WO2019044443A1

WO2019044443A1 - Water bottom installed flap gate

Info

Publication number: WO2019044443A1
Application number: PCT/JP2018/029816
Authority: WO
Inventors: 俊明森井; 京一仲保; 雄一郎木村; 訓兄宮本
Original assignee: 日立造船株式会社
Priority date: 2017-08-30
Filing date: 2018-08-08
Publication date: 2019-03-07
Also published as: JP2019044351A; JP6846315B2

Abstract

A flap gate (1) comprises a door (2) and a mooring (31). The door (2) rises up or drops down by way of a movable end (24) pivoting about a fulcrum constituted by a support end (23) disposed on the water bottom. The mooring (31) anchors the door (2) to the water bottom. The door (2) comprises a first buoyancy chamber (25), a second buoyancy chamber (26), and a buoyancy chamber connector (27). The first buoyancy chamber (25) is disposed between the movable end (24) and the support end (23). The second buoyancy chamber (26) is disposed between the first buoyancy chamber (25) and the support end (23). The buoyancy chamber connector (27) connects the first buoyancy chamber (25) and the second buoyancy chamber (26) in a manner in which both chambers remain openable. The buoyancy chamber connector (27) is released in a state in which the door (2) has dropped down further than an anchored state of being anchored by the mooring (31). In this way, the door (2) that has dropped down from a risen state can be reset to the anchored state quickly.

Description

Bottom-mounted undulation gate

The present invention relates to a bottom-mounted undulating gate.

Conventionally, in order to prevent a tsunami or high tide and the like from flowing into a port or the like, a relief gate is provided on the bottom of the entrance of the port or the like. In the bottom mounted lift gate, air is supplied to the inside of the door which is lying down on the bottom of the water, so that the door pivots around the rotation axis provided on the bottom of the bottom.

For example, in the document 1 (Japanese Patent Laid-Open No. 2010-133095), a relief gate type in which a door body in which a plurality of door body blocks are arranged in parallel in the width direction is raised by the buoyancy of an air chamber provided at the tip of the door body. A breakwater and a mooring device for mooring the doors of the relief gate breakwater are described.

Here, in the undulating gate type breakwater provided with the mooring device of Document 1, since the air chamber is provided at the tip of the door, the amount of air necessary for raising the door can be relatively reduced. .

In addition, the door in the fallen state can stand up by the buoyancy of the air chamber, and the fallen state is maintained by the mooring device. Therefore, when mooring by the mooring device is released, the door body stands up due to the buoyancy of the air chamber.

By the way, in the relief gate type breakwater of literature 1, when the door is laid down once by operation check etc., in order for the fallen door to be able to stand up again, air is supplied to the air chamber from the air supply device. It is necessary to drain the water in the air chamber. The time for supplying the air chamber with an amount of air necessary for the door to stand up depends on the air supply capacity of the air supply device.

For this reason, if the capacity of the air supply device is sufficiently high, the time required to supply the air to the air chamber can be shortened. On the other hand, there is also a demand to make the capacity of the air supply device as small as possible from an economic point of view.

The present invention is directed to a bottom-mounted relief gate, and it is possible to quickly erect a fallen door even if the ability of the air supply device for supplying air to the air chamber inside the door is not very high. The main purpose is to

According to a preferred embodiment of the present invention, there is provided a water floor installation type hoisting gate comprising: a door body which rises and falls when the movable end portion pivots with a supporting end portion disposed at the water bottom as a fulcrum; And a mooring section to be moored. A first buoyancy chamber disposed between the movable end and the support end, and a second buoyancy chamber disposed between the first buoyancy chamber and the support end; And a buoyancy chamber connecting portion for openably connecting the first buoyancy chamber and the second buoyancy chamber. The buoyancy chamber connection is opened in an overturned state in which the door body is laid down more than in a moored state where the door body is moored to the mooring portion. According to the bottom mounted lift gate, the fallen door can be quickly returned to the moored state.

According to a preferred embodiment of the present invention, there is provided a water floor installation type hoisting gate comprising: a door body which rises and falls when the movable end portion pivots with a supporting end portion disposed at the water bottom as a fulcrum; And a mooring section to be moored. A first buoyancy chamber disposed between the movable end and the support end, and a second buoyancy chamber disposed between the first buoyancy chamber and the support end; And a buoyancy chamber connecting portion for openably connecting the first buoyancy chamber and the second buoyancy chamber. In the door in the upright state, the air in the first buoyancy chamber is replaced with water, whereby the door moves to an overturned state which is more laid than in the moored state moored at the mooring portion. When the door is in the over-collapsed state, the buoyancy chamber connection is opened, and part of the air in the second buoyancy chamber is moved to the first buoyancy chamber via the buoyancy chamber connection. The buoyancy chamber connection is closed by the transition of the door from the over-collapsed state to the moored state.

Preferably, the bottom mounted undulation gate further includes a door contact portion installed at the bottom of the water. The buoyancy chamber connecting portion includes a partition opening provided in a partition between the first buoyancy chamber and the second buoyancy chamber, and a partition gate overlapping the partition opening and closing the partition opening. When the door is in the over-collapsed state, the door contact portion contacts the partition gate to move the partition gate from a position overlapping the partition opening, and the buoyancy chamber connection is opened.

Preferably, when the door is in the over-collapsed state and the buoyancy chamber connection portion is opened, the door is transferred from the over-collapsed state to the moored state.

Preferably, the underwater floor-mounted relief gate further includes an underwater storage unit that stores air below the door in the over-collapsed state. The air stored in the underwater storage unit is used to replenish air to the second buoyancy chamber.

Preferably, the underwater floor-mounted relief gate further includes a lift measurement unit that measures the lift of the door in the moored state. If the lift force of the door is less than a predetermined threshold, air is supplied to the first buoyancy chamber.

Preferably, the bottom mounted undulation gate further comprises an air supply unit for supplying air to the second buoyancy chamber. The first buoyancy chamber has a first opening that opens to the lower surface of the door. The second buoyancy chamber has a second opening that opens to the lower surface of the door. A guide portion extending from the second opening to the first opening is provided on the lower surface of the door. Air supplied from the air supply unit to the second buoyancy chamber overflows downward from the second opening, is guided to the guide unit, and is supplied from the first opening to the first buoyancy chamber.

