JP2002021051A - Over-response preventing mechanism for automatic water level adjusting gate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent hunting phenomenon due to over-response of water weight by delaying the increase or decrease of water weight which opens or closes a radial gate. 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 and a downstream side water chamber 11 are arranged at the side of the radial gate, an upstream side communicating tube 10a communicating the upstream side water chamber to the upstream side of water channel is provided, a downstream side communicating pass 11a communicating the downstream water chamber and a water channel downstream side 2b above the required height is provided, an overflow water conveyance tube 12b having an overflow hole 12 through which water overflows and flows-in when the water level at the upstream side of the water channel reaches a predetermined water level is provided inside the water chamber at the upstream side, a water weight 13 having a water chamber in the downstream side water chamber is provided, the water chamber of the water weight is made of a double chamber construction comprising a first tank 13a and a second tank 13b, a damper nozzle 13c is provided in the communicating tube between the first tank and the downstream side water chamber, one end of a flexible conveyance tube 13d is connected to a bottom portion of the second tank and the other end is connected to the overflow water conveyance tube, and a drain throttle portion 13e provided at the bottom portion of the second tank.

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, and in particular, utilizing a water level difference between an upstream side of a waterway and a downstream side of the waterway. Automatic water level control to prevent the water weight from over-responding by delaying the increase / decrease of the water weight of the water weight that opens / closes the radial gate in the mechanism that opens and closes the radial gate by increasing / decreasing the water weight of the water weight due to the water introduced from the upstream of the waterway The present invention relates to a gate over-response prevention mechanism.

[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 have created a water level control gate that can be opened and closed in the middle.

[0003]

However, in a water level control gate having a structure in which the radial gate is automatically opened and closed using the above-mentioned water weight whose weight increases and decreases, the water level change between the upstream side of the waterway and the downstream side of the waterway. The hunting phenomenon may be caused by the over-response of the increase or decrease of the water weight of the water weight.

[0004] In view of the above problems, the present invention has been made to solve the problems, and an object of the present invention is to utilize a water level difference between an upstream of a water channel and a downstream of a water channel. In the mechanism that opens and closes the radial gate by increasing or decreasing the weight of the water weight due to the water introduced from the upstream of the water channel, the hunting phenomenon due to overresponse of the water weight is prevented by delaying the increase or decrease of the water weight of the water weight that opens and closes the radial gate It is an object of the present invention to provide a mechanism for preventing over-response of an automatic water level adjusting gate.

[0005]

In order to achieve the above-mentioned object, the invention according to the first aspect of the present invention relates to a rotating shaft which is provided horizontally above a water channel via an arm and which rotates 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 and a downstream water chamber are provided in the water weight chamber, and an upstream communication path communicating the upstream water chamber and the upstream of the water channel is provided. Providing a downstream communication passage that communicates the water chamber and the downstream of the water channel at a required height or more, and an overflow port that overflows and flows into the upstream water chamber when the water level on the upstream side of the water channel reaches a predetermined water level. A water weight having a water chamber is provided in the downstream water chamber, and a water chamber inside the water weight is provided as a first water chamber.
A double structure consisting of a tank and a second tank, a damper nozzle is provided in a communication passage between the first tank of the water weight and the downstream water chamber, and one end of a flexible introduction passage is provided below the second tank of the water weight. And a means for connecting the other end to the overflow water conduit and providing a drainage restricting portion below the second tank of the water weight.

According to a second aspect of the present invention, there is provided a radial gate which is connected to a rotating shaft provided above a waterway via an arm and turns vertically to open and close the waterway toward the upstream of the waterway. Installed, a water weight chamber is provided on the side of the radial gate, an upstream water chamber and a downstream water chamber are provided in the water weight chamber, and an upstream communication path communicating the upstream water chamber and the upstream of the water channel is provided. A downstream communication path that communicates the downstream water chamber and the downstream of the water channel at a required height or higher, and when the water level on the upstream side of the water channel reaches a predetermined water level in the upstream water chamber, An overflow water conduit having an outlet is provided, a water weight having a water chamber is provided inside the downstream water chamber, and the water chamber inside the water weight has a double structure including a first tank and a second tank, A damper nozzle is provided in the communication passage between the first tank and the second tank for the water weight, and The other end is connected to one end of the flexible introduction passage at the bottom of the 2 tank connected to the overflow water flow conduit is made from means for providing drainage aperture portion at the bottom of the second tank of water weight.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically based on embodiments of the invention shown in the drawings.

