JP2007270475A - Pneumatic luffing gate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To apply also to rivers and irrigation channels with gentle slope by reducing a head between the upstream side and the downstream side of a water channel floor which is structurally required for storing a door body, an air bag, a mooring plate, and an anchoring strip in a pneumatic luffing gate for derricably mooring the door body to the water channel floor by a rubber-coated fabric band-like mooring plate and erecting or falling the door body by expanding or contracting the pillow-like air bag installed at the downstream side root part of the door body. <P>SOLUTION: A flow guide plate is installed just above the mounting part of the mooring plate at the lower end of the upstream surface of the door plate in the area from the projecting end of a lateral rib formed parallel with the lower end of the door body to the appropriate position of the upstream surface of a water cutting plate. The upstream surface of the water cutting plate is so bent at a position for mounting the flow guide plate that the upstream surface of the water cutting plate higher than the bent portion almost matches the extension of the upstream surface of the flow guide plate. When the door body is fallen, and the upstream surface is formed in a drain gradient gentle in the downstream direction, a storage space for the air bag and the hooking strip can be easily secured between the downstream surface of the water cutting plate bent in a chevron shape and a concrete floor surface. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

This invention is a kind of undulation gate used for the purpose of hoisting or discharging the flowing water of the water channel by allowing the door body to stand up or fall freely by the rotation center provided at the bottom of the water channel, If compressed air is fed into the pillow-shaped air bag located at the base of the downstream side of the door body by connecting an air pipe from an on-air air operating device, the air bag expands and the door body is raised and reversed. The present invention relates to a type of pneumatic undulation gate in which the air bag contracts flatly when the air having pressure is discharged from the air bag so that the door body falls.
That is, the present invention fixes an upstream edge of a tether plate made of rubberized cloth to the bottom of a water channel by an anchor bolt and a presser plate among pneumatic undulation gates that have been proposed and put into practical use. The downstream edge is fixed to the lower end of the upstream surface of the door body with a bolt and a holding plate, and the door body is tethered to the bottom of the water channel so that it can be raised and lowered. This is related to a pneumatic hoisting gate of the type in which the air bag is installed, the door body is erected by the expansion of the air bag, and the air bag is flattened and the door body is laid down.

In pneumatic undulation gates, air bags that support the door body in a pillow shape located at the downstream base of the door body are dispersed throughout the width of the door body to support hydraulic loads, so the door body is concentrated. There is no load. Therefore, a longitudinal bending moment acts on the door body by applying a support pressure of the pillow-shaped air bag that opposes the water pressure on the upstream surface and a tensile force by the anchoring plate at the lower end.

For this reason, in the case of a small door body, the function is secured by a steel plate having an appropriate size. In the case of large size, use a steel plate with a vertical rib with a simple structure in which bending rigidity is reinforced by a vertical rib welded in the direction of water flow when lying down in a posture perpendicular to the upstream surface of the steel plate. Can do.

In this way, the pneumatic undulation gate has a door shaft and a door stopper, compared to a steel undulation gate, where the bearing of the water channel bottom and the bearing of the door body are coupled by a rotating shaft to make the door body undulating. Since the degree of processing is low and the installation work is easy and it is economically superior, its use has increased in recent years.

Furthermore, since the riverbed head difference between the upstream and downstream of the undulation gate, which is structurally required for the pneumatic undulation gate, is smaller than that of the hydraulic steel undulation gate, when actually planning installation in a river or irrigation channel Large scale change of upstream and downstream revetments is unnecessary and demonstrates excellent economic efficiency.
Nothing in particular.

However, the riverbed heads upstream and downstream of this type of pneumatic undulation gate require a larger riverbed head than the rubberized cloth weirs, and should be installed in rivers and irrigation channels with gentle slopes. It was an obstacle at times.
The main cause of this problem is that the vicinity of the end of the vertical rib at the lower end of the door body is required to be a steel plate with high strength, as well as a tether plate made of rubberized cloth that anchors the door body, its presser plate, and presser bolt Is attached to the lower end of the upstream surface of the door body, so when the door body falls down, the extra thickness of the steel plate at the lower end of the door body and the thickness of the tethers, etc. are added as necessary structural bed drops The value reaches 100 mm to 300 mm.