Preferably, at the upper end portion of the first buoyancy chamber in the upright door, an exhaust unit is provided for openably connecting the first buoyancy chamber and the outside of the door. The position of the exhaust port in the first buoyancy chamber of the exhaust unit is variable with respect to the thickness direction of the door.

According to another preferred embodiment of the present invention, a bottom mounted lift gate according to the present invention comprises a door body which stands up and falls when the movable end portion pivots with a supporting end portion located at the bottom of the water as a fulcrum; And an air supply unit for supplying the air. The door includes a buoyancy chamber disposed between the movable end and the support end. The air supply unit includes an underwater storage unit having a lid-like cylindrical shape that stores air at a lower side than the door in a collapsed state. The air stored in the underwater storage portion is supplied to the buoyancy chamber of the door in the collapsed state.

The above objects and other objects, features, aspects and advantages of the present invention will become apparent from the detailed description of the present invention given below with reference to the attached drawings.

It is a longitudinal cross-sectional view of the uneven | corrugated gate which concerns on one Embodiment. It is a perspective view which shows a part of 2nd main surface of a door. It is a perspective view which shows the movable edge part vicinity of a door. It is a longitudinal cross-sectional view of a relief gate. It is a longitudinal cross-sectional view of a relief gate. It is a longitudinal cross-sectional view of a relief gate. It is a longitudinal cross-sectional view of a relief gate. It is a longitudinal cross-sectional view of a relief gate.

FIG. 1 is a longitudinal sectional view showing a corrugated gate 1 according to an embodiment of the present invention. The relief gate 1 is a bottom-mounted relief gate provided on the bottom of the entrance of a port or waterway or the like in order to prevent a tsunami or storm surge or the like from flowing into the port or waterway or the like. In FIG. 1, the application of parallel oblique lines is omitted in part of the configuration of the relief gate 1. The same applies to FIGS. 4 to 8 described later.

In the following description, the side on which water flows in at the time of water increase in the undulation gate 1 (that is, the upstream side of the inflow direction of water, for example, the offshore side of the undulation gate 1) is referred to as the “front side”. The downstream side of the inflow direction of water in 1 (for example, the land side of the undulating gate 1) is called "rear side". That is, the left-right direction in FIG. 1 is the “front-rear direction”, and the left side and the right side in FIG. 1 are the “front side” and the “rear side”, respectively. Further, a direction perpendicular to the paper surface in FIG. 1 is referred to as “width direction”. The width direction is perpendicular to the longitudinal direction, and the longitudinal direction and the width direction are perpendicular to the vertical direction. The vertical direction in FIG. 1 is substantially parallel to the gravity direction.

The relief gate 1 includes a box 11, a door 2, a mooring portion 31, a lift measurement portion 32, a door contact portion 4, and an air supply portion 5. The box 11 is a structure having a recess 12 on the upper surface, and is embedded in the water bottom. The upper surface of the box 11 is located at substantially the same height as the water bottom. In the recess 12 of the box 11, a door 2, a mooring portion 31, a lift measurement portion 32, a door contact portion 4 and the like are disposed. The mooring portion 31 and the levitation force measurement portion 32 are installed, for example, on the front side surface of the recess 12. The door contact portion 4 is installed, for example, on the bottom surface (that is, the bottom of the water) of the recess 12.

The door 2 is a substantially rectangular parallelepiped member. The door 2 stands up and falls by the rotation of the movable end 24 around the rotation axis J1 of the support end 23 disposed in the recess 12 (that is, in the bottom of the water). In the example shown in FIG. 1, the support end 23 is the rear end of the door 2, and the movable end 24 is the front end of the door 2. In FIG. 1, a solid line indicates a state in which the door 2 falls into water and is moored by the mooring portion 31. In the following description, the direction perpendicular to the width direction and connecting the supporting end 23 of the door 2 and the movable end 24 is referred to as the “longitudinal direction” of the door 2.

Moreover, in the following description, the state of the door 2 (that is, the posture of the door 2) shown by a solid line in FIG. In the door 2 in the moored state, the longitudinal direction of the door 2 is the same as the longitudinal direction. Moreover, the state of the door 2 shown with a dashed-two dotted line in FIG. 1 is called "a standing state." The moored door 2 is turned clockwise in FIG. 1 about the rotation axis J1 extending substantially in parallel in the width direction by being released from mooring by the mooring portion 31 to be in an upright state. When there is no water level difference in front and back of the door 2, the door 2 is maintained in an upright state by the balance between its own weight and the buoyancy. When the water levels before and after the door 2 are different, the door 2 in the upright state is supported by, for example, a door stopper or a tension rod (not shown). The angle between the upright door 2 and the horizontal surface may be set as appropriate in a range of greater than 0 degrees and not more than 90 degrees.

The door 2 in the moored state extends in the front-rear direction and the width direction. As described above, the door 2 in the moored state is accommodated in the recess 12 of the box 11. The position in the vertical direction of the upper surface (hereinafter referred to as "first main surface 21") of the door 2 in the moored state is, for example, substantially the same as the position in the vertical direction of the upper surface of the box 11 around the recess 12. is there. The lower surface (hereinafter, referred to as “second main surface 22”) of the door 2 in the moored state is separated upward from the bottom surface of the recess 12. In the example shown in FIG. 1, the first main surface 21 and the second main surface 22 of the door 2 are substantially flat members substantially perpendicular to the vertical direction.

The door 2 includes a first buoyancy chamber 25, a second buoyancy chamber 26, a buoyancy chamber connection portion 27, and an exhaust portion 28. The first buoyancy chamber 25 is disposed between the movable end 24 and the support end 23 of the door 2. The second buoyancy chamber 26 is disposed between the first buoyancy chamber 25 and the support end 23. The first buoyancy chamber 25 and the second buoyancy chamber 26 are formed by dividing a space between the first major surface 21 and the second major surface 22 by a partition 270 extending in the width direction. In the door 2 in the moored state, the surface on the first buoyancy chamber 25 side of the partition wall 270 is inclined from the support end 23 to the movable end 24 as it goes from the first major surface 21 to the second major surface 22. It is a face.

The buoyancy chamber connection portion 27 is disposed between the first buoyancy chamber 25 and the second buoyancy chamber 26 and opensably connects the first buoyancy chamber 25 and the second buoyancy chamber 26. When the door 2 is in the moored state, the standing state, and the state between the moored state and the standing state, the buoyancy chamber connection 27 is closed, and the first buoyancy chamber 25 and the second buoyancy chamber 26 are It does not communicate. Further, when the door 2 is in the over-folded state described later, the buoyancy chamber connection portion 27 is opened, and the first buoyancy chamber 25 and the second buoyancy chamber 26 communicate with each other through the buoyancy chamber connection portion 27.

