JP3427324B2 - Chain gate device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chain gate device having a door body constructed by using a chain in a gate provided for adjusting the water level or flow rate of a water channel.

[0002]

2. Description of the Related Art Conventionally, it has been desired to install an unmanned and unpowered automatic gate at a gate provided in a waterway due to problems such as maintenance work and maintenance costs after the facility. As an example, a gate installed in a large lowland creek
Since there may be several gutters and pump stations, it is necessary to distribute the water flow due to the flood. However, the drainage condition of each gutter and pumping station changes depending on the condition of the target river, and the condition of the river changes depending on the meteorological conditions, which is unpredictable. Also, loss of function due to power failure is not allowed. Therefore, manually operating the gate is a complicated operation and requires an excessive amount of labor. In recent years, the door of the gate has been installed in conjunction with a float floated in a water tank that draws water in the waterway, and the float moves up and down according to the displacement of the water level in the waterway (upstream), which raises and lowers the door. It is designed so that running water can be dammed appropriately.

Roller gates (including sluice gates without rollers; the same applies hereinafter) are included in gates having a structure in which running water flows under the door.
-See 326668) and radial gate (Japanese Patent Application No. 1)
-See 173532). That is, as shown in FIG. 15, the roller gate 1 is provided with a flat plate-shaped door body 2 so as to be able to move up and down across the water channel 3, and an operation chamber 5 in which a float 4 is arranged along the side wall of the water channel 3. . Operation room 5 two partition walls 5a, partitioned by 5b, and hydrostatic pool 7 which communicates via an upstream water passage inlet 6 to the door body 2, via the downstream side water passage and the outlet 8 to the door bodies 2 Reservoir 9 and static water reservoir 7 communicating with each other
And a float chamber 10 provided between the water reservoir 9 and the water reservoir 9.

A pilot valve 11 is provided in the still water reservoir 7, and a valve body 11a is connected to a pilot float 13 via a rod 12 so as to move up and down. The pilot float 13 is housed in a box-shaped pilot float chamber 14 having a water passage hole 14a on its lower surface, and is displaced following the water level of the still water reservoir 7. The still water pond 7 is a float chamber when the valve body 11a is on the upper side.
It communicates with 10, and when the valve element 11a is in a lower position, it communicates with the reservoir 9 through a water pipe 15. The partition wall 5b on the side of the basin 9 supports a water passage 15 whose opening is narrowed, and a drain pipe 16 which connects the float chamber 10 and the basin 9 is supported so that the downstream opening is narrowed. Has been.

The float 4 floated in the float chamber 10 has a hole 4a in its upper surface, and is connected to a water pipe 15 through a flexible pipe 17 at the upper part inside the float so that running water can be introduced.

The door body 2 and the float 4 are respectively hung on chains 21 wound around sprockets 19 and 20 provided on an interlocking shaft 18 provided above, so that the door body 2 interlocks with the float 4. . 22 and 23 are counterweights. This configuration operates so as to keep the upstream water level constant, and at the time of flooding, operates so as to raise the door body 2 to allow communication of running water.

On the other hand, the radial gate 24 shown in FIG.
An arm 25 is fixed in an upstream / downstream direction to an interlocking shaft 18 provided rotatably, an arcuate door body 26 is attached to the upstream end of the arm 25, and a counterweight 23 is attached to the downstream end of the arm 25. In addition, in the operation room 5, a water injection device 27 installed in the still water pond 7
To allow water to flow into the float chamber 10, the water in the float 4 is interlocked with the reservoir 9 (downstream water channel), and the float 4 is brought into contact with the watertight rubber 28 mounted inside the float chamber 10. ing. Then, it is operated via a rod 29 erected on the float 4 and an operation arm 30 fixed to the interlocking shaft 18. Also in this gate 24, the arm 25 is rotated to move the door body 26 up and down on the surface of water at the time of flood.

Besides, there is a fall weir at the gate where the running water overflows the upper part of the door. Overturned weirs (undulation weirs) are designed to overturn the weir body to the riverbed in order to establish communication of running water during floods, and a control device to achieve unmanned and unpowered water level balance is waiting for its appearance. By the way.

[0009]

In these general gates, the roller gate 1 requires a high and solid gatepost for mounting the sprockets 19 and 20, which causes problems of spoiling the natural landscape and increasing the construction cost. There is also a problem that the radial gate 24 needs a large area in the river in a plane, and the landscape is damaged. In addition, in the case of a fall weir, a large actuating force is required to maintain the standing posture against water pressure, so there is a problem that the drive device becomes large, and unmanned and unpowered are achieved. There are difficult challenges to do. Furthermore, in recent years, when aquatic plants flourish due to eutrophication of the water area, the lower layer of the stored water flows down to the more automated roller gates, etc. Surrounding problems are also occurring.

According to the present invention, the installation space is small and the construction is simple, the construction cost is low, the water is communicated at the time of flood, and the surrounding scenery is not spoiled and the water level or the flow rate is automatically adjusted. An object is to provide a chain gate device.

