JPH048566B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an operating device for a bag-shaped undulating weir.

(Prior art) So-called bag-like relief weirs have a simple structure, and are made by injecting water or air into a bag-like body made of rubber-coated cloth or the like installed across a river to make it stand up, or by discharging it and making it fall down. , Also, since it does not require painting, these days,
Widely used in place of steel floodgates.

However, conventional products use power to inject high-pressure water or air into the weir body to raise it up.
In the event of a flood, the system used a floating body to detect the water level of the river and lower the weir. Therefore, power is required and the upstream water level cannot be adjusted, causing flooding damage during small floods that do not lead to lodging.In the case of lodging, the water level just before lodging is large, so
This will cause damage to the downstream area, and it will be necessary to constantly adjust the opening of the intake gate when the water is upright, and the water level will be detected inside the embankment, so in addition to the intake gutter pipe, a water conduit pipe will be installed across the embankment. Furthermore, since such an extra levee-crossing structure was installed in close proximity to the intake sluice gate, there was a risk that the levee would collapse.
Furthermore, maintenance is difficult, such as removing sludge from inside the gutter pipes, and since the water level is detected by mechanical methods, there is a risk of malfunctions, and vibrations generated in the weir body by overflowing water. There were problems such as large amounts of water.

In order to rectify these deficiencies, a patent application has already been published in 1982-
A device such as that shown in No. 29719 has been invented.
This device automatically responds to increases and decreases in river flow without any power or human operations.
It is constructed so that it repeatedly lowers and stands up, and while it is standing up, it always maintains a constant water level above the weir, regardless of the flow rate. Although the conventional problems have been solved to some extent by this invention, it has been found that new problems may arise. That is, (1)
Since the mechanism detects the downstream water level and causes the river to collapse, if the downstream river is repaired after the weir is installed and the water level drops, the collapse will be delayed until it reaches the previously planned water level. Water tanks are vulnerable to uneven ground subsidence, corrosion, etc., and are expected to be the first to fail over many years.
If the airtightness of the primary and secondary intake pipes, etc. is destroyed, it may not automatically collapse even in the event of a flood, resulting in a disaster; (3) Incorrect operation of the lodging valve, i.e., the valve may be re-operated during lodging. These include the fact that it may not work properly when opened, and that it takes time to inhale to stand up.

(Object of the Invention) Therefore, the present invention aims to fundamentally improve these new problems and provide a more convenient operating device for a bag-shaped undulation weir.

(Structure of the Invention) The present invention is intended to solve the conventional problems, and includes a bag-shaped weir body 1 provided across a river,
An equipment room 5 that communicates with the upstream river of the weir body 1, a siphon device 6 that communicates the downstream river of the weir body 1 with the equipment room 5, and an air that communicates with the equipment room 5 via the sub-siphon 33. Tank 7 and air tank 7
and a water storage tank 8 that communicates with each other via a falling water pipe 39. The water pipe 9 that communicates with the inside of the weir body 1 opens to the water inlet 6a in the equipment room 5 of the siphon device 6, and connects the top of the sub-siphon 33 with air. The lower part of the tank 7 is communicated with the primary signal pipe 35, and the equipment room 5 is connected to the ventilation tank 1.
1, a control tank 19, a water level adjustment tank 16, and a backflow prevention tank 28. The backflow prevention tank is provided with a ventilation pipe 10 for supplying and exhausting air, is connected to the air tank 7 via an air supply pipe 14, and is arranged at a position higher than the weir height via a water suction pipe 27. The lower end of the water injection pipe 29 connected to the lower part of the backflow prevention tank 28 is connected to the control tank 1.
The upper end of the secondary breaker 17, which is opened in the vicinity of the standing water level in the water level adjustment tank 16 and connected to the upper part of the control tank 19, is opened in the water level adjustment tank 16 at a position slightly higher than the weir height. The lower end of the water conduit 22 connected to the lower part of the water pipe 16 is opened near the standing water level in the equipment room 5, and the inside of the water level adjustment tank 16 is opened downward in a serrated shape near the weir height, and the water level control tank 16 is opened in the vicinity of the weir height. A primary breaker 15 passing through the position communicates with the crest portion of the siphon device 6, and the top of the primary breaker 15 and the top of the backflow prevention tank 28 are communicated through a suction pipe 30, so that the water level below the standing water level of the control tank 19 is Most of the upper part of the control tank 19 except for the partition wall 1 hanging above the control tank 19
9a, one chamber on the secondary breaker 17 side is communicated with the air tank 7 through the primary intake pipe 32 and communicated with the atmosphere through the artificial collapse valve 21, and the chamber on the other side is connected to the secondary signal. The secondary siphon 3 is connected to the pipe 36, the secondary intake pipe 38, and the branch pipe 37.
3, the inside of the water storage tank 8, and the upper part of the secondary breaker 17 are connected to each other. In addition, cylinder bodies 12, 18, 31 having a diameter larger than the respective pipe diameters are attached to the lower ends of the exhaust pipe 13, the secondary breaker 17, the primary intake pipe 32, and the primary signal pipe 35 that come into contact with the air that can be exposed above the water surface. , 34, and cloth-like membranes 12', 18', 31', etc. may be provided on the top of the cylinder.

