JP6405006B1 - Tsunami and storm surge flap gates - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tsunami and storm surge flap gate capable of maintaining a fully open state in a normal state and automatically closing a sluice opening when an earthquake having a predetermined seismic intensity or more occurs.
SOLUTION: A door 3 that is swingable around a door support shaft 22 and supported by a weight balance that closes or slightly opens an opening 11, a hydraulic cylinder 4 that opens and closes the door 3, and It has an earthquake detection means 5 for detecting the occurrence of an earthquake with a predetermined seismic intensity or higher, and a hydraulic control means 6 for controlling the hydraulic pressure of the hydraulic oil supplied to the hydraulic cylinder 4. The hydraulic pressure of the hydraulic oil supplied to the hydraulic cylinder 4 is controlled to keep the door 3 fully open, and the hydraulic oil is supplied to the hydraulic cylinder 4 when the earthquake detection means 5 detects an earthquake with a predetermined seismic intensity or higher. The pipeline 64 to be opened is automatically opened to release the hydraulic pressure applied to the hydraulic cylinder 4, and the door 3 is closed by the weight balance.
[Selection] Figure 1

Description

  The present invention relates to a tsunami flap gate and a storm surge flap gate for preventing a backflow caused by a tsunami or a storm surge.

  The sluice and lock gates are provided with openings for rivers, lakes, coasts, etc. for drainage. The opening is provided with a gate to prevent backflow caused by a tsunami or storm surge. Conventionally, gates that prevent this backflow are often manually opened and closed by an administrator, and there is a problem that management costs such as personnel costs are high. In addition, there is a problem that there is a risk of being caught in a tsunami or storm surge on the way to the site or during opening and closing work.

  Therefore, in order to solve such problems, gates have been proposed that automatically open and close according to fluctuations in the water flow. For example, Japanese Patent Application Laid-Open No. 2012-57322 discloses a flap gate including a door body that swings due to a difference in internal and external water pressure at an opening portion of a confluence point between an inner water side and an outer water side, A rotating shaft provided; a swing arm provided at a lower portion of the rotary shaft; the door attached to the swing arm at a predetermined angle with respect to the swing arm; Provided on the opposite side of the door body across the rotating shaft, a balance weight for adjusting the swing of the door body, an adjusting arm provided on the outside water side of the rotating shaft, and movable to the adjusting arm An adjustment weight for adjusting the rotational moment of the door body, and a flap gate provided at a lower inner side of the door body and having a float with a buoyancy inside the center of gravity of the door body are disclosed. (Patent Document 1). According to this Patent Document 1, the balance of the moment of the entire gate can be finely adjusted, the door body is supported so as to have a sufficient gap with the opening, and the reaction to the fluctuation of the water level can be achieved even in a low water level state. It is described that a good flap gate can be provided.

JP 2012-57322 A

  However, in the invention described in Patent Document 1, there is a problem that drifting substances from the upstream are blocked by the door body and accumulate in the vicinity of the opening portion, thereby hindering opening and closing. Normally, the door body is fully opened. There is a need to keep it.

  On the other hand, because the tsunami flows backward through the sluice and causes great damage to the upstream area, it is necessary to automatically close the sluice gate opening automatically in the event of a large earthquake that may cause a tsunami. There is. However, in the invention described in Patent Document 1, since the opening and closing of the door body is due to the difference in internal and external water pressure, it is not automatically closed even if a large earthquake occurs.

  The present invention has been made in order to solve the above-described problems, and normally maintains a fully open state and automatically opens a sluice gate when an earthquake of a predetermined seismic intensity or more occurs. The purpose is to provide a tsunami and storm surge flap gate that can be closed.

  The tsunami and storm surge flap gates according to the present invention are designed to automatically prevent the opening of the sluice gate without human intervention when an earthquake of a predetermined seismic intensity or higher is detected in order to suppress damage from the tsunami caused by the earthquake. In order to solve the problem of occlusive closure, a tsunami and storm surge flap gate that closes a sluice gate opening in the event of an earthquake to prevent backflow due to a tsunami, the door provided above the opening A door body that is swingable around a body support shaft and supported by a weight balance that closes or slightly opens the opening, a hydraulic cylinder that opens and closes the door body, and an earthquake that exceeds a predetermined seismic intensity And an oil pressure control means for controlling the oil pressure of the hydraulic oil supplied to the hydraulic cylinder. The oil pressure control means is normally supplied to the hydraulic cylinder. The hydraulic pressure of the hydraulic oil is controlled to keep the door body in a fully open state, and the piping for supplying the hydraulic oil to the hydraulic cylinder is automatically provided when the earthquake detecting means detects an earthquake of a predetermined seismic intensity or higher. The hydraulic pressure applied to the hydraulic cylinder is released, and the door body is closed by the weight balance.

  According to another aspect of the present invention, in order to solve the problem of using an electromagnetic valve to open a piping path, the hydraulic control means includes: an electromagnetic valve that opens and closes the piping path; A valve opening / closing control device for controlling the electromagnetic valve, and when the earthquake detecting means detects an earthquake having a predetermined seismic intensity or more, the valve opening / closing control device automatically controls the electromagnetic valve to open. The pipe line may be opened.

