JP2005023747A - Automatic water level regulating gate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic water level regulating gate where water passing above the upstream preset water level can easily flows over a door body. <P>SOLUTION: The automatic water level regulating gate is formed in such a way that the door body 3 placed at a downstream side of a rotating shaft 4 and that a top end 3a of the door body 3 is aligned on almost the same level as the upstream preset water level 25. Accordingly, water exceeding the upstream preset water level 25 flows easily over the top end 3a of the door body 3 and pours into the downstream side, so as not to overflow from a water channel 2a of the upstream side of the door body 3 without causing a damage to the surroundings. Also, the refuse of dirts or the like is not held back but runs toward the downstream without staying on the water surface of the upstream side of the door body 3. Furthermore, since a stagnant pond 9 and a float chamber 7 are placed in parallel at the downstream side of the rotating shaft 4 along the water channel 2, a horizontal length from the upstream end of the hydrostatic pong 9 to the downstream end of the float chamber 7 can be set shorter than usual, so that a civil engineering construction cost can be reduced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an automatic water level adjustment gate that automatically adjusts the water level of a water channel.

The water channel is provided with a gate that opens and closes the water channel by automatically raising and lowering the door body according to the water level on the upstream side or downstream side of the gate. In particular, a conventional automatic water level adjustment gate that opens and closes a water channel by automatically raising and lowering a door body according to the upstream water level will be described with reference to FIGS.
As shown in FIGS. 3 and 4, the conventional automatic water level adjustment gate 50 is a door 3 that can open and close the water channel 2, and a rotation that is connected to the door 3 via a gate arm 10 and crosses the water channel 2. The shaft 4, the float 5 that rotates the rotary shaft 4 by the vertical movement by buoyancy and moves the door body 3 up and down, accommodates the float 5, and passes through the water channel 2 b and the outlet 6 on the downstream side of the door body 3. The float chamber 7 communicates with the float chamber 7, and is connected to the water channel 2 a on the upstream side of the door body 3 and a hydrostatic pond 9 that communicates with the inlet 8.

The door body 3 is formed in an arc shape when viewed from the side, and is disposed on the upstream side of the rotating shaft 4, and is upstream of the pair of gate arms 10 fixed to the rotating shaft 4 and extending in the water channel direction. It is fixed to the part. On the other hand, a counterweight 11 is fixed to the downstream end of the gate arm 10. Further, on the downstream side of the rotating shaft 4, a stopper 12 is disposed across the water channel 2 in order to prevent the gate arm 10 from being excessively rotated.
And the door body 3 will be arrange | positioned by the ground level H 'whose upper end 3a is higher than the upstream setting water level surface 25 (ground level height H) in the state which closed the water channel 2. FIG.

  In addition, a water tank having a full length L ′ is provided on the side of the water channel 2, and this water tank is arranged on the upstream side of the rotating shaft 4, and is partitioned into a still water basin 9 and a float chamber 7 from the upstream side by a partition plate 15. ing. The hydrostatic pond 9 communicates with the water channel 2a on the upstream side of the door body 3 via an inflow port 8 provided below the side wall, and the float chamber 7 communicates with the water channel 2b on the downstream side of the door body 3 and below the side wall. It communicates via the outflow port 6 provided in the. The inflow port 8 is formed at a position away from the door 3 by a predetermined distance upstream in order to improve the operation accuracy of the gate.

  In the still water pond 9, a water injection tank 16 is disposed, and an upper end of the water injection tank 16 is fixed to the upstream set water level surface 25. A water injection pipe 17 that communicates with the float chamber 7 extends from the lower part of the water injection tank 16. Further, above the water injection tank 16, a water injection tank hoist 18 is disposed and connected to the water injection tank 16. The water injection tank 16 can be moved up and down by the water injection tank hoisting machine 18, and the upstream set water level surface 25 that is the upper end of the water injection tank 16 can be appropriately changed.

