JP4542919B2 - Pneumatic undulation gate - Google Patents

Description

This invention is a kind of undulation gate used for the purpose of hoisting or discharging the flowing water of a water channel by raising or lowering the door body at the center of rotation provided at the bottom of the water channel. If compressed air is supplied by connecting an air pipe from a land air handling device to an air bag made of rubberized cloth with three sides closed and one side open, made into a flat rectangle located at the downstream base, The present invention relates to a pneumatic hoisting gate in which if the bag expands to raise the door body, and the air having pressure is discharged from the air bag, the air bag contracts flatly and the door body falls.

The air bag that drives the rising and falling of the door of the pneumatic lift gate is made into a flat rectangle with three sides closed and one side open, and the open side is pressed against the bottom of the channel with anchor bolts and main presser plate. As a result, the open side is sealed and fixed to the bottom of the water channel, so if compressed air is fed into the air bag, the air bag will inflate while pushing up the door body. If this is continued, the cross section of the air bag becomes nearly circular, and the door body falls over to the upstream side.

Therefore, in the pneumatic hoisting gate, the other end of the rubber-stretched cloth retaining strip with one end fixed above the position where the air bag contacts the downstream surface of the door body is used as the foundation concrete downstream of the air bag. When the door body is fixed and stands up to a predetermined posture, the door body is stopped by a tension acting on the door body.
As for the predetermined standing posture of the door body, the standing angle with respect to the horizontal is generally set to about 60 ·.
JP 2004-124448 A

By the way, it is usual that the number of installation of the reservation zone is one or two per door body. Therefore, when the door body is stopped in a predetermined standing posture, the tension acting on the retaining band becomes a large value.
Furthermore, in order to fix one retaining band to the door body, it is customary to use two bolts, so the tension acting on the bolt is also a large value, and the bolt mounting part of the door body corresponds to this. Strength is required.

In the pneumatic undulation gate, the weight and water pressure acting on the door body are supported by the air bags distributed over the entire weir width, so that the load is not concentrated and the structure of the door body becomes simple and economical. Although it has excellent characteristics, it was required to increase the thickness of the steel plate of the door body in order to cope with the concentration of the load acting on the attachment part of this retaining band, and it was an obstacle to the weight reduction of the door body .

Therefore, in the pneumatic undulation gate of the present invention, in order to reinforce the bending strength in the oblique direction of the door body, in the posture perpendicular to the upstream surface on the upstream surface of the door body, the direction parallel to the direction of water flow Therefore, the position of the bolts for fixing the vertical ribs and the retaining strips to the door body by the long steel plates to be welded with the width and the thickness appropriately determined at appropriate intervals was determined.
That is, when the vertical ribs are arranged in the dam width direction of the door body, the vertical ribs having the center of the plate thickness aligned with the center position of the bolt for fixing the retaining band to the door body are preferentially arranged, and the other vertical ribs remain. If it is arranged in this space, the effect of strengthening the bending strength in the oblique direction of the door body by the vertical rib is obtained, and at the same time, the tension acting on the bolt for fixing the retaining band to the door body is widened by the vertical rib. It becomes possible to diffuse.
At this time, at an appropriate position in the longitudinal direction of the longitudinal rib, a female screw is installed so that the center line of the screw is aligned with the center of the thickness of the longitudinal rib and a bolt for fixing the retaining band to the door body is screwed. If a construction method that firmly welds and fixes is adopted, workability is also good.

In this way, the tension transmitted from the retaining band to the female screw via the presser plate and the presser bolt is transmitted in the vertical direction of the door body due to the rigidity of the vertical ribs, and further spreads throughout the door body. Increase in stress is suppressed, and the door is thinned thoroughly, so that an inexpensive door can be obtained.
In addition, the female screw of the fixing bolt arranged at the middle position of the length of the vertical rib is on the upstream surface of the door body. When the door body falls down, it directly contacts the flowing water and gravel, but it is protected by the vertical rib. Will not be damaged.

Conventionally, many types of undulation gates have been developed and installed as gates for raising or discharging the flowing water by allowing the door body to stand up and lie down freely at the center of rotation provided in rivers and waterways.