  Furthermore, as one aspect of the present invention, in order to solve the problem of automatically opening the piping when the opening and closing of the solenoid valve cannot be electrically controlled due to the occurrence of a power failure, the hydraulic control means includes the piping A solenoid valve that opens and closes the solenoid valve, a valve opening and closing control device that controls opening and closing of the solenoid valve, and a biasing member that biases the solenoid valve in the opening direction. When the device holds the solenoid valve in the closed state and a power failure occurs, the holding force of the solenoid valve by the valve opening / closing control device is released, and the biasing member is moved by the biasing force in the opening direction. The piping path may be opened by opening an electromagnetic valve.

  In addition, as one aspect of the present invention, when a pipe line cannot be opened due to a failure or malfunction of an earthquake detection means, a hydraulic control means, etc., a tsunami occurs due to an earthquake of less than a predetermined seismic intensity, or whether a storm surge occurs In order to solve the problem of automatically opening the pipe line in response to a rise in water level due to a tsunami or storm surge, the hydraulic control means is an open valve that can open the pipe line by lever operation. And a float that is arranged below the lever and floats and sinks depending on the water level, and a float pipe that houses the float and includes a water guide pipe that introduces outside water downstream from the opening. And when the water level in the float pipe is lower than a predetermined water level, the open valve is kept closed, and the water level in the float pipe is in accordance with the water level of the outside water. When elevated above water level, it may be to open the pipe passage to the open valve by the float has risen to operate the lever to the open state by the buoyancy.

  According to the present invention, the fully open state can be maintained in a normal state, and the sluice opening can be automatically closed when an earthquake having a predetermined seismic intensity or more occurs.

It is a side view showing one embodiment of a tsunami and storm surge flap gate according to the present invention. It is a perspective view which shows the door body support means, door body, and hydraulic cylinder in the tsunami and storm surge flap gate of this embodiment. It is a perspective view which shows the door body support means and hydraulic cylinder in this embodiment. It is a perspective view which shows the door body in this embodiment. It is a side view which shows the weight arm in this embodiment, a door body boss | hub part, and a support arm. It is a schematic diagram which shows the hydraulic cylinder and hydraulic control means in this embodiment. It is a schematic diagram which shows the hydraulic cylinder and hydraulic control means which were connected by the contraction mode in this embodiment. It is a schematic diagram which shows the hydraulic cylinder and hydraulic control means which were connected by the expansion | extension mode in this embodiment. It is a schematic diagram which shows the hydraulic cylinder and hydraulic control means which were connected by the holding mode in this embodiment. It is a schematic diagram which shows the hydraulic cylinder and hydraulic control means by which the pipe line is closed by the closed mode in this embodiment. It is a schematic diagram which shows the hydraulic cylinder and hydraulic control means by which the pipe line is open | released by the open mode in this embodiment. It is the (a) front sectional view and the (b) side sectional view showing the piping way open unit in this embodiment. It is a schematic diagram which shows the hydraulic cylinder and hydraulic control means by which the piping line is open | released by the open valve in this embodiment. It is a figure which shows the connection method of the float and lever of an open valve in other embodiment. It is a side view which shows the state which closed the opening part by the tsunami and storm surge flap gate of this embodiment.

  Hereinafter, an embodiment of a tsunami and storm surge flap gate according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, a tsunami and storm surge flap gate 1 according to this embodiment includes a door body supporting means 2 provided above an opening 11 of a sluice 10 and a door supported by the door body supporting means 2. Body 3, hydraulic cylinder 4 that opens and closes this door body 3, earthquake detection means 5 that detects the occurrence of an earthquake of a predetermined seismic intensity or more, and hydraulic control means that controls the hydraulic pressure of hydraulic oil supplied to the hydraulic cylinder 4 6. Hereinafter, each configuration will be described in detail.

  The sluice 10 in the present invention includes a sluice, a sluice, a sluice, and the like, and has an opening 11 that discharges river water, domestic wastewater, and the like into a river, lake, sea, or the like. In addition, as shown in FIG. 2, the opening 11 in the present embodiment opens in a horizontally long rectangular shape, and closes the entire opening 11 by providing two tsunami and storm surge flap gates 1 together. However, in the following, only one tsunami and storm surge flap gate 1 will be described, and the other tsunami and storm surge flap gates 1 have the same structure and operation, and thus description thereof is omitted.

  The door body support means 2 supports the door body 3 in a swingable manner above the opening 11 of the sluice 10. As shown in FIG. 2, the door body support means 2 in the present embodiment has four door body support units 21 so that the enlarged door body 3 can be supported at multiple points. Note that the total number of door body support units 21 is not limited to four, and can be appropriately selected according to the weight of the door body 3, but when supporting the enlarged door body 3, at least Three or more are preferable.

  As shown in FIG. 3, each door body support unit 21 includes a door body support shaft 22 that supports the door body 3, and a bearing bracket 23 that supports both ends of the door body support shaft 22.

  The door body support shaft 22 is a columnar bar. Moreover, it has a pair of left and right spacers 24 fitted at the center position on the left and right sides so as to be higher by one step according to the gap width between the door boss portion 33 and the bearing bracket 23. The left and right ends of the door support shaft 22 are fixed to the bearing bracket 23 so as not to rotate. The four door support shafts 22 are arranged on the same axis so that the door 3 can be smoothly swung.

