JP2000144695A - Overturning gate device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an overturning gate device capable of instantaneously detecting the situation that water is increased in a river and overflows an intake weir and prostrating an overturning gate quickly and reliably to open a discharge channel. SOLUTION: An overturning plate 2 is erectably and prostratably provided at the top end of an intake weir 1, and an overturning gate main body 4 is erectably and prostratably provided in the recessed channel 3 of the intake weir 1. An erecting/prostrating rope 6 erecting/prostrating the overturning gate main body 4 and a holding rope 7 erectly holding the overturning gate main body 4 are connected to the overturning gate main body 4. A box 8 fitted with the terminal of the holding rope 7 is slidably fitted to the case 9 of the overturning plate 2 so that the box 8 can be released from the case 9 when the overturning plate 2 is prostrated. When the box 8 is released, the tension of the holding rope 7 is released, and the overturning gate main body 4 is prostrated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overturn gate provided on an intake weir of a river, and more particularly, a downfall plate provided separately from the overturn gate body to detect rising water in the river and to overturn the overturn gate body. The present invention relates to a fall gate device as described above.

[0002]

2. Description of the Related Art Conventionally, as a method of taking agricultural water from a river, there is a method by a head work. In this method, an intake weir is installed in a river in order to secure an intake level, and water that has been raised is taken in from a water intake via a water channel. The equipment of this head work is generally composed of management facilities such as intake facilities, intake weirs and sand basins, incidental facilities such as tailraces, operation facilities, and power distribution facilities. The scale of the head works differs not only with the size, shape, and amount of water of the river, but also with the amount of water taken and the method of water intake. Particularly, small and medium sized head works do not always have all of the above facilities. Some are as simple as simply adding an intake or irrigation channel to an intake weir.

[0003] The headworker secures agricultural water from the river from the point of water use, and from the point of flood control, installs a gate in the discharge channel of the intake weir so that the river can safely flow down during floods. By opening and closing this, the amount of water can be adjusted. Therefore, performing the opening and closing of the gate properly at the required time greatly affects the function of the headwork. As such a gate device, there are a type in which the door body is opened and closed and a type in which the door body is rotated, and the gate body is opened and closed using human power or electric power as power.

[0004] In particular, there are shallow rivers in which debris flows are likely to occur during a typhoon or flood in mountainous areas. In a relatively small head work in such a river, when a natural disaster such as debris flow occurs upstream, gravel and driftwood flow into the intake weir together with running water, and the entire weir reaches the top. As a result, the flowing water flows over the intake weir, making it impossible to store water.In addition, the intake port provided upstream of the intake weir and the irrigation canal following it are similarly buried, making it impossible to store water. was there.

[0005] For this reason, debris flows are generated, and sand and gravel flow into the intake weir together with the running water, and the gate falls down in time for the running water to start flowing over the top end of the intake weir, and gravel and the like accumulated in the intake weir. If the water is discharged from the spillway together with the water flowing down violently, the intake weir can be prevented from being buried. In other words, it is an important function of the gate device to ensure that the gate falls down at the appropriate time and securely. Not only is it costly and time-consuming to remove, but it also causes river pollution during the removal operation.

However, in the case of small-scale head works, the gate is often opened and closed manually, and when the time to fall down is midnight or during a storm or flood, the time is missed. An inconvenient situation has occurred. Therefore,
In order to prevent such a situation, various devices have been developed that detect the timing of the gate falling due to the rising water in the river and automatically fall the gate. For example, there is an apparatus that detects the time of lodging using the ups and downs of a float caused by a change in water level of a river or the like.

[0007]

However, the apparatus of the float type has the following disadvantages. (1) The configuration of the device is complicated, and particularly in the case of a precise mechanism, the device may not be able to operate due to rusting of a mechanical portion or sticking of lubricating oil. (2) Floats may enter the vessel containing the float, or sand and gravel may accumulate, causing the vessel to become inoperable. (3) When the movement of the float changes gradually, the signal transmission force from the float to the gate opening / closing means may be weakened, and the responsiveness may be reduced to disable the operation. (4) A water conduit may be provided as a means for taking water into the container containing the float. In this case, when a debris flow occurs, gravel or driftwood flows into the headrace channel and is buried, making it impossible to detect a rise in water. The present invention is to solve the conventional problems as described above, and when the river becomes flooded and overflows the top of the intake weir, this is immediately sensed as a water pressure signal, It is an object of the present invention to provide a fall gate device that can quickly and surely fall down a gate.

