JPH048567B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a fully automatic control device for a bag weir.

(Prior art) So-called bag-shaped weirs, which are constructed by injecting water or air into a bag-shaped body made of rubber-coated cloth or the like installed across a river to make it stand up, or drain it and collapse it, have a simple structure. Since it does not require painting, it has recently been widely used in place of steel flood gates.

A device using this bag-shaped weir automatically repeats lodging and raising in response to increases and decreases in river flow, without any power or human operations, and during erection, regardless of the flow rate. The water level above the weir is always maintained at a constant level.

This operating device has already been put into practical use, has undergone repeated improvements, and has been filed under patent application No. 59-27569.
Although the conventional problems have been solved to some extent by this invention, it has been found that new problems may arise.

In other words, (1) the upper end of the exhaust pipe is submerged in water when standing up; therefore, if exhaust is started before the exhaust pipe is exposed to the air, water may enter the exhaust system, resulting in an incomplete There is a risk that the weir may not be fully collapsed due to excessive exhaust.

(2) Since no safety device was added to the invention, the equipment cost was high because the structure was such that even if a part that is prone to failure were to be damaged, it could simply be collapsed.

These are the problems.

(Object of the invention) Therefore, this invention solves these new problems by exposing the exhaust pipe to the air, adding a separate safety device and eliminating excessive equipment. The present invention provides a fully automatic control device for a bag-shaped weir that is extremely safe and simple.

(Structure of the invention) The present invention is intended to solve the conventional problems,
A bag-shaped weir body 1 provided across a river, a control device room 5 that communicates with the upstream river of the weir body 1, and a water inlet 9a provided on the side of the control device room 5 that communicates with the downstream river. A siphon 10 is provided, the other end of the water pipe 7 that opens into the weir body 1 is located at the opening 10a of the siphon 10, and a ventilation pipe 8 for supplying and exhausting air is provided in the weir body 1. The vent pipe 8 is connected to the air tank 30 of the air supply device 6 via the backflow prevention tank 13 and the air pipe 39, and the falling pipe 38 opens at the bottom of the water tank 31 above the air tank 30. One end opens at the bottom of the air tank 30, one end of the subsiphon 35 opens slightly above the standing water level of the air tank 30, the middle part is piped to a position slightly lower than the dam raising water level, and the other end is connected to the control equipment room. 5
The other end of the exhaust pipe 16 opens at a position slightly higher than the dam-up water level in the backflow prevention tank 13 and opens at the upper part of the exhaust tank 11. The other end of the water supply pipe 40, which communicates with the atmosphere through
It opens at a position slightly higher than the internal weir raising water level,
The water pipe 29 that opens at the bottom of the backwater flow prevention tank 14 extends downward and is reversed at a position below the river bed.
The other end of the U-shaped pipe 24 opens at the same height as the upper end of the water supply pipe 40 in the water tank 15, and the lower end of the U-shaped pipe 24, which has one end opened near the upper end of the water tank 15, is located at a height below the riverbed. Invert,
The other end opens at a position slightly higher than the standing water level in the control tank 12, and the inside of the control tank 12 is communicated with the atmosphere through an air guide pipe 20 equipped with an artificial collapse valve 21.
A water injection pipe 25 that opens at a position below the standing water level in the control tank 12 extends upward and has a height approximately equal to the top of a breaker 26 (described later). A breaker 26 is inverted and extends downward, opens downward near the bottom of the right compartment in the water tank 15, and opens at the top of the siphon 10.
extends upward, inverts at a height position forming a siphon only when the control tank 15 is toppled, extends downward, opens in a saw-like shape at the height of the weir raising water level in the right section of the control tank 15, and A water conduit 27 that opens at the bottom of the right side extends downward, inverts at a height below the river bed and extends upward, and opens into the water in the control equipment room 5 at a height slightly lower than the standing water level. The water pipe 25 and the top of the breaker 26 are connected by a small water suction pipe 28, and the lower end of the air supply pipe 23 opens at a height slightly lower than the standing water level in the control tank 12, and the upper end thereof is connected to the water supply tank 1.
The air supply pipe 2 opens near the top of the left compartment of the air supply pipe 2.
One end of the open pipe 37 inserted into the control tank 12 is located at the lower end of the air supply pipe 23, the other end is opened at the top of the water tank 31, and one end is opened at the height of the standing water level in the control tank 12. , an air supply pipe 33 with the other end opened at a position slightly higher than the standing water level in the air tank 30 is disposed, the tops of the breaker 26 and the sub-siphon 35 are communicated with each other by a signal pipe 36, and a safety device 41 is connected emergency siphon 4 with
One end of 1a opens near the bottom of the exhaust tank 11 and extends upward, turns around at a position slightly higher than the dam raising water level and extends downward, turns around again and opens the other end diagonally upward into the river. , a starting pipe 41d connected to the upper end of the emergency siphon 41a opens into the air at a position slightly higher than the dam raising water level, and a position midway between the air discharge pipe 19 and the emergency siphon 41a is communicated with the air supply pipe 41c. It is characterized by

With these configurations, air or water can be automatically supplied and discharged into the weir body depending on the river water level relative to the weir and the river water level entering the control equipment room, thereby preventing the weir body from collapsing. Alternatively, the weir can be erected and the weir can be reliably vented to the atmosphere and the weir can be lowered even in the event of abnormal operation of the device by means of a safety device installed in the control equipment room.

