JPH0340165B2 - - Google Patents

Description

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

Conventionally, this type of weir undulation device includes a bucket type and a float type. However, both the bucket type and the float type have the problem of introducing river water into the operation room, which requires civil engineering work on the lower part of the float room, which increases construction costs. Furthermore, when standing up, the bucket, float, and standing control device must also be reset to stand-up preparation, which is complicated. In addition, since the lodging mechanism has mechanical operation,
There was a danger that it would not collapse due to rust etc.

The present invention has been made in view of the above-mentioned problems, and aims to simplify civil engineering work and significantly reduce costs by eliminating the need to install an introduction pipe for water level detection in the operation room. , when raising the weir, the raising operation is simplified by eliminating the need for a lodging mechanism and surplus air pressure reset, and the weir also eliminates the need for a mechanical weir lodging mechanism to prevent malfunctions due to rust, etc. The object of the present invention is to provide a levitation device.

To achieve this objective, the structure of the weir undulation device of the present invention includes a blower that pumps air through an air pipe having a check valve and a manual lodging valve to a bag-shaped weir made of a flexible material. , an operating device pit which communicates with the upstream flowing water through a notched weir, and communicates with the upstream flowing water via a siphon pipe and a siphon breaker, and an operating device pit which extends downward inside the notched weir and has an open end. and a surplus air exhaust pipe communicating with the air supply pipe via a valve, and an exhaust pipe communicating with the surplus air exhaust pipe having a lower portion extending into the operating device pit and forming a U-shape. and a water sealing pipe having a lower part communicating with the lower end of the exhaust pipe, an upper part communicating with the negative pressure pipe communicating with the siphon pipe, and a lower part having a U-shaped communication pipe. It is characterized by the following.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In Figures 1 and 2, 1 is a bag-shaped weir made of flexible material, 2 is an operation shed, and 3 is a slope 4.
This is the operating device pit attached to the Reference numeral 5 denotes a blower that forcefully sends air to the weir 1 via an air pipe 8 having a check valve 6 and a manual collapse valve 7;
9 is a driving source for the blower 5. Here, a blower 5, a check valve 6, a manual collapse valve 7, a drive source 9
is installed in the operation shed 2. The operating device pit 3 communicates with the upstream flowing water A through a cut weir 10 and with the upstream flowing water B through a siphon pipe 11 and a siphon breaker 18, respectively. 12 extends downward within the weir 10 and has an open tip 12a, and the upper part is the valve 1.
A surplus air exhaust pipe 14 communicates with the air supply pipe 8 via 3, and an exhaust pipe 14 communicates with the surplus air exhaust pipe 12 and extends downward inside the operating device pit 3, and whose lower part is U-shaped. It's a tube. The branch portion 14a of this exhaust pipe 14 is located slightly lower than the tip portion 12a. 15 has a lower part communicating with the lower end of the exhaust pipe 14 and an upper part communicating with the siphon pipe 1.
1 is a water-sealing pipe having a communication pipe 17 which is connected to a negative pressure pipe 16 connected to the siphon pipe 16 and whose lower part is formed into a U-shape. It is an on-breaker. Note that the opening 14b of the exhaust pipe 14, the communication pipe 1
The opening end 17a of the weir 7, the notch 10a of the notch weir 10, etc. are provided at a predetermined height position from the viewpoint of operation.
In addition, 19 indicates the riverbed, 20 indicates a clamp device that holds the weir 1, and a indicates the undulating water level;
b indicates the storage water level, and c indicates the standing water level.

Next, the operation will be explained using FIGS. 3 to 10.

FIG. 3 shows the state of water flow during water storage, with the check valve 6 and manual collapse valve 7 closed, and the valve 13 open. When the weir 1 is to be manually lowered during water storage, if the manual lowering valve 7 is opened from the above state, the air within the weir 1 is discharged under natural pressure, and the weir 1 is raised and lowered.

When the water level in FIG. 3 reaches the collapsed water level a as shown in FIG. 4, overflow occurs from the siphon tube 11, and the air in the siphon tube 11 is discharged in the form of bubbles. At this time, air is supplied to the siphon tube 11 through the siphon breaker 18.

