JPH07233517A - Composite gate for regulating water - Google Patents

Abstract

PURPOSE:To reduce the number of times for opening and shutting operations of a regulating composite gate and to prevent the generation of noised caused by a current. CONSTITUTION:A siphon 9 is formed in a door body 8 of a roller gate 3 together as a unit, a rubber weir 4 having a rubber coated fabric bag body 4a is provided to the lower stream of the gate 3, a water pipe 13 guiding running water of the upper stream of the gate to the inside of the bag body 4a is provided to a river-bed 1c, at the same time, an upper stream inlet of the water pipe 13 is positioned at the approximately backwater height of the rubber weir 4, an inlet 9a of the siphon 9 is placed to the upper part of the upper stream side of the door body 8, and an outlet 9c of the siphon 9 is positioned in the backwater constructed by the rubber weir 4. When the water level of the upper stream is raised by shutting the gate 3, the rubber weir 4 stands up, and when the water level is further raised, the water overflows, and it flows down with great force to maintain the water in a certain level. The running water is stored in the rubber weir 4, and the running water from the gate 3 is discharged in the water to control the generation of hydraulic jump. When the gate 3 is pulled up in the case of a flood, there is no difference between internal and external pressure of the bag body 4a, and the rubber weir 4 falls down.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water control system in which a plurality of gates (weirs) are used in gates installed in rivers, drainage channels, etc., so that the upstream water level is controlled unattended and unpowered. For composite gates for cars.

[0002]

2. Description of the Related Art Conventionally, roller gates or sluice gates that have been installed across waterways such as rivers and drainage channels are designed to raise the height-adjusted door body to store running water and maintain a constant upstream water level. There are many things I did. Therefore, usually
An intake is provided on the upstream bank of the gate.

The surplus running water overflows from the upper end of the door as it is. In the event of a flood, the flow of water is communicated and the door is pulled up, and the water is discharged from below the door. That is, when the increased water is discharged downstream, the increase in the amount of increase in water increases the water level on the upstream water surface, and the increase in the discharge due to overflow is extremely small. The upstream water level will be adjusted by opening and closing (up and down the door).

[0004]

However, in waterworks and industrial water, since the water intake cannot be interrupted even during a flood, the downstream water level should be the upstream water level (hereinafter,
It is called the planned intake level. ) Must be closed until it equals On the other hand, when the height of the door of the gate is large and the scale of the river is small, it takes a long time to rise until the downstream water level becomes equal to the planned water level, and in some cases, the downstream water level becomes equal to the planned water level. May not rise.

Therefore, during flooding, when controlling the gates so that the upstream water level becomes constant, there is a problem that these gates must be opened and closed frequently for a long time. In addition, along with this, when it is close to a house, there is a problem that the sound due to the fall of the water vein becomes noise.

The present invention provides a water control composite gate, which is an unmanned and unpowered gate for controlling the upstream water level to be constant, in which opening and closing operations are reduced and noise due to water flow is prevented. The purpose is to provide.

[0007]

In order to achieve the above object, the present invention provides a door body of a roller gate provided in a waterway with a drinking port at the upper upstream side of the door body, and overcomes the door body. , A siphon with an outlet on the downstream side is integrally provided, a rubber weir having a bag body made of rubberized cloth is provided downstream of the roller gate, and a pipe for introducing running water upstream of the roller gate into the bag body is provided on the riverbed. Along with being arranged along the pipe, the upstream port of the pipe is located substantially at the weir height of the rubber weir, and the outlet of the siphon is located in the water dammed up by the rubber weir. A composite gate was constructed in the waterway.

Further, a siphon breaker having an opening for adjusting the opening of the crest of the siphon and an opening for adjusting the siphon at a position above the siphon's swallow is connected to the upper part of the siphon. Further, the upper edge of the adjustment port of this siphon breaker is formed in a saw shape.

Further, when a siphon and a siphon breaker are used, they are assembled with a width approximately equal to the width of the door body. Further, the bag body is characterized by combining two rubberized cloths.

[0010]

In the composite gate for water control of the above invention, first,
The velocity head of the water flow is only half the depth of the overflow water by simply passing over the door body, so the flow rate is small, but in the case of a siphon, the flow rate is extremely large, which is equal to the water level difference between upstream and downstream.
Further, since the siphon has a wide width, the flow rate can be increased from this aspect as well. Therefore, even if the roller gate is not opened when increasing water, the siphon works to increase the discharge amount.

Further, since it is dammed up by the rubber dam on the downstream side, it is not necessary to dig into the riverbed, and the outlet of the siphon may be located in the dammed water. In addition, it prevents wear due to gravel. In addition, the outlet of the siphon will be located underwater so that it will not suck in air,
The siphon outlet can be made large under these conditions and the flow rate discharged will also increase.

