JP6347387B2 - Water channel opening and closing device - Google Patents

Description

  The present invention is provided in a waterway opening such as a water intake channel or a water discharge channel leading to a river or the sea, and automatically opens and closes the waterway opening using buoyancy according to the water level of the river or the sea area. About.

  In general, an opening and closing device is used at the opening of a waterway such as Xiamen that leads from the land area to a river or sea area to prevent inundation into the waterway at an abnormal tide level such as a tsunami or storm surge or when the river is flooded. ing.

  This type of opening / closing device includes a flap gate (for example, Patent Document 1) that opens and closes an opening by rotating it up and down via a hinge to the outside of the opening, outside the opening of the water channel, and inside the water channel In many cases, a undulating gate is installed in a normal state and is raised when necessary to shield the water channel (for example, Patent Document 2).

  Furthermore, the fluctuation of the water level on the river or sea area side is linked to the floating body, so that the undulation gate is raised (for example, Patent Document 3) and the gate for opening and closing the water channel opening is slid up and down. The thing (for example, patent document 4) is developed.

JP2013-96122A JP 2014-1498 A JP 2011-246990 A JP 2004-363197 A

  In the conventional water channel opening / closing device described above, the flap gate and the undulating gate require a maintenance because the gate that shuts off the water channel can be rotated by a hinge structure, and sometimes it does not operate when necessary. There is a problem that things happen. In particular, in the undulating gate that is always at the bottom of the water, the hinge structure part is always in the water, so that the cost for maintenance becomes large.

  In the case of machine control such as air injection, there is a problem that the cost becomes high, for example, it is necessary to construct a system for monitoring the operation status or trouble such as power loss.

  Moreover, the structure of the structure which uses the floating body like patent documents 3 and 4 and slides or undulates the gate in response to the fluctuation of the water level has a complicated structure of the mechanism part for causing the floating body to act on the gate. In addition, there are problems such as high equipment costs, a precise structure, and a lot of moisture and salt in the surrounding environment, which increases the cost for maintenance.

  Furthermore, the conventional waterway opening / closing device has an abnormally high water level, mainly due to high waves, storm surges, or heavy rain, when the waterway opening is always at the bottom of the water and when it is higher than the water surface. In this case, the water pressure in the waterway is instantaneously increased to prevent water from being ejected from an opening such as a manhole on the land side.For example, like the cooling water intake in a nuclear power plant or a thermal power plant, In waterways that need to be continuously pumped up, if the waterway opening is exposed to the atmosphere due to a drop in the water level during the tsunami, pumping of the cooling water stops and water in the waterway flows backward and is discharged for cooling. There was a problem that the function was impaired.

  Furthermore, it is necessary to be able to cope with both the flow direction during intake and discharge in a waterway that serves both as a water intake and a water discharge. However, conventional devices share both water intake and water discharge. The function for the water channel was insufficient.

  In view of such a conventional problem, the present invention can easily cope with the case where the water channel opening is at a position higher than the water surface in a normal state or in a case where the water channel is always under water, Furthermore, the underwater intake can respond to both sudden rises in water level when a tsunami occurs and sudden drop in water level when a tsunami occurs, and it is also possible to deal with waterways that share both intake and discharge, and the structure is simple. The purpose of the present invention is to provide a water channel opening / closing device that requires less maintenance than the prior art.

The feature of the waterway opening / closing device according to the invention described in claim 1 for solving the above-described conventional problem is provided in a waterway opening for water intake or drainage that leads to a river or sea area. In the water channel opening and closing device that opens and closes the water channel opening using buoyancy according to the upper and lower levels of the water level, on the river or sea area side of the water channel opening that is below the normal water level on the river or sea area side, A gate wall that can move up and down along the water channel opening is provided, and the gate wall is provided on the water channel opening part for releasing the water channel opening part to the river or sea area side, and on the lower side and the upper side of the water channel opening part. Each having a water channel closing portion for closing the water channel opening, and a floating body that moves up and down in response to fluctuations in the water level on the river or sea area side, corresponding to the vertical movement of the water level on the river or sea area side. Depending on the vertical movement of the floating body The gate wall is moved up and down , the lower water channel closing part closes the water channel opening due to the abnormal rise in the water level on the river or sea area side, and the upper water channel closing part closes the water channel opening due to the abnormal lowering of the water level It is intended to automatically open and close the water channel opening .