As shown in FIG. 5, when the siphon breaker 18 is cut off from the atmosphere, the siphon action of the siphon pipe 11 causes the water in the operating device pit 3 to be discharged to the downstream side at a low water level.

When the water in the operating device pit 3 is discharged, the opening 14b of the exhaust pipe 14 communicates with the atmosphere, and when the water in the exhaust pipe 14 is discharged by the siphon action of the communication pipe 17, the exhaust pipe 14 The air pressure inside the weir 1 is greater than the water pressure in the weir 1, and the air pressure inside the weir 1 is
The air inside is exhausted. That is, the weir 1 automatically collapses (see FIG. 6).

Then, as shown in FIG. 7, when all the air in the weir 1 is discharged and the water on the upstream side is allowed to flow downstream, the standing water level becomes c as shown in FIG. 8. Then, the siphon breaker 18 communicates with the atmosphere, the siphon action by the siphon pipe 11 is stopped, and at the same time, the water in the water sealing pipe 15 falls to seal the exhaust pipe 14.

Then, when the manual lodging valve 7 is fully closed and the check valve 6 is fully opened to operate the blower 5, air is forced into the weir 1 through the air pipe 8, and the weir 1 is erected (Fig. 9). reference). After the weir 1 is fully erected, the check valve 6 is fully closed and the operation of the blower 5 is stopped.
After that, the water level returns to the water level shown in Figure 3.

In addition, although FIG. 10 is a hydrograph according to the present invention, Q on the vertical axis indicates flow rate, and T on the horizontal axis indicates time. In addition, E indicates the maximum flow rate, F indicates the lodging flow rate, and G indicates the upright flow rate.
X represents water storage time, Y represents complete lodging time, and Z represents standing and water storage time, respectively.

According to the present invention as described above, the operation of raising and lowering is easy and there is no malfunction, the preparation for raising can be performed automatically, and there is no mechanical operation, so there is no malfunction due to rust etc., and the structure is It is possible to provide an all-pneumatic weir lodging device that is simple and requires low civil engineering work costs, and which has many effects, such as being able to be installed on slopes.

[Brief explanation of drawings]

The figures show one embodiment of the present invention. Figure 1 is a schematic diagram showing the installed state of the device, Figure 2 is a detailed diagram of the device, and Figure 3 is a detailed diagram showing the state when water is stored. , FIG. 4 is a detailed diagram showing the state during lodging, FIG. 5 is a detailed diagram for explaining the action during automatic lodging, FIG. 6 is a detailed diagram for explaining the action during automatic lodging, and FIG. Figure 7 is a detailed diagram showing the state when completely collapsed, Figure 8 is a detailed diagram showing the state when the water level is upright, Figure 9 is a detailed diagram to explain the action when standing up, and Figure 10 is the flow rate and time. This is a hydrograph showing the relationship between 1... Weir, 3... Operating device pit, 5... Blower, 6... Check valve, 7... Manual lodging valve,
8... Air supply pipe, 10... Notch weir, 11... Siphon pipe, 12... Excess air exhaust pipe, 13... Valve, 14... Exhaust pipe, 15... Water sealing pipe, 16...
Negative pressure pipe, 17...Communication pipe, 18...Siph-on breaker.

Claims (1)

[Claims] 1. A blower that pumps air to a bag-shaped weir made of flexible material through an air pipe equipped with a check valve and a manual collapse valve, and a blower that pumps air through a weir on the upstream side and a weir on the downstream side. An operating device pit is connected to the running water via a siphon pipe and a siphon breaker, and an excess air exhaust is connected to the air supply pipe via a valve, which extends downward into the interior of the weir and has an open end. a pipe, a U-shaped exhaust pipe whose lower part communicates with the surplus air exhaust pipe and extends into the operating device pit, and whose lower part communicates with the lower end of the exhaust pipe, and an upper portion communicating with a negative pressure pipe communicating with the siphon pipe;
Moreover, the weir undulation device is characterized in that it consists of a water sealing pipe having a communicating pipe whose lower part is U-shaped.