JP4103046B2 - Pneumatic undulation gate - Google Patents

Description

This invention is a kind of undulating gate used for the purpose of hoisting or discharging the flowing water of a water channel by allowing the door body to stand up or lie down freely by a rotation center provided at the bottom of the water channel, and is a door made of steel plate If you connect compressed air by connecting an air pipe from a land-based air operating device to a rubber-filled air bag made of a flat rectangle located at the base of the body on the downstream side and closed on one side This is a pneumatic hoisting gate in which the air bag expands and the door body is raised, and conversely, if air with pressure is discharged from the air bag, the air bag shrinks flatly and the door body falls. is there.

In the pneumatic undulation gate, the air bag is made of a rectangular rubberized cloth with three sides closed and one side open, and the length of the opened side matches the weir width of the undulation gate. In other words, air bags are distributed over the entire width of the water channel, and the load is not concentrated when supporting the steel plate door body from the downstream side, so the steel plate door body is welded to the folded steel plate or upstream surface. It is a pneumatic undulation gate that is capable of ensuring the necessary strength with a simple structure such as a steel plate reinforced with ribs and is excellent in economic efficiency.

On the other hand, the operation of standing up the steel plate door body with the air bag continues until the air bag becomes cylindrical. Therefore, in the pneumatic undulation gate, tension is applied when the vertical angle of the steel plate door body is about 60 °. Attach a rubber-stretched cloth retaining band for the purpose of stopping the standing operation when it occurs to connect the foundation concrete surface and the downstream surface of the steel plate door body.

And, this cable tie and air bag are made of rubber-drawn cloth, and there is a danger of damage if struck by flowing water, wood, gravel, rolling stones, etc., so it must always be protected by a steel plate door.

By the way, the problem that the retention zone and the air bag are always protected by the steel plate door body is difficult because the air bag is a component that is required to have a function of supporting a hydraulic load acting on the steel plate door body. May be.
In other words, the air bag that supports the hydraulic load acting on the steel door is larger in size and requires less air pressure and is less expensive, and the risk of leakage of the fixing portion by the anchor bolt is low. Is increased, the length of the retaining band connecting the foundation concrete surface and the downstream surface of the steel plate door body on the downstream side becomes larger, and the tip of the retaining band bent at the time of lodging is The trouble which goes out from the tip occurs.
Therefore, in the design of the cross section of the pneumatic undulation gate, the size of the air bag is limited to an appropriate size, and the air bag and the retaining band are stored and protected under the steel plate door body when standing or lying down. However, at the time of lying down, the bending radius may be too small at the bent portion of the retaining band stored between the vicinity of the front end of the steel plate door body and the foundation concrete, which may cause a flaw.
For this reason, the steel sheet is bent at a sufficiently large angle of about 60 ° in the vicinity of the front end of the steel plate door body, and the space between the surface of the basic concrete and the downstream side surface of the steel plate door body is increased when lying down. However, it was pointed out that in a steel plate door with a large bending angle, the overflowing water vein becomes unstable and there is a risk of inducing vibration, and it was rejected.

Therefore, in the pneumatic undulation gate of the present invention, a round bar steel whose diameter is larger than the steel plate thickness is placed at the tip of the steel plate door body at a position where the upper surface of the steel plate door body and the tangent line of the round bar steel coincide. We decided to install it by welding.

Further, in the pneumatic undulation gate of the present invention, by arranging the pneumatic undulation gates having a small gate width (about 2 m to 5 m) in the direction of the rotation center of the steel plate door body, Decided to do.

As a result, the tip of the steel door is positioned above the foundation concrete surface by the difference between the diameter of the round bar and the thickness of the steel plate when lying down. The position where the overflowing water vein separates from the steel plate door body is stabilized at the tip of the steel plate door body, and the risk of vibration during overflow is also reduced. .

Further, according to the pneumatic undulation gate of the present invention, by attaching a round bar steel of an appropriate thickness to the tip of the steel plate door body by welding the upstream surface of the steel plate door body and the round bar steel surface by welding, We succeeded in expanding the storage space for the air bag and the retaining band by the surface of the foundation concrete and the downstream surface of the steel door, so keep the folding radius at the leading end of the retaining band large when lying down. It became possible to prevent damage.

In addition, by attaching a round steel bar of appropriate thickness to the tip of the steel plate door body, it is a drainer that prevents some of the water that overflows the door body from flowing along the back of the door body when standing up. The effect was obtained, and remarkable results were obtained in improving the landscape behind the door.
Furthermore, by making the material of this round steel bar stainless steel, when the door body falls down, the coating film is destroyed and the rusting can be avoided when the door body tip comes into contact with the support base.

In addition, the mounting of the round bar steel has a remarkable effect on the improvement of the rigidity against the bending of the steel plate door body in the lateral direction as well as a slight bending process on the steel plate door body.

Embodiments of a pneumatic undulation gate according to the present invention will be described below in detail with reference to the drawings.
1, FIG. 2, FIG. 3, FIG. 4 and FIG. 5 show one embodiment of the pneumatic relief gate of the present invention. FIG. 1 is a rear view of the pneumatic relief gate, and FIG. 2 is a pneumatic relief gate. FIG. 3 is a sectional view of a pneumatic undulation gate and shows a lying state, FIG. 4 is an explanatory view of a door body, and FIG. 5 is an explanatory view of an air bag.

1, 2, and 3, vertical anchor bolts 2 installed in a row across the water channel on the concrete upper surface 1 at the bottom of the water channel having a rectangular cross section are closed by the main presser plate 3, and three sides are closed 1 When the open side of the air bag 4 is sealed by pressing the edge 5 of the open side of the air bag 4 made of rubberized cloth made of a flat rectangle with open sides against the top surface 1 of the concrete at the bottom of the channel. At the same time, the air bladder 4 is fixed to the top surface 1 of the concrete at the bottom of the water channel.

Next, one side of the anchoring plate 6 made of rubberized cloth having sufficient strength on the upper surface of the main presser plate 3 is firmly fixed by the bolt 7 and the presser plate 8, and the other side is the lower portion of the door body 9 made of steel plate. By firmly fixing the bolt body 10 and the presser plate 11 to the upstream surface of the steel plate, the door body 9 made of a steel plate is anchored to the main presser plate 3 in a undulating manner and at the same time, water leakage between the two is prevented.
As a result, the round bar steel 22 which is the center of rotation during the undulation movement of the lower end portion of the steel plate door body 9 is located at a position along the downstream edge of the main presser plate 3, and at the same time the air bag 4 is a steel plate door body. The door body 9 made of a steel plate is supported in a pillow shape at a base portion on the downstream side of the steel plate 9.
In addition, it is made of rubberized cloth having sufficient strength with one end fixed to the top surface 12 of the concrete with anchor bolts 13 and presser plates 14 installed on the concrete top surface 12 at an appropriate position downstream of the air bag 4 at the bottom of the water channel. The other end of the belt 15 is fixed to the appropriate position above the position where the air bag 4 on the downstream surface of the door body 9 is in contact with the bolt 16 and the holding plate 17, so that the door body 9 is brought to a predetermined position. When standing, the door body 9 is stopped by the tension acting on the band 15.

Then a small angle of the bent portion 18 located above the door 9, and weld attachment to the upper surface and to match the tangential line at the time of falling down door 9 at the tip, the diameter than the thickness of the door 9 The large round steel bar 19 guides the water overflowing the door body 9 to the downstream side when standing up, thereby protecting the overflowing water and the driftwood flowing down together from hitting the air bag 4 and the belt 15. .
At the time of lodging, the round bar steel 19 at the tip of the door body 9 is supported by the support base 20, and the air bag 4 is formed by the upper surface 1 of concrete, the upper surface 12 of concrete, the door body 9, its bent portion 18 and the round bar steel 19. And a space for storing the belt 15 is secured.
In particular, the bent portion 21 of the band 15 can maintain a bend radius with a sufficient margin, so there is no fear of causing a flaw.
Further, since the bending angle of the bending portion 18 of the door body 9 is small, the water vein overflowing at this portion is not disturbed and causes vibration.

As shown in FIG. 4, the steel plate door body 9 has a width direction dimension slightly smaller than the weir width and a length necessary for securing a standing height required for standing up. Made in the head of the door body 9 bent portion 18 of the small bending angle is formed, a large round steel bar 19 having a diameter than the thickness of the door 9 is in its front end, when lodging the tangent of the door 9 And welded so as to coincide with the upper surface .
Furthermore, when the door body 9 undulates by welding a round bar steel 22 having a diameter substantially equal to the thickness of the main presser plate 3 to the lower end of the door body 9, the lower end of the door body 9 forms the upper surface 23 of the air bag 4. Make it slippery. Further, in a portion along the round bar steel 22 of the steel plate door body 9, female screws 24 for screwing the bolts 10 for fixing the tether 6 are arranged in a line, and above the bolts 16 for fixing the belt 15. There are combined bolt holes 25.

As shown in FIG. 5, when air is discharged, the width of the air bag 4 manufactured to be a flat rectangle is slightly smaller than the gate width, and the dimension in the direction perpendicular thereto is the door when inflated. It has sufficient dimensions to push up the body 9.
The rubberized cloth is continuously bent and closed on three sides other than the side that is produced by opening, which should be pressed by the main presser plate 3. Further, the length of the open side is slightly smaller than the weir width of the undulating gate, and two holes 26 through which the anchor bolts 2 pass in parallel to the edge 5 of the side that has been opened. It penetrates the rubberized cloth. A base 27 for connecting to the air pipe is attached near the center of the portion of the air bag 4 that contacts the upper surface 1 of the foundation concrete.

With this configuration, the air pipe 28 connected to the base 27 at the lower part of the air bag 4 is led to the land by burying it in the concrete of the water channel, etc. As shown in FIG. 1, FIG. 2 and FIG. 3, it is connected to the valve 30, the exhaust discharge part 31, the air supply on-off valve 32, the air supply flow rate adjustment valve 33, and the air compressor.