  A float 5 is accommodated in the float chamber 7, and the float 5 communicates with a downstream water channel 2 b via a lower communication pipe 19 extending from the lower part and a float water guide pipe 20. Further, a connecting rod 21 is extended above the float 5, and an upstream end portion of the float arm 22 interlocking with the rotating shaft 4 is pivotally attached to the lower portion of the connecting rod 21.

Next, a water level adjustment method using a conventional automatic water level adjustment gate will be described with reference to FIGS.
When the water level on the upstream side of the door body 3 rises and the water level in the hydrostatic pond 9 exceeds the upper end of the water injection tank 16 (upstream set water level surface 25), the water floats from the upper end of the water injection tank 16 via the water injection pipe 17. It flows into the chamber 7. Then, the water level in the float chamber 7 rises, the float 5 rises due to buoyancy, and the float arm 22 and the rotary shaft 4 rotate in the clockwise direction and are connected to the rotary shaft 4 via the gate arm 10. The raised door body 3 is rotated and lifted, and the water channel 2 is opened.
On the other hand, when the water level of the hydrostatic pond 9 falls below the upstream set water level surface 25, the water does not flow into the float chamber 7 from the upper end of the water injection tank 16, so the float 5 descends, and the door body is interlocked with the float 5. 3 also descends and closes the waterway 2.

  Moreover, as a structure similar to the automatic water level adjustment gate described above, in Patent Document 1, as shown in FIGS. 1 and 2, a door body that can open and close a water channel in conjunction with a rotation shaft is rotated. Located on the upstream side of the shaft, and on the side of the water channel, a float chamber that accommodates a float that moves up and down by a buoyant force to raise and lower the door body via the rotating shaft, and an upstream side of the float chamber. A water injection chamber that is provided and in which an overflow weir is disposed is arranged along the water channel on the upstream side of the rotating shaft. When the upstream water level rises, water flows into the overflow weir, the float rises, and the door body pivots up and down in conjunction with this float to open the water channel. Yes.

Japanese Patent Publication No. 5-26885

As described above, both of the conventional automatic water level adjusting gate shown in FIGS. 3 and 4 and the invention of Patent Document 1 have the door disposed on the upstream side of the rotating shaft, and the water channel is fully closed. The height of the door body in the state is set slightly higher than the upstream set water level surface. Therefore, the water exceeding the upstream set water level cannot overflow the upper end of the door body, and even if it can overflow the upper end of the door body, the water weight is loaded on the door body, With this design operating force, it is impossible to raise the door body, so it overflows from the waterway and damages the periphery of the waterway.
In addition, garbage such as dust flowing down is blocked by the door body and stored on the water surface on the upstream side of the door body, and often manual labor is required to remove the dust and the like.

  Furthermore, the inflow port that connects the upstream water channel and the still water basin needs to be formed at a predetermined distance from the door body to the upstream side in order to improve the operation accuracy of the gate. There was a problem that the horizontal length of the civil engineering structure part from the end part to the downstream end part of the float chamber was increased, and the civil engineering work cost was increased.

  This invention is made | formed in view of this point, and it aims at providing the automatic water level adjustment gate which the water beyond the upstream setting water level surface can overflow a door body easily.

According to the present invention, as means for solving the above problems, the invention described in claim 1 is provided with a rotating shaft that traverses the water channel and a door body that can open and close the water channel in conjunction with the rotating shaft. The door body is disposed on the downstream side of the rotating shaft, and the upper end of the door body is disposed on substantially the same plane as the upstream set water level surface in a state in which the door body fully closes the water channel. It is characterized by that.
By configuring in this way, the water exceeding the upstream set water level surface can easily overflow the upper end of the door body and flow into the downstream side where the water level is low, and the water can overflow the upper end of the door body. However, since the overflowing water weight is not applied to the door body and the door body can be raised normally by the original design operating force, it will overflow from the upstream waterway and cause damage to the surroundings. Absent. Further, garbage such as dust flowing down the water channel flows downstream without being blocked by the door body, and does not accumulate on the upstream water surface of the door body.

