JP2002021052A - Upstream and downstream water level adjusting mechanism for automatic water level adjusting gate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To open or close a radial gate by increasing or decreasing the water weight of a water weight container in response to the fluctuation in water level at the upstream side of a water channel. SOLUTION: A radial gate 1 opening or closing a water channel 2 is installed toward the upstream side 2a of the water channel, an upstream side water chamber 10, a downstream side water chamber 11 and a float chamber 12 are provided, a float 15 is provided in the float chamber 12, which moves upward or downward by following the fluctuation of the water level in the predetermined water level range, an overflow water conveyance tube 13b having an overflow hole 13 moving up or down in response to the up and down motions of the float 15 is provided, a water weight 14 having a water chamber inside the downstream side water chamber 11 is provided, one end of a flexible conveyance tube 14a is connected to the bottom portion of the water weight 14, the other end is connected to the overflow water conveyance tube 13b, and a drain throttle portion 14b is provided at the bottom portion of the water weight 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water level control gate for adjusting a water level by opening and closing a radial gate in response to a change in water level. This is related to the upstream / downstream water level adjustment mechanism of an automatic water level adjustment gate that opens and closes the radial gate by increasing / decreasing the weight and opening / closing the radial gate in response to fluctuations in the water level on the downstream side of the waterway, in addition to opening and closing the radial gate. is there.

[0002]

2. Description of the Related Art Conventionally, a water level control gate is used to open or close a gate in response to a change in water level, thereby adjusting a discharge amount in accordance with an inflow amount or maintaining a constant water level. And so on. Incidentally, the applicant of the present application has an upstream water chamber and a downstream water chamber, the upstream water chamber communicates with the upstream of the water channel, the downstream water chamber communicates with the downstream of the water channel, and the downstream water chamber. Is provided with a water weight, and the water weight of the water weight increases or decreases due to the water introduced from the overflow port provided in the upstream water chamber. We are creating a water level control radial gate that can be opened and closed in the middle.

[0003]

However, in a water level control radial gate having a structure in which the radial gate is automatically opened and closed by using the above-mentioned water weight whose weight increases and decreases, the water level fluctuation on the upstream side of the water channel cannot be dealt with. Since the radial gate is opened and closed by increasing or decreasing the weight of the water weight, the radial gate cannot be opened and closed when the water level on the downstream side of the channel fluctuates. It is conceivable that the water level on the downstream side of the waterway cannot be suppressed by replenishing the water on the upstream side of the waterway to the downstream side of the waterway.

The present invention has been made in view of the above problems, and has been made in order to solve the problems. An object of the present invention is to adjust the water weight in response to fluctuations in the water level upstream of the water channel. In addition to opening and closing the radial gate by increasing or decreasing the water weight, in addition to the water level fluctuation on the downstream side of the channel, the radial gate is opened and closed by increasing or decreasing the water weight of the water weight, and the water level on the downstream side of the channel is raised. An object of the present invention is to provide an upstream / downstream water level adjustment mechanism for an automatic water level adjustment gate which can suppress water drop on the downstream side of a water channel by replenishing water on the upstream side of the water channel when the water level is lowered.

[0005]

In order to achieve the above object, the present invention is directed to a rotating shaft which is connected to a rotating shaft provided above a water channel via an arm and is rotated vertically. A radial gate that opens and closes the waterway is installed facing the upstream of the waterway,
A water weight chamber is provided on the side of the radial gate, an upstream water chamber, a downstream water chamber, and a float chamber are provided in the water weight chamber, and an upstream communication path is provided for communicating the upstream water chamber with the upstream of the water channel. An intermediate communication passage communicating the downstream water chamber and the float chamber at a required height or higher is provided, and a downstream communication passage communicating the float chamber and the downstream of the water passage is provided. A float that rises and falls according to the fluctuation of the water level is provided, and an overflow water conduit having an overflow port that rises and falls in conjunction with the rise and fall of the float is provided in the upstream water chamber, and water is internally provided in the downstream water chamber. Providing a water weight with a chamber,
One end of the flexible introduction passage is connected to the lower part of the water weight, the other end is connected to the overflow water conduit, and a drainage restrictor is provided at the lower part of the water weight. The radial gate is opened and closed by increasing or decreasing the weight of the water weight due to the water introduced from the upstream side of the waterway using the water level difference from the downstream side of the waterway, and linked to the rise and fall of the float in the float chamber when the water level on the downstream side of the waterway fluctuates Then, the overflow port of the overflow water conduit is raised and lowered to open and close the radial gate by increasing or decreasing the weight of the water weight due to the water introduced from the upstream side of the water channel.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically based on embodiments of the invention shown in the drawings. Here, FIG. 1 is a side sectional view, and FIG. 2 is a plan view.