Next, the time of increasing water will be described. Since the siphon breaker and the siphon communicate with each other near the crest, and the upper edge of the siphon breaker's adjustment port is formed in a saw shape, when the upstream water level rises as the water flow increases when the water level increases, the air supply to the siphon increases. It changes continuously by the shape of the adjustment port. For this reason, the amount of discharge due to overflow increases as the upstream water level rises, and the amount of discharge changes smoothly, and the upstream water level is stabilized and kept constant.

Further, since the siphon and the siphon breaker are integrally provided to the same extent as the width of the door body, and the communication points between the siphon and the siphon breaker are widened in the width direction of the waterway. Even if it collides, only a part of it is damaged and the function can be maintained by other parts.

Next, the soundproof function will be described. Noise occurs when a hydraulic jump occurs downstream of the roller gate. In the configuration of the present invention, water upstream of the roller gate is introduced into the bag body of the rubber weir, and the rubber weir is erected by water pressure. Therefore, running water is stored downstream of the roller gate, and the water surface becomes high. Therefore, the downstream water level can be made larger than the corresponding water depth for causing hydraulic jump. Also, since the overflow from the door is eliminated and the surplus water is made to flow down by the siphon, and the exit of the siphon is located in the water, the water flow discharged from the siphon becomes a so-called submerged jet flow, which prevents jumping. It is preventing. Further, the height of the rubber weir is extremely small, and the noise caused by the nap from the rubber weir is very small.

Next, the case of flood will be described. When the flow rate becomes large and the siphon action makes it impossible to keep the water level constant, the door body of the roller gate is pulled up. At this time,
The water level difference between the upstream and downstream of the roller gate disappears, the water pressure difference between the inside and outside of the rubber weir bag disappears, and the rubber weir falls automatically. Since the bag is a double layer, it will stick to the riverbed when there is no water inside it. Therefore, it does not hinder the communication of floods.

[0016]

Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1 and FIG. 2, a composite gate 2 for water control constructed in a river 1 is a combination of a roller gate (hereinafter referred to as a gate) 3 and a rubber weir 4, and the gate 3 is arranged on the upstream side. The rubber weir 4 is arranged on the downstream side. Gate 3 is installed across river 1, and gate 3
An irrigation canal 6 provided with an intake gate 5 for water intake is diverged on the upstream bank. Further, the gate 3 is divided into two, a concrete pier 7 is provided in the center of the river 1 between them, and a door stop 7a provided on the pier 7 and the revetment 1a,
The door body 8 is provided to be movable up and down by 1b.

A layered siphon 9 is provided outside the upper part of the door body 8 of the gate 3 over the entire length, and a swallow 9a at the upstream end of the siphon 9 is located near the upper part of the gate 3 and faces downward. It is open. The crest 9b at the upper end of the siphon 9 is located above the gate 3, and the outlet 9c at the downstream end of the siphon 9 opens into the running water accumulated by the rubber weir 4. In the vertical section of the siphon 9 in the upstream and downstream directions (see FIG. 1), the swallowing port 9a and the outlet
9c is appropriately larger than the crest 9b.
Below the outlet 9c, a flow guide plate 9d fixed to the door 8 is bent along a water vein.

The swallowing port 9a is made sufficiently lower than the designed water level so as not to suck in air and suspended dust. Also,
Due to the height of the rubber weir 4, the upper end of the outlet 9c is always located in the water and the depth of submersion is made small so that the air is not sucked in and the air entrained by the water flow is easily discharged. I am trying. The height of the crest 9b is set so that the upstream water level becomes the planned water level in the case of the minimum flow rate.

The siphon 9 has a vent hole 9e formed at the top.
Is connected to the inside of the siphon breaker 10 which is widely provided on the outer side of the siphon 9 over the entire width of the water channel. Further, in the present embodiment, in order to cope with the waves at the time of a storm in a large river, the adjustment port (drinking port) 10a of the siphon breaker 10 is surrounded by the still water tank 10b fixed to the siphon 9. The bottom of the still water tank 10b is slightly higher than the swallow 9a of the siphon 9, and a plurality of water passages 10c of appropriate size are formed in the width direction of the river 1 on the bottom. A cover is placed on the top of the still water tank 10b to open an air hole 10d.

The upper edge 10e of the adjusting port 10a of the siphon breaker 10 is formed in a saw-like shape, and the adjusting port 10a is positioned at a height where it will be submerged when the upstream water level is the planned water level. Further, the height difference between the saw-tooth peaks and troughs on the upper edge 10e of the adjusting port 10a is made as small as possible, and the pitch is adjusted so that the fluctuation range of the upstream water level due to the flow rate becomes as small as possible.

