JPH0375686B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a weir levitation device that lowers and raises an all-pneumatic bag-shaped weir made of a flexible material by letting air in and out.

Conventionally, this type of levitation device for weirs includes a bucket type and a float type. However, since both the bucket type and the float type convey river water into the operation room, civil engineering work for the lower part of the float room, etc. is required, which raises the cost of construction. Further, when standing up, the bucket, float, and standing control device must be reset to stand-up preparation, which is complicated. In addition, since the lodging mechanism involved mechanical operation, there was a risk that the lodging would not fall due to rust, etc.

The present invention has been made in view of the above-mentioned problems, and eliminates the need to install a water pipe for water level detection in the operation room, resulting in a significant reduction in civil engineering costs.
The weir can be lowered while looking at the weir even on the embankment, and the weir can be lowered even in the operation room, making it easy to operate.Furthermore, if the weir is below the undulating water level, it can be raised by pumping air. It is an object of the present invention to provide a weir raising and lowering device that is capable of eliminating the need for a lowering mechanism and resetting surplus air pressure.

For this reason, the configuration of the weir undulating device of the present invention is such that a bag-shaped weir made of a flexible material is installed across the river, and the weir is connected to a blower installed on the side bank via a stop valve. and an air supply pipe having an overturning valve in the operation chamber that communicates with the atmosphere is connected to the side of the weir, and the upstream flowing water is connected to the weir through a cut-out weir, and
An operating device pit is provided that communicates with the downstream flowing water via a two-stage siphon pipe, and the end of the surplus air exhaust pipe, which communicates with the air supply pipe via a switching valve, is placed underwater at a height below the river bed. The exhaust pipe, which communicates with the position above the water surface of the surplus air exhaust pipe, hangs down to the vicinity of the riverbed, bends its lower end into a U-shape, extends upward again, and opens into the water in the operating device pit. The lower end of the pipe and the lower end of the water sealing pipe located near the water surface are communicated, the upper part of the water sealing pipe is communicated with the top of the upper siphon, and the communication pipe branched from the water sealing pipe extends downward and then upward again. The upper part of the water sealing pipe is connected to the middle part of the falling/erecting water level detection pipe, and one side extends upward from the middle part of the falling/erecting water level detecting pipe. The siphon is inverted and extends downward, and opens to a portion below the water storage level in the upstream vertical portion of the siphon, and the other extends downward from the intermediate portion, and is inverted and extends upward at the height of the standing water level;
It is characterized in that a manual lodging valve is installed to open at the level of the lodging water level.

With the above configuration, the present invention can send air to the weir using a blower and operate the stop valve to raise the weir. When the weir is erected, the switching valve and manual lodging valve are opened, and when the upstream water level is between the lodging water level and the storage water level, no water is flowing from the intermediate part of the lodging/erecting water level detection pipe to the other. When the water level reaches the lodging level, water flows in from the manual lodging valve and is cut off from the outside air, forming a siphon, and the water in the operating device pit is discharged downstream, creating a negative pressure inside and the air inside the weir flowing through the opening of the exhaust pipe. It is possible to enter the operating device pit and lower the weir.

An embodiment of the present invention will be described below based on the drawings.

In FIGS. 1 and 2, numeral 1 is a bag-shaped weir made of a flexible material, numeral 2 is an operating shed provided on the side bank, and numeral 3 is an operating device pit attached to a slope 4. Reference numeral 5 denotes an air blower installed in the operation shed 2, which forces air to be sent to the weir 1 via an air pipe 8 having an upper valve 6 and an operation room lodging valve 7 also arranged in the operation shed 2. be. 9 is a driving source for the blower 5. The operating device pit 3 communicates with the upstream flowing water A via a cut weir 10 and with the downstream flowing water B via a two-stage siphon pipe 11. Reference numeral 12 designates a surplus air exhaust pipe that extends into the weir 10, has an open tip, has a switching valve 13, and communicates with the air supply pipe 8; is a U-shaped exhaust pipe. The branch portion 14a at the lower part of the exhaust pipe 14 is the open end 12a of the surplus air exhaust pipe 12.
It is located slightly lower than the Reference numeral 15 is a water sealing pipe having a communication pipe 16 whose lower part communicates with the lower part of the exhaust pipe 14, whose upper part communicates with the siphon pipe 11, and which has a U-shape at its lower part.
Reference numeral 17 denotes a falling/erecting water level detection tube, the upper end of which extends downward in an inverted U-shape at the falling water level a, and one end of which is inserted from above into the upstream vertical portion of the siphon tube 11 to store water. The upper part of the water sealing pipe 15 is opened at water level b or below, and the other end extends downward. On the way, the upper part of the water sealing pipe 15 communicates with the middle part of the part above the water storage level b, and it further descends from the middle part, and the lower end part is at the standing water level c. From there, it is inverted into a U-shape and extends upward, and the tip reaches the lodging water level a, and a manual lodging valve 18 is attached thereto. Further, the height of the lower part 11a of the two-stage siphon tube 11 is located slightly lower than the water storage level b. Note that the switching valve 13 and manual lodging valve 18 can be operated from the ground, and the upper opening 14 of the exhaust pipe 14
b, upper opening 16a of communication pipe 16, cutout weir 10
The height position of the cutout portion 10a, etc. is provided at a predetermined position for operational purposes. Further, 19 indicates a movable floor, and 20 indicates a clamp device that holds the weir 1.

