JPH0776444B2 - Automatic collapse device for flexible membrane weir - Google Patents

Description

The present invention relates to a flexible membrane weir bag attached to a river bed in a direction transverse to the flow of water, and a fluid (gas or water) inside the flexible bag body. When the river water level rises above a prescribed value due to rainfall, etc., in the case of standing up to block the running water of the river and using the water for irrigation, etc.
The present invention relates to an automatic laying device for a flexible membrane weir that discharges fluid that has been previously fed into the flexible bag body to cause it to contract and lay down, and to flow river water downstream.

2. Description of the Related Art In a known bucket type automatic laying device (Japanese Patent Publication No. 60-4325) for a flexible membrane weir shown in FIG. 4, the amount of upstream water flowing on the upper surface of the flexible membrane weir 01 increases and the automatic laying occurs. When it reaches the water level 02, it reaches the inverted U-shaped pipe 05 (the height of its top corresponds to the automatic falling water level 02) at its end from the water level detection port 03 upstream of the weir, through the water conduit 04, and The water that flows in and flows out from the inside enters the bucket 07 through the flexible hose 06 connected to the end of the inverted U-shaped tube 05. The bucket 07 is attached to one end of a wire 08 and is hung, and the other end of the wire hung via a pulley 09 is opened and closed at a butterfly valve 011 provided at the end of a fluid supply / discharge pipe 010. As described above, as the amount of water flowing from the inverted U-shaped pipe 05 through the flexible hose 06 into the bucket 07 increases, the weight of the bucket 07 increases and the weight of the bucket 07 increases. Weight 01
When the weight exceeds 3, the lever 012 is pivoted upward via the wire 08 to open the butterfly valve 011, whereby the inflation fluid inside the flexible membrane weir that was kept upright is supplied and discharged. The flexible membrane weir 01 is completely contracted into a collapsed state by being discharged into the atmosphere from the open butterfly valve through the pipe 010. The fourth
The figure shows a state in which the flexible membrane weir 01 is erected.

Problems to be Solved by the Invention As described above, in the conventional bucket type automatic laying device, the end of the wire 08 that suspends the bucket 07 is directly fixed to the tip of the opening / closing lever 012 of the butterfly valve 011.

However, along with the increase in the size of the flexible membrane weir, the diameter of the liquid discharge pipe becomes larger, and the butterfly valve also has a larger diameter, which requires a large force to swing the lever for opening and closing it. In the conventional device, the bucket 07
It was necessary to either increase the capacity of or to increase the arm length of the lever because the force acting on the lever is a moment force.

The present invention has been made in view of the above point, and an object of the present invention is to provide a bucket type automatic laying device that can avoid an increase in size of a bucket, a lever, or the like by using a moving pulley.

Means for Solving the Problems The present invention relates to a flexible membrane weir that stands up due to the feeding of a fluid and falls down due to discharge, with a detection opening that is opened upstream of the weir and below the automatic falling water level, and the same detection opening. A bucket connected by a flexible pipe, a wire that suspends the bucket, a discharge valve that communicates with the inside of the membrane barrier bag body, and a lever for opening and closing the discharge valve that can be swung up and down. An automatic laying device including a lever and a moving pulley provided at an end of the opening / closing lever, in which a wire for lifting the bucket is bridged between the constant pulley and the moving pulley.

Therefore, the capacity of the bucket that swings the lever that opens and closes the discharge valve can be reduced, or the length of the lever arm can be shortened.

Example Hereinafter, an example according to the present invention shown in FIG. 1 will be described.

The flexible membrane weir 1 is laid across the river,
A supply / discharge pipe 2 is provided so as to communicate with the inside, and the supply / discharge pipe 2 is connected to a blower 5 via a feed pipe 3 and is connected to a butterfly valve 6 via a discharge pipe 4.