The detailed structure and operation of the present invention will be further clarified by describing embodiments.

(Example) First, as shown in FIGS. 1 and 2, the weir body 1 is, of course, made of a flexible member that traverses the entire length of the river and is fixed to the river bed with fixing fittings 2. It consists of a bag-shaped outer tube 3 and an inner tube 4 made of a flexible member built into it, and the outer tube 3 is watertight and the inner tube 4 is airtight so that water can enter and air can enter. There is. The inner tube 4 may be omitted and air may be directly sealed in the outer tube 3. As shown in FIG. 3, the river bank is provided with an equipment room 5 that opens into the river upstream of the weir body 1, a siphon device 6 that opens into the river downstream of the weir body 1, an air tank 7, and a water storage tank 8. It is being In addition,
The numbers including decimal places in Figure 3 are based on the river bed as 0.00 and the weir height as 1.00, and the overflow water depth at the time of collapse is 30%, the downstream water depth is 50%, and the downstream water depth at the time of uprighting is 30%.
This is a number indicating the height of each part from the riverbed in 20% of cases. The inside of the outer tube 3 of the weir body 1 is communicated with one side of the water pipe 9, and the other side of the water pipe 9 is opened to the water port 6a on the equipment room 5 side of the siphon device 6. Further, the inner tube 4 is sealed on all sides, and the inside thereof communicates with an aeration tank 11 in the equipment room 5 through a vent pipe 10. One end communicates with the equipment room 5, which is exposed to the atmosphere during the collapse, through an exhaust frame 12 and an exhaust pipe 13, and the other end communicates with the air tank 7 through an air supply pipe 14. The exhaust frame 12 is sealed on the sides, and the exhaust pipe 1
There is a gas permeable membrane 12' on the top surface other than the part connected to the air filter 3. The ventilation membrane 12' is made of cloth, and exhibits sufficient ventilation when both sides are in contact with air, but when one side is in contact with water, the pressure difference between the water and air is reduced due to the surface tension of the water. It has a structure that does not allow ventilation at all. The lower end opening of the exhaust frame 12 is slightly higher than the river bed, and the upper end of the exhaust pipe 13 is slightly lower than the water surface above a predetermined weir. The inner tube 4 has a height sufficient to resist the air pressure within the inner tube 4.

The siphon device 6 has a water inlet 6a lower than the river bed.
It consists of a drainage port 6b that opens on the downstream side of the weir body 1 and is slightly lower than the riverbed, and a partition wall 6c that is slightly lower than the weir height that partitions the two.

The other end of the primary breaker 15 that opens on the top surface of the siphon device 6 has a saw-shaped opening 15a facing downward, which opens into the water level adjustment tank 16 near the water surface in the equipment room 5. , a secondary breaker 17 inserted into that part from the bottom of the water level adjustment tank 16
A small intake hole 15b is provided above the upper end of the air intake hole 15b. This primary breaker 15 communicates with the atmosphere from a secondary breaker 17 in the water level adjustment tank 16 via a ventilation frame 18, a control tank 19, an air guide pipe 20, and an artificial overturning valve 21, and at the same time communicates with the atmosphere from a water guide pipe 22. It communicates with the water inside the equipment room 5. The upper end of the secondary breaker 17 is higher than the upper end of the opening 15a of the primary breaker 15 and slightly lower than the intake hole 15b. The height of the lower end of the ventilation frame 18 is slightly lower than the river water level when the weir body 1 should be erected (hereinafter referred to as the erected water level), and its structure is the same as that of the exhaust frame 12 described above. The lower end of the water conduit 22 is U-shaped and opens into the equipment room 5 slightly lower than the standing water level, and midway along the way, the inner upper surface of the lowest part is slightly lower than the riverbed level. The impermeable weir 23 crosses the entire width of the entrance of the equipment room 5, and its crest is slightly lower than the upper end of the exhaust pipe 13, approximately equal to that of the partition wall 6c of the siphon device 6, and is at the level of the riverbed. A water conduit 23a having a sufficiently smaller cross-sectional area than the water inlet 6a of the siphon device 6 is provided at a position lower than the height including the inner tube diameter.

