JP2567343B2 - River surface water intake method with intake strainer and automatic backwash device - Google Patents

Description

Detailed Description of the Invention

[0001]

[Field of Industrial Application] The present invention can be applied to river surface water in various ways.
Water intake strainer and automatic backwashing equipment
Related to the river surface water intake method.

The following are terms used in this specification.
Items are defined as follows in “Ministry of Construction Technical Standards for River Sabo” etc.
It has been done. (A) “Floor stop” means to prevent scouring of the river bed and
Stabilize slopes and maintain river profile or cross section
For this reason, it refers to a work that is installed across a river. (B) "Water hammer" prevents scouring and works from the bottom
A work piece that suppresses lifting pressure.

[0003]

2. Description of the Related Art The present inventors
No. 923240 and No. 923 related to the invention of
No. 241 etc., rivers or rivers with relatively few rubbish
If it can be managed by people, it will be carried out without any problems.
ing.

[0004] The upstream area of the river has relatively few ponds, but people
Chemical by chemical fertilizers and the like in the basin after living many
Also, due to the delay in urban sewerage, domestic wastewater has flowed out
It has been cultivated, causing abnormal development and growth of aquatic plants and algae.
In addition, the abandoned grass on the irrigation canals and river banks is scattered by the wind.
And synthetic resin-based waste such as vinyl chloride and polyethylene
Etc. increase and become a hindrance to water intake and cause trouble for water users.
ing.

[0005] Conventional river surface water intake is a fixed weir for the river.
The river is settled by pouring it up to reduce the flow velocity of the river.
As a flat bar by using the depth of the weir and avoiding sediment.
-Install an intake with a screen, intake gate, gutter,
Pump up water by combining intake wells etc.
I was there. In this case, the processing of pork is human-powered due to the depth of water.
It was easy to remove it and was performed at appropriate time intervals.

[0006] The current river rehabilitation is
Been changed to excavation river, the river by a novel solid Teiseki weir
It is not possible to raise the water level, so the surface water of the river cannot be taken
Since it is shallow, the conventional method of treating soil and sediment is
The current situation is that it is confusing because it cannot be implemented.

[0007]

[Problems to be Solved by the Invention] River surface water intake is
Choose a place with the least amount of rubbish as much as possible
It ’s almost impossible to get a place free of rubbish
Therefore, human power management is unnecessary and labor saving is possible in a place with rubbish
The development of a possible water intake method is an issue.

[0008] However, the inlet under submerged conditions
Even if the intake strainer is formed on the
Debris removal means with must be worn by earth and sand.
It is a constant, and in order to install this kind of equipment
It is legally unacceptable to attack
It is necessary to take measures to prevent soil and sand, remove debris, and prevent air entrapment.
It is a necessary condition, but how to solve these problems
Is being asked.

[0009] The object of the present invention is to carry out the above problems in water.
Water intake that can be solved without the need for mechanical devices with moving parts
River surface water intake method with strainer and automatic backwash device
To provide.

[0010]

[Means for Solving the Problems] To achieve the above purpose
The present invention, the large diameter portion exposed in the water, and under the large diameter portion
The upper and lower ends were closed by connecting the small diameter part buried in the riverbed to the side
A large number of strainer flows around the large diameter part of the hollow two-stage cylinder.
While opening the inlet, inside the vicinity of the upper end of the small diameter part
From the inner peripheral part of the ring-shaped intermediate partition plate provided to the large diameter part
Place the overflow cylinder rising concentrically so that the upper end is higher than the inlet.
The upper end between the overflow cylinder and the large diameter part.
The detour cylinder concentric with the overflow cylinder hanging from the plate
Is lower than the upper end of the strainer inlet, and above
In addition to providing a water supply port on the outer periphery of the small diameter part,
Install a backwash ventilation pipe from the outside to reach the outside of the detour cylinder.
It is a digitized strainer.

[0011] In addition, the intake strainer with the above configuration
Is a river surface water intake method that uses
Formed across a river between revetment foundations built on the shore
On the upstream side of the floor stop, a water hammer is integrated with the floor stop.
It was placed and the water tap was used to retain water for surface water intake.
The water conduit for the
Install the intake strainer above the strainer inlet at the center of the waterway.
Exposing the large diameter part that has it and burying the small diameter part,
Closed intake wells in the river levee with an air communication valve and settling and sand removal
Means for burying the intake well and the intake strainer
By embedding a water pipe that connects to the water outlet, through this water pipe
Pump up the river surface water stored in the intake well
Backwash ventilation of the above intake strainer
The pipe and the air compressor installed in the machine room above the river embankment
Connect with an air pipe that passes under the floor and set the water level at the intake well.
A strainer is installed to detect the water level and the strainer inlet
Detects obstruction due to the flow of water and automatically compresses it to the above air pipe
Send air to generate backflow at the strainer inlet.
Installed an automatic backwashing device that removes the flow of
It is a river surface water intake method.

[0012]

[Function] The present invention is a headrace for water retention formed in a river bed.
In addition, a large number of
By exposing the large diameter part with the trainer inlet, it becomes a water flow
The action of the contained sediment to flow down by being invited by the flow along the circumference
Occurs and overflows into the center of the intake strainer.
Install the flow cylinder at a position higher than the strainer opening, and
Keep a distance between the strainer opening and the overflow cylinder and
A bypass cylinder is installed in the middle of the
The incoming water should be diverted vertically to flow down into the overflow cylinder.
The inflow speed from the strainer inlet is given by and
Slow down and let the sand settle outside the strainer inlet.
Prevents the inflow of sediment by allowing it to flow down along with the river water flow.
And the shallow water depth and strainer openings clogged with pork
As a result of this strainer opening being narrowed
Prevents swirling and swirling and air entrapment.
It also has the function of stopping.

[0013] Also, the strainer at the strainer inlet may be blocked.
By introducing compressed air into the water strainer.
This strainer creates a backflow at the strainer inlet.
Automatically remove the waste that is blocking the inlet
ing.

[0014]

[ First Embodiment] Referring to the drawings of the embodiments, first, a water intake
Figure 1 shows the right half of the intake strainer vertically.
Fig. 2 is a cutaway front view, and Fig. 2 is also the right side of the intake strainer.
Side view with half sectioned, Figure 3 is a plan view of intake strainer
Is shown.

[0015] The intake strainer 1 has a large diameter part 2 on the upper side and a lower part on the lower side.
Side small diameter part 3 is connected by the large diameter part bottom plate 4 part, and the upper and lower ends are closed.
To form a hollow two-stage cylinder,
The trainer inlet 5 is open. 6 is an intermediate partition plate,
Fits on the inner circumference of the small diameter part 3 by adjusting screw 6b so that it can be adjusted vertically.
It is fixed near the upper end of the intermediate partition cylinder 6a
It is located near the diameter bottom plate 4.

[0016] 7 is an overflow cylinder, which is 1/3 of the diameter of the large diameter portion 2.
It has a diameter of ~ 1/4 and is attached to the flange 7a provided at the lower end.
It is attached to the inner peripheral portion of the intermediate partition plate 6 and
Stand up in the center and the upper end is the upper end of the strainer inlet 5.
It is set higher. 8 is a detour cylinder, which is larger than the overflow cylinder 7.
In the middle of the diameter part 2, the upper end closing plate 9 hangs down and the lower end strikes.
Lower than the upper end of the Lena inlet 5 and concentric with the overflow cylinder 7.
It is provided.

[0017] 10 is a water supply port near the lower end of the outer circumference of the small diameter portion 3.
A flange to connect the water pipe to the tip
Have. Reference numeral 11 is a backwash ventilation pipe, and as shown in FIG.
Enter the inside of the small diameter part 3 from the outside of the bottom of the
180 ° of the outer circumference of the detour cylinder 8 in the large diameter portion 1
It opens in the facing position.

[0018] This concludes the description of the structure of the water intake strainer 1.
Next, this water intake strainer 1 Installed in the river
The structure for watering will be described. Figure 4 shows an intake strainer in a river.
No. 1 is installed to show an example of a construction method for taking in surface water from a river.
FIG. 5 is a plan view showing the AA cross section of FIG. 4 in FIG. 5 and the BB cross section in FIG.
FIG. 6 shows the CC cross section in FIG. 7, and the DD cross section in FIG.
Shows each.

[0019] Between the revetment foundations 12, 12 on both sides of the river
Insulation across the river through seawall foundations 12, 12 and joint materials
Then, a floor stopper 13 is provided, and the floor stopper is provided upstream of this floor stopper.
Concrete pouring is performed integrally with the mechanic 13 and water hammer 14
To form a gentle flow gradient on the downstream side of the floor stopper 13.
We have a hoisting machine 15.

[0020] 16 is a headrace, and how to flow into the water hammer 14
3 parallel to each other, the diameter of the large diameter part 2 of the intake strainer 1
With a width about twice that of
The inflow side ends of the three water conduits 16 are integrated and directed upstream.
Once widened to the full river width at an angle of 45 ° on one side to guide the water flow.
Guide to the water channel 16 and the three water channels 16 individually on the outflow side
Reduce the width toward the downstream side at an angle of 45 ° on one side,
The width of the floor stopper 13 is reduced to 1/2, and
Make sure that the water is stopped as much as possible and pass through to the downstream tutor 15.
It is the same.

[0021] Each of the three water conduits 16 has a water intake
Exposing large diameter part 2 with strainer inlet 5 of trainer 1
Then, the small-diameter part 3 is buried, and a closed-type
The intake well 18 is buried so that the bottom is lower than the lower end of the intake strainer 1.
The intake well 18 and the water inlet 10 of the intake strainer 1.
Water intake strainer connected by buried water pipe 19
The surface water flowing into the river 1 is stored in the water well 18. Sending
A sluice valve 20 is provided at the end of the water pipe 19.
In addition, the intake well 18 communicates with the atmosphere to maintain the internal pressure at atmospheric pressure.
Valve 21, sand basin 22, sand discharge submersible pump 23, water level
The sensor 24 is provided.

The river bank 17 has a machine room 25 and a discharge water tank.
26 is provided, and a pumping pump 27 is provided in the machine room 25.
The air compressor 28 and the receiver tank 29 are installed.
Ri, fried water pump 27 lifting pipe 30 water storage in intake well 18
Pumping to I sent to discharge water tank 26 and water to the feed water channel location use via (not shown) purposes by. Air compressor 28
Splashes water through the receiver tank 29 and the electric valve 31
Backwash ventilation pipe 11 of intake strainer 1
Is connected to a ventilation pipe 32 communicating with the. Pumping pump 2
7 may be a submersible pump installed in the intake well 18.
It

[0023] With the above configuration, the intake strainer 1
The diameter part 2 is completely submerged in the headrace channel 16,
Sand accumulation due to running water colliding with part 2
A primary that forms a front and causes sand to flow down the large-diameter portion 2
A sand protection effect occurs. The river surface water flows over the entire circumference of the large diameter part 2.
Entered from the trainer inlet 5 and blocked by the bypass cylinder 8.
Change the flow downwards as shown by the arrow L in FIG.
The overflow cylinder 7 changes the flow upwards
It flows down into the small diameter part 3 beyond the upper end of 7, and from the water supply port 10.
The water flows into the intake well 18 through the water pipe 19.

[0024] At this time, the flow of water in the river surface water is
It is blocked by the inlet 5 and flows down along the outer circumference of the large diameter portion 2.
Water strainer 1
The flow of water that flows into the interior receives a resistance because it detours in the vertical direction.
Lowers the speed of penetration through the strainer inlet 5.
As a result, most of the sand contained in the running water is outside the large diameter part 2.
Intake water is attracted by the rapid flow of running water along the circumference and flows down.
A secondary sand-preventing action that suppresses the inflow to the trainer 1 works. What
Some sand that flows into the bonito is drawn from the water pipe 19 into the intake well 18
Sand is collected in a sand basin 22 and sand is discharged by a sand discharge water pump 23.
Sometimes the intake strainer 1 in the headrace 16 through the pipe 33.
It is discharged to the downstream side and flowed down.

[0025] In addition, along the L arrow in the intake strainer 1,
The bypass flow is the inflow of water when the strainer blocks the strainer inlet 5.
Due to the generation of vortices that occur when the flow speed increases,
The contained bubbles collide with the detour cylinder 8 and float, and the upper end blocking plate
9 gathers underneath, but this air flows along the outer circumference of the large diameter portion 2.
It is attracted to water and discharged from the strainer inlet 5.

[0026] In particular Nagaregomi on the upstream side of the strainer inlet 5
Strike by being pressed and pressed by the pressure of the water flow.
When the Lena inlet 5 is closed, the intake strainer 1
Inflow well decreased and the balance with the pumped water was lost.
The water level inside will decrease. The water level sensor 24
The air compressor 28 is detected and the compressed air is supplied to the ventilation pipe 3
Large diameter of intake strainer 1 from 2 through backwash ventilation pipe 11
Ru is ejected into the part 2. Then, the inflow water in the large diameter portion 2
Flow backward from the strainer inlet 5 to
Due to the backflow, the strain blocking the strainer inlet 5
Removed and washed away with river water, strainer inlet 5
Regenerates and restores water intake.

[0027] Thus, when the water level of intake well 18 is restored, it will be empty.
The gas compressor 28 is stopped. This backwash is all automatically controlled
Done by. This water level sensor 24 is a pump 27
Also controls the operation of the water to prevent idling when the water level drops.
Also serve.