  In addition, in this embodiment, in order to support the enlarged door body 3 at multiple points, the door body support shaft 22 divided into a plurality of parts is used. However, the present invention is not limited to this, and the weight of the door body 3 is not limited thereto. May be relatively light, the door support shaft 22 may be composed of a single long shape.

  The bearing bracket 23 is for fixing the door body support shaft 22 above the opening 11. As shown in FIG. 3, the tip end portion 25 has an insertion hole 26 through which the door body support shaft 22 is inserted. Is formed. Moreover, the front-end | tip part 25 is installed so that it may protrude in the external water side from the outer side upper surface of the structure which comprises the sluice 10, as shown in FIG.

  Further, as shown in FIG. 3, the pair of left and right bearing brackets 23 and 23 in the two door body support units 21 have a guide member 7 for guiding a guide roller 48 provided at the distal end portion of the hydraulic cylinder 4. Is provided. The guide member 7 is formed in an arc shape along an arc-shaped locus along which an engagement stopper 8 described later moves. In addition, the said guide member 7 is not limited to what is provided in the bearing bracket 23, For example, you may be fixed to the outer upper surface of the structure which comprises the sluice 10.

  The door body 3 opens and closes the opening 11 of the sluice 10, and in this embodiment, as shown in FIG. 4, the door body main body 31 which can close the opening 11 of the sluice 10, and each door body support A plurality of door body boss portions 33 that are pivotally supported by respective shafts 22 via bearings 32 made of slide bearings or rolling bearings, and are fixed to the door body boss portions 33 and fixed to the door body boss portions 33. A plurality of support arms 34 supporting the door body 31 and a weight arm 35 fixed to the door body boss portion 33 are provided.

  The door body 31 is formed to be slightly larger than the opening 11 so that the opening 11 can be completely closed. In the present embodiment, the door body 31 is formed in a substantially rectangular shape. The door body 31 is made of a steel plate or the like, and has a lattice-like shape formed on the outside water side surface by a steel material such as H-shaped steel, I-shaped steel, or C-shaped steel so that it can withstand external force such as tsunami water pressure. The reinforcing frame 36 is fixed by welding or the like. In addition, the steel material used for the reinforcement frame 36 is not limited to the thing of standard specifications, such as JIS, You may select suitably from the thing outside a specification.

  A door body float 37 is provided on the inner water side surface of the door body 31. This float 37 for door bodies assists opening and closing of the door body 3 by the buoyancy obtained according to the water level on the outside water side or the water level on the inside water side. In this embodiment, as shown in FIG. , And is provided so as to protrude toward the inner water surface at a predetermined height that does not contact the opening 11.

  The door boss 33 is pivotally supported with respect to the door support shaft 22 and is formed in a thick cylindrical shape capable of supporting the weight of the door body 31. A bearing 32 made of a sliding bearing or a rolling bearing for reducing the frictional force with the door body support shaft 22 is provided on the inner peripheral surface of the door body boss portion 33 that is in contact with the door body support shaft 22. In this embodiment, in order to support the door body 3 enlarged by each door body boss | hub part 33, the slide bearing with higher load bearing performance is used. As shown in FIG. 2, the door boss 33 is pivotally supported at an intermediate position between the spacers 24 so as not to be displaced in the left-right direction on the door support shaft 22.

  In the present embodiment, the door boss 33 is configured to rotate around the fixed door support shaft 22, but the present invention is not limited to this, and the door boss 33 is connected to the door. The door support shaft 22 may be rotatably supported by a bearing bracket 23 by being fixed to the body support shaft 22. The bearing 32 is not limited to a sliding bearing, and a rolling bearing having a high ability to reduce frictional force may be used according to the weight of the door body 31 or the like.

  The support arm 34 is fixed to the door body boss portion 33 and supports the door body main body 31. As shown in FIG. 4, the support arm 34 in the present embodiment extends downward from the door body boss portion 33 and is fixed to the outer water surface side of the door body main body 31.

  The weight arm 35 supports a balance weight 38 that adjusts the weight balance of the entire door body 3 in order to smoothly open and close the door body 3, and as shown in FIG. 31) is fixed so as to extend obliquely upward on the outside water side from the door body boss portion 33 when it is in a vertical state. In the present embodiment, as shown in FIG. 2, one weight arm 35 is fixed to each of the door body boss portions 33 located at the left and right ends of the four door body boss portions 33 and is located at the center. A pair of left and right weight arms 35, 35 are fixed to the two door body boss portions 33.

  As shown in FIGS. 1 and 5, the weight arm 35 has an engagement stopper 8 that engages with the tip of the piston rod 41 of the hydraulic cylinder 4 to transmit hydraulic power from the hydraulic cylinder 4. Is provided. That is, the weight arm 35 in the present embodiment also has a function as a torque arm for generating a torque for swinging the door body 3 by the hydraulic cylinder 4.

  As shown in FIG. 5, the engagement stopper 8 is formed in a semicircular shape, and is provided so that its concave surface faces the outside water side. Thus, the engagement stopper 8 is engaged with the distal end shaft 47 of the distal end portion of the piston rod 41 only when the engagement stopper 8 is swung in the opening direction by the hydraulic cylinder 4. It is possible to leave. As shown in FIG. 4, the engagement stopper 8 in this embodiment is provided on each weight arm 35, 35 provided in a pair of left and right with respect to the door body boss portion 33, and the tip end portion of the piston rod 41. In FIG. 2, the left and right ends of the tip shaft 47 projecting to the left and right can be engaged.

