JP2001164540A - Intake device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intake device capable of making an intake follow fluctuation of water level without use of a large float and stably suck water without installation of a wide screen. SOLUTION: In the intake device of which the suction side pipe 3 of an intake pipe 2 is submerged in a water reservoir and the delivery side pipe 4 is led to a tailrace 34 to take in water through the intake pipe 2 from the water reservoir, the suction side pipe 3 is telescopically constituted so as to be vertically expandable, and the uppermost stage pipe 3a is fixed, a vacuum pump 31 which sucks water into the intake pipe 2 to fill it with water is connected to the top 8 of the intake pipe 2 and further, an intake S and a float 9 are attached to the lowermost stage pipe 3b. It is submerged to expand or constract the suction side pipe 3 by means of the buoyancy of the float 9 and the intake S is forced to follow the fluctuation of the water level in the water reservoir.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water intake device for taking water from a river, a reservoir, and the like, such as a dam and a reservoir.

[0002]

2. Description of the Related Art Conventionally, when performing surface water intake from water storage in a dam, a reservoir, or the like, a circular multi-stage water intake device having a float as shown in FIG. 12 is sometimes used. This type of water intake device follows the fluctuation of the water level WL
Is raised and lowered, and a multi-stage cylinder 81 connected to a lower portion thereof as the float 80 is raised and lowered.
８４84 expands and contracts, and the overflow water can be taken from the mouthpiece 85 without power.

In this type of water intake device, since the multi-stage cylinder is constantly immersed in water, it is necessary to increase the rigidity of the multi-stage cylinders 81 to 83 in order to reliably perform the expansion and contraction operation in water. A large float 80 was required to expand and contract the multi-stage cylinders 81 to 83 whose weight was increased by increasing the rigidity.

[0004]

However, as described above, when the scale of the water intake device is increased, there is a problem that the construction cost is increased and the construction period is lengthened. Therefore, there is a demand for a water intake device capable of performing water intake following a water level fluctuation on a small scale.

The present invention has been made in consideration of the above-described problems of the conventional water intake apparatus, and can perform water intake without causing a large float to make the drinking mouth follow the water level fluctuation. Is provided.

[0006]

According to a first aspect of the present invention, a suction pipe of a water intake pipe is immersed in water storage, a discharge pipe is guided to a discharge channel lower than a water storage level, and water is taken from water storage through the water intake pipe. In the water intake device, the suction side pipe is composed of a telescopic type multi-stage pipe that can expand and contract in the vertical direction, the uppermost pipe is fixed at a predetermined height, and the lowermost pipe is a spout And a float, and the suction side pipe is expanded and contracted in accordance with a change in the water level of the water storage due to the buoyancy of the float, so that the mouthpiece is immersed at a predetermined depth position in the water storage.

According to a second aspect of the present invention, there is provided a water intake device including a water filling means for filling the water intake pipe with water.

According to a third aspect of the present invention, there is provided a water intake device in which the water filling means comprises a pipe branched from the top of the water intake pipe, and a vacuum pump for sucking water through the branch pipe.

According to a fourth aspect of the present invention, there is provided a water intake device provided with a float guide mechanism for guiding the lifting of the float while preventing the float from swaying.

According to a fifth aspect of the present invention, there is provided a water intake apparatus provided with a frictional resistance reducing means for reducing frictional resistance when the suction side pipe expands and contracts, at a portion where the pipe sections overlap.

According to a sixth aspect of the present invention, there is provided a water intake device provided with a stopper for preventing the inserted tube portion from falling off when the suction side tube is extended.

According to the first aspect of the present invention, the suction-side pipe has the uppermost pipe fixed at a predetermined height, and the other pipes are suspended from the uppermost pipe sequentially. I have. The float rises and falls according to the fluctuation of the water level, and the lowermost pipe expands and contracts as the float rises and falls. Thereby, the mouthpiece provided at the lowermost stage is held at a predetermined depth position in the water storage.

According to the second aspect of the present invention, when the water filling means is operated in a state where the mouth portion of the suction side pipe is immersed in the water storage, the air reservoir in the water intake pipe is discharged to fill the water storage, and the water storage is filled. The discharge channel and the discharge channel communicate with a difference in water level, and the water on the water storage side is guided to the discharge channel by the siphon effect to perform suction water intake.