Further, a U-shaped pipe 24a branches from the secondary breaker 17, and the other end opens into the control tank 19 in a state slightly higher than the water permeable membrane 18' of the ventilation frame 18, etc. The top surface is slightly lower than the standing water level. The height of the branch is higher than the height of the opening plus the height of the water column when the water in the U-shaped portion below the opening is pushed up to the vertical portion by air pressure. Further, a drainage stop pipe 24b branches from the U-shaped pipe 24a, and the other end is opened slightly lower than the standing water level. The aeration tank 11 and the control tank 19 communicate with each other via a hydrophobic pipe 25, a water supply tank 26, a water suction pipe 27, a backflow prevention tank 28, and a water injection pipe 29. Water suction pipe 27
The upper end is determined by the depth of overflow water above the weir when it should be collapsed.
It is at a predetermined height depending on the negative pressure generated within the siphon 6, and its lower end is slightly lower than the lower end of the exhaust frame 12. The upper end of the water tank 26 is connected from the upper end of the water suction pipe 27 to the water level in the equipment room 5 at the start of exhaustion and the exhaust frame 12.
It is lower by the height difference from the bottom edge. The upper end of the water injection pipe 29 is lower than that of the water suction pipe 27, and the lower end is slightly lower than the standing water level. The inside of the backflow prevention tank 28 communicates with the top of the primary breaker 15 through a suction pipe 30, and the opening of the suction pipe 30 inside the backflow prevention tank 28 is slightly lower than the upper end of the water suction pipe 27. An intake frame 31 opens into the control tank 19 in accordance with the upright water level, and the other end of a primary intake pipe 32 connected thereto opens into the air tank 7 at a level slightly higher than the upright water level.

A sub-siphon 33 opens at the bottom of the air tank 7, passes through a position slightly lower than the weir water level on the way, and communicates with a deep position in the equipment room 5 that is always underwater. Further, in the air tank 7, a signal frame 34 having the same structure as the exhaust frame 12 and the like opens slightly higher than the standing water level, and communicates with the upper part of the sub-siphon 33 via a primary signal pipe 35. A secondary signal tube 36 branches from the other end of the secondary siphon 33,
An opening is formed on the right side of the partition wall 19 a in the control tank 19 at approximately the same height as the opening of the U-shaped tube 24 . Also,
A branch pipe 37 branches from approximately the same height in the same section of the control tank 19, leads to the secondary breaker 17, and
A secondary intake pipe 38 branches from a position slightly lower than the ventilation membrane of the ventilation frame 18 and leads to the top of the water tank 8. The lower end of the bulkhead 19a, which isolates the opening in 19 from others, is slightly below the standing water level and traverses the entire width of control tank 19. A falling pipe 39 opens at the bottom of the water tank 8 and communicates with the bottom of the air tank 7 below the standing water level.

As an aid, there is a saucer 40 at the opening of the air pipe 14 in the aeration tank 11, and a shielding plate 41 at the entrance to the equipment room 5. Furthermore, for emergency use, the ventilation pipe 10 has an emergency air release pipe 42 and an emergency air release valve 43, and the air tank 7 has a water replenishment pipe 44. In addition, a water sealing valve 46 is attached to the water passage pipe 9 on the side of the water sealing pipe 45 and the siphon device 6 on the side where the water sealing pipe 45 is attached. On the upstream side of the siphon device 6, there is a weir 50 that traverses the entire width of the equipment room 5 and has a small hole at a position whose crest is slightly higher than the partition plate 6c and slightly lower than the river bed.
There is. Further, the capacity of the water tank 26 and other structures not mentioned above will be explained together with the operation for better understanding.

Next, the operation and function of the device of the present invention will be explained.

Although there is no real water surface inside the weir body 1, a certain water surface is formed when the water is taken out into the atmosphere using a manometer. Hereinafter, this water level will be referred to as the water head inside the weir. The siphon device 6 will also be referred to as the siphon internal water head.

