JPH0370045B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention provides a flexible membrane weir that rises when fluid is fed and collapses when discharged, and the water level on the upstream side of a river dammed by the membrane weir. The present invention relates to an automatic lodging device that drains the fluid in the flexible membrane weir and automatically collapses the flexible membrane weir when the water level reaches an abnormal water level exceeding a predetermined value.

[Prior art]

Flexible membrane weirs, commonly referred to as rubber weirs, expand and contract by introducing and discharging fluids such as air and water. Widely used for water intake and seawater damming at river mouths. In such flexible membrane weirs, if the water level becomes abnormally high due to localized heavy rain, etc., unless the amount of water passing through the membrane weir is increased in response to this rise in water level, the upstream of the weir will be damaged. There is a risk of flooding in the neighboring basin.

Therefore, such flexible membrane weirs are equipped with an automatic lodging device, which drains the fluid in the membrane weir and collapses it when the river water level on the upstream side of the membrane weir is detected. The river water level upstream of the membrane weir is lowered.

For this purpose, conventional automatic lodging devices, as seen in Japanese Patent Application Laid-Open No. 54-79928, have been developed to collect water from the river upstream from the membrane weir through an inverted U-shaped pipe. The fluid in the membrane weir is discharged through the valve by guiding the fluid into the bucket and opening the discharge valve as the weight of the bucket increases.

[Problem to be solved]

However, in such conventional automatic lodging equipment, when the river water level upstream from the flexible membrane weir exceeds a predetermined abnormal water level and river water is injected into the bucket from the inverted U-shaped pipe, the bucket Since the butterfly valve is designed to open when the weight is transmitted to the butterfly valve via the wire and lever and exceeds the operating force of the lever required to open the butterfly valve, the butterfly valve must be made larger. There is a risk that the butterfly valve will not be able to adapt to changes in the opening resistance of the butterfly valve, and even if the river water level reaches an abnormal level, the butterfly valve will not be able to open and the flexible membrane weir will not be able to collapse automatically.

Furthermore, as the bucket becomes larger, the river water level upstream of the flexible membrane weir exceeds the abnormal water level, and the time from when river water begins to be injected into the bucket until the butterfly valve is switched due to the weight of the bucket becomes longer. The response of the automatic lodging operation of the flexible membrane weir is poor.

Furthermore, in order to erect the flexible membrane weir after lodging, the water inside the bucket must be discharged into the operation room outside the bucket, and a worker must enter the operation room and drain the discharged water outside the operation room. Cleanup work is required to remove it.

[Means and effects for solving the problem]

The present invention relates to an improvement of an automatic lodging device for a flexible membrane weir that overcomes these difficulties. The valve is a butterfly valve, and a lever is integrally attached to a rotating shaft of the butterfly valve pointing upward, and a weight is integrally attached to the lever.
Two stoppers are arranged to lock the lever in a state where the weights are located on both sides of the vertical plane passing through the valve rotation axis, respectively, and the valve is stopped by the flexible membrane dam. A bucket bar communicating with the river upstream from the membrane weir and having a height substantially the same as the abnormal water level is provided so as to be able to move up and down, and transmits the weight of the bucket bar increased due to the abnormal water level rise of the river upstream of the membrane weir to the lever. A butterfly valve opening transmission means is provided for rotating the butterfly valve from a closed state to an open state, and an operation chamber is disposed near the lever, and the butterfly valve is closed from the lever swing position of the open state of the butterfly valve. The present invention is characterized in that a return means for returning the lever to its original swinging position is interposed between the lever and the operation chamber.

Since the present invention is configured as described above, when the river water level on the upstream side of the upstream flexible membrane weir exceeds a predetermined abnormal water level, the upstream river water enters the bucket. As the weight of the bucket increases, the lever, which is locked to one stopper, is moved by the butterfly valve opening transmission means.
When one valve swings from the closed tilt state to the other valve open tilt state beyond the vertical state, the valve opening swing moment due to the gravity of the weight at the tip of the lever acts on the lever, causing the lever to move toward the other stopper. It swings until it is locked, and a butterfly valve connected to the lever is opened, thus draining the fluid in the flexible membrane weir and automatically collapsing the flexible membrane weir.

In addition, in the present invention, in order to erect the fallen flexible membrane weir, the lever, which is engaged with the other stopper of the butterfly valve in the open lever swing position, is raised vertically by the return means. Then, if the butterfly valve on the opposite side is further swung toward the closed state lever swiveling position, the valve closing swiveling moment due to the gravity of the weight at the tip of the lever will act on the lever, and the lever will move from one side to the other. The lever swings until it is stopped by the stopper, the butterfly valve connected to the lever is closed, and the flexible membrane dam becomes ready to stand.

