JP4411245B2 - River water intake device and water intake method using the same - Google Patents

Description

  The present invention relates to a river water intake device for collecting agricultural water or the like from a river and an improvement of a water intake method using the same.

  Conventionally, water has been collected from a river by providing a ditch in the river bed and operating a water intake pump embedded in the ditch.

In the conventional water intake device from the river, the earth and sand contained in the river water accumulates in the groove, which changes the river bed and becomes an obstacle to the use of the intake pump. Therefore, it is necessary to remove the sediment in the ditch, but it has been carefully and carefully done without using a machine so as not to damage the intake pump. These operations were carried out by large-scale construction such as water cut-off due to earth retaining so as not to affect the safety and the ecosystem of the school of fish, which required a great deal of labor, cost and time.
On the other hand, the present invention has a simple structure, a sufficient water intake function, less sediment accumulation, easy removal work even when sediment accumulates, and an environmentally friendly river intake device and a water intake method using the same. The purpose is to obtain.

to this end,
In the first aspect of the invention, the deformation control includes the outer cylindrical portion of the thin-walled cylindrical body, the fixed control portion fixed to the lower inner surface of the middle portion of the outer cylindrical portion, and a pair of swingable movable blades. A water balloon portion formed in a sealed body with a base portion, a movable portion, a flexible portion, an expansion / contraction portion, a folding portion and an end surface portion of the flexible impermeable sheet material, and the top surface of the top portion of the outer cylinder portion. A water intake pipe, a water injection pipe and a drain pipe arranged in the water balloon part, and b) an intermediate part of the water balloon part, the base part on the inner peripheral surface of the fixed control part, and the movable part B) Folding parts that are fixed to the lower surfaces of the movable blades, and the telescopic parts are passed between the movable parts, and b) both ends of the water balloon part are extended from the base part, the movable part, and the telescopic part when the water is full. And a river water intake device formed by a flat end face portion that closes the folding portion.
In the invention of claim 2, the intake pipe is provided with a continuous linear slit on the lower side, and the water injection pipe and the drain pipe are provided with through holes at intervals. The river water intake device described in 1. can be used.

In invention of Claim 3, it is the water intake method using the river intake device of Claim 1 or 2, Comprising: The longitudinal direction of the said river intake device is installed orthogonally to the flow direction of river water, Emptying the water balloon part and lowering the movable blade, placing the movable part and the expansion / contraction part at the initial setting position of the lower limit, taking river water from the intake pipe, stopping the water intake in anticipation of sediment accumulation around the expansion / contraction part, Next, water is introduced from the water injection pipe into the water balloon part to be inflated, the movable part, the expansion / contraction part and the movable blade are pushed upward to push the sediment up and the discharged water is discharged from the end of the outer cylinder part. Introducing and discharging the sedimentary earth, then when the inside of the water balloon part is full and the expansion and contraction part reaches the upper limit, and when the discharge of the sedimentary earth and sand is substantially finished, the water in the water balloon part is withdrawn through a drain pipe, The movable part and the expansion / contraction part are installed in the initial setting. It was solved by intake how to restore the position.
In the invention of claim 4, it is preferable to use the water intake method according to claim 3 in which the longitudinal direction of the river intake device is installed in the direction of the river water and the acute angle direction.
According to the invention of claim 5, in the water intake method according to claim 3 or 4, when the water intake is stopped, the inside of the water balloon is kept full and the movable blade and the inner surface of the outer cylinder part are kept in close contact. It can be a water intake method.

  According to the river water intake device and the water intake method using the same of the present invention, the structure of the water intake is simple, the water intake function can be sufficiently secured, sediment accumulation is small, and even if sediment accumulates, the removal work is easy, and the river environment And has a remarkable effect of not affecting the natural ecosystem.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram of a river water intake apparatus according to an example of the present invention.
FIG. 2 is a schematic view in which the river intake apparatus of FIG. 1 is installed on the river bed.
FIG. 3 is a side view of an example of a fixing tool used in the river water intake device of FIG. 1.
FIG. 4 is a schematic cross-sectional view for explaining the operation of the intermediate portion of the river water intake apparatus of FIG.
FIG. 5 is a schematic perspective view for explaining the operation of the end of the river water intake apparatus corresponding to FIG.
Here, in the outer cylinder part 2 which will be described later, the center side is inward and the opposite side is outside, and the outer cylinder part 2 is viewed in the longitudinal axis direction, the water intake pump side is on the right, and the opposite terminal side is on the left Will be described.