Regarding this problem, it was first attempted to solve the problem by attaching a tether plate made of rubberized cloth to the lower end of the downstream surface of the door body, but the gap between the lower end portion of the door body and the tether plate when the door body collapsed. Since earth and sand and flutes enter the door, it not only becomes an obstacle to the raising and lowering operation of the door body, but also has a new problem that the tether is damaged, and it has not been materialized.

Therefore, in the pneumatic undulation gate of the present invention, in order to solve this problem, the upstream surface of the water stop plate parallel to the lower end of the door body is folded at an appropriate position in the middle of the height of the water stop plate of the door body. A curved line is provided, and below the folding line, the water stop above the folding line of the door body is attached by attaching a steel plate having an upstream surface that is the same plane as the upstream surface of the water blocking plate above the folding line. If the upstream surface of the plate and the flow guide plate is almost a single steel plate, and the door body falls, if this upstream surface has a gentle drainage gradient in the downstream direction, Utilizing the fact that the downstream side of the lower water stop plate becomes higher toward the downstream side (closer to the folding line), the excess thickness of the steel plate at the lower end and the thickness of the tether and its presser plate can be It was used as a storage space.

That is, the width corresponding to the total thickness of the thickness of the anchoring plate and the thickness of the presser plate on the upstream surface of the water stop plate immediately above the anchoring plate made of rubberized cloth attached to the lower end of the upstream surface of the door body. The long and narrow steel plate is welded to the door body in the direction perpendicular to the upstream surface of the water stop plate in the direction parallel to the lower end of the door body to form a horizontal rib, and then next to the upstream surface of the water stop plate. At the same time, a steel plate having a plane connecting the folding line parallel to the lower end of the door body defined at an appropriate position above the rib and the protruding end of the horizontal rib as an upstream surface is welded to the horizontal rib and the water stop plate as a current guide plate, When the upstream surface of the flow guide plate is extended upward from the folding line, the upstream surface of the water stop plate above the folding line is made to coincide.

In this way, since the upstream surface of the flow guide plate and the upstream surface of the water stop plate above the folding line are in the state of a single steel plate, the door body falls down and this upstream surface is in the downstream direction. When the posture has a gentle drainage gradient, the downstream surface of the water stop plate below the folding line moves from upstream to downstream (in the direction of the folding line from the lower end of the door body) due to the effect of the bending angle on the folding line. The height increases (as you go), so you can easily secure the space needed to store air bags and cable ties with the concrete floor.

If it does in this way, the water which flows down the upstream surface of the fallen door body will not be disturbed by the paragraph downstream from a tether plate fixing position, but it has the effect of making it flow gently and making water sound small.
In addition, the riverbed of the gate part is necessary for the strength required to increase the thickness of the steel plate near the lower end of the water stop plate and the structure required to attach the tether plate and its holding plate to the upstream surface of the lower end of the water stop plate. It has the effect of reducing the characteristics of large heads, and the effect of reducing construction costs for substructures when installed in rivers and irrigation channels with gentle slopes.

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

1, 2, and 3, anchor bolts 2 arranged across the water channel on the concrete upper surface 1 at the bottom of the water channel having a rectangular cross section are closed on the three sides by the main presser plate 3, and one side is opened. The upper edge 1 of the concrete at the bottom of the waterway together with the edges 5 and 6 of the open side of the air bag 4 made of rubberized cloth made into a flat rectangle and the upstream edge 8 of the anchoring plate 7 made of rubberized cloth together. The air bag 4 and the anchoring plate 7 are fixed to the bottom of the water channel at the same time as the open side of the air bag 4 is sealed by pressing against the water.

At the end portion of the edge 5 of the rubberized cloth below the open side of the air bag 4, there is a folded back fixing portion 10 at the end which is protected by a resin rod 9 so that the bending radius of the reinforcing fiber is not excessively small. Yes, it is hung on the corner 11 on the downstream side of the groove-like portion on the upstream side of the upper surface 1 of the concrete at the bottom of the water channel so that the edge 5 is not pulled out from the predetermined position.

Further, at the end of the upstream edge 8 of the anchoring plate 7, there is an edge-folded fixing portion 13 protected by a resin rod 12 so that the bending radius of the reinforcing fiber is not excessively small, and upstream of the main presser plate 3. It hangs on the corner 14 of the edge so that it is not pulled out from a predetermined position by the tension acting on the anchoring plate 7.
At the same time, at the edge of the edge 6 of the rubberized cloth above the open side of the air bag 4, there is an edge fixing portion 16 which is protected by a resin rod 15 so that the bending radius of the reinforcing fiber is not too small. Then, it is hung on the upstream end 17 of the folded fixing portion 13 at the end of the upstream edge 8 of the anchoring plate 7 and is not pulled out from a predetermined position by the tension applied by the edge 6.
That is, the upstream edge 8 of the anchoring plate 7 and the upper edge 6 of the air bladder 4 are not pulled out from a predetermined position by the main presser plate 3 and the anchor bolt 2.

