JP2002212935A - Swing gate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a swing gate which enables the reliable prevention of the occurrence of a flood in a water channel such as an irrigation canal and enables a reduction in cost by downscaling facilities. SOLUTION: The swing gate 1 is disposed in a branch part 4 which branches off from some midpoint along the irrigation canal 2 and wherein a drainage canal 3 is provided. The swing gate 1 is provided with a door 10 and a swing means 20. The door 10 is provided so as to be swingable between the first swing position A for the blocking of the drainage canal 3 and the second swing position B for the blocking of the downstream side, relative to the branch part 4, of the irrigation canal 2. The swing means 20 makes the door 10 swing from the position A to the position B by receiving the resistance of water flowing through the irrigation canal 2 on condition that the water level of the irrigation canal 2 exceeds a prescribed automatic swing water level when the door 10 is in the position A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swivel gate provided in a waterway such as a waterway for drawing water to a field or a field, and more particularly, to a drainage channel which branches off from the middle of the above-mentioned waterway. A new turning gate arranged at the forked section.

[0002]

2. Description of the Related Art The above-mentioned irrigation canals for drawing water into rice fields and fields are provided, for example, with inlets and outlets in rivers and the like flowing nearby, drawing water from the inlets, and returning the drawn water to the rivers from the outlets. The one configured as described above is generally used.
In addition, there is also known a configuration in which a drainage channel is provided at one or more points in the middle of an irrigation canal so that water drawn from the drainage channel can be returned to a river or the like in addition to the outlet. I have. In the latter case, when draining the water from the drainage channel, manually install a water stop plate on the irrigation channel side to close it, and when not draining the water from the drainage channel, install The waterproof plate is manually attached so as to close it.

[0003]

However, when the water volume of the irrigation canal becomes high and there is a possibility of flooding,
It is required to use the drainage channel to drain the water drawn into the irrigation canal, but the work to install the water stoppage is done manually, and there is not always a worker near the irrigation canal. Therefore, when there is a sudden change in the water volume, there is a risk that flooding will occur due to the inability to attach the water stoppage in time.

[0004] In addition, while electrically detecting a water level provided in a waterway significantly larger than an irrigation waterway,
It is also conceivable to apply a swivel gate that switches the waterway between the main stream side and the tributary side electrically, by changing the size, etc., to the irrigation channel, but it is not cost-effective, and also requires drawing in electrical wiring etc., There is a disadvantage that the equipment becomes large.

The present invention has been made to solve such problems of the prior art, and can reliably prevent floods from occurring in waterways such as irrigation canals. An object is to provide a low-cost turning gate.

[0006]

The turning gate of the present invention comprises:
A first turning position for closing the drainage channel at a first turning position for closing the drainage channel, and a second turning for closing the downstream side of the waterway branching portion. A door pivotally provided over the first position;
Turning means for turning the door from the first turning position to the second turning position by receiving resistance of water flowing in the water channel when the water level of the water channel exceeds a predetermined automatic turning water level when the water channel is at the turning position. It is characterized by doing.

In the turning gate according to the present invention, when the water level of the water channel exceeds the automatic turning water level, the turning means receives the resistance of the water flowing in the water channel and turns the door from the first turning position to the second turning position. Therefore, by setting the automatic turning water level to a level that can prevent flooding, it is possible to reliably prevent flooding from occurring. Further, since the turning of the door is performed by the resistance of the water flowing in the water channel, there is no need for an electric detection or a facility for turning the door electrically, so that the equipment is not large and the cost is low. be able to. However, since the direction of the water flow flowing through the water channel is constant, the door is set in advance at the first turning position that closes the drainage channel, and the door is set to turn to the second turning position due to the resistance of water. When returning to the first turning position after turning to the second turning position, it may be performed manually or the like.

In this case, the center of rotation (axis) of the door is
As in claim 2, a shaft that pivotally supports the door,
It is necessary to have a configuration arranged near the corner between the water channel and the drain channel.

With this configuration, when the door turns in one direction around the axis disposed near the corner, one of the water channel and the drainage channel is closed, and the door turns in the opposite direction. You start blocking the other.