First, the configuration of an example of the river intake apparatus 1 according to the present invention will be described with reference to FIG.
The river water intake device 1 has an outer cylinder part 2, a deformation control part 3, a water balloon part 4, a water intake pipe 5, a water injection pipe 6, and a drain pipe 7. A fixing tool 8 and a pipe retainer 9 are used as necessary.
As will be described later, the outer cylinder portion 2 is a thin cylindrical body, and extends between the right bank R and the left bank L of the river bed, and both ends thereof are open. The cross-sectional shape of the outer cylindrical portion 2 is, for example, substantially circular, elliptical, oval, U-shaped, or polygonal, but is most preferably substantially circular in terms of pressure resistance and manufacturing cost. The material of the outer cylinder part 2 can be stainless steel, rust-prevented metal, concrete with reinforcing bars, reinforced plastic, etc., but stainless steel and concrete with reinforcing bars are most frequently used in terms of pressure resistance and manufacturing cost.
A narrow and substantially flat top 2a extending in the longitudinal direction is formed at the upper end of the outer cylindrical portion 2, and the rear river water intake is rearwardly formed by the upper flat portion 2b and the lower projection 2d in the longitudinal axis direction on the top 2a. An inlet is formed, and a front river water intake is formed rearwardly by the upper flat portion 2c and the lower projection 2e. The front and rear river water intakes open in parallel to the longitudinal axis, and the intake is directed rearward. It is possible to reduce the intrusion of earth and sand in running water.
The deformation control unit 3 includes a fixed control unit 3a and a movable blade 3b, all of which are made of plate-like stainless steel, rust-proof metal or reinforced plastic, and the fixed control unit 3a is located below the middle part of the outer cylinder unit 2. As shown in FIGS. 1 and 4, the movable blades 3b are fixed along the inner peripheral surface, and a pair of them are arranged symmetrically with a gap in the middle as shown in FIGS. 1 and 4, and are coupled by an upper edge of the fixed control unit 3a and a hinge (not shown). And swingable around the hinge. The length of the deformation control unit 3 in the longitudinal direction is shorter than the total length in the longitudinal direction in the outer cylinder portion 2, and in the state shown in FIG. A portion V is formed to prepare for folding when the water balloon portion 4 described later is contracted.

The water balloon part 4 is a water-impermeable sheet material having flexibility including a base part 4a, a movable part 4b, a telescopic part 4c, a folding part 4d and an end face part 4e, such as canvas, rubberized cloth, rubber, reinforced plastic, etc. Each part is made into a balloon-like sealed body. In the state shown in FIG. 1A, the water balloon portion 4 is composed of an intermediate portion, a left end portion, and a right end portion, and the intermediate portion is formed by a base portion 4a, a movable portion 4b, and a telescopic portion 4c, and its cross section is shown in FIG. 4 (c), it is placed in the middle in the longitudinal direction of the inner surface of the outer cylinder part 2, and the left end is formed by the fold part 4d and the end face part 4e, and the intermediate part has the structure shown in FIG. 5 (c). The right end portion is connected to the left side, and the right end portion is connected to the right side of the intermediate portion in a symmetric configuration with the left end portion. The full length in the longitudinal direction of the water balloon part 4 is the same as or slightly swollen at both ends of the outer cylinder part 2 when full of water as shown in FIGS. 1, 4 (c) and 5 (c). Has been.
In the intermediate portion, the base portion 4a is fixed along the inner peripheral surface of the fixed control portion 3a, the movable portion 4b is fixed along the lower surfaces of the pair of movable blades 3b, and the telescopic portion 4c is shown in FIGS. And in the state shown in FIGS. 5 (a) and 5 (b), the wave extends between the movable portions 4b facing each other in the cross section, and in the states shown in FIGS. 1 (b), 4 (c) and 5 (c), the movable portion 4b. It is designed to be able to expand and contract in accordance with each operation over a substantially planar shape.
When the left end is full of water as shown in FIG. 5 (c), the foldable part 4d has a shape substantially extending the base part 4a, the movable part 4b, and the expansion / contraction part 4c, and the end face part 4e is planar and has a base part 4a, The outer shape of the movable portion 4b and the expansion / contraction portion 4c is taken, and the end surface of the outer cylinder portion 2 is flush with or slightly exposed.
The other states of the intermediate portion, the left end portion, and the right end portion will be described in detail in the operation description described later.