The main presser plate 3 is strongly pressed against a total of three rubberized fabrics including the anchoring plate 7 and the two rubberized fabrics on the open side of the air bag 4 by the nuts 18 screwed into the anchor bolts 2 after being configured in this way. Then, the open side of the air bag 4 is sealed, and at the same time, the air bag 4 and the tether 7 are fixed to the concrete upper surface 1 at the bottom of the water channel.

Next, at the position where the edge 19 on the downstream side of the tether plate 7 follows the semicircular cross section 21 at the lower end of the steel plate 20 at the lower part of the steel plate door body, the holding plate 22 is placed on the upstream surface of the lower thick steel plate 20. And a bolt 23, and a steel plate door is tethered to the concrete upper surface 1 at the bottom of the water channel by a tether 7 so as to be raised and lowered.
Also in this case, at the edge of the downstream edge 19 of the anchoring plate 7, there is an edge fixing portion 25 which is protected by a resin rod 24 so that the bending radius of the reinforcing fiber is not too small. It is prevented from being pulled out from a predetermined position by the acting tension.

If comprised in this way, the semicircular cross-sectional part 21 of the lower end of the thick steel plate 20 of the lower part of the steel plate door body will be placed on the air bag 4 at a position along the downstream edge of the main presser plate 3. Therefore, if the air bag 4 expands, the downstream surface of the lower thick steel plate 20 is pushed to raise the entire door body. Conversely, if the air bag 4 contracts flatly, the door body will fall.
That is, the air bag 4 is installed in a pillow shape at the root portion on the downstream side of the steel door.

As shown in FIG. 2 and FIG. 3, in the upper part of the folding fixing part 25 on the downstream edge 19 of the rubberized cloth anchoring plate 7 attached to the lower end of the upstream surface of the thick steel plate 20 at the lower part of the door body, 7 in a posture perpendicular to the upstream surface of the thick steel plate 20 at the lower part of the door body, with a width substantially corresponding to the total thickness of the downstream edge 19 and the thickness of the presser plate 22 in the lower half of the door body. A horizontal rib 26 is formed by welding and mounting the door body in the direction parallel to the circular cross section 21 to the full width of the weir.
On the other hand, above the attachment portion of the lateral rib 26, the upstream surface of the thick steel plate 20 at the lower part of the door body is cut obliquely, and the thickness of the upper end is equal to the thickness of the upper water blocking plate 27 and welded.

The downstream surface of the water stop plate 27 is on the extension of the downstream surface of the lower thick steel plate 20 so that the contact surface with the air bag 4 is substantially flat, and at the same time the lower end After the water stop plate 27 is bent at a folding line 29 parallel to the semicircular cross section 21, the door body is extended to a height at which the standing height of the door body can be secured, and a cross beam 28 is attached to the upper end of the downstream surface.

In addition, an elongated steel plate having an appropriate width and thickness is placed on the upstream side of the lateral rib 26 on the upstream surface of the lower thick steel plate 20 and the upstream surface of the water stop plate 27 in a posture perpendicular to the upstream surface. It is sometimes welded and attached in the direction of water flow to reinforce the longitudinal bending rigidity of the water stop plate 27 as the vertical rib 31, and further from the protruding end of the lateral rib 26 toward the folding line 29 of the water stop plate 27. And welded to the lateral rib 26 and the water stop plate 27.
At this time, the upstream surface of the portion above the folding line 29 of the water stop plate 27 is substantially flush with the upstream surface of the flow guide plate 30.
Further, as shown in FIG. 3, when the door body is in a lying posture and the cross beam 28 is supported by the support table 41 when lying down, the upstream surface above the folding line 29 of the flow guide plate 30 and the water stop plate 27 is in the downstream direction. It had a gentle drainage gradient.

With this configuration, the air pipe 43 connected to the base 42 at the bottom of the air bag 4 is guided to the land by burying it in the concrete of the water channel, and the exhaust on-off valve 44 of the air operating device, the exhaust flow rate adjustment 1, 2, and 3 are connected to the valve 45, the exhaust discharge section 46, the air supply on / off valve 47, the air supply flow rate adjustment valve 48, and the air compressor 49.