  The weight arm 35 supports a balance weight 38 at the upper end. When the door body 3 is in the open state, the balance weight 38 is adjusted to such a weight balance that the door body main body 31 side is slightly heavier around the door body support shaft 22, and no external force other than gravity is applied. The door 3 closes the opening 11 by its own weight balance or opens slightly at the same angle as the initial opening of the conventional flap gate. In the present embodiment, the balance is adjusted to completely close the opening 11. As shown in FIGS. 2 and 4, the balance weight 38 is supported between the weight arms 35 at the upper end portion of the weight arm 35. In particular, in the present embodiment, the door body boss portion 33 to which the pair of left and right weight arms 35, 35 are fixed is provided side by side, and between the adjacent weight arms 35 between the door body boss portions 33. Also, the balance weight 38 is supported. Thereby, the space between the weight arms 35 generated to support the door body main body 31 at multiple points by the plurality of door body support shafts 22 is effectively used.

  The hydraulic cylinder 4 is an actuator that expands and contracts by hydraulic pressure. As shown in FIG. 6, the hydraulic cylinder 4 in the present embodiment includes a cylindrical cylinder case 42 and a piston rod 41 that reciprocates by hydraulic pressure in the cylinder case 42.

  The piston rod 41 includes a piston portion 43 that reciprocates in the cylinder case 42 and a rod portion 44 that extends from the piston portion 43 and that protrudes from the cylinder case 42. The piston portion 43 divides the inside of the cylinder case 42 into two oil chambers, a front end side oil chamber 45 and a rear end side oil chamber 46, and injects hydraulic oil into one oil chamber and supplies the other oil. The hydraulic oil is discharged from the chamber so as to move along the cylinder case 42. That is, as the piston portion 43 moves along the cylinder case 42, the length of the rod portion 44 protruding from the cylinder case 42 changes, so that the entire hydraulic cylinder 4 expands and contracts.

  Further, as shown in FIGS. 2 and 3, the rod portion 44 in the present embodiment is provided with a tip shaft 47 at the tip portion so as to be orthogonal to the rod portion 44. The tip shaft 47 is provided so as to protrude left and right, and engages with an engagement stopper 8 provided on each of the pair of left and right weight arms 35. In addition, guide rollers 48 formed in a circular shape like a tire are rotatably provided at the left and right ends of the tip shaft 47 so as to easily move along the guide member 7 provided on the bearing bracket 23. ing.

  Next, the earthquake detection means 5 will be described. The earthquake detection means 5 is for detecting the occurrence of an earthquake having a predetermined seismic intensity or higher. The seismic detection means 5 in the present embodiment functions as a seismometer that measures the seismic intensity of an earthquake, and determines whether or not a seismic intensity equal to or greater than a predetermined seismic intensity has been detected. Has a function of transmitting the earthquake information as a data signal to the valve opening / closing control device 66 of the hydraulic control means 6. In this embodiment, the earthquake detection means 5 determines whether or not a seismic intensity equal to or greater than a predetermined seismic intensity has been detected. However, the present invention is not limited to this, and the earthquake detection means 5 determines the seismic intensity of the earthquake. Information relating to the detected seismic intensity is transmitted to the valve opening / closing control device 66 of the hydraulic control means 6, and the valve opening / closing control device 66 may determine whether the seismic intensity is equal to or greater than a predetermined seismic intensity. .

  Next, the hydraulic control means 6 controls the hydraulic pressure of the hydraulic cylinder 4, and normally controls the hydraulic pressure of the hydraulic oil supplied to the hydraulic cylinder 4 to keep the door body 3 fully open, When the detection means 5 detects an earthquake with a predetermined seismic intensity or more, the piping 64 for supplying the hydraulic oil to the hydraulic cylinder 4 is automatically opened to release the hydraulic pressure applied to the hydraulic cylinder 4, and the door The body 3 is closed by its weight balance. The closed state in the present embodiment includes a state in which the opening 11 is completely closed and a state in which the opening is slightly opened at an angle similar to the initial opening of the conventional flap gate.

  As shown in FIG. 6, the hydraulic control means 6 in the present embodiment mainly has a hydraulic unit 70 and a valve opening / closing control device 66. The hydraulic unit 70 stores a hydraulic pump 61 that supplies hydraulic oil to the hydraulic cylinder 4, a switching electromagnetic valve 62 that switches a destination of the hydraulic oil to each oil chamber of the hydraulic cylinder 4, and the hydraulic oil. The hydraulic oil tank 63 to be connected to each other, a piping path 64 that connects these components, an electromagnetic valve 65 that opens the piping path 64, and a pilot check valve 71 that keeps the door 3 fully opened. Further, in the present embodiment, according to the water level on the outside water side as a backup for the case where the solenoid valve 65 does not operate, the case where a tsunami occurs due to an earthquake of less than a predetermined seismic intensity, or the case where a storm surge occurs. A pipe opening unit 9 including an opening valve 92 that opens the pipe 64 is provided.

  The hydraulic pump 61 supplies hydraulic oil to the hydraulic cylinder 4 and includes a general hydraulic pump used for supplying oil to the hydraulic cylinder 4.

