JP2002309562A - Watertight mechanism for stream bed of low-water-depth gate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a watertight mechanism for the bottom of a low-water- depth gate being moved away from a door during sliding movement to reduce resistance while preventing foreign matter from entering from its top. SOLUTION: The mechanism includes a seal member 35 having a stream bed watertight part 31 provided to be capable of making contact with a gate body 14, for closing a space between the gate body 14 and the bottom of water, so that by bringing the watertight part into contact with the gate body 14, the space between the gate body 14 and the bottom of water is closed, and a water pressure introducing part 39 provided on the side of the seal member 35 opposite from the gate body 14 for pressing the seal member 35 into contact with the gate body 14 by introducing water pressure. The mechanism also includes a water pressure control part for controlling the water pressure introduced into the water pressure introducing part 39 to switch the seal member 35 between a condition in which it is in contact with the gate body 14 and a condition in which it is moved away from the gate body 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottom watertight mechanism for a low water depth gate provided in a river.

[0002]

2. Description of the Related Art As a gate disposed on a river or the like, a gate body having a door body erected between a pair of rotatably supported supporting disks is provided, and the water level is adjusted by rotating the gate body. There is a revolving gate that does the same. In this rotary gate, as a driving mechanism for rotating the gate body, for example, as shown in Japanese Utility Model Laid-Open No. 5-10522, a rack gear is provided on the outer peripheral surface of a supporting disk, and a pinion gear meshing with the rack gear is driven by a motor. There is a rack and pinion type that rotates the gate body by rotating the gate body, and a type that rotates the gate body using a hydraulic cylinder and a link mechanism.

When the water level is adjusted, it is necessary to ensure watertightness around the gate body. Therefore, a bottom watertight portion is provided between the gate body and the water bottom, and the gap between the gate body and the side wall is provided. Is provided with a side watertight part. The bottom watertight part and the side watertight part are always kept watertight while the water level is being adjusted.

[0004]

If the watertightness is always maintained while the water level is being adjusted in this way, naturally, no water flow occurs between the gate body and the water bottom. As a result, earth and sand may accumulate between them. As described above, if the earth and sand accumulate between the gate body and the water bottom, the rotation of the gate body becomes a resistance, and in some cases, the gate body may not be able to rotate. Further, at the time of sliding, the friction of the watertight rubber is generated, which increases the opening / closing force and may cause entrapment of earth and sand and dust. However, rotating the gate body one by one in order to flow the sediment accumulated between the gate body and the water bottom has a problem that it takes time and effort.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a bottom watertight mechanism for a low-water-deep river gate which is separated from a door body during sliding to reduce resistance and prevent foreign substances from entering.

[0006]

In order to achieve the above object, a bottom watertight mechanism of a low water depth gate according to claim 1 of the present invention comprises a low water depth gate provided in a river, wherein the bottom watertight part is A seal member that is provided so as to be able to contact the gate body and closes a gap between the gate body and the water bottom by contacting the gate body, and a water pressure is provided on the opposite side of the seal member with respect to the gate body. A water pressure introducing portion that presses the seal member toward the gate body side by contacting with the gate body, and controls the water pressure introduced into the water pressure introducing portion to move the seal member to the gate. A water pressure control unit is provided for switching between a state of contact with the main body and a state of being separated from the gate main body.

[0007] Thus, usually, the water pressure control section controls the water pressure introduced into the water pressure introduction section, so that the seal member is brought into contact with the gate body to close the gap between the gate body and the water bottom, and the gate is closed. When the accumulated sediment flows between the main body and the water bottom, the water pressure control unit controls the water pressure introduced into the water pressure introduction unit, thereby separating the seal member from the gate main body and closing the gap between the gate main body and the water bottom. It is opened and a water flow is generated in this gap, and the accumulated sediment flows. Therefore, the gate main body can be moved without involving the rotation of the gate main body.

According to a second aspect of the present invention, there is provided a bottom watertight mechanism for a low water depth gate according to the first aspect, wherein the water pressure control section has a tank for storing water, and the tank and the water pressure introduction section. And a hydraulic pressure generated by the height of the water stored in the tank is introduced into the hydraulic pressure introducing portion to bring the seal member into contact with the gate body, while the tank and the hydraulic pressure introduction are performed. The seal member is separated from the gate main body by interrupting communication with the gate and introducing atmospheric pressure into the hydraulic pressure introducing portion.