[0007] In the figure, a radial gate 1 installed in a water channel 2 has a function of rotating up and down to open and close the water channel 2 and discharge or block the flow of water. The waterway 2 is divided into a waterway upstream side 2a and a waterway downstream side 2b by a radial gate 1, and the radial gate 1 is installed toward the waterway upstream side 2a. The radial gate 1 includes a door 3, an arm 4, a rotating shaft 5, and the like.

The door body 3 has a function of directly opening and closing the water channel 2, and is composed of, for example, a skin plate having an arc-shaped cross section. The door body 3 is arranged so as to block the water channel 2, that is, at right angles to the water flow direction of the water channel 2, and is arranged such that the arc-shaped convex surface side of the door body 3 faces the water channel upstream side 2 a. The door 3 is made of a material having a strength that can withstand a certain water pressure.

On the other hand, on the left and right sides of the arc-shaped concave surface of the door body 3, linear arms 4 extend upward above the water channel downstream side 2b. That is, each of the arms 4 arranged on the left and right extends toward a rotation shaft 5 laterally provided at the center of curvature of the arc-shaped door body 3, and the end thereof is connected to the rotation shaft 5. The door 3 is supported on the rotating shaft 5 via these arms 4 so as to be freely rotatable in the vertical direction.

The turning shaft 5 is a portion which becomes a turning center of the radial gate 1 which turns up and down to open and close the water channel 2, is provided horizontally above the water channel downstream side 2 b of the door 3, and has a predetermined position. Made of a material that can withstand the strength of Both ends of the rotating shaft 5 are provided on bearings 6 installed above the left and right side walls on the downstream side 2b of the water channel so as to be rotatable around the vertical direction.

On the opposite side of the arm 4 with respect to the rotating shaft 5, the base ends of a linear weight arm 7 are attached to the left and right ends of the rotating shaft 5, respectively. Each of the right and left weight arms 7 is attached on an extension of the arm 4. A counterweight 8 is horizontally provided between the distal ends of the left and right weight arms 7.

The counterweight 8 is provided to balance the weight of the door body 3 and to reduce the weight of the door body 3 when rotating the door body 3 in the vertical direction. The rotational moment of the counterweight 8 acting on the rotating shaft 5 is slightly smaller than the rotational moment of the door body 3 acting on the rotating shaft 5, and the directions of the rotating directions are opposite to each other.

On one side of the water channel 2 where the radial gate 1 is installed, a water weight chamber 9 is provided. The water weight chamber 9 is partitioned into an upstream water chamber 10, a downstream water chamber 11, and a float chamber 12 by, for example, middle partitions 9a and 9b.

An upstream communication passage 10a is provided for communicating the upstream water chamber 10 with the water passage upstream 2a. The water level of the upstream water chamber 10 becomes the same as the water level of the water passage upstream side 2a through the upstream communication passage 10a. One end of the upstream communication passage 10a is opened at the lower part of the channel side wall on the upstream side 2a of the channel so that when the inflowing water is mixed with sand or the like, it easily precipitates at the bottom of the upstream water chamber 10. Upstream inlet 10
b, and the other end is connected and opened to the lower side wall of the upstream water chamber 10.