In this way, in the present invention, the moment for opening and closing the butterfly valve is generated not by the gravity of the bucket but by the gravity of the weight at the tip of the lever, so there is no need to increase the size of the bucket, and the entire device can be made smaller. This makes it possible to improve the responsiveness of the automatic lodging operation.

Furthermore, in the present invention, when the flexible membrane weir is collapsed, the water in the bucket communicating with the river upstream from the flexible membrane weir is naturally drained, so that the water in the bucket connected to the river upstream from the flexible membrane weir is naturally drained. There is no need for cleanup work such as entering the operation room and draining the water in the bucket.

〔Example〕

An embodiment of the present invention illustrated in FIGS. 1 to 3 will be described below.

As shown in FIG. 1, a rubber weir 1 for purchasing a flexible membrane weir is composed of band-shaped rubber sheets, which are joined together to form a sealed space inside. The front end of this rubber dam 1 is connected to a holding plate 2.
And it is fixed to the bottom of the river by an anchor bolt 3.

Further, the bottom of the rubber weir 1 is communicated with a feed/discharge pipe 4, and this pipe 4 is further connected to a feed pipe 5. This feed pipe 5 is connected to a pump 7 provided in an operation chamber 6.

Therefore, by feeding water into the rubber weir 1 using the pump 7, the rubber weir 1 is expanded and erected. Note that if the rubber dam 1 is to be expanded with air, a blower may be used instead of the pump 7.

Furthermore, a discharge valve 8 made of a butterfly valve is attached to the tip end side of the above-mentioned sending/discharging pipe 4. A lever 10 for opening and closing the valve 8 is provided on the operating shaft 9 of the valve 8 . A weight 11 is provided at the upper end of the lever 10, and a pair of arms 12 and 13 are connected to each other and protrude from both sides. The arm 12 is connected to a bucket 15 via a rope 14.
Note that the rope 14 is guided by a pair of rollers 16. A flexible tube 17 is connected to the bottom of the bucket 15, and the tip of this tube 17 is further connected to a water intake pipe 18. This water intake pipe 18 is opened to the river on the upstream side of the rubber dam 1, and is configured to introduce water from the river into the bucket 15.

Further, a rope 19 is connected to another arm 13 provided on the lever 10. The rope 19 passes through an opening 21 formed in the floor 20 of the operation room 6, and is locked to a hook 22 provided on the floor 20. Note that the rope 19 has a sufficient length so that the swinging of the lever 10 is not restricted.

Furthermore, a pair of stoppers 23 and 24 are provided on the side of the lever 10, and these stoppers 23 and 24 control the swing angle (approximately) of the lever 10.
90°) is now regulated.

In the above configuration, when the water level of the river is normal, water is not introduced from the water intake pipe 18 into the bucket 15 through the flexible tube 17. And in this case, Bucket 1
5 and lever 1 connected via rope 14
0 is rotated counterclockwise about the operating shaft 9, as shown in FIGS. 1 and 2, and is in contact with the stopper 23. That is, at this time, a rotational moment due to the weight 11 and a rotational moment due to the empty bucket 15 are acting on the lever 10. Then, if the weight of the weight 11 including the lever 10 and the pair of arms 12 and 13 is Wa, and the arm length of the moment at this time is _l1 , then the rotational moment of the lever 10 due to the weight 11 is Wa・l becomes ₁ .

Also, if the weight of the empty bucket 15 is Wb, and the arm length of the moment exerted on the lever 10 by this bucket 15 is l ₂ , then the lever 10 will receive a rotational moment of Wb・l ₂ due to the bucket 15. Become. These two rotational moments have a relationship in which their rotational directions are opposite to each other, but since these two rotational moments have a relationship as shown in equation (1), Wa・l ₁ >Wb・l ₂ (1), The lever 10 is stably maintained in contact with the stopper 23. The valve 8, which is connected to this lever 10 via the operating shaft 9, is therefore in a closed state, so that no water in the rubber dam 1 can be discharged through the discharge valve 8.