[Embodiment 1] Here, FIG. 1 is a sectional side view, FIG. 2 is a plan view, FIG. 3A is a plan sectional view of a water weight, and FIG. 3B is a sectional side view of a water weight. FIG. 3 (C) is a front view of the water weight, FIG. 3 (D) is a partially enlarged sectional view of a main part of the water weight, and FIG. 4 is an operation explanatory view.

In the figure, a radial gate 1 installed in a water channel 2 has a function of turning up and down to open and close the water channel 2 and to discharge or block the flow of water. Radial gate 1
Is installed toward the upstream side 2a of the water channel. The radial gate 1 includes a door 3, an arm 4, a rotating shaft 5, and the like.

The door 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 serving as a turning center of the radial gate 1 which turns up and down to open and close the water passage 2, is provided horizontally above the water passage 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 reduce the weight of the door body 3 when the door body 3 is turned around 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.

A water weight chamber 9 is provided on one side of the water channel 2 in which the radial gate 1 is installed. The water weight chamber 9 is partitioned by an intermediate partition 9a into an upstream water chamber 10 communicating with the upstream channel 2a and a downstream water chamber 11 communicating with the downstream channel 2b.

The upstream water chamber 10 is connected to an upstream communication passage 10a communicating 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 1
0b, 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 12a having an overflow port 12 at a position slightly lower than a predetermined water level on the upstream side 2a of the water channel. When sand or the like is mixed in the inflowing water, the overflow 12 prevents the sand or the like from flowing in with the water by causing the water on the water surface side of the upstream water chamber 10 to overflow.

The overflow cylinder 12a is attached to the upper end of the overflow water conduit 12b so as to be able to move up and down, and is fixed at a predetermined position. The overflow cylinder 12a is provided with, for example, a screw (not shown). The overflow port 1 is located at a position slightly lower than a predetermined water level.
2 is adjusted to come.

An overflow water conduit 12b having an overflow cylinder 12a mounted on the upper end so as to be able to move up and down is vertically installed inside the upstream water chamber 10, and the lower end of the overflow water conduit 12b is connected to the upstream water passage. It extends to the lower side of the chamber 10, extends laterally therefrom, penetrates the partition 9 a, and communicates with a water weight 13 provided in the downstream water chamber 11.

The downstream water chamber 11 is connected to a downstream communication passage 11a which communicates with the water passage downstream 2b. The downstream communication passage 11a has, for example, one end connected to a downstream outlet 11b opened on the channel side wall 2b on the downstream side of the channel, and the other end opened to a required height in the downstream water chamber 11. The other end of the downstream communication passage 11a may be connected and opened at a required height, and the downstream outlet 11b may be opened at a lower position.

The water level of the downstream water chamber 11 is the same as the water level of the downstream water channel 2b through the downstream communication passage 11a when the water level of the downstream water channel 2b is higher than a required height. If the water level is below the required height, maintain the required water level.

A water weight 13 is provided in the downstream water chamber 11. The inside of the water weight 13 is a hollow water chamber, and the weight of the water weight 13 is adjusted by introducing water from the water passage upstream side 2a into the hollow water chamber.

The hollow water chamber inside the water weight 13 has a double structure including a first tank 13a and a second tank 13b. The second tank 13 is provided on both left and right sides of the first tank 13a.
b is formed so as to sandwich the first tank 13a, the first tank 13a is an inner tank, and the second tank 13b is an outer tank. The left and right second tanks 13b communicate with each other.

