JP7286509B2 - Pump facility, diagnostic device for pump facility, monitoring control device, supervisory control method, supervisory control program, diagnostic method for pump facility, diagnostic program for pump facility - Google Patents

Description

The present invention relates to a pump facility, a diagnostic device for pump facility, a monitoring control device, a supervisory control method, a supervisory control program, a diagnostic method for pump facility, and a diagnostic program for pump facility.

Conventionally, in pump equipment used for flood control, an internal combustion engine such as a diesel engine is often used as a driving machine for the main pump, and a large engine with an output of several thousand kW may be used.

Pump equipment that uses such an internal combustion engine is equipped with many auxiliary equipment such as fuel equipment and cooling water equipment, and small pipes. may malfunction and malfunction.

If the equipment is damaged due to failure, a long recovery period is required and high costs are incurred. In addition, since the pump cannot be operated during the restoration period, it will lead to the loss of functions as a social infrastructure. For this reason, just before or immediately after an earthquake, etc., install seismometers and receive disaster information such as J-Alert so that these devices can be stopped safely (before they break down). Techniques for performing stop control in advance have been proposed (see Patent Document 1, for example).

JP 2014-55428 A

However, the conventional technology described above requires expensive equipment (seismographs and information communication contracts) for detecting earthquakes, and cannot easily construct facilities. In addition, the control technology that receives disaster information and stops equipment had reliability problems, such as the possibility of stopping equipment due to false alarms and the possibility of delays in response due to communication failures. .

In addition, since the pumping equipment is infrastructure equipment, it is necessary to restart the pumps as soon as possible after the earthquake subsides and the equipment returns to normal. If the liquid level continues to slosh in various water tanks (oil tanks) and intake tanks, including auxiliary pumps, the liquid level will drop below the suction port, causing air to be sucked into the machine. will fail. Therefore, before restarting the pump, it is necessary to confirm that these auxiliary machines are in a state in which they can operate normally (that is, in a state in which sloshing has stopped).

However, the above conventional technology cannot detect that the earthquake has subsided and the facility has returned to normal, that is, that the facility is ready for safe operation. That is, in the above-described conventional technology, no consideration is given to the operation restoration at the time of recovery from a disaster.

The present invention has been made in consideration of the above points. The object of the present invention is to detect the occurrence of an earthquake in pump equipment without using special equipment and to safely stop operation when an earthquake occurs, or to use a special technology to detect when the earthquake has subsided and sloshing has ended. To provide a technology capable of detecting without using equipment and safely resuming operation at the end of an earthquake.

The pump equipment according to the first aspect of the present invention comprises:
A pump facility in which an internal combustion engine drives a main pump,
a plurality of reservoirs for storing or supplying liquids to the device;
a plurality of liquid level measuring instruments provided in the plurality of liquid tanks for measuring the liquid level of each liquid tank;
a monitoring control device that monitors the fluctuation amount of the liquid level of each liquid tank based on the measured values of the plurality of liquid level measuring instruments and controls the operation of the driving machine;
with
When the liquid levels of two or more liquid tanks simultaneously fluctuate periodically beyond a first threshold value predetermined for each liquid tank, the monitoring control device detects the It controls to stop the operation of the driving machine.

According to this aspect, the monitoring and control device periodically controls the liquid levels of the two or more liquid tanks to simultaneously exceed the first threshold value predetermined for each liquid tank during operation of the driving machine. By detecting the change, the occurrence of an earthquake can be detected without using special equipment. By stopping the operation of the driving machine when the monitoring control device detects such a fluctuation in the liquid level, it is possible to safely stop the operation of the pump equipment when an earthquake occurs.

A pump facility according to a second aspect of the present invention is the pump facility according to the first aspect,
After stopping the operation of the driving machine, the monitoring control device controls the amount of periodic fluctuation in the liquid level of all the liquid tanks in which the liquid level periodically fluctuates beyond the first threshold value before the stopping of the driving machine. is smaller than a second threshold value that is predetermined for each liquid tank, control is performed to restart the operation of the driving machine.

According to this aspect, the monitoring and control device controls the period of the liquid level of all the liquid tanks in which the liquid level periodically fluctuates beyond the first threshold value after the operation of the driving machine is stopped and before the operation of the driving machine is stopped. By detecting that the amount of fluctuation has become smaller than a second threshold predetermined for each liquid tank, it is detected that the earthquake has stopped and sloshing has ended without using special equipment. be able to. By restarting the operation of the drive unit when the monitoring and control device detects that the liquid level fluctuation has converged, it is possible to safely and automatically restart the operation of the pump equipment at the end of the earthquake. Become.

A pump facility according to a third aspect of the present invention is the pump facility according to the first or second aspect,
The monitoring and control device has a database in which natural periods of liquid level fluctuations for each liquid tank caused by an earthquake are stored in advance,
When the liquid levels of two or more liquid tanks simultaneously fluctuate periodically by exceeding a first threshold value predetermined for each liquid tank during operation of the driving machine, the monitoring control device , when the liquid level fluctuation period of the two or more liquid tanks coincides with the natural period of each liquid tank stored in the database, control is performed to stop the operation of the driving machine.

According to this aspect, the monitoring and control device periodically controls the liquid levels of the two or more liquid tanks to simultaneously exceed the first threshold value predetermined for each liquid tank during operation of the driving machine. If it fluctuates, determine whether or not the liquid level fluctuation period of the two or more liquid tanks matches the natural period of the liquid level fluctuation for each liquid tank caused by an earthquake. Therefore, even if the cause of the liquid level fluctuation is not an earthquake, it is possible to prevent the driving machine from being stopped excessively, and the reliability of the pump equipment can be improved. .

A pump facility according to a fourth aspect of the present invention is the pump facility according to any one of the first to third aspects,
The monitoring and control device is capable of communicating via a network with monitoring and control devices of other pump facilities installed within the same site or in the same area,
The monitoring control device notifies the monitoring control device of the other pump equipment of the occurrence of liquid level fluctuations in each liquid tank of the pump equipment while the driving machine is in operation, and monitors the other pump equipment. Based on the state of occurrence of liquid level fluctuations in the liquid tanks of the other pump equipment notified from the control device, control is performed to stop the operation of the driving machine of the pump equipment or an alarm is issued.

According to this aspect, the pump facilities installed in the same site or in the same area share the occurrence status of the liquid level fluctuation via the network, and use it for stopping the operation of the driving machine and issuing an alarm. This will enable highly reliable flood control operations in the target basin.

A pump facility according to a fifth aspect of the present invention comprises:
A pump facility in which an internal combustion engine drives a main pump,
a plurality of reservoirs for storing or supplying liquids to the device;
a plurality of liquid level measuring instruments provided in the plurality of liquid tanks for measuring the liquid level of each liquid tank;
a monitoring control device that monitors the fluctuation amount of the liquid level of each liquid tank based on the measured values of the plurality of liquid level measuring instruments and controls the operation of the driving machine;
with
After the operation of the driving machine is stopped, the monitoring control device controls the driving when the amount of periodic variation in the liquid level of all the liquid tanks becomes smaller than a second threshold value predetermined for each liquid tank. control to restart machine operation.

According to this aspect, the monitoring and control device detects that the amount of periodic fluctuation in the liquid level of all the liquid tanks becomes smaller than the second threshold value predetermined for each liquid tank after the operation of the driving machine is stopped. By detecting that the earthquake has stopped and the sloshing has ended, it can be detected without using special equipment. By restarting the operation of the drive unit when the monitoring and control device detects that the liquid level fluctuation has converged, it is possible to safely and automatically restart the operation of the pump equipment at the end of the earthquake. Become.

A diagnostic device for pump equipment according to a sixth aspect of the present invention comprises:
a data collection unit that collects time-series measurement data including measured values of the liquid level of each liquid tank from the pump equipment according to any one of the first to fifth aspects as trend management data;
a trend management unit for diagnosing deterioration or failure signs of the pump equipment based on the trend management data;
with
When the liquid levels of two or more liquid tanks simultaneously fluctuate periodically by exceeding a first threshold value predetermined for each liquid tank, the data collection unit, during operation of the driving machine, Exclude the measurement data at that time from the trend management data.

According to this aspect, the data collection unit periodically detects that the liquid levels of the two or more liquid tanks simultaneously exceed the first threshold value predetermined for each liquid tank during operation of the driving machine. By detecting the change, the occurrence of an earthquake can be detected without using special equipment. Then, when the data collection unit detects such a liquid level fluctuation, the data at that time is excluded from the trend management data as a sudden abnormal value due to an external factor (that is, an earthquake). It is possible to ensure the accuracy of trend management (prediction of failure occurrence time and guideline for replacement/repair) in the department, and the reliability as a diagnostic device can be improved.

A monitoring control device according to a seventh aspect of the present invention includes:
A monitoring control device for a pump facility in which an internal combustion engine drives a main pump,
Based on the measurement values of multiple liquid level gauges installed in multiple liquid tanks for storing liquid or supplying liquid to equipment, the amount of fluctuation in the liquid level in each liquid tank is calculated. a liquid level monitor to monitor;
During the operation of the driving machine, the liquid level monitoring unit detects that the liquid levels of two or more liquid tanks simultaneously fluctuate periodically exceeding a first threshold value predetermined for each liquid tank. an operation control unit that performs control to stop the operation of the driving machine when the
Prepare.