A water conduit 9 extends from a detection port 8 having an opening at a position lower than the automatic falling water level on the upstream side of the flexible membrane weir 1, and a flexible hose 10 is connected to the end of the water conduit 9. The other end of the flexible hose 10 is It is connected to the bottom of the bucket 10.

The bucket 11 is suspended by a wire 12,
The wire 12 is bridged over fixed pulleys 13 and 14 fixed to the upper side and faces downward, and is wound around the lower side of a movable pulley 15 provided at the tip of the valve opening / closing lever 7 of the butterfly valve 6 by a half turn. The ends are fixed at.

An arm member 16 extends from the base end portion of the valve opening / closing lever 7 in a direction perpendicular to the valve opening / closing lever 7 and a weight 17 is provided at the end portion thereof, and the valve opening / closing lever 7 and the arm member 16 swing together. It is supposed to do.

Now, when the flexible membrane weir 1 is erected, if the water level in the river rises and the upstream water level rises and exceeds the automatic falling water level, the amount of water flowing from the detection port 8 into the bucket 11 via the water conduit 9 exceeds a certain limit. The bucket 11 is lowered.

When the bucket 11 is lowered, the moving pulley 15 is raised and the valve opening / closing lever 7 opens the butterfly valve 6 and the flexible membrane dam 1
The air inside is discharged to collapse the flexible membrane weir 1.

At this time, the upward force for swinging the valve opening / closing lever 7 is divided into two by the moving pulley 15, and the wire 12 may be pulled with a half force, so that the capacity of the bucket 11 can be reduced.

Alternatively, the arm length of the valve opening / closing lever 7 can be halved.

When the upstream water level drops, the water in the bucket 11 automatically escapes through the flexible hose 10 and the water conduit 9.
As shown in the figure, the weight 17 acts to maintain the belt opening / closing lever 7 in the open state, so that the positions of the bucket 11 and the valve opening / closing lever 7 are unchanged.

To close the butterfly valve 6, the valve opening / closing lever 7 may be rotated about 90 degrees (clockwise in FIG. 1). At this time, the bucket 11 is drained and lightened so that the valve is easily opened. The open / close lever 7 can be rotated.

Thus, in this embodiment, the flexible membrane weir 1 can be automatically collapsed by using the bucket 11 having a small capacity or the valve opening / closing lever 7 having a short arm length.

Next, FIG. 2 shows an example in which the capacity of the bucket is further reduced.

Water is introduced into the bucket 11 from the water conduit 9 through the inverted U-shaped pipe 20, and the wire 12 that lifts the bucket 11 is hung on the fixed pulley 21 and then the two fixed pulleys are fixed. Pulley 22
Further, it is bridged in turn to two moving pulleys 23 and its end is fixed to the connecting rod 24 of the constant pulley 22.

The tip end of the valve opening / closing lever 7 of the butterfly valve 6 is engaged with the connecting rod 25 of the movable pulley 23.

In the present embodiment, the capacity of the bucket 11 is half that of the previous embodiment, that is, 4 times the force for swinging the valve opening / closing lever 7 upward.
Bucket 11 because you can pull the pulley 21 with a force of 1
The capacity of is only 1/4.

The capacity of the bucket 11 remains the same and the valve opening / closing lever 7
The arm length can be reduced to a quarter.

In this embodiment, the automatic falling water level corresponds to the height of the top of the inverted U-shaped tube 20, and the automatic falling water level can be adjusted by changing the height of the same.

Further, a water drain valve 11a is provided at the bottom of the bucket 11, and if the water drain valve is opened, the water in the bucket 11 is discharged and the bucket 11 becomes lighter.
Rises and the valve rotation lever 7 swings downward to close the butterfly valve 6.

The example using the two fixed pulleys and the moving pulley has been described above, but the capacity of the bucket 11 can be further reduced by further using three or more pulleys.

It is also conceivable to use a differential pulley.

Next, FIG. 3 shows an application example of a multi-span membrane weir in which a plurality of flexible membrane weirs are connected to a river.