In particular, pneumatic hoisting gates that stand by the expansion of an air bag installed at the base on the downstream side of a steel plate and fall down by shrinkage are economical because of the structure that supports the load distributed over the entire gate width. Opportunities to consider installation are increasing.
However, since the price of steel materials used for gates has risen since the year before last, and the product price has risen, it has been strongly required to reduce the weight of the door body in order to maintain its economic advantage.
In the pneumatic undulation gate according to the present invention, it is possible to directly transmit the tension of the presser bolt that transmits a large value of tension acting on the retaining band to the door body, so that the plate thickness of the door body is limited. The door can be made lighter.

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, 4, and 5 show an embodiment of the pneumatic undulation gate. FIG. 1 is a front view of the pneumatic undulation gate, FIG. 2 is a rear view, and FIG. FIG. 4 is a sectional view showing a lying state, and FIG. 5 is an explanatory view of a door body.

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

At the end of the edge 5 of the rubberized cloth 9 below the open side of the air bag 4, the edge-folding fixing portion 11 is protected by a resin rod 10 so that the bending radius of the reinforcing fiber is not excessively small. It is hung on the corner 12 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 it is not pulled out from a predetermined position by the tension applied by the rubberized cloth 9.

Further, at the end of the upstream edge 8 of the anchoring plate 7, there is an edge-end folding fixing portion 14 protected by a resin rod 13 so that the bending radius of the reinforcing fiber is not excessively small, and upstream of the main presser plate 3. Since it is ensured that it does not move upward or laterally by the concave portion 15 at the lower corner of the side, it is prevented from being pulled out from a predetermined position by the tension acting on the anchoring plate 7.

At the same time, at the end of the edge 6 of the rubberized cloth 16 above the open side of the air bag 4, the edge folding and fixing portion protected by the resin rod 17 so that the bending radius of the reinforcing fiber is not too small. 18 is placed on the upstream side 19 of the folded fixing portion 14 at the end of the upstream edge 8 of the anchoring plate 7 so that it is not pulled out from a predetermined position by the tension applied by the rubberized cloth 16.
That is, the rubber pulling cloth 16 above the anchoring plate 7 and the air bag 4 is not pulled out from a predetermined position by the main presser plate 3 and the anchor bolt 2.

With this configuration, the main presser plate 3 is attached to the anchor plate 7 by the nut 20 screwed into the anchor bolt 2, and the three rubberized fabrics 9 and 16 on the open side of the air bag 4 are attached to the bottom of the water channel. By strongly pressing against the upper surface 1 of the concrete, the air bag 4 and the tether 7 are fixed to the bottom of the water channel while sealing the open side of the air bag 4.

Next, the edge 21 on the downstream side of the tether plate 7 is fixed to a position along the lower end 23 of the upstream surface of the steel plate door body 22 by a holding plate 24 and a bolt 25, and the steel plate door body 22 is fixed by the tether plate 7. Tethered to the upper surface 1 of the concrete at the bottom of the waterway.
Also in this case, at the edge of the downstream edge 21 of the anchoring plate 7, there is a bent-back fixing portion 27 of the edge protected by the resin rod 26 so that the bending radius of the reinforcing fiber is not too small. So that it cannot be pulled out from a predetermined position due to the tension applied by.

If comprised in this way, since the lower end 23 of the door 22 made from a steel plate will be in the state mounted on the air bag 4 in the position which follows the downstream edge of the main presser plate 3, if the air bag 4 expand | swells, it will be. If the steel plate door body 22 stands up and the air bag 4 contracts flatly, the steel plate door body 22 will fall.

Furthermore, the anchor belt 29 and the holding plate 30 installed on the concrete upper surface 28 at an appropriate position downstream of the air bladder 4 at the bottom of the water channel and the retaining band 31 having one end fixed to the concrete upper surface 28 have sufficient strength. The other end of the door 22 made of steel plate is fixed to an appropriate position above the contact of the air bag 4 on the downstream side of the door 22 made of steel plate with a bolt 32 and a presser plate 33 so that the door 22 made of steel plate When standing up to the posture, it is stopped by the tension acting on the retaining band 31.