In the gate 3 shown in FIG. 1, when the gate 3 is pulled up, it is moved out of the water surface at the flood level by moving a range indicated by an arrow, and the gate 3 shown by a chain double-dashed line represents an intermediate position at that time. .

On the other hand, in order to install the rubber weir 4 downstream of the gate 3, a river bed 1c is dug to form a recess 1d. The bag body 4a of the rubber weir 4 is formed by adhering four circumferences of two pieces of rubberized cloth, and the upstream side is fixed to the upstream side of the recessed portion 1d by the fixed hardware 11. Therefore, in the collapsed state, the bag body 4a is housed in the recess 1d so that the surface of the rubber weir 4 is aligned with the river bed 1c. Further, a saw-shaped spoiler 4b is fixed to the downstream side of the bag body 4a.

An embedded groove 1e is provided at a position upstream of the recess 1d in the same direction as the bag 4a, and the surface thereof is covered with a cover plate 12. A water pipe 13 that connects the upstream of the gate 3 and the downstream of the rubber weir 4 is housed in the buried groove 1e. A branch pipe 14 is provided at an appropriate interval above the water pipe 13 housed in the buried groove 1e.
And the downstream end of the water pipe 13 is located on the riverbed 1c
15 are provided. In addition, the upstream end of the water pipe 13 penetrates the inside of the piya 7 and opens into the water at the upstream end, and the upstream end height of the water pipe 13 is always required when the rubber weir 4 has to lie down. The height is set to be submerged (almost the height of the rubber weir 4).

As shown in FIG. 4, an upper branch pipe of the water flow pipe 13
A flexible tube 16 penetrating the cover plate 12 is connected to the
The other one is connected to a mouthpiece 17 fixed by punching a hole in the rubberized cloth of the bag body 4a. Further, as shown in FIG. 2, a protrusion 7b is formed on the peripheral wall of the upstream side of the peer 7, and each of the two plates is brought into contact with the protrusion 7b to join the upstream side of both plates to each other. Configure protector 18 to protect 7,
The upstream side opening of the water passage 13 faces the gap between the peer 7 and the protector 18.

Next, the operation will be described. First, the state in which the gate 3 is closed after the flood has passed will be described. Gate 3
Is closed, the upstream water level rises, running water flows into the bag body 4a by the water pipe 13, and the rubber weir 4 stands up by the water pressure. At this time, water leakage does not occur because the four circumferences of the bag body 4a are bonded.

When the water level further rises, the overflow of the siphon 9 from above the crest 9b starts, and the gate 3 and the rubber weir 4 are started.
The running water is stored between and. After that, the outlet 9c of the siphon 9 is submerged, and overflow from the rubber weir 4 starts.

Since the water flow is cut off by the spoiler 4b at the upper end of the rubber weir 4, air is supplied from the downstream side of the spoiler 4b while the overflow is small, and the vibration of the rubber weir 4 does not occur. In addition, when the overflow amount becomes large, the spoiler 4b is submerged and air cannot be supplied, but the height of the rubber weir 4 is extremely small. Therefore, when the overflow amount is large, it is a projection on the river bed in terms of hydraulics. Since the water level difference between the upstream and downstream of the rubber weir 4 becomes small, vibration does not occur.

Next, the gate 3 will be described. Since the height of the crest 9b of the siphon 9 is determined on the basis of the minimum flow rate, the water level rises to a height slightly lower than the planned water level even at the minimum flow rate. Therefore, normally, the upstream water level rises to around the planned water level, and water flows through the water inlet 10c.
Through the still water tank 10b. The water level in the still water tank 10b is an average water level because the water inlets 10c are evenly formed in the bottom surface in the width direction of the water channel even if waves are pushed toward one side.

Further, since the height of the bottom surface of the still water tank 10b is set slightly above the swallow 9a of the siphon 9,
Not affected by flow velocity. Therefore, when the water level rises, the adjustment port 10a of the siphon breaker 10 is half submerged and the air supply becomes intermittent, while the air in the siphon 9 is entrained in the water flow and discharged, so that the inside of the siphon 9 becomes negative. The pressure increases, and the discharge rate increases. In this way, the upstream water level settles down to a certain height.

If the water level increases due to flooding and the upstream water level rises slightly above the planned water level, a siphon breaker
10 Saw-shaped adjustment openings 10a
Since a is squeezed and the amount of air supplied decreases, the negative pressure in the siphon 9 increases, the internal water surface on the downstream side rises, the flow rate increases, and the upstream water level is maintained at a substantially constant level. However, the upstream water level becomes high when the flow rate is large and becomes low when the flow rate is small, but the still water tank 10b is drilled on the bottom surface to prevent waves from entering the still water tank 10b, and the height of the control port 10a is increased. Is extremely low, the fluctuation of the upstream water level due to the flow rate does not pose any problem in practice.