A monitoring control device according to an eighth aspect of the present invention is the monitoring control device according to the seventh aspect,
After the operation of the driving machine is stopped, the operation control part causes the liquid level monitoring part to detect the liquid in all the liquid tanks in which the liquid level periodically fluctuates beyond the first threshold value before the driving machine is stopped. When it is detected that the amount of periodic variation in the position has become smaller than a second threshold value that is predetermined for each liquid tank, control is performed to restart the operation of the driving device.

A monitoring control device according to a ninth aspect of the present invention is the monitoring control device according to the seventh or eighth aspect,
further comprising a database in which the natural period of liquid level fluctuations for each liquid tank caused by an earthquake is stored in advance,
The operation control unit causes the liquid level monitoring unit to periodically monitor the liquid levels of two or more liquid tanks simultaneously exceeding a first threshold predetermined for each liquid tank during operation of the driving machine. and when the period of fluctuation of the liquid level of the two or more liquid tanks matches the natural period of each liquid tank stored in the database, the driving machine Control to stop operation.

A monitoring control device according to a tenth aspect of the present invention is the monitoring control device according to any one of the seventh to ninth aspects,
further comprising a communication unit capable of communicating via a network with monitoring control devices of other pump equipment installed on the same site or in the same area,
The operation control unit notifies the monitoring control device of the other pump equipment via the communication unit of the occurrence of liquid level fluctuations in each liquid tank of the pump equipment during operation of the driving machine, and Based on the state of occurrence of liquid level fluctuations in each liquid tank of the other pump equipment notified from the monitoring control device of the other pump equipment via the communication unit, the operation of the driving machine of the pump equipment is stopped. Control or issue an alarm.

A monitoring control device according to an eleventh aspect of the present invention includes:
A monitoring control device for a pump facility in which an internal combustion engine drives a main pump,
Based on the measurement values of multiple liquid level gauges installed in multiple liquid tanks for storing liquid or supplying liquid to equipment, the amount of fluctuation in the liquid level in each liquid tank is calculated. a liquid level monitor to monitor;
After the operation of the driving machine is stopped, the liquid level monitoring unit detects that the amount of periodic variation in the liquid level of all the liquid tanks has become smaller than a second threshold value predetermined for each liquid tank. an operation control unit that performs control to restart the operation of the driving machine when the
Prepare.

A monitoring control method according to a twelfth aspect of the present invention comprises:
A method for monitoring and controlling a pump facility in which an internal combustion engine drives a main pump, comprising:
Based on the measurement values of multiple liquid level gauges installed in multiple liquid tanks for storing liquid or supplying liquid to equipment, the amount of fluctuation in the liquid level in each liquid tank is calculated. a monitoring step;
When the liquid levels of two or more liquid tanks simultaneously fluctuate periodically beyond a first threshold value predetermined for each liquid tank during operation of the driving machine, the driving machine is stopped. and
including.

A supervisory control method according to a thirteenth aspect of the present invention is the supervisory control method according to the twelfth aspect,
After stopping the operation of the driving machine and before stopping the operation of the driving machine, the amount of periodic fluctuation in the liquid level of all the liquid tanks in which the liquid level periodically fluctuated beyond the first threshold value is calculated for each liquid tank. resuming the operation of the driving machine when it becomes smaller than a predetermined second threshold;
further includes

A monitoring control method according to a fourteenth aspect of the present invention is the monitoring control method according to the twelfth or thirteenth aspect,
In the step of stopping the operation of the driving machine, the liquid levels of the two or more liquid tanks simultaneously fluctuate periodically beyond a first threshold value predetermined for each liquid tank during the operation of the driving machine. In this case, the fluctuation period of the liquid level of the two or more liquid tanks is the unique period for each liquid tank stored in a database in which the natural period of the liquid level fluctuation for each liquid tank caused by an earthquake is stored in advance. If it matches with the period, the driving of the driving machine is stopped.

A monitoring control method according to a fifteenth aspect of the present invention is the monitoring control method according to any one of the twelfth to fourteenth aspects,
During the operation of the driving machine, the status of occurrence of liquid level fluctuations in each liquid tank of the pump equipment is notified to monitoring control devices of other pump equipment installed in the same site or in the same area via the network. and stopping the operation of the driving device of the pump facility based on the state of occurrence of liquid level fluctuations in each liquid tank of the other pump facility notified via the network from the monitoring control device of the other pump facility. , or generate an alarm, step,
further includes

A monitoring control method according to a sixteenth aspect of the present invention comprises:
A method for monitoring and controlling a pump facility in which an internal combustion engine drives a main pump, comprising:
Based on the measurement values of multiple liquid level gauges installed in multiple liquid tanks for storing liquid or supplying liquid to equipment, the amount of fluctuation in the liquid level in each liquid tank is calculated. a monitoring step;
After stopping the operation of the driving machine, the driving machine is restarted when the amount of periodic variation in the liquid level of all the liquid tanks becomes smaller than a second threshold value predetermined for each liquid tank. a step;
including.

A supervisory control program according to a seventeenth aspect of the present invention comprises
to the computer,
Measured values of multiple liquid level gauges installed in multiple liquid tanks for storing liquid or supplying liquid to equipment in pump equipment that uses an internal combustion engine as the main pump drive, and measures the liquid level in each liquid tank. a step of monitoring the amount of fluctuation in the liquid level of each liquid tank based on
When the liquid levels of two or more liquid tanks simultaneously fluctuate periodically beyond a first threshold value predetermined for each liquid tank during operation of the driving machine, the driving machine is stopped. and
to run.

A supervisory control program according to an eighteenth aspect of the present invention is the supervisory control program according to the seventeenth aspect,
to the computer,
After stopping the operation of the driving machine, the amount of periodic fluctuation in the liquid level of all the liquid tanks in which the liquid level periodically fluctuated beyond the first threshold value before stopping the driving machine is calculated for each liquid tank. resuming the operation of the driving machine when it becomes smaller than a predetermined second threshold;
to be executed further.

A supervisory control program according to a nineteenth aspect of the present invention is the supervisory control program according to the seventeenth or eighteenth aspect,
In the step of stopping the operation of the driving machine, the liquid levels of the two or more liquid tanks simultaneously fluctuate periodically beyond a first threshold value predetermined for each liquid tank during the operation of the driving machine. In this case, the fluctuation period of the liquid level of the two or more liquid tanks is the unique period for each liquid tank stored in a database in which the natural period of the liquid level fluctuation for each liquid tank caused by an earthquake is stored in advance. If it matches with the period, the driving of the driving machine is stopped.

A supervisory control program according to a twentieth aspect of the present invention is the supervisory control program according to any one of the seventeenth to nineteenth aspects,
to the computer,
During the operation of the driving machine, the status of occurrence of liquid level fluctuations in each liquid tank of the pump equipment is notified to monitoring control devices of other pump equipment installed in the same site or in the same area via the network. and stopping the operation of the driving device of the pump facility based on the state of occurrence of liquid level fluctuations in each liquid tank of the other pump facility notified via the network from the monitoring control device of the other pump facility. , or generate an alarm, step,
to be executed further.

A supervisory control program according to a twenty-first aspect of the present invention comprises
to the computer,
Measured values of multiple liquid level gauges installed in multiple liquid tanks for storing liquid or supplying liquid to equipment in pump equipment that uses an internal combustion engine as the main pump drive, and measures the liquid level in each liquid tank. a step of monitoring the amount of fluctuation in the liquid level of each liquid tank based on
After stopping the operation of the driving machine, the driving machine is restarted when the amount of periodic variation in the liquid level of all the liquid tanks becomes smaller than a second threshold value predetermined for each liquid tank. a step;
to run.

A diagnostic method for pump equipment according to a twenty-second aspect of the present invention comprises:
a step of collecting, as trend management data, time-series measurement data including measured values of the liquid level of each liquid tank from the pump facility according to any one of the first to fifth aspects;
a step of diagnosing deterioration or a sign of failure of the pump equipment based on the trend management data;
including
In the step of collecting time-series measurement data as trend management data, liquid levels in two or more liquid tanks simultaneously exceed a first threshold value predetermined for each liquid tank during operation of the driving machine. , the measurement data at that time is excluded from the trend management data.

A diagnostic program for pump equipment according to a twenty-third aspect of the present invention comprises:
to the computer,
a step of collecting, as trend management data, time-series measurement data including measured values of the liquid level of each liquid tank from the pump facility according to any one of the first to fifth aspects;
a step of diagnosing deterioration or a sign of failure of the pump equipment based on the trend management data;
A diagnostic program for pump equipment that causes
In the step of collecting time-series measurement data as trend management data, liquid levels in two or more liquid tanks simultaneously exceed a first threshold value predetermined for each liquid tank during operation of the driving machine. , the measurement data at that time is excluded from the trend management data.

According to the present invention, it is possible to detect the occurrence of an earthquake in a pump facility without using special equipment, and to safely stop operation when an earthquake occurs, or to detect that the earthquake has subsided and sloshing has ended. It can be detected without using equipment, and operations can be safely resumed when the earthquake ends.