Thus, normally, the water pressure control section introduces the water pressure generated by the height of the water stored in the tank into the state where the tank and the water pressure introduction section are in communication with each other, and seals the water pressure introduction section. When the member is brought into contact with the gate body, the gap between the gate body and the water bottom is closed, and when sediment accumulated between the gate body and the water bottom flows, the water pressure control unit includes the tank and the water pressure introduction unit. In addition to shutting off the communication, the pump is usually used to store water in the tank. It is possible to open the gap between the gate body and the water bottom by separating, and to eliminate the resistance with the door body. As described above, since the water pressure generated by the height of the water stored in the tank is introduced into the water pressure introduction unit, no power is required at all times, and the configuration of the water pressure control unit is simplified.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. Rotary gate 10 of the present embodiment
As shown in FIG. 1, is disposed in a river 11 to adjust the water level, and the like. A door 13 is integrally provided between a pair of rotatably supported support disks 12, 12. A gate body 14 provided on both the left and right sides of the gate body 14 and rotating the gate body 14 to
It has drive mechanisms 15 and 15 for raising and lowering 3, and a control device 16 that controls the drive mechanisms 15 and 15 when an operation is input by an operator.

A concrete recess 17 which forms the bottom of the river 11 in which the gate body 14 is disposed has a bottom recess 18 which is formed in a cylindrical shape and has a central axis in the width direction of the river. The pair of concrete casting portions 19, 19 forming both sides of the base 11 also have side recesses 20 that are recessed in a substantially circular shape so as to form a continuous cylindrical surface on both sides of the bottom recess 18.

A pair of support disks 12, 1 of the gate body 14
As shown in FIGS. 2 to 4, each of the support shafts 2 is provided with a support shaft 22 projecting to one side at the center.
2 and is rotatably supported by a bearing 23 disposed in the concrete casting portion 19 of the river 11. The pair of support disks 12, 12 are coaxial with each other while being supported by the concrete pouring portions 19, 19, respectively.
In the axial direction, almost entirely enters the side recess 20 of the concrete casting portion 19, and the lower portion enters the bottom recess 18 with a slight clearance from the bottom recess 18 of the concrete casting portion 17. I have.

The door body 13 has a shape as shown in FIGS. 1 and 5, and has an arcuate curved plate portion 25 having a long shape in the axial direction, and is arranged substantially in parallel with the curved plate portion 25. A flat plate portion 26 to be formed, and one end side of the plate portion 26,
A flat notch plate portion 27 that extends to the curved plate portion 25 in an inclined state with respect to the flat plate portion 26 to make the door body 13 cut out, and the other end of the flat plate portion 26 and the curved plate portion 25 And an arcuate plate 28 that connects the sides. A protruding plate portion 29 is provided on the side of the notch plate portion 27 of the curved plate portion 25 so as to protrude outward from the notch plate portion 27 along the circumferential direction of the curved plate portion 25.

The door 13 has both ends in the length direction fixed to the support disks 12, 12 such that the curved plate portion 25 matches the outer peripheral surfaces of the pair of support disks 12, 12. . When the door 13 is located at the most riverbed side, that is, at the side of the concrete casting section 17, the cutout plate portion 27 and the protruding plate portion 29 are located at the downstream side, and the flat plate portion 26 has the lowest flow. They are arranged to be parallel.

As shown in FIG. 6, a portion of the concrete casting portion 17 on the upstream side of the bottom concave portion 18 is brought into contact with the outer peripheral surface of the gate body 14 in the area where the door 13 is provided in the circumferential direction. , A bottom watertight portion 31 for closing a gap between the gate body 14 and the bottom concave portion 18 is provided.

The bottom watertight portion 31 has a shape protruding downstream on the upstream side, and its tip comes into contact with the outer peripheral surface of the gate body 14 in the area where the door 13 is provided in the circumferential direction. A dustproof plate 32 made of a rubber material for preventing earth and sand from entering the bottom watertight portion 31 is provided.

The bottom watertight portion 31 has a plate-like base 33 and a protrusion 34 projecting from the base 33 on the downstream side of the dustproof plate 32.
Water-tight rubber (seal member) that closes the bottom recess 18, that is, the gap between the water bottom and the gate body 14 by contacting the outer peripheral surface of the area where the door 13 is provided in the circumferential direction of
35, and a cover 36 that covers the outside of the base 33 while allowing the projection 34 of the watertight rubber 35 to pass therethrough.

Here, on the opposite side of the gate body 14 of the watertight rubber 35, there is provided a water pressure introduction section 39 for introducing a water pressure higher than the water pressure applied to the watertight rubber 35 from the river 11 by a water pressure control section 38 described later. Have been.

When a high water pressure is introduced into the water pressure introducing portion 39, the base portion 33 of the watertight rubber 35 is pressed by the water pressure as shown in FIG. The portion 34 is protruded from the cover 36 to a large extent, and is brought into contact with the outer peripheral surface of the gate body 14 in the area where the door 13 is provided in the circumferential direction, so that the gap between the gate body 14 and the bottom recess 18 is sealed. Closed.