[0011]

In order to solve the above problems, the invention of claim 1 horizontally traverses the water surface of a waterway,
A plurality of suspension sprockets are fixed to a suspension shaft rotatably supported at intervals, and each chain is suspended by the plurality of suspension sprockets and hangs in water as a vertical girder. Direction of the door body formed in a watertight state between the cross girders by means of the cross girders fixedly attached to the upstream side across the links located in the direction, and upstream of the door body wound around the suspension sprocket. sides, the edges were supported by Tomizo provided in the channel sidewall, in conjunction with the rotation of the suspension shaft is provided vertically movably to the door body, or
In addition, the float floated in the float chamber communicating with the waterway,
The suspension via a drive chain that suspends the float
Was cooperative to the shaft, wound to the suspension sprockets the door
Front rails with appropriate slopes to support the downstream side of the body
It is characterized in that it is provided on the downstream side so as to be connected to the suspension sprocket .

Further, in order to solve the above-mentioned problems, a claim
In a second aspect of the invention, a suspension shaft horizontally traversing the water channel is rotatably supported in a door groove provided on a side wall of the water channel so as to be vertically movable, and a plurality of suspension sprockets are fixed to the suspension shaft at intervals. Chains suspended in the water as vertical girders suspended on the plurality of suspension sprockets, and laterally fixedly attached to the upstream side portion between the links horizontally positioned for each link of the plurality of chains. A door is formed by making the space between the horizontal girders watertight by the girder, and the upstream surface of the door is covered with a flexible shielding curtain, and the end of the upstream side of the door is more than the door groove. It is characterized in that it is attached to the upstream riverbed and the downstream end of the door body is held downward.

According to a third aspect of the invention, in the invention of the second aspect, a drive shaft is provided above the suspension shaft, and both ends of the suspension shaft are provided at one end of a suspension chain wound around the drive shaft. And a counterweight is hung at the other end of the suspension chain, and a float floated in a float chamber communicating with the water channel is hung on the drive chain wound around the drive shaft.

[0014]

Since the invention of claim 1 is constructed as described above, in the first means, the door body constituted by a plurality of cross girders passed between the chains becomes a door groove in water. It is supported and can gate the gate. Then, by rotating the suspension shaft, the suspension sprocket rotates, the chain is wound, and the door body can be pulled up while being bent, and the door body pulled up by the suspension sprocket can be folded and stored downstream. In addition, the running water will flow below the door body.

Further, since the end of the suspension shaft is supported by the side wall of the water channel, the operating force is not affected by the horizontal water pressure. Moreover, since the stringer (chain) receives the water pressure from the outside and keeps the straight state, the suspension sprocket is not pulled downward. Therefore, the force for rotating or raising and lowering the suspension sprocket is small.

Furthermore, float by moving up and down by the water level of the water channel, it is possible to raise and lower the door body can rotate suspension shafts. The door body wound around the suspension sprocket can be divided into an upstream side portion that hangs down and a downstream side portion that is supported by a rail, and the load on the downstream side portion can be applied to the rail to reduce the weight applied to the suspension sprocket. . On the other hand, if the inclination of the rail is appropriately adjusted, the influence of its own weight can be freely changed according to the opening degree.

Next, the invention of claim 2 is configured as described above.
Since the door body is composed of a plurality of cross beams, it can be bent, and when the position of the suspension shaft is appropriately raised, the door body stands up because the upstream end is anchored to the riverbed. It becomes a state. In water, even if the door body is bent by the suspension sprocket, the screen curtain can prevent water leakage. Further, since the periphery of the door body is provided in a watertight state with the riverbed and the side wall of the water channel, the flowing water overflows and flows downstream. When the suspension shaft is lowered along the doorway, the door body falls down. In addition, since water overflows above the door body, the flow of dust such as floating aquatic plants is not blocked, so even if the aquatic plants flourish due to eutrophication of the water area, the aquatic plants will flow downstream, causing flooding. It is possible to communicate with the water of time.

The invention of claim 3 is configured as described above.
Since it is intended to be, the vertical movement of the suspension shaft, the drive shaft is rotated via the drive chain by vertical movement of the float,
This is because the suspension chain wound around the drive shaft moves up and down. In addition, since the counterweight is suspended on the opposite side of the door body, it is not necessary to consider its own weight as the operating force, so that unmanned operation and powerless operation are easy. However, since the own weight cannot be changed according to the opening degree, it cannot be used as a force for closing the own weight, but a force for closing can be obtained by controlling the acting force transmitted from the float.

According to the invention of claim 2 or 3,
Since water overflows above the door, the inflow of suspended dust cannot be prevented. Therefore, it is not used for the purpose of making the downstream water level constant, but can be used when making the upstream and downstream water level differences constant.

[0020]

Embodiments of the present invention will be described below with reference to the accompanying drawings. First, a gate that discharges running water from below the door body to keep the upstream water level constant will be described. As shown in FIGS. 1 and 2, the gate 31 provided in the waterway 3 is provided with a suspension system.
Together constituted by location and door 33, the side wall 3a of the water channel 3
The operation room 5 is provided in the. A suspension shaft 32a of the suspension device is rotatably provided by being horizontally supported by bearings provided on both side walls 3a, and a plurality of suspension sprockets 34 are fixed to the suspension shaft 32a at appropriate intervals. Suspended sprocket on both sides
Two rails 35 are provided near the upper portion of the outer circumference of the rail 34, and extend upward in the downstream direction from the vicinity of the upper portion of the outer periphery thereof with a width smaller than the width of the water channel. Further, the portion near the downstream end of the rail 35 is formed with an opposite slope.

