JP2001131945A - Overturning weir - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly re-raise a sheathing board in an overturning weir for overturning the sheathing board provided in a channel to discharge the water stored in the channel. SOLUTION: This overturning weir comprises the collapsible sheathing board having a base part pivotally fixed to the bottom of the channel and a hoist gear set on an embankment, so that the sheathing board supported in a standing state by the hoist gear can be overturned by a fixed rise or more of the level of the channel, and also raised again by the operation of the hoist gear when the level of the channel is lowered to a prescribed standing level by the overturning. A water tank for running the water of the channel is provided on the sheathing board, and an upward opening having an area equal to and larger than the cross sectional area of the water tank is formed on the water tank. The inner wall surface forming the bottom plate of the water tank in the overturning of the sheathing plate is preferably formed as an inclined surface lowered toward the opening.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overturning weir in which a weir plate provided in a waterway can be turned over as required to discharge water stored in the waterway.

[0002]

2. Description of the Related Art A rotatable weir plate whose base is pivotally attached to the bottom of a waterway, and a hoisting device installed on a dike, a wire wound on a pulley of the hoisting device. End is connected to the upper part of the weir plate, and the weir plate is always suspended by the wire and supported in an upright state to store water on the upstream side. An overturning weir has been put to practical use in which the weir is turned over by water pressure or the own weight of the weir plate to release the stored water.

[0003]

The overturning weirs which have been widely installed in the past are inconvenient to manage because the administrator must manually raise the weir plate again and raise it when the water level is sufficiently lowered by the discharge. At the same time, a lot of labor was required. As a measure to improve this, it is conceivable to apply a force for raising the weir plate by a spring, a weight, or the like, and to automatically raise the water when the pressure of the water on the upstream side drops below a certain value due to discharge. However, when applying force in the upright direction to the weir plate by the weight or the like, there is a risk that if the self-weight of the weir plate is too small, overturning may not be performed reliably. Conversely, if the own weight of the weir plate is too large, it will overturn. There is a problem that it is difficult to raise the weir plate.

In order to solve such a problem, the present inventor has developed a falling weir which can surely fall over when the water level rises and stand up after the water level drops (Japanese Patent Publication No. 7-7644).
No. 5). Further, in order to more surely turn over the weir plate of this kind of weir, we have also developed a dam unit in which a water tank is integrally provided on the back surface of the weir plate (Japanese Patent Publication No. Hei 7-1995).
No. 18144).

The water tank described in Japanese Patent Publication No. Hei 7-18144 is provided with a water inlet at the upper part and a discharge port with a smaller diameter than the water inlet at the lower part. Since the tank is emptied by draining water from the discharge port to reduce the weight of the weir plate, the outflow of water in the tank is performed little by little, and it takes time to erect the weir plate again. There was a point.

[0006] This type of water channel is generally used to take water blocked by a weir plate and use it for agricultural water and the like. It is desired that the weir plate be re-established to start storing water. In addition, in small waterways, the weir plate often falls due to temporary flooding caused by showers, etc., and in such a case, the water that had been increased due to the fall of the weir plate was once discharged, and then the weir plate was raised again. There is no danger of flooding,
Preferably, it can be quickly erected.

Therefore, the present invention improves the water tank provided on the weir plate of the above-mentioned weir so that the water in the water tank can be discharged at a stroke when the weir plate is overturned. The task is to be able to stand up quickly.

[0008]

In order to solve the above problems, the present invention has the following arrangement. That is, the overturning weir according to the present invention includes a standing and overturning weir plate whose base is pivotally attached to the bottom of the waterway, and a hoisting device installed on the embankment, and the uprighting state is set by the hoisting device. The supported weir plate is configured to be overturned by the rise of the water level over a certain level, and when the water level of the water channel falls to a predetermined rising water level due to the overturning, the hoisting device is operated to be raised again. The overturning weir is characterized in that a water tank into which water in a water channel flows into the weir plate is provided, and the water tank is formed with an upward opening having an area equal to or greater than a cross-sectional area of the water tank.

In this falling weir, the water on the upstream side gradually flows over the weir plate which is always in an upright state. This water flows into the water tank from the opening of the water tank provided in the weir plate, and is stored in the water tank, so that the weight of the weir plate is increased. In this state, when the water channel increases due to heavy rain or the like and reaches a predetermined water level, the weir plate is automatically turned over, and the water stored on the upstream side is discharged. In this case, since the weight of the weir plate is large, it can be surely laid down. Further, since the water tank of the weir plate of the present invention has a large opening area, the water stored in the water tank flows out at once at the time of overturning, and the weight of the weir plate is rapidly reduced.

Next, when the water level in the water channel drops to a predetermined level due to the water discharge, the hoisting device is operated, and the weir plate is erected again. In a small waterway, it is often desirable to start storing water immediately for water intake after the water is knocked down once, but in the present invention, the weight of the dam is reduced almost simultaneously with the fall, Re-starting can be performed quickly. In addition, by making the inner surface serving as the bottom plate of the water tank when the weir plate falls over, an inclined surface such that the opening side becomes low, it is possible to further promote the outflow of water inside when the fall plate falls.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 show an embodiment of the present invention. The overturning weir 1 has a base 3a at the bottom of a water channel 2. FIG.
Is provided with a weir plate 3 rotatably mounted on a shaft 4 and a hoisting device 5 installed on the embankment, and an end of a weir plate supporting wire 7 wound on a pulley 6 of the hoisting device 5. The part is connected to a mounting piece 8 fixed to the upper end of the weir plate 3. A pedestal 9 for receiving and supporting the overturned weir plate 3 is provided at the bottom of the water channel on the downstream side.