FIG. 1 is a side view schematically showing the configuration of pump equipment according to one embodiment. FIG. 2 is a plan view schematically showing the configuration of pump equipment according to one embodiment. FIG. 3 is a block diagram showing a schematic configuration of a monitoring control device according to one embodiment. FIG. 4 is a block diagram showing a schematic configuration of a pump equipment diagnosis device according to one embodiment. FIG. 5 is a diagram for explaining an example of the first threshold for liquid level fluctuation. FIG. 6 is a diagram for explaining an example of the second threshold for liquid level fluctuation. FIG. 7 is a diagram for explaining an example of trend management data. FIG. 8A is a flowchart illustrating an example of a supervisory control method according to an embodiment; 8B is a flowchart illustrating an example of a monitoring control method according to an embodiment; FIG. FIG. 9 is a flow chart showing a modified example of the monitoring control method according to one embodiment. FIG. 10 is a flow chart showing an example of a pump equipment diagnosis method according to an embodiment.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In addition, in the following description and the drawings used in the following description, the same reference numerals are used for parts that can be configured in the same manner, and redundant description is omitted.

<Pump equipment>
FIG. 1 is a side view schematically showing the configuration of pump equipment 1 according to one embodiment. FIG. 2 is a plan view schematically showing the configuration of the pump facility 1 according to one embodiment.

As shown in FIG. 1, the pump equipment 1 includes a main pump 30 having an internal combustion engine as a driving machine 35, a plurality of liquid tanks 2 to 6 for storing liquid or supplying liquid to equipment, and a plurality of liquid tanks 2 to 6, a plurality of liquid level measuring instruments 2w to 6w for measuring the liquid levels of the respective liquid tanks 2 to 6, and based on the measured values of the plurality of liquid level measuring instruments 2w to 6w, the and a monitoring control device 10 that monitors the fluctuation amount of the liquid level of the liquid and controls the operation of the driving machine 35 .

In the present embodiment, as shown in FIG. 2, the main pump 30 operates at the junction of an inland river (tributary) 72 that joins an external river (main river) 71. A plurality (four in the illustrated example) are arranged side by side along the width direction, and the water (inner water) sucked from the suction water tank 2 side is discharged to the discharge water tank 3 side. In FIG. 2, reference numeral 73 indicates a gravity gate, and reference numeral 74 indicates a sluice gate (gate) installed on an embankment (not shown).

In the following, a vertical shaft pump will be described as an example of the main pump 30, but the vertical shaft pump is only an example, and the main pump 30 according to the present embodiment is not limited to a vertical shaft pump. It may be a pump facility.

As shown in FIG. 1, the main pump 30 includes a casing 31 defining a liquid flow path therein, a longitudinally extending rotating shaft 32 inserted into the casing 31 via an outer bearing 32a, the casing 31 An impeller 33 is arranged inside and coaxially fixed to the lower end of the rotating shaft 32 , and a driving device 35 is connected to the upper end of the rotating shaft 32 via a speed reducer 34 .

The speed reducer 34 and the driving device 35 are installed adjacent to each other in the building above the water channel, and the casing 31 is installed below the speed reducer 34 . One end of the casing 31 is positioned in the suction sump 2 of the waterway and the other end of the casing 31 is positioned in the discharge sump 3 of the waterway.

As the driving machine 35, for example, an internal combustion engine such as a diesel engine or a gas turbine is used. As shown in FIG. 1, a fuel dispensing tank 5 for supplying liquid fuel to the driving machine 35 is connected to the driving machine 35, and the fuel dispensing tank 5 stores the liquid fuel. A tank 4 is connected. The fuel tank 4 is provided with a fuel pump 4a. The liquid fuel stored in the fuel oil storage tank 4 is sent to the fuel dispensing tank 5 by the fuel pump 4 a and supplied from the fuel dispensing tank 5 to the driving machine 35 . A starting air tank 37 is connected to the driving machine 35 , and starting air is supplied from the starting air tank 37 to the driving machine 35 .

The driving machine 35 is connected to the rotary shaft 32 via the reduction gear 34 . The speed reducer 34 transmits the rotational power output by the driving device 35 to the rotating shaft 32 . In the example shown in FIG. 1 , the driving machine 35 is provided with a tachometer 35n, and the measured value of the tachometer 35n is output to the monitoring control device 10 .

When the rotating shaft 32 is rotated by the rotational power provided from the driving machine 35 through the reduction gear 34, the impeller 33 arranged inside the casing 31 is rotated integrally with the rotating shaft 32, thereby rotating the casing. The liquid in 31 is caused to flow under pressure from impeller 33, and while the liquid is discharged from one end of casing 31 into discharge water tank 3, new liquid is sucked into suction water tank 2 from the other end of casing 31. be

As shown in FIG. 1, coolers 36 and 38 for cooling lubricating oil are provided in the driving machine 35 and the reduction gear 34, respectively. The coolers 36, 38 are connected in series to a cooling water tank 6 that stores cooling water. The cooling water tank 6 is provided with a cooling water pump 6a. The cooling water stored in the cooling water tank 6 is sent to the coolers 36 and 38 in order by the cooling water pump 6a and is discharged into the suction water tank 2 after heat exchange. In the example shown in FIG. 1, a pipe connecting between the cooling water pump 6a and the coolers 36, 38 is provided with a pressure gauge 36p. output.

As shown in FIG. 1, the coolers 36, 38 and the outer bearing 32a are provided with thermometers 36t, 38t, 32t for measuring the temperature of the lubricating oil, respectively. Further, the driving machine 35 is provided with a thermometer 35t for measuring exhaust temperature and the like. The measured values of the thermometers 36t, 38t, 32t, and 35t are output to the monitoring control device 10. FIG.

As shown in FIG. 1, liquid tanks 2 to 6 are provided with liquid level gauges 2w to 6w for measuring liquid levels, respectively. The liquid tanks 2 to 6 whose liquid level is measured include, for example, a fuel oil storage tank, a fuel dispensing tank, a receiving tank or a cooling water tank for cooling water equipment, a make-up tank for a vacuum pump, a suction tank, and a discharge tank. .

Water level gauges (pressure type, radio wave type, float type, ultrasonic type, etc.) that continuously measure water level data are preferably used as the liquid level measuring devices 2w to 6w. A liquid tank in which the normal liquid level does not change significantly even when the auxiliary or main machine is running (for example, a liquid tank that maintains a constant liquid level by supplying replenishing water, or a liquid resistor used for starting devices such as electric motors, etc.) ), the liquid level detectors 2w to 6w may be configured to detect liquid level fluctuations by using water level detectors that perform intermittent measurement, such as electrode type water level gauges.

In the example shown in FIG. 1, the suction water tank 2 is provided with a liquid level measuring device 2w for measuring the liquid level in the suction water tank 2. As shown in FIG. As the liquid level measuring device 2w, for example, an electrode-type water level gauge that intermittently performs measurement is used.

The discharge water tank 3 is provided with a liquid level measuring instrument 3w for measuring the liquid level in the discharge water tank 3. As shown in FIG. As the liquid level measuring device 3w, for example, an immersion type water level gauge or a radio wave type water level gauge that performs continuous measurement is used.

The fuel oil storage tank 4 is provided with a liquid level measuring instrument 4w for measuring the liquid level of the fuel oil storage tank 4 . As the liquid level measuring device 4w, for example, an oil level gauge that performs continuous measurement is used.

The fuel dispensing tank 5 is provided with a liquid level measuring instrument 5w for measuring the liquid level of the fuel dispensing tank 5 . As the liquid level measuring device 5w, for example, an electrode-type water level gauge or a float switch that intermittently performs measurement is used.

The cooling water tank 6 is provided with a liquid level measuring instrument 6w for measuring the liquid level of the cooling water tank 6 . As the liquid level measuring device 6w, for example, an electrode-type water level gauge or a float switch that performs intermittent measurement, a pressure water level gauge that performs continuous measurement, or the like is used.

The measured values of the liquid level measuring devices 2w to 6w are output to the monitoring control device 10. FIG.

<Monitoring control device>
Next, the configuration of the monitoring control device 10 will be described. FIG. 3 is a block diagram showing the configuration of the monitoring control device 10. As shown in FIG. The supervisory control device 10 can be configured by one or more computers.

As shown in FIG. 3 , the monitoring control device 10 has a control section 11 , a storage section 12 , an input section 13 , an output section 14 and a communication section 15 . Each unit is communicably connected to each other via a bus.

Among them, the input section 13 is an interface (signal input port) for the liquid level measuring instruments 2w to 6w, the thermometers 32t, 34t to 36t, the pressure gauge 36p and the tachometer 35n. The input unit 13 acquires measured values output from the liquid level measuring instruments 2w to 6w, the thermometers 32t, 34t to 36t, the pressure gauge 36p, and the tachometer 35n.

The output unit 14 is an interface (signal output port) for the driver 35 . The output unit 14 transmits control signals to the driving machine 35 .

The communication unit 15 is a communication interface between the pump facility diagnosis device 20 and the monitoring control device 10, which will be described later. The communication unit 15 transmits and receives information between the pump equipment diagnosis device 20 and the monitoring control device 10 via a network. The network may be either a wired line or a wireless line, regardless of the type or form of the line.

The communication unit 15 may be capable of communicating with monitoring control devices of other pump facilities installed in the same site or in the same area via a network.

The control unit 11 is control means for performing various processes of the monitoring control device 10 . As shown in FIG. 3, the control unit 11 has a liquid level monitoring unit 11a and an operation control unit 11b. These units 11a and 11b may be realized by executing a predetermined program by the processor in the monitoring control device 10, or may be implemented by hardware.

