JPS6057754B2 - gate control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dam control device for controlling a gate of a dam, and particularly to a dam control device having a backup function when controlling a dam by remote control.

Currently, many dams across Japan (including estuary weirs) have installed automatic gate control devices that include hardware, computers, and software for the purpose of automating gate control and saving labor.

The automatic gate control device is usually installed at the dam management office and uses constant water level control to keep the dam water level constant during normal times, and various control methods during floods (pre-discharge control, pre-discharge control, constant water level control, constant ratio control, etc.) Complex flood control is being carried out by combining the following: An automatic gate control device was installed, and a method was introduced to automatically control the gate remotely from the dam management center. Operators no longer have to operate the gate manually from the dam site panel as before, but can now control the gate at the dam management center. The ability to monitor and control gates has led to labor savings in dam management and operation, but on the other hand, various problems have arisen in terms of dam safety.

It goes without saying that safety measures must be taken downstream when opening the gates and releasing water stored in the dam. In other words, before the start of water discharge, it is mandatory to sound a siren warning downstream of the start of water discharge to evacuate people downstream from the riverbed. In order to prevent the water from rising, restrictions on the increase in the discharge amount are stipulated in Article 11 of the gate operation regulations.
The automatic gate control device controls the discharge according to these regulations, and the operator monitors this. If these procedural regulations are violated and an excessively large amount of water is accidentally released at an unexpected time, an artificial flood will occur, resulting in an accident that will result in loss of life and property downstream.

In other words, dam safety means preventing erroneous gate releases.
A conventional dam control device is constructed as shown in FIG. Operator 10 monitoring gate 2 of dam 1 in FIG.
is located at the dam management center 7 (this management center can be functionally defined as a management control device), monitors the contents displayed on the operation console 8, and performs gate control. Normally, the automatic operation signal from the computer 9 is transmitted through the communication cable 6 to the machine side panel 4 of the machine side control room 3 (this machine side control room can be functionally defined as machine side equipment) and from there to the gate. Normal rotation, reverse rotation, and stop signals of the motor 5 are output, and the gate 2 is controlled to open and close. As shown in Fig. 2, the function assignment of each device and the switching method of the control location are such that the automatic operation signal 17 from the computer 9 automatically selects the manual automatic cutoff βWl5, and the machine side far cutter 1fXS.
It becomes effective only when W13 is selected far away. If the computer is down, automatic manual cutting Wl5 is selected to manual, and manual control is switched to manual control from the console 8 via manual steering SWl6, resulting in remote manual control based on the operator's judgment. When the machine-side remote cutting βWl3 is selected on the machine side, the control on the dam management center side is disconnected and the machine side manual control is performed from the machine side panel 4. In other words, the configuration is such that the machine-side manual control closest to the gate is given the highest priority. A specific control sequence is shown in FIG. 3 (however, parts unnecessary for explanation are omitted). Third
First, let's explain the gate opening/closing operation section using the diagram. The gate 2 is hoisted onto a hoisting drum 11 via a wire lobe 12, and the hoisting drum 11 is connected to a gate motor 5, and the rotation of the gate motor 5 rotates the hoisting drum 11. Depending on the direction of rotation, the gate 2 Controlled by rising (open) and falling (closed).

When the gate motor 5 is open, the main contact 2 of the magnetic relay 25
7 or the main contact 28 of the closed magnet relay 26 for forward and reverse rotation. The power of the gate motor is supplied from the gate power supply 18 via the gate power supply FFB19 (FFB is an abbreviation for F.use ■ Ree Dan Raker).
. Next, let's explain the gate opening/closing control section.