According to a second aspect of the present invention, in the first aspect of the present invention, a float chamber that accommodates a float that moves up and down by buoyancy to rotate the rotating shaft, and communicates with the float chamber, and the door body A hydrostatic pond communicating with the upstream water channel is provided, and the hydrostatic pond and the float chamber are arranged in parallel along the water channel on the downstream side of the rotating shaft.
By configuring in this way, the inlet that connects the still water basin and the upstream water channel can be formed on the upstream side from the door body at a distance necessary to improve the operation accuracy of the gate. The horizontal length of the civil engineering structure from the upstream end to the downstream end of the float chamber can be set short, and civil engineering costs can be reduced.

According to the automatic water level adjustment gate of the present invention, the door body is disposed downstream of the rotation shaft, and the upper end of the door body is disposed so as to be substantially flush with the upstream set water level surface. The height of the door body can be set lower than before, leading to weight reduction. Water exceeding the upstream set water level can easily overflow the door body, and even if water overflows the door body, Since the body can be raised normally by the initial design operating force, the upstream water level can be easily adjusted, and the upstream water channel overflows and does not damage the surroundings. In addition, dust and other debris that flows down are not blocked by the door body and flow downstream, and do not accumulate on the water surface on the upstream side of the door body. .
Further, since the float chamber that accommodates the float that rotates the rotation shaft by the vertical movement due to the buoyancy, and the still water reservoir that communicates with the float chamber, are arranged in parallel along the water channel on the downstream side of the rotation shaft. The inlet that communicates with the upstream water channel can be formed on the upstream side of the door body at a distance required to improve the gate operation accuracy, and from the upstream end of the hydrostatic pond to the downstream of the float chamber The horizontal length of the civil engineering structure up to the side edge can be set short, and civil engineering work costs can be greatly reduced compared to the conventional one.

  Furthermore, the gate arm connected to the door body and rotating in conjunction with the rotating shaft is disposed downstream of the rotating shaft, and when the water flow is blocked by the door body, the gate arm has a pulling direction. Because the load only acts on the gate, it is not necessary to study buckling of the gate arm as in the past, and considering the eccentricity due to buckling, examine the accuracy of the gap between the side walls of the water channel and both sides of the door body There is no need to do.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to FIG. 1 and FIG. Note that the same reference numerals are used for the same members and corresponding parts as in the conventional example.
As shown in FIGS. 1 and 2, an automatic water level adjusting gate 1 according to an embodiment of the present invention is connected to a door body 3 that can open and close a water channel 2 and to the door body 3 via a gate arm 10. A rotary shaft 4 that traverses the water channel 2, a float 5 that rotates the rotary shaft 4 by moving up and down due to buoyancy and moves the door body 3 up and down, and accommodates the float 5 and communicates with the water channel 2 b on the downstream side of the door body 3. The float chamber 7 is configured to communicate with the float chamber 7 via the water injection tank 16 and the hydrostatic basin 9 communicates with the water channel 2 a on the upstream side of the door body 3.
Here, the description of the same form as the conventional example is omitted, and only the difference from the conventional example will be described below.

The door body 3 has an arc shape in a side view and is disposed on the downstream side of the rotation shaft 4 and is fixed to the downstream end portions of the pair of gate arms 10 fixed to the rotation shaft 4 and extending in the water channel direction. Then, it is configured to rotate up and down via the gate arm 10 around the rotation shaft 4. On the other hand, a counterweight 11 is fixed to the upstream end of the gate arm 10.
Further, in a state where the door body 3 fully closes the water channel 2, the upper end 3 a of the door body is in a position substantially flush with the upstream set water level surface 25 (the ground height H) and is in contact with the bottom surface of the water channel 2. It arrange | positions downstream from a lower end.

  A water tank having a full length L (shorter than the full length L ′ in FIG. 3) is provided on the side of the water channel 2, and this water tank is disposed on the downstream side of the rotating shaft 4. 9. Divided into float chamber 7.

  The hydrostatic pond 9 communicates with the float chamber 7 through a water injection tank 16 disposed inside, and communicates with the water channel 2 a on the upstream side of the door body 3 through the inlet 8. The inflow port 8 is formed below the side wall of the water channel 2a in the vicinity of the downstream side of the rotary shaft 4 that is a predetermined distance away from the door body 3 to the upstream side in order to improve the operation accuracy of the gate.

  The float chamber 7 has a float chamber conduit 6a extending downstream from the downstream side wall portion thereof, connected to the outlet 6 provided on the side wall of the downstream water channel 2b of the door body 3, and the downstream water channel 2b. Communicating with The float 5 housed in the float chamber 7 has a float guide in which an extendable lower communication pipe 19 extending from the lower portion extends downstream from the float chamber 7 and communicates with the downstream water channel 2b. It is connected to the water pipe 20. Further, a downstream end portion of the float arm 22 interlocking with the rotating shaft 4 is pivotally attached to the lower portion of the connecting rod 21 extending above the float 5.

  In addition, since the adjustment method of the water level by the automatic water level adjustment gate which concerns on embodiment of this invention is the same as a prior art example, description here is abbreviate | omitted.

  As described above, according to the automatic water level adjustment gate 1 according to the embodiment of the present invention, the door body 3 is disposed on the downstream side of the rotary shaft 4, and the door body 3 is in the state where the water channel 2 is fully closed. Since the upper end 3a of the upper end water level surface 25 is substantially flush with the upstream set water level surface 25, the water exceeding the upstream set water level surface 25 easily flows over the upper end 3a of the door body 3 and flows into the downstream side where the water level is low. Even if water overflows the upper end 3 a of the door body 3, the water weight is not applied to the door body 3, and the door body 3 normally rises due to the initial design operating force. Flooding from the waterway 2a will not cause damage to the surroundings. Furthermore, dust such as dust flowing down can be allowed to flow downstream without being dammed up by the door body 3 and stored on the upstream water surface of the door body 3.

  In addition, according to the automatic water level adjusting gate 1 according to the embodiment of the present invention, the hydrostatic basin 9 and the float chamber 7 are arranged in parallel along the water channel 2 on the downstream side of the rotating shaft 4. The inlet 8 communicating with the water channel 2a on the side can be formed at the upstream side of the door body 3 at a distance necessary to improve the gate operating accuracy, and the float chamber can be formed from the upstream end of the still water basin 9. The horizontal length L of the civil engineering structure part up to the downstream end of 7 can be set shorter than before, and the construction cost can be greatly reduced.

FIG. 1 is a plan view of an automatic water level adjustment gate according to an embodiment of the present invention. FIG. 2 is a side view of the automatic water level adjustment gate according to the embodiment of the present invention. FIG. 3 is a plan view of a conventional automatic water level adjustment gate. FIG. 4 is a side view of a conventional automatic water level adjustment gate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Automatic water level adjustment gate 2 Waterway 3 Door body 3a Upper end 4 Rotating shaft 5 Float 7 Float chamber 9 Still water reservoir

Claims (2)

A rotating shaft that traverses the water channel and a door body that can open and close the water channel in conjunction with the rotating shaft are provided, the door body is disposed downstream of the rotating shaft, and the door body has a water channel. An automatic water level adjustment gate, wherein an upper end of the door body is disposed on substantially the same plane as an upstream set water level surface in a fully closed state. A float chamber that houses a float that moves up and down by buoyancy to rotate the rotating shaft, and a hydrostatic pond that communicates with the float chamber and communicates with a water channel on the upstream side of the door body. The automatic water level adjusting gate according to claim 1, wherein the chamber is arranged in parallel along the water channel on the downstream side of the rotating shaft.

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