  In addition to the configuration of claim 1, the gate wall is supported in a vertically movable manner along a pair of guide rails installed vertically on both sides of the water channel opening portion. A lower stopper for regulating the lowering side height of the gate wall is provided at the lower end side between the guide rails, and an upper stopper for regulating the rising side height of the gate wall is provided at the upper end side between the guide rails. It is in.

As described in claim 1, the present invention is provided in a water channel opening for water intake or drainage leading to a river or sea area, and uses the buoyancy according to the upper and lower levels of the water level in the river or sea area. In the water channel opening / closing device that opens and closes, the river or the sea area side of the water channel opening part below the normal water level on the river or sea area side is provided with a gate wall that can move up and down along the water channel opening part, The gate wall includes a water channel opening part for releasing the water channel opening part to the river or sea area side, and a water channel closing part for closing the water channel opening part below and above the water channel opening part, respectively. together provided, comprising a floating body which moves up and down in response to variations in the water level of the river or the sea side, is moved up and down the gate wall by floating up and down operation corresponding to the vertical movement of the river or the sea side water level, the river Or the water level on the ocean side By waterway closing portion of the lower side water passage closure of upper so as to close the water passage opening by abnormal lowering of the water level as well as closing the water passage openings, to automatically open and close the water passage opening by elevated, even by human power Because it uses natural power that is not mechanically controlled, it can be automatically activated even in the event of a power failure or in the absence of a manager, and the gate wall movement mechanism is also a vertical slide due to buoyancy. In addition, a complicated interlocking mechanism is unnecessary, and a mechanical structure such as a hinge is not used, so the structure is simple and installation and maintenance are easy.

  In addition, the gate wall rises by buoyancy at the same time as the water level rises during abnormal tides such as tsunami and storm surges or river floods, preventing water from entering the waterway and not allowing water and air to enter the waterway. The external force acting in the water channel is only the hydrostatic pressure, and the external force acting on the water channel inner wall can be reduced.

  Furthermore, even if the gate wall does not reach the rising limit and the water channel opening is not completely closed, and even if it is submerged in the water channel, the gate wall rises and the cross sectional area of the inlet of the water channel opening decreases. The total amount of overflow is reduced.

Furthermore, the present invention closes the water channel opening when the water level rises, and also closes the water channel opening when the water level is abnormally reduced. For example, the cooling water in the facility is disadvantageously reduced like a cooling water intake. In such cases, it is possible to prevent water leakage when the water level drops.

According to the second aspect of the present invention, the gate wall is supported so as to be vertically movable along a pair of guide rails installed vertically on both sides of the water channel opening portion, and the lower end side between the guide rails And a lower stopper for regulating the descending side height of the gate wall, and an upper stopper for regulating the rising side height of the gate wall on the upper end side between the guide rails, thereby increasing the buoyancy and movement of the gate wall. With a simple structure consisting only of a guide rail and a stopper for controlling the above, an effect equal to or higher than that of the prior art can be obtained.

It is a longitudinal cross-sectional view which shows the 1st Example of this invention. It is a cross-sectional view same as the above. (A) (b) is explanatory drawing which shows the gate wall operation state of the Example shown in FIG. (A) (b) is explanatory drawing which shows the gate wall operation state of 2nd Example of this invention. (A) (b) (c) is explanatory drawing which shows the gate wall operation state of 3rd Example of this invention. (A) (b) (c) is a front view which shows the other example of the floating body installation state with respect to a gate wall, respectively.