On the other hand, when the water pressure of the water pressure introducing portion 39 decreases, the bottom watertight portion 31 is deformed in a direction in which the base 33 of the watertight rubber 35 is separated from the gate body 14 by the water pressure applied from the river 11 as shown in FIG. Cover 36 of projection 34
The amount of protrusion from the Then, the protruding portion 34 separates from the outer peripheral surface of the gate body 14 in the circumferential direction of the gate body 14 in the area where the door 13 is provided, and the gate body 14 and the bottom recess 18 are in an open state where a gap is formed. As described above, when a gap is formed between the gate body 14 and the bottom concave portion 18, the dustproof plate 32
Is deformed by water pressure, and a water flow passing through the gap is generated.

The water pressure control section 38 controls the water pressure introduced into the water pressure introduction section 39 to bring the watertight rubber 35 into contact with the outer peripheral surface of the gate body 14 in the circumferential direction in the area where the door 13 is provided. And the state in which the watertight rubber 35 is separated from the outer peripheral surface of the area where the door 13 is provided in the circumferential direction of the gate body 14.
As shown in FIG. 8, the water pressure control unit 38 is disposed at a predetermined height above the river 11 and stores the water in the tank 4.
A pipe 42 having one end communicating with the inside of the tank 41 and the other end communicating with the hydraulic pressure introducing portion 39; and a piping 43 having one end communicating with the hydraulic pressure introducing portion 39 and opening the other end above the tank 41. An atmosphere pipe 44 connected to one of the pipes 42 so that air can be introduced, an atmosphere opening / closing valve 45 for opening / closing the atmosphere pipe 44, and an opening / closing valve 46 for opening / closing the pipe 42 between the atmosphere pipe 44 and the tank 41. And The water pressure control unit 38 branches off from the pipe 43 and
And a state in which the pipe 47 is closed and the water pressure introducing section 39 is communicated with the tank 41 through the pipe 43 and the water pressure introducing section of the pipe 43 A switching valve 48 for closing the 39 side and switching the tank 41 side to a state of communicating with the river 11 via a pipe 47 or the like;
Pump 4 provided in pipe 43 between tank 8 and tank 41
9.

The water pressure control unit 38 closes the atmosphere opening / closing valve 45 and opens the opening / closing valve 46, and connects the inside of the tank 41 to the water pressure introduction unit 39 via the pipe 42. The water pressure is introduced into the water pressure introduction portion 39 via the pipe 42 by the height of the watertight rubber 35, so that the watertight rubber 35 is provided on the outer peripheral surface of the gate body 14 in the circumferential direction where the door 13 is provided. Then, the bottom watertight portion 31 is closed.

At this time, the switching valve 48 is in a state in which the tank 41 is communicated with the pipe 47. When the pump 49 is driven, the water of the river 11 is pumped up and introduced into the tank 41. The drive of the pump 49 is controlled so that water of a predetermined level or more is always stored in the tank 41.

On the other hand, the on-off valve 46 is closed to shut off the communication between the inside of the tank 41 and the water pressure introducing section 39, and further, the atmospheric on-off valve 45 is opened, and the switching valve 48 connects the water pressure introducing section 39 to the pipe 43. When the pump 49 is driven to communicate with the tank 41 via the
9 and water from the pipe 42 through the pipe 43 to the tank 41
And the atmospheric pressure is introduced into the water pressure introducing section 39. As a result, the watertight rubber 35 is separated from the outer peripheral surface of the gate body 14 in the circumferential direction of the gate body 14 by the water pressure of the river 11, and the bottom watertight portion 31 is opened.

As shown in FIG. 9, each of the concrete placing portions 19 and 19 comes into contact with the outer peripheral surface in the radial direction of the support disk 12 by contacting the upstream side portion of the side concave portion 20 with the support disk 12. A side watertight portion 51 for closing a gap with the recess 20 is provided.

Here, a stepped portion 53 is formed on each of the upstream sides of the recesses 20 on both sides, and the stepped portion 53 has a web 54 and a steel material having an H-shaped cross section having a pair of flanges 55, 55. Is partially buried. Here, the support member 56 is arranged so that the web 54 extends along the direction of the water flow and the pair of flanges 55, 55 are orthogonal to the water flow, and the downstream flange 55 constitutes the upstream side of the side recess 20. are doing. The web 54
A concave portion 57 is formed by the pair of flanges 55, 55 and portions protruding from the web 54 to the same side.

The side watertight portion 51 is provided with a downstream flange 55.
A watertight rubber 60 having a substantially L-shaped cross section is detachably attached to the support disk 12 via a mounting member 59 such as a bolt, and the watertight rubber 60 protrudes downstream and has a tip contacting the outer peripheral surface of the support disk 12. The side recess 20 and the support disk 12
The gap with the outer peripheral surface is always closed.

Here, the mounting cover plate 6 is attached to the support member 56 so as to cover the concave portion 57 on the upstream flange 55.
2 is detachably attached to the mounting cover plate 62. The mounting cover plate 62 protrudes further downstream than the support member 56, and its tip comes into contact with the outer peripheral surface of the support disk 12 so that the side watertight portion 51 is provided from one side. A dustproof plate 63 for preventing earth and sand from entering is attached. In addition, support disk 1
2 has an outer peripheral surface projecting radially outward and having
A dust-proof plate 64 is attached over the entire circumference to prevent earth and sand from entering the side watertight portion 51 from the opposite side by coming into contact with zero.

By removing the mounting cover plate 62 from the support member 56, the dustproof plate 63 is removed and the watertight rubber 60 can be attached and detached. That is,
By removing the mounting cover plate 62 from the support member 56, the concave portion 57 is exposed, and the mounting member 59 can be attached and detached via the concave portion 57.

Then, the gap between the gate body 14 and the concrete casting section 17 forming the bottom of the river 11 is closed by the closed bottom watertight section 31 and the gate body 14 is closed by the side watertight sections 51 on both sides. The gap between the concrete casting portions 19 and 19 forming both sides of the river 11 is closed, and as a result, the gaps between the gate body 14 and the bottom and both sides of the river 11 are all closed.

As shown in FIG. 4, the support discs 12 on both sides are respectively provided on the opposite sides to the door 13 as shown in FIG.
Rectangular holes 66 formed to have a long shape along the radial direction of
More specifically, three are formed at a pitch of °. In addition,
The support disks 12 on both sides match the phases of the elongated holes 66 with each other.

As shown in FIG. 1, the drive mechanism 15 is provided for each of the support disks 12 on both sides. As shown in FIG. 10, the drive mechanism 15 is a cylinder whose position is fixed along the lateral direction. The cylinder 70 includes a main body 68 and a piston 69 that reciprocates in a lateral direction along the cylinder main body 68 with respect to the cylinder main body 68.

That is, the position of the cylinder 70 is fixed in a state where the cylinder body 68 is arranged along the direction of water flow on the side of the corresponding support disk 12, and the piston 69 is moved relative to the cylinder body 68. It is provided so as to extend to the upstream side, and is hydraulically driven to a state in which the piston 69 protrudes upstream with respect to the cylinder body 68 and a state in which the piston 69 is retracted downstream.

A head 72 is provided at the tip of the piston 69, and the head 72 is supported by a slide table 73 so as to be slidable only in the water flow direction. That is, as shown in FIG. 11, a pair of guide grooves 74, 74 are vertically arranged on the slide table 73 so as to face each other.
A guide body 75 which fits in the guide grooves 74 and 74 and is slidably guided by the guide grooves 74 is provided vertically.

A support pin 77 is fixed to the head 72 so as to project in the direction of the support disk 12. As shown in FIG. 10, a supporting plate-type engaging body 78 having a rectangular parallelepiped shape that engages with the corresponding elongated hole 66 of the supporting disk 12 is rotatably provided at the protruding distal end of the supporting pin 77. The engaging body 78 slides in the elongated hole 66 with its length direction always matching the width direction of the elongated hole 66. It is of course possible to use a roller as the engagement body 78, but it is preferable to use a support plate type in terms of load transmission because it is in surface contact with the elongated hole 66.

Here, the support pins 77 of the head 72
An engagement / disengagement mechanism 80 is provided for engaging and disengaging the engagement body 78 with the elongated hole 66 by moving the support pin 77 in the axial direction. Since the engagement / disengagement mechanism 80 rotates the handle 81 provided on the opposite side to the engagement body 78 of the support pin 77, the engagement body 78 is engaged with the elongated hole 66 or pulled out from the elongated hole 66. is there.

A resting hole 82 is formed in one of the supporting disks 12 at a center position between the elongated holes 66 adjacent to each other in the circumferential direction. Is provided with a pause mechanism 83 which is engaged with the pause hole 82 to regulate the rotation of the gate body 14.

The resting mechanism 83 includes a resting pin 84 provided so as to protrude in the direction of the support disk 12, and an engaging and disengaging mechanism 85 for moving the resting pin 84 in the axial direction to engage and disengage with the resting hole 82. And This engagement / disengagement mechanism 85
By rotating the handle 86, the rest pin 84 is engaged with the rest hole 82 or pulled out from the rest hole 82. Note that the suspension mechanism 83 is connected to one of the slide tables 7.
3 (the slide table 73 on the side where the pause mechanism 83 is not provided) is not shown.

Here, the slide table 73 and the bearing 23 supporting the gate body 14 are connected by a connecting member 87 as shown in FIGS. 2 and 3, whereby the gate body 14, the bearing 23 And the slide 73 are all connected,
Loads are transmitted inside these. As a result, the load can be easily managed as compared with the case where the bearing 23 and the slide table 73 are separately fixed to the concrete casting portion 19.

Next, the operation of the rotary gate 10 having the above configuration will be described with reference mainly to the schematic diagrams of FIGS. First, as shown in FIG. 12 (a), predetermined elongated holes 66, 66 in which the phases of the two support disks 12, 12 match.
When the pistons 69 of the respective cylinders 70 of the drive mechanisms 15 and 15 are made to protrude most from the cylinder body 68 in a state where the respective engagement bodies 78 of the both drive mechanisms 15 and 15 are engaged with each other, the door body Numeral 13 positions the flat plate portion 26 located closest to the bottom recess 18 and located at this time on the upper side at the lowest position and parallel to the water flow. This state is a fully opened state in which the door 13 maximizes the flow area of the water flow. In this manner, the angle of the gate body 14 that brings the door 13 into the fully open state is set to 0 °.

From this fully opened state, as shown in FIG.
Are simultaneously driven to bring the pistons 69 to a predetermined position, the respective heads 72 are guided by the corresponding slides 73 and move from the upstream side to the downstream side, and the respective engaging bodies 78 which cannot move up and down are moved. The long hole 66 is moved toward the cylinder body 68 while moving within the long hole 66 to be engaged, and the gate body 14 is rotated (specifically, the gate body 14 is rotated by 70 ° with respect to the fully opened state). As a result, the door 13
It is in a state of rising from the bottom concave portion 18 above the water surface of the river 11. This state is a fully closed state in which the door 13 has a water flow channel area of zero.

The rotational position of the gate body 14 is adjusted by controlling the amount of protrusion of the piston 69 of the cylinder 70 of each of the two drive mechanisms 15 and 15 so that the fully open state and the fully closed state described above are adjusted. In between, the angle of the door 13 is adjusted, the amount of flowing water passing through the rotary gate 10 is adjusted, and the water level is adjusted. For example, as shown in FIG.
Rises obliquely at a predetermined angle, so that the water flow
Or overflow condition. When the water level is adjusted by positioning the gate body 14 between the fully open state and the fully closed state, the water pressure control unit 38 closes the atmosphere on-off valve 45 and opens the on-off valve 46. Then, the water pressure is introduced from the tank 41 to the water pressure introducing portion 39 via the pipe 42 by the height thereof, and as a result, the watertight rubber 35 is moved in a range where the door 13 in the circumferential direction of the gate body 14 is provided. It is brought into contact with the outer peripheral surface, and the bottom watertight part 31 is closed.

On the other hand, when it becomes necessary to perform flushing for removing sediment accumulated in the gap between the gate body 14 and the bottom recess 18, for example, the gate body 14 located between the fully opened state and the fully closed state is left as it is. In this state, the water pressure control unit 38 closes the on-off valve 46 and opens the atmospheric on-off valve 45, and the water pressure introduction unit 39
The pump 49 is driven in a state where the pump 49 is in communication with the pump via the pipe 43. Then, water is pumped from the water pressure introducing section 39 and the pipe 42 to the tank 41 via the pipe 43, and the water pressure introducing section 39 is brought to the atmospheric pressure. As a result, the watertight rubber 35 is moved to the door body in the circumferential direction of the gate body 14. 13 can be separated from the outer peripheral surface in the area where the bottom 13 is provided, and the bottom watertight portion 31 is opened by water pressure. Then, a water flow is generated between the gate main body 14 and the bottom concave portion 18, and the sediment accumulated between them flows to the downstream side.

In the case where the amount of sediment deposited is large, for example, as shown in FIG.
For each cylinder 70 at the same time
Is most retracted, the respective heads 72 are guided by the corresponding slides 73 and move from the upstream side to the downstream side, and rotate the gate body 14 via the engagement body 78 (specifically, the fully open state). Rotated by 90 °). As a result, the door body 13 is in a state in which the upper part protrudes from the water surface of the river 11 and the lower part is largely separated from the bottom recess 18 irrespective of the state of the bottom watertight part 31. Then, a water flow is generated between the gate body 14 and the bottom recess 18, and the bottom recess 1 is formed.
The sediment accumulated in 8 will flow to the downstream side.

Depending on the sedimentation state of the earth and sand, only the flushing by opening the bottom watertight part 31 described above, the flushing by opening the lower part with the rotation of the gate body 14 described above is performed, Of course, it is also possible to perform the flushing by opening the bottom watertight part 31 and then perform the flushing by opening the lower part with the rotation of the gate body 14 described above.

Next, when performing maintenance, FIG.
As shown in FIG. 3 (a), the two drive mechanisms 15, 20 are inserted into the predetermined slots 66, 66 where the phases of the support disks 12, 12 coincide with each other.
15 and the respective cylinders 70 of both drive mechanisms 15, 15 with the respective engagement bodies 78 of both
At the same time, the piston 69 is brought into the most retracted state. Then, the gate body 14 is in a state similar to the state at the time of the flushing by the lower opening with the rotation described above (specifically, a state in which the gate body 14 is rotated by 90 ° with respect to the fully opened state). Then, in this state, the resting pin 84 of the resting mechanism 83 is inserted into the resting hole 82 of the support disk 12 at which the handle 8 is positioned at this time.
6 is engaged by the operation. Then, the pause mechanism 83 regulates the rotation of the gate body 14.

In this state, as shown in FIG.
The engaging bodies 78 of the two drive mechanisms 15 are pulled out of the elongated holes 66 of the support disk 12 by operating the handle 81 of the engaging / disengaging mechanism 80. Then, as shown in FIG. 13C, the respective cylinders 70 of both drive mechanisms 15, 15 are driven to bring the piston 69 from the cylinder body 68 to the maximum. Subsequently, in this state, both cylinders 7
The respective engaging members 78 of 0 and 70 are engaged with the next elongated hole 66 adjacent to the supporting disk 12 in the rotational direction of the corresponding supporting disk 12 by operating the handle 81 of the engaging / disengaging mechanism 80.

Next, as shown in FIG. 13D, the rest pin 84 of the rest mechanism 83 is pulled out of the rest hole 82 of the support disk 12 by operating the handle 86. And FIG.
As shown in (e), the respective cylinders 70 of both drive mechanisms 15, 15 are simultaneously driven to retract the piston 69. Then, the respective heads 72 of both drive mechanisms 15, 15 are guided by the corresponding slides 73, move from the upstream side to the downstream side, and move through the engagement body 78 to the gate body 1.
4 is further rotated (for example, 135 ° is rotated with respect to full opening). As a result, the door 13 is further protruded from the water surface of the river 11. In this manner, the maintenance is performed with the door 13 protruding from the water surface of the river 11.

Further, if necessary, as shown in FIG. 13 (f), the pistons 69 of the respective driving mechanisms 15, 15 are simultaneously brought into the most retracted state, and the gate body 14 is further rotated (fully opened). For example, by 180 °). As a result, the entirety of the door 13 rises completely above the water surface of the river 11.
In this manner, the maintenance can be performed by completely lifting the door 13 from the water surface.

After the maintenance is completed, the operation is performed in the reverse order to the above, so that the gate body 14 does not disengage the drive mechanisms 15, 15 with respect to the support disks 12, 12, as described above. Also returns to the rotatable state from the fully open state to the state where flushing is performed.

As described above, the reciprocating position by the driving of the cylinder 70 without engaging and disengaging the elongated hole 66 of the piston 69 is set in the fully opened state in which the door 13 is substantially along the water bottom and in the fully opened state in which the door 13 is substantially perpendicular to the water bottom. The closed state, and further, the flushing state in which the door body 13 is separated from the water bottom, and the maintenance state in which the door body 13 is exposed to the water by driving the cylinder 70 which is engaged with and disengaged from the long hole 66 of the piston 69. You have set. For this reason, the water level adjustment and flushing by frequently raising and lowering the door 13 can be performed without removing and attaching the piston 69, and only infrequent maintenance can be accompanied by removing and attaching the piston 69. As a result, the work required to remove and attach the piston 69 can be minimized.

According to the above-described embodiment, in a normal state, that is, in a state where the gate body 14 is located between the fully opened state and the fully closed state, the water pressure control section 38 controls the water pressure introduction section 39 of the bottom watertight section 31. The water pressure to be introduced is controlled (specifically, the water pressure generated by the height of the water stored in the tank 41 is introduced into the water pressure introduction unit 39 by keeping the inside of the tank 41 and the water pressure introduction unit 39 in communication with each other. Do)
The watertight rubber 35 is brought into contact with the outer circumferential surface of the gate body 14 in the circumferential direction of the area where the door 13 is provided to close the gap between the gate body 14 and the bottom recess 18, that is, the water bottom, and the gate body 14 and the water bottom are closed. When flowing the sediment accumulated between the water pressure control section 38 and the water pressure control section 38, the water pressure control section 38 controls the water pressure introduced into the water pressure introduction section 39 (specifically, the communication between the inside of the tank 41 and the water pressure introduction section 39 is cut off). Atmospheric pressure is introduced into the water pressure introducing portion 39) to separate the watertight rubber 35 from the outer peripheral surface of the gate body 14 in the circumferential direction of the area where the door body 13 is provided, thereby forming a gap between the gate body 14 and the water bottom. It is opened and a water flow is generated in this gap, and the accumulated sediment flows. Therefore, the sediment accumulated between the gate body 14 and the bottom of the water can be caused to flow without rotating the gate body 14.

Therefore, sediment accumulated between the gate body 14 and the bottom recess 18, that is, the bottom of the water, can be flowed without any trouble and time.

Further, since the water pressure generated by the height of the water stored in the tank 41 is introduced into the water pressure introducing section 39, the configuration of the water pressure control section 38 is simplified. Therefore, the cost of the water pressure control unit 38 can be reduced.

In the above embodiment, the case where the drive mechanism 15 is provided on each of the left and right sides of the gate body 14 has been described as an example. However, if the drive force is sufficient, the drive mechanism 15 is provided on only one of the gate bodies. You may do it.

Also, as in the above embodiment, the gate body 1
When the drive mechanism 15 is provided on each of the left and right sides of
Even if the pause mechanism 83 is not provided, the left and right drive mechanisms 15, 1
By using 5, the rotation restricted state of the gate body 14 when the piston 69 is disengaged can be created.

That is, as shown in FIG. 14 (a), when the respective cylinders 70 of both drive mechanisms 15, 15 are simultaneously driven to retract the piston 69 into the cylinder body 68, the engaging member 78 rotates the gate body 14. In FIGS. 14A to 14C, the upper cylinder 70 indicates one (eg, left) cylinder 70, and the lower cylinder 70 indicates the other (eg, right) cylinder 70. Then, the engagement body 78 of the piston 69 is removed from the elongated hole 66 of only the other drive mechanism 15 while keeping the piston 69 of the one drive mechanism 15 as it is, and the piston 69 is protruded as shown in FIG. The engaging body 78 is engaged with the next elongated hole 66 adjacent to the removed elongated hole 66 on the rear side in the rotation direction. Next, as shown in FIG. 14C, the other drive mechanism 1
5 without changing the piston 69, and the one drive mechanism 1
5 only, the engagement body 78 of the piston 69 is
Remove from At this time, the rotation of the gate body 14 is restricted by the other drive mechanism 15. Then, the piston 69 of the one drive mechanism 15 is made to protrude,
As shown in (d), the removed long hole 66 is engaged with the next long hole 66 which is adjacent on the rear side in the rotation direction. Next, the respective cylinders 70 of both drive mechanisms 15 are simultaneously driven to retract the piston 69 into the cylinder body 68 as shown in FIG. Then, both drive mechanisms 15, 1
The respective heads 72 of No. 5 are guided by the corresponding slides 73 and move from the upstream side to the downstream side to further rotate the gate main body 14 through the engaging body 78 (for example, 1
Rotate 35 °). As a result, the door 13 is
From the water surface. In this manner, the maintenance is performed with the door 13 protruding from the water surface of the river 11.

Further, if necessary, as shown in FIG. 14 (f), the pistons 69 of the respective cylinders 70 of both drive mechanisms 15, 15 are simultaneously brought into the most retracted state, and the gate body 14 is further rotated (fully opened). For example, by 180 °). As a result, the entirety of the door 13 rises completely above the water surface of the river 11.
In this manner, the maintenance can be performed by completely lifting the door 13 from the water surface.

Here, also in this case, similarly to the above, the cylinder 70 which does not engage with or disengage from the long hole 66 of the piston 69.
The reciprocation position by the driving of the door 13 is set to a fully open state in which the door 13 is substantially along the water bottom, a fully closed state in which the door 13 is substantially perpendicular to the water bottom, and a flushing state in which the door 13 is separated from the water bottom. It is set so as to be in a maintenance state in which the door body 13 is exposed to the water by driving the cylinder 70 with engagement and disengagement with the long hole 66 of the 69. For this reason,
The water level adjustment and flushing by frequently raising and lowering the door body 13 can be performed without removing and installing the piston 69, and only infrequent maintenance can be accompanied by removing and installing the piston 69. As a result, The work required to remove and attach the piston 69 can be minimized. In addition, the pausing mechanism 83 is not required for both of the driving mechanisms 15, 15, so that the cost can be reduced.

[0060]

As described in detail above, claim 1 of the present invention
According to the bottom watertightness mechanism of the described low depth gate,
The water pressure control unit controls the water pressure introduced into the water pressure introduction unit, so that the seal member is brought into contact with the gate body to close the gap between the gate body and the water bottom, and when the gate body is driven, the water pressure control unit However, the gate can be driven without resistance by controlling the water pressure introduced into the water pressure introduction unit and moving the seal member away from the gate body. Therefore, it can be driven without resistance during sliding.

According to the bottom watertight mechanism of the low water depth gate according to the second aspect of the present invention, normally, the water pressure control unit is stored in the tank by bringing the tank and the water pressure introduction unit into communication with each other. By introducing the water pressure generated by the height of the water into the water pressure introduction part and bringing the seal member into contact with the gate body,
If the gap between the gate body and the water bottom is closed and sediment collected between the gate body and the water bottom flows, the water pressure control unit cuts off the communication between the tank and the water pressure introduction By introducing the atmospheric pressure, the seal member is separated from the gate main body to open a gap between the gate main body and the water bottom, and a water flow is generated in the gap to flow accumulated sediment. As described above, since the water pressure generated by the height of the water stored in the tank is introduced into the water pressure introduction unit, the configuration of the water pressure control unit is simplified.

Therefore, the cost of the water pressure control unit can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a rotary gate according to an embodiment of the present invention.

FIG. 2 is a front sectional view showing a support disk and the like of a rotary gate according to an embodiment of the present invention.

FIG. 3 is a plan sectional view showing a gate body and the like of a rotary gate according to an embodiment of the present invention.

FIG. 4 is a side sectional view showing a support disk and the like of a rotary gate according to an embodiment of the present invention.

FIG. 5 is a side sectional view showing a gate body and the like of a rotary gate according to an embodiment of the present invention.

6 is an enlarged side sectional view of a portion B shown in FIG. 5 showing a bottom watertight portion and the like of the rotary gate in a closed state according to one embodiment of the present invention.

FIG. 7 is an enlarged sectional side view of a portion B shown in FIG. 5 showing a bottom watertight portion and the like of the rotary gate according to the embodiment of the present invention in an open state.

FIG. 8 is a configuration diagram of a water pressure control unit of the rotary gate according to one embodiment of the present invention.

FIG. 9 is an enlarged plan sectional view of a portion A in FIG. 3 showing a side watertight portion and the like of the rotary gate according to the embodiment of the present invention.

FIG. 10 is a side view showing a rotary gate drive mechanism and the like according to an embodiment of the present invention.

FIG. 11 is a front sectional view showing a driving mechanism of a rotary gate according to an embodiment of the present invention;

FIG. 12 is a schematic side view illustrating the operation of the rotary gate according to one embodiment of the present invention.

FIG. 13 is a schematic side view illustrating the operation of the rotary gate according to the embodiment of the present invention.

FIG. 14 is a schematic side view illustrating another example of the operation of the rotary gate according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Rotating gate 14 Gate body 15 Drive mechanism 31 Bottom watertight part 35 Watertight rubber (seal member) 38 Water pressure control part 39 Water pressure introduction part 41 Tank

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shin Maekawa 12 Nishikicho, Naka-ku, Yokohama-shi, Kanagawa Prefecture Mitsubishi Heavy Industries, Ltd. Yokohama Works F-term (reference) 2D019 CA13 EA01

Claims (2)

[Claims] At the bottom of a low water depth gate provided in a river, a bottom watertight portion is provided so as to be able to contact the gate body, and seals a gap between the gate body and the water bottom by contacting the gate body. A member, and a water pressure introducing portion that is provided on the opposite side of the seal member with respect to the gate body and presses the seal member toward the gate body side when water pressure is introduced to contact the gate body. A low water depth control unit that controls a water pressure introduced into the water pressure introduction unit to switch between a state in which the seal member is brought into contact with the gate body and a state in which the seal member is separated from the gate body. Watertight mechanism at the bottom of the gate. 2. The water pressure control section has a tank for storing water, and the water pressure generated by the height of the water stored in the tank when the tank is in communication with the water pressure introduction section. Is introduced into the hydraulic pressure introducing portion to bring the sealing member into contact with the gate body, while disconnecting the communication between the tank and the hydraulic pressure introducing portion and introducing atmospheric pressure into the hydraulic pressure introducing portion to thereby form the sealing member. The bottom watertightness mechanism of a low water depth gate according to claim 1, wherein a distance from the gate body is increased.