One embodiment of the present invention has the above-described configuration, and its operation will be explained next with reference to FIGS. 3 and 4.

Now, as shown in Figure 2, if the upstream flowing water A is at the reservoir level b or slightly higher than the reservoir level b,
The upstream water A flows from the cutout weir 10 to the operating device pit 3.
The water is discharged downstream from the lower part 11a of the siphon pipe 11 into which it has flowed. When the weir 1 is in the upright state, the stop valve 6 and the operation chamber lodging valve 7 are closed, and the switching valve 13 and the manual lodging valve 18 are open.

When the flow of water on the upstream side increases from the state shown in Fig. 2 and reaches the lodging water level a, the manual lodging valve 18
More water flows into the lodging/erecting water level detection tube 17. Then, the siphon tube 11
The water level in the operating device pit 3 decreases. At this time, the water level in the exhaust pipe 14 also decreases, and the compressed air in the weir 1 flows through the air pipe 8 and the switching valve 1.
3. It is discharged through the exhaust pipe 14, and the weir 1 automatically collapses (see Fig. 3).

In this case, the stop valve 6 and the manual lodging valve 18
Even if the operation chamber is closed and the collapse valve 7 is opened, the weir 1 will collapse. Although this is an artificial collapse,
Water level relations, etc. are the same as in the case of automatic lodging. However, even in this case, overflow from the lower part 11a is necessary.

When the weir is collapsed and the upstream water level begins to fall, air flows through the opening of the exhaust pipe, and the manual overturning valve at the bottom of the overturning/erecting water level detecting tube receives the outside water level, as shown in Figure 3. Water is balanced at height. When the upstream water level decreases and the upstream water level reaches the standing water level c, air enters the right pipe from this part, the balance between the left and right water is broken, and the water in the lying/standing water level detection pipe is discharged into the siphon pipe 11. be done. As a result, air enters the siphon tube 11 and the siphon action is broken. Further, the water in the water sealing pipe 15 also falls, sealing the inside of the exhaust pipe 14. Note that if the diameter of the falling/standing water level detection tube is large, the water may not be completely discharged, but it can be evaporated by passing a large amount of air. In this state, the stop valve 6 is opened and air is forcedly sent from the blower 5 to the weir 1. At this time, the switching valve 13 and the manual lodging valve 18 are open, and the operating chamber lodging valve 7 is closed. Therefore, the air from the blower 5 does not go to the exhaust pipe 14, but is forcedly sent to the weir 1 through the air supply pipe 8. Furthermore, since the opening end 12a of the surplus air exhaust pipe 12 is located slightly higher than the branch portion 14a of the exhaust pipe 14, the excess air is discharged from the opening end 12a. When the weir 1 is erected, the stop valve 6 is closed to stop the air being pumped (see Fig. 4).

According to the present invention as described above, it is not necessary to install a water conduit for water level detection in the operation room,
As a result, a significant reduction in civil engineering costs has been achieved, and it is also possible to lower the weir while looking at the weir on the embankment, and it is also possible to lower the weir in the operation room, making operation easier and more convenient. Furthermore, if the weir is below the rising water level, the weir can be erected by pumping air, eliminating the need for a lodging mechanism and resetting surplus air pressure, and since no valve is used during automatic lodging, mechanical It is possible to provide a weir hoisting device that has many effects, such as being able to reliably lodge the weir without causing conditions such as inability to lodge due to rust or the like, which is the case with other lodging devices.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Fig. 1 is a schematic diagram thereof, Fig. 2 is a detailed diagram thereof, Fig. 3 is a detailed diagram for explaining the lodging process, and Fig. 4 is a detailed diagram for explaining the raising process. It is a detailed diagram for explanation. 1... bag-shaped weir, 3... operating device pit, 5... blower, 6... stop valve, 7... operating chamber lodging valve,
8...Air supply pipe, 10...Cut weir, 11...Siphon pipe, 11a...Lower section, 12...Surplus air exhaust pipe, 1
3...Switching valve, 14...Exhaust pipe, 15...Water sealing pipe,
16... Communication pipe, 17... Lodging/erecting water level detection pipe, 1
8...Manual lodging valve.

Claims (1)

[Claims] 1. A bag-shaped weir made of flexible material is installed across the river, and a lodging valve in the operation room is connected to the weir via a stop valve to a blower installed on the side bank, and communicates with the atmosphere. An operating device pit is provided on the side of the weir, which communicates with the upstream flowing water through a cut-out weir and with the downstream flowing water through a two-stage siphon pipe, The end of the surplus air exhaust pipe that communicates with the air supply pipe via a switching valve is opened into the water at a height below the river bed, and the exhaust pipe that communicates with the surplus air exhaust pipe above the water surface reaches near the river bed. The lower end of the exhaust pipe is bent into a U-shape and extends upward again to open into the water in the operating device pit, and the lower end of this exhaust pipe communicates with the lower end of the water sealing pipe located near the water surface. The upper part of the water sealing pipe is connected to the top of the upper siphon, and the communication pipe branched from the water sealing pipe extends downward and then upward again to open into the water in the operating device pit. It communicates with the middle part of the detection tube, and from the middle part of the falling/standing water level detection tube, one side extends upward, reverses at the falling water level, and extends downward, so as to communicate with the water below the storage level in the vertical part on the upstream side of the siphon. The other side extends downward from the middle part, and is reversed at the height of the standing water level and extends upward;
A levitation device for a weir, characterized in that a manual lodging valve is installed and the weir is opened at the height of the lodging water level.