JP7209351B2 - gate device - Google Patents

Description

The present invention relates to a gate device for opening and closing a waterway.

2. Description of the Related Art A gate device that opens and closes a communication port between an inner water side and an outer water side of a waterway has been conventionally known, and is disclosed in Patent Document 1, for example. The gate device disclosed in Patent Document 1 includes a gate body having a door portion that opens and closes a communication port of a water channel, a closed position in which the door portion closes the communication port, and an open position in which the communication port is opened. a support for supporting the upper end of the door so that the gate body can swing about a horizontal axis; with a cylinder. The hydraulic cylinder can be switched between a rod protruding driving state in which the piston rod protrudes from the cylinder body and a rod retracting driving state in which the piston rod is retracted into the cylinder body, and the hydraulic cylinder is controlled to the rod protruding driving state. As a result, the door portion (gate body) is displaced from the open position to the closed position, and the hydraulic cylinder is controlled in the rod projecting state so that the door portion is maintained at the closed position, thereby closing the communication passage. be kept.

Japanese Patent No. 4115380

However, in the gate device of Patent Literature 1, a problem may occur in the hydraulic cylinder in a state where the door portion is arranged in the closed position, that is, in a state in which the rod of the hydraulic cylinder is driven to protrude. If the hydraulic cylinder malfunctions, the rod protruding driving state cannot be maintained, and as a result, the water pressure from the outside water side swings the door from the closed position, possibly opening the communication port unintentionally.

The present invention provides a gate device capable of suppressing unintentional opening of a communication port due to water pressure from the outside water side.

In order to solve the above problems, the present invention provides a gate device for opening and closing a waterway, comprising a door portion for opening and closing a communication port between an inner water side and an outer water side in the waterway, and a door portion along the waterway. and an arm portion extending in the first direction from the upper end of the door portion when a direction from the inland water side to the outside water side is defined as a first direction. and the end of the arm portion in the first direction as a fulcrum, the gate body is horizontally moved between a closed position where the door closes the communication port and an open position where the communication port is opened. a support member that supports the gate body so as to be swingable around an axis; Further, in the closed position, the horizontal length along the waterway from the fulcrum to the center of gravity of the door is the same height as the lower end of the door. is equal to or greater than the length of a perpendicular line from

According to this gate device, the gate body can stay in the closed position by its own weight. Since the length is equal to or greater than the length of the vertical line from the fulcrum lowered to the same height as the lower end of the door, even if the door in the closed position is subjected to a large water pressure from the outside water side, the gate The body tends to stay in the closed position due to its own weight. Therefore, when the driving device malfunctions, the opening of the communication port due to the water pressure from the outside water side is suppressed.

In addition, since the gate body can stay in the closed position by its own weight, the driving device only has a function of displacing the gate body to the open position. Therefore, it is possible to simplify the configuration of the driving device.

In addition, since the end of the arm portion in the first direction (the direction from the inland water side to the outside water side) swings as a fulcrum, the gate body is displaced with the upper end portion of the door as a fulcrum, compared with the conventional gate device. Therefore, the amount of displacement of the door portion at the same degree of opening becomes smaller. Therefore, it is excellent in terms of ensuring stability and safety when the gate body operates.

In the gate device, L1 is the horizontal length along the water channel from the fulcrum to the center of gravity of the door when the gate body is placed in the closed position, W1 is the weight of the door, and the closed Pr is a pressure force with which a sealing member interposed between the door portion and the peripheral edge portion of the communication port at the position presses the door portion toward the open position, and the water channel acts on the door portion from the outside water side. The horizontal water pressure along the gate The body preferably satisfies (W1*L1)≧{(P+Pr)*Y}.

When the gate body is placed in the closed position, the gate body receives a moment (W1×L1) in the closing direction due to its own weight on the door portion, while the opening moment {( P+Pr)×Y} is applied to the door portion, but according to the configuration that satisfies the above formula, the closing moment due to its own weight is greater than the opening moment due to water pressure and the elastic force of the seal member. Therefore, regardless of the flow rate of the water channel, the gate body can always be stopped at the closed position by its own weight. The above "water pressure P" is the maximum value of the water pressure assumed in the channel.