The intake pipe 5 is disposed over the entire length of the outer cylinder part 2 in the longitudinal axis direction of the lower surface of the central part of the top part 2a of the outer cylinder part 2, and is a metal or hard plastic pipe having a circular, polygonal or other irregular cross section. However, a continuous linear slit 5a is formed on the lower side to prevent sedimentation inside the earth and sand. On the other hand, in this example, although not shown, a water intake pump is connected to the right extension terminal side. ing.
The water injection pipe 6 and the drainage pipe 7 are fixed in the longitudinal direction of the inner surface of the lower bottom over the entire length of the water balloon part 4, and are metal or hard plastic pipes having a generally circular cross-sectional shape, each having a normal upper space and a through hole. 6a and 7a are perforated. On the other hand, for example, in this example, a valve, a water injection pump and a drainage pump are connected to the right terminal side, although not shown. Although it is efficient to arrange the water injection pipe 6 and the drain pipe 7 on the inner bottom surface of the water balloon portion 4 as shown in FIGS. 1 and 4, it is not limited to this.

The fixing tool 8 is used in several places as shown in FIG. 1B and FIG. 4, and includes a bolt 8a, a seat plate 8b, a packing 8c and a nut 8d as shown in FIG. Then, the fixing control part 3a of the deformation control part 3 and the base part 4a of the water balloon part 4 are placed inside the outer cylinder part 2, and the bolt 8a is inserted into a through hole penetrating in the vertical direction, and the outer side of the bolt 8a is outside. The seat plate 8b and the packing 8c are sequentially placed from the cylindrical portion 2, the seat plate 8b and the packing 8c are sequentially placed from the outer cylindrical portion 2, the fixing control portion 3a, and the base portion 4a inside the bolt 8a, and the nuts 8d and 8d are packed 8c. The outer cylinder portion 2, the fixing control portion 3a, and the base portion 4a can be fixed by screwing them to both ends of the bolt 8a protruding inward and outward of 8c. It is preferable that the through hole through which the bolt 8a is inserted and the bolt 8a are filled with a grout or a sealing material to maintain the watertightness.
Instead of the fixing tool 8, the outer cylinder part 2, the fixing control part 3 a, and the base part 4 a may be fixed by rivets, but it is possible to easily deal with overhaul and replacement of each constituent member after aging. It is preferable that it can be removed by bolts and nuts.
The pipe retainer 9 is formed by pressing a water injection pipe 6 and a drain pipe 7 which are made of a metal plate in parallel in the longitudinal direction of the bottom bottom inner surface of the base portion 4a with a cross-sectional hat shape from above, and a fixing tool 8 at the edge portion. The outer cylinder part 2, the fixing control part 3a, and the base part 4a are fixed together. At this time, in addition to the fixing tool 8 described above, a pipe presser 9 may be interposed between the base portion 4a inside the bolt 8a and the seat plate 8b to fix them together.

Next, with reference to FIG. 2, the installation to the river bed of the river water intake apparatus 1 is demonstrated.
In the river bed, the longitudinal direction of the river water intake device 1 is laid across the right revetment R and the left revetment L so as to be orthogonal to the upstream to downstream flow direction X of the river water W, and FIG. ), For example, along the right revetment R, the intake pipe 5 is extended obliquely upward and a water intake pump (not shown) is connected to the terminal side, and the water injection pipe 6 and the drain pipe 7 are connected from the right bottom surface of the outer cylinder portion 2. A valve, a water injection pump and a drainage pump (not shown) are connected obliquely upward and connected to the terminal side, and a sediment discharge water intake E by a weir is provided in contact with the upper right end of the outer cylinder portion 2. On the other hand, for example, a box-shaped sediment deposit pocket P is provided below the left revetment L, and the left end portion of the outer cylindrical portion 2 of the river water intake device 1 communicates with the sediment sediment pocket P and can store the sediment sediment S.
The installation of the river intake device 1 on the river bed is configured to take in the river water from the sediment discharge water intake E and discharge sedimentary sediment. However, a separate pump is provided to actively discharge the sediment discharge water into the river. Water may be fed into the water intake device 1. Further, in order to use the river water pressure more effectively, the longitudinal direction of the river water intake device 1 is not orthogonal to the river water flow direction X, but is set at an acute angle with the river water flow direction X, preferably 45 degrees or more. Is preferred.
Furthermore, a movable weir may be provided to obtain water pressure.

Next, with reference to FIG.4 and FIG.5, the operation | movement of the river water intake apparatus 1 is demonstrated. FIG. 4 has shown the operation | movement of the said intermediate part in each step which the river water intake apparatus 1 changes with a schematic sectional drawing.
(A) At the time of water intake / initial setting First, as shown in FIG. 4A, the water in the water balloon unit 4 is emptied, the movable blade 3b of the deformation control unit 3 is lowered to the lower limit, and the movable unit 4b of the water balloon unit 4 When the intake pump of the intake pipe 5 is operated in this state at the lower limit initial setting position, the river water flowing in from each river water intake is continuously taken through the slit 5a. Sediment S is deposited on 4c. Therefore, the accumulation of sediment S is estimated and the operation of the water intake pump is stopped and the process proceeds to the next step. The intake pump is shut down at regular intervals of time, or by providing a sensor that operates when the amount of sediment deposited exceeds a limit, etc.

(B) When water intake is stopped and sediment removal starts,
Next, as shown in FIG. 4 (b), in order to discharge the accumulated sediment S, the operation of the water injection pump is started and uncontaminated water such as tap water is introduced into the water balloon part 4 through the water injection pipe 6. . The water balloon 4 swells due to an increase in the amount of water inside, and the movable blade 3b is pushed upward from the movable portion 4b and the expansion / contraction portion 4c, and the sediment S mainly accumulated around the expansion / contraction portion 4c between the pair of movable blades 3b is upward. Pushed up.
At this time, cracks and separation occur in the sedimentary sediment S in a solid state, and the sediment S is easily washed away by the introduced water flow.
In a state where the sediment S is placed in a narrow space surrounded by the upper inner surface including the top 2a of the outer cylinder 2 and the movable blade 3b and the expansion / contraction part 4c, the sediment discharge water is discharged from the sediment discharge water intake E to the outer cylinder. The earth and sand S that has been introduced and passed from the right end of the part 2 and accumulated from the right to the left are pushed in the flow Y direction and discharged from the left end of the outer cylinder part 2 to the earth and sand accumulation pocket P.

(C) When Sediment Removal is Completed and Full of Water Next, as shown in FIG. 4 (c), the amount of water in the water balloon portion 4 is further increased and the water expands and the expansion / contraction portion 4c reaches the upper limit, and the accumulated sediment S is substantially discharged. In the finished state, the slit 5a of the water intake pipe 5 is pressed by the expansion / contraction part 4c having a substantially planar shape, and the intrusion of the earth and sand S into the water intake pipe 5 is prevented. Then, the water in the water balloon section 4 is extracted through the drain pipe 7 by operating the drain pump, returning to the (a) water intake / initial setting state, and completing one cycle to prepare for river water intake by the next cycle.
(D) While water intake is not shown, while water intake is stopped, the inside of the water balloon 4 is kept full, the movable blade 3b and the inner surface of the outer cylinder part 2 are kept in close contact, and there is no gap to minimize sediment S accumulation. Limit it. At this time, the slit 5a of the water intake pipe 5 is closed by the expansion / contraction part 4c.
Here, in each step described above, the expansion / contraction part 4c can be expanded / contracted corresponding to each operation position of the river water intake device 1.

Next, with reference to FIG. 5, the operation | movement around the said edge part in each step which the river water intake apparatus 1 changes is demonstrated.
FIG. 5 is a schematic perspective view corresponding to FIG. 4 when the river water intake device 1 is viewed from the left end side, but the outer cylinder portion 2 is indicated by a two-dot chain line to visualize the other internal configuration. For convenience, the description will be made in the order of (c) → (a) → (b).
(C) When the earth and sand removal is completed and the water is full As shown in FIG. 5 (c), when the amount of water in the water balloon part 4 is full, the folding part 4d has a shape in which the base part 4a, the movable part 4b and the expansion / contraction part 4c are extended. The end surface portion 4 e is in a state of being flush with or slightly protruding from the end surface of the outer cylinder portion 2, and most of the space portion V of the outer cylinder portion 2 is almost occupied by the left end portion of the water balloon portion 4.
(A) At the time of water intake / initial setting As shown in FIG. 5 (a), the end face part 4e falls to the lower bottom side of the outer cylinder part 2, and the folding part 4d is almost folded below the fallen end face part 4e. The space part V of the outer cylinder part 2 expands greatly.
(B) At the time of stopping water intake and starting the removal of earth and sand As shown in FIG. 5 (b), the end face part 4e rises 30 to 60 degrees from the lower bottom side of the outer cylinder part 2, and the folded part 4d is folded downward. The space portion V of the outer cylinder portion 2 is reduced.
On the other hand, the operation around the right end of the river intake device 1 is the same except that it is symmetric with respect to the left end, and detailed description of the operation is omitted.

  The river water intake apparatus and the water intake method using the same of the present invention can be suitably used for collecting agricultural water or the like from a river.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic of the river water intake apparatus of an example of this invention, (a) B * B sectional drawing, (b) A * A sectional drawing. It is the schematic which installed the river water intake apparatus of FIG. 1 in the riverbed, (a) D * D cross-sectional top view, (b) CC cross-section front view. It is a side view of an example of the fixing tool used for the river water intake apparatus of FIG. It is a schematic cross-sectional view explaining the operation of the river intake device middle part of Fig. 1, (a) at the time of water intake and initial setting, (b) at the time of water intake stop and start of sediment removal, (c) at the time of completion of sediment removal and when water is full Show. It is a schematic perspective view explaining the operation of the river intake device end corresponding to FIG. 4, (a) at the time of water intake / initial setting, (b) at the time of water intake stop / start of sediment removal, (c) soil removal complete / full water Show each time.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 River intake device 2 Outer cylinder part 2a Top part 2b, 2c Upper flat part 2d, 2e Lower projection part 3 Deformation control part 3a Fixing control part 3b Movable blade 4 Water balloon part 4a Base part 4b Movable part 4c Expansion / contraction part 4d Folding part 4e End face 5 Water intake pipe 5a Slit 6 Water injection pipe 6a, 7a Through hole 7 Drain pipe 8 Fixing tool 9 Pipe retainer E Sediment discharge water intake part P Sediment accumulation pocket S Sediment R, L Revetment V Space X, Y Flow direction W River water

Claims (5)

  An outer cylinder part of a thin-walled cylindrical body, a fixed control part fixed to a lower inner surface of the middle part of the outer cylinder part and a deformation control part having a pair of swingable movable blades, and a water-impermeable material having flexibility A water balloon part formed in a sealed body with a base part, a movable part, an expansion / contraction part, a folding part and an end face part of the sheet material, a water intake pipe disposed on the lower surface of the top part of the outer cylinder part, and in the water balloon part A) a water injection pipe and a drain pipe arranged; a) an intermediate portion of the water balloon portion, the base portion is fixed to an inner peripheral surface of the fixed control portion, and the movable portion is fixed to a lower surface of the movable blade; The telescopic part is passed between the movable parts, and b) both ends of the water balloon part are a foldable part in which the base part, the movable part and the telescopic part are extended when the water is full, and a planar shape that covers the foldable part. A river intake device characterized by being formed with an end face portion.   The water intake pipe according to claim 1, wherein the intake pipe is provided with a continuous linear slit on the lower side, and the water injection pipe and the drain pipe are provided with through holes at intervals. apparatus.   It is a water intake method using the river water intake device according to claim 1 or 2, wherein the longitudinal direction of the river water intake device is installed perpendicular to the flow direction of the river water, the inside of the water balloon portion is emptied, and the movable blade is provided. Lower the movable part and the expansion / contraction part at the initial setting position of the lower limit, take river water from the intake pipe, stop the water intake by observing sediment accumulation around the expansion / contraction part, and then inject water into the water balloon from the injection pipe Introduce into the part and inflate, push up the movable part, the expansion and contraction part and the movable blade upward to push up the sediment, and discharge the drained water from the end of the outer cylinder part to discharge the sediment. Next, when the inside of the water balloon part is full and the expansion / contraction part reaches the upper limit and the discharge of the sediment is substantially finished, the water in the water balloon part is extracted through a drainage pipe, and the movable part and the expansion / contraction part are set to the initial setting. Features to restore to position Water intake how to.   4. The water intake method according to claim 3, wherein a longitudinal direction of the river intake device is installed in an acute angle direction with respect to the flow direction of the river water. 5. The water intake method according to claim 3, wherein the water balloon is fully filled and the movable blade and the inner surface of the outer cylinder portion are kept in close contact when the water intake is stopped.

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