A damper nozzle 13c is provided in a communication passage between the first tank 13a serving as an inner tank and the downstream water chamber 11. The damper nozzle 13c serves as a resistance to flowing water at the time of flowing in and out of the water to prevent smooth movement of the water, delay the water, and perform a function of slowly moving the water. Damper nozzle 13c
Is provided at the center of the bottom of the first tank 13a serving as the inner tank. The first tank 13a and the downstream water chamber 11 communicate with each other via the damper nozzle 13c.

In the lower part of the second tank 13b of the water weight 13, a flexible introduction passage 13 capable of following the fluctuation of the water weight 13 is provided.
One end of d is connected. The other end of the flexible introduction passage 13d is connected to the overflow water conduit 12b.

The second tank 13b of the water weight 13 includes a flexible introduction passage 13d, the overflow water conduit 12b, and an overflow cylinder 12b.
a, overflow port 12, upstream water chamber 10, upstream communication path 10a
In addition, it communicates with the upstream of the water channel 2a through the upstream inlet 10b, so that water from the upstream of the water channel 2a can be introduced.

Further, a drainage narrowing portion 13e for discharging the internal water to the downstream water chamber 11 is provided below the second tank 13b of the water weight 13. Further, an air hole (not shown) is formed in the upper part of the water weight 13.

The water level in the water weight 13 is higher than the water level in the downstream water chamber 11 by the amount of the head loss of the water flowing through the flexible introduction passage 13d and discharged through the drain restrictor 13e. Water is generated and becomes heavy.

A water weight rotation shaft 14 extending above the water weight chamber 9 is connected to one end of the rotation shaft 5 on the water weight chamber 9 side. It is coaxial with the driving shaft 5. Base ends of a water weight arm 15 are connected to both ends of the water weight rotation shaft 14, respectively.

The left and right water weight arms 15 are
Is extended toward the side opposite to the arm 4, and an upper side of a water weight 13 is hung at the end thereof. In other words, the water weight 13 is
It is installed to hang on.

The weight of the water weight 13 is transmitted to the rotation shaft 5 via the water weight arm 15 and the water weight rotation shaft 14, and is opposite to the rotation moment acting on the rotation shaft 5 by the weight of the door 3. A rotating moment is applied to the rotating shaft 5.

Next, the operation based on the configuration of the first 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 height, the upstream water chamber 10 communicating with the upstream side of the waterway 2a through the upstream side inlet 10b and the upstream side communication passage 10a. The water level fluctuates at the same level as the water level on the upstream side 2a of the waterway due to the water flowing from the upstream side 2a of the waterway through the upstream inlet 10b and the upstream communication path 10a.

When the water level of the upstream water chamber 10 fluctuates at the same height as the water level of the water channel upstream 2a due to the water flowing from the water channel upstream 2a, the overflow cylinder 1 provided in the upstream water chamber 10 is provided.
Since the overflow port 12a of 2a 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 side from the water surface of the upstream water chamber 10 through the overflow port 12 are provided. Water on the upstream side 2a of the water channel flowing through the communication 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 12, flows from one end of the flexible introduction passage 13d to the downstream side through the overflow cylinder 12a, the overflow water conduit 12b, and the flexible introduction passage 13d. The water weight 13 provided in the water chamber 11 flows into a second tank 13b which constitutes an outer tank. The water weight 13 flows into the second tank 13b utilizing the difference in water level.

The inflow of water from the waterway upstream 2a into the second tank 13b of the water weight 13 is caused by the water level in the second tank 13b of the water weight 13 being the same as that of the waterway upstream 2a.
The operation is performed until the water level becomes equal to 0, but the water weight 13
A drainage restrictor 13e is provided below the second tank 13b. For this reason, a part of the water that has flowed into the second tank 13b of the water weight 13 is discharged into the downstream water chamber 11 through the drain restrictor 13e.

In the second tank 13b of the water weight 13, the drain weight 13e causes the water weight 13 to be reduced by the amount of water loss.
The water level in the second tank 13b becomes higher than that in the downstream water chamber 11, and water weight is generated in the water weight 13 and starts to descend.