The liquid level monitoring unit 11a acquires through the input unit 13 the measured values of a plurality of liquid level measuring devices 2w to 6w that measure the liquid levels of the liquid tanks 2 to 6, and based on the measured values, each liquid Monitor the amount of fluctuation in the liquid level of tanks 2-6.

During operation of the drive unit 35, the operation control unit 11b simultaneously monitors the liquid levels of two or more liquid tanks 2 to 6 by the liquid level monitoring unit 11a. When it is detected that the threshold value 12b is exceeded and periodically fluctuates, control is performed to stop the operation of the driving device 35 via the output unit 14 .

During operation of the drive unit 35, the operation control unit 11b simultaneously monitors the liquid levels of two or more liquid tanks 2 to 6 by the liquid level monitoring unit 11a. When it is detected that the threshold value 12b is exceeded and the periodical fluctuation is detected, the fluctuation periods of the liquid levels of the two or more liquid tanks 2 to 6 are stored in the database 12a to be described later. Control may be performed to stop the operation of the driving machine 35 via the output unit 14 when the period coincides with every six natural periods.

The operation control unit 11b monitors the occurrence of liquid level fluctuations in the liquid tanks 2 to 6 of the pump equipment 1 while the driving machine 35 is in operation, and monitors other pump equipment installed in the same site or in the same area. Notifies the control device via the communication unit 15, and based on the occurrence of liquid level fluctuations in each liquid tank of the other pump equipment notified from the monitoring control device of the other pump equipment via the communication unit 15, A control to stop the operation of the driving machine 35 of the pump equipment 1 or an alarm may be issued.

When the liquid level monitoring unit 11a detects that the liquid levels of two or more liquid tanks 2 to 6 simultaneously exceed the first threshold value 12b and periodically fluctuates, and the operation of the driving device 35 is stopped. , the operation control unit 11b detects all liquids whose liquid levels periodically fluctuate beyond the first threshold value 12b before the operation of the driving device 35 is stopped by the liquid level monitoring unit 11a after the operation of the driving device 35 is stopped. When it is detected that the amount of periodic variation in the liquid level of the tank has become smaller than the second threshold value 12c predetermined for each of the liquid tanks 2 to 6, the driver 35 is turned on via the output unit 14. Control to resume operation.

On the other hand, when the operation of the driving machine 35 is stopped based on the occurrence of liquid level fluctuations in each liquid tank of other pump equipment, or when the driving machine 35 is stopped based on disaster information such as J-alert. In this case, the operation control unit 11b causes the liquid level monitoring unit 11a to monitor the amount of periodic fluctuation in the liquid levels of all the liquid tanks 2 to 6 after stopping the operation of the driving machine 35. When it is detected that the threshold value 12 c is smaller than the predetermined second threshold value 12 c , control is performed to restart the operation of the driving device 35 via the output unit 14 .

It should be noted that it is necessary to detect liquid level fluctuations in order to judge that an earthquake has occurred in a short period of time and to control operation shutdown, but detection of liquid level fluctuations to judge that the earthquake has stopped In consideration of the effects of aftershocks, etc., it is desirable to control the resumption of operation after confirming a certain period of time (for example, adjustable set values).

The storage unit 12 is, for example, a fixed data storage such as a hard disk. Various data handled by the control unit 11 are stored in the storage unit 12 .

The storage unit 12 has a database 12a in which natural periods of liquid level fluctuations (sloshing) for each of the liquid tanks 2 to 6 caused by an earthquake are stored. Note that sloshing is a phenomenon in which seismic waves resonate with the liquid in the liquid tank, causing the liquid surface to sway greatly.

Specifically, for example, the primary fluctuation natural period Ts [s] of a liquid tank having a water depth of H [m] and a rectangular tank width of 2 l [m] is calculated using the gravitational acceleration g [m/s ² ] as follows: It can be obtained from the following formula (1) according to Housner's theory. The database 12a may store the primary fluctuation natural period Ts[s] obtained in advance by the following formula (1) for each of the liquid tanks 2 to 6 as the natural period of liquid level fluctuation caused by an earthquake.

The storage unit 12 may store a first threshold value 12b and a second threshold value 12c of the liquid level fluctuation amount, which are predetermined for each of the liquid tanks 2 to 6. FIG. The first threshold value 12b is a value that the operation control unit 11b refers to when performing control to stop the operation of the driving device 35, and the second threshold value 12c is a value that the operation control unit 11b controls to restart the operation of the driving device 35. This is the value to refer to when performing

FIG. 5 is a diagram for explaining an example of the first threshold value 12b of the amount of liquid level fluctuation. The first threshold value 12b is a value that the operation control unit 11b, which will be described later, refers to when performing control to stop the operation of the driving machine 35. For the pump facility 1 as a social infrastructure, the liquid level fluctuation during normal operation The operation of the driving machine 35 should not be stopped by mistake. Therefore, the upper limit of the first threshold value 12b is set to be equal to or less than the liquid level rise value due to replenishment of the liquid in the liquid tanks 2 to 6 (=the upper limit of liquid level fluctuation during normal operation), and the lower limit is , the liquid level decrease due to pump operation (= lower limit of liquid level fluctuation during normal operation) or less. That is, the first threshold value 12b is set to the liquid level fluctuation amount, whichever is smaller, of the liquid level increase value due to replenishment of the liquid into the liquid tanks 2 to 6 and the liquid level decrease value due to the operation of the pump. ing. As a result, in the pump facility 1 as a social infrastructure, it is possible to prevent erroneous stoppage of the operation of the driving machine 35 due to liquid level fluctuation during normal operation.

The first threshold value 12b of the liquid level fluctuation amount may be set at a plurality of levels, and the shutdown control method may be changed according to the scale of the earthquake. For example, as shown in FIG. 5, a threshold (large) and a threshold (small) smaller than the threshold (large) may be set as the first threshold 12b for the amount of liquid level fluctuation. In this case, the operation control unit 11b controls that the liquid levels in the two or more liquid tanks 2 to 6 simultaneously exceed the predetermined threshold value (high) for each of the liquid tanks 2 to 6 during operation of the driving device 35. If it periodically fluctuates, it may be determined that the earthquake is of high urgency, and control may be performed to stop the operation of the drive unit 35 as a serious failure (emergency stop). Further, the operation control unit 11b controls that the liquid levels of the two or more liquid tanks 2 to 6 simultaneously exceed a predetermined threshold value (high) for each of the liquid tanks 2 to 6 during operation of the driving device 35. If there is no earthquake, but it periodically fluctuates beyond the threshold (small), it may be determined that it is a mild earthquake, and only a warning may be issued (without stopping the operation of the driving machine 35), or a light earthquake may be issued. Control may be performed to stop the operation of the driving machine 35 as a failure (or normal stop).

FIG. 6 is a diagram for explaining an example of the second threshold value 12c for the amount of liquid level fluctuation. The second threshold value 12c is a value that the operation control unit 11b refers to when performing control to restart the operation of the driving device 35. FIG. As an example, as shown in FIG. 6, the second threshold 12c is set to kh or less (k is an arbitrary coefficient) using the height h between the starting lower water level (LWL) and the operating lower water level (LLWL). set. For example, k may be 2 or less with a margin so that LLWL does not occur immediately at restart. Normally, the starting condition of the pump is "LWL or more", but when the liquid level is fluctuating (especially when the difference h between LWL and LLWL is small), LLWL may be detected immediately after starting. have a nature. On the other hand, when the second threshold value 12c is set to kh or less (k is greater than 1 and less than or equal to 2), it is possible to prevent LLWL from being detected immediately even if the liquid level fluctuates at the time of restarting. . As a modified example, the monitoring control device 10 is provided with a timer, and the operation control unit 11b controls the periodical fluctuation amount of the liquid levels of the liquid tanks 2 to 6 after stopping the operation of the driving machine 35 for each liquid tank. A timer may be started when the liquid level becomes smaller than a predetermined second threshold value 12c, and control may be performed to resume the operation of the driving device 35 when the liquid level does not rise when the timer expires.

As a modification, in each of the liquid tanks 2 to 6, an overflow pipe is provided at a height position corresponding to the maximum displacement amount dmax of the liquid surface assumed due to sloshing, and the liquid level monitoring unit 11a detects the outflow of the liquid from the overflow pipe. (ie, flooding) may be detected instead of the liquid level detection by the liquid level measuring devices 2w to 6w. For example, when the liquid level monitoring unit 11a detects overflow from the overflow pipes of two or more liquid tanks 2 to 6 at the same time during the operation of the driving machine 35, the operation control part 11b controls the driving machine 35. You may perform control which stops an operation. Further, it may be configured to detect overflow from the overflow pipe as a backup (double protection) of the liquid level measuring instruments 2w to 6w.

ここで、θｈおよびωは下式により表される。

In a liquid tank with a water depth of H [m] and a rectangular storage tank width of 2 l [m], the maximum displacement amount dmax [m] of the liquid surface due to sloshing is the gravitational acceleration g [m/s ² ] and the primary vibration characteristic Using the speed response spectrum value [m/s] in the period, it can be obtained from the following formula (2) according to Housner's theory.

Here, θh and ω are represented by the following equations.

In the present embodiment, as shown in FIG. 1, a pump facility diagnosis device 20 is connected to the monitoring control device 10 via a network. The network between the monitoring control device 10 and the pump equipment diagnosis device 20 may be either a wired line or a wireless line, and the type and form of the line are not limited.

