JP2009041190A - Tilting weir - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tilting weir which enables the discharge of water stored on the upstream side of a waterway by a weir board, by tilting the vertically-turnable weir board provided in the waterway, when the rising of the waterway is caused because a water level becomes as high as/higher than a predetermined one, and which ensures the tilting/rising motion of the weir board. <P>SOLUTION: The weir board is provided with a water tank, the upper portion of which has an opening and which allows the inflow and storage of the water in the waterway in a rising state. The weir board is also provided with an openable/closable lid for covering the opening of the water tank, a locking member for locking the lid so that the lid cannot be opened in the rising state of the weir board, and an unlocking member for making the lid opened by releasing the locking of the lid by the locking member when the weir board is sufficiently tilted. Preferably, the opening of the water tank is provided with a filter for preventing the inflow of foreign matter. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a tipping weir that allows a weir plate provided in a waterway to be overturned as necessary so that the water stored in the waterway can be discharged when water is increased.

  An end portion of a wire wound around a pulley of the hoisting device, comprising: a base plate pivotally attached to the bottom of the water channel; and a vertically movable weir plate; and a hoisting device installed on the bank. Is connected to the upper part of the dam plate, and the dam plate is always suspended by the wire and supported in an upright state to store water upstream, and when the water channel increases due to heavy rain, the wire is drawn out from the pulley. Therefore, a tipping weir has been put into practical use in which the weir plate is turned over by water pressure or its own weight and the stored water is discharged.

  The tipping weir that has been widely installed in the past is inconvenient to manage and requires a lot of labor because the administrator must manually lift the weir plate up again when the water level drops sufficiently due to discharge. It was. To improve this, it is conceivable to apply a force to raise the weir plate by a spring, weight, etc., and to automatically stand up when the upstream water pressure drops below a certain value due to discharge. However, when applying a force in the standing direction to the weir plate by a weight or the like, if the dead weight of the weir plate is too small, there is a risk that the overturn will not be performed reliably, and conversely if the own weight of the weir plate is too large, it will fall over There arises a problem that it becomes difficult to raise the weir plate.

  As the overturn weir that can solve such problems and can reliably perform the overturn at the time of water increase and the standing after the water level is lowered, those shown in the following Patent Documents 1 to 3 are known.

Japanese Patent Publication No. 7-76445 Japanese Patent Publication No. 7-18144 JP 2001-131945 A

  The overturning weir described in Patent Document 1 is provided with a water storage chamber into which the water of the waterway flows in at the side of the waterway, and detects the water level of the water storage chamber so that the overturning weir falls over and stands up. Is. Further, the overturning weir described in Patent Document 2 is provided with a water tank in the overturning weir, provided with a water inlet at the upper part of the water tank, and provided with an outlet having a smaller diameter than the water inlet at the lower part. ing. This overturning weir uses the weight of water stored in the water tank as a load for overturning, and at the time of overturning, the water is discharged from the small discharge port to empty the tank, thereby reducing the weight of the weir plate However, since the water in the tank flows out little by little, there is a problem that it takes time to erect the dam plate again.

  Furthermore, the overturning weir described in the above-mentioned Patent Document 3 is a device in which the shape of the water tank provided on the weir plate is devised so that water is discharged at a time during the overturning. Since it flows out, there is a problem that the load for overturning is small, and there is some anxiety in overturning the weir plate reliably and quickly. This type of waterway is generally used for agricultural water, etc. by taking the water blocked by the dam plate. It is desirable to start standing up again. Also, in small waterways, the weir plate often falls due to temporary water increase due to sunset, etc. In such a case, once the water increased due to the fall of the weir plate is discharged, the weir plate is raised again Since there is no risk of flooding, it is preferable to be able to stand up quickly. However, the conventional tipping weir has not yet been fully satisfactory in that the weir plate can be quickly and reliably toppled and raised.

  Furthermore, if a water tank into which water from the water channel flows is provided in this type of overturning weir, foreign matter such as wood fragments, leaves, grass, and household tools from the upstream flows into the water tank and accumulates inside the water tank. As a result, the resistance weight at the time of standing up the weir plate is increased, and there is a risk of hindering quick standing up operation at the time of standing up the weir plate.

  Therefore, the present invention improves the water tank provided on the dam plate of the above-mentioned overturning weir, and can surely overturn the weir plate. The challenge is to enable quick re-standing. Another problem is to be able to prevent the inflow of foreign matter into the water tank.