In the example shown in FIG. 1, the buoyancy chamber connection portion 27 is provided in the partition wall 270 between the first buoyancy chamber 25 and the second buoyancy chamber 26. The buoyancy chamber connection 27 includes a partition opening 271 and a partition gate 272. The partition opening 271 is an opening provided in the partition 270. The partition gate 272 is, for example, a plate-like member larger than the partition opening 271, and overlaps the partition opening 271 to close the partition opening 271. The partition gate 272 is attached to the surface of the partition 270 on the side of the first buoyancy chamber 25. The partition gate 272 is pivotable about a rotation axis provided at the upper end. The lower end of the partition gate 272 is a movable end that can be separated from the partition 270. That is, the partition gate 272 is an upper hinge type flap gate.

In the door 2 in the moored state, since the surface on the first buoyancy chamber 25 side of the partition 270 is inclined as described above, the partition gate 272 contacts the surface on the first buoyancy chamber 25 side of the partition 270 by its own weight. And the partition opening 271 is closed. When the partition gate 272 pivots clockwise in FIG. 1 and separates from the partition 270, the closure of the partition opening 271 by the partition gate 272 is released, and the buoyancy chamber connection 27 is opened.

The first buoyancy chamber 25 has a first opening 251 opened to the second major surface 22. The first opening 251 is disposed in the vicinity of the partition wall 270. In other words, the first opening 251 is provided on the second major surface 22 at the lower end portion of the first buoyancy chamber 25 in the door 2 in the upright state. The first buoyancy chamber 25 has an airtight structure except for the first opening 251. In the example illustrated in FIG. 1, in the door 2 in the moored state, the partition gate 272 of the buoyancy chamber connection portion 27 is located above the first opening 251. In the door 2, the buoyancy chamber connection 27 can be accessed through the first opening 251.

The second buoyancy chamber 26 has a second opening 261 opened to the second major surface 22. The second opening 261 is disposed in the vicinity of the support end 23. In other words, the second opening 261 is provided on the second main surface 22 at the lower end portion of the second buoyancy chamber 26 in the door 2 in the upright state. Furthermore, in other words, the second opening 261 is provided at the longitudinal end of the second buoyancy chamber 26 opposite to the first buoyancy chamber 25. The second buoyancy chamber 26 has an airtight structure except for the second opening 261.

FIG. 2 is a perspective view showing a part of the second main surface 22 of the door 2. In FIG. 2, portions of the second major surface 22 in the vicinity of the first opening 251 and the second opening 261 are shown. Further, in FIG. 2, the first opening 251 and the second opening 261 are hatched in parallel. The first opening 251 and the second opening 261 are located, for example, at the central portion in the width direction of the door 2. Each of the first opening 251 and the second opening 261 is, for example, a substantially rectangular opening. The shapes of the first opening 251 and the second opening 261 may be variously changed.

A guide portion 221 extending from the first opening 251 to the second opening 261 is provided on the second main surface 22 of the door 2 (that is, the lower surface of the door 2 in the moored state). The guide portion 221 includes a pair of first guide members 222 and a pair of second guide members 223. Each of the first guide member 222 and the second guide member 223 is a plate which protrudes substantially vertically downward from the second main surface 22 (that is, protrudes toward the outside of the door 2) in the door 2 in the moored state Shaped members. In FIG. 1 and FIGS. 4 to 8 described later, illustration of the guide portion 221 is omitted.

The pair of first guide members 222 are disposed on both sides in the width direction of the first opening 251 and the second opening 261, and extend substantially parallel to the longitudinal direction. The pair of guide portions 221 extend substantially in parallel in the longitudinal direction from the front end of the first opening 251 to the rear end of the second opening 261 in the door 2 in the anchored state. The pair of second guide members 223 extend substantially in parallel in the width direction. In the door 2 in the anchored state, one second guide member 223 is disposed along the front end edge of the first opening 251, and the other second guide member 223 is along the rear end edge of the second opening 261. Be placed. In other words, the pair of first guide members 222 and the pair of second guide members 223 surround a region extending in the longitudinal direction from the first opening 251 to the second opening 261 on the second major surface 22. In the guide portion 221, the pair of second guide members 223 may be omitted.

FIG. 3 is a perspective view showing the vicinity of the movable end 24 of the door 2. In FIG. 3, illustration of a part of the first main surface 21 of the door 2 is omitted. An exhaust unit 28 is provided at the movable end 24 of the door 2 (that is, the upper end of the first buoyancy chamber 25 of the door 2 in the upright state). The exhaust unit 28 opensably connects the first buoyancy chamber 25 and the space outside the door 2. In the moored door 2, the exhaust 28 is closed. In the example shown in FIG. 3, the exhaust unit 28 includes an exhaust pipe 281 and an exhaust valve 282.

The exhaust pipe 281 includes a first portion 283 extending in the longitudinal direction of the door 2 and a second portion 284 extending in a direction substantially perpendicular to the first portion 283 from an end of the first portion 283. In other words, the exhaust pipe 281 is a substantially L-shaped pipe. The second portion 284 is disposed in the first buoyancy chamber 25. The second portion 284 indicated by a broken line in FIG. 3 extends in the width direction substantially parallel to the first major surface 21 of the door 2 in the anchored state. The end opening of the second portion 284 is an exhaust port 285 in the first buoyancy chamber 25 of the exhaust unit 28. The first portion 283 penetrates the front end wall of the first buoyancy chamber 25 in the moored door 2 and protrudes from the inside of the first buoyancy chamber 25 to the outside of the door 2. The space between the first portion 283 and the movable end 24 is sealed in a watertight and airtight manner.

The exhaust valve 282 is provided, for example, at the first portion 283 of the exhaust pipe 281 outside the first buoyancy chamber 25. By opening the exhaust valve 282, the first buoyancy chamber 25 and the space outside the door 2 communicate with each other through the exhaust pipe 281. When the exhaust valve 282 is closed, the first buoyancy chamber 25 and the space outside the door 2 do not communicate with each other at the exhaust portion 28.