Furthermore, by adding auxiliary members to prevent dirt from entering the device and providing a valve that can artificially lower the weir, safety in the operation of the device can be ensured.

(Example) Hereinafter, the present invention will be explained based on the drawings.

As shown in Figs. 1 and 2, the weir body 1 crosses the entire length of the river, and has a fixing fitting 2.
It consists of a bag-shaped outer tube 3 made of a flexible member fixed to the riverbed, and an inner tube 4 made of a flexible member built into it.Water enters the outer tube 3, and air enters the inner tube 4. They are watertight and airtight respectively. Here, inner tube 4 is omitted and directly,
Air may be sealed inside the outer tube 3.

The inside of the outer tube 3 of the weir body 1 is a water pipe 7
The inner tube 4 is sealed on all sides, and the inside thereof is communicated with a ventilation pipe 8.

On the other hand, as shown in Figure 3, there is a weir 1 on the river bank.
It has a control device room 5 that opens to the upstream and downstream rivers, and an air supply device 6 that communicates with the control device room 5.

In addition, numbers including decimal places in Figure 3 refer to the river bed.
0.00, the weir height is 1.00, 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 20%.It is a number that indicates the height of each part from the riverbed. be.

The control equipment room 5 opens into the river upstream of the weir and forms a flow channel that reaches the river downstream of the weir, with a seepage plate 9 near the downstream end, a water inlet 9a near the river bed, and a water barrier at the height of the weir top. An emergency water inlet 9b is provided at the position, and an emergency water inlet 9a is provided at the
Flowing water is communicated with the opening of the water pipe 7 and the opening 10a of the siphon 10 at the river bed position. The other end of the water pipe 7 communicates with the outer tube 3.

The siphon 10 has an opening 10a lower than the riverbed,
It consists of a drainage port 10b that is slightly lower than the riverbed and opens on the downstream side of the weir body 1, and a crest 10c that is slightly lower than the weir height that partitions the two.

Inside the control equipment room 5, there is an exhaust tank 1 at a height near the river bed.
1 and a control tank 12, and a backflow prevention tank 13, a backflow prevention tank 14, and a water supply tank 15 near the weir height.
These are all sealed on all sides, and in particular, the lower part of the water tank 15 is divided into right and left by a partition plate 15a.

Further, at the other end of the ventilation pipe 8 that opens inside the inner tube 4, an exhaust pipe 1 opens at the top surface of the backflow prevention tank 13 and opens slightly lower than the top surface.
The other end of the exhaust tank 6 opens near the top surface of the exhaust tank 11. Furthermore, an air release frame 18 is built into the exhaust tank 11 and is sealed on the sides and has a ventilation membrane 17 on the top surface, and an air release pipe 19 is connected to the remaining top surface, with the other end opening high into the air. . When the ventilation membrane 17 is made of cloth and is in contact with air on both sides, it exhibits sufficient ventilation, or when one side is in contact with water, it resists the pressure difference between water and air due to the surface tension of the water. It has a structure that does not allow ventilation at all. The upper opening of the air release frame 18 is set high within the limit that satisfies this function.

An air guide pipe 20 opens at the top surface of the control tank 12, and its interior communicates with the atmosphere via an artificial overturning valve 21. In addition, an air supply frame 22 is provided with a lower end slightly lower than the river water level when the weir body 1 in the control tank 12 should be raised (hereinafter referred to as the standing water level), and an air supply pipe 23 connected to the top surface of the air supply frame 22 is provided. The other end opens into the upper part of the water tank 15 . The structure of the air supply frame 22 is the same as that of the air release frame 18.

Inside the control tank 12, a U-shaped pipe 24 is slightly higher than the ventilation membrane 17 of the air supply frame 22 and opens upward.
Air supply pipe 2 via a sufficiently low position to be described later.
It opens at the upper part of the water tank 15 slightly higher than the upper end of the tank 3. The height of the inner upper surface of the bottommost part of the U-shaped pipe 24 is slightly lower than the lower opening of the water injection pipe 25, which communicates one end with the control tank 12.

The water tank 15 is divided into right and left sides by the partition plate 15a. The other end of the breaker 26, which opens on the top surface of the siphon 10, has a saw-shaped opening 26a facing downward, which opens at the level of the water surface above the weir in the right section of the water tank 15.

In addition, the breaker 26 in the water supply tank 15 has an air supply pipe 2
Intake port 2 with an extremely small diameter hole slightly higher than the upper end of 3
6b is provided. A water conduit 27 with an extremely small diameter compared to the breaker 26 opens at the bottom of the same compartment as the breaker 26 in the water supply tank 15, and on the way, it reverses from a position slightly lower than the riverbed and rises slightly lower than the standing water level. It's open.