At this time, the first tank 13a of the water weight 13
Communicates with the downstream water chamber 11 through the damper nozzle 13c, the water surface of the first tank 13a is the same as the water surface of the downstream water chamber 11, and even if the water weight 13 becomes heavy and descends, the damper nozzle The water in the downstream water chamber 11 does not flow smoothly into the first tank 13a due to the flowing water resistance 13c.

For this reason, the water surface of the first tank 13 a of the water weight 13 that has become heavy and descends becomes lower than the water surface of the downstream water chamber 11 by λ. When the water surface of the first tank 13a is lower than the water surface of the downstream water chamber 11 by λ, the first tank 1
An upward buoyancy is generated by the volume corresponding to the height of λ of 3a, and acts in a direction to prevent the water weight 13 from dropping excessively, thereby preventing the water weight 13 from dropping excessively. .

A damper nozzle 13 is provided in the first tank 13a of the water weight 13 which is lower than the water surface of the downstream water chamber 11.
c, the water in the downstream water chamber 11 gradually flows in, so that the water level difference between the water surface of the downstream water chamber 11 and the water surface of the first tank 13a is gradually eliminated, and finally the downstream water chamber The water surface 11 and the water surface of the first tank 13a become the same, and the buoyancy acting in the direction that prevents the water weight 13 from descending disappears.

As described above, the water weight 13 is gradually lowered by the water weight generated in the water weight 13 while preventing the water weight 13 from being excessively lowered, and the distal end of the water weight arm 15 for suspending the water weight 13. Pull down. For this reason, a clockwise rotational moment acts on the water weight rotation shaft 14 to which the base end of the water weight arm 15 is connected. The turning moment acting on the water weight turning shaft 14 also acts on the turning shaft 5 which is 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 13 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, the discharge amount increases, and the water level rise on the upstream side 2 a of the water channel is prevented. Is done.

It should be noted that the drainage restrictor 1
The water discharged into the downstream water chamber 11 through 3e is stored in the downstream water chamber 11 when the water levels of the downstream water chamber 11 and the water passage downstream 2b are below the required height, Room 1
The water level of 1 rises. Then, when the water level in the downstream water chamber 11 reaches a required height, the water is discharged to the water downstream 2b through the downstream communication passage 11a and the downstream outlet 11b.

On the other hand, when the water level on the upstream side 2a of the water channel decreases, the water chamber 10 on the upstream side also decreases at the same water level, and flows from the overflow port 12 in the upstream water chamber 10 into the overflow cylinder 12a. The overflow / inflow water decreases, the water in the second tank 13b of the water weight 13 flowing through the overflow port 12, the overflow cylinder 12a and the flexible introduction passage 13d also decreases, and the water weight of the water weight 13 also decreases. decrease. The water weight 13 whose water weight has been reduced becomes lighter and starts to rise.

At this time, the first tank 13a of the water weight 13
Communicates with the downstream water chamber 11 through the damper nozzle 13c, the water surface of the first tank 13a is the same as the water surface of the downstream water chamber 11, and even if the water weight 13 is lightened and raised, the damper nozzle 1st tank 1 due to flowing water resistance of 13c
The water in 3 a does not flow smoothly into the downstream water chamber 11.

For this reason, the water surface of the first tank 13 a of the water weight 13 that has been lightened and raised becomes higher than the water surface of the downstream water chamber 11 by λ. Then, when the water surface of the first tank 13a is higher than the water surface of the downstream water chamber 11 by λ, the first tank 1
A downward force is generated by a water weight of a volume corresponding to the height of λ of 3a, and acts in a direction to prevent the water weight 13 from rising excessively, thereby preventing the water weight 13 from rising excessively. be able to.

From the first tank 13a of the water weight 13, which is higher than the water surface of the downstream water chamber 11, the damper nozzle 1
Since the water gradually flows into the downstream water chamber 11 through 3c, the water level difference between the water surface of the downstream water chamber 11 and the water surface of the first tank 13a is gradually eliminated, and finally the downstream water chamber 11 And the water surface of the first tank 13a becomes the same, and the force acting in the direction that hinders the rise of the water weight 13 disappears.