<Diagnostic equipment for pump equipment>
Next, the configuration of the pump equipment diagnostic device 20 will be described. FIG. 4 is a block diagram showing the configuration of the pump equipment diagnosis device 20. As shown in FIG. The pumping station diagnostic device 20 may be configured by one or more computers.

As shown in FIG. 4 , the pump equipment diagnosis device 20 has a control section 21 , a storage section 22 and a communication section 23 . Each unit is communicably connected to each other via a bus.

Among them, the communication unit 23 is a communication interface between the monitoring control device 10 and the pump equipment diagnosis device 20 . The communication unit 23 transmits and receives information between the monitoring control device 10 and the pump equipment diagnosis device 20 via a network. The network may be either a wired line or a wireless line, regardless of the type or form of the line.

The communication unit 23 may be capable of communicating with the monitoring control devices 10 of the plurality of pump installations 1 via networks.

The storage unit 22 is fixed data storage such as a hard disk. Various data handled by the control unit 21 are stored in the storage unit 22 . The storage unit 22 also stores trend management data 22a, which is composed of time-series measurement data including measured values of liquid levels in the liquid tanks 2 to 6 of the pump equipment 1. FIG.

The control unit 21 is control means for performing various processes of the pump equipment diagnostic device 20 . As shown in FIG. 4, the control unit 21 has a data collection unit 21a and a trend management unit 21b. These units 21a and 21b may be implemented by the processor in the pump equipment diagnosis device 20 executing a predetermined program, or may be implemented by hardware.

The data collection unit 21a collects time-series measurement data including measured values of the liquid levels of the liquid tanks 2 to 6 from the pump facility 1 as trend management data 22a, and stores the data in the storage unit 22. FIG.

Based on the trend management data 22 a stored in the storage unit 22 , the trend management unit 21 b diagnoses deterioration or a sign of failure of the pump equipment 1 .

FIG. 7 is a diagram for explaining an example of the trend management data 22a. In the example shown in FIG. 7, the failure level is set in advance for the measured values, and the time-series measured data (measured values) including the measured values of the liquid levels of the liquid tanks 2 to 6 gradually change over time. has a tendency to approach the failure level at The trend management unit 21b, for example, creates an approximation straight line of time-series measurement data (measurement values) including the measured values of the liquid levels of the liquid tanks 2 to 6, and at the position of the intersection of the approximation straight line and the failure level Based on this, the remaining life of the pump equipment 1 is predicted.

In the present embodiment, the data collection unit 21a determines the liquid levels of two or more liquid tanks 2 to 6 simultaneously and in advance for each of the liquid tanks 2 to 6 while the driving machine 35 of the pump facility 1 is in operation. When it periodically fluctuates beyond the first threshold value 12b at which the excluded from the trend management data 22a.

In the example shown in FIG. 7, the two measurement data in the area surrounded by the two-dot chain line indicate that the liquid levels in two or more liquid tanks 2 to 6 are simultaneously This is measurement data when the values periodically fluctuate beyond the first threshold value 12b predetermined for each of the liquid tanks 2 to 6. FIG. If an approximate straight line is obtained from the measured data in a state in which these measurement data are included in the trend management data 22a, the straight line will be created at the position indicated by the broken line. It will be predicted incorrectly (predicting a shorter life than the original remaining life).

On the other hand, in the present embodiment, the data collection unit 21a detects the liquid levels of two or more liquid tanks 2 to 6 at the same time while the driving machine 35 of the pump facility 1 is in operation. The tendency stored in the storage unit 22 is the measurement data (the two measurement data in the area surrounded by the chain double-dashed line in FIG. 7) when the measurement data periodically fluctuates beyond the predetermined first threshold value 12b. Exclude from the management data 22a. As a result, the trend management unit 21b can create an approximate straight line at the correct position indicated by the solid line, and can accurately predict the remaining life of the pump equipment 1. FIG.

<Example of monitoring control method>
Next, an example of a monitoring control method by the monitoring control device 10 configured as described above will be described with reference to FIGS. 8A and 8B. 8A and 8B are flowcharts showing an example of a supervisory control method.

As shown in FIG. 8A, first, the operation control unit 11b determines whether or not the driving machine 35 is in operation (step S10). When it is determined that the driving machine 35 is in operation (step S10: YES), the rotary shaft 32 is rotated by the rotational power provided from the driving machine 35 via the reduction gear 34, and the inside of the casing 31 rotates. The arranged impeller 33 is rotated integrally with the rotating shaft 32 , whereby the liquid in the casing 31 receives pressure from the impeller 33 and flows, and the liquid is discharged from one end of the casing 31 into the discharge water tank 3 . At the same time, new liquid is sucked into the suction water tank 2 from the other end of the casing 31 .

A plurality of liquid level measuring instruments 2w to 6w measure the liquid levels of the liquid tanks 2 to 6, respectively, and output the measured values to the monitoring control device 10. FIG.

The liquid level monitoring unit 11a acquires measured values of the liquid levels of the liquid tanks 2 to 6 from the plurality of liquid level measuring devices 2w to 6w, and measures the liquid levels of the liquid tanks 2 to 6 based on the measured values. The amount of change is monitored (step S11).

Then, the liquid level monitoring unit 11a detects that the liquid levels of the two or more liquid tanks 2 to 6 simultaneously exceed the first threshold value 12b predetermined for each of the liquid tanks 2 to 6 during operation of the driving device 35. It is determined whether or not there has been a periodical change in the time (step S12).

If it is not detected that the liquid levels of two or more liquid tanks 2 to 6 simultaneously exceed the first threshold value 12b predetermined for each of the liquid tanks 2 to 6 (step S12: NO), the liquid level monitoring unit 11a repeats the process from step S11.

On the other hand, when it is detected that the liquid levels of two or more liquid tanks 2 to 6 simultaneously cyclically fluctuate exceeding the first threshold value 12b predetermined for each of the liquid tanks 2 to 6 ( Step S12: YES), the liquid level monitoring unit 11a checks whether the liquid level fluctuation period of the two or more liquid tanks 2 to 6 matches the natural period of each of the liquid tanks 2 to 6 stored in the database 12a. It is determined whether or not (step S13).

If the liquid level fluctuation period of two or more liquid tanks 2 to 6 does not match the natural period of each of the liquid tanks 2 to 6 stored in the database 12a (step S13: NO), the liquid level monitoring unit 11a repeats the process from step S11.

If the fluctuation period of the liquid levels of the two or more liquid tanks 2 to 6 matches the natural period of each of the liquid tanks 2 to 6 stored in the database 12a (step S13: YES), the operation control unit 11b , control is performed to stop the operation of the driving machine 35 (step S14).

Note that step S13 is not necessarily essential, and the liquid levels of two or more liquid tanks 2 to 6 simultaneously fluctuate periodically beyond the first threshold value 12b predetermined for each of the liquid tanks 2 to 6. is detected (step S12: YES), step S13 may be omitted, and the operation control unit 11b may perform control to stop the operation of the driving device 35 (step S14).

Next, the operation control unit 11b controls the occurrence of liquid level fluctuations in the liquid tanks 2 to 6 of the pump facility 1 (referred to as the first pump facility) to other pump facilities installed in the same site or in the same area. (referred to as the second pump facility) is notified via the communication unit 15 (step S15). Upon receipt of the notification, the monitoring control device of the second pump facility stops the operation of the driving machine of the second pump facility based on the occurrence of liquid level fluctuations in the liquid tanks 2 to 6 of the first pump facility 1. A control or alarm may be issued.

Note that step S15 is not limited to being performed after step S14, and may be performed before step S14. Alternatively, step S15 may be omitted.

Next, the liquid level monitoring unit 11a acquires the measured values of the liquid levels of the liquid tanks 2 to 6 from the plurality of liquid level measuring devices 2w to 6w, and based on the measured values, the liquid levels of the liquid tanks 2 to 6 are measured. The fluctuation amount of the liquid level is monitored (step S16).

Then, the liquid level monitoring unit 11a monitors the liquid levels of all the liquid tanks whose liquid levels have periodically fluctuated beyond the first threshold value 12b before the driving machine 35 is stopped after the driving machine 35 is stopped. is smaller than the second threshold value 12c predetermined for each of the liquid tanks 2 to 6 (step S17).

Periodic fluctuation amounts of the liquid levels of all the liquid tanks whose liquid levels have periodically fluctuated beyond the first threshold value 12b before the operation of the driving machine 35 is stopped are predetermined for each of the liquid tanks 2 to 6. If it is not detected that the level has become smaller than the second threshold value 12c (step S17: NO), the liquid level monitoring unit 11a repeats the process from step S16.

On the other hand, the amount of periodic fluctuation in the liquid level of all the liquid tanks whose liquid level has periodically fluctuated beyond the first threshold value 12b before the operation of the driving machine 35 is stopped is predetermined for each of the liquid tanks 2 to 6. When it is detected that the value has become smaller than the second threshold value 12c (step S17: YES), the operation control section 11b performs control to restart the operation of the driving device 35 (step S18).

If it is determined in step S10 that the driving machine 35 is not in operation (step S10: NO), the process proceeds to the start interlock circuit. That is, as shown in FIG. 8B, the liquid level monitoring unit 11a obtains measured values of the liquid levels of the respective liquid tanks 2 to 6 from the plurality of liquid level measuring devices 2w to 6w, and based on the measured values, each The fluctuation amount of the liquid level of the liquid tanks 2 to 6 is monitored (step S111).