An extremely small-diameter water suction pipe 28 branches from near the upper left end of the breaker 26 , and the other end of the water suction pipe 28 is connected to the top of a water injection pipe 25 that opens slightly lower than the lower opening of the water guide pipe 27 .

On the other hand, in the left section of the water supply tank 15, an air supply pipe 23,
The respective openings of the U-shaped pipe 24 and the water pipe 29 are provided at a position much higher than the weir height. The opening position of the U-shaped pipe 24 is slightly higher than the opening of the air supply pipe 23.

The water pipe 29 has an opening at a height near the water surface above the weir in the water supply tank, extends downward, inverts at a position slightly lower than the river bed, and further extends upward to form the backwater flow prevention tank 1.
It communicates with the bottom of 4.

A water supply pipe 40 having an opening at a position higher than the bottom opening of the water supply pipe 29 communicates with the backwater flow prevention tank 14, and the other end thereof communicates with a sufficiently lower position of the air discharge pipe 19.

The air supply device 6 mainly includes an air tank 30 and a water storage tank 31 above the air tank 30, both of which are sealed on all sides.

Further, inside the control tank 12, there is an air intake frame 32 whose lower end coincides with the standing water level and whose structure and other features are the same as the air exhaust frame 18, etc., and an air supply pipe 33 connected to the top surface of the air intake frame 32.
passes above the water surface of the weir, and the other end opens at a position slightly higher than the standing water level in the air tank 30, and a signal frame 34 set at a position slightly lower than this and slightly higher than the standing water level also opens on the air tank 30. A sub-siphon 35 installed in the tank 30 and connected to the top surface thereof is opened at a position slightly lower than the water surface of the weir, and the other end is opened into the water on the upstream side of the water shield plate 9 in the control equipment room 5. A signal pipe 36 branches off from an appropriate position on the top and is connected to the top of the breaker 26.

In addition, a release pipe 37 opens downward at a position slightly lower than the ventilation membrane 17 in the air supply frame 22 and higher than the standing water level, and the other end is connected to the water storage tank 3 through the weir water surface.
A falling pipe 38 which opens at the top of the air tank 1 and further opens at the bottom of the water tank 31 opens near the bottom of the air tank 30.

The air supply pipe 39 that opens at the top surface of the air tank 30 passes through a sufficiently high position, and then the other end is connected to the backflow prevention tank 1.
It opens downward at a position slightly lower than the upper end of the exhaust pipe 16 in the exhaust pipe 3 .

Exhaust tank 1
An emergency siphon 41a, which is sufficiently large compared to the water supply pipe 40, opens at the bottom of the water supply pipe 40, passes through a crest at the same height as the upper end of the water supply pipe 40, descends to approximately half the height of the weir height, and rises again. It is higher than the innermost downstream surface of the weir body and opens upward into the river downstream of the weir body.
A small diameter drain port 41b is provided on the lower surface near the opening.

Further, the exhaust tank side of the emergency siphon 41a is connected to the air discharge pipe 19 through an air supply pipe 41c having approximately the same height and diameter as the water supply pipe 40, and the emergency siphon 41a
At the top on the opposite side, a fairly small starting pipe 41d branches off and the other end opens at a predetermined height, and a cap metal fitting 41e that closes the upper part and the side of the upper opening is integrated to theoretically activate the siphon. It consists of

Additionally, as an auxiliary safety device, there is a mud drain pipe 42 that penetrates from the upstream side of the water shield plate 9 to the downstream side of the siphon 10.
There is.

A water inlet 43 is provided as an auxiliary device that is temporarily used immediately after installation of the device or after repair, and its upper end opens into the atmosphere and its lower end opens into the portion of the air tank 30 below the river bed.

In addition, as an auxiliary device used when normal means cannot be used to erect the structure due to sedimentation during lodging, a forced riser pipe 44 is branched from the water pipe 7, and the other end is opened into the air at an appropriate height. A water shutoff valve 45 is attached to the water pipe 7 on the downstream side of this branch point.

Furthermore, the upstream opening of the control device room 5 is on the same plane as the river bank, and there is a shielding plate 46 that leaves a water passage near the riverbed, and a shielding plate 46 that leaves a water passage near the riverbed, and downstream thereof, it traverses the entire length from the riverbed to approximately half of the weir height. There is a mud shielding plate 47.

Emergency exhaust pipe 48 used in other emergencies
is branched from the ventilation pipe 8 with an emergency exhaust valve 49. Further, a cleaning pipe 50 is provided at the bottom of the right end of the left section of the water tank 15, and a cleaning valve 51 is provided in the middle.

Next, the operation of the present invention will be explained.