When the machine side far switch μSWl3 is selected on the machine side, the open magnet relay 25 and the close magnet relay 26 operate by operating the open command SW2l and close command SW22 on the machine side panel, and the machine side far switch SWl3 If the remote location is selected, the remote open/close signal reception relays 30, 31 operated by the contacts 23 and 24 powered by the power source 29 actuate. These contacts 21, 22, 23, and 24 are powered by the gate power supply 18 via the operating circuit FFB2O. Remote opening/closing commands from the dam management center are sent via open relay 38,
Contacts 40 and 41 of the close relay 39 output an open command and a close command to the machine side panel. Open relay 38 and close relay 39 are operated by operating open command switch 3 and close command switch 35 when manual automatic switching SWl5 is selected as manual, and manual automatic switching SWl5 is selected as automatic. If so, the automatic open signal 36 and automatic close signal 3 from the computer 9
It operates according to the instructions in 7. A lock circuit 33 is added to this operation circuit to lock the operation under control conditions or abnormal conditions. The status of the machine side panel is outputted on the display unit 32, and a display alarm circuit 42 issues a display warning on the dam management station side. These power sources on the dam management center side are supplied from a control device power source 43. The conventional gate control malfunction prevention and safety measures will be explained with reference to the block diagram shown in FIG.

The conventional system shown in FIG. 4 detects the following three functions only by the automatic control device. 1. Control congestion detection 2. Vortex movement detection 3. Gate operation alarm First, the control congestion detection function monitors the response of the automatic control device and machine side panel. No response to the signal (gate unresponsive) No response to the closing signal from the machine side panel to the close command (gate unresponsive) C No response to the closing signal from the machine side panel to the open command There was a response (reverse gate running) 2. There was an open signal from the machine side panel in response to the closing command (gate running backwards) E. There was a response from the machine side panel even though there was no opening/closing command. Opening,
There was a closing signal.

(Gate self-propelled) The time during which the situations a) to e) continue is measured by a timer, and when a certain period of time (usually about 5 seconds) has elapsed, it is detected as a controlled jam, and the alarm and control are locked.

In the figure, the control traffic jam timer 50 is located at the control location and at the remote contact point 47.
, an open command contact 40, a close command contact 41, an open contact 48,
The timer starts counting when the condition of the closed contact 49 is satisfied.

When the above conditions a) to e) are reached, the conditions are met, and when this condition passes for more than the time set in the timer 50, the time is up, the control traffic jam timer contact 58 is activated, and the alarm lock circuit 60 causes an alarm to be displayed. , a control lock is taken.
Next, the vortex movement detection function detects vortex movement when the opening and closing signals from the machine side panel continue for a certain period of time (excessive gate movement) in response to opening/closing commands from the automatic control device.
Lock alarms and controls.

In the figure, the vortex action timer 51 counts while the remote contact 47 is working and the open contact 48 or the closed contact 49 is working, and when a set time has elapsed, the time is up and the vortex action timer The contact 59 operates, and the alarm lock circuit 60 displays an alarm and locks the control.

The gate operating alarm is displayed as a warning that the gate is operating while the automatic control device continues to receive the open or closed signal from the machine side panel.

In the figure, an open signal 45 and a close signal 46 from the machine side panel are received by an open receiving relay 53 and a closing receiving relay 54, and the receiving relays have an open contact 48 and a closed contact 49. ,
An open indicator lamp 56 and an open indicator lamp 57 indicate that the gate is in operation, and regardless of whether the open contact 48 or the close contact 49 is operated, a chime 55 is sounded to indicate that the gate is in operation. As mentioned above, as a safety measure to prevent gate malfunction, conventional gate control devices have a control jam detection system that detects when the control command does not correspond to the actual gate movement, and a control system that detects when the amount of one gate operation exceeds a specified value. It was equipped with three functions: vortex motion detection to detect when the gate is operating, and gate operating alarm to notify the operator that the gate is operating.

However, from a dam safety perspective, it has been discovered that there are dangerous cases that cannot be covered by conventional automatic control systems alone. That is, if an accident occurs in which the cable core wire is short-circuited at point The state is the same as when an open command is detected.

At this time, in the gate control device, the three detection circuits mentioned above operate and display an alarm, but even if the control command of the gate control device can be locked, the opening/closing command of the machine side panel cannot be locked, and the gate is self-propelled. Resulting in.

Cases in which the core wires of interconnecting cables are shorted can occur due to cable breaks during construction, short circuits, or even when small animals (rats, etc.) eat through the breach. 2 As in case 1) above, connect the cable lead-in terminal (gate control device, machine side panel)
A short circuit between the terminals due to a falling metal piece is also considered, and the control cannot be locked as in 1.