The exhaust pipe 281 is pivotable about the first portion 283 from a position shown by a solid line and a broken line in FIG. 3 to a position shown by a two-dot chain line. The second portion 284 indicated by a two-dot chain line in FIG. 3 extends in a direction (that is, downward) away from the first major surface 21 of the door 2 in the anchored state. In the exhaust unit 28, by rotating the exhaust pipe 281, the thickness direction of the door 2 (that is, a direction perpendicular to the longitudinal direction and the width direction of the door 2), and the vertical direction of the door 2 in the moored state ), The position of the exhaust port 285 is changed.

The mooring portion 31 shown in FIG. 1 anchors the door 2 to the bottom of the water by locking the movable end 24 of the door 2 with a hook member or the like. In the door 2 in the moored state illustrated in FIG. 1, water is present to about half the thickness of the door 2 on the bottom of the first buoyancy chamber 25 (that is, on the second main surface 22) About half of the volume of the first buoyancy chamber 25 is stored in the upper part of the first buoyancy chamber 25. In addition, a small amount of water is present on the bottom of the second buoyancy chamber 26 (that is, on the second major surface 22), and air is stored in substantially the entire second buoyancy chamber 26.

As described above, in the moored door 2, since air is stored in the first buoyancy chamber 25 and the second buoyancy chamber 26, the direction in which the door 2 floats up like the buoyancy of the door 2. The force acting on is larger than the force acting in the direction of settling the door 2 like the weight of the door 2 or the like. In the following description, the force obtained by subtracting the force acting in the direction of sinking the door 2 from the force acting in the direction of lifting the door 2 is referred to as “lifting force”. In the door 2 in the moored state, a moment (hereinafter, referred to as a “rising moment”) that acts in the direction of raising the door 2 is generated by the lifting force.

The levitation force measurement unit 32 measures the levitation force of the door 2 in the moored state, for example, by measuring the force applied from the door 2 to the mooring portion 31. The levitation force measurement unit 32 indirectly estimates the levitation force of the door 2 by estimating the force applied from the door 2 to the mooring portion 31 based on, for example, the state of the mooring portion 31 (the inclination of the hook member or the like). It may be measured.

The door contact portion 4 is disposed in the space between the second main surface 22 of the door 2 and the bottom of the recess 12 below the door 2 in the moored state. The door contact portion 4 is, for example, a substantially cylindrical or substantially rectangular columnar member that protrudes upward substantially perpendicularly from the bottom surface of the recess 12. The upper end of the door contact portion 4 is located below the second main surface 22 of the door 2 in the moored state, and the door contact portion 4 is not in contact with the door 2 in the moored state. The door contact portion 4 is located below the first opening 251 of the door 2 in the moored state. In other words, the door contact portion 4 protrudes from the bottom surface of the recess 12 toward the first opening 251 of the door 2 in the anchored state. Furthermore, in other words, the door contact portion 4 overlaps the first opening 251 of the door 2 in a moored state in plan view. In plan view, the door contact portion 4 is smaller than the first opening 251 of the door 2 in the moored state.

The air supply unit 5 supplies air to the door 2. The air supply unit 5 includes an underwater storage unit 51, a compressor 52, a pressure gauge 53, and an air supply pipe 54. The compressor 52 and the pressure gauge 53 are disposed on land. In FIG. 1, for the sake of convenience, the compressor 52 and the pressure gauge 53 are drawn above the water surface 91 outside the door 2. The underwater storage portion 51 is disposed in a space between the second main surface 22 of the door 2 and the bottom surface of the recess 12 below the door 2 in the moored state (that is, the door 2 in the collapsed state). . The underwater storage portion 51 is fixed to the bottom surface of the recess 12. The upper end of the underwater storage unit 51 is located below the second main surface 22 of the door 2 in the moored state. The underwater storage unit 51 is not in contact with the moored door 2. The air supply pipe 54 connects the compressor 52 and the underwater storage unit 51. In the air supply unit 5, the compressor 52 is driven so that air is supplied to the underwater storage unit 51 via the air supply pipe 54 and is stored in the underwater storage unit 51.

The underwater storage portion 51 is a cylindrical member with a lid that extends in the vertical direction, and opens downward. In the example illustrated in FIG. 1, the underwater storage unit 51 is a covered substantially cylindrical member. The air supplied from the compressor 52 to the underwater storage unit 51 is stored in a space surrounded by the canopy and the side wall of the underwater storage unit 51. The pressure gauge 53 is connected to, for example, the air supply pipe 54, and measures the pressure in the water reservoir 51.

In the air supply unit 5, based on the measurement value by the pressure gauge 53, it is determined whether or not a predetermined amount of air is stored in the underwater storage unit 51. When the amount of air in the underwater storage unit 51 is less than the predetermined amount, the compressor 52 is driven and air is supplied to the underwater storage unit 51. When the amount of air in the water reservoir 51 reaches a predetermined amount, the compressor 52 is stopped. In the air supply unit 5, when the amount of air in the underwater storage unit 51 decreases more than a predetermined amount due to, for example, air leaking from the underwater storage unit 51 against the intention, the compressor 52 based on the measured value by the pressure gauge 53. Is driven to supply air to the underwater storage unit 51. As a result, it is possible to maintain the state where the predetermined amount of air is stored in the underwater storage unit 51.

The underwater storage unit 51 is located below the second opening 261 of the door 2 in the moored state. In other words, the underwater storage portion 51 protrudes from the bottom surface of the recess 12 toward the second opening 261 of the door 2 in the moored state. The canopy of the underwater storage unit 51 is provided with an air discharge port that releases the air in the underwater storage unit 51 by opening the canopy. The air discharge port overlaps the second opening 261 of the door 2 in a moored state in plan view. The air stored in the water storage portion 51 is used for the replenishment of air to the second buoyancy chamber 26 as described later.

Next, with reference to FIG. 4 to FIG. 8, the rising and falling states of the door 2 will be described. As described above, in the moored state shown in FIG. 1, the door 2 in which the rising moment is acting by the air in the first buoyancy chamber 25 and the second buoyancy chamber 26 is moored by the mooring portion 31. In other words, the door 2 shown by a solid line in FIG. 1 is in a standby state where it can stand up. In the undulating gate 1, the door 2 is turned clockwise in FIG. 1 by releasing the mooring of the door 2 by the mooring portion 31, and stands up as shown in FIG. The upper part of the door 2 in the upright state protrudes upward from the water surface 91 of the outside of the door 2. The water surface 91 is located above the first opening 251 of the door 2. The door 2 which stood up is supported from the front by the door stopper (illustration omitted) which stood up in the front side of the door 2 as mentioned above.