Further, below the upstream side of the suspension sprocket 34 is horizontal-force-bearing device provided on the side walls 3a, the horizontal force support
A roller 36c is supported by a vertical rail 36b in a door groove 36a of the device, the door groove 36a projects above the water surface, and a stopper 36d is provided at the upper end of the vertical rail 36b.

A chain 37 is suspended on each of the plurality of suspension sprockets 34. The door 33 is shown in FIGS.
As shown in FIG. 3, a vertical girder 39 composed of a plurality of chains 37 and a block 38 fixed to an outer portion of the link 37a of the chain 37, and a horizontal Z-shaped joining member 40 made of a thin plate is horizontally attached to each link 37a. The cross girder 41 is supported in the direction. Further, as the chains 37 at both ends of the door body 33, a roller chain with a collar is used, and the chains are assembled so that the collars are alternately arranged on the left and right. The length of the block 38 is made equal to the pitch of the chain 37, and the blocks 38 are crimped to each other so that the stringer 39 maintains a linear state. Further, is one of the water stop device on the upper end of each crossbeam 41, the head is fixed the water stop rubber 43 made of square P-type rubber, the base portion in contact with the stringer 39 is resected, also stopped The surface of the water rubber 43 matches the surface of the cross beam 41 in the compressed state.

A lower rubber 44, which is an L-shaped rubber, is fixed near the lower end of the horizontal girder 41 at the upstream end of the door 33, and the tip of the lower rubber 44 comes into close contact with the bottom surface of the water channel 3 in the fully closed state. ing. A side rubber 45 made of L-shaped rubber is fixed to the side wall of the water channel 3, and its tip is in close contact with the surface of the cross beam 41. Further, the end beam 46 is fixed to the link 37a at the upstream end, the rollers 36c that move up and down along the vertical rails 36b are attached to both ends of the end beam 46, and the pattern is provided at the downstream end of the door 33. A switching weight 47 is attached and supported by the rail 35.

As shown in FIGS. 1 and 2, the driven sprocket 49 of the interlocking device is fixed to one end of the suspension shaft 32a, and the driving sprocket is fixed to the drive shaft 51 of the driving device which is horizontally rotatably supported. An interlocking chain 53 runs around 52 and the driven sprocket 49 described above. In addition, the drive shaft 51 is driven
The sprocket 54 is fixed, the drive chain 55 is suspended on this, and the float 4 is suspended at the upstream end of the drive chain 55.
And the counterweight of the vertical force adjustment device at the downstream end
57 is suspended.

The water level to be dammed upstream is called the planned water level below, but the upper and lower water levels when the damming is stopped are set above and below the planned water level.

As for the inclination of the rail 35 on the upstream side, the difference in the closing force due to its own weight when the upstream water level is the upper limit water level and the downstream water level is the lower limit water level (hereinafter referred to as the weir limit state) is close to the fully closed state. It is determined so as to be proportional to the magnitude of the resistance, and the inclination of the downstream end of the rail 35 is reversely inclined.

Further, the door 33 is pulled up at the time of flood,
It becomes dormant automatically by its own weight. When the water level in the waterway 3 becomes low after the flood, the sealed part 4c below the float 4
Is exposed in the air, the door 33 is automatically pulled down, and the weiring is restarted. The weight of the counterweight 57 is adjusted so that the door body 33 descends when the water level in the float chamber 10 reaches the lower limit water level in the weir limit state.
The pattern switching weight 47 comes to come to the inflection point of the rail 35 in the above-mentioned weiring limit state.
Further, when the door 33 is in the resting state, its center of gravity comes to the downstream side, so that the roller 36c is pressed against the stopper 36d.

Next, the operation room 5 will be described with reference to FIG. It should be noted that the same reference numerals are given to those described in the related art. The watertight rubber 28 is composed of a pair of L-shaped rubbers, and the tip of the watertight rubber 28 projects upward and downward, and is in close contact with the peripheral wall of the float 4. The water in the water reservoir 9 is introduced into the water conduit 4b above the float 4 through the flexible pipe 17. The sealing portion 4c at the bottom of the float 4 is sealed,
The height of the upper end of the sealing portion 4c is sufficiently low so that the float 4 can rise to the rest state. Also,
The plane area of the float 4 is sufficiently large so that the door body 33 rises when the water level in the float chamber 10 reaches the upper limit water level. Further, the height of the sealing portion 4c is sufficiently large so that when the flood goes away, the pattern switching weight 47 is pulled up, the door 33 is lowered, and the gate 2 restarts the weiring. Further, the weight of the float 4 is sufficiently large so that it does not float up even when the maximum buoyancy is exerted. Further, the operating ratio is set so that the digging depth of the float chamber 10 is appropriately reduced, and according to the operating ratio,
The diameters of the driving sprocket 54, the driven sprocket 49, and the driving sprocket 52 are determined.

The water injection device 27 is a water injection tank 27 having a weir function.
a and a water injection pipe 27b, an outlet 58 having an orifice function is formed in the partition wall 5b on the side of the reservoir 9 and the upstream water channel 3b.
Communicates with the downstream water channel 3c via the water injection device 27, the float chamber 10 and the outlet 58. The size of the outlet 58 is the waterway 3.
The gate 31 is made large enough so that it does not delay in closing in accordance with the water reduction speed of the There is.