  The switching solenoid valve 62 switches the switching valve body 67 for switching between the front end side oil chamber 45 and the rear end side oil chamber 46 communicated with the hydraulic pump 61 and the switching valve body 67 (not shown). And a solenoid.

  As shown in FIG. 7, the switching valve body 67 connects the hydraulic pump 61 and the front end side oil chamber 45 of the hydraulic cylinder 4 and connects the rear end side oil chamber 46 and the hydraulic oil tank 63 to the hydraulic pressure. In contrast to the contraction mode for contracting the cylinder 4 and the contraction mode, as shown in FIG. 8, the hydraulic pump 61 and the rear end side oil chamber 46 of the hydraulic cylinder 4 are connected and the front end side oil chamber 45 and the hydraulic oil are connected. The expansion mode in which the hydraulic cylinder 4 is extended by connecting the tank 63, and the pipe 64 of the hydraulic pump 61, the hydraulic cylinder 4 and the hydraulic oil tank 63 is shut off by the pilot check valve 71 as shown in FIG. A holding mode for holding the length of the hydraulic cylinder 4.

  The solenoid uses electromagnetic force to convert electrical energy into mechanical motion, and in this embodiment, the switching valve body 67 is switched to the left or right to appropriately switch to the contraction mode, the extension mode, or the holding mode. It is supposed to be.

  The pilot check valve 71 shuts off the flow of the hydraulic oil in the pipe 64 in the holding mode and holds the door 3 in a fully open state. The hydraulic cylinder 4 is supplied until the hydraulic oil is supplied by the hydraulic pump 61. Holds the pressure on the side.

  The electromagnetic valve 65 is a hydraulic release valve for releasing the hydraulic pressure applied to the hydraulic cylinder 4 by opening the piping 64 connected to the hydraulic cylinder 4. The electromagnetic valve 65 in the present embodiment moves the valve body 68 to the open side by its biasing force when the valve body 68, a solenoid for switching the valve body 68 as appropriate, and the electromagnetic force by the solenoid is lost. And an urging member 69.

  The valve body 68 in the present embodiment is provided so as to communicate with a piping path 64 between the hydraulic cylinder 4 and the switching electromagnetic valve 62. As shown in FIG. 10, each oil chamber of the hydraulic cylinder 4 is provided. And a switching mode in which the switching solenoid valve 62 is communicated to close the piping path 64, and as shown in FIG. 11, the front end side oil chamber 45 and the rear end side oil chamber 46 of the hydraulic cylinder 4 are connected to each other. And an open mode in which the pipe 64 is opened by communication. That is, the open mode is a mode in which the pipe line 64 is opened by communicating the front end side oil chamber 45 and the rear end side oil chamber 46 and the hydraulic pressure applied to the hydraulic cylinder 4 is released at once.

  The solenoid of the electromagnetic valve 65 can be switched between a closed mode and an open mode by switching the valve body 68 as appropriate. The solenoid normally holds the valve body 68 in the closed mode against a biasing force of a biasing member 69 described below. On the other hand, at the time of a power failure, the holding power is lost.

  The biasing member 69 exerts a biasing force with respect to the valve body 68 in the position direction of the open mode. The urging member 69 in the present embodiment is constituted by a string spring, and the valve body 68 held in the closed mode by the solenoid is automatically moved to the open mode position in accordance with the loss of the holding force by the solenoid. It is designed to move. The urging member 69 is not limited to the string spring, and may be appropriately selected from various elastic materials such as rubber and leaf springs.

  The valve opening / closing control device 66 controls the switching electromagnetic valve 62 and the electromagnetic valve 65. In this embodiment, a current is appropriately supplied to the switching electromagnetic valve 62 and the solenoid of the electromagnetic valve 65 by a switch operation or the like. And control. Further, when the valve opening / closing control device 66 receives a data signal related to earthquake information transmitted from the earthquake detection means 5 when a seismic intensity equal to or greater than a predetermined seismic intensity is detected, a current is supplied to the solenoid of the electromagnetic valve 65. Supplying is switched to the open mode, and the pipe line 64 is opened to release the hydraulic pressure applied to the hydraulic cylinder 4.

  The pipe opening unit 9 is less than a predetermined seismic intensity when the electromagnetic valve 65 is not moved to the open mode position for some reason such as failure or malfunction of the earthquake detection means 5, the valve opening / closing control device 66 and the electromagnetic valve 65. When a tsunami occurs due to this earthquake, or when a storm surge occurs regardless of the presence or absence of the earthquake, the piping 64 is automatically opened in accordance with the level of the external water rising due to the tsunami or storm surge. As shown in FIG. 12, the pipeline opening unit 9 in this embodiment is connected to the release valve 92 that can release the hydraulic pressure of the pipeline 64 by the operation of the lever 91, and the lever 91 and according to the water level. A float 93 that floats and sinks, and a float pipe 95 that houses the float 93 and includes a water guide pipe 94 that introduces external water downstream of the opening 11 into the interior.

  The release valve 92 can release the hydraulic pressure of the pipeline 64 by operating the lever 91. As shown in FIG. 6, the open valve 92 is provided so as to communicate with a piping path 64 between the hydraulic cylinder 4 and the switching electromagnetic valve 62, as with the electromagnetic valve 65. As shown in FIG. 12, the piping path 64 is drawn into the float pipe 95 and arranged in the float pipe 95. Further, when the lever 91 is operated, the release valve 92 in the present embodiment communicates the front end side oil chamber 45 and the rear end side oil chamber 46 and opens the piping 64 as shown in FIG. It is like that.