3 When the gate control device accidentally closes the open command contact during inspection.

In this case, the power to the gate control device was cut off because it was being inspected, and the three detection circuits mentioned above were not working, making it impossible to notify the operator of the abnormality, and the dam management office was completely unaware of the gate's movement. The gate will move on its own and there is a risk of flooding downstream.

Even if the gate control device is stopped in this way, even if an unexpected accident occurs in the control circuit including the communication cable, the gate will open and abnormal water will be discharged downstream.

The present invention aims to eliminate the above-mentioned erroneous discharge from the gate of the dam control device, and its main purpose is to add a backup function in addition to the conventional function to ensure thorough monitoring and control of erroneous discharge. A dam control device is provided. The gist of the present invention is, in order to achieve the above object, to provide a line for backup, that is, for monitoring erroneous gate discharge, between a management control device and a machine side device, and to provide a line between a management control device and a device on the machine side and a line for monitoring erroneous gate discharge. I am trying to perform backup by adding an element that can back up to the control device.

The term "backup" is used in a broader sense in the present invention. That is, in addition to monitoring, it also includes providing a certain degree of control function to the device side. In the present invention, four functions are added. Optimum backup is possible if all of these four functions are satisfied, but it goes without saying that each of them can perform an effective function independently. The four functions are: power is not always required in the machine side control room, gate operation alarms and emergency operations can be performed while being disconnected from the control center, and emergency control is provided directly to the machine side room by the operator. In order to enable operation, and to perform a self-propulsion check function in case of erroneous gate operation, a control means is provided in the side compartment of the machine.

Hereinafter, aspects of the present invention will be explained in detail. The main purpose of dams is to store water for effective use of water resources, and surplus water is released through the gates throughout the year during the snowmelt, rainy season, and typhoon seasons, and the gates are moved during other periods of drought. It is rare for water to be released, and the gate is not operated (fully closed) for 80-90% of the year.

However, the gate is currently kept powered on at all times so that it can be moved at any time (the gate motor power switch is located on the machine side panel).

The gate power supply FFB19 and the operation circuit FFB2O shown in the current gate control sequence shown in FIG. 3 are always turned on and ready to be controlled at any time.

In other words, if the above-mentioned malfunction occurs in the equipment or cables during the period when the gates are not operated for 80 to 90% of the year, it means that even if the gates are opened, it is not the right time to release water, and the discovery of the accident will be delayed, leading to abnormal releases.

The first point of interest of the present invention is this point, and the gate electric power
Bl9 is equipped with a remote control switch for gate power so that it can be turned off during dry periods and used only when releasing water.

Next, the drawback of the conventional method in terms of detecting and dealing with erroneous discharge is that it cannot function while the gate control device is stopped or malfunctions.

Regarding this point, the second point of interest of the present invention is that a gate operation alarm circuit and a gate emergency operation circuit are provided in completely separate systems separated from the gate control device.

In other words, it was used as a backup system when the gate control equipment was stopped. That is, the gate operation alarm circuit does not have an interface with the gate control device, the input signal is taken directly from the contact point on the machine side panel, and the power is supplied directly from the gate power supply.

By adopting such a system, warnings regarding gate operation can be issued completely independently of the status of the gate control device at the dam management center. Therefore, even while the conventional gate control device is stopped, it has become possible to function as a gate operation alarm device. The third point of interest is the gate emergency operation circuit, which is used to perform emergency gate operation when the operator determines that the gate operation is an erroneous discharge when the gate operation is alarmed. This gate emergency operation circuit does not exist in conventional systems and has been newly devised, but causes of incorrect gate discharge include the aforementioned cable short circuit, terminal block short circuit, gate control device stoppage, or abnormality. In such cases, there was previously no means to stop the gate within the dam management office. In situations like this up until now, the operator would go from inside the dam control center to the machine side panel several hundred TrL away, and then perform the gate stop operation or
It was as if the gate power supply had been turned off.

By equipping this gate emergency operation circuit, even if the gate control device goes down, an operator from the dam management office can perform emergency gate operations, and after an abnormality is discovered.
(Quick measures are now possible.) The fourth feature of the present invention is that when the gate moves by itself due to the operation, the vortex motion detection circuit described in the conventional method is also provided on the side panel, and the gate is The point is that an interlock is established in which the amount of z-opening operation allowed is limited in one operation, and no more openings are allowed at one time.