When the primary breaker opening 15a is open to the atmosphere, the internal water head on the upstream side of the siphon device 6 is:
Although the water level of the river upstream of the weir body (hereinafter referred to as the upstream water level) is slightly lower, the weir body 1 is designed so that a predetermined upstream water level can be obtained even with a slightly lower water head.
Perimeter of outer tube 3 and inner tube 4
The amount of air inside is set to be large enough.

Therefore, when a predetermined amount of air is sealed in the inner tube 4 by the action described later,
First, the inner tube 4 swells and a small weir body is formed to dam the river water, and the rising water flows into the outer tube 3 through the water guide hole 23a, the water inlet 6a, and the water pipe 9, and the water flows into the outer tube 3. The water level upstream of the body will rise, but if no measures are taken at that time, the upstream water level will rise above the predetermined level. However, when the water level reaches a predetermined height, a part of the saw-shaped opening 15a at the lower end of the primary breaker 15 is submerged by water entering the water level adjustment tank 16 from the water conduit 22, and the siphon device 6 On the other hand, air is discharged by the water constantly overflowing from the crest of the siphon device 6, which creates negative pressure and reduces the water pressure at the opening of the water pipe 9. The flow of water into the tube 3 and the rise of the weir crest are stopped, and the water level remains at a predetermined level. In this state, if the river flow increases and the upstream water level rises slightly too much, the primary breaker 15
When the saw-shaped opening 15a at the lower end is narrowed, the negative pressure inside the siphon device 6 further increases, the water head at the opening of the water pipe 9 becomes lower, and the water inside the weir body is discharged from the water pipe 9. decreases, and the upstream water level immediately returns to its previous level. In this way, the water level is automatically adjusted to a constant level, but when the overflow depth at the top of the weir increases, the negative pressure inside the siphon device 6 increases, so the water level is automatically adjusted to the water suction pipe 27 through the suction pipe 30. The water surface inside is sucked up, and finally water overflows from the upper end, and water is injected into the control tank 19 via the water injection pipe 29.

As a result, the ventilation frame 18 is submerged and the air supply from the outside to the water level adjustment tank 16 is completely cut off.
Since air continues to be taken in from the intake hole 15b, the water level in the water level adjustment tank 16 rises to the upper end of the intake hole 15b. Subsequently, the water level in the water injection pipe 29 also rises to the opening of the suction pipe 30. Through these series of operations, the negative pressure inside the siphon device 6 increases rapidly, the water inside the weir is discharged, and the upstream water level gradually decreases. When the upstream water level drops slightly below the predetermined weir water level, the flow rate from above the crest of the seepage weir 23 rapidly decreases, and the water level in the equipment room 5 drops rapidly. On the other hand, as the water level in the equipment room 5 decreases,
The water pressure in the aeration tank 11 also decreases. Therefore, the water level in the aeration tank 11 is suddenly pushed up by the air pressure in the inner tube 4, and when it reaches the lower end of the exhaust frame 12, exhaustion begins. At the same time, the ventilation membrane 12' on the upper surface of the exhaust frame 12 comes into contact with air on both the upper and lower surfaces, thereby restoring air permeability. Therefore,
Since the pressure inside the aeration tank 11 is almost atmospheric pressure, backflow occurs in the path from the water conduit pipe 22 to the hydrophobic pipe 25, but at the same time as the backflow starts, the backflow prevention tank 28
The water level in the water suction pipe 27 rises, while the water level in the water suction pipe 27 sucks air in the backflow prevention tank 28 and falls, and in the embodiment, the backflow prevention tank 28 is
1.30 and the water level in the water suction pipe 27 is 0.65, the pressure is balanced and the backflow stops. Therefore, only a portion of the water in the exhaust frame 12 and the exhaust pipe 13 and water in a portion of 0.65 or more of the water suction pipe 27 fall into the aeration tank 11, and the aeration membrane 12' on the top of the exhaust frame 12 is removed. The inside of the inner tube 4 is completely communicated with the atmosphere without being submerged in water, and since the inner tube 4 is pressed by the water pressure on the upstream side of the weir body 1, exhaust is completely carried out, and the weir body 1 is completely opened. to prostrate.