Then, the liquid level monitoring unit 11a determines whether or not the liquid levels of the two or more liquid tanks 2 to 6 simultaneously fluctuate periodically beyond a first threshold value 12b predetermined for each of the liquid tanks 2 to 6. It is determined whether or not (step S112).

If it is not detected that the liquid levels of two or more liquid tanks 2 to 6 simultaneously exceed the first threshold value 12b predetermined for each of the liquid tanks 2 to 6 (step S112: NO), the operation control unit 10b repeats the process from step S10.

On the other hand, when it is detected that the liquid levels of two or more liquid tanks 2 to 6 simultaneously cyclically fluctuate exceeding the first threshold value 12b predetermined for each of the liquid tanks 2 to 6 ( Step S112: YES), the liquid level monitoring unit 11a determines whether the liquid level fluctuation period of the two or more liquid tanks 2 to 6 matches the natural period of each of the liquid tanks 2 to 6 stored in the database 12a. It is determined whether or not (step S113).

If the liquid level fluctuation period of two or more tanks 2 to 6 does not match the natural period of each of the liquid tanks 2 to 6 stored in the database 12a (step S113: NO), the operation control unit 10b , the process is repeated from step S10.

When the fluctuation period of the liquid levels of the two or more liquid tanks 2 to 6 matches the natural period of each of the liquid tanks 2 to 6 stored in the database 12a (step S113: YES), the operation control unit 11b , the start-up of the driving machine 35 is disabled, and an interlock is activated when the start-up condition is not met (step S114).

Note that step S113 is not necessarily essential, and the liquid levels of two or more liquid tanks 2 to 6 simultaneously fluctuate periodically beyond the first threshold value 12b predetermined for each of the liquid tanks 2 to 6. is detected (step S112: YES), step S113 may be omitted, the operation control unit 11b may disable the start of the driving machine 35, and an interlock may be activated when the starting condition is not met (step S114).

Next, the liquid level monitoring unit 11a acquires the measured values of the liquid levels of the liquid tanks 2 to 6 from the plurality of liquid level measuring devices 2w to 6w, and based on the measured values, the liquid levels of the liquid tanks 2 to 6 are measured. The fluctuation amount of the liquid level is monitored (step S116).

Then, after the interlock is activated, the liquid level monitoring unit 11a detects the amount of periodic variation in the liquid level of all the liquid tanks in which the liquid level periodically fluctuates beyond the first threshold value 12b before the interlock is activated. , and a second threshold value 12c predetermined for each of the liquid tanks 2 to 6 (step S117).

The amount of periodic fluctuation in the liquid level of all the liquid tanks whose liquid level has periodically fluctuated beyond the first threshold value 12b before the interlock is activated is determined in advance for each of the liquid tanks 2 to 6. If it is not detected that the threshold value 12c is exceeded (step S117: NO), the operation control unit 11b repeats the process from step S114.

On the other hand, the amount of periodic fluctuation of the liquid level of all the liquid tanks whose liquid level periodically fluctuated beyond the first threshold value 12b before the interlock operation is predetermined for each of the liquid tanks 2 to 6. When it is detected that the value is smaller than the second threshold value 12c (step S117: YES), the operation control section 11b releases the interlock (step S118). Then, the operation control unit 10b repeats the process from step S10.

According to the present embodiment as described above, the liquid level monitoring unit 11a is provided in each of the plurality of liquid tanks 2 to 6 for storing the liquid or supplying the liquid to the equipment, and monitors the liquid level of each of the liquid tanks 2 to 6. Based on the measured values of a plurality of liquid level measuring instruments 2w to 6w, the liquid level fluctuation amount of each of the liquid tanks 2 to 6 is monitored, and during operation of the driving device 35, two or more liquid tanks 2 to 6 At the same time, the occurrence of an earthquake can be detected without using special equipment by detecting that the liquid levels of 6 have periodically fluctuated beyond the first threshold value 12b predetermined for each liquid tank. can. When the liquid level monitoring unit 11a detects such a change in the liquid level, the operation control unit 11b stops the operation of the driving unit 35, thereby safely stopping the operation of the pump equipment in the event of an earthquake. It becomes possible to

Further, according to the present embodiment, the liquid level monitoring unit 11a simultaneously determines the liquid levels of two or more liquid tanks 2 to 6 in advance for each of the liquid tanks 2 to 6 during operation of the driving machine 35. When the liquid level of the two or more liquid tanks 2 to 6 fluctuates periodically beyond the first threshold value 12b that is set, the fluctuation period of the liquid level of each of the liquid tanks 2 to 6 caused by the earthquake Since it is determined whether or not it matches the natural period, and if it matches, the driving machine 35 is stopped. It is possible to prevent the pump equipment from being put away, and the reliability of the pump equipment 1 can be improved.

Further, according to the present embodiment, the liquid level monitoring unit 11a monitors all the liquid levels that periodically fluctuate beyond the first threshold value 12b after the driving machine 35 is stopped and before the driving machine 35 is stopped. By detecting that the amount of periodic fluctuation in the liquid level of the liquid tanks 2 to 6 has become smaller than the second threshold value 12c predetermined for each of the liquid tanks 2 to 6, the earthquake stops and the sloshing ends. It can be detected without using any special equipment. When the liquid level monitoring unit 11a detects that the liquid level fluctuation has converged, the operation control unit 11b restarts the operation of the driving unit 35, thereby safely operating the pump facility 1 at the end of the earthquake. can be automatically restarted.

In addition, according to the present embodiment, pump facilities installed in the same site or in the same area share the occurrence status of liquid level fluctuations via the network, and stop the operation of the driving machine and issue an alarm. By using it, highly reliable flood control operation will be possible in the target basin.

<Modified Example of Monitoring Control Method>
Next, a modified example of the monitoring control method by the monitoring control device 10 will be described with reference to FIG. FIG. 9 is a flow chart showing a modified example of the monitoring control method.

As shown in FIG. 9, first, the operation control section 11b causes the driving machine 35 to start operating (step S20). When the rotating shaft 32 is rotated by the rotational power provided from the driving machine 35 through the reduction gear 34, the impeller 33 arranged inside the casing 31 is rotated integrally with the rotating shaft 32, thereby rotating the casing. The liquid in 31 is caused to flow under pressure from impeller 33, and while the liquid is discharged from one end of casing 31 into discharge water tank 3, new liquid is sucked into suction water tank 2 from the other end of casing 31. be

During the operation of the driving machine 35, the monitoring control device 10 receives from the monitoring control device of another pump facility (referred to as the second pump facility) installed in the same site or in the same area, the liquid tanks of the second pump facility. Upon receiving notification of the occurrence of liquid level fluctuations or receiving disaster information such as J-alert (step S21), the operation control unit 11b detects the occurrence of liquid level fluctuations in each tank of the second pump equipment, Alternatively, based on disaster information such as J-alert, control is performed to stop the operation of the driving machine 35 (step S22).

Next, the liquid level monitoring unit 11a acquires the measured values of the liquid levels of the liquid tanks 2 to 6 from the plurality of liquid level measuring devices 2w to 6w, and based on the measured values, the liquid levels of the liquid tanks 2 to 6 are measured. The fluctuation amount of the liquid level is monitored (step S23).

Then, the liquid level monitoring unit 11a detects the periodical fluctuation amount of the liquid levels of all the liquid tanks 2 to 6 after the operation of the driving machine 35 is stopped by the predetermined second threshold value for each of the liquid tanks 2 to 6. It is determined whether or not it has become smaller than 12c (step S24).

If it is not detected that the amount of periodic variation in the liquid levels of all the liquid tanks 2 to 6 has become smaller than the second threshold value 12c predetermined for each of the liquid tanks 2 to 6 (step S24 : NO), the liquid level monitoring unit 11a repeats the process from step S23.

When it is detected that the amount of periodic variation in the liquid levels of all the liquid tanks 2 to 6 has become smaller than the second threshold value 12c predetermined for each of the liquid tanks 2 to 6 (step S24: YES), the operation control unit 11b performs control to restart the operation of the driving machine 35 (step S25).

According to the present embodiment as described above, the liquid level monitoring unit 11a detects the amount of periodic variation in the liquid levels of all the liquid tanks 2 to 6 after the operation of the driving machine 35 is stopped. It is possible to detect that the earthquake has stopped and the sloshing has ended without using a special device by detecting that it has become smaller than the second threshold value 12c that is predetermined every time. When the liquid level monitoring unit 11a detects that the liquid level fluctuation has converged, the operation control unit 11b restarts the operation of the driving unit 35, thereby safely operating the pump facility 1 at the end of the earthquake. can be automatically restarted.

<Example of diagnostic method for pump equipment>
Next, an example of a pump equipment diagnosis method by the pump equipment diagnosis device 20 will be described with reference to FIG. 10 . FIG. 10 is a flow chart showing an example of a diagnostic method for pump equipment.

As shown in FIG. 10, first, the data collection unit 21a collects time-series measurement data including measured values of the liquid levels of the liquid tanks 2 to 6 from the pump facility 1 as trend management data 22a, and the storage unit 22 (step S30).