[0008]

Therefore, according to the present invention, there is provided an overturning gate device in which an overturning gate body is installed so as to be able to rise and fall in a water discharge channel of an intake weir so as to be able to stand up and down separately from the overturning gate body. A falling plate that falls down upon receiving a set water pressure, a rope locking means detachably provided on the falling plate, a holding rope connected between the rope locking means and the falling gate body, and one end. And an up-and-down rope connected to the fall gate main body and extending to the riverbank side of the intake weir, so that the rope locking means is detached from the fall plate with the fall operation of the fall plate. It is characterized by having done.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The basic structure of the present invention is that a fall gate main body is provided in a cut-out portion of a section which is a water discharge channel of an intake weir, and a spindle attached to a door body of the fall gate main body. A constant-axis rotating fall gate device that opens and closes by rotating the door body around the center is adopted. That is, the falling gate body of the present invention is provided so as to be able to undulate in a cut-out groove or a recessed water channel in which a part of the intake weir is cut out, and on the upper side of the falling gate body, an up-and-down rope for raising and lowering the falling gate body. ,
The falling gate body is connected to a holding rope for holding the body in an upright state. The terminal of the undulating rope is extended to the riverbank side so that it can be pulled by a winch or the like. Also, the end of the holding rope is connected to the rope locking means. The rope locking means is provided so as to be fixed and detachable from a storage and holding portion (the case 9 in this embodiment) formed on the falling plate, so that the fixing of the rope locking means is released by the falling operation of the falling plate. I do.

After the rope locking means is fixedly set on the falling plate, the terminal of the undulating rope connected to the falling gate body is previously released. In this setting state, for example, it is assumed that the falling plate starts the falling operation by receiving a high water pressure due to the increase of the river. Then, when the falling plate is inclined at a predetermined angle, the rope locking means is detached from the falling plate. When the rope locking means is detached from the falling plate, the tension of the holding rope, that is, the holding force for holding the falling gate body in the upright state, is lost, so that the falling gate body falls down by water pressure, and the water discharge channel is opened. Is done. The fall-down gate body can be returned to the upright state by pulling the terminal of the up-and-down rope with a winch or the like. As described above, in the apparatus of the present invention, the holding rope for holding the upright gate body in the upright state is connected to the rope locking means, and the rope locking means is detachably connected to the falling plate. The rope locking means is connected and set in the standing state of the falling plate, and when the falling plate moves down with the water pressure flowing over the intake weir, the rope locking means is released to loosen the tension of the holding rope, thereby The fall gate body is reliably opened.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. The schematic configuration of the present embodiment is, as shown in FIG.
A concrete intake weir 1 for stopping water in a river, a falling plate 2 provided on a top end surface of the intake weir 1, and a concave waterway which is a water discharge canal provided in the intake weir 1 and inclined in a flowing direction. (Notch portion) 3 includes a fall gate body 4 provided in the notch 3, an up / down rope 6 for raising / lowering the fall gate body 4, and a holding rope 7 for holding the fall gate body 4 in an upright state. The terminal of the holding rope 7 is connected to the box 8,
The box 8 is slidably housed in a case 9 fixed to the falling plate 2. The arrow W indicates the direction of the water flow flowing from the upstream side of the intake weir 1 to the downstream side.

The fall gate body 4 has a door 10 which receives pressure from the water flow of the river, and the lower end of the door 10 is
It is attached to the bottom of the concave channel 3 so as to be able to undulate by means of 1 and 12. Closing and opening of the recessed water channel 3 is the falling gate body 4
The rotation is performed in the rising direction and the falling direction. A shock absorber 13 is mounted between the rear surface side of the door body 10 (on the front side in FIG. 1) and the recessed water channel 3 in order to reduce an impact at the time of falling down. With this shock absorber 13, the door body 10 does not fall down instantaneously even if it receives a large water pressure, so that the door body 10 can be prevented from being damaged.

One end of a holding rope 7 for holding the fall gate body 4 in an upright state is connected to an upper end of the door body 10. The other end of the undulating rope 6 is connected to the guide sheaves 14, 1
It extends to the river bank side of the intake weir 1 via 5, 16 and 17, and is connectable to a chain block or winch (not shown) on the river bank. Therefore, in order to raise the falling gate body 4 in the falling state, the rising rope 6 may be pulled in a riverbank direction F by a winch or the like, and the falling gate body 4 may be turned to the standing state. The other end of the holding rope 7 extends toward the tipping plate 2 via the guide sheave 18 and is fixed to the box 8. Reference numeral 5 denotes a part of the top end face on the front side of the intake weir 1.