As described above, the water weight 13 gradually rises due to the weight of the water weight 13 while preventing the water weight 13 from excessively rising. Therefore, the water weight arm 15 and the water weight rotating shaft 1 are driven by the water weight of the water weight 13.
The clockwise rotational moment acting on the rotating shaft 5 via 4 is also reduced. 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 3 is equal to the water weight 1.
3 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 pivots counterclockwise, that is, downwards around the rotation shaft 5, whereby the water channel 2 is closed, the discharge amount is reduced, and the water channel upstream side 2 a
Water level is prevented from lowering. In this way, the water level on the upstream side 2a of the water channel is kept substantially constant.

[Embodiment 2] Here, FIG. 5A is a plan sectional view of the water weight, FIG. 5B is a side sectional view of the water weight, and FIG. 5C is a front view of the water weight. FIG. 5D is a partially enlarged sectional view of a main part of the water weight, and FIG. 6 is an operation explanatory view.

The second embodiment differs from the first embodiment in the double structure inside the water weight 21. In connection with this, the mounting position of the damper nozzle 21c is also different. The other configuration is the same as that of the first embodiment, and the description is omitted.

That is, the hollow water chamber inside the water weight 21 has a double structure consisting of the first tank 21a and the second tank 21b. The second side is provided on the side and the lower side of the first tank 21a.
The tank 21b is formed so as to surround the first tank 21a,
The first tank 21a is an inner tank, and the second tank 21b is an outer tank.

A damper nozzle 21c is provided in a communication passage between the first tank 21a serving as an inner tank and the second tank 21b serving as an outer tank. The damper nozzle 21c serves as a resistance to flowing water when flowing in and out of the water to prevent smooth movement of the water, delay the water, and perform a function of slowly moving the water. The damper nozzle 21c is provided at the bottom center of the first tank 21a serving as an inner tank. The first tank 21a and the second tank 21b communicate with each other via the damper nozzle 21c.

In the lower part of the second tank 21b of the water weight 21, a flexible introduction passage 21 which can follow the fluctuation of the water weight 21 is provided.
One end of d is connected. The other end of the flexible introduction passage 21d is connected to the overflow water conduit 12b. Also,
At the lower part of the second tank 21 b of the water weight 21, there is provided a drainage restricting portion 21 e for discharging the internal water to the downstream water chamber 11.

Next, the operation based on the configuration of the second 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 height, the upstream water chamber 10 communicating with the upstream side of the waterway 2a through the upstream side inlet 10b and the upstream side communication passage 10a. The water level fluctuates at the same level as the water level on the upstream side 2a of the waterway due to the water flowing from the upstream side 2a of the waterway through the upstream inlet 10b and the upstream communication path 10a.

When the water level of the upstream water chamber 10 fluctuates at the same height as the water level of the water channel upstream 2a due to the water flowing from the water channel upstream 2a, the overflow cylinder 1 provided in the upstream water chamber 10 is provided.
Since the overflow port 12a of 2a 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 side from the water surface of the upstream water chamber 10 through the overflow port 12 are provided. Water on the upstream side 2a of the water channel flowing through the communication 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 12, flows from one end of the flexible introduction passage 21d to the downstream side through the overflow cylinder 12a, the overflow water conduit 12b, and the flexible introduction passage 21d. The water weight 21 provided in the water chamber 11 flows into the second tank 21b constituting the outer tank. The water weight 21 flows into the second tank 21b using the difference in water level.

The inflow of water from the waterway upstream 2a into the second tank 21b of the water weight 21 is caused by the water level in the second tank 21b of the water weight 21 being the same as that of the waterway upstream 2a.
The process is performed until the water level becomes equal to 0, but the water weight is 21
A drain restrictor 21e is provided below the second tank 21b. For this reason, a part of the water that has flowed into the second tank 21b of the water weight 21 is discharged into the downstream water chamber 11 through the drain throttle 21e.

In the second tank 21 b of the water weight 21, the water weight 21 is reduced by the drainage head 21 e by the amount of head loss.
The water level in the second tank 21b becomes higher than that in the downstream water chamber 11, and the water weight 21 is generated and becomes heavy and starts to descend.