In the gate device of each aspect described above, the door portion may include a submersible pump capable of feeding water from the inner water side to the outer water side while the gate body is placed in the closed position. .

As described above, the gate device of the present invention can reduce the amount of displacement of the door at the same degree of opening as compared with the conventional device. It is particularly useful for the above-described gate device in which a submersible pump is mounted on the door.

In the gate device, the drive device has a wire winding portion at a position on the first direction side of the fulcrum, and a winch that displaces the gate body by pulling up the door portion or the arm portion with a wire. , can be configured.

According to this configuration, it is possible to open and close the gate body with a relatively simple and inexpensive configuration. That is, as described above, since the gate body can stay in the closed position by its own weight, the gate body can be opened and closed with a relatively simple structure using a winch for pulling up the gate body as the driving device. It becomes possible to

Moreover, according to the driving device using the winch as described above, since the degree of freedom in the manner of routing the wire is high, the degree of freedom in the installation position of the driving device is improved.

In the gate device, the gate main body may include a weight placing portion on which a weight can be attached and detached.

According to this configuration, when there is a risk that a large water pressure is applied to the door from the outside water side, such as during a flood, or when the weight of the gate body is reduced due to circumstances such as part replacement due to maintenance, the weight can be mounted. By setting a weight on the placing portion, it becomes possible to compensate for the weight of the gate body.

According to the gate device of the present invention described above, it is possible to suppress unintentional opening of the communication port due to water pressure from the outside water side.

1 is a side view of a state in which a gate device according to an embodiment of the present invention is installed in a waterway; FIG. FIG. 2 is a schematic side view for explaining the dimensional relationship of the gate device of FIG. 1; It is a schematic side view of the gate apparatus of other embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated in detail, referring drawings. FIG. 1 is a side view of a state in which a gate device according to an embodiment of the present invention is installed in a waterway.

The gate device 1 of the present invention is for opening and closing the communication port 111 formed at the boundary between the inner water side A and the outer water side B in the water channel 100. In this embodiment, the gate device 1 is a water channel. It is installed on a concrete foundation 110 provided at 100 . In this embodiment, the foundation 110 is formed at a communication port 111 formed to communicate between the inner water side A and the outer water side B of the waterway 100, and at the peripheral edge portion of the communication port 111 excluding the lower edge. A door pressing portion 112 is provided. The door pressing portion 112 is provided with a sealing member 112a (corresponding to the sealing member of the present invention) made of an elastic material such as synthetic rubber.

As shown in FIG. 1, the gate device 1 of this embodiment includes a gate body 2, a support 3 that swingably supports the gate body 2, and a driving device 6 that displaces the gate body 2. .

The gate body 2 includes a door portion 4 that opens and closes the communication port 111 of the water channel 100 and an arm portion 5 that holds the door portion 4 .

The door portion 4 includes a substantially rectangular plate-shaped door body 41 and a submersible pump 42 attached to the door body 41 .

The door body 41 is larger than the communication port 111 of the water channel 100 and has a size capable of pressing the entire door pressing portion 112 of the foundation 110, and the door body 41 blocks the communication port 111 of the water channel 100. 1, the entire door pressing portion 112 is pressed to be watertight. Although not shown, the lower surface of the door body 41 is provided with a seal portion that makes the watertight state between the lower surface of the door body 41 and the water channel 100 in the closed position.

The submersible pump 42 is operated with the door portion 4 in the closed position, so that the submersible pump 42 is pumped from the inner water side A to the outer water side B of the water channel 100 through a water passage hole (not shown) provided in the door body 41 . It is for forcibly supplying water. The submersible pump 42 has a check valve 421 for preventing reverse flow of water from the outside water side B to the inside water side A.

