JP3568339B2 - Floating substance intrusion prevention device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention aims to prevent floods in a river basin during heavy rains or the like by using a reservoir (free water) provided above ground or underground through an intake channel, while preventing excess water exceeding the river's flow capacity from invading suspended matters. The present invention relates to an apparatus for preventing intrusion of suspended matter to be introduced into a water reservoir, a water storage tunnel, and the like and referred to as a “reservoir” in the present specification.
[0002]
[Prior art]
Conventionally, in order to prevent floods in the river basin during heavy rains, etc., a reservoir has been set up to temporarily store surplus water exceeding the river's flow capacity, and after the water level of the river has fallen, store the surplus water. The water is drained from the reservoir to the river by pumping up.
However, it is practically impossible to secure a vast land for providing a reservoir near a large city, and therefore, it has been proposed to provide a reservoir underground.
[0003]
[Problems to be solved by the invention]
By the way, the flowing water flowing down the river contains suspended matter such as wood chips and synthetic resin, and especially when heavy rain etc. occurs, a large amount of suspended matter is generated, so if surplus water is directly introduced into the reservoir, There are problems such as clogging of the pump at the time of pump-up, and decay in the reservoir when the suspended matter introduced together with the surplus water, and furthermore, when the reservoir is installed underground, the introduced suspended matter is removed. Therefore, there is a problem that extremely difficult work is required.
[0004]
To deal with this problem, it is necessary to install a screen at the entrance of the intake channel and introduce surplus water from the river into the reservoir while preventing intrusion of suspended matter by this screen. Since a large amount of suspended matter is generated, the screen is clogged by the suspended matter, and there has been a problem that surplus water cannot be smoothly introduced into the reservoir.
In addition, in the case where a dust removing device for removing suspended matter trapped on the screen in order to prevent blockage of the screen is additionally provided, there is a problem that it takes time to process the scraped-up screen residue.
[0005]
The present invention solves the problems of the above-mentioned conventional water storage equipment, and the clogging of the screen by the floating material is small, and the floating material intrusion prevention device that can eliminate or significantly reduce the floating material captured by the screen. The purpose is to provide.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a suspended matter intrusion prevention device of the present invention is directed to a suspended matter intrusion prevention device for introducing surplus water of a river into a reservoir via an intake channel while preventing intrusion of suspended matter. A waterway is formed almost in parallel with the waterway, and between the river and the waterway, an intake channel whose upper surface is covered by a screen is formed, and a water level difference is created between the waterway and the waterway. By generating a water flow from one side to the other side in a direction substantially perpendicular to the flowing direction of the river or the branch water channel, at least a part of the water flow is caused to flow into the water channel.
[0007]
This allows the surplus water of the river to be introduced into the reservoir through the water channel while preventing the intrusion of suspended matter by the screen, and the suspended matter on the screen is directed substantially perpendicular to the flowing direction of the river or the branch waterway. , And at least a portion of it returns to the river via a river or a branch channel, thereby eliminating or significantly reducing suspended matter trapped on the screen.
[0008]
In this case, the screen can be constituted by a bar screen.
[0009]
Thereby, the suspended matter can be smoothly moved on the screen by riding on the water flow substantially perpendicular to the flowing direction of the river or the branch waterway.
[0010]
Further, the inclination angle of the bar screen can be adjusted.
[0011]
This makes it possible to adjust the position at which the water flow in a direction substantially perpendicular to the flowing direction of the river or the branch waterway enters the bar screen, and to move the suspended matter remaining on the screen.
[0012]
Further, the screen can be configured by arranging a number of disk screen units in which a number of disks are fixed to a rotary drive shaft.
[0013]
This allows the suspended matter on the screen to move on the screen in a direction substantially perpendicular to the flowing direction of the river or the branch waterway, while being further forcibly moved toward the river or the branch waterway. In addition, floating substances trapped on the screen can be eliminated.
[0014]
Further, an inflow water amount adjusting member for adjusting the amount of water flowing into the water intake channel can be provided below the screen.
