake equipment. The air tube type selective water intake equipment according to claim 2 or 3, wherein the shelf board (15) is curved or bent inward. A ring-shaped rectifying plate (19) is attached to an upper portion of the air tube (7) , and the rectifying plate (19) is formed in the same cross-sectional shape as the shelf plate (15). The air tube type selective water intake equipment according to any one of the above. To the shelf board (15), connecting unit block body in place of the air tube (7) (20) is supported (R) is provided, the coupling unit (R) is the intake unit (U) The air tube type selective water intake equipment according to any one of claims 2 to 5, wherein the air tube type selective water intake equipment is interposed at a necessary place between the two. The air column type selective water intake equipment according to any one of claims 1 to 6, wherein the support member (5) is supported by a dam body (3) .

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