Next, the operation will be described. The upstream vertical girder 39 has the block 38 crimped against water pressure,
Since 37 is tense and linear, the head of the water blocking rubber 43 in the gap between the cross girders 41 is compressed. Further, in the fully closed state, the tip of the lower rubber 44 attached to the lowermost horizontal girder 41 is in close contact with the bottom surface of the water channel 3, and the surfaces of the horizontal girder 41 and the water blocking rubber 43 are aligned to each other, and The side rubber 45 fixed to the side wall 3a is pressure-bonded to the edge of the cross beam 41. Further, the vertical girders 39 may be slightly deformed due to wear of the block 38, but since the horizontal girders 41 are supported through the Z-shaped joining material 40 made of a thin plate, the vertical girders 39 are deformed. However, there is no unreasonable force applied to the cross beam 41. Further, since the force for rotating or raising and lowering the suspension sprocket 34 is small, the driving device can be downsized. Further, the door body 33 is bent to the downstream side when it is raised and is housed in the water channel, so that it can be stored in a small installation space, and the gate post that has been conventionally required is unnecessary.

Further, the inclination of the rail 35 is determined so that the closing force does not become excessively close to the fully closed state, and the float 4 has a sufficient function in the fully closed state. When the flow rate increases and the upstream water level becomes slightly higher than the planned water level, the overflow water depth on the water injection tank 27a increases. In addition, since the perimeter of the water injection tank 27a is sufficiently larger than the cross-sectional area of the outlet 58,
The amount of water flowing into the float chamber 10 significantly increases. On the other hand, the amount of outflow from the outflow port 58 is extremely insensitive to the rise of the water level, and therefore the water level in the float chamber 10 greatly rises due to a slight increase in the inflow amount. Therefore, since the float 4 moves up, the drive sprocket 54 and the drive shaft 51
Rotates, the suspension shaft 32a and the suspension sprocket 34 rotate via the interlocking device , and the door 33 rises.

Further, when the float 4 starts to rise, the resistance is large, but once the gate 31 starts moving, the resistance is drastically reduced. Therefore, the operating force acting on the float 4 largely moves until it is halved. Opened and closed too much,
There is a phenomenon called hunting that repeats opening and closing. The hunting phenomenon is a momentary movement, and the float 4 and the float chamber
Since the bottom surface of the float 4 and the water surface in the float chamber 10 are shut off by the watertight rubber 28 provided in the gap between the 10 water tanks, when the float 4 moves up and down very slightly,
The water surface inside 27a fluctuates greatly in the direction opposite to float 4,
Since the operating force of the float 4 rapidly disappears, the hunting phenomenon is prevented. If the gate 31 is opened as described above, the water level in the upstream water channel 3b becomes low, the overflow water depth on the water injection tank 27a decreases, and the rise of the water level in the float chamber 10 stops.
The float 4 stops and the rise of the door 33 stops.

If the flow rate increases remarkably and the downstream water level rises close to the planned water level, the water level difference between the upstream and downstream sides will decrease, so the rise in the water level in the float chamber 10 will be extremely small even if the upstream water level is too high. However, on the other hand, since the flow velocity under the door body 33 becomes small, the door body 33 has to largely move up in order to slightly lower the water level of the upstream water channel 33b. Therefore, there is a problem that the error of the water level tends to be large, but since the water in the downstream water channel 3c is introduced into the upper water guiding section 4b in the float 4, the float 4 discharges the water sufficiently, The large rise will avoid inaccurate upstream water levels.

Further, the plane area of the float 4 is determined so that the gate 31 is opened when the upstream water level is the upper limit water level and the downstream water level is the lower limit water level, that is, the weir limit state. In this state, since the pattern switching weight 47 is already at the inflection point of the rail 35, the door body faces the downstream side of the pattern switching weight 47.
33 pulling power increases. Therefore, the door on the upstream side
33 rises, but as it rises, the weight of the portion of the door body 33 suspended vertically to the upstream side decreases. Moreover, since the height of the sealing portion 4c of the float 4 is sufficiently low,
The float 4 rapidly rises with the door 33 while spitting out water, and the roller 36c is pressed against the stopper 36d,
Gate 2 remains dormant. Therefore, it does not hinder flood communication. As a result, the water level in the upstream water channel 3b drops to the same lower limit water level as in the downstream, but since it is the water level that was scheduled in advance, no problem will occur in water diversion.

When the flood disappears, the water level of the water channel 3 becomes low, and the sealing portion 4c of the float 4 is exposed in the air. Therefore, the weight of the water changes the door 33 on the steep slope on the downstream side of the rail 35 and the pattern switching. Weight 47 is raised. Further, if the water level in the float chamber 10 is equal to the downstream water level, the weight of the counterweight 57 is adjusted so that the gate 31 is closed securely even in the above limit weired state. As a result, the upstream door 33 is lowered.
At this time, the door 33 passes over the suspension sprocket 34, but the lengths of the watertight rubber 28 and the side rubber 45 are made sufficiently large so that the tips do not separate, so these devices can be turned over. Never. Further, the float 4 descends while attracting water. As described above, since the configured gate 31 is extremely advantageous in terms of cost, if the amount of floating dust is small,
This embodiment is optimal.