The data collection unit 21a sets the liquid levels of two or more liquid tanks 2 to 6 at the same time while the driving machine 35 of the pump facility 1 is in operation, and sets the first threshold value 12b predetermined for each of the liquid tanks 2 to 6. It is determined whether or not there has been a periodic fluctuation beyond the threshold (step S31).

When it is detected that the liquid levels of two or more liquid tanks 2 to 6 simultaneously exceed the first threshold value 12b predetermined for each of the liquid tanks 2 to 6 and periodically fluctuate (step S31 : YES), the data collection unit 21a determines whether or not the liquid level fluctuation period of the two or more liquid tanks 2 to 6 coincides with the natural period of the liquid level fluctuation of each of the liquid tanks 2 to 6 caused by the earthquake. (step S32).

If the liquid level fluctuation period of two or more liquid tanks 2 to 6 coincides with the natural period of the liquid level fluctuation of each of the liquid tanks 2 to 6 caused by the earthquake (step S32: YES), the data collection unit 21a excludes the measurement data at that time from the trend management data 22a stored in the storage unit 22 (step S33).

Note that step S32 is not necessarily essential, and the liquid levels of two or more liquid tanks 2 to 6 simultaneously fluctuate periodically beyond the first threshold value 12b predetermined for each of the liquid tanks 2 to 6. is detected (step S31: YES), step S32 is omitted, and the data collection unit 21a excludes the measurement data at that time from the trend management data 22a stored in the storage unit 22. (step S33).

Based on the trend management data 22a stored in the storage unit 22, the trend management unit 21b diagnoses deterioration or a sign of failure of the pump equipment 1 (step S34).

According to the present embodiment as described above, the data collection unit 21a simultaneously determines the liquid levels of two or more liquid tanks 2 to 6 in advance while the driving machine 35 is in operation. The occurrence of an earthquake can be detected without using special equipment by detecting periodic fluctuations exceeding the set first threshold 12b. Then, when the data collection unit 21a detects such a liquid level fluctuation, the data at that time is excluded from the trend management data 22a as a sudden abnormal value due to an external factor (that is, an earthquake). It is possible to ensure the accuracy of trend management (prediction of failure occurrence time and guideline for replacement/repair) in the trend management unit 21b, and the reliability of the diagnostic device 20 can be improved.

Although the embodiments and modifications of the present invention have been described above by way of illustration, the scope of the present invention is not limited to these, and changes and modifications can be made according to the purpose within the scope described in the claims. is possible. In addition, each embodiment and modifications can be appropriately combined within a range in which the contents are not inconsistent.

In addition, although the monitoring control device 10 according to the present embodiment can be configured by one or more computers, a program for realizing the monitoring control device 10 in one or more computers and a recording medium recording the program is also subject to protection in this case.

In addition, although the pump equipment diagnostic device 20 according to the present embodiment can be configured by one or more computers, a program for realizing the pump equipment diagnostic device 20 in one or more computers and the program The recording medium on which it is recorded is also subject to protection in this case.

1 pump equipment 2 suction water tank 2w liquid level measuring instrument 3 discharge water tank 3w liquid level measuring instrument 4 fuel oil storage tank 4w liquid level measuring instrument 4a fuel pump 5 fuel discharge tank 5w liquid level measuring instrument 6 cooling water tank 6a cooling water pump 6w liquid Level measuring instrument 10 Monitoring control device 11 Control unit 11a Liquid level monitoring unit 11b Operation control unit 12 Storage unit 12a Database 12b storing the natural period of liquid level fluctuations caused by an earthquake First threshold value 12c Second threshold value 13 Input unit 14 Output unit 15 Communication unit 20 Pump equipment diagnosis device 21 Control unit 21a Data collection unit 21b Trend management unit 22 Storage unit 22a Trend management data 23 Communication unit 30 Pump equipment 31 Casing 32 Rotating shaft 32a Outer bearing 32t Thermometer 33 Impeller 34 Reducer 35 Drive machine 35t Thermometer 35n Tachometer 36 Cooler 36t Thermometer 36p Pressure gauge 37 Starting air tank 38 Cooler 38t Thermometer 71 External water river (main river)
72 Inland rivers (tributaries)
73 Gravity gate 74 Drain gutter pipe

Claims (18)