[0028] As a general rule, the water level in the intake well 18 is the river water level.
However, the balance between inflow and pumped water is upset and the water level
If the pressure drops, the air pressure inside the intake well 18 will drop.
At this time, the atmosphere communication valve 21 does not open, and this negative pressure is
It works to promote the water intake of Na 1. Due to rainfall
When the water level rises, the water level in the intake well 18
If the pressure in the water well rises, the atmosphere communication valve 21 will open and
Adjust the atmospheric pressure of.

[0029] In addition, in the example shown in the figure, there are three intake
Although the example of installing the water tank 1 is shown, it can be installed according to the required water intake.
The number of units can be set freely.

[0030]

The present invention is implemented in the form as described above.
The effect is as described below.

[0031] This is the biggest problem of conventional river surface water intake.
Automatic backwash method using compressed air
By adopting, it is possible to
In addition to enabling water intake, artificial management of poultry
It can be solved as unnecessary.

[0032] Inflow water up and down inside the intake strainer
By making a detour to
Prevent the inflow of sand from the strainer inlet and
Floating bubbles contained in incoming water to attract river water flow
It can be discharged from the strainer inlet and removed.
Wear.

No mechanical equipment with moving parts is installed in the river
Therefore, the trouble of failure due to quicksand etc. of machinery is eliminated.
It can be lost.

Extremely simple intake facility and management
Since the cost is almost unnecessary, the water intake cost is low and it is versatile
Water can be provided at low cost.

[Brief description of drawings]

FIG. 1 is a right half showing an embodiment of a water intake strainer of the present invention .
FIG.

FIG. 2 is a side view in which the right half is also vertically cut.

FIG. 3 is a plan view of FIG.

FIG. 4 is a partial view showing an example of the river surface water intake method of the present invention .
It is the top view cut.

5 is a cross-sectional view taken along the line AA of FIG .

6 is an enlarged cross-sectional view taken along the line BB of FIG.

7 is an enlarged cross-sectional view taken along the line CC of FIG.

FIG. 8 is an enlarged cross-sectional view taken along line DD of FIG.

[Explanation of symbols]

1 intake strainer 2 large diameter portion 3 small diameter portion 4 large diameter portion bottom plate 5 strainer inlet during partition plate 6a 6 partition tube 7 overflow cylinder 8 detour the cylinder 9 upper塞板 10 water supply port 11 backwash air pipe 12 revetment foundation 13 Floor stop work 14 Water tapping work 15 Sedimentation work 16 Water conduit 17 River embankment 18 Intake well 19 Water supply pipe 21 Atmosphere communication valve 22 Settling basin 23 Sand discharge pump 24 Water level sensor 25 Machine room 27 Pumping pump 28 Air compressor 29 Receiver Tank 30 Pumping pipe 32 Ventilation pipe 33 Sand removal pipe

Claims (2)

(57) [Claims] 1. A large-diameter portion exposed in water, and a lower side of the large-diameter portion.
The small diameter part buried in the riverbed is connected to the upper and lower ends
A large number of strainers flow into the outer circumference of the large diameter part of the empty two-stage cylinder.
Open the mouth and install inside the vicinity of the upper end of the small diameter part.
From the inner peripheral part of the ring-shaped intermediate partition plate,
Place the overflow cylinder that rises in the heart with the upper end higher than the inlet.
The upper end blocking plate is provided between the overflow cylinder and the large diameter portion.
The spillover cylinder that is concentric with the above-mentioned spillover cylinder
Set it lower than the upper end of the strainer inlet.
A water supply port is provided on the outer circumference of the diameter part, and the outside of the small diameter part
A backwash ventilation pipe that reaches the outside of the bypass cylinder from
Water intake strainer characterized by and. 2. A river using the intake strainer according to claim 1.
It is a river surface water intake method and is constructed on both left and right river banks.
Of floor stoppers formed across the river between the revetment foundations
On the upstream side, a water hammer was placed integrally with the floor stopper,
A water conduit for the purpose of retaining water for water tapping for surface water intake
Is formed at a lower floor than the above water tapping work, and it is placed on the flow center of the headrace.
Install the intake water strainer with a large diameter part that has a strainer inlet.
Exposed and buried the small diameter part, and closed in the river embankment.
Type intake wells are equipped with an air communication valve and means for sedimentation and sand removal.
Installed and connect the intake well to the intake port of the intake strainer
The water pipe is buried, and water is stored in the intake well through the water pipe.
We decided to pump up and use the river surface water.
In addition, the backwash ventilation pipe of the above intake strainer and the above river bank
With an air compressor installed in the machine room of the
At the same time as connecting, a water level sensor is installed in the intake well to detect
Due to the water level, the strainer inlet is blocked by the flow
Is detected and automatically sends compressed air to the air pipe,
Remove backflow caused by backflow at the strainer inlet
A river surface water intake method with an automatic backwashing device .