Next, as a second embodiment, a gate for keeping the downstream water level constant will be described. In the configuration in which the downstream water level is constant, the float 4 is suspended on the opposite side of the door 33 (see FIG. 6). Further, according to the conventional technique shown in FIG. 15, the operation chamber 5 is provided with the outlet 58 of the float chamber 10 above the pilot valve 11 and opened downward. The upper limit water level is set appropriately for the upstream water level, which is appropriately higher than the downstream water level to be maintained (hereinafter, the downstream water level is referred to as the planned water level in the second embodiment), and the spillway opening to the upstream water channel 3b is set. The height of the bottom surface of 3d corresponds to this upper water level. The operating ratio of the gate 2 and the float 4 is determined so that the height of the upper end of the closed portion 4c of the float 4 reaches the designed water level in the state where the flow rate is the highest.

The weight of the counterweight 57 is appropriately heavy so that the gate 31 can be surely opened if the water level in the float chamber 10 is equal to the downstream water level. Further, the plane area of the float 4 is sufficiently large so that the gate 31 can be closed surely if the water level in the float chamber 10 is equal to the upstream water level. Therefore, in the state where there is no water level difference between the upstream and the downstream, the gate 31 will be kept fully open,
The maximum opening is regulated by the stopper 36d provided in the door groove 36a so that the upstream water level becomes the upper limit water level when the downstream water level reaches the planned water level.

As shown in FIG. 7, the rod 12 is attached to the pilot float 13 of the pilot valve floated in the reservoir 9.
The valve body 11a is connected to the pilot float 13
Is stored in the pilot float chamber 14, and the pilot float chamber 14 communicates with the still water reservoir 7 through a small water passage hole 14a. The gap between the pilot float 13 and the pilot float chamber 14 is made as small as possible. A packing 11b is fixed to the rod 12 as required, which will be described later.

The other end of the T-shaped float chamber water level adjusting port 59 provided above the valve body 11a opens into the float chamber 10.
The upper opening is closed by the packing 11b. The inside of the float chamber 10 communicates with the static water reservoir 7 through a float chamber orifice 60 having a small hole. Further, the size of the float chamber orifice 60 is made sufficiently large in consideration of the rate of increase in water, and the cross-sectional area of the float chamber water level adjusting port 59 is such that the water level in the float chamber 10 will be increased if the adjusting port 59 is opened. It is made large enough compared to the orifice 60 so that it is almost equal to the downstream water level. The other structure is similar to that of the first embodiment.

Next, the operation will be described. If the amount of flow-down is small and the downstream water level is below the planned water level, the pilot float 13 and the valve body 11a descend, and the water level in the float chamber 10 is equal to the downstream water level.
c is crimped to the stopper 36d to keep it fully open. Therefore, in a state where the flow rate is small and the spillway 3d does not function, dust is not accumulated upstream of the gate 31. However, when the flow rate increases and the downstream water level reaches the planned water level, the opening degree of the gate 31 is regulated, so the upstream water level rises to the upper limit water level. Also, if the downstream water level becomes slightly higher than the planned water level, the pilot float 13 rises and the float chamber water level adjustment port 59 is closed, so the water level in the float chamber 10 rises to the upper limit water level, and the float 4 Is raised, the door 33 on the opposite side is lowered and the downstream water level is lowered.

When the pilot float 13 rises, there is a problem called hunting as in the float 4 of the first embodiment, but the gap with the pilot float chamber 14 is made as small as possible. For the same reason, the pilot float 13 solves the problem of hunting. As described above, if the downstream water level becomes low, the float chamber water level adjustment port 59 will be in a half-opened state.
The water level inside becomes a water level intermediate between the water levels upstream and downstream,
The door 33 is stationary. On the other hand, since the upstream water level rises due to the closing of the gate 31, the surplus water is discharged from the spillway 3d together with dust to the river.

When the flow rate decreases after the flood and the downstream water level becomes lower than the planned water level, the valve body 11a descends and the float chamber water level adjusting port 59 is opened, so the float chamber 10
The water level inside becomes equal to the downstream water level, and the gate 31 is fully opened. The gate 31 that keeps the downstream water level constant is limited to the case of taking water from a river or discharging excess water from the spillway 3d as described above, but if the flow rate is less than a predetermined amount, it is in a fully open state. Therefore, when taking water from a river, it is possible to take the entire diversion,
In the case of the spillway 3d, the dust is not stopped until the discharge of water from the spillway 3d begins, so the gate of this embodiment is most suitable for keeping the downstream water level constant.

Next, a third embodiment will be described. This is to overflow the door 33 and discharge the upstream running water to keep the upstream water level constant. When the upstream water level is constant, if the flow rate increases and the water level in the canal rises,
Since it is necessary to lay down the door body 33, the float 4
It is desirable to hang on the other side of 33. Therefore, the figure
As shown in FIG. 11, the outlet of the float 4 and the outlet of the float chamber 10 are formed above and below the valve body 11a, respectively.