By providing the vortex motion detection circuit on the side panel of the machine, damage caused by erroneous discharge can be minimized as a final stage backup even when the gate control device is stopped. Embodiments of the present invention are shown in FIGS. 5 and 6''-1
Gate power supply remote control circuit (first point of interest) As shown in FIG. 5, a new gate erroneous discharge protection device 71 is installed in the dam management station 7.

A remote control type FF is installed on the gate electric wire FBl9 in this device 71.
Using B, input FFB to the dam management office SW64, FFBV
fTSW65 is provided. FFB input switch 64, FFB disconnection switch via newly laid cable 72 from the dam management office
Use W65 to turn on and off the gate electric wetting switch FB19.

As a result, during the dry season, which lasts 80 to 90% of the year, the gate power supply FFB19 is turned off to prevent erroneous discharge. 2-gate operation alarm circuit (second point of interest) Shown in Figure 6.

The difference from the conventional method is that the circuit power supply is protected by a protection device, Electrical Code FB73.
The alarm is formed by the gate power source 18 supplied from the gate, is separated from the gate control device, and uses the alarm display method shown in Table 1. Note that power is supplied via a power transformer 78. Open magnet relay auxiliary contact 7 from machine side panel
The male-closed magnet relay auxiliary contact 75, the fully closed limit contact 76, and the specified opening limit contact 77 are connected to the protective device cable 7.
2, the open reception relay 79 and the closed reception relay 80
, the fully closed receiving relay 81 and the specified opening receiving relay 82, and the contacts of these relays, that is, the open contact 83, the closed contact 84, the fully closed contact 85, and the specified opening contact 86, are shown in Table 1. This will display an alarm indicating that the That is, this is the most important warning for the operator. The buzzer 89 (88 is a buzzer sounding relay) alerts when the gate starts discharging water and when the gate passes the limit SW point set at a certain opening degree in the opening direction. The system is designed to distinguish important alarms for gate operation and call the operator's attention by pressing the stop button 87) and issuing an alarm using a chime 90 when the gate is open or closed. In addition, an indicator lamp 91 is displayed when it is open or closed.
, 92 lights up. 3-gate emergency operation circuit (third point of interest) This circuit is not present in the conventional system and is newly provided in the present invention.

In Figure 5, emergency operation input f) W66 and emergency operation W67
Alternatively, gate opening/closing control can be performed by operating the emergency operation close SW.

Considering the psychological state of the operator in an emergency, this circuit has been designed to be the simplest to operate, excluding all interlocks.

4-gate vortex motion detection circuit (fourth point of interest) In FIG. 5, it is composed of a vortex motion timer 61 and a vortex motion detection relay 62.

The vortex action timer 61 counts the working time of the open magnet relay 25 or the closed magnet relay 26,
If the time continues longer than the time set on the timer, the timer will start. The time is up and the vortex action timer contact 63 is activated. When this is activated, the vortex motion detection relay 62 is activated, self-holding, and locking the remote control circuit.

At the same time, an alarm is displayed in the vortex action alarm circuit 70 on the dam management center side via the protection device cable 72. After the operator confirms and investigates, the dam management office issues the vortex operation reset SW69.
The self-holding circuit is reset by operating .

As mentioned above, this circuit serves as the final backup as hardware, and minimizes damage in the event of erroneous discharge. As described above, all of the four circuits according to the present invention are housed in the gate erroneous discharge protection device 71, and the protection device cable 72 for communication with the machine side panel is different from the conventional gate control communication cable 6 in that it is a cable laid. The cables, cables, or ducts are completely separated and installed to prevent damage to each cable.

According to the present invention described above, complete backup against gate erroneous discharge has become possible by simply adding a new line and associated functions to the conventional dam control device.

It should be noted that if all four functions are added, a complete backup system will be provided, but it goes without saying that even if each of the four functions is added individually, effects corresponding to each function can be exerted.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the overall configuration of a dam control device, FIGS. 2, 3, and 4 are detailed diagrams thereof, and FIGS. 5 and 6 are diagrams showing an embodiment of the present invention. 2...Gate, 3...Machine side control room, 7
... Dam management office, 18 ... Gate power supply, 72 ... Track for monitoring incorrect gate discharge.