[0015]
This makes it possible to adjust the amount of water flowing on the screen and the amount of water flowing into the intake channel, out of the water flow in a direction substantially perpendicular to the flowing direction of the river or the branch channel, and, if necessary, remove the suspended matter from the river or the river. It can be smoothly moved on the screen by riding on a water flow substantially perpendicular to the flowing direction of the branch waterway.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a suspended matter intrusion prevention device of the present invention will be described with reference to the drawings.
[0017]
FIGS. 1 and 2 show a first embodiment of a suspended matter intrusion prevention device according to the present invention.
This floating substance intrusion prevention device forms a branch channel 2 substantially parallel to the river 1 and forms an intake channel 7 whose upper surface is covered with a screen 9 between the river 1 and the branch channel 2, and the water level of the river 1 Is set to be higher than the water level of the branch waterway 2, thereby generating a water flow from the river 1 side to the branch waterway 2 side in a direction substantially perpendicular to the flowing direction of the river 1, thereby floating the screen 9. At least a part of the water flow is allowed to flow into the water channel 7 while preventing intrusion of objects, and excess water flowing into the water channel 7 is introduced from the water inlet 8 into the reservoir 4 provided underground. .
[0018]
In this case, the branch waterway 2 is formed substantially parallel to the river 1 at a predetermined position of the river 1, for example, at a position suitable for water intake into the reservoir 4, and the inlet 21 is located upstream of the branch waterway 2. And an outlet 22 is formed on the downstream side so as to communicate with the river 1.
At the entrance 21 of the branch waterway 2, a weir 5 for adjusting the amount of bypass water that is opened when the surplus water of the river 1 is introduced into the reservoir 4 is installed.
In addition, a dive weir 6 for setting the water level of the river 1 higher than the water level of the branch channel 2 is installed at a position near the upstream of the outlet 22 of the branch channel 2 of the river 1.
[0019]
The screen 9 covering the upper surface of the intake channel 7 is constituted by a so-called bar screen 91, and the bar screen 91 is provided between the river 1 and the branch channel 2 along a direction of the water flow substantially perpendicular to the flowing direction of the river 1. And the bar screen 91 is arranged so that the inclination angle can be adjusted with the end 91 a of the river 1 of the bar screen 91 as a pivot.
In this case, the width of the bar screen 91 can be arbitrarily set in accordance with the size of the suspended matter that prevents the bar screen 91 from entering the intake channel 7, but is preferably set to about 30 to 50 mm.
Incidentally, the bar screen 91 is formed by arranging a large number of flat members in parallel as shown in FIG. 2B, and is also shown in FIG. 2C so that the bar screen 91 is unlikely to be clogged. In this way, a large number of inverted triangular members can be configured in parallel, or, as shown in FIG. 2D, a large number of members having an upper end portion thicker than other portions can be configured in parallel.
In addition, the upper surface of the partition wall 71 of the intake channel 7 covered by the bar screen 91 is formed as an inclined surface that becomes lower from the river 1 side toward the branch channel 2. The inclination angle a of the upper surface of the partition 71 is desirably set to about 5 to 15 °.
[0020]
Next, the operation of the suspended matter intrusion prevention device will be described.
At the time of introducing the surplus water of the river 1 into the reservoir 4 in order to prevent flooding of the river basin at the time of heavy rain, etc., the bar screen 91 is disposed substantially horizontally as shown by the solid line in FIG. Thus, the surplus water flowing from the river 1 toward the branch waterway 2 having a low water level is introduced into the reservoir 4 through the water intake channel 7 and the water intake port 8 while preventing intrusion of suspended matter by the bar screen 91. I do.
At this time, the suspended matter on the bar screen 91 moves on the bar screen 91 on a water flow in a direction substantially perpendicular to the flowing direction of the river 1, and returns to the river 1 through the branch waterway 2 and partly returns to the river 1. Stay on the bar screen 91.
When the amount of suspended matter staying on the bar screen 91 increases, the bar screen 91 is swung so as to follow the upper surface of the partition wall 71 as shown by a two-dot chain line (91 ′) in FIG. This makes it possible to increase the amount of water flowing on the bar screen 91 out of the water flow in a direction substantially perpendicular to the flowing direction of the river 1, and put the suspended matter retained on the bar screen 91 on the water flow. Is smoothly moved toward the branch waterway 2 and returned to the river 1 via the branch waterway 2.
In addition, by swinging the bar screen 91 and inverting it toward the river 1 as shown by a two-dot chain line (91 ″) in FIG. 2, the suspended matter that has accumulated on the bar screen 91 is returned directly to the river 1. be able to.
[0021]
The swing operation of the bar screen 91 is performed at predetermined time intervals by a timer, or the amount of suspended matter staying on the bar screen 91 is detected by a weight sensor, and is automatically performed based on the detected weight. You can do so.
[0022]
FIG. 3 shows a second embodiment of the suspended matter intrusion prevention device of the present invention.
This floating substance intrusion prevention device is provided with an inflow water amount adjusting member 3 composed of a fixed lid 31 that is disposed at an angle and a movable lid 32 that is swingably disposed at the tip of the fixed lid 31 at the upper part of the water intake channel 7. In other respects, the structure is the same as that of the first embodiment.
In this case, the bar screen 91 can be provided so as to be swingable or fixed substantially horizontally.
[0023]
Next, the operation of the suspended matter intrusion prevention device will be described.
In introducing excess water of the river 1 into the reservoir 4 to prevent flooding of the river basin during heavy rain, etc., the movable lid 32 is opened with the intake channel 7 open as shown by the solid line in FIG. In this way, the excess water flowing from the river 1 toward the branch waterway 2 having a low water level while preventing intrusion of suspended matter by the bar screen 91 is supplied to the intake channel 7 and the intake port 8. Through the reservoir 4.
At this time, the suspended matter on the bar screen 91 moves on the bar screen 91 on a water flow in a direction substantially perpendicular to the flowing direction of the river 1, and returns to the river 1 through the branch waterway 2 and partly returns to the river 1. Stay on the bar screen 91.
When the amount of suspended matter remaining on the bar screen 91 increases, the movable lid 32 is swung to open the water intake channel 7 as shown by a two-dot chain line (32 ') in FIG. It is lifted over the extension of the fixed lid 31 so as to be closed, and is made to extend along the lower surface of the bar screen 91, thereby increasing the amount of water flowing on the bar screen 91 in the water flow in a direction substantially perpendicular to the flowing direction of the river 1. Then, the suspended matter remaining on the bar screen 91 is placed on the water flow, smoothly moved on the screen toward the branch waterway 2, and returned to the river 1 via the branch waterway 2.
[0024]
The swinging operation of the movable lid 32 is performed at predetermined time intervals by a timer, or the amount of suspended matter remaining on the bar screen 91 is detected by a weight sensor, and is automatically performed based on the detected weight. You can do so.
[0025]
4 and 5 show a third embodiment of the device for preventing intrusion of suspended matter according to the present invention.
This floating substance intrusion prevention device forms a branch channel 2 substantially parallel to the river 1 and forms an intake channel 7 whose upper surface is covered with a screen 9 between the river 1 and the branch channel 2, and the water level of the river 1 Is set to be lower than the water level of the branch waterway 2, thereby generating a water flow in a direction substantially perpendicular to the flowing direction of the branch waterway 2 from the branch waterway 2 toward the river 1. At least a portion of the water flow is caused to flow into the water channel 7 while preventing intrusion of suspended matter, and excess water flowing into the water intake channel 7 is introduced from the water inlet 8 to the reservoir 4 provided underground. is there.
[0026]
In this case, the branch waterway 2 is formed substantially parallel to the river 1 at a predetermined position of the river 1, for example, at a position suitable for water intake into the reservoir 4, and the inlet 21 is located upstream of the branch waterway 2. Is formed so as to communicate with the river 1. In this embodiment, the branch waterway 2 is formed as a closed waterway without an outlet.
At the entrance 21 of the branch waterway 2, a weir 5 for adjusting the amount of bypass water that is opened when the surplus water of the river 1 is introduced into the reservoir 4 is installed.
Further, a dive weir 6 for setting the water level of the river 1 lower than the water level of the branch waterway 2 is provided at a position near the downstream of the entrance 21 of the branch waterway 2 of the river 1.
[0027]
The screen 9 that covers the upper surface of the intake channel 7 is constituted by a so-called bar screen 91, and the bar screen 91 is formed along the direction of the water flow substantially perpendicular to the direction of the flowing water of the branch channel 2. The bar screen 91 is arranged so that the inclination angle can be adjusted around the end 91 a of the branch water channel 2 of the bar screen 91 as a pivot.
In this case, the width of the bar screen 91 can be arbitrarily set in accordance with the size of the suspended matter that prevents the bar screen 91 from entering the intake channel 7, but is preferably set to about 30 to 50 mm.
In addition, the upper surface of the partition wall 71 of the intake channel 7 covered by the bar screen 91 is formed as an inclined surface that becomes lower from the river 1 side toward the branch channel 2. The inclination angle a of the upper surface of the partition 71 is desirably set to about 5 to 15 °.
[0028]
The operation of the device for preventing the intrusion of suspended matter according to the first embodiment is the same as that of the device for preventing the intrusion of suspended matter from the first embodiment except for the point that surplus water flows from the branch channel 2 toward the river 1 having a low water level. The operation is basically the same.
[0029]
FIG. 6 shows a fourth embodiment of the suspended matter intrusion prevention device of the present invention.
This floating object intrusion prevention device comprises a number of disks 92a having a required diameter and plate thickness instead of the bar screen 91 of the floating object intrusion prevention device of the first embodiment, and a rotating drive shaft 92b having a mesh width of the screen. The disk screen unit 92 fixed at a certain distance is used, and a large number of screens 9 are arranged side by side so that the disks 92a of the adjacent disk screen units 92 alternately mesh with each other. Are installed so as to be parallel to the flowing direction of the river 1, and other configurations are the same as those of the above-described suspended matter intrusion prevention device of the first embodiment.
[0030]
Next, the operation of the suspended matter intrusion prevention device will be described.
In introducing excess water of the river 1 into the reservoir 4 to prevent flooding in the river basin during heavy rain, etc., the rotary drive shaft 92b of each disk screen unit 92 is rotated clockwise as shown in FIG. Thereby, the surplus water flowing from the river 1 toward the branch waterway 2 having a low water level is introduced into the reservoir 4 via the water intake channel 7 and the water intake port 8 while preventing intrusion of suspended matter by the disk screen unit 92. To do.
At this time, the floating matter on the disk screen unit 92 moves on the disk screen unit 92 while riding on the water flow in a direction substantially perpendicular to the flowing direction of the river 1, and further, the feed of the disk 92a by the rotation of the rotary drive shaft 92b. Under the action, the water is forcibly moved toward the branch waterway 2, and the entire amount thereof returns to the river 1 via the branch waterway 2.
[0031]
In this case, as in the above-described floating object intrusion prevention device of the second embodiment, the fixed lid 31 is disposed in an inclined manner and the movable lid is swingably disposed at the tip of the fixed lid 31, as in the second embodiment. An inflow water amount adjusting member 3 including a lid 32 can be provided.
[0032]
FIG. 7 shows a fifth embodiment of the device for preventing entry of suspended matter according to the present invention.
This device for preventing intrusion of suspended matter, instead of the bar screen 91 of the device for preventing intrusion of suspended matter of the third embodiment, a number of discs 92a having a required diameter and plate thickness are provided on a rotary drive shaft 92b with a mesh width of the screen. The disk screen unit 92 fixed at a certain distance is used, and a large number of screens 9 are arranged side by side so that the disks 92a of the adjacent disk screen units 92 alternately mesh with each other. Is installed so as to be parallel to the flowing direction of the river 1, and the other configuration is the same as that of the suspended matter intrusion prevention device of the third embodiment.
[0033]
The operation of the suspended matter intrusion prevention device of the fourth embodiment is the same as that of the fourth embodiment except for the difference based on the point that surplus water flows from the branch waterway 2 toward the lower river 1. The operation is basically the same.
[0034]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to the suspended matter intrusion prevention apparatus of this invention, surplus water of a river can be introduce | transduced into a reservoir via a waterway, preventing the invasion of suspended matter by a screen.