The retaining band 31 also has a reinforcing fiber folding fixing portion 35 protected at its end by a resin rod 34 so that the bending radius of the reinforcing fiber is not excessively small, and the tension at which the retaining band 31 acts. To prevent it from being pulled out from a predetermined position.
Instead of anchor bolts installed side by side across the bottom of the water channel, the bolts to be screwed into the female screws provided side by side on the anchor hardware installed across the bottom of the water channel and the main presser plate are closed on three sides and one side is closed. Seal the open side by pressing the open side of the rubber-filled air bag made into an open flat rectangle against the bottom of the water channel through the upstream edge of the rubber-bound fabric door anchoring plate However, an air bag and a door anchoring plate may be fixed to the bottom of the water channel.
In addition, when the door body stands up to a predetermined posture, instead of a rubber-stretch cloth retaining band that stops the door body by the tension acting on the door body, a wire rope with fixing sockets at both ends or fixing pins at both ends It is also possible to use a steel flat bar having a hole and a pin coupling part for bending in the middle.
Furthermore, instead of a rubber-cloth-clothed door anchoring plate that attaches the door body to the bottom of the waterway, the bearing that protrudes from the downstream edge of the main presser plate and the bearing at the lower end of the door body can be raised and lowered on the rotating shaft. May be combined.

Next, the bent portion 36 of the head portion of the steel plate door body 22 guides the water that overflows to the downstream side when standing up, so that the water, the driftwood that flows down together with the air bag 4, the retaining band 31, and the like. Protect against hitting.
Further, at the time of lodging, the bent portion 36 of the head portion of the steel plate door body 22 is supported by the support base 37, and is required by the concrete upper surface 1, the concrete upper surface 28, and the downstream surface of the steel plate door body 22. Since the space is ensured, the air bladder 4 and the retaining band 31 are not crushed by the steel plate door body 22.

As shown in FIG. 5, the steel plate door body 22 has a width direction dimension slightly smaller than the weir width and a length necessary to ensure a standing height required for standing, Is provided with a bending portion 36.
Further, on the upstream surface of the door body 22, in order to enhance the bending strength in the oblique direction of the door body, an elongated steel plate having an appropriate width and thickness in a direction perpendicular to the upstream surface and parallel to the flow of water. Are attached by welding at an appropriate interval to form a vertical rib 39, and the lower end thereof is reinforced by providing a horizontal rib 40 in order to stop the attachment plate 7 above the attachment position.
Further, between the lateral rib 40 and the lower end 23, female threads 38 into which bolts 25 for fixing the downstream edge 21 of the tether 7 are screwed are arranged in a line.

In this embodiment, the bending strength in the oblique direction of the door body 22 is reinforced by nine vertical ribs 39, but four of the vertical ribs 39 fix the retaining band 31 to the door body 22. A female screw 41 for screwing the bolt 32 is attached with its center line aligned with the center of the plate thickness of the vertical rib 39, and has a function of dispersing the tension acting on the bolt 32.
Since the four vertical ribs 39 are in pairs, the center distance between the two is the center distance required by the bolt 32. Therefore, the interval between the two vertical ribs 39 is different from the interval at which the other vertical ribs 39 are arranged on the door body 22.

After the construction as described above, the air pipe 43 connected to the base 42 provided at an appropriate position of the rubberized cloth 9 below the air bag 4 is led to the land by burying it in the concrete of the water channel, etc. The exhaust on-off valve 44, the exhaust flow control valve 45, the exhaust discharge section 46, the air supply on-off valve 47, the air supply flow control valve 48, and the air compressor 49 are shown in FIGS. Connect like this.

Then, air is pressed into the air bag 4 from the air compressor 49 via the air supply flow rate adjustment valve 48, the air supply opening / closing valve 47, the air pipe 43, and the base 42, and as a result, the door body 22 rises. FIG. 3 is a sectional view of the door body 22, and the bent portion 36 of the head of the door body 22 functions so as to guide the overflowing water downstream and not hit the air bag 4 or the band 31.
FIG. 1 shows this state viewed from the upstream side, and nine vertical ribs 39 are attached to the upstream surface of the door body 22, and female screws 41 are attached to four of them.
FIG. 2 shows this state viewed from the downstream side, and the door body 22 is supported at almost the full width on the back side of the door body 22.