This device automatically adjusts the water level to a predetermined height while standing, automatically collapses during floods, and automatically stands up after the water level has receded. In addition, it is also possible to artificially lie down and maintain that state during times other than floods, but first of all, let's talk about the water level adjustment function.Since the crest 10c of the siphon 10 is slightly lower than the predetermined weir water level, When the river water level upstream of the weir body approaches a predetermined height, the siphon 10
An overflow occurs from above the crest of the siphon 10, and the air inside the siphon 10 is carried away by the water flow and discharged.
Until the upstream river water level reaches a predetermined height, it is replenished by a series of passages from the air guide pipe 20 to the breaker 26.

Due to the influence of the siphon 10 on the crest, the water level at the opening of the water pipe 7 is slightly lower than the water level of the upstream river, but the water level at the outer tube 3 of the weir body 1
The circumference of the inner tube 4 and the amount of air inside the inner tube 4 are made sufficiently large so that the water level can be raised to a level slightly higher than a predetermined level even at this water level.

Therefore, the water level of the upstream river is reliably raised to a predetermined height, but when the water level reaches the predetermined level, the saw-shaped opening 26a of the breaker 26 is partially submerged and blocked, restricting the air supply to the siphon 10. Ru. As a result, a so-called siphon effect occurs within the siphon 10, and its flow rate increases significantly. On the other hand, water is supplied to the section with the openings of the water pipe 7 and the siphon 10 through the water port 9a on the water shield plate 9.
Therefore, the water level in this part is kept lower than the water level upstream of the weir body, and the increase in water pressure inside the weir body through the water pipe 7, and hence the rise of the weir body, is restricted, and the upstream river water level is kept at a constant water level. can be suppressed to
When the river flow rate increases and the upstream river water level rises slightly, this regulating effect becomes even stronger, the water inside the weir is discharged, and the weir top and, ultimately, the upstream river water level return to their original state.

It is clear that if the river flow decreases, the opposite effect will work and the upstream river water level will immediately recover. In this way, the series of adjustment actions that begin with the submergence of the saw-shaped opening 26a need to work more strongly as the river flow rate increases. Therefore, theoretically, the higher the flow rate, the higher the water level of the upstream river will be in equilibrium.However, since the height of the saw-shaped opening 26a is small, in practice the water level is kept at a level that can be considered almost constant. The range of fluctuations will be reduced.

Next, the action of the emergency waterway 9b when the river flow rate increases significantly will be explained. As the river flow increases, the water head inside the weir, that is, the height of the water surface taken out into the atmosphere by the manometer, becomes considerably lower.
If the siphon 10 is disconnected due to inhaling too much air, the water supplied through the water inlet 9a will be
All of the water flows into the weir body, and the water level of the upstream river rises significantly. On the other hand, since no overflow occurs on the crest of the siphon 10, the water level adjustment function is lost. Therefore, an emergency waterway 9b is provided, and when the water level of the upstream river rises considerably, overflow water from this part starts overflowing from above the crest of the siphon 10, and the water level adjustment function is immediately restored. and is configured to adjust the water level to a predetermined level.

Next, the function of lodging due to flooding, that is, the natural lodging function will be explained. As mentioned above, when the river flow increases, the water level adjustment function works, and the weir top and
As a result, the position of the inner tube 4 is lowered and finally comes into contact with the outer tube 3 on the river bed. In this state, the inner tube 4 becomes an obstacle and the upstream river water level cannot be lowered any further, so the upstream river water level rises too much and the saw-shaped opening 26a is completely submerged. As a result, the air supply to the siphon 10 is slightly smaller than the air intake port 2.
6b, the air supply amount is insufficient, the negative pressure inside the siphon 10 increases, the water level inside the water suction pipe 28 rises, and finally the water injection pipe 25
Water is injected into the control tank 12 through the air supply pipe 23.
The lower end of the tank is submerged in water, and the air supply to the water tank 15 is completely cut off.
Water is sucked from the water pipe 27 and the water pipe 29 by negative pressure, and the water level in the water tank 15 rises to the upper end of the intake port 26b. At this stage, the air supply to the breaker 26 is completely cut off, so a siphon is also formed in this part, and the water in the water tank 15 is violently discharged, but the water conduit 27 has a small cross-sectional area. Therefore, the water in the air discharge pipe 19 is strongly sucked in, and the water level in this area is lowered. Therefore, the water pressure in the exhaust tank 11 becomes low,
The water surface in the tank is pushed down to the lower end of the air release frame 18 by the air pressure, and exhaust is started all at once. At that time, when the exhaust tank 11 is sealed with water immediately before standing up, which will be described later, the air remaining in the water supply pipe 40 is
The water is sucked into the backflow prevention tank 14, and the water level in the tank becomes slightly lower than the upper end of the water supply pipe 40, but the planar area of the tank is sufficiently large compared to the volume of the water supply pipe 40. This height difference is slight, and the lower opening of the water supply pipe 40 is sufficiently low and submerged in water, so drainage from the air discharge pipe 19 for exhaust is not obstructed at all. Immediately after the start of exhaustion, the water pressure at the lower opening of the water supply pipe 40 disappears instantaneously, so this water and some of the water in the air discharge pipe 19 fall again, and the lower end of the air discharge frame 18 is submerged in water. However, since the planar area of the exhaust tank 11 is sufficiently large, the gap between the ventilation membrane and the water surface is sufficiently large, and the ventilation membrane has already come into contact with the air on both the upper and lower surfaces and has regained its breathability. The inside of the tube 4 is in communication with the atmosphere without any resistance, and the air inside is pushed by the water pressure and completely exhausted. At this time, if there is a full-scale backflow through the water pipe 29, it will hinder the exhaust, but since the upper end of the water pipe 40 is higher than the water head in the water tank 15 at the time of starting the exhaust, Backflow is prevented within the backflow prevention tank 14.