In addition, the suspended matter on the screen moves on the screen in a water flow in a direction substantially perpendicular to the flowing direction of the river or the branch waterway, and at least a part of the water returns to the river through the river or the branch waterway. Suspended matter trapped in the water can be eliminated or significantly reduced.
Furthermore, since the screen is not blocked, there is no need to provide a dust removing device for removing suspended matter trapped on the screen, and this eliminates the need for troublesome treatment of screen residue, thereby reducing equipment maintenance costs. The cost can be reduced.
[0035]
In addition, by configuring the screen with a bar screen, the suspended matter can be smoothly moved on the screen by riding on a water flow substantially perpendicular to the flowing direction of the river or the branch waterway.
[0036]
In addition, by making the inclination angle of the bar screen adjustable, it is possible to adjust the position at which the water flow in a direction substantially perpendicular to the flowing direction of the river or the branch waterway enters the bar screen, and the suspended matter remaining on the screen can be adjusted. Can be moved.
[0037]
In addition, by arranging a large number of disk screen units in which a large number of disks are fixed to a rotary drive shaft in parallel with the screen, suspended matter on the screen rides on a water flow in a direction substantially perpendicular to a flowing direction of a river or a branch waterway. While moving on the screen, it is further forcibly moved toward a river or a branch waterway, so that suspended matter trapped on the screen can be eliminated.
[0038]
Further, by providing an inflow water amount adjusting member for adjusting the amount of water flowing into the intake channel below the screen, of the water flow in the direction substantially perpendicular to the flowing direction of the river or the branch channel, the amount of water flowing on the screen and the amount of water flowing in the intake channel. The amount of inflowing water can be adjusted, and if necessary, the suspended matter can be smoothly moved on the screen by riding on a water flow in a direction substantially perpendicular to the flowing direction of the river or the branch waterway.
[Brief description of the drawings]
FIG. 1 is a plan view showing a first embodiment of a suspended matter intrusion prevention device according to the present invention.
FIGS. 2A and 2B show a first embodiment of a suspended matter intrusion prevention device of the present invention, wherein FIG. 2A is an overall sectional view, and FIGS. 2B to 2D are sectional views of a bar screen. FIG.
FIG. 3 is a cross-sectional view showing a second embodiment of the device for preventing entry of suspended matter according to the present invention.
FIG. 4 is a plan view showing a third embodiment of the suspended matter intrusion prevention device of the present invention.
FIG. 5 is a sectional view of the same.
FIG. 6 is a sectional view showing a fourth embodiment of a suspended matter intrusion prevention device according to the present invention.
FIG. 7 is a sectional view showing a fifth embodiment of a device for preventing entry of suspended matter according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 River 2 Branch waterway 21 Inlet 22 Outlet 3 Inflow water control member 4 Reservoir 5 Weir 6 Dive weir 7 Intake passage 8 Intake 9 Screen 91 Bar screen 92 Disk screen unit 92a Disk 92b Rotary drive shaft

Claims (5)

A floating substance intrusion prevention device for introducing surplus water from a river (1) into a reservoir (4) through an intake channel (7) while preventing the intrusion of floating substances, and is branched substantially parallel to the river (1). A waterway (2) is formed, and an intake channel (7) whose upper surface is covered by a screen (9) is formed between the river (1) and the branch waterway (2), and the river (1) and the branch waterway (2) are formed. ), A water level difference is provided between the river (1) and the branch channel (2) from one side to the other side in a direction substantially perpendicular to the flowing direction of the river (1) or the branch channel (2). A suspended matter intrusion prevention device characterized in that at least a part of a water flow is caused to flow into a water channel (7) by generating a water flow. The device for preventing the intrusion of suspended matter according to claim 1, wherein the screen (9) is constituted by a bar screen (91). The device for preventing the intrusion of suspended matter according to claim 2, wherein the inclination angle of the bar screen (91) is adjustable. 2. A screen according to claim 1, wherein the screen comprises a plurality of disk screen units in which a number of disks are fixed to a rotary drive shaft. apparatus. 5. The device for preventing the intrusion of suspended matter according to claim 1, wherein an inflow water amount adjusting member (3) for adjusting an amount of water flowing into the intake channel (7) is provided below the screen (9). .

Images