Further, since the submergence depth of the swallowing port 9a of the siphon 9 is made sufficiently large and the still water tank 10b is provided on the upstream side thereof, it is difficult to suck the suspended dust. In addition, since the cross sections of the swallow 9a and the outlet 9c of the siphon 9 are appropriately enlarged, and the diversion plate 9d is provided at the outlet 9c, the head loss at the inlet and the outlet becomes small, and the water level difference between the upstream and downstream is considerably small. Until then, the capacity of the siphon 9 does not decrease, and therefore the opening / closing operation of the gate 3 can be delayed.

Further, the above-mentioned enlarged drinking mouth 9a is entirely filled with water, the lower part of the outlet 9c is also filled with water, and the portion near the crest 9b which is not filled with water has a larger cross section. Since it does not exist, the siphon phenomenon is formed at a high speed, and thus the siphon action is fast.

However, since the capacity of the siphon 9 is limited and the upstream water level will eventually rise above the planned water level,
After that, it may be necessary to operate the gate 3,
As described above, the device according to the present invention is required in the case where the downstream water level does not easily rise to the planned water level, so that the gate 3 is operated only in the case of a heavy flood. Therefore, in the event of a major flood, gate 3
The operation of is only open, and the opening and closing operations are not repeated as compared with the conventional method, so the operation is simple.

Further, when the gate 3 is fully opened, there is no difference in water level between the upstream and downstream, so that the rubber weir 4 falls down as described above. In this embodiment, the protector is used.
Since 18 is provided, the flow velocity at the downstream end of the protector 18 is high, and the water surface at the downstream end of the protector 18 is low due to Bernoulli's law. Therefore, the water pressure in the bag 4a of the rubber weir 4 is slightly lower than the external pressure. Further, since the bag body 4a is formed by adhering two rubberized cloths together, the bag body 4a itself tries to return to its original shape, so that the rubber weir 4 becomes completely flat and falls down. Further, in the collapsed state, the recess 1d for accommodating the bag body 4a is formed in the river bed 1c so that the surface of the rubber weir 4 coincides with the river bed 1c, so there is no hindrance to the communication of running water during a flood. .

[0035]

As described above, the present invention is a composite gate for water control constructed by combining a roller gate having a siphon and a rubber weir as described above, so that the structure is extremely simple and requires special power. It does not. Also,
If the actions of the siphon and siphon breaker are combined, the upstream water level can be kept constant until the flow rate becomes considerably large, so it is not necessary to open and close the roller gate frequently, and the operability is significantly improved. In addition, there is no overflow from the roller gate, the running water is discharged from the siphon outlet to the downstream water stored by the rubber weir, so jumping does not occur, and the nap from the rubber weir produces a small noise, Noise due to water flow can be prevented.

[Brief description of drawings]

FIG. 1 is a side sectional view of a composite gate for controlling water according to an embodiment of the present invention.

FIG. 2 is a plan view of the composite gate for water control shown in FIG.

FIG. 3 is a front view of the siphon and the siphon breaker shown in FIG. 1 viewed from the upstream side.

FIG. 4 is an enlarged sectional view illustrating details of a riverbed portion of the rubber weir shown in FIG.

[Explanation of symbols]

 1 waterway 1c riverbed 2 compound gate for water control. 3 Roller Gate 4 Rubber Weir 4a Bag 8 Door 9 Siphon 9a Drinking Port 9b Crest 9c Exit 10 Siphon Breaker 10a Control Port 10e Upper Edge 13 Water Pipe

Claims (6)

[Claims] 1. A roller gate door provided in a waterway,
A siphon, which is provided with a swallow on the upper upstream side of the door body and which has an outlet on the downstream side over the door body, is integrally provided.
A rubber weir having a bag body made of rubberized cloth is provided downstream of the roller gate, and a pipe for introducing flowing water upstream of the roller gate is arranged along the riverbed in the bag body, and the upstream port of the pipe is almost A composite gate for water control, which is located at a weir height of a rubber weir, and an outlet of the siphon is located in the water dammed by the rubber weir. 2. The water control system according to claim 1, further comprising a siphon breaker connected to an upper part of the siphon, the siphon breaker having a control port open at a position above the siphon's swallowing port and above the siphon's swallowing port. Compound gate. 3. The composite water control gate according to claim 2, wherein an upper edge of the adjustment port of the siphon breaker is formed in a saw shape. 4. The composite gate for water control according to claim 1, wherein the siphon has a width substantially equal to the width of the door body. 5. The composite gate for water control according to claim 2, wherein the siphon and the siphon breaker have a width substantially equal to the width of the door body. 6. The composite gate for water control according to claim 1, wherein the bag body is a combination of two rubberized cloths.