  The lever 91 is a rod-shaped member, and is pivotally supported in the float pipe 95 so as to be swingable around the base end as shown in FIG. In the present embodiment, the release valve 92 is connected to the distal end side of the lever 91, and by opening the lever 91 upward, the valve is opened and the piping 64 is opened. Note that the release valve 92 is not limited to the valve that opens when the lever 91 is pushed upward, and may be configured such that the valve opens when the lever 91 is pushed down using a fulcrum. Further, the connection to the release valve 92 is not limited to the distal end side of the lever 91, and may be connected to the proximal end side as shown in FIG.

  The float 93 is arranged below the lever 91 of the release valve 92 and operates the lever 91 by raising and lowering according to the water level. As shown in FIG. 12, the float 93 in this embodiment is coupled to a weight 97 via a pulley 96. The weight 97 adjusts the weight of the float 93 and the buoyancy of the float 93. The float 93 is disposed directly below the lever 91 of the release valve 92. When the water level in the float pipe 95 rises to a predetermined height, the float 93 comes into contact with the lever 91 of the release valve 92 and moves the lever 91 upward. The structure is pushed up.

  The operation of the lever 91 by the float 93 is not limited to the operation in which the float 93 abuts on the lever 91 and pushes it up. For example, as shown in FIG. The lever 91 may be directly pushed up when it is lifted by buoyancy by being connected to the lever 91. In addition, in the case of a mechanism that opens the piping 64 by pushing down the lever 91 of the release valve 92 downward, although not shown, a link mechanism or a gear mechanism is interposed between the float 93 and the lever 91 so that the float 93 is disposed. The lever 91 may be pushed down by raising.

  The float pipe 95 is a pipe that accommodates the float 93 and includes a water guide pipe 94 for introducing outside water into the inside. As shown in FIG. 1, the float pipe 95 is disposed on the outside water side with respect to the sluice 10. It is supposed to be.

  Next, the operation of each component in the tsunami and storm surge flap gate 1 of the present embodiment will be described.

  In the hydraulic control means 6 in the present embodiment, the door body 3 is normally kept in a fully opened state so as not to obstruct the drainage from the opening portion 11 at normal times. Therefore, first, a case where the door body 3 is held in a fully opened state will be described.

  In order to contract the hydraulic cylinder 4, the valve opening / closing control device 66 supplies a current to the solenoid of the switching electromagnetic valve 62 to switch the switching valve body 67 to the contraction mode. Further, the valve opening / closing control device 66 supplies a current to the solenoid of the electromagnetic valve 65 so as to prevent the piping 64 from being opened, thereby holding the valve body 68 in the closed mode. As a result, as shown in FIG. 7, the hydraulic pump 61 and the front end side oil chamber 45 of the hydraulic cylinder 4 are connected, and the rear end side oil chamber 46 and the hydraulic oil tank 63 are connected.

  The hydraulic pump 61 injects hydraulic oil into the oil chamber 45 at the front end side of the hydraulic cylinder 4 via the pipe line 64. The piston portion 43 of the piston rod 41 is pushed by the hydraulic pressure of the injected hydraulic oil and moves to the rear end side. On the other hand, the hydraulic oil accumulated in the oil chamber 46 at the rear end side of the hydraulic cylinder 4 is pushed by the piston portion 43 and discharged to the hydraulic oil tank 63 through the piping 64. Thus, when the piston part 43 moves by hydraulic pressure, the entire length of the hydraulic cylinder 4 contracts.

  Further, when the hydraulic cylinder 4 contracts, the tip shaft 47 provided at the tip of the piston rod 41 engages with the engagement stopper 8 provided at the weight arm 35. In this embodiment, it engages with the engagement stopper 8 provided in each of the weight arms 35 provided in a pair of left and right with respect to the door body boss portion 33. Therefore, the tip shaft 47 can attract the weight arm 35 evenly on the left and right, and it is not necessary to apply a twisting stress to the lot portion.

  When the hydraulic cylinder 4 contracts, the guide roller 48 moves along the arc of the guide member 7. For this reason, it can move smoothly while maintaining the state where the tip shaft 47 is engaged with the engagement stopper 8. Further, a balance weight 38 is provided at the upper end of the weight arm 35, and the door body 31 is balanced so that it is slightly heavier. Therefore, the contraction force required for full opening is small, and it can be opened with a light force. Can be rotated in the direction.

  Then, when the hydraulic cylinder 4 is completely contracted, as shown in FIG. 1, the weight arm 35 is pulled toward the inner water side, and the door body 31 is fully opened. In this state, as shown in FIG. 9, the valve opening / closing control device 66 supplies a current to the solenoid of the switching electromagnetic valve 62 to switch the switching valve body 67 to the holding mode. As a result, the pilot check valve 71 blocks the hydraulic pump 61, the hydraulic cylinder 4, and the piping 64 of the hydraulic oil tank 63, and the hydraulic oil cannot move. Therefore, the length of the hydraulic cylinder 4 is held in this contracted state, and the door body 3 is held in a fully opened state.

  Next, a case where an earthquake having a predetermined seismic intensity or more has occurred will be described. The earthquake detection means 5 measures the seismic intensity of the earthquake, and if an earthquake greater than a predetermined seismic intensity is detected, the earthquake information is transmitted to the valve opening / closing control device 66 of the hydraulic control means 6.

  When the valve opening / closing control device 66 receives earthquake information having a seismic intensity greater than or equal to a predetermined level from the earthquake detection means 5, the valve element 68 in the closed mode position by supplying current to the solenoid of the electromagnetic valve 65 is shown in FIG. 11. Thus, the mode is switched to the open mode. Thereby, the front end side oil chamber 45 and the rear end side oil chamber 46 of the hydraulic cylinder 4 are communicated, and the piping path 64 is opened. In this embodiment, since the solenoid valve 65 is used for opening the piping path 64, the operating speed of the solenoid valve 65 is fast, and the piping path 64 can be opened at a stretch. Further, the hydraulic pressure of the front end side oil chamber 45 is maintained higher than the hydraulic pressure of the rear end side oil chamber 46 in a state where the door body 3 is held in the fully open state. Therefore, when the pipe path 64 is opened, the hydraulic oil flows from the front end side oil chamber 45 to the rear end side oil chamber 46, and the piston rod 41 moves toward the front end side oil chamber 45. Then, all the hydraulic pressure applied to the hydraulic cylinder 4 is released. The piston rod 41 whose hydraulic pressure has been released can freely move in the cylinder case 42 in the direction of the distal end side hydraulic chamber 45.

  The door body 3 is supported with a heavy weight balance on the door body body 31 side with respect to the weight arm 35 side, so that the fully open state cannot be maintained, and the opening 11 is closed by its own weight as shown in FIG. . As described above, in the tsunami and storm surge flap gate 1 according to the present embodiment, even if a tsunami occurs due to an earthquake having a predetermined seismic intensity or higher, the opening 11 is automatically closed. Back flow to the internal water side (upstream side) due to can be prevented.

  Next, a case where power supply is interrupted due to a power failure will be described. When a large earthquake occurs, a power failure may occur temporarily or for a long time. For this reason, if electricity is not supplied to the earthquake detection means 5 and the hydraulic control means 6 due to a power failure, the electrical operation cannot be performed.

  In the tsunami and storm surge flap gate 1 of this embodiment, when the supply of electricity is interrupted due to a power failure, the electromagnetic force of the solenoid of the solenoid valve 65 is lost, and the holding force that holds the valve body 68 in the closed mode. Is released. At this time, as shown in FIG. 11, the urging member 69 moves the valve body 68 of the electromagnetic valve 65 from the closed mode to the open mode by the urging force. Thereby, the front end side oil chamber 45 and the rear end side oil chamber 46 of the hydraulic cylinder 4 are communicated, and the piping path 64 is opened. The rest is the same as the case where the pipe path 64 is opened by the valve opening / closing control device 66, the hydraulic pressure applied to the hydraulic cylinder 4 is released, and the door body 3 closes the opening 11 by its own weight as shown in FIG. To do.

  Thus, in the tsunami and storm surge flap gate 1 of the present embodiment, the opening 11 can be automatically closed even if the supply of electricity is interrupted due to a power failure.

  Next, when the piping 64 is not opened by the solenoid valve 65 due to some cause such as failure or malfunction, a tsunami occurs due to an earthquake of less than a predetermined seismic intensity, or a storm surge regardless of whether there is an earthquake A case where the above occurs will be described. Although a large earthquake has occurred and energized, the valve body 68 of the solenoid valve 65 does not automatically enter the open mode due to a failure or malfunction of the earthquake detection means 5, the hydraulic control means 6 and the solenoid valve 65. Can be considered. In addition, if the epicenter is far away, a tsunami may occur even if the seismic intensity is less than a predetermined seismic intensity. In addition, storm surges may occur regardless of the earthquake.

  Therefore, in the tsunami and storm surge flap gate 1 of the present embodiment, the pipeline opening unit 9 automatically opens the pipeline 64 in accordance with the level of the external water that has risen due to the tsunami and storm surge. Specifically, the float pipe 95 allows outside water to flow into the inside via the water guide pipe 94. Since the water level in the float pipe 95 becomes the same water level, when the water level on the outside water side rises due to the tsunami, the water level in the pipe also rises. The float 93 rises by its buoyancy as the water level rises. Since the float 93 in this embodiment is provided with the weight 97 via the pulley 96, it rises with the water level with good response.

  When the float 93 rises above a predetermined water level, it comes into contact with the lever 91 and pushes the lever 91 upward. By the operation of the lever 91 by the float 93, the release valve 92 opens the piping 64 as shown in FIG. The rest is the same as the case where the pipe path 64 is opened by the valve opening / closing control device 66 or the urging member 69, the hydraulic pressure applied to the hydraulic cylinder 4 is released, and the door 3 is moved by its own weight as shown in FIG. The opening 11 is closed.

  As described above, in the tsunami and storm surge flap gate 1 of the present embodiment, when the piping 64 is not opened by the electromagnetic valve 65 for any reason, a tsunami is generated due to an earthquake of less than a predetermined seismic intensity. In this case, the opening 11 can be automatically closed even when a storm surge occurs regardless of whether there is an earthquake.

  Note that the tsunami and storm surge flap gate 1 of the present embodiment with the opening 11 closed can be swung in the opening direction by the water pressure from the upstream water flow, like the conventional flap gate. Therefore, it can be made to drain from the opening part 11 until the restoration, and the drainage does not overflow on the inside water side (upstream side).

According to the tsunami and storm surge flap gate 1 of the present embodiment as described above, the following effects can be achieved.
1. Since the opening part 11 of the sluice 10 can be kept in a fully open state at the normal time, it is possible to prevent drifting material from accumulating in the opening part 11.
2. When an earthquake of a predetermined seismic intensity or higher occurs, the door 3 can be automatically closed by the weight balance of the door 3 itself. Therefore, even if a tsunami occurs due to the earthquake, backflow can be prevented and damage can be suppressed. .
3. The pipe 64 can be opened at once by the electromagnetic valve 65 having a high operating speed.
4). Even if the electromagnetic valve 65 cannot be electrically controlled due to a power failure, the piping 64 can be opened by the urging force of the urging member 69 and the opening 11 can be automatically closed.
5. When the seismic detection means 5, the hydraulic control means 6, etc. cannot open the pipe 64 due to a failure or malfunction, or when a tsunami occurs due to an earthquake with a seismic intensity lower than the specified seismic intensity, or when a storm surge occurs regardless of whether there is an earthquake Even if it exists, according to the raise of the water level by a tsunami or a storm surge, the piping 64 can be automatically open | released and the opening part 11 can be closed automatically.

  The tsunami and storm surge flap gates according to the present invention are not limited to the embodiment described above, and can be changed as appropriate. For example, the weight arm 35 in the present embodiment also has a function as a torque arm, but a torque arm may be separately provided on the door body boss portion 33 or the door body support shaft 22.

  Further, in the present embodiment, the entire opening 11 is closed by arranging two large tsunami and storm surge flap gates 1 in the left and right horizontally elongated large openings. However, the present invention is not limited to this. Instead, the entire opening 11 may be closed by a single tsunami and storm surge flap gate 1 having a single rectangular door body 31 that can open and close the large opening. Good.

DESCRIPTION OF SYMBOLS 1 Tsunami and storm surge flap gate 2 Door body support means 3 Door body 4 Hydraulic cylinder 5 Seismic detection means 6 Hydraulic control means 7 Guide member 8 Engagement stopper 9 Piping path opening unit 10 Water gate 11 Opening part 21 Door body support unit 22 Door body support shaft 23 Bearing bracket 24 Spacer 25 Tip portion 26 Insertion hole 31 Door body body 32 Bearing 33 Door body boss portion 34 Support arm 35 Weight arm 36 Reinforcement frame 37 Door body float 38 Balance weight 41 Piston rod 42 Cylinder case 43 Piston part 44 Rod part 45 Front end side oil chamber 46 Rear end side oil chamber 47 Front end shaft 48 Guide roller 61 Hydraulic pump 62 Switching solenoid valve 63 Hydraulic oil tank 64 Pipe line 65 Solenoid valve 66 Valve opening / closing control device 67 Switching valve body 68 Valve body 69 Biasing member 70 Hydraulic unit Knit 71 Pilot check valve 91 Lever 92 Release valve 93 Float 94 Conduit pipe 95 Float pipe 96 Pulley 97 Weight

Claims (3)

A tsunami and storm surge flap gate that closes the sluice opening in the event of an earthquake to prevent backflow due to a tsunami,
A door provided with a weight arm supported swingably around a door support shaft provided above the opening and extended upward ;
A balance weight that is supported by the weight arm and adjusts the weight balance of the entire door body so that the door body closes or slightly opens the opening; and
A hydraulic cylinder that opens and closes the door body by engaging its tip with the weight arm ;
An earthquake detection means for detecting the occurrence of an earthquake of a predetermined seismic intensity or higher;
Hydraulic control means for controlling the hydraulic pressure of the hydraulic oil supplied to the hydraulic cylinder,
The hydraulic control means normally controls the contraction of the hydraulic cylinder and pulls the weight arm to the inside water side to hold the door body in a fully open state, and the earthquake detection means detects an earthquake having a predetermined seismic intensity or more. When detected, the piping for supplying the hydraulic oil to the hydraulic cylinder is automatically opened to release the hydraulic pressure applied to the hydraulic cylinder, and the door body is closed by the weight balance. High tide flap gate. The hydraulic control means includes an electromagnetic valve that opens and closes the piping, a valve opening / closing control device that controls opening and closing of the electromagnetic valve, and an urging member that urges the electromagnetic valve in an opening direction. During energization, the valve opening / closing control device holds the solenoid valve in a closed state, and when a power failure occurs, the holding force of the solenoid valve by the valve opening / closing control device is released and the energizing The tsunami and storm surge flap gates according to claim 1 , wherein the member opens the piping by opening the solenoid valve by an urging force in an opening direction.   At least three door body support units having the door body support shaft and bearing brackets for fixing both ends of the door body support shaft are provided, and the door body support shafts are arranged on the same axis. And
  The door body includes a door body main body capable of closing the opening of the sluice gate, and a plurality of door body bosses pivotally supported by the respective door body support shafts via slide bearings or rolling bearings. And a plurality of support arms that are fixed to each of the door body bosses and support the door body body, and the door body is multipointed by the plurality of door body support units. The tsunami and storm surge flap gate according to claim 1 or 2, which is supported.