Rollers 36c of a horizontal force supporting device are mounted on both ends of the suspension shaft 32a, and an upstream chain 37 is rotatably supported by an end girder 46, and the end girder 46 is embedded in the bottom surface of the water channel 3. There is. In the first embodiment, 4 has the water blocking rubber 43 provided between the horizontal girders 41, but in this embodiment, since it is bent by the suspension sprockets, the entire surface of the horizontal girder 41 is covered with a rubber curtain (blocking curtain) of the water blocking device. Covering with 61, near the upstream end and the downstream end of the rubber curtain 61 are fixed to the vertical girders 39 and the horizontal girders 41, and the side rubbers 45 are pressure-bonded to both ends of the rubber curtain 61. Further, the lower rubber 44 is configured such that the tip end thereof is pressed against the bottom surface of the water channel 3 when the door body 33 is completely erected, but the upstream surface of the door body 33 is appropriately inclined, If the door 33 falls down halfway, the lower rubber
The tip of 44 is configured to be separated from the bottom surface of the water channel 3.

Both ends of the suspension shaft 32a are suspended inside the roller 36c by a plate-shaped suspension metal object 63 of a suspension device provided in the door groove 36a, and the suspension metal object 63 is suspended by a suspension chain 64, 64 is suspended on a pair of suspension sprockets 65 fixed to the drive shaft 51. In this embodiment, the float 4 is suspended on the opposite side of the door body 33 in order to lower the door body 33 when the downstream water level rises. In order to separate the inflow port 6 of the still water pond 7 from the door body 33 as much as possible, the door body 33 is provided on the downstream side of the suspension sprocket 65, and a vertical force control device is provided.
The counterweight 57 of 56 is suspended on the upstream side.
The weight of the counterweight 57 is adjusted so that the door body 33 descends when the water levels in the float 4 and the float chamber 10 are the same.

The surface of the suspending hardware 63 is aligned with the surface of the side wall 3a of the water channel 3, and in consideration of the movement of the suspending chain 64 due to the rotation of the suspending sprocket 65, an appropriate space is provided between the door groove 36a and the suspending hardware 63. A gap of various sizes is provided, and the tip of the waterproof rubber 66 fixed to the back surface of the hanging metal 63 is pressed against the surface of the door groove 36a to close the gap, but it is lower than the upper end of the rubber curtain 61. In the portion, the width of the hanging hardware 63 is made as narrow as possible so that the air can be supplied below the door body 33 through the door groove 36a.

The pin 68 of the attitude holding device penetrates through the pin hole of the link 37a at the most downstream end of the chain 37 and projects inward and outward, and the roller 69 and the thimble 70 are mounted inside and outside the pin 68, respectively. Rope 71 fixed to thimble 70
The other end of is fixed to a fixing pin 73 via a fixing thimble 72. The position of the fixing pin 73 is determined so that the position of the downstream end of the door body 33 is on the downstream side of the lower side of the water vein that naturally drops at any height of the weir.

The drive chain 55 is suspended on a drive sprocket 54 fixed to the center of the float chamber 10 of the drive shaft 51, and the float 4 is suspended on the upstream side. The diameter of the drive sprocket 54 is made sufficiently smaller than that of the suspension sprocket 65, and the reason for this will be described in the section of action. The height of the upper end of the closed portion 4c of the float 4 is set to a height that matches the planned water level when the door 33 is completely laid down. Further, the door 33 and the float 4 are prevented so that the digging depth of the float chamber 10 does not become excessive.
The operating ratio of is determined.

Further, in this embodiment, as shown in FIG. 11, a pilot float 13 is provided in the still water reservoir 7, and the inside of the float 4 and the inside of the float chamber 10 face each other vertically with the valve body 11a interposed therebetween. T-shaped float water level adjustment port 74
And a float room water level adjustment port 59 is provided. The float water level adjusting port 74 is connected to the water pipe 15 that bypasses the float chamber 10, and communicates with the water reservoir 9 through the float orifice at the downstream end thereof, and in the float chamber 10, the water pipe 15 A flexible tube 17 branches off. Further, the float chamber 10 communicates with the reservoir 9 via the float chamber orifice 60. The upper and lower openings of the float water level adjusting port 74 and the float chamber water level adjusting port 59 are closed by the packing 11b.

Further, as shown in FIG. 9, a pit 75 for accommodating the suspension sprocket 34 is provided on the bottom surface of the water channel 3 directly below the suspension sprocket 34.

Next, the operation will be described. Air is supplied into the door body 33 through the door groove 36a, and negative pressure does not act on the lower surface of the door body 33, so that the float 4 can be made small. In addition, the position of the fixing pin 73 is determined so that the downstream end of the door body 33 is on the downstream side of the pit 75 in any case, so that the vibration of the door body 33 does not occur. Further, since the downstream door 33 supported by the suspension sprocket 34 and the rope 71 is pushed from the outside to the inside by its own weight and water pressure,
It becomes a straight line as well as the upstream side. Valve body if there is no change in flow rate
11a is slightly higher than the middle position
When approaching 59, the water level in the float 4 is slightly higher than the water level in the float chamber 10, and the door 33 remains stationary.

When the flow rate increases and the upstream water level becomes slightly higher than the planned water level, the pilot float 13 and the valve body 11a
Rises, the float water level adjusting port 74 is closed and the water level in the float 4 decreases, the float chamber water level adjusting port 59 is opened, and the water level in the float chamber 10 rises.
Goes up and the door 33 on the opposite side goes down. Therefore, if the flow rate increases to some extent, the roller 69 of the posture maintaining device lands on the bottom surface of the water channel 3, and if the flow rate further increases, the door body
Since the height of 33 decreases and the inclination of the upstream surface of the door 33 increases, the tip of the lower rubber 44 moves away from the bottom surface of the water channel 3,
When the sediment flowing in the pit 75 is washed by the jet flow flowing out from below the door 33, and the flow rate further increases and the downstream water level becomes close to the upstream water level, the inside of the float 4 and the float chamber 10
Since the water levels inside are the same, the suspension sprocket 34 is stored in the pit 75, and the door 33 is completely flat.

When the flood disappears, the water level of the water channel 3 becomes low, the sealing portion 4c of the float 4 is exposed in the air, and the float 4 becomes heavy and descends, so that the door 33 on the opposite side stands up.
Since the diameter of the drive sprocket 54 is sufficiently smaller than that of the suspension sprocket 65, the sealing portion 4c of the float 4 is
As a result, the water level difference between the upstream and downstream of the gate 31 is generated, but when the upstream water level does not reach the planned water level, the water level in the float chamber 10 is equal to the downstream water level, and the water level in the float 4 is the upstream water level. Is equal to, so float 4
And the door 33 rises. When the upstream water level reaches the planned water level, the valve body 11a separates from the float chamber water level adjusting port 59, the water level in the float chamber 10 rises, the descent of the float 4 stops, and the door body 33 stops. When the flow rate further decreases and the upstream water level becomes lower than the planned water level, the float chamber water level adjusting port 59 is closed and the water level in the float chamber 10 decreases.
Since the float water level adjusting port 74 is opened and the water level in the float 4 rises, the float 4 descends and the door 33 on the opposite side 33
Rises and the upstream water level rises.

Since the dust that sinks in the water often stays on the spot, most of the dust is floating substances from the upstream, but in the present embodiment, since the water overflows above the door 33,
Dust can be easily managed because it flows downstream together with running water. In addition, it is possible to rationally dispose of dust collectively in the downstream.

Next, a fourth embodiment will be described with reference to FIGS. In this embodiment, since the water level difference between the upstream and downstream of the gate 31 is kept constant, the door body 33 does not fall completely, therefore, as shown in FIG. 13, the pit 75 is not provided, The upstream inclination of the door 33 is vertical so that the float 4 is not unnecessarily enlarged. Further, if the flow rate increases and the water level in the water channel 3 rises, the door body 33 needs to rise, so here,
The float 4 and the door 33 are suspended on the same upstream side.

Further, as shown in FIG. 14, a water pipe 76 is provided below the water pipe 15 that bypasses the float chamber 10, and one end of the water pipe 76 is T-shaped to the still water reservoir 7 side. It is projected, and the other end is open in the reservoir 9. A pipe-shaped rod 12 penetrates the vertical portion of the T-shaped end, and the upper and lower portions of the vertical portion are closed by packing 11b.
The lower end of the seal is also blocked, and a water passage between these two packings 11b.
The water pipe 76 and the rod 12 are communicated with each other by drilling 77.
Further, a water passage hole 77 is also formed in a portion of the rod 12 that is in contact with the bottom surface of the pilot float 13, so that the rod 12 projects above the sky.

The rod 12 is fitted with a valve body 11a,
11a, the float chamber water level adjusting port 59 is arranged above, and the float water level adjusting port 74 is arranged below. If the water level difference between the upstream and the downstream becomes large and the pilot float 13 rises, the float chamber water level adjusting port 59 is closed, and if the pilot float 13 descends, the float water level adjusting port 74 is closed.

Further, the upper limit water level and the lower limit water level are set, which means that no further rise and fall of the water level are allowed.
An upper stopper 78 for the upper limit water level is installed near the upper end of 12 and a lower stopper 79 for the lower limit water level is installed at a position slightly higher than the upper end of the pilot float 13. Between the stoppers, the rod 12 is loosely fitted to an arm 81 fixed to the water level detection float 80.
The area of the water level detection float 80 is sufficiently larger than that of the pilot float 13.

Next, the operation will be described. In a large-scale lowland creek, the water level exceeding the pump capacity must be stored at the time of flood, so the water level changes from moment to moment and it cannot be managed based on the water level.
Therefore, the problem is solved by keeping the water level difference between the plurality of gates 31 constant. Fortunately, the cross section of the clique depends on the reservoir volume, so the cross section is extremely large and the flow velocity is extremely small.Therefore, the difference in water level immediately downstream of the upstream gate 31 and upstream of the downstream gate 31 may be negligible. Many.

Therefore, according to the above configuration, when the water level difference in the downstream becomes too large, the pilot float 13
Rise and the valve body 11a closes the upper float chamber water level adjusting port 59, the water level in the float chamber 10 decreases, while the lower float water level adjusting port 74 opens and the float 4 water level rises. Therefore, the float 4 and the door 33 are lowered to increase the overflow amount, and the water level difference between the upstream and downstream of the gate 31 can be reduced. On the other hand, if the water level difference between the upstream and the downstream is too small, the pilot float 13 descends and the door body 33 rises, the overflow amount decreases and the water level difference increases, so that the water level difference between the upstream and downstream becomes constant. can do.

By the way, since the large-scale lowland is a land that has been reclaimed one by one several times, the upstream area has one side that drainage has deteriorated due to the reclamation in the downstream area. Since the installation of the gate 31 was not always sufficient, the flooded water is concentrated in the lower downstream area. This device is designed to prevent flooding in at least the upstream area.When the water level reaches the upper limit water level, the water level detection float 80 pushes the upper stopper 78 up through the arm 81, so the valve body 11
a rises, the float chamber water level adjusting port 59 is squeezed to lower the water level, and the float water level adjusting port 74 is opened to raise the water level, and the door 33 falls down, so that the water level exceeds the upper limit water level. Can be prevented from rising.

Further, if the drought continues for a long time, the water source will be insufficient, but in many cases, the upstream water will be prioritized. In such a case, the water level detection float 80 pushes down the lower stopper 79 to raise the door 33, so that the custom can be protected.

Conventionally, upstream priority practices have been adhered to for both drainage and irrigation. It was an unavoidable practice in the era of irrigation using treadmills because it was necessary to keep the water surface extremely high for irrigation. However, at the present time when using a pump, the height difference between the upper limit water level that does not cause flood damage and the lower limit water level that does not cause drought is secured for 1 m or more. It becomes economical. In addition, with the aging of the rural population, the managers of agricultural and irrigation facilities are running out of control, and the benefits of unmanned production are extremely large. In addition, since the power has been made non-powered, it is possible not only to save the electricity charge but also to avoid the danger associated with the power outage. Therefore, it is considered that the benefit of the present invention to society is great.

[0064]

In the device according to the present invention, the door body has a flexible structure, and the float is used as the drive source. Therefore, the door body can be bent and housed in the downstream side, and the drive device can be made small. be able to. Further, since the door body can be undulated from the riverbed, the upstream water flows over, and accordingly, water plants and the like flow downstream, so that water communication at the time of flood is surely improved. Further, the simple structure is economical and maintenance work is easy. In addition, it is possible to adopt a configuration in which running water flows down from above or below the door body, which is extremely versatile.

[Brief description of drawings]

FIG. 1 is a side sectional view of a gate according to a first embodiment of the present invention.

FIG. 2 is a plan view of the gate shown in FIG.

FIG. 3 is a top view showing details of a chain portion of a door body of the gate shown in FIG.

FIG. 4 is a side sectional view taken along the line AA in FIG.

FIG. 5 is a side sectional view showing an operation chamber of the gate shown in FIG.

FIG. 6 is a side sectional view of a gate of the second embodiment.

FIG. 7 is a side sectional view showing an operation chamber of the gate shown in FIG.

FIG. 8 is a plan view of a gate according to a third embodiment.

9 is a side sectional view of the gate shown in FIG.

10 is an enlarged view of part B shown in FIG. 9. FIG.

11 is a side sectional view showing an operation chamber of the gate shown in FIG.

FIG. 12 is a plan view of a gate according to a fourth embodiment.

FIG. 13 is a side sectional view of the gate shown in FIG.

14 is a side sectional view showing an operation chamber of the gate shown in FIG.

FIG. 15 is a side sectional view showing a conventional roller gate and its operation chamber.

FIG. 16 is a side sectional view showing a conventional radial gate and its operation chamber.

[Explanation of symbols]

3 waterways 3a side wall 4 floats 10 float chamber 31 chain gate 32a suspension shaft 33 door 34 suspension sprockets 35 rails 36a Tomizo 37 chains 37a link 39 vertical girder 41 horizontal girder 51 drive shaft 55 drive chain 57 counterweight 61 barrier 64 suspension chain

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E02B 7/20 109 E02B 7/20 105 E02B 7/42

Claims (3)

(57) [Claims] 1. A plurality of suspension sprockets which are horizontally crossed over the water surface of a water channel, are fixed to a suspension shaft rotatably supported at intervals, and are suspended by the plurality of suspension sprockets to be submerged in water as vertical girders. The hanging chain and the horizontal girders fixed and installed on the upstream side between the links positioned horizontally for each link of the plurality of chains make the horizontal girders watertight and the door body. The upstream side portion of the door body formed and wound around the suspension sprocket is supported by a door groove provided on the side wall of the water channel at its edge portion, and the door body can be moved up and down in association with the rotation of the suspension shaft. Established and connected to the waterway
The float floated in the float room
Connected to the suspension shaft via a hanging drive chain
The downstream side of the door body wound around the suspension sprocket
A rail with an appropriate slope to support the section is attached to the suspension spline.
A chain gate device that is connected to a rocket and is installed on the downstream side . 2. A suspension shaft rotatably supported horizontally across the water channel is provided in a door groove provided on the side wall of the water channel so as to be vertically movable.
A plurality of suspension sprockets are fixed to the suspension shaft at intervals, and the chains are respectively suspended by the plurality of suspension sprockets and hung in the water as vertical girders, and the links positioned horizontally for each link of the plurality of chains. The cross girder is fixed to the upstream side of the cross girder, and the cross girder is made watertight to form a door body, and the upstream surface of the door body is covered with a flexible shielding curtain. The chain gate device, wherein an end of an upstream side portion of the door body is engaged with a river bed upstream of the door groove, and a downstream side end of the door body is held downward. 3. A drive shaft is provided above the suspension shaft, one end of a suspension chain wound around the drive shaft is suspended from both ends of the suspension shaft, and a counterweight is suspended from the other end of the suspension chain. 3. The chain gate device according to claim 2, wherein a float floated in a float chamber communicating with the water channel is suspended from a drive chain wound around the drive shaft.