Butterfly valves 32, 33 are provided at the ends of the discharge pipes 30, 31 that communicate with the inside of the bag of each membrane weir, and open / close levers 34,
35 is installed.

A movable pulley 36,37 is attached to the counterweight at the tip of the lever 34,35.
Is provided.

And the wire 12 that lifts the bucket 11 is a fixed pulley 38,39
Then, it is wound downward on the movable pulley 37 and is directed upward, and it is suspended on the fixed pulley 40 and directed downward. Further, it is wound on the movable pulley 36 and directed upward, and the end is ceilinged. It is fixed to.

When the water level upstream of the weir exceeds the automatic falling water level, which is the height of the top of the inverted U-shaped pipe 20, water flows into the bucket 11, and the weight of the water causes the bucket 11 to descend, pulling the wire 12 and opening / closing lever 34. , 35 are swung upward to open the butterfly valves 32, 33, and the membrane weirs are laid down.

Since the wire 12 can be pulled by a force that is half the force of directly swinging the opening / closing levers 34 and 35 upward, the capacity of the bucket 11 can be halved.

Alternatively, the arm length of the opening / closing levers 34, 35 can be shortened.

The above shows an example of the case of two membrane weirs, but in the case of three or more membrane weirs, each moving pulley provided at the end of the valve opening / closing lever is
It is sufficient to connect one wire in series as shown in the figure.

Even if a large number of opening / closing levers are rocked, the force required is only half the force of rocking one lever, so that it is not necessary to increase the capacity of the bucket 11, and many membrane weirs can be operated simultaneously. This is effective when controlling lodging.

It is also possible to manually operate each valve independently.

It is also conceivable to connect a plurality of opening / closing levers with a rigid body and swing with one moving pulley.

However, the force required in this case is half the sum of the forces for swinging the respective opening / closing levers, and therefore, the swinging of a large number of open / close levers increases the capacity of the bucket accordingly.

EFFECTS OF THE INVENTION The present invention uses a moving pulley to reduce the capacity of the bucket required to swing the valve for discharging the fluid in the membrane barrier bag body, or to shorten the arm length of the valve opening / closing lever. Therefore, it is possible to effectively cope with the increase in size of the flexible membrane weir or the control of a large number of flexible membrane weirs.

[Brief description of drawings]

FIG. 1 is a side view of a flexible membrane weir fall device according to an embodiment of the present invention, FIGS. 2 and 3 are side views of an automatic fall device according to another embodiment, and FIG. FIG. 6 is a side view of a flexible membrane weir fall device. DESCRIPTION OF SYMBOLS 1 ... Flexible membrane weir, 2 ... Supply / exhaust pipe, 3 ... Inlet pipe, 4 ... Exhaust pipe, 5 ... Blower, 6 ... Butterfly valve, 7 ... Valve opening / closing lever, 8 ... Detection port, 9 ... Water pipe, 10 ... Flexible hose, 11 ... Bucket, 12 ... Wire, 13,14 ... Constant pulley, 15 ... Movable pulley, 20 ... Inverted U-tube, 21,22 ... Constant pulley, 23 ...
Movable pulley, 24,25 ... Connecting rod, 30,31 ... Discharge pipe, 32,33 ... Butterfly valve, 34,35 ... Open / close lever, 36,37 ... Movable pulley,
38,39… Constant pulley, 40… Constant pulley.

Claims (1)

[Claims] 1. A flexible membrane weir that stands up when a fluid is fed in and falls down when it is drained. A detection port that opens upstream of the weir below the automatic water level, a detection port, a water conduit, and a flexible pipe. , A wire that suspends the bucket, a discharge valve that communicates with the inside of the membrane weir bag body, a lever for opening and closing the discharge valve, and an opening / closing lever that can swing up and down. An automatic fall device for a flexible membrane weir, comprising: a moving pulley provided at an end of an opening / closing lever, wherein a wire for lifting the bucket is laid over the constant pulley and the moving pulley.