  In order to solve the above problems, the present invention has the following configuration. That is, the overturning weir according to the present invention includes an upright and overturnable weir plate whose base is pivotally attached to the bottom of the water channel, and a hoisting device installed on the dike, and is brought upright by the hoisting device. The supported weir plate is toppled by a rise of water level above a certain level, and when the water level of the water channel has fallen to a predetermined standing water level due to the fall, the hoisting device is operated to rise again In the overturning weir, the weir plate has an opening in the upper part, a water tank is provided in which water in the water channel flows in and is stored in an upright state, and an openable / closable lid that covers the water tank opening, and a weir plate And a lock member that locks the lid so that it does not open in the standing state, and a lock release member that unlocks the lock member and opens the lid when the barrier plate falls down sufficiently. Yes.

  As the lock release member, it is practical to provide a release member that contacts the cradle for receiving the bottom surface of the water channel or the fallen dam plate at the time of the fall and operates the lock member in the opening direction. In addition, in order to store water in the water tank, it is preferable to provide a small area inlet provided with a shutter that restricts the outflow of water inside the water tank lid while the water in the water channel flows into the lid. Furthermore, if a filter is provided at the opening of the water tank to prevent foreign matter from flowing into the water tank in the standing state of the dam plate, the foreign matter is accumulated in the water tank and becomes a resistance load at the time of standing. This can be prevented.

  The overturning weir according to the present invention is provided with a lid that covers the opening provided in the upper part of the water tank, and the lid is kept closed during the overturning operation from the standing state, and is opened when the weir plate falls down Since the member is provided, the internal water does not flow out until the dam plate sufficiently falls, and the weight of the dam plate is kept large, so that it can be reliably turned over. Further, when the dam plate falls down, the lock member is released in the opening direction and the lid of the water tank is opened, so that the water stored inside flows out at a stretch, and the weight of the dam plate is quickly reduced. For this reason, the overturning / standing operation of the weir plate is performed quickly.

  In addition, if a filter that prevents the inflow of foreign matter is provided at the opening of the weir plate, foreign matter that flows from the upstream will not flow into the water tank when the water is stored while the weir plate is standing up. The internal volume is maintained at a predetermined size, and the resistance weight at the time of standing by the foreign matter is not generated, so that it is possible to prevent the dam plate from being affected by the overturning / standing operation.

  1 and the subsequent drawings show one embodiment of the present invention. This overturning weir 1 includes a weir plate 3 in which a base 3a is pivotally mounted on a bottom of a water channel 2 by a shaft 4, and on a dike. The end of the weir plate support wire 7 wound around the pulley 6 of the hoisting device 5 is connected to the mounting piece 8 fixed to the upper end portion of the weir plate 3. ing. At the bottom of the downstream water channel, a receiving base 9 that receives and supports the overturned barrier plate 3 and a lock release member are provided.

  The hoisting device 5 has a plurality of rotating shafts, gears, and other components housed in the outer box 20, and has a function of raising the dam plate that has fallen over and is standing up. The function of holding in the state and the function of releasing the holding of the dam plate 3 and overturning the dam plate when the water level of the water channel rises above a predetermined level are provided. As this type of hoisting device 5, for example, known devices described in Patent Document 1, Patent Document 2, and the like can be used. The hoisting device may be a device that automatically raises the weir plate when the water level detected by the water level detecting means falls below a predetermined level. In addition, it is possible to use a device that winds up the weir plate by human power.

  As shown in FIGS. 1 and 2, the dam plate 3 is provided with a base frame 12 at an upper edge portion, and a drainer 11 is fixed to the center portion thereof. A hollow container-shaped water tank 15 is provided on the back side (downstream side) of the skin plate 10. Rubber seals that are in close contact with the inner wall of the water channel 2 and prevent water leakage are provided on both side portions of the weir plate. Further, a pair of left and right support members 58 are provided on the outer surface of the water tank 15 so as to be in contact with and supported by the cradle 9 when the dam plate falls down. As shown in FIG. 3, the water tank 15 is formed as a square tank having an opening 16 that opens upward in a state where the dam plate stands up. The back plate 17 serving as a bottom plate when the dam plate falls is opened when the dam plate falls. Inclined so that the side is lower. For this reason, as for the cross-sectional area of the hollow part of the water tank 15, the upper direction at the time of standing is gradually increased. The peripheral edge of the opening 16 is formed so as to be substantially horizontal when standing.

  As shown in FIG. 6, a lid 50 that closes the opening 16 of the water tank 15 is provided above the water tank 15. The base of the lid 50 is attached to the base frame of the dam plate by a shaft 51 and is rotatable around the shaft 51 in a hinged manner. In the vicinity of the downstream end of the upper surface of the lid 50, a locking bar 53 that protrudes slightly to the left and right sides is fixed.

  Furthermore, in the middle part of the lid 50, an inflow port 52 through which the water exceeding the weir plate flows into the water tank is provided. In the illustrated example, the inflow port 52 is formed as an elongate groove-like opening having a length close to the full width of the lid, but it is only necessary that the flowing water can flow into the water tank 15, so that the opening of another shape is used. Needless to say. The inflow port 52 is provided with a shutter 55. The shutter 55 is attached to the upstream edge of the inflow port 52 by a shaft 54 and is biased by a spring 56 so as to open from the upper side to the inside of the water tank 15 but not in the reverse direction. . For this reason, when the water over the barrier plate 15 falls, the shutter 55 opens downward and the water flows into the water tank 15, but the shutter 55 is kept closed by the pressure of the internal water when it falls. And the outflow of water inside is prevented.

  On the other hand, on the left and right sides of the water tank 15, as shown in FIG. 3, a lock member 60 that is rotatably supported by a shaft 57 that protrudes to the side is provided. The lock member 60 is formed with a hook portion 61 at the free end, and is biased in the direction of the arrow in FIG. 3 by the tension of the coil spring 58. Therefore, the lock member 60 is normally engaged with the bar 53 of the lid 50. Then, the lid 50 is locked so as not to open.

  At the bottom of the water channel 2, there is provided a rod-shaped unlocking member (trigger) 62 with which the locking member 60 comes into contact when the dam plate 15 falls down. When the lock member 60 comes into contact with the lock release member 6 due to the falling of the barrier plate 15, the lock member 60 rotates upward against the tension of the coil spring 58 so that the hook portion 61 is detached from the bar 53. It has become. When the hook part 61 is detached from the bar 53 of the lid 50, the lid 50 is opened by the pressure of the water in the water tank, and the water inside flows out.

  A filter 70 is provided on the upper side of the lid 50 in the standing state of the dam plate 15. The filter 70 is attached to the base frame 12 by a shaft 71 and is rotatable up and down like the lid 50. The filter 70 is for preventing foreign matters such as wood pieces and grass flowing from the upstream from flowing into the water tank 15, and allows water to pass up and down, but prevents these foreign matters from passing therethrough. The filter 70 in the illustrated example is a metal net, but may be a lattice or a blind. Reference numeral 75 in the drawing denotes a support member that restricts the downward rotation of the filter 70 so as not to interfere when the lid 50 is opened.

  Next, the operation of the overturning weir 1 will be described. First, in the standing state of the dam plate 3, the dam plate is suspended from the hoisting device 5 by the wire 7 and is held in a slightly inclined state (may be an upright state). In this state, water is accumulated on the upstream side of the weir plate 3, and surplus water flows over the weir plate and flows downstream. Part of this water flows into the water tank 15 from the inlet 52 provided in the lid 50 of the water tank 15 and is accumulated. The water stored on the upstream side of the weir plate is taken out from an intake channel (not shown) and used for agricultural water or the like.

  On the other hand, the water channel may temporarily increase due to evening or heavy rain. When the water level reaches a predetermined level due to this water increase, this is detected by a water level detecting means such as a float attached to the hoisting device 5. Then, the wire lock means (standing state holding means) of the hoisting device 5 is released. For this reason, as a result of the wire 7 being able to be paid out, the barrier plate 3 falls down downstream due to the upstream water pressure and its own weight. At this time, when a weight suspended by a wire is provided as means for applying the standing force, the weight is wound up.

  The dam plate that has fallen due to the fall is supported by the cradle 9 whose support member 58 is erected at the bottom of the water channel, and is supported in the fall state. The water stored on the upstream side of the water channel by the falling of the weir plate is discharged to the downstream side.

  The water tank 15 attached to the dam plate 3 is provided with a large opening 16 that faces the downstream side when it falls, as described above, and this opening 16 is normally closed by a lid 50 and is locked by a lock member 60. Locked. For this reason, in the process of overturning the weir plate 3, the water in the water tank 15 does not flow out and acts as a large load for overturning the weir plate 3. On the other hand, immediately before the barrier plate 3 completely falls down, the release member 62 of the lock member 60 comes into contact with the cradle 9 or the bottom of the water channel on the lower side, pushes up the lock member 60, and opens the lock member 60. Rotate in the direction. For this reason, the hook portion 61 of the lock member 60 and the bar 53 provided on the lid 50 are disengaged and the lid 50 is not restrained, so that the lid 50 opens outward and the water tank 15 Of water will flow out.