The upstream water chamber 10 is provided with an overflow cylinder 13a having an overflow port 13 which rises and falls in conjunction with the rise and fall of the float 15 within a predetermined water level range on the upstream side 2a of the water channel. The overflow cylinder 13a having the overflow port 13 is provided with an overflow water conduit 13b.
It is attached to the upper end side so as to be able to move up and down within a predetermined water level range. The overflow 13 prevents the sand and the like from flowing together with the water by causing the water on the water surface side of the upstream water chamber 10 to overflow when the incoming water is mixed with sand and the like.

An overflow water conduit 13b provided with an overflow cylinder 13a having an overflow port 13 at the upper end so as to be able to move up and down is mounted vertically inside the upstream water chamber 10, and is provided with an overflow water conduit 13b. The lower end of the water inlet 10 extends below the upstream water chamber 10, extends laterally therefrom, penetrates the partition 9 a, and is introduced into a water weight 14 provided in the downstream water chamber 11 as described later. It communicates via the passage 14a.

An intermediate communication passage 11a for communicating the downstream water chamber 11 and the float chamber 12 is provided. Downstream water chamber 1
1 is located at the upper end side of the intermediate communication passage 11a.
1b is mounted at a required height position. Discharge cylinder 11
The mounting height of b is adjustable. Further, the lower end of the intermediate communication passage 11a has an intermediate outlet 1 opened at the lower side of a middle partition 9b that separates the downstream water chamber 11 and the float chamber 12.
1c.

The water level of the downstream water chamber 11 passes through the intermediate communication passage 11a, the float chamber 12, and the downstream communication passage 12a, and when the water level of the downstream side of the channel 2b is higher than the set water level, the water level of the downstream side of the channel 2b. When the water level on the downstream side 2b of the water channel is equal to or lower than the set water level, the set water level is maintained.

A water weight 14 is provided in the downstream water chamber 11. The inside of the water weight 14 is a hollow water chamber, and the weight of the water weight 14 is adjusted by introducing water from the upstream side of the water channel 2a into the hollow water chamber. Water weight 1
One end of a flexible introduction passage 14a capable of following the fluctuation of the water weight 14 is connected to a lower part of the fourth. The other end of the flexible introduction passage 14a is connected to the overflow water conduit 13b.

The water weight 14 is supplied to the flexible introduction passage 14.
a, the overflow water conduit 13b, overflow cylinder 13a, overflow port 1
3, communicates with the water channel upstream 2a through the upstream water chamber 10, the upstream communication passage 10a, and the upstream introduction port 10b;
Water on the upstream side of the water channel 2a can be introduced.

At the lower part of the water weight 14, there is provided a drainage narrowing portion 14b for discharging the internal water to the downstream water chamber 11. Further, an air hole (not shown) is formed in an upper portion of the water weight 14. The water level in the water weight 14 is determined by the water flowing through the flexible introduction passage 14a.
b, the downstream water chamber 1
Therefore, the water weight becomes higher than the water level 1 and the water weight 14 is heavy.

A downstream communication passage 12a is provided for communicating the float chamber 12 with the water downstream 2b. The water level in the float chamber 12 becomes the same as the water level on the downstream side 2b of the water channel through the downstream communication passage 12a. One end of the downstream communication passage 12a is connected to a downstream outlet 12b opened at a lower portion of the channel side wall on the downstream side 2b of the channel, and the other end is connected to the float chamber 12a.
The connection opening is formed on the lower side wall.

Inside the float chamber 12, there is provided a float 15 which rises and falls in accordance with a change in water level within a predetermined low water level range. The rising and falling float 15 raises and lowers the overflow cylinder 13a having the overflow 13 through a float overflow interlocking mechanism 16 described later.

The float 15 rises and lowers due to buoyancy acting due to fluctuations in the water level. The float chamber 12 has an upper limit stopper 15a for preventing the float 15 from rising and a float 15 so that the float 15 rises and falls only within a predetermined water level range. A lower limit stopper 15b for preventing the lowering of the float 15 is provided, and the float 15 moves up and down between the upper limit stopper 15a and the lower limit stopper 15b.

The height positions of the upper limit stopper 15a and the lower limit stopper 15b that regulate the range of elevation of the float 15 are determined by the adjustment range of the water level on the downstream side 2b of the water channel. For example, when it is desired to adjust the water level of the downstream side 2b of the water channel within a range of a considerably low water level, the position of the upper limit stopper 15a is a considerably low position.

The float overflow interlocking mechanism 16 is a mechanism for transmitting the elevation of the float 15 to the overflow 13 and moving the overflow 13 up and down in conjunction with the elevation of the float 15. The main wire rope 16a and the wire sheave 16b , Wound drum 16
c, a weight 16d, a suspension wire rope 16e, and the like.

The wire sheave 16b is rotatably supported directly above the float 15, and the winding drum 16c is rotatably supported directly above the overflow cylinder 13a having the overflow port 13. The wire sheave 16b and the winding drum 16
A wire rope 16a having a float 15 connected to one end and a weight 16d connected to the other end is stretched between the wire rope 16c and the wire rope 16c.

That is, the horizontal wire rope 16a is bent downward at one end by a wire sheave 16b and connected to the float 15 below the wire rope 16a. The intermediate side of the wire rope 16a extends horizontally and the other end is wound by a winding drum. It is wound several times around 16c, extends downward and extends, and has a weight 16d connected to the other end. The weight 16d is suspended in the air by a wire rope 16a.

The hanging wire rope 16 is wound around the winding drum 16c.
The upper end of e is wound in a direction opposite to the other end of the main wire rope 16a. The lower end of the suspension wire rope 16e whose upper end is wound in the reverse direction around the winding drum 16c is the overflow cylinder 1
3a, the overflow cylinder 13a moves up and down integrally with the lower end of the suspension wire rope 16e.

Since the other end of the main wire rope 16a and the upper end of the hanging wire rope 16e are wound in opposite directions on the winding drum 16c, the overflow cylinder 13a connected to the lower end of the hanging wire rope 16e is provided. Is the main wire rope 1
The upper and lower members 6a move up and down in the same direction in conjunction with the float 15 connected to one end of the 6a.

That is, the float 15 rises due to the buoyancy that acts when the water level in the float chamber 12 rises, and the float 15 connected to one end of the main wire rope 16a is connected to the rising direction, that is, the other end of the main wire rope 16a. Weight 16
When the winding drum 16c rotates in the direction in which d descends, the suspension wire rope 16e whose upper end is wound around the rotating winding drum 16c has its lower end wound up, and the overflow cylinder 13a connected to the lower end thereof. Rises.

Conversely, the water level of the float chamber 12 drops and the float 15 also drops by its own weight, and the float 15 connected to one end of the main wire rope 16a is connected in the descending direction, that is, connected to the other end of the main wire rope 16a. When the winding drum 16c rotates in the direction in which the weight 16d is hoisted, the suspension wire rope 16e, the upper end of which is wound around the rotating winding drum 16c, has its lower end lowered and its overflow connected to the lower end. The cylinder 13a descends.

The diameter of a winding drum 16c around which the other end of the main wire rope 16a to which the float 15 is connected is wound,
The diameter of the winding drum 16c around which the upper end of the suspension wire rope 16e to which the overflow cylinder 13a is connected is the same or different depending on the water level range controlled by the water passage downstream side 2b.

A water weight rotation shaft 17 extending above the water weight chamber 9 is connected to one end of the rotation shaft 5 on the side of the water weight chamber 9, and the water weight rotation shaft 17 is turned. It is coaxial with the driving shaft 5. Base ends of a water weight arm 18 are connected to both ends of the water weight rotation shaft 17, respectively.

The left and right water weight arms 18 are connected to the rotating shaft 5.
Is extended toward the side opposite to the arm 4 with the water weight 14 being suspended from the end thereof. That is, the water weight 14 is replaced with the water weight arm 18.
It is installed to hang on.

The weight of the water weight 14 is transmitted to the rotation shaft 5 via the water weight arm 18 and the water weight rotation shaft 17, and is opposite to the rotation moment acting on the rotation shaft 5 by the weight of the door body 3. A rotating moment is applied to the rotating shaft 5.

Next, the operation when the water level changes on the upstream side of the water channel based on the configuration of the above embodiment of the present invention will be described below. When the water level on the upstream side of the waterway 2a is higher than the water level on the downstream side 2b of the waterway and higher than a predetermined water level, the upstream side 2a of the waterway
The water level of the upstream water chamber 10 communicating with the upstream inlet 10b and the upstream communication passage 10a is equal to the upstream inlet 1
Ob and the water flowing in from the waterway upstream 2a through the upstream communication passage 10a cause the water level to fluctuate at the same height as the water level on the waterway upstream 2a.

When the water level in the upstream water chamber 10 fluctuates at the same height as the water level on the upstream water path 2a due to the water flowing from the upstream water path 2a, the overflow cylinder 1 provided in the upstream water chamber 10 is changed.
Since the overflow port 13a of 3a is installed at a height slightly lower than the predetermined water level of the upstream water chamber 10, the upstream inlet port 10b and the upstream connection port from the water surface of the upstream water chamber 10 through the overflow port 13 are formed. Water on the upstream side 2a of the water channel flowing through the passage 10a overflows and flows in.

The water on the upstream side 2a of the water channel, which has overflowed and flowed in from the overflow port 13, flows from the one end of the flexible introduction passage 14a to the downstream through the overflow cylinder 13a, the overflow water conduit 13b, and the flexible introduction passage 14a. The water flows into a water weight 14 provided in the water chamber 11. The water is introduced into the water weight 14 by utilizing the water level difference.

The flow of water into the water weight 14 from the waterway upstream 2a is caused by the fact that the water level in the water weight 14 is
The process is performed until the water level in the upstream water chamber 10 becomes the same as that of the water weight a, but a drainage throttle portion 14b is provided below the water weight 14. For this reason, a part of the water flowing into the water weight 14 passes through the drainage narrowing portion 14b and the downstream water chamber 11
Is discharged inside.

In the water weight 14, the water level in the water weight 14 becomes higher than that of the downstream water chamber 11 by an amount corresponding to the water loss head due to the drainage narrowing portion 14b, and the water weight 14 is heavy and heavy. The water weight generated in the water weight 14 pulls the distal end of the water weight arm 18 that suspends the water weight 14 downward.

For this reason, a clockwise rotational moment acts on the water weight rotating shaft 17 to which the base end of the water weight arm 18 is connected. Water weight rotating shaft 17
The rotary moment acting on the rotary shaft 5 also acts on the rotary shaft 5 coaxial therewith.

In addition to this, a counterclock 8 always applies a clockwise rotational moment to the rotating shaft 5, and a clockwise rotational moment acting on the rotating shaft 5 by the water weight 14 and the counterweight 8 is applied. When the counterclockwise rotation moment acting on the rotating shaft 5 due to the weight of the door body 3 becomes larger, the arm 4 is attached to the rotating shaft 5.
The door body 3 connected via the shaft rotates clockwise, that is, upwards around the rotation shaft 5, whereby the water channel 2 is opened and drained from the water channel upstream side 2 a to the water channel downstream side 2 b. .

It should be noted that the drainage restricting section 1
The water discharged into the downstream water chamber 11 through 4b is stored in the downstream water chamber 11 when the water level of the downstream water chamber 11 and the water passage downstream 2b is equal to or lower than the upper end height of the discharge cylinder 11b,
The water level in the downstream water chamber 11 rises. Then, when the water level in the downstream water chamber 11 reaches the height of the upper end of the discharge cylinder 11b, the water is discharged to the water downstream 2b through the intermediate communication path 11a and the downstream communication path 12a of the float chamber 12.

On the other hand, when the water level on the upstream side 2a of the water channel lowers, the upstream water chamber 10 also lowers at the same water level, and flows from the overflow port 13 in the upstream water chamber 10 into the overflow cylinder 13a. The inflowing water decreases, the amount of water in the water weight 14 flowing through the overflow port 13, the overflow cylinder 13a and the flexible introduction passage 14a also decreases, and the weight of the water weight 14 also decreases.

Therefore, the clockwise rotational moment acting on the rotating shaft 5 via the water weight arm 18 and the water weight rotating shaft 17 is also reduced by the weight of the water weight 14. Note that the clockwise rotational moment constantly applied by the counterweight 8 is constant.

The counterclockwise rotating moment acting on the rotating shaft 5 by the weight of the door body 3 is equal to the water weight 1.
4 and the counterweight 8, the rotation moment acting on the rotation shaft 5 in the clockwise direction becomes larger.
The door body 3 connected via the arm 4 rotates counterclockwise, that is, downwards around the rotation axis 5, whereby the water channel 2 is closed, and the water channel upstream side 2 a to the water downstream side 2.
The drainage to b is stopped and backflow is prevented.

Next, the operation at the time of low water level fluctuation on the downstream side of the water channel based on the configuration of the embodiment of the present invention will be described below. When the water level on the downstream side of the waterway 2b fluctuates in a state of a lower water level than the water level on the upstream side 2a of the waterway, the float chamber 12 communicating with the downstream side 2b of the waterway and the downstream outlet 12b and the downstream communication passage 12a is formed. The water level is determined by the downstream outlet 12b and the downstream communication passage 12a.
f and fluctuates at the same level as the water level on the downstream side 2b of the water channel.

When the water level in the float chamber 12 fluctuates at the same height as the water level on the downstream side 2b of the water channel due to the water flowing from the downstream side 2b of the water channel, the float 15 in the float chamber 12 is acted on by the buoyancy and its own weight to cause the upper limit stopper 15a and It moves up and down within the range of the lower limit stopper 15b.

When the float 15 moves up and down, the weight 16d also moves up and down by its own weight of the weight 16d connected to the other end of the main wire rope 16a, and the winding drum 16c raises or lowers the hanging wire rope 16e. , The overflow cylinder 13a connected to the lower end of the suspension wire rope 16e is pulled up or down. As described above, when the float 15 moves up and down, the overflow port 13 of the overflow cylinder 13a provided in the upstream water chamber 10 interlocked with the float 15 via the float overflow port interlocking mechanism 16 also has the same upper and lower sides. Go up and down in the direction.

In this case, when the low water level on the downstream side 2b of the water channel fluctuates further, the float 15 starts to descend by its own weight. In conjunction with the lowering of the float 15, the overflow port 13 of the overflow cylinder 13a also lowers and the upstream water chamber 10
When the water level becomes lower than the water level of the upstream side water chamber 10, the upstream side inlet 10b and the upstream side communication passage 1
The water on the upstream side 2a of the water channel flowing through Oa overflows and flows in.

The water on the upstream side 2a of the water channel, which has overflowed and flowed in from the overflow port 13, flows from one end of the flexible introduction passage 14a to the downstream side through the overflow cylinder 13a, the overflow water conduit 13b, and the flexible introduction passage 14a. The water flows into a water weight 14 provided in the water chamber 11. The water is introduced into the water weight 14 by utilizing the water level difference.

The flow of water into the water weight 14 from the waterway upstream 2a is caused by the fact that the water level in the water weight 14 is
The process is performed until the water level in the upstream water chamber 10 becomes the same as that of the water weight a, but a drainage throttle portion 14b is provided below the water weight 14. For this reason, a part of the water flowing into the water weight 14 passes through the drainage narrowing portion 14b and the downstream water chamber 11
Is discharged inside.

In the water weight 14, the water level in the water weight 14 becomes higher than that of the downstream water chamber 11 by the amount of the lost water due to the drainage narrowing portion 14b, and the water weight 14 is heavy and heavy. The water weight generated in the water weight 14 pulls the distal end of the water weight arm 18 that suspends the water weight 14 downward.

Therefore, a clockwise rotation moment acts on the water weight rotation shaft 17 to which the base end of the water weight arm 18 is connected. Water weight rotating shaft 17
The rotary moment acting on the rotary shaft 5 also acts on the rotary shaft 5 coaxial therewith.

In addition to this, a counterclock 8 always applies a clockwise rotational moment to the rotating shaft 5, and the clockwise rotational moment applied to the rotating shaft 5 by the water weight 14 and the counterweight 8. When the counterclockwise rotation moment acting on the rotating shaft 5 due to the weight of the door body 3 becomes larger, the arm 4 is attached to the rotating shaft 5.
The door body 3 connected via the shaft rotates clockwise, that is, upwards around the rotation shaft 5, whereby the water channel 2 is opened and discharged from the water channel upstream side 2 a to the water channel downstream side 2 b. In other words, the lowering of the water level on the downstream side of the canal is suppressed.

It should be noted that the drainage restricting section 1
The water discharged into the downstream water chamber 11 through 4b is stored in the downstream water chamber 11 when the water level of the downstream water chamber 11 and the water passage downstream 2b is equal to or lower than the upper end height of the discharge cylinder 11b,
The water level in the downstream water chamber 11 rises. Then, when the water level in the downstream water chamber 11 reaches the height of the upper end of the discharge cylinder 11b, the water is discharged to the water downstream 2b through the intermediate communication path 11a and the downstream communication path 12a of the float chamber 12.

On the other hand, when the low water level on the downstream side 2b of the water channel fluctuates in a rising direction, the float 15 starts to rise due to the buoyancy acting thereon. When the overflow port 13 of the overflow cylinder 13a also rises in conjunction with the rise of the float 15, the amount of water flowing into the overflow cylinder 13a from the overflow port 13 in the upstream water chamber 10 decreases, and the overflow occurs. The amount of water in the water weight 14 flowing through the mouth 13, the overflow cylinder 13a and the flexible introduction passage 14a also decreases, and the weight of the water weight 14 also decreases.

Therefore, the clockwise rotational moment acting on the rotating shaft 5 via the water weight arm 18 and the water weight rotating shaft 17 is also reduced by the weight of the water weight 14. Note that the clockwise rotational moment constantly applied by the counterweight 8 is constant.

The counterclockwise rotational moment acting on the rotating shaft 5 by the weight of the door body 3 is changed to the water weight 1.
4 and the counterweight 8, the rotation moment acting on the rotation shaft 5 in the clockwise direction becomes larger.
The door body 3 connected via the arm 4 rotates counterclockwise, that is, downwards around the rotation axis 5, whereby the water channel 2 is closed, and the water channel upstream side 2 a to the water downstream side 2.
The discharge to b is stopped, and the rise in water level on the downstream side 2b of the water channel is suppressed.

The present invention is not limited to the above embodiment of the present invention, and it is needless to say that various modifications can be made without departing from the spirit of the present invention.

[0062]

As is apparent from the above description, according to the upstream and downstream water level adjusting mechanism of the automatic water level adjusting gate according to the first aspect of the present invention, the arm is connected to the rotating shaft provided horizontally above the water channel. A radial gate that is connected and pivots up and down to open and close the water channel is installed facing the upstream of the water channel, a water weight chamber is provided on the side of the radial gate, and an upstream water chamber and a downstream side are provided in the water weight chamber. Providing a water chamber and a float chamber, providing an upstream communication path that communicates the upstream water chamber and the water channel upstream, and providing an intermediate communication path that communicates the downstream water chamber and the float chamber at a required height or higher, A downstream communication path communicating the float chamber and the downstream of the water channel is provided, and a float that rises and falls according to a change in the water level within a predetermined water level range is provided in the float chamber, and the float is raised and lowered in the upstream water chamber. Overflow with overflow that rises and falls in conjunction A water pipe is provided, a water weight having a water chamber therein is provided in the downstream water chamber, one end of a flexible introduction passage is connected to a lower portion of the water weight, and the other end is connected to the overflow water pipe, By providing a drain throttle at the lower part of the weight, when the water level on the upstream side of the channel fluctuates, the difference in water level between the upstream side of the channel and the downstream side of the channel is used to increase or decrease the weight of the water weight due to the water introduced from the upstream side of the channel. The automatic opening and closing of the radial gate allows you to adjust the water level,
When the water level fluctuates downstream of the waterway, the overflow of the overflow water conduit is raised and lowered in conjunction with the rise and fall of the float in the float chamber.
The water level can be adjusted by opening and closing the radial gate by increasing or decreasing the water weight of the water weight due to the water introduced from the upstream of the waterway.If the water level on the downstream side of the waterway drops, the water on the upstream side of the waterway is moved to the downstream side of the waterway. Replenishment can suppress lowering of the water level on the downstream side of the waterway, and when the water level on the downstream side of the waterway rises, stop replenishment from the upstream side of the waterway to the downstream side of the waterway to suppress the rise of the water level on the downstream side of the waterway. be able to.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view showing an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Radial gate 2 Waterway 2a Waterway upstream side 2b Waterway downstream side 3 Door body 4 Arm 5 Rotating shaft 6 Bearing 7 Weight arm 8 Counter weight 9 Water weight chamber 9a Middle partition 9b Middle partition 10 Upstream water chamber 10a Upstream communication path 10b Upstream inlet 11 Downstream water chamber 11a Intermediate communication path 11b Discharge tube 11c Intermediate outlet 12 Float chamber 12a Downstream communication path 12b Downstream outlet 13 Overflow port 13a Overflow cylinder 13b Overflow water conduit 14 Water weight 14a Flexible introduction passage 14b Drain restrictor 15 Float 15a Upper limit stopper 15b Lower limit stopper 16 Float overflow interlocking mechanism 16a Main wire rope 16b Wire sheave 16c Winding drum 16d Weight 16e Suspended wire rope 17 Water weight rotating shaft 18 Water weight arm

 ────────────────────────────────────────────────── ─── Continued on front page (72) Inventor Tatsu Honda 4541 Matsuyama-cho, Uto-shi, Kumamoto Nishida Iron Works Co., Ltd. In-house F-term (reference) 2D019 AA47 CA12

Claims (1)

[Claims] 1. A radial gate, which is connected to a rotating shaft provided above a waterway via an arm and turns around vertically to open and close the waterway, is installed facing the upstream of the waterway, and A water weight chamber is provided on the side, an upstream water chamber, a downstream water chamber, and a float chamber are provided in the water weight chamber, and an upstream communication path communicating the upstream water chamber with the upstream of the water channel is provided. An intermediate communication path communicating the chamber with the float chamber at a required height or higher is provided, and a downstream communication path communicating the float chamber with the downstream side of the water channel is provided, and a water level fluctuation within a predetermined water level range is provided in the float chamber. Providing a float that rises and falls following the water, an overflow water conduit having an overflow port that rises and falls in conjunction with the rise and fall of the float is provided in the upstream water chamber, and water that has a water chamber inside the downstream water chamber is provided. A weight is provided, and a flexible introduction passage is provided below the water weight. One end of the channel is connected and the other end is connected to the overflow water conduit, and a drain throttle is provided below the water weight.When the water level on the upstream of the channel fluctuates, the difference in water level between the upstream of the channel and the downstream of the channel is used. The radial gate is opened and closed by increasing or decreasing the water weight of the water weight due to the water introduced from the upstream of the waterway, and when the water level on the downstream side of the waterway changes, the overflow of the overflow water transmission pipe interlocks with the rise and fall of the float in the float chamber. An upstream / downstream water level control mechanism for an automatic water level control gate, which raises and lowers the mouth and opens and closes the radial gate by increasing or decreasing the weight of the water weight due to water introduced from the upstream side of the water channel.