In addition, the water in the outer tube 3 also flows through the water pipe 7.
and is discharged via the siphon 10,
The weir body will completely collapse.

In addition, we would like to add some additional information regarding the problem of sedimentation within the equipment regarding the lodging function. At the start of lodging, control tank 1
As for the water injected into the tank, there is almost no water replenished from the water conduit 27 during the water level adjustment, and the water is completely still, so the amount of infiltration of earth and sand can be ignored.

Furthermore, the water sucked into the left section of the water supply tank 15 has been in the exhaust tank 11 for a long time, so there is no problem. Furthermore, during lodging, the water sucked from the water pipe 27 contains a large amount of sediment, but since it goes directly to the breaker 26, sedimentation is a problem for the right side compartment, regardless of the left side compartment of the water tank 15. However, as will be explained later, this part is cleaned and drained immediately before standing up, so there is no problem.

Further, since this water flow only occurs during the lodging process and remains stationary in the lodging state, there is no problem in terms of quantity.

Note that during standing up, water that flows into the air tank 30 and the water storage tank 31 through the secondary siphon 35 due to the natural pressure of the flowing water flows into the control device room 5 due to the collapse.
As the water level in both tanks decreases, the water tends to flow out, but the release pipe 3 opens above the river bed in both tanks.
Since the other end of each pipe, such as No. 7, is submerged in water before that, the water column is sucked up to the vertical part of the other end, and the pressure is balanced. Therefore, the destruction of the reservoir is automatically prevented.

Next, we will explain the function of automatically standing up after water is reduced. Between the control tank 12 and the flowing water of the downstream river, there is an air supply pipe 23 and a breaker 26 at the time of collapse.
A siphon is formed by the siphon 10 and the siphon 10 . Therefore, in the lodging state, if the artificial lodging valve 21 is open, the water level in the control tank 12 is completely linked to the river water level, and when the river water level drops to the lower end of the intake frame 32, first Air enters the frame and restores the permeability of the ventilation membrane. On the other hand, since the other end opening of the intake pipe 33 is under negative pressure, air is automatically sucked into the air tank 30, and the water is removed. It is discharged through the secondary siphon 35 and the siphon 10. Furthermore, during intake, the lower end of the air supply frame 22 is lower, so the opening of the release pipe 37 is still underwater, the water in the water tank 31 remains stationary, and air supply does not start.

However, the river water level, and even the control tank 1
If the water level in the air supply frame 2 suddenly drops,
If the pressure difference between the inside and outside of the ventilation membrane 2 becomes too large, air may enter from this part before the intake is completed, resulting in incomplete air supply and, by extension, incomplete erection of the weir body 1. When the water level drops to the lower end of the water injection pipe 25, air enters the breaker 26 from a high position in this part, and the siphon is cut off. Since it is set high, the water level will not drop any further and air supply will not start during intake.

Furthermore, after the siphon of the breaker 26 is cut, air enters the siphon 10 and the sub-siphon 35, and if the siphon in these parts is cut, it becomes impossible to drain the intake air, but the water suction pipe 2
Since the diameter of the pipe 8 is extremely small, air does not enter all parts at once, and air enters the upper part of the water tank 15, which is located at a higher position than the parts where air cannot enter. Most of the water corresponding to this amount falls into the control tank 12 through the air supply pipe 23, and the lower end of the water injection pipe 25 is submerged in water again, so it is safe.