  An embodiment of a water channel opening / closing device according to the present invention will be described with reference to the drawings.

  In the figure, reference numeral 1 is a water channel for water intake and drainage from the land area to a river or sea area, and 2 is the water channel opening. A pair of guide rails 3, 3 arranged vertically are installed on both sides of the water channel opening 2.

  A gate wall 4 is supported between the guide rails 3 and 3 so as to be guided by this and movable up and down. An upper stopper 5 is fixed between the upper ends of the guide rails 3 and 3 so as to regulate the uppermost position of the gate wall 4 by restricting the upward movement of the gate wall 4. The lower stopper 6 that regulates the position of the lowest descent by restricting the movement of the descent side 4 is fixed.

  The gate wall 4 is formed in a rectangular plate shape that is long in the vertical direction, and a water channel opening 10 that is open on the front and back is formed on the gate wall 4. A water channel closing part 11 is provided in an arrangement adjacent to the lower side of the water channel opening part 10.

  The water channel opening 10 is configured such that the water channel opening 2 is opened when the water channel opening 10 overlaps the water channel opening 2, and the lowermost position where the gate wall 4 is lowered and the lower stopper 6 restricts the movement. When the water channel opening 2 is opened at the position where the water channel opening 10 overlaps the water channel opening 2 and the gate wall 4 is raised and the upper stopper 5 restricts the rise, The water channel opening 2 is closed by the water channel closing part 11.

  A floating body 15 is fixed to the lower end of the gate wall 4, and the gate wall 4 is raised by buoyancy acting on the floating body 15 when the water level W on the river or sea area side abnormally rises.

  As shown in FIG. 3 (a), this water channel opening / closing device is used for a water discharge channel in which the water channel opening 2 is above the water level W on the river or sea area side. It is set so that the floating body 15 is located at a position higher than the water level W that is not affected by normal fluctuations in the sea area water level W, and when a tsunami or storm surge occurs, buoyancy acts on the floating body 15 at that time. The position of the upper stopper 5 is set so that the gate wall 4 rises to a position where the water channel opening is closed and stops as shown in FIG. .

  In this example, the normal river or sea side water level W is lower than the water channel opening 2, the gate wall 4 gradually rises as the water level W rises, and the tsunami push wave reaches the water channel opening 2. In this case, the water channel opening 2 is closed by the gate wall 4, and the pressure does not increase rapidly in the water channel 1.

  The above-described example shows an example in which the water channel opening 2 is adapted to a location above the normal water level W on the river or sea side. In addition, the normal water level W is higher than the water channel opening 2. When adapting to the intake or discharge port at the position, the floating body 15 is fixed to the upper end of the gate wall 4 as shown in FIG. The position of the lower stopper 6 is set so that the floating body 15 is located at a position higher than the water level W that is not affected by the fluctuation of the water level W during normal times, and buoyancy acts on the floating body 15 when a tsunami or storm surge occurs. Then, when the water level at that time becomes higher than the height assumed in advance, the position of the upper stopper 5 is set so that the gate wall 4 rises to a position where the water channel opening is closed and stops as shown in FIG. You may keep it.

  In addition, when adapting to a cooling water intake such as a nuclear power plant where the normal water level W is higher than the water channel opening 2, the water channel opening is raised when the abnormal water level rises due to a tsunami. In addition to closing the portion 2, it is necessary to close the water channel opening 2 in order to prevent water discharge from the water intake when the water level drops abnormally at the time of wave pulling.

  In this case, as shown in FIG. 5 (a), an upper water passage closing portion 11a is provided on the upper side of the water passage opening portion 10 of the gate wall 4, and a lower water passage closing portion 11b is provided on the lower side. 4 is fixed to the upper end of the water channel 4, and the water channel opening 10 is kept at the height of the water channel opening 2 by the buoyancy of the floating body 15, and is kept open.