In the door 2 in the upright state, water is present in the lower part of the first buoyancy chamber 25 to about half the length of the first buoyancy chamber 25 in the longitudinal direction, and about half the volume of the first buoyancy chamber 25 Air is stored in the upper part of the first buoyancy chamber 25. In addition, a small amount of water exists, for example, in the lower part of the second buoyancy chamber 26 to the vicinity of the upper end of the second opening 261, and substantially the entire second buoyancy chamber 26 (specifically, the upper end of the second aperture 261) Air is stored in the area above the vicinity). The partition gate 272 of the buoyancy chamber connection portion 27 is placed on the partition 270 by its own weight and overlaps the partition opening 271. Therefore, the buoyancy chamber connection 27 is closed, and the air in the second buoyancy chamber 26 does not move to the first buoyancy chamber 25. The partition gate 272 is not lifted by the pressure of the air in the second buoyancy chamber 26.

When the upright door 2 is laid down, first, the above-mentioned door stopper is separated from the door 2 and laid on the bottom of the recess 12. Subsequently, when the exhaust unit 28 is opened, water flows into the first buoyancy chamber 25 from the first opening 251 located below the water surface 91, and the air in the first buoyancy chamber 25 is exhausted. Is discharged to the outside of the door 2 through the In other words, the air in the first buoyancy chamber 25 is replaced by water. As described above, since the buoyancy chamber connection 27 is closed, the water in the first buoyancy chamber 25 does not flow into the second buoyancy chamber 26 via the buoyancy chamber connection 27.

In the door 2 in the upright state, the air in the first buoyancy chamber 25 is replaced with water, so that the weight of the door 2 is larger than the buoyancy acting on the door, and the door 2 starts to fall. . As shown in FIG. 5, the door 2 falls toward the bottom of the water while most of the air in the first buoyancy chamber 25 is released, and the door 2 is also referred to as a position shown in FIG. After passing through), as shown in FIG. 6, it shifts to a fallen state (hereinafter referred to as “over-collapsed state”) rather than a moored state. The above-described predetermined amount of air is stored in advance in the underwater storage portion 51 located below the door 2 in the excessively fallen state.

In the door 2 in the excessively fallen state, a small amount of air remains in the upper part of the first buoyancy chamber 25, and water is present in most of the first buoyancy chamber 25. In addition, a small amount of water is present on the bottom of the second buoyancy chamber 26, and air is stored in substantially the entire second buoyancy chamber 26. While the door 2 is lying down, in the first buoyancy chamber 25, the air in the first buoyancy chamber 25 passes through the exhaust unit 28 until the exhaust port 285 (see FIG. 3) of the exhaust unit 28 is submerged. It leaks out of the door 2. Therefore, the amount of air remaining in the first buoyancy chamber 25 in the overturned door 2 is adjusted by changing the position of the exhaust port 285. The exhaust valve 282 (see FIG. 3) of the exhaust unit 28 is closed before or at the same time as the door 2 is in the over-collapsed state. The exhaust valve 282 is closed, for example, before the door 2 passes the mooring position and becomes over-collapsed.

When the door 2 is in the overturned state, the upper end portion of the door contact portion 4 enters the first buoyancy chamber 25 through the first opening 251. The upper end portion of the door contact portion 4 contacts the lower end portion of the partition gate 272 in the first buoyancy chamber 25 and moves the lower end portion of the partition gate 272 upward. Thus, the partition gate 272 pivots clockwise in FIG. 6 about the rotation axis of the upper end, and moves from a position overlapping the partition opening 271 to a position away from the partition opening 271. As a result, the buoyancy chamber connection 27 is automatically opened in the overturned door 2.

When the buoyancy chamber connection 27 is opened, part of the air in the second buoyancy chamber 26 moves to the first buoyancy chamber 25 through the partition opening 271 of the buoyancy chamber connection 27. In the first buoyancy chamber 25, an amount of water corresponding to the inflow of air from the second buoyancy chamber 26 flows out from the first opening 251 and the partition opening 271. In the second buoyancy chamber 26, an amount of water corresponding to the amount of air moved to the first buoyancy chamber 25 flows into the second buoyancy chamber 26 from the partition opening 271 and the second opening 261.

Thereby, as shown in FIG. 7, about half of the volume of the first buoyancy chamber 25 is stored in the upper part of the first buoyancy chamber 25. Further, water is present on the bottom of the first buoyancy chamber 25 to about half the thickness of the door 2. In the second buoyancy chamber 26, water is present on the bottom to about half the thickness of the door 2, and about half the volume of the second buoyancy chamber 26 is stored in the upper part of the second buoyancy chamber 26. ing.

By moving air from the second buoyancy chamber 26 to the first buoyancy chamber 25, the rising moment acting on the door 2 is increased, and the door 2 pivots from the over-falling state to the mooring position shown in FIG. And move. The door 2 moved to the mooring position is moored by the mooring portion 31 and is in a moored state. The door 2 in the moored state shown in FIG. 8 has a floating force and is in a standby state where it can stand up.

The door contact portion 4 is separated from the bulkhead gate 272 by the transition of the door 2 from the overturned state to the moored state. As a result, the partition gate 272 pivots by its own weight and returns to a position overlapping the partition opening 271, closing the partition opening 271. As a result, the buoyancy chamber connection 27 is automatically closed.

Thereafter, the air discharge port of the water storage portion 51 is opened, whereby the air stored in advance in the water storage portion 51 flows upward and is supplied to the second buoyancy chamber 26 through the second opening 261. Be done. Thereby, the floating force of the door 2 is increased. The amount of air supplied from the underwater storage unit 51 to the second buoyancy chamber 26 is, for example, air moved from the second buoyancy chamber 26 to the first buoyancy chamber 25 in a state where the buoyancy chamber connection 27 is open. Approximately equal to the amount of (hereinafter referred to as "moving air volume"). In the underwater storage unit 51, air of a predetermined amount equal to or more than the moving air amount is stored in advance.

In the second buoyancy chamber 26, an amount of water corresponding to the inflow of air from the underwater storage unit 51 flows out from the second opening 261. As a result, as shown in FIG. 1, air is stored in substantially the entire second buoyancy chamber 26. On the bottom of the second buoyancy chamber 26, a small amount of water is present. As described above, since the buoyancy chamber connection portion 27 is closed, the air in the second buoyancy chamber 26 does not move to the first buoyancy chamber 25 via the buoyancy chamber connection portion 27.