  In this case, the opening 16 is fully opened all at once, and the back plate 17 which is the bottom plate in the lying state is inclined so that the opening side is lowered, so that the water in the water tank 15 is discharged at once as the dam plate falls. As a result, the dead weight of the weir plate 3 is drastically reduced, and when the water flow on the upstream side is reduced due to water discharge, the weight can be sufficiently raised by the raising force applying means of the hoisting device. As a means for standing up the weir plate 3, a means for automatically standing up using a weight or the like may be used, or a means for standing up by an operator performing a hoisting operation. If the water tank opening 16 is always open like a conventionally known tipping weir, water is gradually discharged according to the tipping angle during the tipping process (during the tipping operation). Although gradually decreasing, in the overturning weir of the present invention, the opening 16 of the water 2 tank 15 is fully opened when the overturning is completed, so that the load for overturning is kept large, The weir plate can be reliably and quickly overturned. FIG. 7 shows a comparison of the overturning moment applied to the weir plate between the case where the opening of the water tank 15 is always open and the case where it is always closed and fully opened when the overturn is completed. is there. As can be seen from the figure, if the opening 16 remains open, the overturning moment gradually decreases. However, in the overturning weir of the present invention, the overturning moment is kept large until the weir plate completely collapses. Be drunk.

  When the water level is lowered by the falling of the weir plate 3 and the water level in the water channel is lowered to a predetermined water level (standup 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. You may make it wind up manually. 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 the original standing state, the wire lock means of the hoisting device is activated to hold the weir plate in the standing state. For this reason, water storage is started again on the upstream side of the barrier plate. When the upstream water level reaches the falling water level again due to this water storage, the weir plate falls over again and discharges water. In this way, the risk of flooding can be avoided while promptly storing water.

  As is clear from the above description, the overturning weir of the present invention is provided with a water tank for increasing the weight on the weir plate provided so as to be able to stand up and incline, and the lid of the water tank is in a standing state. The water is allowed to flow in, but the water is prevented from flowing out during the fall process, so that the fall is reliably and quickly performed by the gravity. In the illustrated example, since the opening 16 has an area equal to or greater than the cross-sectional area of the water tank 15, when the dam plate falls down, the water in the water tank is discharged at a stretch, and thus the dead weight of the dam plate is rapidly reduced. It is possible. For this reason, the standing board 3 can be quickly raised after water discharge. The shape of the water tank is not limited to the illustrated example, and other shapes such as a square tank having the same cross-sectional area from the upper part to the lower part can be adopted.

  In the illustrated example, the release member 62 for releasing the lock member 60 is provided at the bottom of the water channel so as to push up the lock member 60 when lying down. However, the release member 62 is provided integrally with the lock member 60. In this case, the lock member 60 may be rotated upward by being brought into contact with the bottom surface of the water channel or the cradle 9 to disengage the lid 50 from the bar member 53. Further, as the lock member 60, a hook-shaped member rotating around the axis is used, but not limited to this, as long as the cover 50 is held in a closed state when standing and can be opened when lying down, Other structures may be used.

  This overturning weir can be installed in a water intake channel, etc., used to block the water in the water channel and take water such as agricultural water, and can be manufactured industrially using steel or the like. Is.

It is a partial cross section side view in the standing state of one example of the falling weir concerning this invention. It is a rear view of the dam. It is a side view of the dam plate in a standing state. It is a side view of a dam in the state just before falling down. It is a perspective view showing the detail of the lid | cover of a water tank in a lying state. They are a perspective view (a) of a dam plate, and sectional drawing (b) showing the detail of an inflow port. It is a graph showing the fluctuation | variation of the torque for dam plate fall.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Falling weir 2 Water channel 3 Dam plate 4 Axis 5 Hoisting device 7 Wire 9 Receptacle 15 Water tank 16 Opening 50 Lid 52 Inlet 60 Lock member 70 Filter

Claims (4)

The base is pivotally attached to the bottom of the waterway and can be erected and tumbled freely, and the hoisting device installed on the embankment is supported by the hoisting device in a standing state. In the overturning weir configured to operate the hoisting device again when the water level of the water channel is lowered to a predetermined standing water level due to the overturning, the top of the weir plate is Provided with a water tank in which water in the water channel flows in and is stored in an upright state, and an openable / closable cover that covers the opening of the water tank, and the lid does not open in the upright state of the dam plate An overturning weir comprising: a locking member that locks to the inside; and an unlocking member that unlocks the locking member and opens the lid when the weir plate is sufficiently overturned. 2. The overturning weir according to claim 1, wherein a member that abuts against the lock member and operates the lock member in the opening direction at the bottom of the water channel is provided as the unlocking member. The overturning weir according to claim 1 or 2, further comprising an inflow port having a small area provided with a shutter that restricts the outflow of water inside the water tank, while water in the water channel flows into the lid of the water tank. The overturning weir according to any one of claims 1 to 3, wherein a filter for preventing foreign matter from flowing into the water tank in a standing state of the weir plate is provided at an opening of the water tank.

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