In this embodiment, the arm portion 5 has a pair structure (only one arm portion is shown in FIG. 1) which is arranged on both sides in the width direction of the door portion 4 (door body 41). One end of each arm 5 is fixedly connected to the upper end of the door body 41 .

The other end of the arm portion 5 extends from the upper end portion of the door body 41 along the water channel 100 in the direction from the inner water side A to the outer water side B (first direction) when the door portion 4 is closed. The gate body 2 has an approximately L shape in side view with the arm portion 5 and the door portion 4 . A shaft support 52 connected to the support 3 is provided at the other end of the arm 5 .

The support 3 includes a support shaft 31 that rotatably supports the shaft support portion 52 of the arm portion 5 . The support shaft 31 is arranged so as to extend horizontally in the channel width direction perpendicular to the direction along the channel 100 and is rotatably supported by the foundation 110 .

By supporting the shaft support portion 52 of the arm portion 5 on the support shaft 31, the door portion 4 opens the communication port 111 at the closed position (the position indicated by the solid line in FIG. 1) at which the communication port 111 of the water channel 100 is closed. The gate body 2 is swingably supported around the support shaft 31 (horizontal axis) with the support shaft 31 as a fulcrum over the open position (the position indicated by the two-dot chain line in FIG. 1).

Further, as shown in FIG. 2, the horizontal length L1 along the water channel 100 from the support shaft 31, which is the fulcrum, to the center of gravity O1 of the door portion 4 is , the length of the vertical line from the support shaft 31 lowered to the same height as the lower end of the door portion 4 (door body 41) is longer than L2. In this example, L1>L2.

In addition, when the door portion 4 is in the closed position, a closing moment M2 in the counterclockwise direction in the drawing, which is applied to the gate body 2 by the weight of the door portion 4, is applied to the gate body 2 in the clockwise direction by water pressure. It is set to be larger than the opening moment M1.

More specifically, the closing moment M2 in the counterclockwise direction of the drawing applied to the gate body 2 by its own weight is M2=L1×W1, where W1 is the weight of the door portion 4. FIG. On the other hand, the clockwise opening moment M1 applied to the gate body 2 by the water pressure acts on the door portion 4 from the outside water side B with the pressing force Pr that the seal member 112a presses the door portion 4 toward the open position. Support on a horizontal straight line along the waterway passing through the horizontal water pressure P along the waterway and the center of the position where the water pressure P acts (the center position of the surface of the door body 41 where the water pressure P acts) Assuming that the length of the perpendicular drawn from the axis 31 is Y, M1=(P+Pr).times.Y. It is set so that the closing moment M2 due to its own weight is greater than the opening moment M1 due to water pressure, that is, (L1×W1)≧{(P+Pr)×Y}. The “water pressure P” is the maximum value of water pressure assumed in the waterway 100 .

The driving device 6 is configured by a winch in this embodiment, and includes a driving device main body 61, a wire winding section 62, and a wire 63 wound on the wire winding section 62, as shown in FIG. ing.

The tip of the wire 63 is wound from the driving device main body 61 around an arm engaging pulley 53 rotatably provided on the arm portion 5 , folded back by the arm engaging pulley 53 and returned to the driving device main body 61 . there is Then, the tip of the returned wire 63 is locked by a wire locking portion 611 provided on the driving device main body 61 .

Next, the operation of the gate device 1 of the embodiment will be described. To dispose the gate body 2 at the closed position, for example, the wire 63 is sent out from the wire winding section 62 of the driving device 6 . As a result, the gate body 2 is swung counterclockwise in the figure by the weight W1 of the door portion 4, and is automatically placed at the closed position.

When the door main body 41 is in the closed position, for example, assuming that the upper end of the door main body 41 is supported by the support shaft 131 (virtual shaft indicated by the dashed line in FIG. 2) as in the conventional example, , the closing moment M3 due to the weight W1 of the door portion 4 is M3=L3×W1, where L3 is the horizontal distance from the center of gravity position O1 of the door portion 4 to the support shaft 131 . On the other hand, in the present embodiment, the closing moment M2 applied to the gate body 2 by the weight W1 of the door portion 4 is L1×W1. Since L1 is sufficiently larger than L3, the closing moment M2 is sufficiently large as compared with the conventional example. Therefore, the gate body 2 can remain in the closed position by the dead weight W1 of the door portion 4, and even if a large water pressure is applied to the door portion 4 in the closed position from the outside water side B of the waterway 100, the door is closed. It is difficult to swing due to the weight W1 of the portion 4, and it is easy to stay in the closed position. Therefore, the driving device 6 only has a function of displacing the gate body 2 to the open position. It becomes possible to simplify the configuration of the device 6 .

In addition, by operating the submersible pump 42 while the gate body 2 is in the closed position, the water is forcibly forced from the inner water side A to the outer water side B of the water channel 100 through a water passage hole (not shown). It is possible to deliver a large amount of water.

In order to dispose the gate body 2 at the open position and open the communication port 111 , the drive device 6 is operated to wind the wire 63 on the wire winder 62 . During this winding, the arm engaging pulley 53 around which the wire 63 is wound is drawn toward the driving device main body 61, as indicated by the dotted line in FIG. As a result, the gate body 2 swings around the support shaft 31, and the gate body 2 is arranged at the open position.

Here, assuming that the upper end of the door body 41 is supported by a support shaft 131 (indicated by a dashed line in FIG. 2) when the gate body 2 swings, a conventional gate device is assumed. In this case, the locus of movement of the door portion 4 when the door portion 4 (lower end 44) is displaced from the bottom surface of the water channel 100 to a position of height h to open the communication port 111 is indicated by L5. On the other hand, when the gate body 2 of the above embodiment is similarly displaced from the bottom surface of the water channel 100 to a position of height h with the support shaft 31 as a fulcrum, the movement locus of the door portion 4 is as indicated by L4. be. As is clear from these trajectories L4 and L5, even with the same degree of opening, according to the gate device 1 of the above-described embodiment, the amount of displacement of the door portion 4 (the position of the center of gravity) is greater than that of the gate device of the conventional example. displacement) can be kept small. Therefore, according to the gate device 1 of the above-described embodiment, it is advantageous in ensuring stability and safety when the gate body 2 is operated.

In the above embodiment, the closing moment M2 of the gate body 2 is mainly due to the dead weight (W1) of the door portion 4. For example, as shown in FIG. The gate device 1 may be configured such that the portion 8 is provided in the door portion 4 and the closing moment M2 is obtained by the dead weight of the door portion 4 and the weight of the weight 7 . In this case, the closing moment M2 acting on the gate body 2 is M2=L1*W1+L6*W2. Here, L6 is the horizontal length from the support shaft 31 to the center-of-gravity position O2 of the weight mounting portion 8 (including the weight 7). That is, in the case of this configuration, the gate device 1 should satisfy (W1*L1+L6*W2)≧{(P+Pr)×Y}.

According to this configuration, the closing moment M2 acting on the gate body 2 becomes larger. Therefore, for example, when there is a risk that a large water pressure will be applied to the door portion 4 from the outside water side B, such as during a flood, or when the weight of the gate body is reduced due to circumstances such as part replacement due to maintenance, etc., depending on the situation. Accordingly, by placing a weight 7 having an appropriate weight on the weight placement portion 8, it is possible to reliably maintain the door portion 4 in the closed position.

Further, in the configuration in which the door portion 4 includes the weight mounting portion 8 as described above, the position of the weight mounting portion 8 is the horizontal position from the support shaft 31 to the center of gravity position O2 of the weight mounting portion 8 (including the weight 7). A position where the length L6 in the direction is larger than the length L1 from the support shaft 31 to the center of gravity O1 of the door portion 4 is preferable. As a result, the closing moment M2 acting on the door portion 4 can be efficiently increased. However, regarding the position of the weight mounting portion 8, the horizontal length L6 from the support shaft 31 to the center of gravity O2 of the weight mounting portion 8 (including the weight 7) is equal to the center of gravity of the door portion 4 from the support shaft 31. There is no problem even if the position is shorter than or equal to the length L1 to O1.

Further, although the driving device 6 is configured by a winch in the above embodiment, the driving device 6 may be configured by, for example, a hydraulic cylinder.

Further, in the above-described embodiment, the arm portion 5 is provided with the arm engaging pulley 53, and the arm portion 5 is pulled up by winding the wire 63 wound around the arm engaging pulley 53 by the driving device 6, that is, the gate is pulled up. The main body 2 is oscillated. For example, the drive device 6 is arranged above the door portion 4 (door main body 41), and the door portion 4 is directly pulled up by the drive device 6 without the intervention of the arm engaging pulley 53, thereby opening the gate. The main body 2 may be made to swing.

In the above-described embodiment, the arm portions 5 have a pair structure in which they are arranged on both sides of the door portion 4 (door main body 41) in the width direction. A configuration in which only one is provided in the central portion, or a configuration in which three or more are provided along the width direction of the door portion 4 may be employed.

Further, although the submersible pump 42 is provided on the door portion 4 in the above-described embodiment, the present invention is also applicable to a type of gate device in which the submersible pump 42 is not provided on the door portion 4 . It should be noted that, in terms of design, when the door portion is used in common between the gate device 1 having the door portion 42 provided with the submersible pump 42 and the gate device having the door portion not provided with the submersible pump, as shown in FIG. By adopting the structure of the door portion provided with the weight placing portion as shown in FIG. 2, the weight of the door portion not provided with the submersible pump 42 can be compensated for by the weight.

Further, when it is expected that a large water pressure will be applied to the door portion 4 from the outside water side B, such as during a flood, as a driving device for displacing the gate body 2, in addition to the driving device 6 described above, a hydraulic pressure A cylinder-type drive device may be provided.

Reference Signs List 1 gate device 2 gate body 3 support 4 door 5 arm 6 drive device 31 support shaft 42 submersible pump 100 water channel A inner water side B outer water side

Claims (5)

A gate device for opening and closing a waterway,
When the first direction is defined as a door portion that opens and closes a communication port between the inner water side and the outer water side of the water channel, and the direction along the water channel from the inner water side to the outer water side. and an arm portion extending in the first direction from the upper end of the door portion;
With the end of the arm portion in the first direction as a fulcrum, the door portion swings the gate body about a horizontal axis between a closed position in which the communication port is closed and an open position in which the communication port is opened. a freely supporting support;
a driving device for displacing the gate body from a closed position to an open position;
The gate body is able to stay in the closed position by its own weight, and in the state of being arranged in the closed position, the horizontal length along the waterway from the fulcrum to the center of gravity of the door part is longer than the length of a vertical line from the fulcrum lowered to the same height as the lower end of the door. The gate device according to claim 1,
L1 is the horizontal length along the waterway from the fulcrum to the center of gravity of the door when the gate body is placed in the closed position, W1 is the weight of the door, and the door is in the closed position. and the peripheral edge of the communication port, Pr is a pressing force that presses the door portion toward the open position, and the horizontal direction along the waterway acting on the door portion from the outside water When the water pressure of P is defined as P, and the length of the vertical line drawn down from the fulcrum onto a horizontal straight line along the water channel passing through the center of the position where the water pressure P acts is defined as Y, the gate body is formed by the following formula A gate device characterized by satisfying
(W1×L1)≧{(P+Pr)×Y} In the gate device according to claim 1 or 2,
A gate device according to claim 1, wherein the door portion includes a submersible pump capable of feeding water from an internal water side to an external water side in a state where the gate body is arranged at the closed position. In the gate device according to any one of claims 1 to 3,
The driving device is a winch that has a wire winding part at a position on the first direction side of the fulcrum, and displaces the gate body by pulling up the door part or the arm part with a wire. A gate device characterized by: In the gate device according to any one of claims 1 to 4,
A gate device according to the above-described gate device, wherein the gate body includes a weight mounting portion on which a weight can be attached and detached.

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