If the river water level rises again during intake, the intake is stopped, and as the river water level rises, water flows into the air tank 30 through the secondary siphon 35, and the air that has already been inhaled flows into the air pipe 3.
9, is released into the atmosphere through the exhaust pipe 16, the air discharge pipe 19, etc. When the water rises further and the flood level reaches the crest of the emergency siphon 39a, water will enter the exhaust tank 11 through this portion, but all of these operating devices will be submerged without any problem. That is, as mentioned above, when the river water level drops to the lower end of the water injection pipe 25 during intake into the air tank 30, the siphon in the breaker 26 is disconnected, but the water in the control tank 12 flows through the air supply pipe 23. , the water conduit 27, and the siphon 10, it communicates with the river water, so when the water decreases to the lower end of the intake frame 32 again, intake starts, and the water in the air tank 30 is discharged through the sub-siphon 35. When the water level in the tank reaches the lower end of the signal frame 34, the secondary siphon 35
Air enters the water tank 15, drainage and intake are stopped, and air enters the water tank 15 through the signal pipe 36.
The water in the tank is released from the negative pressure and falls into the exhaust tank 11, but as in the above example, during lodging,
When the exhaust tank 11 and the like are full of water due to flooding, excess water is discharged from the emergency siphon 41a, the siphon in the siphon 10 is also cut off, and preparations for standing are completed. At this time, the air in the backflow prevention tank 13 is pushed to the top of the inner tube 4, and it goes without saying that the backflow prevention tank 13 also gets flooded with water. In this way, air enters in order from the higher part, but also enters into the air supply pipe 23,
The water falls into the control tank 12. In addition, as in the above example, the river water level drops rapidly during intake, and water above the upper end of the air supply pipe 23 does not fall into the control tank 12 due to the air supply from the lower end of the water injection pipe 25. If so, the minute also falls when the intake is completed. Therefore, the difference in height between the upper end of the air supply pipe 23 and the upper end of the intake port 26b is made as small as possible within the necessary limit.
Since the plane area of is sufficiently large, the release pipe 3
The bottom end of 7 will not be submerged in water. Therefore, due to the lowering of the water level, the lower surface of the ventilation membrane of the air supply frame 22 is first exposed and the ventilation is restored, and then the water column formed in the vertical part of the release pipe 37 falls and the water storage Tank 3
Air is sucked in by the large negative pressure on the top surface of the water tank 31, and the water in the water tank 31 is released from the negative pressure and falls into the air tank 30 through the drop pipe 38.
Until the water level inside 0 rises and the lower ends of the intake pipe 33 and sub-siphon 35 are submerged in water, air passes through both of these routes, joins the air guide pipe 20 again, and is released into the atmosphere. When the lower end of the tube is submerged in water, the air pressure increases, and the inner tube 4 flows through the air tube 39 and the ventilation tube 8 against the slight resistance caused by the submergence of the left end of the air tube 39 and the water pressure being received by the inner tube body. Air is blown inside.

As the air supply progresses, the water level in the air tank 30 rises, while the water level in the water storage tank 31 falls, and the height difference between the water levels in both tanks, that is, the atmospheric pressure, decreases, so when using a blower machine. There is no need for a device to prevent supercharging like this. On the other hand, if the inner tube receives excessive water pressure due to rising river water, the air supply will be interrupted, so in fact, the air supply must be carried out all at once. When the air supply is completed, the flowing water is first dammed up only by the expansion of the inner tube 4, and then this water flows into the outer tube 3 through the crest of the mud shield plate 47, the water inlet 9a and the water pipe 7. The water flows in, buoyancy acts on the inner tube 4, and the crest of the weir rises, achieving the water level adjustment function described above.

Next, the function of the automatic safety device that automatically operates when the above device does not operate normally will be explained. A drainage port 41b is provided at the exit of the emergency siphon 41a, and since this position is above the water level of the downstream river and the inside of the cap 41e is open to the atmosphere, the inside and outside water surfaces are completely the same. Therefore, when the weir body 1 does not collapse during a predetermined flood and the water level of the upstream river rises to the starting pipe 41d, water flows into the outlet side of the emergency siphon 41a, and the amount of water flowing in is much larger than that at the drain port 41b. First, the area around the exit of the emergency siphon 41a becomes full of water, and the air inside is blocked from the outside world, carried away by the running water, and discharged.However, the starting pipe 41d is installed at the top of the emergency siphon 41a. Therefore, the air on the right side of the emergency siphon 41a is also exhausted, and a siphon is formed within the safety device 41. This phenomenon first occurs in the starting pipe 41d.
Water flows in from the entire circumference of the opening, and the water surface inside the cap 41e rises due to only a small amount of air entrainment, so the water flow becomes more intense and synergistically progresses extremely quickly. However, since the cross-sectional area of the starting pipe 41d is only a fraction of that of the emergency siphon 41a, the water level in the air discharge pipe 19 and the water pressure in the exhaust tank 11 drop rapidly, and the water level in the exhaust tank 11 decreases. The air frame 18 is pushed down all at once to the lower end and exhaust begins. Immediately after starting exhaustion,
Water and air discharge pipe 1 on the right side of the emergency siphon 41a
A part of the water in the exhaust tank 9 falls into the exhaust tank 11 again, but the ventilation membrane 17 of the air exhaust frame 18 is not submerged in water, and exhaust continues through this part. In addition, at the time of starting exhaustion, the emergency siphon 4 is
Air is supplied into 1a, the siphon is disconnected, and no backflow occurs.

However, although water continues to fall from the starting pipe 41d for a while, the crest part of the emergency siphon 41a is located further toward the exhaust tank 11 than the right end of the starting pipe 41d, and the cross-sectional area of the emergency siphon 41a on the exit side is also Since it is sufficiently large, exhaust air is not obstructed by this, and since the upper end of the partition plate 15a is above the river water level, intrusion of river water through the water conduit pipe 27 is also prevented, and the Exhaust is performed. In this case, the water inside the outer tube 3 is not forcibly discharged, but when the upstream river water level drops to the upper end of the mud shield plate 47, the inside of the outer tube 3 is insulated from the upstream river water level, and the water flow pipe 7. The sludge is communicated with downstream river water through the water inlet 9a and the sludge pipe 42, and is completely discharged due to the difference in water pressure inside and outside the weir body.