Next, the river water increases due to torrential rain, etc.
If the water level on the upstream side of the rubber weir 1 becomes abnormally high, water will enter the bucket 15 through the water intake pipe 18 and the flexible tube 17. When the amount of water flowing into the bucket 15 exceeds a certain value, the weight of the bucket 15 increases, causing the lever 10 to rotate via the rope 14. What is the weight of Bucket 15 when it contains more than the specified amount of water?
Assuming Wo, as shown in equation (2), Wa・l ₁ <Wo・l ₂ (2), and lever 1 due to bucket 15 filled with water
Since the clockwise rotational moment of 0 is larger than the counterclockwise rotational moment of the weight 11, the lever 10 rotates clockwise about the operating shaft 9 as shown in FIG. become. Therefore, the discharge valve 8 will be opened via this operating shaft 9, and the water in the rubber weir 1 will be discharged via the discharge pulp 4 and the discharge valve 8. Since the lever 10 is rotated slowly at this time, the rubber dam 1 does not collapse suddenly. That is, when water flows into the bucket 15 and its weight gradually increases and exceeds Wo, the lever 10 rotates clockwise as shown in FIG. With this rotation, the rotational moment applied to the lever 10 by the weight of the bucket 15 and the rotational moment applied to the lever 10 by the weight 11 are reversed in direction. That is, when the connecting portion between the rope 14 and the arm 12 moves to the right of the vertical line 25 passing through the center of the operating shaft 9, the bucket 15 is moved to the lever 10 via the rope 14.
The pulling force becomes a force that rotates this lever 10 counterclockwise in FIG. 3, and the rotational moment caused by the weight 11 is also reversed to become a moment that rotates it clockwise. Then, at the position shown by the imaginary line in Fig. 3 where both moments are balanced, equation (3) is established, and Wo・l ₃ =Wb・l ₄ (3) In this state, the discharge valve 8 remains stationary. is maintained in a half-open state, and the water in the rubber weir 1 is gradually discharged.

As the water in the rubber weir 1 is discharged and laid down, the water level on the upstream side of the rubber weir 1 gradually decreases. Therefore, the amount of water in the bucket 15 will also decrease accordingly.
The weight of the bucket 15 will also be reduced.

However, since the force for rotating the lever 10 counterclockwise gradually becomes weaker, the lever 10 is moved by the weight 1.
The discharge valve 8 is gradually rotated clockwise by the gravity of 1, and the discharge valve 8 is finally in a fully open state. When the rubber weir 1 is completely lowered, water will completely flow out from the bucket 15, and as a result, the weight of the bucket 15 will become Wb again. When the lever 10 is completely rotated by the rotational moment of the weight 11 and comes into contact with the stopper 24, the arm length of the rotational moment due to the bucket 15 is defined as _l5 , and the length of the arm of the rotational moment due to the weight 11 is defined as l5. If the length of the arm is l ₆ , then the relationship between the two rotational moments applied to the lever 10 is as shown in equation (4) Wa・l ₅ >Wb・l ₅ (4), and the result is With the valve 8 open, the lever 10 will be stably maintained in the position shown by the solid line in FIG.

As described above, according to the rubber weir 1 lodging device according to the present embodiment, when the rubber weir 1 collapses, the water level on the upstream side of the rubber weir 1 decreases, and the bucket 15 automatically lowers the water level. Since the water flows out into the river, there is no need to take the trouble to remove the water from the bucket 15 in order to reset the lodging device. Therefore, the worker is in the operation room 6.
There is also no need to descend into the basement 26 provided below, thereby eliminating the danger associated with descending into the basement 26. When the rubber dam 1 is to be erected again, the operator just needs to enter the operation chamber 6 and pull the rope 19 through the opening 21 in the floor 20 of the operation chamber 6. Rope 19 is arm 1
3, the lever 10 is rotated counterclockwise by pulling up the rope 19 and returns to its original state as shown in FIGS. 1 and 2. When the lever 10 is rotated, the discharge valve 8 is also closed accordingly. Therefore, in this state, water may be pumped into the rubber weir 1 using the pump 7.

Next, another embodiment different from the embodiment shown in FIGS. 1 to 3 will be described with reference to FIGS. 4 and 5.

In other embodiments, parts corresponding to those in the previous embodiment are given the same reference numerals, and descriptions of parts having the same structure will be omitted.

The feature of this embodiment is that the lever 10 has an inverted T shape.
The reason is that it is used. i.e. lever 1
0 has a weight 11 attached to its upper end and a pair of arms 12, 1 protruding laterally from its lower end.
3 are provided respectively. Here, the rotational moment applied to the lever 10 when the discharge valve 8 is closed as shown in _FIG . If the arm length of the rotational moment applied to the lever 10 by the bucket 15 via the bucket 14 is l ₂ , then the equation (5) becomes, Wa・l ₁ >Wb・l ₂ (5) Water input The moment caused by the weight 11 to rotate the lever 10 counterclockwise is greater than the moment caused by the unattached bucket 15 to rotate the lever 10 clockwise. Therefore, at this time, the arm 12 is in contact with the stopper 23 and is in a stable state.

On the other hand, when the water level on the upstream side of the rubber weir 1 rises and a predetermined amount of water flows into the bucket 15, the weight of the bucket 15 becomes Wo, and the relationship between the rotational moment applied to the lever 10 at this time is(6)
It becomes as shown in Eq.