Then, as a result of press-fitting air from the air compressor 49 into the air bag 4 via the air supply flow rate adjustment valve 48, the air supply on-off valve 47, the air pipe 43, and the base 42, the air bag 4 is FIG. 2 is a cross-sectional view of the state in which the door body is erected by inflating and pushing the downstream surface of the door body, and the air bag 4 guides the water overflowed by the cross beam 28 at the upper end of the door body to the downstream side. It protects against hitting or the retaining band 32.
FIG. 1 shows this state seen from the downstream side, and the air bag 4 is located in a pillow shape at the downstream base portion of the door body, and supports the door body in almost the entire width, while being attached at a symmetrical position. The belt 32 keeps the door body from standing up too much.

On the other hand, the air compressor 49 is stopped, the air supply on-off valve 47 is closed, the exhaust on-off valve 44 is opened, and the air having the pressure inside the air bag 4 is controlled by the exhaust flow adjustment valve 45. FIG. 3 is a cross-sectional view of a state where the door body has fallen down as a result of being released from the exhaust emission part 46 into the atmosphere.
At this time, the upstream surface of the flow guide plate 30 and the upstream surface of the water blocking plate 27 above the folding line 29 are substantially on the same plane.
When the horizontal girder 28 at the upper end of the door body is supported by the support table 41 when lying down, this flat surface has a gentle drainage gradient, so that it is safely excluded to the downstream side along with the water that flows down.

Moreover, since the downstream surface of the lower thick steel plate 20 and the water stop plate 27 is supported by the semicircular cross-sectional portion 21 at the lower end and the horizontal girder 28 at the upper end to secure a space between the concrete floor and the air bag 4 and the retaining band. 32 and its fixed parts can be accommodated without being crushed by the overturned door body.

FIG. 4 is an explanatory diagram of a door body.
The thick steel plate 20 at the lower part of the door body is also a part of the water stop plate, but the rubber radius is increased by increasing the bending radius when the tether 7 and the air bag 4 made of the rubber tension fabric in contact with each other are folded at the lower end. In order to prevent the internal secondary stress from becoming a dangerous value, the plate thickness is increased.
A female screw 50 into which a bolt 23 for fixing the upstream edge 19 of the anchoring plate 7 is screwed is arranged on a line parallel to the semicircular cross section 21 at the lower end of the lower thick steel plate 20 and close to the lower end. Above that, a lateral rib 26 is welded.

Above the lateral ribs 26, the lower thick steel plate 20 decreases in thickness upward and is welded to the water stop plate 27 at a welding line 53 parallel to the semicircular cross-section 21 at the lower end.
At this time, the downstream surface of the water stop plate 27 between the weld line 53 and the folding line 29 is flush with the downstream surface of the lower thick steel plate 20 so that the contact surface with the air bag 4 is not disturbed. To.

Further, the water stop plate 27 is bent at an appropriate angle in the fold line 29 on the upstream surface above the weld line 53, and then the upper end of the water stop plate 27 is extended to a length that can ensure the standing height required for the door body, A cross beam 28 is attached to the downstream surface.
Further, the vertical rib 31 is welded and attached at an appropriate interval on the upstream surface of the lower thick steel plate 20 above the lateral rib 26 and the upstream surface of the water stop plate 27 to reinforce the vertical bending strength of the door body. is doing.

Then, the flow guide plate 30 with the plane extending from the protruding end of the lateral rib 26 to the folding line 29 of the upstream surface of the water blocking plate 27 as the upstream surface is formed of the folding line 29 of the protruding end of the horizontal rib 26 and the water blocking plate 27. Welding nearby.
A bolt hole 52 of a bolt 37 for fixing the retaining band 32 is provided at a symmetrical position above the folding line 29 of the water stop plate 27.

5, 6 and 7 show another embodiment of the pneumatic undulation gate according to the present invention. FIG. 5 is a sectional view of the pneumatic undulation gate and shows a standing state, and FIG. 6 is a sectional view. The lying state is shown, and FIG. 7 is an explanatory view of the door body.