In the undulating gate 1, the lifting force of the door 2 is continuously measured by the lifting force measurement unit 32. As described above, when the door body 2 comes to have a predetermined levitation force by replenishing the second buoyancy chamber 26 with air from the underwater storage portion 51, the door is obtained based on the output from the levitation force measurement portion 32. It is determined that the body 2 is in a moored state having a predetermined lift. When the door 2 is in a moored state having a predetermined lift force, the supply of air from the underwater storage unit 51 to the second buoyancy chamber 26 is stopped. Further, air is supplied to the underwater storage unit 51 by the compressor 52 of the air supply unit 5 and stored in the underwater storage unit 51. In addition, even after the door 2 is in the moored state having a predetermined lift force, the air discharge port of the underwater storage unit 51 is slightly opened, and the air that is slowly leaked from the underwater storage unit 51 is the second buoyancy chamber 26. May be supplied continuously.

As described above, the relief gate 1 includes the door 2 and the mooring portion 31. The door 2 stands up and falls when the movable end 24 pivots with the support end 23 disposed at the bottom of the water as a fulcrum. The mooring portion 31 moors the door 2 to the bottom of the water. The door 2 includes a first buoyancy chamber 25, a second buoyancy chamber 26, and a buoyancy chamber connection 27. The first buoyancy chamber 25 is disposed between the movable end 24 and the support end 23. The second buoyancy chamber 26 is disposed between the first buoyancy chamber 25 and the support end 23. The buoyancy chamber connection portion 27 opensably connects the first buoyancy chamber 25 and the second buoyancy chamber 26. The buoyancy chamber connection portion 27 is opened in the over-falling state in which the door 2 is folded more than the mooring state in which the door 2 is moored to the mooring portion 31.

As a result, the door 2 that has fallen from the upright state can be promptly returned to the moored state (that is, the standby state in which the door can be stood up). As a result, the function loss period (that is, the period in which the door 2 can not be raised) of the relief gate 1 can be shortened, and the safety of the harbor where the relief gate 1 is installed can be improved.

As described above, in the undulating gate 1, the air in the first buoyancy chamber 25 is replaced with water in the door 2 in the upright state, so that the door 2 is more moored than in the moored state anchored to the mooring portion 31. Transition to a fallen overfall state. When the door 2 is in the overturned state, the buoyancy chamber connection 27 is opened, and part of the air in the second buoyancy chamber 26 moves to the first buoyancy chamber 25 via the buoyancy chamber connection 27. Do. And, by moving the door 2 from the overturned state to the moored state, the buoyancy chamber connection portion 27 is closed. Thus, as described above, the door 2 that has fallen from the upright state can be quickly returned to the moored state. As a result, the function loss period of the undulation gate 1 can be shortened, and the safety of the port or the like where the undulation gate 1 is installed can be improved.

The relief gate 1 further includes a door contact portion 4 installed at the bottom of the water. The buoyancy chamber connection 27 includes a partition opening 271 and a partition gate 272. The partition opening 271 is provided in the partition 270 between the first buoyancy chamber 25 and the second buoyancy chamber 26. The partition gate 272 overlaps the partition opening 271 and closes the partition opening 271. When the door 2 is in an overturned state, the door contact portion 4 contacts the partition gate 272 and moves the partition gate 272 from a position overlapping the partition opening 271. Thus, the buoyancy chamber connection 27 is opened. As described above, in the undulating gate 1, the buoyancy chamber connection 27 can be automatically opened without power by using the change in the attitude of the door 2. As a result, the structure of the undulating gate 1 can be simplified as compared with the case where the opening mechanism of the buoyancy chamber connection portion 27 is remotely driven by electric power or the like. Also, the failure rate of the relief gate 1 can be reduced.

In the undulating gate 1, the door 2 is in the overturned state and the buoyancy chamber connection portion 27 is opened, whereby the door 2 shifts from the overturned state to the moored state. Thus, in the undulating gate 1, the door 2 can be promptly returned to the moored state without supplying air from the outside to the door 2 in the overturned state.

The relief gate 1 further includes an underwater storage unit 51 that stores air at a lower side than the over-falling door 2. The air stored in the water storage portion 51 is used to replenish air to the second buoyancy chamber 26. As described above, since air can be supplied to the second buoyancy chamber 26 only by releasing the air stored in the water storage portion 51 into the water, compared with the case where the air is pumped from land equipment etc., the second The air can be quickly replenished to the buoyancy chamber 26. Moreover, the underwater storage part 51 is opened in the lower side by a covered cylinder shape. Thereby, the required amount of air can be easily stored in the underwater storage unit 51 while simplifying the structure of the underwater storage unit 51.

In the undulating gate 1, an exhaust unit 28 is provided at the upper end portion of the first buoyancy chamber 25 in the door 2 in the upright state, for connecting the first buoyancy chamber 25 and the outside of the door 2 in an openable manner. The position of the exhaust port 285 in the first buoyancy chamber 25 of the exhaust unit 28 is variable with respect to the thickness direction of the door 2. Thus, the amount of air remaining in the first buoyancy chamber 25 can be easily adjusted when the door 2 falls. In other words, when the door 2 falls, the amount of water flowing into the first buoyancy chamber 25 can be adjusted. As a result, an appropriate amount of air necessary for the door 2 to quickly return to the moored state can be left in the first buoyancy chamber 25 of the over-folded state of the door 2. In addition, by leaving an appropriate amount of air in the first buoyancy chamber 25, the falling speed of the door 2 at the time when the door 2 is in an overturned state (that is, at the time of landing on the water bottom of the door 2) It is possible to reduce the impact applied to the door 2 at the time of landing.

In the undulating gate 1, for example, it is conceivable that the sediment carried by the water flow and the like is accumulated on the door 2 in a moored state, and the floating force of the door 2 is reduced. In this case, the measurement value of the lifting force of the door 2 output from the lifting force measurement unit 32 decreases. When the measured value is less than a predetermined threshold value, air is supplied from the air supply unit 5 to the first buoyancy chamber 25. Specifically, the air discharge port of the water reservoir 51 is opened, and air is supplied to the second buoyancy chamber 26 first. As a result, a small amount of water remaining in the second buoyancy chamber 26 flows out through the second opening 261, and the second buoyancy chamber 26 is filled with air. Then, the air overflowing downward from the second opening 261 (that is, the air overflowing from the inside of the second buoyancy chamber 26 via the second opening 261, and can flow into the second buoyancy chamber 26 from the second opening 261 The air (which was not) is guided by the guide portion 221 along the second main surface 22 to the first opening 251, and is supplied from the first opening 251 to the first buoyancy chamber 25. As a result, the lift of the door 2 is increased. When the measurement value of the levitation force by the levitation force measurement unit 32 becomes equal to or more than the above-described threshold value, the supply of air from the underwater storage unit 51 is stopped.

Thus, the relief gate 1 further includes a lift force measurement unit 32 that measures the lift force of the door 2 in the moored state. As a result, it is possible to check whether the door 2 can be raised without actually raising the door 2. In the undulating gate 1, air is supplied to the first buoyancy chamber 25 when the lift force of the door 2 is less than the predetermined threshold. As a result, even if the floating force of the door 2 is reduced due to dirt and the like accumulated on the door 2, the floating force of the door 2 can be recovered easily and quickly.

As described above, the relief gate 1 further includes the air supply unit 5 that supplies air to the second buoyancy chamber 26. The first buoyancy chamber 25 has a first opening 251 opened to the second main surface 22 of the door 2 (that is, the lower surface of the door 2 in the collapsed state). The second buoyancy chamber 26 has a second opening 261 that opens to the second main surface 22 of the door 2. The second main surface 22 of the door 2 is provided with a guide portion 221 extending from the second opening 261 to the first opening 251. Then, the air supplied from the air supply unit 5 to the second buoyancy chamber 26 overflows downward from the second opening 261, is guided to the guide portion 221, and is supplied from the first opening 251 to the first buoyancy chamber 25. . Thus, the mechanism can be used to supply air to the second buoyancy chamber 26 (that is, the water reservoir 51 or the like), and air can also be supplied to the first buoyancy chamber 25 with a simple structure.

In the above-described relief gate 1, various modifications are possible.

For example, in the exhaust part 28, the structure which changes the position of the exhaust port 285 regarding the thickness direction of the door 2 may be changed variously. For example, in the first buoyancy chamber 25, a plurality of exhaust ports 285 are provided at different positions in the thickness direction of the door 2, and one exhaust port 285 is selectively used among the plurality of exhaust ports 285. Thereby, the position of the exhaust port 285 in the thickness direction of the door 2 may be made variable. In the undulating gate 1, the position of the exhaust port 285 does not necessarily have to be variable, and may be fixed.

The bulkhead gate 272 does not have to be an upper hinged flap gate, but may be a gate of various structures. For example, the partition gate 272 may be a slide gate sliding along the partition 270. Alternatively, the partition gate 272 may be a roller gate having rollers attached on both sides in the width direction and moving along the partition 270 as the roller rotates.

The amount of air supplied from the submersible storage unit 51 to the second buoyancy chamber 26 after the door 2 shifts from the overturned state to the moored state is the first amount of air from the second buoyancy chamber 26 via the buoyancy chamber connection 27. It may be larger than the amount of air moved to the buoyancy chamber 25 (ie, the amount of moving air). In this case, the air overflowing downward from the second opening 261 is, for example, guided by the guide portion 221 along the second main surface 22 to the first opening 251, and from the first opening 251 to the first buoyancy chamber 25. Supplied.

In the above-mentioned example, in the door 2 in the excessively fallen state, the door 2 is moored by moving part of the air of the second buoyancy chamber 26 to the first buoyancy chamber 25 via the buoyancy chamber connection 27. Although it transfers to a state, the door 2 does not necessarily need to transfer to an anchoring state only by the movement of the air between buoyancy chambers. For example, even after part of the air in the second buoyancy chamber 26 moves to the first buoyancy chamber 25 via the buoyancy chamber connection 27, the door 2 may be maintained in the over-collapsed state. In this case, air is supplied from the submersible storage unit 51 to the second buoyancy chamber 26 of the door 2 in the overturned state, whereby the door 2 shifts from the overturned state to the moored state. Alternatively, after the air is supplied from the submersible storage unit 51 to the second buoyancy chamber 26 of the over-folded door 2 and the second buoyancy chamber 26 is filled with air, the air overflowing downward from the second opening 261 is By being guided to the guide portion 221 and being supplied to the first buoyancy chamber 25 from the first opening 251, the door 2 may transition from the over-falling state to the mooring state.

The structure of the guide portion 221 for guiding the air overflowing downward from the second opening 261 to the first opening 251 may be variously changed. For example, a substantially semi-cylindrical member extending in the longitudinal direction may be attached to the second main surface 22 of the door 2 as a guide portion 221 extending from the second opening 261 to the first opening 251. In this case, the air overflowing downward from the second opening 261 is led to the first opening 251 through the substantially semi-cylindrical space between the substantially semi-cylindrical member and the second major surface 22. , And supplied to the first buoyancy chamber 25 through the first opening 251.

The supply of air from the air supply unit 5 to the first buoyancy chamber 25 does not necessarily have to go through the guide portion 221. For example, another underwater storage unit 51 is provided below the first opening 251 of the door 2 in the moored state, and air is directly supplied from the other underwater storage unit 51 to the first buoyancy chamber 25. May be In this case, the guide portion 221 may be omitted.

The shape of the water storage portion 51 does not necessarily have to be in the form of a cylindrical lid that opens downward, and may be variously changed. For example, the underwater storage unit 51 may be an airtight tank that does not open toward the outside. Moreover, the supply of air from the air supply unit 5 to the second buoyancy chamber 26 does not necessarily have to go through the underwater storage unit 51. For example, the air delivered from the compressor 52 may be supplied directly to the second buoyancy chamber 26 via a pipe connecting the compressor 52 and the second buoyancy chamber 26.

The structure of the buoyancy chamber connection 27 may be varied in many ways. The buoyancy chamber connection part 27 may be provided with piping which connects the 1st buoyancy chamber 25 and the 2nd buoyancy chamber 26, for example, and a valve provided in the piping concerned. In this case, when the door 2 is in an overturned state, the door contact portion 4 contacts the drive portion of the valve to open the valve. Thereby, a part of the air in the second buoyancy chamber 26 moves to the first buoyancy chamber 25. And when the door 2 transfers to a mooring state from an overturned state, the door contact part 4 will be separated from the drive part of the said valve, and a valve will be closed.