A pump facility in which an internal combustion engine drives a main pump,
a plurality of reservoirs for storing or supplying liquids to the device;
a plurality of liquid level measuring instruments provided in the plurality of liquid tanks for measuring the liquid level of each liquid tank;
a monitoring control device that monitors the fluctuation amount of the liquid level of each liquid tank based on the measured values of the plurality of liquid level measuring instruments and controls the operation of the driving machine;
with
When the liquid levels of two or more liquid tanks simultaneously fluctuate periodically beyond a first threshold value predetermined for each liquid tank, the monitoring control device detects the Control to stop the operation of the driving machine,
The monitoring and control device is capable of communicating via a network with monitoring and control devices of other pump facilities installed within the same site or in the same area,
The monitoring control device notifies the monitoring control device of the other pump equipment of the occurrence of liquid level fluctuations in each liquid tank of the pump equipment while the driving machine is in operation, and monitors the other pump equipment. Based on the state of occurrence of liquid level fluctuations in each liquid tank of the other pump equipment notified from the control device, perform control to stop the operation of the driving machine of the pump equipment or issue an alarm;
A pump facility characterized by: After stopping the operation of the driving machine, the monitoring control device controls the amount of periodic fluctuation in the liquid level of all the liquid tanks in which the liquid level periodically fluctuates beyond the first threshold value before the stopping of the driving machine. is smaller than a second threshold value that is predetermined for each liquid tank, performing control to restart the operation of the driving machine.
2. Pumping equipment according to claim 1, characterized in that: The monitoring and control device has a database in which natural periods of liquid level fluctuations for each liquid tank caused by an earthquake are stored in advance,
When the liquid levels of two or more liquid tanks simultaneously fluctuate periodically by exceeding a first threshold value predetermined for each liquid tank during operation of the driving machine, the monitoring control device , when the liquid level fluctuation period of the two or more liquid tanks matches the natural period of each liquid tank stored in the database, performing control to stop the operation of the driving machine;
3. Pump equipment according to claim 1 or 2, characterized in that: A pumping facility using an internal combustion engine as a driving machine for a main pump, comprising a plurality of liquid tanks for storing liquid or supplying liquid to equipment, and provided in the plurality of liquid tanks to measure the liquid level of each liquid tank. a plurality of liquid level measuring instruments, and a monitoring control device that monitors the fluctuation amount of the liquid level of each liquid tank based on the measured values of the plurality of liquid level measuring instruments and controls the operation of the driving machine. When the liquid levels of two or more liquid tanks simultaneously fluctuate periodically by exceeding a first threshold value predetermined for each liquid tank, the monitoring control device controls the operation of the driving machine. a data collection unit that collects, as trend management data, time-series measurement data including measured values of the liquid level of each liquid tank from the pump equipment, which performs control to stop the operation of the driving machine;
a trend management unit for diagnosing deterioration or failure signs of the pump equipment based on the trend management data;
with
When the liquid levels of two or more liquid tanks simultaneously fluctuate periodically by exceeding a first threshold value predetermined for each liquid tank, the data collection unit, during operation of the driving machine, A diagnostic device for pump equipment, characterized in that measurement data at that time is excluded from trend management data. A pumping facility using an internal combustion engine as a driving machine for a main pump, comprising a plurality of liquid tanks for storing liquid or supplying liquid to equipment, and provided in the plurality of liquid tanks to measure the liquid level of each liquid tank. a plurality of liquid level measuring instruments, and a monitoring control device that monitors the fluctuation amount of the liquid level of each liquid tank based on the measured values of the plurality of liquid level measuring instruments and controls the operation of the driving machine. In addition, the monitoring and control device, after stopping the operation of the driving machine, when the amount of periodic fluctuation in the liquid level of all the liquid tanks becomes smaller than a second threshold value predetermined for each liquid tank, a data collection unit that collects, as trend management data, time-series measurement data including measured values of the liquid level of each liquid tank from the pump equipment, which performs control to restart the operation of the driving machine;
a trend management unit for diagnosing deterioration or failure signs of the pump equipment based on the trend management data;
with
When the liquid levels of two or more liquid tanks simultaneously fluctuate periodically by exceeding a first threshold value predetermined for each liquid tank, the data collection unit, during operation of the driving machine, Exclude current measurement data from trend management data
A diagnostic device for pump equipment characterized by: A monitoring control device for a pump facility in which an internal combustion engine drives a main pump,
Based on the measurement values of multiple liquid level gauges installed in multiple liquid tanks for storing liquid or supplying liquid to equipment, the amount of fluctuation in the liquid level in each liquid tank is calculated. a liquid level monitor to monitor;
During the operation of the driving machine, the liquid level monitoring unit detects that the liquid levels of two or more liquid tanks simultaneously fluctuate periodically exceeding a first threshold value predetermined for each liquid tank. an operation control unit that performs control to stop the operation of the driving machine when the
a communication unit capable of communicating with monitoring control devices of other pump equipment installed in the same site or in the same area via a network;
with
The operation control unit notifies the monitoring control device of the other pump equipment via the communication unit of the occurrence of liquid level fluctuations in each liquid tank of the pump equipment during operation of the driving machine, and Based on the state of occurrence of liquid level fluctuations in each liquid tank of the other pump equipment notified from the monitoring control device of the other pump equipment via the communication unit, the operation of the driving machine of the pump equipment is stopped. provide control or alarm,
A monitoring control device characterized by: After the operation of the driving machine is stopped, the operation control part causes the liquid level monitoring part to detect the liquid in all the liquid tanks in which the liquid level periodically fluctuates beyond the first threshold value before the driving machine is stopped. When it is detected that the periodical fluctuation amount of the position has become smaller than a second threshold value predetermined for each liquid tank, control is performed to restart the operation of the driving machine.
7. The supervisory control device according to claim 6 , characterized in that: further comprising a database in which the natural period of liquid level fluctuations for each liquid tank caused by an earthquake is stored in advance,
The operation control unit causes the liquid level monitoring unit to periodically monitor the liquid levels of two or more liquid tanks simultaneously exceeding a first threshold predetermined for each liquid tank during operation of the driving machine. and when the period of fluctuation of the liquid level of the two or more liquid tanks matches the natural period of each liquid tank stored in the database, the driving machine control to stop driving,
8. The monitoring control device according to claim 6 or 7 , characterized in that: A method for monitoring and controlling a pump facility in which an internal combustion engine drives a main pump, comprising:
Based on the measurement values of multiple liquid level gauges installed in multiple liquid tanks for storing liquid or supplying liquid to equipment, the amount of fluctuation in the liquid level in each liquid tank is calculated. a monitoring step;
When the liquid levels of two or more liquid tanks simultaneously fluctuate periodically beyond a first threshold value predetermined for each liquid tank during operation of the driving machine, the driving machine is stopped. and
During the operation of the driving machine, the status of occurrence of liquid level fluctuations in each liquid tank of the pump equipment is notified to monitoring control devices of other pump equipment installed in the same site or in the same area via the network. and stopping the operation of the driving device of the pump facility based on the state of occurrence of liquid level fluctuations in each liquid tank of the other pump facility notified via the network from the monitoring control device of the other pump facility. , or issuing an alarm;
A supervisory control method, comprising: After stopping the operation of the driving machine and before stopping the operation of the driving machine, the amount of periodic fluctuation in the liquid level of all the liquid tanks in which the liquid level periodically fluctuated beyond the first threshold value is calculated for each liquid tank. resuming the operation of the driving machine when it becomes smaller than a predetermined second threshold;
10. The supervisory control method according to claim 9 , further comprising: In the step of stopping the operation of the driving machine, the liquid levels of the two or more liquid tanks simultaneously fluctuate periodically beyond a first threshold value predetermined for each liquid tank during the operation of the driving machine. In this case, the fluctuation period of the liquid level of the two or more liquid tanks is the unique period for each liquid tank stored in a database in which the natural period of the liquid level fluctuation for each liquid tank caused by an earthquake is stored in advance. stopping the operation of the driving machine when it matches the period;
11. The monitoring control method according to claim 9 or 10 , characterized in that: to the computer,
Measured values of multiple liquid level gauges installed in multiple liquid tanks for storing liquid or supplying liquid to equipment in pump equipment that uses an internal combustion engine as the main pump drive, and measures the liquid level in each liquid tank. a step of monitoring the amount of fluctuation in the liquid level of each liquid tank based on
When the liquid levels of two or more liquid tanks simultaneously fluctuate periodically beyond a first threshold value predetermined for each liquid tank during operation of the driving machine, the driving machine is stopped. and
During the operation of the driving machine, the status of occurrence of liquid level fluctuations in each liquid tank of the pump equipment is notified to monitoring control devices of other pump equipment installed in the same site or in the same area via the network. and stopping the operation of the driving device of the pump facility based on the state of occurrence of liquid level fluctuations in each liquid tank of the other pump facility notified via the network from the monitoring control device of the other pump facility. , or issuing an alarm;
A supervisory control program characterized by executing to the computer,
After stopping the operation of the driving machine and before stopping the operation of the driving machine, the amount of periodic fluctuation in the liquid level of all the liquid tanks in which the liquid level periodically fluctuated beyond the first threshold value is calculated for each liquid tank. resuming the operation of the driving machine when it becomes smaller than a predetermined second threshold;
13. The supervisory control program according to claim 12 , further comprising: In the step of stopping the operation of the driving machine, the liquid levels of the two or more liquid tanks simultaneously fluctuate periodically beyond a first threshold value predetermined for each liquid tank during the operation of the driving machine. In this case, the fluctuation period of the liquid level of the two or more liquid tanks is the unique period for each liquid tank stored in a database in which the natural period of the liquid level fluctuation for each liquid tank caused by an earthquake is stored in advance. stopping the operation of the driving machine when it matches the period;
14. The supervisory control program according to claim 12 or 13 , characterized by: A pumping facility using an internal combustion engine as a driving machine for a main pump, comprising a plurality of liquid tanks for storing liquid or supplying liquid to equipment, and provided in the plurality of liquid tanks to measure the liquid level of each liquid tank. a plurality of liquid level measuring instruments, and a monitoring control device that monitors the fluctuation amount of the liquid level of each liquid tank based on the measured values of the plurality of liquid level measuring instruments and controls the operation of the driving machine. When the liquid levels of two or more liquid tanks simultaneously fluctuate periodically by exceeding a first threshold value predetermined for each liquid tank, the monitoring control device controls the operation of the driving machine. a step of collecting, as trend management data, time-series measurement data including measured values of the liquid level of each liquid tank from the pump equipment for performing control to stop the operation of the driving machine ;
a step of diagnosing deterioration or a sign of failure of the pump equipment based on the trend management data;
including
In the step of collecting time-series measurement data as trend management data, liquid levels in two or more liquid tanks simultaneously exceed a first threshold value predetermined for each liquid tank during operation of the driving machine. A diagnostic method for a pump facility, characterized in that, when the measured data at that point in time fluctuates periodically from the trend management data. A pumping facility using an internal combustion engine as a driving machine for a main pump, comprising a plurality of liquid tanks for storing liquid or supplying liquid to equipment, and provided in the plurality of liquid tanks to measure the liquid level of each liquid tank. a plurality of liquid level measuring instruments, and a monitoring control device that monitors the fluctuation amount of the liquid level of each liquid tank based on the measured values of the plurality of liquid level measuring instruments and controls the operation of the driving machine. In addition, the monitoring and control device, after stopping the operation of the driving machine, when the amount of periodic fluctuation in the liquid level of all the liquid tanks becomes smaller than a second threshold value predetermined for each liquid tank, a step of collecting, as trend management data, time-series measurement data including measured values of the liquid level of each liquid tank from a pump facility for performing control to restart the operation of the driving machine;
a step of diagnosing deterioration or a sign of failure of the pump equipment based on the trend management data;
including
In the step of collecting time-series measurement data as trend management data, liquid levels in two or more liquid tanks simultaneously exceed a first threshold value predetermined for each liquid tank during operation of the driving machine. , the measurement data at that time is excluded from the trend management data.
A diagnostic method for pump equipment, characterized by: to the computer,
A pumping facility using an internal combustion engine as a driving machine for a main pump, comprising a plurality of liquid tanks for storing liquid or supplying liquid to equipment, and provided in the plurality of liquid tanks to measure the liquid level of each liquid tank. a plurality of liquid level measuring instruments, and a monitoring control device that monitors the fluctuation amount of the liquid level of each liquid tank based on the measured values of the plurality of liquid level measuring instruments and controls the operation of the driving machine. When the liquid levels of two or more liquid tanks simultaneously fluctuate periodically by exceeding a first threshold value predetermined for each liquid tank, the monitoring control device controls the operation of the driving machine. a step of collecting, as trend management data, time-series measurement data including measured values of the liquid level of each liquid tank from the pump equipment for performing control to stop the operation of the driving machine ;
a step of diagnosing deterioration or a sign of failure of the pump equipment based on the trend management data;
A diagnostic program for pump equipment that causes
In the step of collecting time-series measurement data as trend management data, liquid levels in two or more liquid tanks simultaneously exceed a first threshold value predetermined for each liquid tank during operation of the driving machine. A diagnostic program for pump equipment, characterized in that, when the measured data at that time periodically fluctuates, the measured data at that time is excluded from the trend management data. to the computer,
A pumping facility using an internal combustion engine as a driving machine for a main pump, comprising a plurality of liquid tanks for storing liquid or supplying liquid to equipment, and provided in the plurality of liquid tanks to measure the liquid level of each liquid tank. a plurality of liquid level measuring instruments, and a monitoring control device that monitors the fluctuation amount of the liquid level of each liquid tank based on the measured values of the plurality of liquid level measuring instruments and controls the operation of the driving machine. In addition, the monitoring and control device, after stopping the operation of the driving machine, when the amount of periodic fluctuation in the liquid level of all the liquid tanks becomes smaller than a second threshold value predetermined for each liquid tank, a step of collecting, as trend management data, time-series measurement data including measured values of the liquid level of each liquid tank from a pump facility for performing control to restart the operation of the driving machine;
a step of diagnosing deterioration or a sign of failure of the pump equipment based on the trend management data;
A diagnostic program for pump equipment that causes
In the step of collecting time-series measurement data as trend management data, liquid levels in two or more liquid tanks simultaneously exceed a first threshold value predetermined for each liquid tank during operation of the driving machine. , the measurement data at that time is excluded from the trend management data.
A diagnostic program for pump equipment characterized by:

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