Claims (1)

[Scope of Claims] 1. A machine-side device that is provided on the gate side, has its own gate power source, and is configured to open and close the gate based on the gate power source, and is separate from the machine-side device. Management control configured to be connected to the machine side equipment at a location via a line provided between the machine side equipment, to have its own power source different from the above power supply, and to control and monitor the above machine side equipment via the above line. In addition, a line for monitoring erroneous gate discharge, which is different from the above line, is provided between the machine-side device and the management control device, and based on the line, the management control device and the machine-side device can communicate with each other. A gate control device that is equipped with a function that can monitor and control erroneous gate discharge to back up control and monitoring on the machine side device side. 2. An aircraft-side device installed on the gate side, which has its own gate power source and is configured to open and close the gate based on the gate power source, and an aircraft-side device located at a separate location from the aircraft-side device. a management control device that is connected to the device via a line provided between the two, has its own power source different from the power source, and is configured to control and monitor the machine-side device via the line; A line for monitoring erroneous gate discharge, which is different from the above line, is provided between the machine side device and the management control device, and the gate power supply installed to open and close the gate on the machine side device is connected to the gate when the gate is opened/closed. At the time of execution, it is disconnected from the gate opening/closing operation unit that shuts off or opens/closes the gate based on the commands from the management control device through the line for monitoring erroneous gate discharge, and when executing the gate opening/closing operation, it is disconnected based on the commands from the management control device. A gate control device connected to the input or gate opening/closing operation section. 3. An aircraft-side device installed on the gate side, which has its own gate power source and is configured to open and close the gate based on the gate power source, and an aircraft-side device located at a separate location from the above-mentioned aircraft side device. a management control device that is connected to the device via a line provided between the two, has its own power source different from the power source, and is configured to control and monitor the machine-side device via the line; A line for gate erroneous discharge monitoring, which is different from the above line, is provided between the machine side device and the management control device, and a line is provided on the management control device side via the line for gate erroneous discharge monitoring, and the gate power supply is used as a power source, and in the event of an emergency operation, the gate opening/closing control unit on the machine side device side, that is, the gate opening/closing control is performed based on the gate power supply provided to open and close the gate on the machine side device side by control operation to the gate opening/closing operation unit. A gate control device that is equipped with an emergency switch to perform emergency operations and emergency opening/closing operations for a gate opening/closing control section provided on the side of the machine. 4. An aircraft-side device installed on the gate side, which has its own gate power source and is configured to open and close the gate based on the gate power source, and an aircraft-side device located at a separate location from the above-mentioned aircraft side device. a management control device that is connected to the device via a line provided between the two, has its own power source different from the power source, and is configured to control and monitor the machine-side device via the line; First and second lines for gate erroneous discharge monitoring, which are different from the above lines, are provided between the machine side device and the management control device, and the gate power supply installed to open and close the gate on the machine side device side. Gate opening/closing control is performed based on the control operation of the gate opening/closing operation unit.The opening/closing control status of the gate opening/closing control unit provided on the machine side device is detected by the overoperation detection unit provided on the machine side device. and displaying the over-operation detection result on a display section provided on the management device side through the first line for monitoring erroneous gate discharge, and managing it through the second line for monitoring erroneous gate discharge. A gate control device in which the over-operation is reset by a reset switch provided on the control device side. 5. An aircraft-side device installed on the gate side, which has its own gate power source and is configured to open and close the gate based on the gate power source, and an aircraft-side device located at a separate location from the above-mentioned aircraft side device. a management control device that is connected to the device via a line provided between the two, has its own power source different from the power source, and is configured to control and monitor the machine-side device via the line; First and second lines for monitoring gate erroneous discharge, which are different from the above-mentioned lines, are provided between the machine side equipment and the management control equipment, and the machine side equipment side is used to monitor the discharge start, passing the specified opening, opening, and closing. A state detection unit is provided inside, and a detection signal from the state detection unit is sent to the management control device through the first line, and the gate power supply of the machine side equipment is supplied to the management control unit through the second line. In response to the state detection signal of the state detection unit that is applied as its own power source and sent through the first line, the discharge starts, the specified opening is passed,
A gate control device is provided with a display section that displays an open state and a closed state, respectively.