5 and 6, the anchor bolts 2 arranged across the water channel on the concrete upper surface 1 at the bottom of the water channel having a rectangular cross section are closed to three sides by the main presser plate 3 into a flat rectangle with one side opened. By pressing together three edges 5 and 6 of the open side of the air bag 4 made of rubberized cloth and the upstream edge 8 of the anchoring plate 7 made of rubberized cloth against the upper surface 1 of the concrete at the bottom of the channel, air is pressed. The air bag 4 and the tether plate 7 are fixed to the bottom of the water channel at the same time as the open side of the bag 4 is sealed.

At the edge of the edge 5 of the rubberized cloth below the open side of the air bag 4, there is an edge fixing portion 10 that is protected by a resin rod 9 so that the bending radius of the reinforcing fiber is not too small. It is hung on the corner 11 on the downstream side of the groove-like portion on the upstream side of the upper surface 1 of the concrete at the bottom of the water channel so that the edge 5 is not pulled out from the predetermined position by the acting tension.

Further, at the end of the upstream edge 8 of the anchoring plate 7, there is an edge-folded fixing portion 13 protected by a resin rod 12 so that the bending radius of the reinforcing fiber is not excessively small, and upstream of the main presser plate 3. It hangs on the corner 14 of the edge so that it is not pulled out from a predetermined position by the tension acting on the anchoring plate 7.
At the same time, at the end portion of the edge 6 of the rubberized cloth above the open side of the air bag 4, there is a folded back fixing portion 16 at the end which is protected by a resin rod 15 so that the bending radius of the reinforcing fiber is not too small. Yes, it is hung on the upstream end 17 of the folded fixing portion 13 at the end of the upstream edge 8 of the anchoring plate 7 and is not pulled out from a predetermined position by the tension applied by the edge 6.
That is, the upstream edge 8 of the anchoring plate 7 and the upper edge 6 of the air bladder 4 are not pulled out from a predetermined position by the main presser plate 3 and the anchor bolt 2.

The main presser plate 3 is strongly pressed against a total of three rubberized fabrics including the anchoring plate 7 and the two rubberized fabrics on the open side of the air bag 4 by the nuts 18 screwed into the anchor bolts 2 after being configured in this way. Then, the open side of the air bag 4 is sealed, and at the same time, the air bag 4 and the tether 7 are fixed to the concrete upper surface 1 at the bottom of the water channel.

Next, the edge 19 on the downstream side of the tether plate 7 is placed on the upstream surface of the bottom water stop plate 60 at a position along the semicircular cross section 61 at the lower end of the bottom water stop plate 60 made of a steel plate thick steel plate. The holding plate 22 and the bolt 23 are fixed, and the door made of steel plate is anchored to the upper surface 1 of the concrete at the bottom of the water channel so as to be raised and lowered by the anchoring plate 7.
Also in this case, at the edge of the downstream edge 19 of the anchoring plate 7, there is an edge fixing portion 25 which is protected by a resin rod 24 so that the bending radius of the reinforcing fiber is not too small. It is prevented from being pulled out from a predetermined position by the acting tension.

If comprised in this way, the semicircular cross-sectional part 61 of the lower end of the bottom water stop plate 60 made of a steel plate rests on the air bag 4 at a position along the downstream edge of the main presser plate 3. Therefore, if the air bag 4 expands, the downstream surface of the bottom water stop plate 60 is pushed to raise the door body. Conversely, if the air bag 4 contracts flatly, the door body will fall.
That is, the air bag 4 is installed in the shape of a pillow at the base portion on the downstream side of the door made of steel plate.

As shown in FIG. 5 and FIG. 6, the anchoring plate is located immediately above the turn-back fixing portion 25 at the downstream edge 19 of the anchoring plate 7 made of rubberized cloth attached to the lower end of the upstream surface of the bottom water stop plate 60 of the door body. 7 is a semicircular cross section of the lower end of the door body in a posture perpendicular to the upstream surface of the bottom water blocking plate 60, with a width substantially corresponding to the total thickness of the downstream edge 19 and the thickness of the holding plate 22. A horizontal rib 62 is formed by welding the door body to the full width of the weir in a direction parallel to the portion 61.
The upstream surface of the bottom water stop plate 60 above the folding line 63 on the upstream surface parallel to the semicircular cross section 61 at the lower end of the door body at an appropriate position on the upstream surface of the bottom water stop plate 60 above the lateral rib 62. Is cut at an appropriate angle, and the upper end of the lower water stop plate 60 has the same thickness as that of the upper water stop plate 64, and this position is defined as a weld line 65. And the upper water stop plate 64 are welded.