On the other hand, the air compressor 49 is stopped, the air supply on / off valve 46 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 control valve 45. FIG. 4 is a cross-sectional view of the door body 22 completely lying down as a result of discharge from the exhaust discharge section 46 into the atmosphere.

The pneumatic undulation gate of the present invention is an air used for the purpose of weiring or discharging the flowing water of a river or waterway by allowing the door body to stand up or fall freely by a rotation center provided at the bottom of the river or waterway. It can be used as a pressure relief gate.

FIG. 3 is a front view of the pneumatic undulation gate according to an embodiment of the present invention in a state where the undulation gate is raised (upstream side of the viewpoint). It is a rear view (point of view downstream) in the state where a 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.

DESCRIPTION OF SYMBOLS 1 Top surface of concrete 2 Anchor bolt 3 Main presser plate 4 Air bag 5 Edge 6 Edge 7 Anchoring plate 8 Upstream edge 9 Rubber pulling cloth 10 Rod 11 Folding fixing part 12 Corner 13 Rod 14 Folding fixing part 15 Recessed part 16 Rubber drawing cloth 17 Rod 18 Folding fixing portion 19 Upstream side 20 Nut 21 Downstream edge 22 Steel plate door body 23 Lower end 24 Presser plate 25 Bolt 26 Rod 27 Folding fixing portion 28 Concrete upper surface 29 Anchor bolt 30 Holding plate 31 Retention band 32 Bolt 33 Presser Plate 34 Rod 35 Folding fixing portion 36 Bending portion 37 Support base 38 Female screw 39 Vertical rib 40 Horizontal rib 41 Female screw 42 Base 43 Air pipe 44 Exhaust on-off valve 45 Exhaust flow control valve 46 Exhaust discharge part 47 Supply on-off valve 48 Air supply flow control valve 49 Air compressor

Claims (1)

Anchor bolts and main presser plates installed side by side across the bottom of a channel with a rectangular cross section are open sides of an air bag made of rubberized fabric made into a flat rectangle with three sides closed and one side open, Fix the air bag and the door anchoring plate to the bottom of the waterway, sealing the open side by pressing it against the bottom of the waterway through the upstream edge of the rubber anchored door body anchoring plate, At the same time that the steel plate door body can be attached to the bottom of the waterway at the bottom edge of the water channel by attaching the lower end of the upstream surface of the steel plate door body to the downstream edge of the door anchoring plate with a bolt and a holding plate. It is located at the base of the downstream side of the steel plate door and is supported in a pillow shape.
In this way, if an air tube is connected from the air operating device on land to the air bag, and compressed air is sent from the air operating device to the inside of the air bag, the air bag expands and the door body stands upright. In the pneumatic hoisting gate, the air bag shrinks flatly and the door body falls down if air with pressure is discharged from the air bag.
Connect the other end of the rubber-stretched cloth retaining band, which has one end fixed with anchor bolts and presser plates installed in concrete at an appropriate position downstream from the air bag at the bottom of the waterway, to the downstream side of the door body. When the door body stands up to a predetermined position by fixing it with a pair of left and right bolts and a presser plate at an appropriate position above the air bag, the door body is stopped by the tension acting on the retaining band. At the same time, an elongated steel plate of appropriate width and thickness is welded to the upstream surface of the door body in a posture perpendicular to the upstream surface of the door body at appropriate intervals in a direction parallel to the water flow. As a vertical rib, the bending rigidity in the oblique direction of the door body is strengthened, and in addition, the center of the plate thickness is made to coincide with the center line of each of the pair of left and right bolts that fix the retaining band to the door body. Fixing the retaining band to the door body by always arranging the ribs That the tension acting on the bolt, pneumatic relief gates by a rigid longitudinal ribs, characterized in that so as to spread to a wide range of door body.

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