At this time, the first tank 21a of the water weight 21
Communicates with the second tank 21b through the damper nozzle 21c, the water surface of the first tank 21a just before the water weight 21 descends is the same as the water surface of the second tank 21b,
a into the second tank 21b, the water surface of the second tank 21b
Even when the height of the damper nozzle 21 becomes higher than the water level of the tank 21a,
c, the water in the second tank 21b is removed from the first tank 21b.
It does not flow smoothly into a.

For this reason, the first of the descending water weights 21
The water surface of the tank 21a is lower than the water surface of the second tank 21b by λ. When the water surface of the first tank 21a is lower than the water surface of the second tank 21b by λ, the water weight 21 becomes lighter by the volume corresponding to the height of λ of the first tank 21a, and the water weight 21 becomes excessive. Is prevented from falling.

The first tank 21a, which is lower than the water surface of the second tank 21b of the water weight 21, has a damper nozzle 21c.
The water in the second tank 21b gradually flows in through
The water level difference between the water surface of the second tank 21b and the water surface of the first tank 21a is gradually eliminated, and finally the water surface of the second tank 21b and the water surface of the first tank 21a become the same, and the water weight 21 The force acting in the direction that prevents descent disappears.

As described above, the water weight 21 is gradually lowered by the weight of water generated in the water weight 21 while preventing the water weight 21 from excessively lowering, and the distal end of the water weight arm 15 for suspending the water weight 21. Pull down. For this reason, a clockwise rotational moment acts on the water weight rotation shaft 14 to which the base end of the water weight arm 15 is connected. The turning moment acting on the water weight turning shaft 14 also acts on the turning shaft 5 which is coaxial therewith.

In addition to this, a counterclockwise rotating moment always acts on the rotating shaft 5 by the counterweight 8, and a clockwise rotating moment acting on the rotating shaft 5 by the water weight 21 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, the discharge amount increases, and the water level rise on the upstream side 2 a of the water channel is prevented. Is done.

It should be noted that the drainage narrowing portion 2
The water discharged into the downstream water chamber 11 through 1e is stored in the downstream water chamber 11 when the water levels of the downstream water chamber 11 and the water passage downstream 2b are below the required height, Room 1
The water level of 1 rises. Then, when the water level in the downstream water chamber 11 reaches a required height, the water is discharged to the water downstream 2b through the downstream communication passage 11a and the downstream outlet 11b.

On the other hand, when the water level on the upstream side 2a of the water channel decreases, the upstream water chamber 10 also lowers at the same water level, and flows from the overflow port 12 in the upstream water chamber 10 into the overflow cylinder 12a. The overflow / inflow water decreases, the water in the second tank 21b of the water weight 21 flowing through the overflow port 12, the overflow cylinder 12a and the flexible introduction passage 21d also decreases, and the water weight of the water weight 21 also decreases. decrease. The water weight 21 having reduced water weight becomes lighter and starts to rise.

At this time, the first tank 21a of the water weight 21
Communicates with the second tank 21b through the damper nozzle 21c, the water surface of the first tank 21a is the same as the water surface of the second tank 21b, the water surface of the second tank 21b is lowered, and the water weight 21 becomes lighter. Damper nozzle 2
The water in the first tank 21a does not flow smoothly into the lowered second tank 21b due to the flowing water resistance 1c.

For this reason, the water surface of the first tank 21a of the water weight 21, which has been lightened and raised, becomes higher than the water surface of the second tank 21b by λ. And the water surface of the first tank 21a is the second
When it becomes higher than the water surface of the tank 21b by λ, the first tank 21a
A downward force is generated by a water weight of a volume corresponding to the height of λ, and works in a direction to prevent the water weight 21 from rising excessively, thereby preventing the water weight 21 from rising excessively. Can be.

From the first tank 21a, which is higher than the water surface of the second tank 21b of the water weight 21, the damper nozzle 21
c, the water gradually flows into the second tank 21b.
The water level difference between the water surface of the second tank 21b and the water surface of the first tank 21a is gradually eliminated, and finally the water surface of the second tank 21b and the water surface of the first tank 21a become the same, and the water weight 21 The force acting in the direction that hinders the ascent is extinguished.

As described above, the water weight 21 gradually rises by the weight of the water weight 21 while preventing the water weight 21 from excessively rising. For this reason, the water weight arm 15 and the water weight rotating shaft 1
The clockwise rotational moment acting on the rotating shaft 5 via 4 is also reduced. 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
When the clockwise rotation moment acting on the rotating shaft 5 by the counterweight 1 and the counterweight 8 becomes larger, the rotating shaft 5
The door body 3 connected via the arm 4 pivots counterclockwise, that is, downwards around the rotation shaft 5, whereby the water channel 2 is closed, the discharge amount is reduced, and the water channel upstream side 2 a
Water level is prevented from lowering. In this way, the water level on the upstream side 2a of the water channel is kept substantially constant.

It should be noted that 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. For example, in the above-described embodiment, the case where the first tank is the inner tank and the second tank is the outer tank has been described, but this may be reversed.

[0072]

As is apparent from the above description, according to the over-response prevention mechanism of the automatic water level adjusting gate according to the first aspect of the present invention, the automatic water level adjusting gate is connected to the rotating shaft provided above the water channel via the arm. A radial gate that 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 water chamber are provided in the water weight chamber. Chamber, an upstream communication path communicating the upstream water chamber and the upstream of the water channel is provided, and a downstream communication path communicating the downstream water chamber and the downstream of the water channel at a required height or more is provided. When the water level on the upstream side of the water channel reaches a predetermined water level in the side water chamber, an overflow water conduit having an overflow port for overflowing / inflow is provided, and a water weight having a water chamber inside the downstream water chamber is provided, The water chamber inside the water weight has a double structure consisting of a first tank and a second tank, A damper nozzle is provided in a communication passage between the first tank of the weight and the downstream water chamber, one end of a flexible introduction passage is connected to a lower portion of the second tank of the water weight, and the other end is connected to the overflow water conduit. By providing a drainage throttle at the lower part of the second tank of the water weight, the difference in water level between the upstream side of the waterway and the downstream side of the waterway is used to increase or decrease the weight of the water weight due to the water introduced from the upstream side of the waterway. Open and close the radial gate,
Due to the flow resistance of the damper nozzle, an increase or decrease in the water weight of the water weight can be delayed to prevent an overresponse of the water weight, thereby preventing a hunting phenomenon due to an overresponse of the water weight.

Further, according to the over-response prevention mechanism for the automatic water level adjusting gate according to the second aspect of the present invention, the automatic water level adjusting gate is connected via a arm to a rotating shaft horizontally provided above the water channel, and rotates vertically. A radial gate for opening and closing the water channel is installed facing the water channel upstream side, a water weight chamber is provided on the side of the radial gate, an upstream water chamber and a downstream water chamber are provided in the water weight chamber,
An upstream communication path is provided for communicating the upstream water chamber with the upstream of the water channel, and a downstream communication path is provided for communicating the downstream water chamber and the downstream of the water channel at a required height or higher. When the water level on the upstream side of the water channel reaches a predetermined water level, an overflow water conduit having an overflow port for overflowing / inflow is provided, and a water weight having a water chamber is provided in the downstream water chamber, and the inside of the water weight is provided. The water chamber has a double structure consisting of a first tank and a second tank, and a damper nozzle is provided in a communication passage between the first tank and the second tank of the water weight, and a flexible member is provided below the second tank of the water weight. One end of the introduction passage is connected, the other end is connected to the overflow water conduit, and a drainage throttle is provided at the lower part of the second tank of the water weight, so that the difference in water level between the upstream side of the waterway and the downstream side of the waterway is used. Opening and closing the radial gate by increasing or decreasing the weight of the water weight due to the water introduced from the upstream of the waterway , The water flow resistance of the damper nozzle delays the water weight-change of the water weight can be prevented excessive response of water weight, which makes it possible to prevent a hunting phenomenon due to excessive response of water weight.

[Brief description of the drawings]

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

FIG. 2 is a plan view showing Embodiment 1 of the present invention.

FIG. 3A is a cross-sectional plan view of a water weight according to the first embodiment of the present invention. (B) is a side sectional view of the water weight showing Embodiment 1 of the present invention. (C) is a front view of the water weight which shows Embodiment 1 of this invention. (D) is a partially enlarged cross-sectional view of a main part of the water weight, showing Embodiment 1 of the present invention.

FIG. 4 is an operation explanatory diagram showing Embodiment 1 of the present invention.

FIG. 5A is a cross-sectional plan view of a water weight according to a second embodiment of the present invention. (B) is a side sectional view of the water weight showing the embodiment 2 of the present invention. (C) is a front view of the water weight which shows Embodiment 2 of this invention. (D) is a partial enlarged sectional view of a main part of the water weight, showing Embodiment 2 of the present invention.

FIG. 6 is an operation explanatory view showing Embodiment 2 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 Counterweight 9 Water weight room 9a Middle partition 10 Upstream water room 10a Upstream communication passage 10b Upstream side Inlet 11 Downstream water chamber 11a Downstream communication path 11b Downstream outlet 12 Overflow port 12a Overflow cylinder 12b Overflow water conduit 13 Water weight 13a First tank 13b Second tank 13c Damper nozzle 13d Flexible introduction path 13e Drain throttle part 14 Water weight rotation axis 15 Water weight arm 21 Water weight 21a First tank 21b Second tank 21c Damper nozzle 21d Flexible introduction passage 21e Drain throttle part

 ────────────────────────────────────────────────── ─── 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 (2)

[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 and a downstream water chamber are provided in the water weight chamber, an upstream communication path communicating the upstream water chamber with the upstream of the water path is provided, and a downstream water chamber and a water path are provided. A downstream communication path communicating with the downstream side at a required height or more is provided, and an overflow water inlet having an overflow port for overflowing and flowing into the upstream water chamber when the water level on the upstream side of the water channel reaches a predetermined water level. A water pipe is provided, a water weight having a water chamber therein is provided in the downstream water chamber, and the water chamber inside the water weight has a double structure including a first tank and a second tank. A damper nozzle is provided in the communication passage with the downstream water chamber, and the water weight is flexible below the second tank. One end of the introduction passage is connected and the other end is connected to the overflow water conduit, and a drainage throttle is provided at the lower part of the second tank of the water weight, and the waterway is utilized by utilizing the water level difference between the upstream side of the waterway and the downstream side of the waterway. The radial gate is opened and closed by the increase and decrease of the water weight of the water weight due to the water introduced from the upstream side, and the water resistance of the damper nozzle delays the increase and decrease of the water weight to prevent over-response of the water weight. Over-response prevention mechanism for automatic water level adjustment gate. 2. A radial gate, which is connected to a rotating shaft provided laterally above the water channel via an arm and rotates 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, an upstream water chamber and a downstream water chamber are provided in the water weight chamber, an upstream communication path communicating the upstream water chamber with the upstream of the water path is provided, and a downstream water chamber and a water path are provided. A downstream communication path communicating with the downstream side at a required height or more is provided, and an overflow water inlet having an overflow port for overflowing and flowing into the upstream water chamber when the water level on the upstream side of the water channel reaches a predetermined water level. A water pipe is provided, a water weight having a water chamber therein is provided in the downstream water chamber, and the water chamber inside the water weight has a double structure including a first tank and a second tank. A damper nozzle is provided in the communication passage with the second tank, and the water weight is introduced flexibly into the lower part of the second tank. One end of the passage is connected and the other end is connected to the overflow water conduit, a drainage throttle is provided at the lower part of the second tank of the water weight, and the upstream of the waterway is utilized by utilizing the water level difference between the upstream and downstream of the waterway. Opening and closing the radial gate by increasing or decreasing the weight of the water weight due to the water introduced from the side, and delaying the increase or decrease of the water weight of the water weight by the flow resistance by the damper nozzle prevents over-response of the water weight. Automatic water level adjustment gate overresponse prevention mechanism.