  If the water level rises abnormally during a tsunami or storm surge, the gate wall 4 is raised to a position where it abuts against the upper stopper 5 by the buoyancy of the floating body 15 as shown in FIG. At this time, the water channel opening 2 is closed by the sewer channel closing portion 11b.

  When the water level drops abnormally at the time of pulling, as shown in FIG. 5 (c), the gate wall 4 is lowered to a position where it abuts against the lower stopper 6 as the water level drops. At this time, the upper water channel closing portion 11a May close the water channel opening 2.

  In this example, as described above, the water channel opening 2 can be closed at any time when the water level on the river or sea side is abnormally increased and when the water level is abnormally decreased, and the increase of the water channel pressure when the water level is abnormally increased can be prevented. At the same time, it is possible to prevent the discharge of water in the water channel when the water level is abnormally low, and by using it as a cooling water intake or discharge outlet for nuclear power plants and other facilities, abnormal cooling water in the facility when the water level is abnormally low Reduction can be prevented.

  In each example described above, the case where the horizontally long floating body 15 is fixed to the upper end or the lower end of the gate wall 4 is shown, but the upper end or the lower end of the gate wall 4 is not limited to the upper end or the lower end. The horizontal floating body 15 is fixed at an arbitrary position between the water channel opening 10 and the gate wall 4 is moved upward or downward by the buoyancy of the floating body 15 when the water level is abnormally raised or lowered. 2 may be closed. In this case, the number of floating bodies 15 is not limited to one, and a plurality of floating bodies 15 may be arranged side by side.

  Further, each of the above embodiments shows the case where the floating body 15 is installed sideways. However, as shown in FIG. 6, the floating body 4 which is long in the vertical direction, that is, in the vertical direction, is formed on the gate wall 4. 6 (a), the lower side of the gate wall 4, as shown in FIG. 6 (b), the upper side of the gate wall 4 as shown in FIG. As shown in c), it can be installed at each position necessary for the movement of the gate wall 4 such as the central portion of the gate wall 4. In these cases, it is preferable to fix the floating body 15 to both sides of the gate wall 4 as shown in the drawing.

  By installing the floating body 15 vertically as described above, it is possible to increase the water level fluctuation range until the buoyancy of the size that moves the gate wall 4 to the floating body 15 is generated, and due to normal waves and tides. It becomes easy to make it not operate in the water level fluctuation range.

W Water level 1 Water channel 2 Water channel opening 3 Guide rail 4 Gate wall 5 Upper stopper 6 Lower stopper 10 Water channel opening part 11 Water channel closing part 11a Upper water channel closing part 11b Lower water channel closing part 15 Floating body

Claims (2)

In a water channel opening and closing device that is provided at a water channel opening for water intake and drainage leading to a river or sea area, and opens and closes the water channel opening using buoyancy according to the water level of the river or sea area,
On the river or sea area side of the water channel opening below the normal water level on the river or sea area side, provided with a gate wall that can move up and down along the water channel opening,
The gate wall includes a water channel opening part for releasing the water channel opening part to the river or sea area side, and a water channel closing part for closing the water channel opening part below and above the water channel opening part, respectively. And a floating body that moves up and down in response to fluctuations in the water level on the river or sea side,
The gate wall is moved up and down by the vertical movement of the floating body corresponding to the vertical movement of the river or sea area side water level, and the lower water channel closing part closes the water channel opening due to the abnormal rise in the water level on the river or sea area side An apparatus for opening and closing a water channel opening, wherein the water channel opening closes the water channel opening by an abnormal drop in the water level and automatically opens and closes the water channel opening. The gate wall is supported so as to be vertically movable along a pair of guide rails installed vertically on both sides of the water channel opening portion, and the lowering side height of the gate wall is regulated at the lower end side between the guide rails. The water channel opening and closing device according to claim 1 , further comprising an upper stopper that regulates a height of the rising side of the gate wall at an upper end side between the guide rails.

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