Further, the opening and closing of the buoyancy chamber connection 27 need not necessarily be performed by the contact and separation of the door contact 4. For example, a sensor for detecting whether or not the door 2 is in the over-falling state is provided in the box 11 or the like, and when the sensor detects that the door 2 is in the over-falling state, the above-described valve The drive unit (for example, a motorized valve) may be driven based on the output from the sensor to open the valve. Then, when the door 2 shifts from the overturned state to the moored state, the drive portion of the valve is driven based on the output from the sensor, and the valve is closed.

The above-described structure of the air supply unit 5 is applicable if it is a bottom-mounted undulating gate having one or more buoyancy chambers in the door body. The water bottom installation type hoisting gate includes a door body which stands up and falls when the movable end portion is pivoted around a supporting end portion disposed on the water bottom, and an air supply unit which supplies air to the door body. . The door includes a buoyancy chamber disposed between the movable end and the support end. The said air supply part is provided with the underwater storage part opened below with a covered cylindrical shape which stores air on the lower side than the door in the fallen state. Then, the air stored in the underwater storage portion is supplied to the buoyancy chamber of the door which is in the lying state.

As described above, in the bottom-mounted undulation gate, air can be supplied to the buoyancy chamber only by releasing the air stored in the water storage section into the water, and therefore, compared to the case where the air is pumped from land equipment or the like. Air can be quickly supplied to the fallen door. In addition, the required amount of air can be easily stored in the underwater storage while simplifying the structure of the underwater storage. In addition, the mooring part which moors a door body may be provided in the said water bottom installation type undulation gate, and does not need to be provided. In addition, the number of buoyancy chambers may be one or two or more.

The configurations in the above embodiment and each modification may be combined as appropriate as long as no contradiction arises.

Although the invention has been described and described in detail, the foregoing description is illustrative and not restrictive. Accordingly, numerous modifications and variations are possible without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 undulation gate 2 door 4 door contact part 5 air supply part 22 2nd main surface (of door) 23 support end 24 movable end 25 1st buoyancy room 26 2nd buoyancy room 27 buoyancy room connection part 28 exhaust air Part 31 mooring part 32 levitation force measuring part 51 underwater storage part 221 guide part 251 first opening 261 second opening 270 partition 271 partition opening 272 partition gate 285 exhaust port

Claims

A door body that stands up and falls when the movable end pivots about a supporting end disposed at the bottom of the water;
And a mooring section for mooring the door body to the bottom of the water.
The door is
A first buoyancy chamber disposed between the movable end and the support end;
A second buoyancy chamber disposed between the first buoyancy chamber and the support end;
A buoyancy chamber connecting portion for openably connecting the first buoyancy chamber and the second buoyancy chamber;
Equipped with
The buoyancy chamber connection is opened in an overturned state in which the door body is laid down more than in a moored state where the door body is moored to the mooring portion.
A door body that stands up and falls when the movable end pivots about a supporting end disposed at the bottom of the water;
And a mooring section for mooring the door body to the bottom of the water.
The door is
A first buoyancy chamber disposed between the movable end and the support end;
A second buoyancy chamber disposed between the first buoyancy chamber and the support end;
A buoyancy chamber connecting portion for openably connecting the first buoyancy chamber and the second buoyancy chamber;
Equipped with
In the door in the upright state, the air in the first buoyancy chamber is replaced with water, whereby the door is shifted to an overturned state which is more laid than the moored state moored to the mooring portion,
When the door is in the over-collapsed state, the buoyancy chamber connection is opened, and part of the air in the second buoyancy chamber is moved to the first buoyancy chamber via the buoyancy chamber connection. ,
The buoyancy chamber connection is closed by the transition of the door from the overturned state to the moored state.
A bottom mounted undulation gate according to claim 1 or 2,
It further has a door contact part installed at the bottom of the water,
The buoyancy chamber connection is
A partition opening provided in a partition between the first buoyancy chamber and the second buoyancy chamber;
A partition gate overlapping the partition opening to close the partition opening;
Equipped with
When the door is in the over-collapsed state, the door contact portion contacts the partition gate to move the partition gate from a position overlapping the partition opening, and the buoyancy chamber connection is opened.
A bottom mounted relief gate according to any one of claims 1 to 3, comprising:
When the door is in the over-collapsed state and the buoyancy chamber connection portion is opened, the door is shifted from the over-collapsed state to the moored state.
A bottom mounted relief gate according to any one of claims 1 to 4, comprising:
The water storage unit further includes an underwater storage unit that stores air on the lower side of the door in the excessively fallen state,
The air stored in the underwater storage unit is used to replenish air to the second buoyancy chamber.
A bottom mounted relief gate according to any one of claims 1 to 5, comprising:
It further comprises a levitation force measurement unit that measures the levitation force of the door in the moored state,
If the lift force of the door is less than a predetermined threshold, air is supplied to the first buoyancy chamber.
A bottom mounted relief gate according to any one of claims 1 to 6, comprising:
The air conditioner further comprises an air supply unit for supplying air to the second buoyancy chamber,
The first buoyancy chamber has a first opening that opens to the lower surface of the door;
The second buoyancy chamber has a second opening that opens to the lower surface of the door;
A guide portion extending from the second opening to the first opening is provided on the lower surface of the door body,
Air supplied from the air supply unit to the second buoyancy chamber overflows downward from the second opening, is guided to the guide unit, and is supplied from the first opening to the first buoyancy chamber.
A bottom mounted relief gate according to any one of the preceding claims, wherein
The upper end portion of the first buoyancy chamber of the door in the upright state is provided with an exhaust unit that can openably connect the first buoyancy chamber and the outside of the door;
The position of the exhaust port in the first buoyancy chamber of the exhaust unit is variable with respect to the thickness direction of the door.
It is a bottom-mounted undulation gate,
A door body that stands up and falls when the movable end pivots about a supporting end disposed at the bottom of the water;
An air supply unit for supplying air to the door;
Equipped with
The door includes a buoyancy chamber disposed between the movable end and the support end;
The air supply unit includes a submerged cylindrical opening in the form of a lidded cylinder which stores air on the lower side of the door in a collapsed state, and which is open downward.
The air stored in the underwater storage portion is supplied to the buoyancy chamber of the door in the collapsed state.