Next, we will explain the function of artificially laying down a tree in non-flood conditions, maintaining that state, and raising it again. This function is useful when it is necessary to lie down due to usage requirements, as well as for inspection, air replenishment by renewing air in case of air leaks, and sweeping away sediment from upstream rivers. First, in order to collapse the weir body, the artificial collapse valve 21 is closed. By this,
Since the supply of air to the siphon 10 is cut off, the negative pressure generated in the siphon 10 increases and the control tank 1
2, the water in the air discharge pipe 19, etc. is discharged, and the structure collapses through the same process as automatic collapse during a flood. If the artificial lodging valve 21 is left closed, it will continue to lie down, and if it is opened, it will of course stand up. These lodging and raising mechanisms are exactly the same as those that occur automatically during floods, so the presence or absence of abnormalities can be checked reliably and easily at all times, making it extremely safe.

Next, we will explain the measures taken immediately after installation. Once in use, all operations are performed automatically, but immediately after installation, water is first poured from the opening of the air discharge pipe 19 until water comes out from the outlet of the emergency siphon 41a, and then water is poured into the water inlet 43.
Water is poured into the inner tube 4 until it is completely inflated. No matter how excessive these water injections are,
There is no problem at all.

Next, a provisional structure in the event of an abnormality will be explained.

If the water tank 31 is not completely airtight and does not stand up completely, water can be poured from the water inlet 43 in the same way as immediately after installation, and the tank 31 will be able to stand up completely.

If it is predicted that it will be difficult to raise the weir due to sediment on the weir, the artificial lodging valve 21 should be closed before the weir starts to erect, the water shutoff valve 45 should be closed, and the forced upright pipe 44 should be closed. After repeatedly injecting water and forcing the river to stand up halfway, the water shut-off valve 45 was opened to let it lie down, and the sediment was swept away by the dammed river water, and then the artificial lodging valve 21 was opened. If you open it, it will stand up normally. If the air leakage in the inner tube 4 is severe enough that the water level of the upstream river has fallen so low that there is no overflow above the crest of the siphon 10, first close the water shutoff valve 45 and drain the forced riser pipe 44. , the height of the weir is raised until water flows out from the outlet of the siphon 10, the artificial lodging valve 21 is closed and exhaust is started, the water shutoff valve 45 is opened to completely lodge, and then the artificial lodging is started. When the valve 21 is opened, the valve 21 automatically stands up, and at this time the air inside the inner tube 4 is renewed, producing the same effect as replenishing the air. After that, pay attention to the drop in the weir water level, close the artificial lodging valve 21 while there is still overflow from the siphon 10, and open the same valve as soon as it starts to lodge, and the lodging and rising will occur automatically. Therefore, even if there is some air leakage, use can be continued temporarily with a little effort.

Further, if there is an abnormality in the device that should normally operate and the safety device 41 is activated, the water in the water tank 31 will flow out and be lost, and the weir body will not stand up, so the abnormality can be confirmed.

At that time, it goes without saying that inspection and repair should be carried out, but after that, after injecting water from the air discharge pipe 19 as in the case immediately after the above-mentioned installation, if water is injected into the air tank 30 through the water inlet 43, the weir body 1 will be erected. do.

Furthermore, if none of the above-mentioned devices operate, it is of course possible to artificially open the emergency exhaust valve 49 and cause it to collapse.

Next, countermeasures against dust and sedimentation of sand and sludge inside the equipment will be explained. Floating dust is prevented from entering by the shielding plate 46, and is washed away by the running water.
Sand and mud intrude into the control equipment room 5 first through the mud shield plate 4.
7, but a mud drainage pipe 42 is provided directly below the water conduit 27 and the sub-siphon 35, which open slightly near the bottom of the water, to prevent dirt from entering the equipment. However, there are times when special cleaning is required, so all parts can be cleaned by injecting water from the air discharge pipe 19, air guide pipe 20, water inlet 43, and forced riser pipe 44.
The cleaning valve 51 and the water shutoff valve 45 must be kept open.