The weir plate 3 is provided with a steel pipe 12 as a base frame at an upper edge portion, and a drainer 11 is fixed to a central portion thereof. Further, a hollow container-shaped water tank 15 is provided on the back side of the skin plate 10. Rubber seals are provided on both side surfaces of the weir plate to adhere to the inner wall of the water channel 2 to prevent water leakage. The water tank 15 is formed as a rectangular tank having an opening 16 that opens upward in a standing state of the weir plate, and a back plate 17 that becomes a bottom plate when the weir plate falls is inclined so that the opening side becomes lower when the weir plate falls. ing. For this reason, the cross-sectional area of the hollow part of the water tank 15 is gradually increasing at the time of standing up. The periphery of the opening 16 is formed so as to be substantially horizontal when standing.

The hoisting device 5 has a plurality of rotating shafts, gears, and other components housed in the outer case 20. The hoisting device 5 has a function of erecting a weir plate that is overturned and standing down. Is provided in a standing state, and when the water level of the water channel rises to a predetermined level or more, the function of releasing the holding of the weir plate and turning over the weir plate is provided. As this type of hoisting device, for example, a known device described in Japanese Patent Publication No. 7-76445, Japanese Patent Publication No. 7-18144, or the like can be used.

Next, the operation of the falling weir will be described. First, in the upright state of the weir plate 3, the weir plate is hung by the hoisting device 5 by the wire 7 and is held in a state slightly inclined to the downstream side (may be an upright state). In this state, water is stored on the upstream side of the weir plate 3, and surplus water flows over the weir plate and flows downstream. The water stored on the upstream side of the weir plate is taken out from a water intake channel (not shown) and used for agricultural water and the like.

On the other hand, the water channel may be temporarily increased due to showers or heavy rain. When the water level reaches a predetermined level due to the increased water, the water level is increased by a water level detecting means such as a float provided on the hoisting device 5. The wire lock means (standing state holding means) of the hoisting device 5 is released. As a result, the wire 7 can be fed, and as a result, the weir plate 3 falls to the downstream side by the water pressure and the own weight of the upstream side. At this time, if a weight suspended by a wire is provided as a means for applying the standing force, the weight is wound up.

The weir plate that has fallen down due to overturning is received by the receiving stand 9 erected at the bottom of the water channel, and is supported in the down state. The water stored on the upstream side is discharged to the downstream side due to the fall of the weir plate. On the other hand, the water tank 15 attached to the weir plate 3 is provided with a large opening 16 directed to the downstream side when falling down, and the back plate 17 serving as the bottom plate in the fall state is inclined so that the opening side is lower. The water in the water tank is discharged at a stretch when the weir plate falls. For this reason, the self-weight of the weir plate 3 is suddenly reduced, and when the water flow on the upstream side is reduced due to water discharge, the weir plate 3 can be sufficiently raised by the raising force applying means of the hoisting device.

When the water discharge proceeds due to the fall of the weir plate 3 and the water level of the water channel is lowered to a predetermined water level (rise start water level) by the water level detecting means attached to the hoisting device 5,
The hoisting function of the hoisting device 5 operates to wind up the weir plate 3. At this time, since the weight of the weir plate 3 is light, it can be easily wound up with a small force. When the weir plate 3 is wound up to its original standing state, the wire lock means of the hoisting device operates to hold the weir plate in the upright state. Therefore, the water storage is started again on the upstream side of the weir plate. If the water level on the upstream side reaches the falling water level again due to this water storage,
The weir plate falls again and releases water. In this way, the risk of flooding can be avoided while storing water quickly.

[0018]

As is apparent from the above description, the overturning weir of the present invention is provided with a water tank for increasing the weight on a weir plate which is provided so as to be able to stand up and down. Since the opening has an area equal to or greater than the cross-sectional area of the water tank, when the weir plate lays down, the water in the water tank is discharged at a stretch, which makes it possible to rapidly reduce the weight of the weir plate. Was. Therefore, the overturning weir of the present invention can increase the weight of the weir plate at the time of overturning, and can surely and quickly fall down, and can quickly reduce the weight by the overturning, and quickly return after water is discharged. It was possible to stand up and restart water storage.

[Brief description of the drawings]

FIG. 1 is a side view of an example of an overturning weir according to the present invention.

FIG. 2 is a rear view of the weir plate.

FIG. 3 is a side view of the weir plate in an upright state.

FIG. 4 is a side view of the weir plate in a lying state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Falling weir 2 Waterway 3 Weir plate 4 Axis 5 Hoisting device 7 Wire 9 Cradle 15 Water tank 16 Opening

Claims (2)

[Claims] 1. A weir plate having a base portion pivotally attached to a bottom of a waterway and capable of standing up and down, and a hoisting device installed on a dike, the weir plate supported upright by the hoisting device. However, when the water level is raised over a certain level or more, and when the water level of the water channel drops to a predetermined rising water level due to the falling, the hoisting device is actuated and configured to be raised again, An overturning weir comprising: a water tank into which water in a water channel flows into a weir plate; and an upward opening having an area equal to or greater than a cross-sectional area of the water tank is formed in the water tank. 2. The overturning weir according to claim 1, wherein the inner wall surface of the water tank serving as the bottom plate of the water tank in the overturning state of the weir plate is formed as an inclined surface such that the opening side is lowered.