When the water level of the stored water fluctuates, the float provided at the bottom rises and descends following the water level, and water is stably taken in from the drinking mouth.

According to the third aspect of the present invention, the inside of the intake pipe is depressurized by the operation of the vacuum pump, and the stored water is sucked into the intake pipe so that the water is filled.

According to the fourth aspect of the present invention, since the float is prevented from swaying by the float guide mechanism, stable water intake can be performed even when a wave is generated on the water surface.

According to the fifth aspect of the present invention, since the frictional resistance reducing means is provided at the portion of the suction side pipe where the pipes overlap, the expansion and contraction operation of the suction side pipe is performed smoothly.

According to the sixth aspect of the present invention, when the inserted tube is extended to the maximum, the stopper works to prevent the inserted tube from falling off.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.

FIG. 1 is a right side view showing the structure of a water intake device 1 of the present invention, and FIG. 2 is a front view thereof.

In both figures, reference numeral 2 denotes an intake pipe, the suction side pipe 3 of which is immersed in stored water, and the discharge side pipe 4 which is guided to a discharge channel outside the bank 5. The front and upper sides of the suction side tube 3 are:
Screens 6a and 6b made of, for example, grating
To prevent the ingress of floating dust.
In the figure, HWL is the upper limit of the depth range in which surface water is taken, and LWL is the lower limit.

Hereinafter, the configuration of each part of the water intake device 1 will be described in detail. The suction side tube 3 has an outer tube portion (uppermost tube portion) 3a arranged vertically and an inner tube portion (lowermost tube portion) 3b inserted into the outer tube portion 3a, and is a telescope. The expression can be expanded and contracted.

The upper end of the outer pipe part 3a is connected to a connecting pipe part (top part of the intake pipe) 8 arranged in the horizontal direction via an elbow 7, and at a part (predetermined height) higher than the storage water level, the embankment body 5 It is fixed to. The connecting pipe section 8 is further connected to the discharge side pipe 4 which is disposed further downward.

A float 9 is attached to the lower end of the inner pipe portion 3b, and the buoyancy acting on the float 9 causes the inner pipe portion 3b to move up and down following the fluctuation of the water level. . In the figure, the ascending limit position of the inner pipe portion 3b is
This is indicated by a two-dot chain line (see FIG. 1).

FIG. 3 is an enlarged view of the structure of the float 9. In the figure, a float 9 formed of an annular box is provided so as to horizontally surround the lower end of the inner pipe portion 3b. The bottom plate 9a of the float 9 is composed of an inner tube portion 3b that spreads like a trumpet.

A disk 10 is provided below the float 9 at a predetermined distance so as to oppose the float 9.
A drinking mouth portion S is formed between the disk 10 and the disk 10. Therefore, the mouthpiece S is immersed in the water at a predetermined depth position. Also,
At the center of the upper surface of the disk 10, a conical rectifying portion 10a is formed in a protruding manner in correspondence with the inner tube portion 3b expanding in a trumpet shape.
Water is taken out from the drinking mouth C smoothly.

The disk 10 is connected to the float bottom plate 9a using bolts 11 planted at equal intervals along the outer peripheral edge. This disk 10 is also adapted to be received by the gantry 12 when the inner tube portion 3b is pulled out of the outer tube portion 3a during maintenance, thereby holding the drawn inner tube portion 3b in a vertical position. Can be.

On both left and right sides of the float 9, guides 13a and 13b, which are long pipes for guiding the float 9 up and down, are provided upright and are provided so as to protrude horizontally from the outer wall of the float 9. Rollers 14a and 14
b engages with the guides 13a and 13b, respectively.

More specifically, as shown in the plan view of FIG. 4, the guide 13a is provided with support members 15 and 1 extending from the bank 5.
6 fixed. On the other hand, the roller 14a
A groove corresponding to the shape of the outer peripheral surface of the pipe is formed so that it can slide along the guide 13a without dropping from the a.

The roller 14a is supported by a bearing 14a ', and the bearing 14a' is fixed to an outer wall of the float 9 via a mounting member 17. Guide 13 above
a, the bearing 14a 'having the roller 14a, and the mounting bracket 17 function as a float guide mechanism C.

A guide 13b disposed on the opposite side of the guide 13a, and a roller 14 engaged with the guide 13b
The float guide mechanism D made of b or the like has the same configuration as the float guide mechanism C described above, and a plan view of FIG. 5 shows the entire float guide mechanism.

FIG. 3 is a view taken along the line BB in FIG.
A pair of partition walls 5a and 5b extend in parallel from each other to form a U-shaped enclosure in the reservoir. The float guide mechanisms C (and D) arranged on the left and right sides of the float 9 are:
Support member 15a (and 15b) extending from the bank 5
And a support member 16a (and 16b) extending from the partition wall 5a (and 5b). Reference numeral 18 denotes a reinforcing member.

FIG. 6 is a view taken in the direction of arrows BB in FIG. 2, and shows a fixing structure of the outer tube portion 3a.

In the same figure, the outer pipe portion 3a
It is fixed to the top 19a of a support member 19 extending in a letter shape.

The support member 19 has a box-shaped cross section, and as shown in FIG.
A ring-shaped stopper 20 is fixed using a bolt / nut 19c. Inner edge 20a of this stopper 20
Protrudes toward the center by a length L from the inner wall of the outer tube portion 3a, and a flange portion 21 formed on the outer wall at the upper end of the inner tube portion 3b is engaged with the protruding portion via a sealing material 22. It has been stopped. The seal member 22 is made of, for example, a synthetic rubber formed in a ring shape, is fixed to the flange portion 21, and has an outer peripheral edge that slides on the inner wall of the outer tube portion 3a.

A plurality of rollers 23 as frictional resistance reducing means are arranged on the flange 21 at equal intervals so as to reduce frictional resistance when the suction side tube 3 expands and contracts.

The frictional resistance reducing means is not limited to the roller 23 as long as the frictional resistance can be reduced when the suction side tube 8 expands and contracts. The frictional resistance reducing means may be a block-shaped pad 24 as shown in FIG. It can also be configured.

Returning to FIG. A vacuum pump 31 as a water filling means is connected to the connecting pipe portion 8 of the water intake pipe 2 via a branch pipe 30 so that the inside of the water intake pipe 2 can be evacuated. Reference numeral 32 denotes a gate valve for communicating or shutting off the inside of the water intake pipe 2 with the atmosphere, and is normally open. Reference numeral 33 denotes a discharge gate provided in the discharge channel 34, which is normally closed.

Next, the operation of the water intake device 1 having the above configuration will be described.

When the sluice valve 32 is closed and the vacuum pump 31 is driven, the air pool in the water intake pipe 2 is exhausted to a negative pressure, and water is sucked up from the spout S. The water sucked in from the mouth part S flows along the straightening part 10a to prevent the occurrence of turbulence, and the straightened water is smoothly taken into the suction side pipe 3.

When the discharge gate 33 is opened after the intake pipe 2 is filled with water, a siphon effect works due to the difference in water level between the stored water and the discharge flow path, and the stored water is discharged to the discharge flow path 34 through the intake pipe 2. In this state, water is continuously withdrawn from the water storage, and the discharge is continued even if the vacuum pump 31 is stopped.

When the stored water level rises at the time of water intake, the float 9 rises by buoyancy, and the spout S follows the water level.
At this time, since the float 9 rises while being guided by the float guide mechanisms C and D, even if a wave occurs on the water surface, the float 9 does not swing, and water can be taken very smoothly. As described above, when the water level fluctuates, the float 9 moves up and down, and the spout S follows the water level.

The float 9 can be moved up and down from the solid line position shown in FIG. 1 to the two-dot chain line position in accordance with the water storage level, and surface water can be taken in this range. When the water level NWL exceeds the upper limit of the surface water intake, the float 9 stops at the rising limit, that is, at the position indicated by the two-dot chain line. However, water intake is possible even when the water level rises to HWL. On the other hand, when the water level exceeds LWL, that is, when the lower limit of the float 9 is lowered, water intake is stopped.

Next, when the discharge is stopped, the discharge gate 3
When the valve 3 is closed and the sluice valve 32 is opened, the water in the water intake pipe 2 is pushed by the atmospheric pressure and drops to the water storage level, air is accumulated in the water intake pipe 3, the water storage and the discharge channel 34 are separated, and the water discharge is stopped. I do.

When the sealing material 22 of the suction side pipe 3 is to be replaced, the stopper 2 is moved from the support member 19 shown in FIG.
When 0 is removed, the inner tube 3b falls off the outer tube 3a, and the inner tube 3b is received on the gantry 12 via the disk 8. Thereby, maintenance such as replacement of the sealing material 22 can be performed.

FIGS. 9 and 10 show another embodiment of the float guide mechanism. In the following description, the same components as those in FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted.

The configuration shown in FIG. 9 is such that rollers are arranged above and below the outer wall of the float 9. The guide 40 is made of C-shaped steel, and upper and lower rollers 41 and 42 slide on the inner wall thereof. Roller 41 of the upper side, as shown in FIG. (A), the rotation axis R ₁ is arranged in the lateral direction, the roller 42 of the lower side, as shown in FIG. (B), arranged rotary shaft R ₂ is in the front-rear direction Have been. Thereby, the deflection in the left-right direction of the float 9 is regulated by the roller 42, and the deflection in the front-rear direction is regulated by the roller 41. According to this configuration, the lifting and lowering operation of the float 9 can be further stabilized as compared with the float guide mechanism shown in FIG.

In the configuration shown in FIG. 10, the guide 43 is made of H-section steel, and the rollers 43 and 45 slide on the ribs 43a and the parallel surfaces 43b and 43b. The rollers 44 have rotating shafts arranged in the front-rear direction, and the rollers 45, 45 have rotating shafts arranged in the left-right direction and roll with the guide 43 sandwiched therebetween. According to this configuration, since the rollers are assembled on the same metal fitting 46, there is an advantage that an installation error hardly occurs.

The present applicant has previously filed an application for a siphon-type water intake apparatus shown in FIG. The water intake device shown in the figure has been proposed to use the siphon effect to perform intake water intake using an inverted U-shaped water intake pipe 90 as in the present application, and it is not necessary to provide a large float. In this configuration, the suction side pipe 91 of the water intake pipe 90 is immersed in the stored water, and the discharge side pipe 92 is disposed in the water tower 93. The suction side pipe 91 is provided with a small float 95 at the mouth 94 at the tip thereof. The suction-side pipe 91 is circularly moved around a flexible joint 96 provided at the upper part of the apparatus so as to follow the water level fluctuation.

A vertical pipe 98 is provided at the top 97 of the water intake pipe 90.
The suction device 99 is connected through the, and the air pool in the water intake pipe 10 is discharged to fill the water storage in the water intake pipe 10.

However, in the siphon-type water intake device described above, since the mouth portion 94 of the water intake pipe moves in an arc, the screen for preventing intrusion of suspended matter must be formed wide over the range in which the arc moves. Not a target. Also,
For example, if a wave is generated and air enters the water intake pipe 90 from the mouth part 94, the water intake becomes unstable. Therefore, the flexible part 100 is also provided on the mouth part 94 and the float 95 is leveled so that the mouth part 94 can take in water stably. I needed to keep my posture.

On the other hand, according to the present invention, it is possible to stably take water with a simple structure without arranging a plurality of flexible joints having a complicated structure, and it is economical because there is no need to provide a wide screen. There are advantages.

In the present invention, the water filling means uses a vacuum pump in the above embodiment, but is not limited to this.
Any type of pump or water guiding means can be used as long as the inside of the intake pipe can be filled with water.

Although the suction side pipe has a two-stage configuration in the above embodiment, it may have a configuration in which two or more stages are expanded or contracted according to the water intake range.

The water intake device of the present invention can be used as a water intake device for dams, rivers, and water supply reservoirs.

[0056]

As is apparent from the above description,
According to the first aspect of the present invention, the uppermost pipe portion of the suction side pipe is fixed at a predetermined height, and the other pipe sections are sequentially suspended from the uppermost pipe section, and the float is set at the water level. Since the lowermost pipe portion is configured to be expanded and contracted by raising and lowering the float according to the fluctuation, the drinking mouth portion can be held at a predetermined depth position in the stored water with a simple configuration, and water can be taken.

According to the second aspect of the present invention, when the water filling means is operated in a state where the mouth portion of the suction side pipe is immersed in the water storage, the air pool in the water intake pipe is discharged to fill the water storage, and the water storage is filled. The discharge channel and the discharge channel communicate with a difference in water level, and the water on the water storage side is guided to the discharge channel by the siphon effect to perform suction water intake. Even if the water level of the stored water fluctuates in this state, the float provided at the bottom rises and descends following the water level, so that water can be stably taken in from the drinking spout.

According to the third aspect of the present invention, the pressure in the intake pipe can be reduced by operating the vacuum pump, and the water can be sucked and filled in the intake pipe.

According to the fourth aspect of the present invention, since the float guide mechanism prevents the float from swaying, it is possible to perform a stable water intake even if a wave is generated on the water surface.

According to the fifth aspect of the present invention, since the frictional resistance reducing means is provided at the portion of the suction side pipe where the pipes overlap, the expansion and contraction operation of the suction side pipe is performed smoothly.

According to the sixth aspect of the present invention, when the inserted tube portion is extended to the maximum, the stopper works to prevent the inserted tube portion from falling off.

[Brief description of the drawings]

FIG. 1 is a right side view of a water intake device according to the present invention.

FIG. 2 is a front view of the water intake device according to the present invention, which has a partial cutout.

FIG. 3 is an enlarged view showing a configuration of a float unit.

FIG. 4 is an enlarged view showing a configuration of a float guide mechanism.

FIG. 5 is a plan view taken along the line AA of FIG. 2;

FIG. 6 is a plan view taken along the line BB of FIG. 2;

FIG. 7 is an explanatory view of a main part showing a first configuration of a frictional resistance reducing unit.

FIG. 8 is a diagram corresponding to FIG. 7, showing a second configuration of the frictional resistance reducing means.

FIG. 9 is a view corresponding to FIG. 4, showing another configuration of the float guide mechanism.

FIG. 10 is a view corresponding to FIG. 4, showing still another configuration of the float guide mechanism.

FIG. 11 is an explanatory view showing another example of a siphon type water intake device.

FIG. 12 is an explanatory diagram showing a configuration of a conventional water intake device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water intake device 2 Water intake pipe 3 Suction side pipe 3a Outer pipe part 3b Inner pipe part 4 Discharge side pipe 5 Embankment body 6a, 6b Screen 8 Communication pipe part 9 Float 10 Disc 20 Stopper 31 Vacuum pump C, D Float guide mechanism S Spout

Claims (6)

[Claims] Claims 1. An inlet pipe of an intake pipe is immersed in water storage,
In a water intake device that guides a discharge side pipe to a discharge flow path lower than the storage water level and draws water from the water storage through the water intake pipe, the suction side pipe is configured by a telescopic type multistage pipe part that can expand and contract in a vertical direction. Along with fixing the uppermost pipe portion at a predetermined height, providing a mouthpiece and a float in the lowermost pipe portion, and expanding and contracting the suction side pipe according to the fluctuation of the water level by the float of the float, A water intake device characterized in that the mouthpiece is immersed at a predetermined depth position in the water storage. 2. The water intake device according to claim 1, further comprising a storage filling means for filling the inside of the intake pipe with water. 3. The water intake device according to claim 2, wherein said water filling means comprises a pipe branched from a top of said water intake pipe, and a vacuum pump for sucking water through said branch pipe. 4. The water intake device according to claim 1, further comprising a float guide mechanism that guides the float up and down while preventing the float from swaying. 5. The water intake apparatus according to claim 1, wherein a frictional resistance reducing unit that reduces frictional resistance when the suction side pipe expands and contracts is provided at a portion where the pipe sections overlap. 6. The water intake device according to claim 1, further comprising a stopper for preventing the inserted tube portion from falling off when the suction side tube is extended.