(Effects) As described above, this device has no mechanical parts, has a simple structure, has few failures, is inexpensive, and has no mechanical parts.
Without the use of power or human intervention, it automatically maintains a constant water level when in an upright position, regardless of the river flow rate, and collapses during floods and collapses during low water levels. It has an automatic safety device that stands up and falls down even if the above device is abnormal,
Moreover, not only can it be artificially lowered at any time, but it also makes it possible to easily and comprehensively inspect all parts for abnormalities, which is extremely convenient and safe.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a sectional view of the weir body showing the structure of the weir body, and Fig. 3 is a system diagram of the device for operating the weir body in the present invention. be. 1... Weir body, 3... Outer tube, 4... Inner tube, 5... Control device room, 6... Air supply device, 7
...Water pipe, 8...Vent pipe, 9...Water shield plate, 10...Siphon, 11...Exhaust tank, 12...Control tank, 13...Backflow prevention tank, 14...Backwater flow prevention tank, 15...Water supply tank, 15a... Partition plate, 16...exhaust pipe, 17...ventilation membrane, 18...air release frame, 19...air release pipe, 20...air guide pipe, 21...artificial lodging valve, 22...air supply frame, 23...air supply pipe, 24...U-shape Pipe, 25...Water injection pipe, 26...Breaker, 27...Water pipe, 28...Water intake pipe, 29...Water pipe, 30...Air tank, 31...Water tank, 32...Intake frame, 33...Intake pipe, 34...Signal frame , 35... Secondary siphon, 36... Signal pipe, 37... Release pipe, 38... Falling pipe, 39... Air pipe, 40... Water supply pipe, 41... Safety device, 41a... Emergency siphon, 41b... Drain port, 41c... Air supply pipe, 41d...starting pipe, 41e...
Kasa hardware, 42...Sludge drain pipe, 43...Water inlet, 44...Forced riser pipe, 45...Water shutoff valve, 46...Shielding plate, 47...
Mud shield plate, 48...Emergency exhaust pipe, 49...Emergency exhaust valve,
50...Washing pipe, 51...Washing valve.

Claims (1)

[Claims] 1. A bag-shaped weir body 1 provided across a river;
a control device room 5 communicating with the river upstream of the weir body 1;
A siphon 10 is provided to connect a water inlet 9a provided on the side surface of the control device room 5 to the downstream river, and the other end of the water pipe 7 that opens into the weir body 1 is positioned at the opening 10a of the siphon 10 to open it. A ventilation pipe 8 for supplying and exhausting air is connected to the weir body 1, and the ventilation pipe 8 is connected to the air tank 30 of the air supply device 6 via the backflow prevention tank 13 and the air supply pipe 39. The other end of the falling water pipe 38 that opens at the bottom of the water tank 31 above the air tank 30 opens at the bottom of the air tank 30, and one end of the sub-siphon 35 opens slightly above the standing water level of the air tank 30. The pipe is installed at a position slightly lower than the water level raised by the weir, and the other end is connected to the control equipment room 5.
The other end of the exhaust pipe 16 opens at a position slightly higher than the dam-up water level in the backflow prevention tank 13 and opens at the upper part of the exhaust tank 11. The other end of the water supply pipe 40, which communicates with the atmosphere through
It opens at a position slightly higher than the internal weir raising water level,
The water pipe 29 that opens at the bottom of the backwater flow prevention tank 14 extends downward and is reversed at a position below the river bed.
The other end of the U-shaped pipe 24 opens at the same height as the upper end of the water supply pipe 40 in the water tank 15, and the lower end of the U-shaped pipe 24, which has one end opened near the upper end of the water tank 15, is located at a height below the river bed. Invert,
The other end opens at a position slightly higher than the standing water level in the control tank 12, and the inside of the control tank 12 is communicated with the atmosphere through an air guide pipe 20 equipped with an artificial collapse valve 21.
A water injection pipe 25 that opens at a position below the standing water level in the control tank 12 extends upward and has a height approximately equal to the top of a breaker 26 (described later). A breaker 26 is inverted and extends downward, opens downward near the bottom of the right compartment in the water tank 15, and opens at the top of the siphon 10.
extends upward, inverts at a height position forming a siphon only when the control tank 15 is toppled, extends downward, opens in a saw-like shape at the height of the weir raising water level in the right section of the control tank 15, and A water conduit 27 that opens at the bottom of the right side extends downward, inverts at a height below the river bed and extends upward, and opens into the water in the control equipment room 5 at a height slightly lower than the standing water level. The water pipe 25 and the top of the breaker 26 are connected by a small water suction pipe 28, and the lower end of the air supply pipe 23 opens at a height slightly lower than the standing water level in the control tank 12, and the upper end thereof is connected to the water supply tank 1.
The air supply pipe 2 opens near the top of the left compartment of the air supply pipe 2.
One end of the open pipe 37 inserted into the control tank 12 is located at the lower end of the air supply pipe 23, the other end is opened at the top of the water tank 31, and one end is opened at the height of the standing water level in the control tank 12. , an air supply pipe 33 with the other end opened at a position slightly higher than the standing water level in the air tank 30 is disposed, the tops of the breaker 26 and the sub-siphon 35 are communicated with each other by a signal pipe 36, and a safety device 41 is connected emergency siphon 4 with
One end of 1a opens near the bottom of the exhaust tank 11 and extends upward, turns around at a position slightly higher than the dam raising water level and extends downward, turns around again and opens the other end diagonally upward into the river. , a starting pipe 41d connected to the upper end of the emergency siphon 41a opens into the air at a position slightly higher than the dam raising water level, and a position midway between the air discharge pipe 19 and the emergency siphon 41a is communicated with the air supply pipe 41c. A fully automatic control device for a bag weir featuring: