JP6666381B2 - Water gate opening / closing device and its opening / closing control method - Google Patents

Description

  The present invention relates to a floodgate opening / closing device that opens and closes a floodgate and lowers a door body by its own weight, and a method of controlling the opening / closing of the floodgate opening / closing device.

  Conventionally, in order to open and close a water gate, usually, a motor is driven in an opening and closing direction to raise and lower a door body. However, due to a large-scale disaster, for example, a tsunami caused by a flood or an earthquake due to a storm surge, localized heavy rain, or the like, it is necessary to quickly close the floodgate by its own weight. Therefore, in order to quickly close the sluice, that is, to shorten the closing time of the sluice, many sluice gate opening / closing devices having a self-weight lowering function for lowering the door at a high speed by using the weight of the door are employed.

  In addition to this, in the conventional floodgate opening and closing device, an electric motor that raises and lowers the door body that opens and closes the floodgate, and a self-weight drop braking device that brakes the weight of the door body at a substantially constant speed when lowering the door body by its own weight, A water gate opening / closing device is adopted in which a pair of opening / closing device main bodies each having a. In this sluice gate opening / closing device, the opening / closing device main body is independently arranged as a pair on both sides in the width direction of the door body. In some cases, the direction may incline with respect to the width direction of the floodgate, and it is necessary to correct the inclination during the self-weight descent.

  As a conventional technique to cope with this, Patent Document 1 discloses that when the door body is lowered by its own weight, the door body is controlled to include its own weight drop due to the operation of the own weight descent braking device of each opening / closing device body, and the door body is lowered. When the width direction of the door body is inclined with respect to the width direction of the floodgate, turning on and off the electric motor of each opening / closing device body to correct the inclination posture while continuing the descent of the door body. An opening / closing control method is disclosed.

Japanese Patent No. 5936589

  However, in the opening / closing control method of the water gate opening / closing device according to the invention of Patent Document 1, when the width direction of the door body is inclined with respect to the width direction of the water gate during the descent of the weight of the door body, the electric motor of the pair of opening / closing device main bodies is used. By turning the rotation drive ON and OFF, the inclination posture of the door body is corrected. However, since the door body is descending at its own weight at a relatively high speed, the inclination posture is corrected smoothly (smoothly). It needed to be improved. Moreover, in the method of controlling the opening and closing of the water gate opening and closing device according to the invention of Patent Document 1, the motor cannot be driven when the three-phase power supply (power supply) is lost in a disaster or the like. When lowering the weight by the operation of the descent braking device, it is not possible to maintain the equilibrium state of the door body, in other words, if the width direction of the door body is inclined with respect to the width direction of the floodgate, correct the inclination posture Therefore, there is a possibility that a serious problem may occur when the door body falls by its own weight.

The present invention has been made in view of the above circumstances, and even when power to an electric motor is lost, a water gate opening / closing device capable of stably lowering a weight of a door body while maintaining its equilibrium state, and an opening / closing of the water gate opening / closing device It is an object to provide a control method.

(Aspect of the invention)
The aspects of the invention described below exemplify the configuration of the present invention, and are described separately in order to facilitate understanding of various configurations of the present invention. Each section does not limit the technical scope of the present invention, and, while taking into consideration the best mode for carrying out the invention, partially replaces, deletes, or deletes some of the components of each section. The components added with the above components are also included in the technical scope of the present invention.

(1) When opening and closing the water gate, a rotating shaft that rotates as the door body moves up and down, a differential device having an output shaft connected to the rotating shaft, and a first input shaft of the differential device. An electric motor, connected to a second input shaft of the differential device, wherein when the power to the electric motor is lost and the door body is lowered by its own weight, the rotation of the second input shaft accompanying the self-weight drop of the door body And a hydraulic braking device that controls the discharge amount of the hydraulic fluid generated by the control unit and adjusts the self-weight descent speed of the door body, and a pair of opening / closing device bodies independently disposed on both sides in the width direction of the door body. When the power to the electric motor is lost and the weight of the door body is falling, and the width direction of the door body is inclined with respect to the width direction of the water gate, the discharge amount of the hydraulic fluid in each of the hydraulic braking devices is reduced. A water gate opening and closing characterized by comprising a control device for controlling and correcting the inclination posture thereof Location (corresponding to the invention of claim 1).
In the water gate opening / closing device described in (1), when the door body is lowered by its own weight while adjusting the descent speed by the operation of each hydraulic braking device, the width direction of the door body is inclined with respect to the width direction of the water gate. In this case, by controlling the discharge amount of the hydraulic fluid in each hydraulic braking device by the control device, it is possible to correct the inclination posture of the door body while continuing to lower its own weight. As a result, even when the power to the motor is lost, it is possible to smoothly (smoothly) reduce the descent speed of the one end in the width direction of the door body, which has previously been lowered, and as a result, the door body The door body can be smoothly corrected from the inclined posture to the normal posture even during the self-weight descent at a high speed, and the responsiveness can be improved.

(2) In the sluice gate opening / closing device described in (1), the elevating means operates by a three-phase power supply, and the control device and the hydraulic braking device operate by a single-phase power supply or a DC power supply. A water gate opening / closing device (corresponding to the invention of claim 2).
In the gate opening / closing device described in the item (2), even when the three-phase power supply (power supply) is lost in a disaster or the like, the control device and the hydraulic braking device can be replaced by an uninterruptible power supply or a small portable generator. It can be operated using a phase power source or a battery DC power source. Thus, even if the three-phase power supply is lost, the door body can be stably lowered under its own weight without any trouble while maintaining its balanced state.

(3) The water gate opening and closing device according to the above mode (1) or (2), wherein the hydraulic braking device controls switching of an electromagnetic valve or opening of a flow control valve according to a signal from the control device. A gate opening / closing device characterized in that the discharge amount is controlled by performing the operation.
In the water gate opening / closing device described in the item (3), the flow rate of the hydraulic fluid can be smoothly controlled, and the door body can be smoothly corrected from the inclined posture to the normal posture.

(4) The water gate opening / closing device according to any one of the above modes (1) to (3), wherein the control device is provided as a pair with the main body of the switching device, and the respective control devices communicate with each other by wireless communication. A water gate opening / closing device that is connected.
In the floodgate opening / closing device described in the item (4), in the case of a large-scale disaster, a relatively long distance between the independent opening / closing device main bodies on both sides in the width direction of the door body, in other words, between a pair of gate posts. Inability to transmit signals due to, for example, disconnection of a cable to be routed can be suppressed.

(5) When opening and closing the water gate, a rotating shaft that rotates as the door body moves up and down, a differential device with an output shaft connected to the rotating shaft, and a first input shaft of the differential device. An electric motor, connected to a second input shaft of the differential device, wherein when the power to the electric motor is lost and the door body is lowered by its own weight, the rotation of the second input shaft accompanying the self-weight drop of the door body And a hydraulic braking device that controls the discharge amount of the hydraulic fluid generated by the control unit and adjusts the self-weight descent speed of the door body, and a pair of opening / closing device bodies independently disposed on both sides in the width direction of the door body. Opening / closing control method of a water gate opening / closing device, wherein when the power supply to the electric motor is lost and the door body is lowered by its own weight, the door body is adjusted by its own weight descent speed by the operation of each hydraulic braking device. It is lowered while, own weight descending of the door body power to the motor is lost During, when the width direction of the door body is inclined with respect to the width direction of the floodgate, by controlling the discharge amount of the hydraulic fluid in each of the hydraulic braking devices, while continuing to lower the weight of the door body, A method for controlling the opening and closing of a water gate opening and closing device, wherein the inclination posture is corrected (corresponding to the invention of claim 3).
In the opening / closing control method for the water gate opening / closing device described in the item (5), when the width direction of the door body is inclined with respect to the width direction of the water gate during the descent of the weight of the door body in a state where power to the electric motor is lost, Since the inclination posture is corrected by controlling the discharge amount of the hydraulic fluid in each hydraulic braking device, the door body is inclined even while the power to the electric motor is lost and the door body is falling at its own weight at high speed. In this case, the door body can be smoothly corrected from the inclined posture to the normal posture, and the response can be improved.

ADVANTAGE OF THE INVENTION According to the water gate opening / closing apparatus and its opening / closing control method of this invention , when a power supply to an electric motor is lost and a door body falls by its own weight, it can stably fall by its own weight, maintaining the equilibrium state.

Drawing 1 is a mimetic diagram of a floodgate opening and closing device concerning an embodiment of the present invention. FIG. 2 is a hydraulic circuit diagram of a hydraulic circuit unit of the hydraulic braking device employed in the water gate opening / closing device according to the embodiment of the present invention. FIG. 3 is a diagram showing a control flow of a control device employed in the water gate opening / closing device according to the embodiment of the present invention.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to FIGS.
As shown in FIG. 1, in a water gate opening / closing device 1 according to an embodiment of the present invention, a pair of opening / closing device main bodies 15, 15 described later are independently arranged on both sides in the width direction of the door body 3. In the floodgate opening / closing device 1 according to the present embodiment, when the floodgate 2 is quickly lowered by using the dead weight of the booth 3 in order to quickly close the floodgate 2 by the booth 3 at the time of disaster, When the width direction of the door body 3 is inclined with respect to the width direction of the floodgate 2, the inclination posture can be corrected while continuing the self-weight drop of the door body 3.

  Hereinafter, the water gate opening and closing device 1 according to the present embodiment will be described in detail. As shown in FIG. 1, a sluice gate opening / closing device 1 according to the present embodiment supports a door body 3 between a pair of left and right gate posts 5, 5 constituting a sluice 2 so as to be able to move up and down. A pair of right and left sheaves 6 and 6 are arranged on the upper part of the door body 3. Wire rope winding drums 7, 7 are arranged above a pair of left and right gate posts 5, 5, respectively. Independent wire ropes 10, 10 are wound around the sheaves 6, 6, respectively. One of the wire ropes 10 is wound around the corresponding sheave 6, one end of the wire rope 10 is locked on the upper end of one of the portal posts 10, and the other end is wound around the corresponding wire rope winding drum 7. I have. Similarly, the other wire rope 10 is wound around the corresponding sheave 6, one end of the wire rope 10 is locked to the upper end of the other portal 10, and the other end of the wire rope 10 is connected to the corresponding wire rope. It is wound around a winding drum 7.

  In the sluice gate opening and closing device 1 according to the present embodiment, as described above, the opening and closing device main bodies 15 and 15 are independently arranged in a pair on both sides in the width direction of the door body 3. The opening / closing device main body 15 has a rotating shaft 17 integrally connected to the corresponding wire rope winding drum 7, and a differential device 19 having an output shaft 18 for transmitting rotational torque between the rotating shaft 17 and the rotating shaft 17. An electric motor 23 connected to the first input shaft 21 of the differential 19; first brake means 25 for releasing or restricting the rotational movement of the first input shaft 21; A hydraulic brake device 27 (hydraulic brake device) that is connected to the shaft 22 and adjusts its own weight lowering speed when the door body 3 is lowered by its own weight, and a second brake means 26 that releases or restricts the second input shaft 22 An opening deviation meter 52 for detecting an inclination posture of the door body 2 with respect to the width direction of the floodgate 2, and a hydraulic oil in the hydraulic braking device 27 when the width direction of the door body 2 is inclined with respect to the width direction of the floodgate 2. To control the discharge amount of air and correct its inclination And that the control unit 55, a. Note that, in the present embodiment, the control devices 55, 55 of the switching device bodies 15, 15 are connected to each other by wireless communication. However, the invention is not limited thereto, and the control devices 55, 55 of the opening / closing device main bodies 15, 15 may be connected to each other by wired communication.

  A spur gear 17a is integrally connected to the rotating shaft 17. A spur gear 18a is also integrally connected to the output shaft 18 extending from the differential device 19. The spur gear 17a of the rotating shaft 17 and the spur gear 18a of the output shaft 18 mesh with each other, and the rotating shaft 17 and the output shaft 18 are configured to mutually transmit rotational torque. A motor 23 is connected to the first input shaft 21 of the differential device 19. The electric motor 23 is connected to the operation panel 56 for transmitting a signal from the operation panel 56. The electric motor 23 is driven by a three-phase power supply (power supply). The driving of the electric motor 23 rotates the first input shaft 21. The first input shaft 21 is provided with first brake means 25 between the differential 19 and the electric motor 23. The first brake means 25 is for restraining and releasing the rotational movement of the first input shaft 21. As the first brake means 25, a hydraulic lifting brake, an electromagnetic brake, a disk brake, or the like is employed. The first brake means 25 is operated by a three-phase power supply or a single-phase power supply. The first brake means 25 is connected to the operation panel 56 for transmitting a signal from the operation panel 56. The operation panel 56 operates with a single-phase power supply or a DC power supply.

  The second input shaft 22 of the differential 19 is connected to the hydraulic pump 30 of the hydraulic braking device 27. The second input shaft 22 is provided with second brake means 26 between the differential device 19 and the hydraulic braking device 27. The second brake means 26 is for restraining and releasing the rotational movement of the second input shaft 22. As the second brake means 26, similarly to the first brake means 25, a hydraulic lifting brake, an electromagnetic brake, a disk brake, or the like is employed. The second brake means 26 is operated by a single-phase power supply or a DC power supply. The second brake means 26 is connected to the control device 55 for transmitting a signal from the control device 55. In the present embodiment, the elevating means corresponds to the wire rope 10, the wire rope winding drum 7, the differential 19, and the electric motor 23. In the present embodiment, the wire rope 10 and the wire rope winding drum 7 are employed, but a chain and a sprocket may be employed. Further, in this embodiment, the electric motor 23 is employed as the elevating means, but a hydraulic motor or a hydraulic motor may be employed.

  As shown in FIG. 2, the hydraulic braking device 27 communicates with a hydraulic pump 30 and a suction path 34 and a discharge path 35 of the hydraulic pump 30 to adjust a discharge amount of hydraulic oil from the hydraulic pump 30. And a unit 31. The second input shaft 22 of the differential 19 is connected to the shaft of the hydraulic pump 30. For example, when the hydraulic pump 30 is a gear pump, the shaft is connected to one of a pair of gears (not shown) that mesh with each other in a gear case (not shown). The hydraulic circuit unit 31 receives the hydraulic oil discharged from the discharge path 35 of the hydraulic pump 30 in accordance with the rotational movement of the second input shaft 22, and the hydraulic oil is supplied to the pipeline 38 (the first and second flow control valves). 44, 45), the discharge amount is adjusted and returned to the oil tank 39, and the hydraulic oil from the oil tank 39 is sucked into the suction path 34 of the hydraulic pump 30 through the pipe 38. You. In the line 38 of the hydraulic circuit unit 31, a relief valve 42, an electromagnetic switching valve 43, first and second flow regulating valves 44 and 45 (including first and second check valves 46 and 47), a return filter 48 and a suction Filters 49 are arranged respectively. The relief valve 42 is opened when excessive hydraulic pressure is generated in the hydraulic pump 30, and releases the hydraulic pressure to the oil tank 39. The reference numeral is a stop valve 50. The hydraulic circuit unit 31 is connected to the control device 55 for transmitting a signal from the control device 55. The hydraulic circuit unit 31 operates with a single-phase power supply or a DC power supply. In this embodiment, the hydraulic pump 30 is employed as the hydraulic braking device 27, but a hydraulic motor or a hydraulic motor may be employed. Further, in the present embodiment, one electromagnetic switching valve 43 is provided, but a plurality of electromagnetic switching valves 43 may be provided. In the present embodiment, two flow control valves 44 and 45 are provided, but one or three or more flow control valves may be provided.

  The opening deviation meter 52 indicates that the open area of the floodgate 2 is deviated right or left, that is, the door body 3 is not maintained in an equilibrium state, and the width direction of the door body 3 is in the width direction of the floodgate 2. This is to detect a state of inclination. The opening deviation meter 52 is connected to the corresponding control device 55 for signal transmission to the corresponding control device 55. The opening deviation meter 52 and the control device 55 are connected by wire communication. Then, the opening deviation meter 52 measures the phase of the rotating shaft 17 of the switching device main body 15 and transmits the measurement result to the corresponding control device 55. The controller 55 calculates the phase difference between the rotating shafts 17 based on the shared phases of the rotating shafts 17 of the switchgear bodies 15, 15. Calculate the tilt posture. The opening deviation meter 52 is operated by a single-phase power supply or a DC power supply. Although substantially the same, the difference between the rotation speeds of the rotation shafts 17 of the switchgear bodies 15 may be measured to calculate the inclination posture of the door 3. The control device 55 controls the lowering operation of the door 3 when the door 3 is lowered by its own weight. As described above, the control devices 55 are connected to each other by wireless communication. The control device 55 is connected to an operation panel 56 for signal transmission. The control device 55 is operated by a single-phase power supply or a DC power supply. The detailed control flow of the control device 55 will be described below.

Next, an opening / closing control method using the sluice gate opening / closing device 1 according to the present embodiment will be described based on FIG. 3 and also with reference to FIGS. 1 and 2 as needed. The opening / closing control method when the door body 3 is lowered by its own weight when it is lost will be described in detail.
In a state where the three-phase power is lost, the electric motor 23 does not function, and in the hydraulic circuit unit 31 of each switching device main body 15, the electromagnetic switching valve 43 is always open. Note that even when the three-phase power supply is lost, the operation panel 56, the control device 55, the second brake means 26, the hydraulic braking device 27 (the hydraulic circuit unit 31), and the opening deviation meter 52 are connected to the uninterruptible power supply or the small-sized It can be operated from a single-phase power source of a portable generator or a DC power source of a battery.

  In step S <b> 1, the operator performs a switch operation or the like for lowering the door body 3 by its own weight on the operation panel 56. Then, this signal is transmitted to the control devices 55, 55 of the opening / closing device main bodies 15, 15, and the self-weight drop of the door body 3 is started. Subsequently, in step S2, the second brake means 26 of each switching device main body 15 is released by a signal from the control device 55 of each switching device main body 15, and the rotational motion of the second input shaft 22 is released. On the other hand, the first input shaft 21 cannot rotate because the motor 23 does not function due to the loss of power. Then, in step S3, the door body 3 descends by its own weight at an appropriate descending speed by the action of each hydraulic braking device 27. That is, in step S <b> 3, the rotating shaft 17 of each opening / closing device main body 15 rotates and the second input shaft 22 of the differential 19 rotates with the lowering of the weight of the door body 3. Hydraulic oil discharged from the hydraulic pump 30 of the hydraulic braking device 27 along with the rotational movement of the second input shaft 22 passes through the first and second flow control valves 44 and 45 of the hydraulic circuit unit 31 to an oil tank. Return to 39. When the hydraulic oil passes through the first and second flow control valves 44 and 45, the discharge amount from the hydraulic pump 30 is controlled, and the lowering speed of the door 3 is suppressed to an appropriate speed. I am trying to descend. In addition, when increasing or decreasing the closing speed of the floodgate 2, that is, increasing or decreasing the descending speed of the door body 3, the opening degree of the first and second flow control valves 44 and 45 is controlled by a signal from the control device 55. By doing so, the descending speed of the door body 3 can be increased or decreased. In addition, during the descent of the door body 3 by its own weight, the opening speed of the first and second flow control valves 44 and 45 is controlled by the height of the door body 3 from the landing surface, so that the descent speed is appropriately changed. You can also.

  When the door body 3 is descending under its own weight at an appropriate descent speed by the action of each hydraulic braking device 27, the opening shaft deviation meters 52, 52 always use the rotating shafts 17, 17 of the opening / closing device bodies 15, 15 at all times. Each phase is measured, the measurement result is transmitted to each of the control devices 55 and 55, and the measurement result is shared by the control devices 55 and 55. Subsequently, in step S4, when the controller 55 determines that the phase difference between the rotating shafts 17, 17 of the switchgear main bodies 15, 15 based on the measurement results from the opening degree deviation meters 52 exceeds the reference value. It is determined that the inclination correction of the door 3 is necessary, and the process proceeds to step S5. On the other hand, in step S4, when the controller 55 determines that the phase difference between the rotating shafts 17, 17 of the switchgear bodies 15, 15 based on the measurement results from the opening degree deviation meters 52 does not exceed the reference value. It is determined that the inclination correction of the door 3 is not necessary, and the process proceeds to step S9. In step S9, the door 3 is landed. Subsequently, in step S10, when the landing of the door body 3 is detected by a detection sensor (not shown), the second brake means 26 of each of the opening / closing device main bodies 15 is received by a signal from the control device 55 of each of the opening / closing device main bodies 15. Is operated to restrict the rotational movement of the second input shaft 22. Then, in step S11, the self-weight drop of the door body 3 is completed.

  In step S5, the electromagnetic switching valve 43 of the hydraulic circuit unit 31 is closed in response to a signal from the control device 55 of the opening / closing device main body 15 connected to one end of the door body 3 that has been previously lowered in the width direction. By operating, the flow of the hydraulic oil to the first flow control valve 44 is shut off. As a result, the discharge amount discharged from the hydraulic pump 30 decreases, and in step S6, the descending speed of the one end in the width direction of the door body 3 that has descended earlier decreases. Subsequently, in step S7, the control device 55 determines whether or not the inclination correction of the door 3 has been completed based on the measurement result from each of the opening deviation meters 52. As a result, in step S7, when the control device 55 determines that the inclination posture of the door body 3 has not been corrected, the process returns to the step before step S7. On the other hand, if it is determined in step S7 that the inclination posture of the door body 3 has been corrected by the control device 55, the process proceeds to step S8. Subsequently, in step S8, the electromagnetic switching valve 43 of the hydraulic circuit unit 31 is again activated by a signal from the control device 55 of the opening / closing device main body 15 connected to one end in the width direction of the door body 3 that has been lowered earlier. By operating in the open state, the flow of the operating oil to the first and second flow control valves 44 and 45 is restarted. As a result, the discharge amount discharged from the hydraulic pump 30 increases, so that the door body 3 continues its own weight drop again at an appropriate descent speed. Thereafter, the process returns to the step before step S4.

In step S5, the first and second hydraulic circuit units 31 are controlled by a signal from the control device 55 of the opening / closing device main body 15 that is connected to one end of the door body 3 that is previously lowered in the width direction. The opening degree of the flow control valves 44 and 45 is reduced (the electromagnetic switching valve 43 is kept open) to reduce the discharge amount discharged from the hydraulic pump 30, and in step S6, the door body 3 The lowering speed of the one end in the width direction can be suppressed. In addition, an electromagnetic switching valve 43 (not shown) is also arranged upstream of the second flow control valve 45 (on the side of the hydraulic pump 30), and in step S5, the door 3 is moved down first. The two electromagnetic switching valves 43, 43 of the hydraulic circuit unit 31 are operated in a closed state by a signal from the control device 55 of the opening / closing device main body 15 connected to one end portion in the width direction, and the first and second flow rate adjustments are performed. The flow of the hydraulic oil to both the valves 44 and 45 is shut off, and the discharge amount discharged from the hydraulic pump 30 is reduced to substantially zero. It is also possible to stop the weight drop of the part. Further, in step S5, the second brake means 26 is operated by a signal from the control device 55 of the opening / closing device main body 15 connected to one of the widthwise ends of the door body 3 which has been previously lowered. The rotational movement of the second input shaft 22 is restrained and the discharge amount discharged from the hydraulic pump 30 is reduced to substantially zero. May be stopped.
The switching of the electromagnetic switching valve 43 and the degree of opening of the first and second flow control valves 44 and 45 for controlling the discharge amount from the hydraulic pump 30 are controlled by the degree of inclination of the door 2. It can be appropriately selected according to conditions such as (size) and time required for tilt correction.

  By the way, in the water gate opening / closing device 1 according to the present embodiment, when the water gate 2 is normally opened and closed, the signal from the operation panel 56 releases the first brake means 25 and only the rotational movement of the first input shaft 21. To release. The door 3 is moved up and down by driving each electric motor 23 in the opening and closing direction according to a signal from the operation panel 56. Further, when the door body 3 is moved up and down, the control device 55 determines that the width direction of the door body 3 is inclined with respect to the width direction of the floodgate 2 based on the measurement result from each opening degree deviation meter 52. In this case, the electric motor 23 of the opening / closing device main body 15 connected to one end in the width direction of the door body 3 that has been previously moved up and down is turned on / off by a signal from the operation panel 56, and the door body 3 Is corrected for inclination. Further, when the door 3 is lowered by its own weight in a state where the three-phase power supply can be used, the motors 23 of the respective opening / closing device bodies 15 may be driven in the closing direction to assist the own weight drop.

  As described above, in the water gate opening / closing device 1 according to the embodiment of the present invention, when the door body 3 is lowered by its own weight, each control device 55 When it is determined that the width direction of the door body 3 is inclined with respect to the width direction of the floodgate 2, the hydraulic oil is discharged from the hydraulic pump 30 of each hydraulic braking device 27 by a signal from each control device 55. By controlling the amount, the inclination posture of the door body 3 can be corrected while continuing to descend its own weight. This makes it possible to smoothly reduce the descent speed of the one end in the width direction of the door body 3 that has been descending earlier, so that the door body 3 that is descending at its own weight at a relatively high speed can be normally moved from its inclined posture. The posture can be corrected smoothly.

  Further, in the water gate opening / closing device 1 according to the embodiment of the present invention, the control device 55, the second brake means 26, and the hydraulic braking device 27, other than the electric motor 23 of each switching device main body 15, are operated by a single-phase power supply or a DC power supply. Therefore, even when the three-phase power supply is lost, such as during a disaster, the door 3 is maintained in an equilibrium state by using an uninterruptible power supply, a single-phase power supply of a small portable generator, or a DC power supply of a battery. It is possible to stably drop its own weight.

  Further, a relatively long distance between the control devices 55, 55 of the independent opening / closing device main bodies 15, 15 on each side of the door body 3 in the width direction, in other words, a relatively long distance between the pair of gate posts 5, 5 is connected by wire communication. In some cases, when a large-scale disaster occurs, the cable may be disconnected. In order to take measures against this, in the floodgate switchgear 1, the control devices 55, 55 of the switchgear main bodies 15, 15 are connected to each other by wireless communication so as to suppress signal transmission failure due to disconnection of the cable. I have to.

  In this embodiment, the hydraulic braking device 27 is employed as the hydraulic braking device, but a hydraulic braking device may be employed. In this embodiment, the hydraulic braking device includes a hydraulic pump and a hydraulic circuit unit that communicates with a suction path and a discharge path of the hydraulic pump to adjust a discharge amount of water from the hydraulic pump.

  DESCRIPTION OF SYMBOLS 1 Sluice gate opening / closing device, 2 Sluice gate, 3 door body, 7 Wire winding drum (elevating means), 10 Wire rope (elevating means), 15 Switch body, 23 Motor (elevating means), 27 Hydraulic braking device (hydraulic braking) Device), 55 control device

Claims (3)

When opening and closing the water gate, a rotating shaft that rotates as the door body moves up and down,
A differential device having an output shaft connected to the rotating shaft;
An electric motor coupled to a first input shaft of the differential;
When the power to the electric motor is lost and the door body is lowered by its own weight, an operation caused by the rotation of the second input shaft accompanying the self-weight drop of the door body is connected to the second input shaft of the differential device. A hydraulic braking device that controls a discharge amount of liquid and adjusts a speed of descent of the weight of the door body,
, A pair of switchgear bodies each independently disposed on both sides in the width direction of the door body,
If the width of the door is inclined with respect to the width of the floodgate during the descent of the weight of the door due to loss of power to the electric motor, the discharge amount of the hydraulic fluid in each of the hydraulic braking devices is controlled. And a control device for correcting the inclination posture. The motor is operated by a three-phase power supply,
The water gate opening and closing device according to claim 1, wherein the control device and the hydraulic braking device are operated by a single-phase power supply or a DC power supply. When opening and closing the water gate, a rotating shaft that rotates as the door body moves up and down,
A differential device having an output shaft connected to the rotating shaft;
An electric motor coupled to a first input shaft of the differential;
When the power to the electric motor is lost and the door body is lowered by its own weight, an operation caused by the rotation of the second input shaft accompanying the self-weight drop of the door body is connected to the second input shaft of the differential device. A hydraulic braking device that controls a discharge amount of liquid and adjusts a speed of descent of the weight of the door body,
The opening and closing device body provided with, a method of controlling the opening and closing of the water gate opening and closing device, a pair independently arranged on both sides in the width direction of the door body,
When the power to the electric motor is lost and the door body is lowered by its own weight, the door body is lowered while adjusting its own weight lowering speed by the operation of each of the hydraulic braking devices,
If the width of the door is inclined with respect to the width of the floodgate during the descent of the weight of the door due to loss of power to the electric motor, the discharge amount of the hydraulic fluid in each of the hydraulic braking devices is controlled. A method of controlling the opening and closing of the water gate opening and closing device, wherein the inclination posture is corrected while continuing to lower the weight of the door body.

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