In the turning gate according to the present invention, the turning means generates a force on the flow area side of the door in the first turning position to generate a force for turning the door to the second turning position by receiving resistance of flowing water. It can be configured to have the provided water resistance passive member.

In this configuration, since the water resistance passive member receives the resistance of the flowing water and generates a force to turn the door to the second turning position, a simple mechanism is used as the turning means.
As the water resistance passive member, it is preferable to use, for example, a plate-shaped member easily receiving resistance of flowing water.

[0012] In the turning gate according to the present invention, the water resistance passive member may be provided so that a lower end height thereof is substantially equal to a reference water level lower than the automatic turning water level.

In this configuration, since the lower end of the water resistance passive member is provided so as to substantially coincide with the reference water level, the lower end of the water resistance passive member is immersed in water when the water volume reaches the reference water level. It becomes to receive resistance from running water.

In the turning gate according to the present invention, the water resistance passive member, when the door turns from the first turning position to the second turning position, contacts the side surface of the water channel.
It can be configured so that it rotates around a vertical axis by the force received from the side surface and goes around the side opposite to the side where it is attached to the door.

In this configuration, the water resistance passive member, which generates a force for turning the door to the second turning position in response to the resistance from the flowing water, inherently generates the force at the center of the turning in order to generate a large force. Although it is provided at a place far from the axis, when the water resistance passive member is provided in this way, the turning area of the water resistance passive member is outside the turning area of the door, so that the door contacts the side surface of the water channel. Even if there is, the water resistance passive member goes around to the side opposite to the side where the water resistance passive member is attached to the door, so that the water resistance passive member can be prevented from being damaged.

In the turning gate of the present invention, at least one of the waterway and the door is provided with a door stopping means for holding the door at the first turning position at the first turning position, and the door stopping means is provided with the waterway. When the water level exceeds the automatic turning water level, the door in the first turning position receives the turning force of the door to the second turning position from the door, and the door can be opened.

In this configuration, the door stopping means opens the door in response to the turning force from the door, so that there is no need for electrically operating means.

In the revolving gate according to the present invention, the door stopping means may be a resilient member which bends and deforms in the turning direction of the door and engages with the edge of the door on the side opposite to the shaft until the amount of flexing deformation reaches a predetermined value. Configuration.

In this configuration, it suffices to provide an elastic member, and the structure can be simplified.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described specifically.

FIG. 1 is a plan view showing a turning gate according to an embodiment of the present invention, FIG. 2 is a front view of FIG. 1, and FIG. 3 is a right side view of FIG.

The turning gate 1 is disposed at a branch portion 4 provided with a drain pipe 3 branching from the middle of the irrigation channel 2, and includes a door 10, a turning means 20, and a door stopping means 30. .

The irrigation channel 2 allows water to flow from left to right in FIG. 1. One drain pipe 3 is provided with an inlet in a concave portion 5 provided on the side surface 2a of the irrigation channel 2, and the concave portion 5
It is buried underground so as to pass through the back of the, and water flows from the lower side to the upper side in FIG.

The door 10 is in a first turning position A for closing the drain pipe 3.
And a second turning position B that closes the downstream side of the branch portion 4 of the irrigation channel 2 so as to turn around the shaft 11. When the door 10 is located at the first turning position A, the shaft 11 is disposed at a downstream position of the concave portion 5, that is, at a position C near the corner between the water channel 2 and the drain pipe 3. The upper bearing 7a provided and the lower bearing 7b provided underground are rotatably supported.

When the door 10 is located at the first turning position A, it comes into contact with the door receiver 13 so as to be flush with the side surface 2a, and when it is located at the second turning position B, the side surface 2a
An edge 12 opposite to the shaft 11 of the door 10 enters a concave portion 6 provided on a side surface 2b opposite to the side surface 2b, and comes into contact with a door receiver 7 provided in the concave portion 6. That is, the width of the door 10 is formed slightly longer than the width dimension of the irrigation channel 2.

The door stopping means 30 has an elastic member, for example, a plate-like rubber 31 arranged to stop the edge 12 of the door 10 located at the first turning position A. The plate-like rubber 31 is provided with the attachment 32 on the side surface 2a such that the right edge 31a is located closer to the water channel 2 than the edge 12 of the door 10 located at the first turning position A and overlaps the edge 12. And prevent the door 10 from opening. That is, the plate-like rubber 31 bends and deforms in the turning direction of the door 10,
It is engaged with the edge 12 of the door 10 until the amount of bending deformation reaches a predetermined value, thereby preventing the door 10 from being opened.

The turning means 20 includes a bearing 21 provided on the side of the water channel 2 of the door 10 located at the first turning position A;
It has a water resistance passive member rotatably attached to the bearing 21, for example, a plate member 22 having a columnar shaft 22a on one end side. The bearing 21 is formed of a cylindrical member whose bottom is closed, and a shaft 22 inserted inside the cylindrical member.
The lower end of “a” is received at the bottom, and the plate-like member 22 is rotatably supported. A coil spring 23 is provided with the shaft 22a inserted inside, and one end of the coil spring 23 is connected to the plate-like member 22.
By locking the other end to the bearing 21, the edge 22 b on the other end side of the plate-like member 22 is elastically urged against the plate-like member 22 so as to move away from the door 10. The plate-like member 22 has an edge 22d on one end side of the door 10.
, Stops against the elastic biasing force from the coil spring 23.

The plate member 22 is set such that the lower end 22c on the edge 22b side lower than the edge 22d side coincides with the reference water level substantially corresponding to the dangerous water level of the irrigation channel 2. When the door 10 is located at the first turning position A, the plate-like member 22 projects toward the irrigation channel 2 due to the elastic biasing force of the coil spring 23 (including the water flow when the water level is higher than the reference water level). Further, the plate-shaped member 22 is configured such that the turning area of the edge portion 22b is located outside the turning area (indicated by a two-dot chain line) in which the door 10 turns, and the door 10 is in the first turning position A.
When it turns from and approaches the second turning position B, it contacts the side surface 2b and rotates upstream of the irrigation channel 2. Immediately before reaching the second turning position B, the door 10 turns around on the side opposite to the bearing 21. Specifically, the plate-shaped member 22 is formed such that the lower end 22c on the side of the edge 22b is lower and the lower end on the side of the shaft 22a is higher than that, and immediately before reaching the second turning position B, the side of the edge 22b is The shaft 22a passes through the outside of the edge 12 of the door 10 and turns around to the opposite side by passing over the upper edge of the door 10. 1 and 3 is a flat concrete bottom provided on the bottom surface of the irrigation channel 2, and when the concrete bottom D is provided, the bottom surface of the irrigation channel 2 becomes uneven and the door 10 has The opening and closing of the door can be prevented, and the door 10
Opening and closing can be stabilized.

Next, the operation of the turning gate according to this embodiment having the above-described structure will be described.

When water is to flow only through the water channel 2, the door 10 is located at the first turning position A. At this time, the plate-like rubber 3
The right edge 31a of 1 is located closer to the water channel 2 than the edge 12 of the door 10 to prevent the door 10 from opening.

When the level of the water flowing through the irrigation channel 2 is normal, the lower end of the plate-like member 22 is located at a position higher than a predetermined reference water level. The plate-like member 22 does not receive resistance from the water flow flowing through the irrigation channel 2, the edge 31a of the plate-like rubber 31 is engaged with the edge 12 of the door 10, and the door 10 is closed by the plate-like rubber 31. Up to.

On the other hand, when the level of the water flowing through the irrigation channel 2 reaches the reference water level, the lower end 22c of the plate-like member 22 is immersed in the water flowing through the irrigation channel 2, so that the plate 10
Is generated from the first turning position A to the second turning position B. In addition, the plate-like rubber 31
Is flexed and deformed in the corresponding turning direction of the door 10. Furthermore, when the water level increases, the turning force generated in the plate-like member 22 and the amount of bending deformation of the plate-like rubber 31 both increase.

When the water level rises further and reaches the automatic turning water level, the turning force generated in the plate member 22 and the plate rubber 31
And the amount of bending deformation further increases, the edge 12 of the door 10 comes out of the edge 31a of the greatly deformed plate-like rubber 31 from inside to outside, and the door 10 is located at the second turning position B. And so on.

When the door 10 approaches the second turning position B, the edge 22b of the plate member 22 comes into contact with the side surface 2b of the irrigation channel 2, and the plate member 22 is directed toward the upstream side by the force received from the side surface 2b. To rotate. Then, before the door 10 reaches the second turning position B, the edge 22b passes through the outside of the edge 12 of the door 10, and the shaft 22a turns over the upper edge of the door 10 to the opposite side. After that, the door 10 is moved to the second turning position B.
, The edge 12 of the door 10 comes into contact with the door receiver 7 provided in the concave portion 6 of the side surface 2b, and the turning operation of the door 10 stops, whereby the door 10 is located at the second turning position B. Become. In this state, the water flowing only in the irrigation channel 2 is blocked by the turning gate 1 and the drain pipe 3
To prevent flooding.

After that, when the water level of the water channel 2 becomes low and the water is no longer dangerous, the plate-like member 22 is held by hand against the elastic urging force of the coil spring 23 and is kept rotated to the opposite side of the door 10. The door 10 is manually turned from the second turning position B to the first turning position A. Thereby, the right edge 31a of the plate-shaped rubber 31 is located closer to the irrigation channel 2 than the edge 12 of the door 10, and the opening of the door 10 is prevented.
The hand is released from the plate-shaped member 22 on the way from the second turning position B to the first turning position A. Thereby, the plate-like member 22
Returns to the original state by the elastic biasing force of the coil spring 23.

Therefore, according to the present embodiment,
When the water level of the water channel 2 exceeds the automatic water level, the turning means 20 turns the door 10 from the first turning position A to the second turning position B due to the resistance of the water flowing through the water channel 2, so that the automatic turning water level is flooded. By setting the water level at a level that can prevent flooding, it is possible to reliably prevent flooding from occurring. In addition, since the turning of the door 10 is performed by the resistance of the water flowing through the irrigation channel 2, no equipment for electrically detecting or electrically turning the door is required, and the equipment is not enlarged.
The cost can be reduced.

In the present embodiment, the shaft 11 for pivotally supporting the door 10 is disposed at a position C near the corner between the water channel 2 and the drain pipe 3. When the door 10 turns in one direction around the shaft 11 disposed at the position C near the corner, the water channel 2 and the drain pipe 3
And when the door 10 turns in the opposite direction, the other will be closed. Further, since the plate-like member 22 receives the resistance of the flowing water flowing through the irrigation channel 2 to generate a force for turning the door 10 to the second turning position B side, the turning means 20 is a simple mechanism. Further, since the lower end of the plate-shaped member 22 is provided so as to substantially coincide with the reference water level, when the water volume reaches the reference water level, the lower end of the plate-shaped member 22 is immersed in water and receives resistance from flowing water. Become like In addition, the plate-shaped member 22 that generates a force for turning the door 10 to the second turning position B in response to the resistance from the flowing water flowing through the irrigation channel 2 has a shaft 11 which is originally a turning center, in order to generate a large force. The plate-like member 22 is provided at a location far from
When turning from the turning position A to the second turning position B, when it comes into contact with the side surface 2 b of the irrigation channel 2, it turns around the vertical axis due to the force received from the side surface 2 b, and is turned on the opposite side to the side attached to the door 10. Since it goes around, it is possible to prevent the plate-like member 22 from being damaged.

The door 10 at the first turning position A is moved to the first position.
A door stop means 30 for holding at the turning position A is attached to the irrigation channel 2 side, and when the water level of the irrigation channel 2 exceeds the reference water level, the door 10 at the first turning position A is opened.
Receiving the turning force to the second turning position B from the door 10 and the door 10
, So that there is no need for an electrically operated means. The door stopper means 30 includes a plate-like rubber 31 that bends and deforms in the turning direction of the door 10 and engages with the edge 12 of the door 10 on the side opposite to the shaft 11 until the amount of bending deformation reaches a predetermined value.
In the case of having a configuration having the above, it is only necessary to provide the plate-like rubber 31, and the configuration can be simplified.

In the above-described embodiment, the plate-like rubber 31 as the door stopper is provided on the water channel 2 side so that the door 10 is not easily opened, but the present invention is not limited to this. For example, a plate-like rubber is provided on the edge of the door 10,
It is good also as composition provided with the projection which presses tabular rubber from the outside on the waterway 2 side. Further, the present invention is not limited to the plate-like rubber, and a coil spring or the like can be used as the door stopper.

In the above-described embodiment, the turning means is provided at a position near the edge 12 of the door 10. However, the present invention is not limited to this, and the turning means may be provided at the center in the width direction of the door 10 or near the shaft 11. Of course, it may be provided. With this configuration, although it is necessary to increase the size of the plate-shaped member in order to increase the resistance received from the flowing water, the turning area of the plate-shaped member can be arranged inside the turning area of the door, and the second turning position can be provided. Immediately before reaching B, the plate-shaped member does not need to be turned around on the side opposite to the mounting side, so that a simpler structure can be achieved.

Further, in the above-described embodiment, the water channel 2 is straight, and the turning gate is disposed at a branch portion in which a drain pipe as a drain channel is provided at a halfway position in an orthogonal state. Not limited to For example, as shown in FIG. 4, a branch 10 provided with a drainage channel 3 in a diagonal direction from a location where the water channel 2 is curved is provided with a door 10 of the present invention and a turning means 2.
The same applies to the case where the turning gate 1 having at least 0 is arranged. Also, the present invention
It is needless to say that the present invention can be similarly applied to not only the irrigation canals but also general canals.

[0042]

As described above in detail, in the case of the present invention, when the water level of the water channel exceeds the automatic turning water level, the turning means is provided.
Since the door is turned from the first turning position to the second turning position in response to the resistance of the water flowing in the water channel, it is ensured that a flood will occur by setting the automatic turning water level to a level that can prevent flooding. Can be prevented. In addition, since the turning of the door is performed by the resistance of the water flowing through the water channel, there is no need for electrical detection or equipment for turning the door electrically, so that the equipment is not large-scale and the cost is low. be able to.

[Brief description of the drawings]

FIG. 1 is a plan view showing a turning gate according to an embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a right side view of FIG. 2;

FIG. 4 is a diagram showing an example of another branching portion to which the turning gate of the present invention can be applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Swivel gate 2 Waterway 3 Drainage pipe (drainage channel) 4 Branch part 5 Concave part 10 Door 11 Shaft 20 Turning means 21 Bearing 22 Plate member (water resistance passive member) 23 Coil spring 30 Door stopper means 31 Plate rubber (elastic member) A first turning position B second turning position

Claims (7)

[Claims] 1. A turning gate which is disposed at a branch portion provided with a drainage passage branching from a middle of a waterway, wherein a first turning position for closing the drainage passage is located downstream of the branching portion of the waterway. A door provided so as to be able to turn over a second turning position for closing the water, and when the door is at the first turning position, when the water level of the waterway exceeds a predetermined automatic turning water level, the resistance of water flowing through the waterway A turning means for turning the door from the first turning position to the second turning position in response to the rotation. 2. The swivel gate according to claim 1, wherein a shaft for rotatably supporting the door is arranged near a corner portion between the water channel and the drainage channel. 3. A water resistance provided on the flow area side of the door in the first turning position to generate a force for turning the door to the second turning position in response to flowing water resistance. The turning gate according to claim 1, further comprising a passive member. 4. The turning gate according to claim 3, wherein the water resistance passive member is provided such that a lower end height thereof substantially coincides with a reference water level lower than the automatic turning water level. 5. The water resistance passive member, when the door turns from the first turning position to the second turning position, when the door comes into contact with a side surface of the water channel, the water resistance passive member rotates around a vertical axis by a force received from the side surface. The revolving gate according to claim 3, wherein the revolving gate is configured to rotate and turn around a side opposite to a side where the door is attached to the door. 6. A door stop means for holding a door at a first turning position at a first turning position is attached to at least one of the water channel and the door, and the door stopping means is adapted to adjust the water level of the water channel to the automatic level. The turning according to any one of claims 1 to 5, wherein when the turning water level is exceeded, the door is opened by receiving a turning force of the door at the first turning position to the second turning position from the door. Gate. 7. The door stopping means includes an elastic member which bends and deforms in the turning direction of the door and engages with an edge of the door on the side opposite to the shaft until the amount of bending deformation reaches a predetermined value. The turning gate according to claim 6, wherein