In FIGS. 1 and 2, reference numeral 19 denotes a base plate fixed to the top end surface of the intake weir 1 by a plurality of anchor bolts 20, and a column 21 is provided upright at a position corresponding to the case 9 of the base plate 19. . The overturning plate 2 is attached to the base plate 19 at a position downstream of the support column 21 by a pair of hinges 22 so as to be able to undulate. In order to make the falling plate 2 fall and stand, it may be rotated in the downstream and upstream directions. A rubber cushioning member 23 is fixed to the rear side (the front side in FIG. 1) of the falling plate 2 so as to reduce the impact received from the base plate 19 when the falling plate 2 falls down. The case 9 is fixed to the lower end of the overturning plate 2, and the case 9 extends toward the column 21. The shape of the case 9 is U-shaped in cross section with the support 21 side as an opening, and a U-shaped engagement groove 24 that engages with the support 21 is formed on the lower surface of the case 9.

When a box 8 of a rectangular parallelepiped type is mounted in the case 9 and the falling plate 2 falls down about 90 degrees from the standing posture,
The two members 8 and 9 rotate in the range of about 90 degrees in the falling direction. As shown in FIG. 3, the specific structure of the box 8 is formed of a rectangular cylindrical frame 25, and the central area of the upper and lower surfaces is hollow. Inside the box 8, a pair of support shafts 26 are disposed opposite to each other in the same direction as the water flow direction W. A roller 27 is rotatably supported between the pair of support shafts 26, and is provided at both ends of the support shaft 26. A stopper 28 for preventing the falling off is fixed. An eye plate 30 having a through hole 29 is provided on the outer surface of the box 8 on the side of the fall gate body 4, and the other end of the holding rope 7 is connected to the through hole 29. Further, a gap S having a required size sufficiently larger than the diameter of the column 21 is provided between the roller 27 and the eye plate 30 side.

The box 8 is mounted on the case 9 with the falling plate 2 standing upright. The column 21 is mounted with its peripheral side surface engaged with the roller 27 surface. In this case, the box 8 is slidable relative to the case 9 in a direction orthogonal to the support shaft 26. Therefore, when the box 8 is pulled by the holding rope 7 when the falling plate 2 falls down,
The box 8 comes out of the case 9. At this time, even if the box 8 slides while rotating in the falling direction,
Since the gap S is provided, the frame 25 does not contact the support 21. The length of the holding rope 7 is set so that the fall gate body 4 stands up to a predetermined posture and is temporarily positioned and fixed. Thereby, the length of the box 8 in the longitudinal direction is set to a length that allows the case 9 to be engaged with the support 21. Therefore, if the tension of the holding rope 7 is relaxed, the movement of the box 8 becomes free.
The support column 21 can be easily positioned between the eye plate 30 and the roller 27.

In this embodiment, the following mechanism is added for setting the time when the falling plate 2 falls down. That is, as shown in FIGS. 4 and 5, a pair of brackets 31 and 32 are attached to both the upstream side of the falling plate 2 and the base plate 19 side.
34 are provided. A lead pin 37 having through holes 35 and 36 at both ends is inserted into the pin holes 33 and 34, and a single wire 38 for preventing a pin from coming off is inserted into the through holes 35 and 36, and the wire 38 Rings at both ends are key 39
Are connected.

By the way, in a river with many gravel and driftwood, gravel and driftwood are likely to be caught around the falling board 2, but a means for preventing adverse effects on the operation of the falling board 2 due to this is desired. That is, in this example, for example, as shown in FIG. 6, the case 9 and the box 8 are provided on the front side (the left side in FIG. 6) with short bent plate-like portions for protecting the members 9 and 8 along the base plate 19. A guard member 40 is attached,
Except for the moving distance L of the box 8 required for the fall gate body 4 to fall down, a plurality of anchor bolts 4 are provided at the installation positions of the ropes 6 and 7 and each guide sheave (not shown).
1 attaches a long guard member 42 having an L-shaped cross section.

Next, the operation of this embodiment will be described. As shown in FIG. 7, when the case 9 is detached from the column 21, the box 8 is attached to the inside of the case 9 by pulling the other end of the undulating rope 6. It is sufficient that the support plate 21 is positioned so that the support column 21 is inserted between the support plate 21 and the eye plate 30, and then the tipping plate 2 is rotated in the upright direction. When the other end of the up-and-down rope 6 is loosened in a state where the box 8 is mounted and set on the case 9, the fall gate body 4 is released from the tension in the upright direction and attempts to return to the fall position by its own weight and water pressure. .
Then, due to the tension of the holding rope 7, the box 8 is pulled to the holding rope side and slightly moved, and the box 8 is moved.
Is applied to the support 21 in the horizontal direction orthogonal to the roller 27. Therefore, the roller 27 is firmly pressed against the side surface of the column 21 without rotating, and is fixed in position. At this time, the overturning plate 2 is in an upright state, and is fixed in position by the pressing force of the roller 27. Therefore, unless the overturning force corresponding to the pressing force acts on the overturning plate 2, the overturning plate 2 does not start the overturning operation. .

As shown in FIG. 8, the rising of the river causes the water to flow over the top end of the intake weir 1. When the water pressure due to the water flow acts on the falling plate 2, the falling plate 2 falls on the hinge 22 as a fulcrum. Try to rotate. Further, when the river rises and the water pressure increases, and the turning force of the falling plate 2 in the falling direction exceeds the pressing force of the roller 27, the falling plate 2 starts falling. Then, the box 8 in the case 9 also rotates in the same direction as the fall of the falling plate 2, that is, in the upward direction. For this reason, the roller 27 that has been pressed against the support 21 starts rotating, and the roller 27 eventually releases the engagement with the support 21, and the box 8 moves from the case 9 to the holding rope 7 side as shown in FIG. Get out. With the box 8 pulled out, the tension of the holding rope 7 is also released. At this time,
The other end of the undulating rope 6 connected to the fall gate body 4 is
It has already been released after the box 8 has been set. Therefore, when the holding rope 7 is released, the fall gate body 4 starts to fall by the action of the rotational moment and the water pressure due to its own weight. At this time, the shock absorber 13 prevents the falling gate body 4 from suddenly falling down. For this reason, the holding rope 7 and the like are not released and greatly elastically deformed, and there is no danger of splashing a nearby person.

In order to raise the fallen gate body 4 again, first, in the case 9, the undulating rope 6 is pulled to the riverbank side by a winch or the like to a position where the roller 27 can be engaged with the support column 21. Temporarily fix the position. Next, after the falling plate 2 in the falling state shown in FIG. 9 is started upright and the box 8 is mounted in the case 9, the pulling force of the rising and falling rope 6 is relaxed by a winch or the like. Then, the holding rope 7 is tensioned by the force of the falling gate body 4 in the falling direction, and the roller 2 of the box 8 is tensioned by the tension.
7, the side surface of the support 21 is pressed, and the falling plate 2 is fixed at a predetermined standing position. When the falling plate 2 is fixed, the terminal on the riverbank side of the undulating rope 6 may be released. In this way, by ending a series of setting operations, the falling plate 2 can be kept upright to prepare for the next water increase, and at the same time, the falling gate main body 4 closes the concave water passage 3 and the water intake weir. Start the water storage of 1.

Finally, the setting of the falling time of the falling plate 2 will be supplementarily described. In FIG. 4, when the flowing water of the river hits the front surface of the falling plate 2 from the upstream side, a moment in the falling direction around the hinge 22 is generated on the falling plate 2 as described above. When the pressure received from the flowing water increases and the moment force exceeds the shearing force of the pin 37 and the pin 37 is cut, the falling plate 2 rotates in the falling direction. In this case, the falling start time of the falling plate 2 depends on the shear force of the pin 37, that is, the size (shear strength) of the pin 37. Therefore, by changing the size of the pin 37, the falling start time of the falling plate 2 can be freely changed, and malfunction is prevented and safety is improved. That is, by using the pins 37 having different sizes, it is set so that the falling plate 2 does not fall down in the event of a small-scale flood, or the falling plate 2 does not fall down easily even if a driftwood collides or a person accidentally touches it. can do.

The present invention is not limited to the above embodiment, but may be configured as follows. (1) In the above embodiment, the pressure receiving portion (door) facing the running water of the falling plate 2 is one sheet. However, as shown in FIG. 10, bolt holes 44 are provided at both ends of the main pressure receiving portion 43 of the falling plate 2. Provide multiple,
By attaching the auxiliary pressure receiving portion 45 or 46 with bolts and nuts, the pressure receiving area of the falling plate 2 with respect to the water flow may be increased, so that the operation sensitivity of the falling plate 2 can be adjusted and changed. (2) The door body 10 of the fall gate body 4 is attached to the concrete intake weir 1 by arranging the hinges 11 and 12,
If the finished surface of the watertight rubber plate and concrete on the side of the tipping gate body 4 is not accurate, it is difficult to secure watertightness, and much time is required for mounting the tipping gate body 4 and for civil engineering work. Therefore, in order to solve this, an integral frame may be prepared and attached. That is, as shown in FIG. 11, hinges 11 and 12 are attached to a three-dimensional frame 47 having a bottom plate inclined downward in the flow direction, which can be fitted into the concave waterway 3, and the hinges 11 and 12 are provided with side watertightness. Rubber 48, 4
9 and a so-called integral frame body 47 having a shock absorber 13 attached to the rear surface side while attaching the fall gate body 4 provided with the watertight rubber 50 and the bottom surface 50 (a rope guide sheave (not shown), The installation work may be performed in parallel with the civil works of the intake weir 1. In this way, not only can the watertightness of the fall gate body 4 be improved, but also the installation time can be greatly reduced. FIG. 12 shows a structural example of an integrated frame 47 having upper and lower fitting steps 51 and 52. In the above embodiment, the location of the falling plate 2 is the top end face of the weir 1. However, the falling plate 2 may be independently installed at an appropriate upstream or downstream side of the weir 1. A part of the top end surface of the weir 1 may be cut out and installed in this notch. In addition, as a matter of course, the present method can be applied to any overturn gate device of a method in which a part or the whole of the intake weir 1 is raised and lowered.

[0024]

As described above, the present invention has the following excellent effects. (1) Eliminates the need for a complicated rotating mechanism, simplifies the structure, and also enables the fall gate to directly detect the water pressure when the river rises and automatically activate the fall gate body, resulting in high responsiveness. As a result, the fall operation of the fall gate body is performed more reliably. Therefore, agricultural water can be reliably secured from the water use surface when water is withdrawn, and the running water can flow smoothly from the flood control surface during a flood. (2) Compared with known sensing devices and gate opening and closing devices,
In the present invention, since the method of opening and closing the fall gate body and the structure are simple, the construction is easy, the construction period is shortened, and a robust fall gate device can be provided at low cost. (3) The water pressure signal at the time of overflow is transmitted from the holding rope to the tipping gate body, and the tipping gate body falls down in a timely manner. No gravel is deposited. (4) After the falling plate is raised, the water storage capacity of the intake weir can be quickly restored. Therefore, it is not necessary to remove the gravel in the intake weir, and it is possible to greatly reduce river cleaning work and cleaning treatment costs.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an overall appearance of a fall gate device according to the present invention.

FIG. 2 is a perspective view of a main part showing a case portion of the overturning plate of FIG. 1;

FIG. 3 is a perspective view of a main part showing a state when the box is detached.

FIG. 4 is a main part side view showing a pin connection portion between a falling plate and a base plate.

FIG. 5 is a view taken along line VV of FIG. 4;

FIG. 6 is a perspective view of a main part showing an example of installation of a guard member.

FIG. 7 is a perspective view of a main part showing a state after the box has been moved away;

FIG. 8 is a main part side view showing a standing state of the overturning plate.

FIG. 9 is a side view of a main part showing a falling state of the fall plate.

FIG. 10 is a perspective view of a main part showing a main pressure receiving portion and an auxiliary pressure receiving portion of a fall plate.

FIG. 11 is a partially cutaway perspective view showing an overturn gate main body formed by an integral frame.

FIG. 12 is a partially cutaway perspective view showing a configuration example of an integrated frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Intake weir 2 Falling plate 3 Recessed waterway 4 Falling gate main body 5 Top end face of intake weir 6 Undulating rope 7 Holding rope 8 Box 9 Case 10 Door body 11 Hinge 12 Hinge 13 Shock absorber 14 Guide sheave 15 Guide sheave 16 Guide sheave 17 Guide Sheave 18 Guide sheave 19 Base plate 20 Anchor bolt 21 Support post 22 Hinge 23 Buffer material 24 U-shaped engagement groove 25 Frame 26 Support shaft 27 Roller 28 Stopper 29 Through hole 30 Eye plate 31 Bracket 32 Bracket 33 Pin hole 34 Pin hole 35 Through-hole 36 Through-hole 37 Pin 38 Wire for preventing pin disengagement 39 Key 40 Bent plate-shaped guard member 41 Anchor bolt 42 L-shaped guard member 43 Main pressure receiving part 44 Bolt hole 45 Auxiliary pressure receiving part 46 Auxiliary pressure receiving part 47 Frame 48 Side surface Watertight rubber 9 aspect watertight rubber 50 bottom watertight rubber 51 Hamagodan 52 Hamagodan portion

Claims (1)

[Claims] An overturning gate device in which an overturning gate body is installed so as to be able to rise and fall in a water discharge passage of an intake weir, and is provided separately from the overturning gate body so as to be able to stand up and down and fall down by receiving a set water pressure. A rope locking means detachably provided on the falling plate, a holding rope connected between the rope locking means and the falling gate body, and one end connected to the falling gate body at one end. Comprises an up-and-down rope extending on the riverbank side of the intake weir, and the rope locking means comprises:
A fall gate device wherein the fall plate is detached from the fall plate with the fall operation of the fall plate.