At this time, it is possible to secure the standing height of the door body so that the upstream surface of the upper water stop plate 64 is a flat surface extending from the machined upstream surface above the folding line 63 of the upstream surface of the lower water stop plate 60. After extending the upper water stop plate 64 to a certain height, a cross beam 66 is attached to the upper end of the downstream surface.

In addition, a steel plate whose upstream surface is a plane connecting the protruding end of the horizontal rib 62 and the folding line 63 provided on the upstream surface of the bottom water stop plate 60 is disposed on the upstream end of the horizontal rib 62 and the upstream surface of the bottom water stop plate 60. A flow guide plate 67 is formed by welding. At this time, the upstream surface of the flow guide plate 67 and the upstream surface of the upstream surface of the upper water blocking plate 64, which are the upper surface of the upstream surface of the upper water blocking plate 64, are the same plane. To be.
Further, as shown in FIG. 6, when the door body is in the lying posture and the cross beam 66 is supported by the support table 41 when lying down, the machining portion above the folding line 63 of the flow guide plate 67 and the bottom water stop plate 60 and The upstream surface of the upper water stop plate 64 has a gentle drainage gradient in the downstream direction.

As a result, the downstream surface of the bottom water stop plate 60 and the downstream surface of the top water stop plate 64 are bent at the same angle as the bending angle of the upstream surface of the bottom water stop plate 60 in the folding line 63 at the weld line 65. The downstream surface of the upper water stop plate 64 and the lower water stop plate 60 supported at the upper end by the cross beam 66 secures a space between the concrete floor surface, and the air bag 4 and the retaining band 32 and its components. Is stored in this secured space without being crushed by the fallen door.

FIG. 7 is an explanatory diagram of a door body.
The bottom water stop plate 60 of the door body increases the bending radius when the tether 7 made of rubberized cloth and the rubberized cloth of the air bag 4 are bent by the semicircular cross section 61 at the lower end to some extent, In order to prevent the secondary stress due to bending inside the rubberized cloth from becoming a dangerous value, the sheet thickness is increased to increase the semicircular radius of the semicircular cross section 61 and at the same time supported by the air bag 4. A thick steel plate is used to keep the bending stress due to the bending moment generated when standing up to a permissible value.
On the other hand, the upper water stop plate 64 is a steel plate having a relatively small thickness because the acting bending moment is small.
A female screw 68 for screwing a bolt 23 for fixing the upstream edge 19 of the anchoring plate 7 is arranged on a line parallel to the semicircular cross section 61 at the lower end of the bottom water blocking plate 60 and close to the lower end. A lateral rib 62 is welded to the upper side.

Further, a flow guide plate 67 is welded from a front end of the lateral rib 62 to a folding line 63 provided on the upstream surface above the bottom water stop plate 60, and a weld line 65 at the front end of the upstream surface that has been machined is welded. The upper water stop plate 64 is welded and joined.
At this time, the upstream surface of the flow guide plate 67, the upstream surface of the lower water stop plate 60 that has been machined, and the upstream surface of the upper water stop plate 64 are on the same plane. This can be achieved by appropriately selecting the position of the folding line 63 and the bending angle.
On both sides of the door body, female screws 69 for screwing bolts for attaching the side watertight rubber are arranged in a vertical row, and above the weld line, bolt holes 70 of bolts 37 for fixing the retaining band 32 to the door body. There is.

In the embodiment shown in FIGS. 5, 6 and 7, there is no vertical rib in the door body, and the bending which acts on the door body when the water pressure acting on the door body is supported by the air bag 4 and the tether 7. The moment is countered by the section modulus due to the thickness of the bottom water stop plate 60 and the top water stop plate 64, so the door body is relatively heavy, but the structure is simple, the number of processing steps is small, and the small relief gate If it is applied, it will be economically superior.

In the pneumatic undulation gate of the present invention, in a gently sloping river or irrigation channel where it is difficult to increase the head of the river bed upstream and downstream of the gate, the door body is used by maximizing the allowable river bed head. Since the air bag and the retaining band are accommodated and protected in the space at the downstream base portion, the application range of the pneumatic undulation gate can be greatly expanded.