Then, as a result of press-fitting air into the air bag 4 from the base 27 via the air compressor 34 via the air supply flow rate adjustment valve 33, the air supply opening / closing valve 32, and the air pipe 28, the door body 9 stands up. FIG. 2 is a cross-sectional view of the bent state, and a small angle bending portion 18 located at the top of the door body 9 and its tip are welded and attached so that the tangent line coincides with the upper surface of the door body 9 when lying down. The round bar steel 19 functions so as to prevent the air bag 4 and the belt 15 from being directly struck by guiding the water overflowed downstream.
FIG. 1 shows the pneumatic undulation gate in this state as viewed from the downstream side, and the air bag 4 is located at the base portion on the downstream side of the door body 9 and supports the door body 9 over almost the entire weir width.

On the other hand, the air compressor 34 is stopped, the air supply open / close valve 32 is closed, the exhaust open / close valve 29 is opened, and the air having the pressure inside the air bag 4 is controlled by the exhaust flow control valve 30. , A sectional view showing a state in which the door body 9 is completely laid down as a result of being released into the atmosphere through the route of the base 27, the air pipe 28, the exhaust opening / closing valve 29, the exhaust flow control valve 30, and the exhaust discharge part 31. 3.
At this time, the round bar steel 19 at the front end of the door body 9 is at the upper part of the support base 20, and the distance between the bending portion 18 at a small angle located at the upper part of the door body 9 and the support base 20 and the upper surface 12 of the concrete. Therefore, the bent portion 21 of the band 15 bent by the fall of the door body 9 can maintain a sufficiently large bending radius.

Further, there is sufficient space for storing the air bag 4 and the belt 15 formed by the concrete upper surface 1, the concrete upper surface 12, the support base 20, the round bar steel 19, the bent portion 18, and the downstream surface of the door body 9. Since the air bag 4 and the belt 15 are secured as a whole, they are safely protected by the pocket of the door body 9 as a whole.
In addition, for the water flow that flows down over the fallen door body 9, the door body 9 is not bent at a large angle, so there is no vortex, and the streamline is separated from the door body 9. Further, since it stabilizes at the position of the round steel bar 19 at the tip, vibration does not occur.

The present invention can be suitably used, for example, as a pneumatic undulation gate that dams or discharges flowing water in rivers or irrigation canals.

It is a rear view of the state which showed one Example of the pneumatic undulation gate of this invention, and the pneumatic undulation gate stood up. It is sectional drawing of the state which the pneumatic type relief gate stood up. It is sectional drawing of the state which the pneumatic type relief gate fell down. It is explanatory drawing of the door body of a pneumatic undulation gate. It is explanatory drawing of the air bag of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Concrete top surface 2 Anchor bolt 3 Main presser plate 4 Air bag 5 Open edge 6 Anchoring plate 7 Bolt 8 Press plate 9 Door body 10 Bolt 11 Press plate 12 Concrete upper surface 13 Anchor bolt 14 Press plate 15 Band 16 Bolt 17 Presser plate 18 Bending part 19 Round bar 20 Support base 21 Bending part 22 Round bar 23 Upper surface 24 Female thread 25 Bolt hole 26 Hole 27 Base 28 Air pipe 29 Exhaust on-off valve 30 Exhaust flow control valve 31 Exhaust discharge part 32 Air supply on / off valve 33 Air supply flow control valve 34 Air compressor

Claims (3)

Anchor bolts and presser plates placed side by side across the bottom of a rectangular channel with a rectangular cross section, and the open side of an air bag made of rubberized cloth made into a flat rectangle with three sides closed and one side opened. The air bag is fixed to the bottom of the water channel while sealing the open side by pressing against the bottom, and the undulation of the lower end of the steel plate door body is positioned along the edge on the downstream side of the press plate on the air bag. By placing the center of rotation at the time of movement, the air bag is located at the root part on the downstream side of the steel plate door body, and supports the steel plate door body in a pillow shape,
If compressed air is sent in by connecting an air pipe to the air bag from an air operating device on land, the air bag expands and the steel plate door is raised, and conversely, air with pressure is discharged from the air bag. For example, in a pneumatic hoisting gate in which the air bag shrinks flat and the steel plate door body falls,
Pneumatic undulation, characterized in that a round bar steel with a diameter larger than the thickness of the steel plate is welded to the tip of the steel plate door at the position where the upper surface of the steel plate door body and the tangent of the round bar steel coincide. Gate. 2. The pneumatic undulation gate according to claim 1, wherein a bolt and a presser plate to be screwed into a female screw arranged side by side on an anchor hardware installed across the bottom of the water channel instead of the anchor bolt installed side by side across the bottom of the water channel are provided. The air bag was fixed to the anchor hardware while the open side was sealed by pressing the open side of the air bag made of rubberized cloth made into a flat rectangle with three sides closed and one side open to the anchor metal. Pneumatic undulation gate characterized by that. 3. A pneumatic undulation gate according to claim 1 or 2, wherein a pneumatic undulation gate having a small gate width (about 2m to 5m) is arranged side by side in the direction of the center of rotation of the steel plate door body. Pneumatic undulation gate characterized by that.

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