In this way, the ability to automatically collapse due to flooding is most important for disaster prevention. On the other hand, the primary intake pipe 32, secondary intake pipe 38, etc., which cannot be mechanically integrated, are easily damaged due to uneven subsidence due to earthquakes, etc., and furthermore, corrosion-resistant materials are used economically. It is also expected that the airtightness of water storage tank 8, etc., which is difficult to clean, will be impaired. Therefore, even if these parts are damaged, this operating device is designed to ensure that it will collapse in the event of a flood. That is, when the above-mentioned damage occurs, air is sucked into the control tank 19 and normal function is lost when the water level in the equipment room 5 becomes 0.325 or less in the embodiment. This is because the weir body 1 has already completed its lodging.

In addition, we will supplement the function during lodging. The water in the air tank 7 and water tank 8 is transferred to the secondary siphon 33.
This leads to the inside of the equipment room 5, and as the water level inside the equipment room 5 decreases, it tends to flow out. However, the other end of each tube leading to these is submerged, and water is automatically drawn up into that area, so that the pressure is balanced and no leakage is prevented. saucer 4
0 was specifically created for this purpose.

Next, the functions after the lodging is completed, that is, in the lodging state, will be explained. When the river rises in the collapsed state and the river water level reaches 0.60 or more in the embodiment, water first floods into the aeration tank 11 due to the backflow communicating with the water conduit 22. When the river water level is 0.90, the water level in the aeration tank is 0.50, but if the water rises more than that, water will flood from the exhaust pipe 13, the water level in the water suction pipe 27 will rise, and the water level in the backflow prevention tank 28 will fall. The height will be the same. After that, this condition will not change no matter how much the water rises.

In such a collapsed state, the air supply to the siphon device 6 is completely cut off by closing the artificial collapse valve 21 even in times other than floods, so the negative pressure inside the siphon device 6 increases and the above-mentioned condition occurs. Similarly, water is injected from the water injection pipe 29 into the control tank 19, and the weir body 1 is collapsed. In that case, it is clear that even if the water storage tank 8 etc. is damaged, it will collapse, so the explanation will be omitted.

What should be added during this artificial lodging process is a mechanism for raising the water level in the control tank 19 to the opening of the U-shaped tube 24a, and a mechanism for cleaning the inside of the aeration tank 11 and control tank 19 with fresh water. It is. First, I will explain the former. When the artificial lodging valve 21 is closed, the negative pressure inside the siphon 6 instantly increases, and since the water level on the downstream side of the weir body 1 is also low, the exhaust pipe 13
The inside of the control tank 19 is flooded through the water. At this time, U
Although water is already in the U-shaped portion of the tube 24a,
Compared to the height of the water column when the water is expanded vertically,
The height difference between the U-shaped pipe opening and its branching point from the secondary breaker 17 is made large. Therefore,
Before water enters the U-shaped pipe from above, the water in the U-shaped part is pushed out by air pressure, and the air in the control tank 19 is discharged until the opening is submerged, so the water level rises. The ventilation membrane of the ventilation frame 18 is submerged in water, creating a condition where the surface tension of water acts upon standing up. This series of operations is performed in a short time because the water pipe 9 is relatively small.
This is done before the water level on the upstream side of the weir remains almost unchanged from the predetermined water level above the weir. On the other hand, when the downstream water level at the start of lodging is low, that is, when the river water level is clear water, the negative pressure of the siphon device 6 becomes strong, and a siphon is formed in the primary breaker 15. Therefore, a strong water flow is generated in a series of paths from the exhaust pipe 13 and the water conduit pipe 22 to the siphon device 6,
During this time, the deposits in between are washed away. However, since the top of the primary breaker 15 is set high enough,
In the event of a flood, this cleaning action does not take place.

Next, let's talk about the standing function. Even if the aeration tank 11 is filled with water due to water intrusion from the upper end of the exhaust pipe 13, when the river water level drops to the standing water level of 0.20,
The water level in the aeration tank 11 drops to 0.25. Of course, if there is no water ingress from the exhaust pipe 13, the ventilation tank 11
The water level inside the aeration tank 11 does not drop, so the water level inside the aeration tank 11 is between 0.20 and 0.25. At this time, if the artificial lodging valve 21 is open, air is sucked in from the lower end of the intake frame 31 in the control tank 19, and air is sucked into the intake frame 31.
Both the upper and lower surfaces of the ventilation membrane 31' come into contact with air and restore breathability, but the inner surface of the ventilation frame 18 is still filled with water, and the ventilation membrane has not restored its ventilation. On the other hand, since the other end opening of the primary intake pipe 32 has already become a negative pressure, air is sucked into the air tank 7, and a corresponding amount of water is discharged by the secondary siphon 33. The water level inside will drop. In this way, when the water level drops to the lower end of the signal frame 34, air infiltrates into the frame, the ventilation membrane recovers its permeability, and passes through the primary signal pipe 35 to the secondary siphon 33 and the secondary signal pipe 36. The air is substituted with air sequentially from the high position of the siphon device 6, backflow prevention tank 28, water supply tank 26, etc. through the branch pipe 37, etc. Supplied. As a result, the aeration tank 11
The volume of the water supply tank 26 is made large enough so that the water level inside rises to 0.35 and the ventilation membrane of the exhaust frame 12 is submerged. If water floods from the exhaust pipe during lodging, the water level in the aeration tank 11 will be 0.4, but
In any case, the inside of the aeration tank 11 is shielded from the atmosphere by water. In this way, when the water level inside the secondary breaker 17 also falls and reaches 0.325, the ventilation frame 1
8 is restored, the water level on the right side of the control tank 19 rapidly falls, the lower end of the secondary intake pipe 38 is exposed, and air is supplied to the top of the water tank 8.
Therefore, the water in the water tank 8 falls into the air tank 7 through the falling pipe 39, and the water level in the air tank 7 becomes 0.30.
the lower end of the primary intake pipe 32 and the signal frame 3.
4 is submerged in water, air generates pressure and is sent into the inner tube 4 by the air supply pipe 14 via the aeration tank 11 and the aeration pipe 10, and the weir body 1 stands up. In addition, as the water level on the right side of the partition wall of the control tank 19 decreases, the water level on the left side rises slightly, but since the planar area of the left side is sufficiently larger than that of the right side, the ventilation membrane of the ventilation frame 18 Air supply can continue until the end without submerging.

If there is partial damage during the above-mentioned standing up, the mode of standing up will differ depending on the location. If the primary intake pipe 32 is damaged, it will not be possible to maintain the lying state, but when the predetermined standing water level is reached, it will stand up normally. If the secondary intake pipe 38 or the secondary signal pipe 36 is damaged, the siphon action of the siphon device 6 and the secondary siphon 33 is also cut off, so that they do not stand up at all. However, temporarily, by closing the sealing valve 46 and injecting water from the sealing pipe 45 with a pump, the weir body can be erected and the weir body can be continued to be used. Even if there is air leakage from the inner tube 4, it can continue to be used by the same means.

When the artificial lodging valve 21 is closed, the weir body does not stand up and maintains its lodging state, and when it is opened, air begins to be sucked into the air tank 7, but the drain stop pipe 24
When the water level drops to the lower end of b, air is taken in and enters the primary breaker 15, the siphon action is cut off, and the water level does not drop any further, so the vent frame 18 remains full. However, air is not supplied until the intake is complete, preventing accidents due to incomplete air supply. In addition, considering the magnitude of the negative pressure, air enters the backflow prevention tank 18 before air enters the siphon device 6, and the lower end of the drain stop pipe 24b is submerged in water again, so the siphon remains on until the intake is completed. The siphon action within the device 6 is not cut off, and drainage within the equipment chamber continues normally.
Note that even if the artificial lodging valve 21 is opened during a flood, the weir body will not be erected and it is safe because air is not being taken in from the primary intake pipe 32. In addition, artificial lodging valve 2
Even if the valve is erroneously opened in the middle of closing and inclining the device, the device will incline for a while without any trouble and then stand up normally. In addition, during water level adjustment, the siphon device 6
Even if the siphon action is cut off, if the water level on the upstream side of the weir rises, the siphon action is immediately activated by overflow water from the weir 50, so the water level adjustment function is performed almost continuously.

The normal functions have been described above. Immediately after installation, first, water is injected into the aeration tank 11 and then into the air tank 7 from the supplementary water pipe 44, and the weir body automatically stands up. Further, dust is blocked by the shielding plate 41 and the water shielding dam 23, and is prevented from entering the equipment room 5.

(Effects) As described above, if this device is used, water level adjustment,
It is extremely safe and economical because the device can be quickly lowered or raised, and even if a part of the device is damaged, the device can still be lowered. Note that when the lower end of each tube is exposed from the water surface due to the cylindrical body and membrane, air flows rapidly, so that the operation of the entire apparatus can be made agile.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, and FIG.
The figure is a sectional view of the weir body to show the structure of the weir body,
FIG. 3 is a system diagram of the operation for operating the weir body in the present invention. 1...Weir body, 3...Outer tube, 4...Inner tube, 5...Equipment room, 6...Siphon device,
6a...Water port, 6b...Drain port, 6c...Partition plate, 7
...Air tank, 8...Water tank, 9...Water pipe, 10...Vent pipe, 11...Vent tank, 12...Exhaust frame, 13...Exhaust pipe, 14...Air supply pipe, 15...Primary breaker, 15a
...Primary breaker, 15b...Intake hole, 16...Water level adjustment tank, 17...Secondary breaker, 18...Ventilating frame, 19
...Control tank, 20...Air guide pipe, 21...Artificial lodging valve, 2
2...Water pipe, 23...Water shield weir, 23a...Water guide hole, 2
4a...U-shaped pipe, 24b...drainage stop pipe, 25...hydrophobic pipe, 26...water supply tank, 27...water suction pipe, 28...backflow prevention tank, 29...water injection pipe, 30...suction pipe, 31...intake frame, 32... Primary intake pipe, 33...Secondary siphon, 3
4... Signal frame, 35... Primary signal pipe, 36... Secondary signal pipe, 37... Branch pipe, 38... Secondary intake pipe, 39... Falling pipe, 40... Receiver, 41... Shielding plate, 42... Emergency discharge pipe, 43 ...Emergency air discharge pipe, 44...Water supply pipe, 45...
Water sealing pipe, 46...water sealing valve.

Claims (1)

[Claims] 1. A bag-shaped weir body 1 provided across a river;
An equipment room 5 that communicates with the upstream river of the weir body 1, a siphon device 6 that communicates the downstream river of the weir body 1 with the equipment room 5, and an air that communicates with the equipment room 5 via the sub-siphon 33. Tank 7 and air tank 7
and a water storage tank 8 that communicates with each other via a falling water pipe 39. The water pipe 9 that communicates with the inside of the weir body 1 opens to the water inlet 6a in the equipment room 5 of the siphon device 6, and connects the top of the sub-siphon 33 with air. The lower part of the tank 7 is communicated with the primary signal pipe 35, and the equipment room 5 has an aeration tank 11 and a control tank 19.
, a water level adjustment tank 16 , and a backflow prevention tank 28 . The aeration tank 11 has an exhaust pipe 13 that opens at a position lower than the height of the weir, and a ventilation pipe for supplying and exhausting air in the weir body 1 . The trachea 10 is connected to the air pipe 10, and communicates with the air tank 7 via the air supply pipe 14, and communicates with the backflow prevention tank 28 disposed at a position higher than the weir height via the water suction pipe 27. Water injection pipe 29 connected to the bottom of the backflow prevention tank 28
The lower end of the secondary breaker 17 is opened in the control tank 19 near the standing water level, and the upper end of the secondary breaker 17 connected to the upper part of the control tank 19 is opened in the water level adjustment tank 16 at a position slightly higher than the weir height. A water pipe 2 is open and connected to the lower part of the water level adjustment tank 16.
The lower end of 2 is opened near the standing water level in the equipment room 5, and the inside of the water level adjustment tank 16 is opened downward in a serrated shape near the weir height, and is operated by a primary breaker 15 passing at a position higher than the weir height. It communicates with the crest part of the siphon device 6, and communicates the top of the primary breaker 15 with the upper part of the backflow prevention tank 28 through a suction pipe 30, and most of the upper part of the control tank 19 except for the part below the standing water level, Partition wall 1 suspended above the control tank 19
9a, one chamber on the secondary breaker 17 side is communicated with the air chamber 7 through the primary intake pipe 32 and communicated with the atmosphere through the artificial collapse valve 21, and the chamber on the other side is connected to the secondary signal. The secondary siphon 3 is connected to the pipe 36, the secondary intake pipe 38, and the branch pipe 37.
3, the inside of the water tank 8, and the upper part of the secondary breaker 17 are connected to each other. 2. At the lower ends of the exhaust pipe 13, secondary breaker 17, primary intake pipe 32, and primary signal pipe 35 that come into contact with the air that can be exposed above the water surface, cylinder bodies 12, 18, 31, which have a diameter larger than the respective pipe diameters are installed. 34, and cloth-like membranes 12', 18', and 31' are provided on the top of the cylindrical body.