1 is a rear view of a pneumatic undulation gate according to an embodiment of the present invention in a state where the pneumatic undulation gate is raised. It is sectional drawing of the state which the pneumatic relief gate stood up. It is sectional drawing of the state which the pneumatic type relief gate fell down. It is explanatory drawing of a door body. It is sectional drawing of the state which showed the other Example of the pneumatic undulation gate of this invention, and the undulation gate stood up. It is sectional drawing of the state which the pneumatic type relief gate fell down. It is explanatory drawing of a door body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Concrete top surface 2 Anchor bolt 3 Main presser plate 4 Air bag 5 Edge 6 Edge 7 Anchor plate 8 Edge 9 Rod 10 Folding fixing part 11 Corner 12 Rod 13 Folding fixing part 14 Corner 15 Rod 16 Folding fixing part 17 Upstream end 18 Nut 19 Edge 20 Lower thick steel plate 21 Semicircular cross section 22 Presser plate 23 Bolt 24 Rod 25 Folding fixing portion 26 Horizontal rib 27 Water stop plate 28 Horizontal girder 29 Folding curve 30 Current guide plate 31 Vertical rib 32 Tying band 33 Anchor bolt 34 Holding plate 35 Rod 36 Folding fixing portion 37 Bolt 38 Pressing plate 39 Rod 40 Folding fixing portion 41 Supporting base 42 at the time of falling 42 Base 43 Air pipe 44 Exhaust on-off valve 45 Exhaust flow control valve 46 Exhaust discharge portion 47 Supply on-off valve 48 Air supply flow adjustment valve 49 Air compressor 50 Female screw 51 Female screw 52 Female screw 52 Bolt hole 53 Weld line 60 Water stop plate 61 Semicircle Cross section 62 Horizontal rib 63 Folding curve 64 Water stop plate 65 Weld line 66 Cross girder 67 Flow guide plate 68 Female screw 69 Female screw 70 Bolt hole

Claims (3)

The upstream edge of the rubber-bound fabric strip-shaped anchoring plate is fixed to the concrete top surface of the water channel at the downstream side by anchor bolts and main presser plates installed side by side across the bottom of the water channel having a rectangular cross section. By fixing the edge of the door to the lower end of the upstream surface of the steel door body with bolts and a retainer plate, the door body can be tethered to the bottom of the water channel while preventing water leakage between the concrete and the lower part of the door body. And
In addition, if a compressed air is sent to the air bag by connecting an air pipe from a land air operating device to a pillow-shaped air bag installed at the base of the downstream side of the steel door body, the air bag In the pneumatic hoisting gate where the air bag is flattened and the door body is laid down if the air with pressure is discharged from the air bag, and the air bag shrinks flatly,
On the upstream surface of the water stop plate just above the edge of the downstream side of the anchoring plate made of rubberized cloth attached to the lower end of the upstream surface of the door body,
A long and narrow steel plate with a width corresponding to the total thickness of the tether plate and the presser plate is placed at a right angle to the upstream surface of the water stop plate and parallel to the lower end of the door to fill the weir width of the door. Welded and installed as a horizontal rib, the plane connecting the folding line parallel to the lower end of the door body on the upstream surface and the protruding end of the horizontal rib, set at an appropriate position above the horizontal rib on the upstream surface of the water stop plate At the same time, the steel plate to be welded and attached to the horizontal rib and the water stop plate as a flow guide plate, the extension plane of the upstream surface of the flow guide plate is not located downstream from the upstream surface of the water stop plate above the folding line. Select the bending angle of the upstream surface of the water stop plate in the bending curve,
As a result, when the door body falls down and the upstream surface of the flow guide plate and the upstream surface of the water blocking plate above the folding curve have a gentle drainage gradient in the downstream direction, the bending angle in the folding curve Due to the effect, the height of the downstream surface of the waterstop plate below the folding line increases as it goes from upstream to downstream, and is necessary for storing air bags and retaining zones between the floor of the concrete. Pneumatic undulation gate characterized in that a large space is easily secured. The pneumatic undulation gate according to claim 1, wherein the bolt is screwed into the female screw installed side by side on the 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 having a rectangular cross section. A pneumatic relief gate characterized in that the upstream edge of the tether made of rubberized cloth is fixed to the upper surface of the concrete at the bottom of the water channel by the main presser plate. 3. A pneumatic undulation gate according to claim 1 or 2, wherein a pneumatic undulation gate having a small gate width (about 6 m or less) is arranged side by side in the extending direction of the rotation center of the door body, thereby forming a undulation gate of a wide water channel. Pneumatic undulation gate characterized by that.

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