Wa・l ₁ <Wo・l ₂ (6) Therefore, the lever 10 is rotated clockwise by the rotational moment due to the increased weight of the bucket 15, as shown in FIG. 5, and the lever 10 is rotated clockwise. When the weight 11 moves to the right of the vertical line 25 passing through the center of the operating shaft 9, the rotation moment due to the bucket 15 and the weight increase in order to change the direction. The rotational moment caused by the weight 11 works together to rotate the lever 10 clockwise. Therefore, lever 10 has its arm 13
comes into contact with the stopper 24, and the valve 8 is stably held in the open state.

Furthermore, in this embodiment, even if the lever 10 rotates in the direction to open the discharge valve 8, the bucket
The rotational moment due to the weight of bucket 5 is still in the direction of rotating lever 10 clockwise, and therefore the direction of the rotational moment due to bucket 15 does not change. Therefore, in this case, the lever 10 rotates all at once from the state shown in FIG. 4 to the state shown in FIG. 5, and the discharge valve 8 quickly changes from the fully closed state to the fully open state. . Thus, in this embodiment, the water in the rubber weir 1 flows out at once through the discharge valve 8, thereby achieving lodging in a short time. Therefore, it is extremely convenient for quickly lowering abnormal water levels.

In the embodiment shown in FIGS. 1 to 5, the bucket 15 was suspended via the roller 16, but as shown in FIG. It may be provided on the floor 20 of. That is, a support stand 27 is placed on the floor 20 of the operation room.
A control lever 28 is rotatably supported on the support stand 27, one end of the control lever 28 is connected to the bucket 15 by a rope 29, and the other end is connected to the arm 13 by a rope 30. . The bottom of the bucket bag 15 and the arm 12 are connected by a rope 31.

In this embodiment, when the river water level rises and more than a predetermined amount of water flows into the bucket 15 from the closed state of the discharge valve 8 shown in FIG.
In order to rotate the operating lever 28 counterclockwise via the lever 9 and pull the rope 31 upward, the lever 1
0 rotates counterclockwise to open the discharge valve 8,
Rubber weir 1 collapses.

Even if the operating lever 28 is manually rotated, the lever 10 can be rotated counterclockwise to open the discharge valve 8 in the same manner as described above, and if the operating lever 28 is rotated counterclockwise, the lever 10 can be rotated counterclockwise to open the discharge valve 8. The discharge valve 8 can be closed. Therefore, according to this embodiment, the discharge valve 8 is manually operated on the floor of the operation room.
can be opened and closed at will. In addition, the roller 16 is not required, and the ropes 29, 30, and 31 are set in just the right amount, and the condition of the discharge valve 8 in the basement 26 is reproduced on the floor, so various effects such as being able to understand it at a glance can be expected. .

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view illustrating an embodiment of the lodging device for a flexible membrane weir according to the present invention, and Fig. 2 shows the lodging device in the same embodiment in a state where the discharge valve is opened. FIG. 3 is a front view of the lever when the discharge valve is closed, and FIG. 4 is a second view of the lever according to another embodiment.
FIG. 5 is a front view of the same embodiment as shown in FIG. 3; FIG. 6 is another embodiment of the flexible membrane weir lodging device according to the present invention. FIG. 1... Rubber weir, 2... Holding plate, 3... Anchor bolt, 4... Control room, 7... Pump, 8... Discharge valve, 9... Operating shaft, 10... Lever, 11...
... Weight, 12, 13 ... Arm, 14 ... Rope, 15 ... Bucket, 16 ... Roller, 17 ...
...Flexible tube, 18...Water intake pipe,
19...rope, 20...floor, 21...opening, 2
2...Hook, 23, 24...Stoppa, 25...
...Vertical line, 26... Basement, 27... Support platform, 2
8...operation lever, 29, 30, 31...rope.

Claims (1)

[Claims] 1. In a flexible membrane weir equipped with a discharge valve that rises when fluid is injected and collapses when fluid is discharged, the discharge valve is a butterfly valve, and the butterfly valve has a rotation axis directed upward in a substantially horizontal direction. A lever is integrally attached to the lever, a weight is integrally attached to the lever, and the lever is locked in a state where the weights are respectively positioned on the left and right sides across a vertical plane passing through the valve rotation axis. A bucket is provided which is movable up and down and which communicates with the river upstream from the membrane weir stopped by the flexible membrane weir and has approximately the same height as the abnormal water level. Butterfly valve opening transmission means is provided for transmitting the bucket weight increased due to an abnormal water level rise in a river on the more upstream side to the lever to rotate the butterfly valve from a closed state to an open state;
An operating chamber is disposed near the lever, and a return means for returning the butterfly valve from an open lever swinging position to a closed lever swinging position is interposed between the lever and the operating chamber. An automatic lodging device for flexible membrane weirs, which is characterized by: