JP2021063461A - Pump installation, diagnosis device for pump installation, monitoring control device, monitoring control method, monitoring control program, diagnosis method for pump installation, and diagnosis program for pump installation - Google Patents

Abstract

To provide a technology capable of detecting occurrence of an earthquake without using a special device and capable of stopping operation safely in the occurrence of the earthquake, in a pump installation.SOLUTION: A pump installation is a pump installation in which an internal combustion engine serves as a driving machine of a main pump, and comprises: a plurality of liquid tanks that stores or supplying liquid to a device; a plurality of liquid level measuring instruments that are provided in the plurality of liquid tanks and measures the liquid level of each liquid tank; and a monitoring control device that monitors an amount of fluctuation in 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. The monitoring control device performs control to stop the operation of the driving machine when the liquid levels of two or more liquid tanks simultaneously change periodically beyond a first threshold value set in advance for each liquid tank during the operation of the driving machine.SELECTED DRAWING: Figure 1

Description

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

Conventionally, in pump equipment used for hydraulic control, an internal combustion engine such as a diesel engine is often used as a drive machine for a main pump, and an engine having an output of several thousand kW may be used for a large one.

In pump equipment that uses such an internal combustion engine, many auxiliary equipment and small pipes such as fuel equipment and cooling water equipment are installed, and in the event of an earthquake, these auxiliary equipment and equipment such as the main pump and internal combustion engine There is a possibility that an abnormality will occur in the engine and it will break down.

When a device is damaged due to a failure, a long recovery period is required and a high cost is incurred. In addition, since the pump cannot be operated during the restoration period, it will lead to the loss of function as a social infrastructure. For this reason, seismographs are installed and disaster information such as J-alerts is received so that these devices can be safely stopped (before failure) immediately before or immediately after an earthquake occurs. A technique for performing stop control in advance has been proposed (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2014-55428

However, in the above-mentioned conventional technology, expensive equipment (seismometer and information communication contract) for detecting an earthquake is required, and the equipment cannot be easily constructed. In addition, the control technology that receives disaster information and stops the device has problems in reliability, such as the possibility of stopping the device due to a false alarm and the possibility of delay in dealing with it due to a communication failure. ..

In addition, since the pump equipment is an infrastructure equipment, it is required to restart the pump as soon as possible when the earthquake subsides and the equipment returns to the normal state, but even if the earthquake itself subsides, it will be installed in the pump equipment. If the liquid level swings (slosing) continues in various water tanks (oil tanks) and intake tanks, the liquid level drops below the suction port, including the auxiliary pump, and air is sucked in. Will break down. Therefore, before restarting the pump, it is necessary to confirm that these auxiliary equipment relationships are in a state where they can operate normally (that is, a state in which sloshing is suppressed).

However, with the above-mentioned prior art, it is not possible to detect that the earthquake has subsided and the equipment has returned to a normal state, that is, a state in which safe operation is possible. That is, in the above-mentioned conventional technique, the operation restoration at the time of disaster recovery is not considered.

The present invention has been made in consideration of the above points. An object of the present invention is a technique for detecting the occurrence of an earthquake in a pump facility without using a special device and safely stopping the operation in the event of an earthquake, or a special technique for stopping the operation after the earthquake has subsided. The purpose is to provide a technology that can detect without using equipment and safely resume operation at the end of an earthquake.

The pump equipment according to the first aspect of the present invention is
Pump equipment that uses an internal combustion engine as the main pump drive
With multiple liquid tanks for storing or supplying liquids to equipment,
A plurality of liquid level measuring instruments provided in the plurality of liquid tanks and measuring the liquid level of each liquid tank, and
A monitoring control device that monitors the amount of fluctuation in 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
The monitoring control device is described when the liquid levels of two or more liquid tanks simultaneously and periodically fluctuate beyond a first threshold value predetermined for each liquid tank during the operation of the drive machine. Controls to stop the operation of the drive unit.

According to such an aspect, the monitoring and control device periodically exceeds the first threshold value set in advance for each liquid tank at the same time while the driving machine is in operation. By detecting the fluctuation, the occurrence of an earthquake can be detected without using special equipment. Then, when the monitoring and control device detects such a fluctuation in the liquid level, the operation of the drive unit is stopped, so that the operation of the pump equipment can be safely stopped in the event of an earthquake.

The pump equipment according to the second aspect of the present invention is the pump equipment according to the first aspect.
In the monitoring control device, the amount of periodic fluctuations in the liquid levels of all the liquid tanks in which the liquid level periodically fluctuates beyond the first threshold value after the operation of the drive unit is stopped and before the operation of the drive unit is stopped. However, when it becomes smaller than the second threshold value set in advance for each liquid tank, the operation of the drive machine is controlled to be restarted.

According to such an embodiment, the monitoring and control device periodically fluctuates the liquid level beyond the first threshold value after the operation of the drive unit is stopped and before the operation of the drive unit is stopped. By detecting that the amount of fluctuation is smaller than the second threshold value set in advance for each liquid tank, it is detected that the earthquake has subsided and sloshing has ended without using special equipment. be able to. Then, when the monitoring and control device detects the convergence of such liquid level fluctuations, the operation of the drive unit is restarted, so that the operation of the pump equipment can be safely and automatically restarted at the end of the earthquake. Become.

The pump equipment according to the third aspect of the present invention is the pump equipment according to the first or second aspect.
The monitoring control device has a database in which the natural period of the liquid level fluctuation for each liquid tank generated by an earthquake is stored in advance.
The monitoring control device is a case where the liquid levels of two or more liquid tanks simultaneously and periodically fluctuate beyond a first threshold value predetermined for each liquid tank during the operation of the drive machine. When the fluctuation cycle of the liquid level of the two or more liquid tanks matches the natural cycle of each liquid tank stored in the database, the operation of the drive machine is controlled to be stopped.

According to such an aspect, the monitoring and control device periodically exceeds the first threshold value set in advance for each liquid tank at the same time while the driving machine is in operation. When it fluctuates, it is determined whether or not the fluctuation cycle of the liquid level of the two or more liquid tanks matches the natural cycle of the liquid level fluctuation of each liquid tank generated by the earthquake, and if they match, the drive unit Since the operation of the pump is stopped, it is possible to prevent the operation of the drive machine from being excessively stopped even if the cause of the liquid level fluctuation is not an earthquake, and the reliability of the pump equipment can be improved. ..

The pump equipment according to the fourth aspect of the present invention is the pump equipment according to any one of the first to third aspects.
The monitoring control device can communicate with the monitoring control device of other pump equipment installed in the same site or in the same area via a network.
The monitoring and control device notifies the monitoring and control device of the other pumping equipment of the occurrence status of the liquid level fluctuation of each liquid tank of the pumping equipment during the operation of the driving machine, and monitors the other pumping equipment. Based on the occurrence status of the liquid level fluctuation of each liquid tank of the other pump equipment notified from the control device, the control or the alarm for stopping the operation of the drive of the pump equipment is issued.

According to this aspect, pump equipment installed on the same site or in the same area can share the occurrence status of liquid level fluctuations via a network and use it to stop the operation of the drive unit or issue an alarm. Therefore, highly reliable hydraulic operation can be performed in the target basin.

The pump equipment according to the fifth aspect of the present invention is
Pump equipment that uses an internal combustion engine as the main pump drive
With multiple liquid tanks for storing or supplying liquids to equipment,
A plurality of liquid level measuring instruments provided in the plurality of liquid tanks and measuring the liquid level of each liquid tank, and
A monitoring control device that monitors the amount of fluctuation in 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
The monitoring control device drives the drive when the periodic fluctuation amount of the liquid level in all the liquid tanks becomes smaller than the second threshold value predetermined for each liquid tank after the operation of the drive unit is stopped. Controls to restart the operation of the aircraft.

According to such an embodiment, after the operation of the drive unit is stopped, the periodic fluctuation amount of the liquid level of all the liquid tanks becomes smaller than the second threshold value predetermined for each liquid tank. By detecting this, it is possible to detect that the earthquake has subsided and sloshing has ended without using special equipment. Then, when the monitoring and control device detects the convergence of such liquid level fluctuations, the operation of the drive unit is restarted, so that the operation of the pump equipment can be safely and automatically restarted at the end of the earthquake. Become.

The diagnostic device for pump equipment according to the sixth aspect of the present invention is
A data collection unit that collects time-series measurement data including measured values of the liquid level of each liquid tank as trend management data from the pump equipment according to any one of the first to fifth aspects.
A tendency management unit that diagnoses deterioration or failure signs of the pump equipment based on the tendency management data,
With
When the liquid level of two or more liquid tanks simultaneously fluctuates beyond the first threshold value predetermined for each liquid tank during the operation of the drive unit, the data collection unit periodically fluctuates. Exclude the measurement data at that time from the trend management data.

According to such an aspect, the data collecting unit periodically exceeds the first threshold value set in advance for each liquid tank at the same time while the driving machine is in operation. By detecting the fluctuation, the occurrence of an earthquake can be detected without using special equipment. Then, when the data collection unit detects such a fluctuation in the liquid level, the data at that time is excluded from the tendency management data as a sudden abnormal value due to an external factor (that is, an earthquake), thereby managing the tendency. It is possible to ensure the accuracy of trend management (estimation of failure occurrence time and guideline for replacement / repair) in the department, and it is possible to improve the reliability as a diagnostic device.

The monitoring control device according to the seventh aspect of the present invention is
A monitoring and control device for pump equipment that uses an internal combustion engine as the drive for the main pump.
The amount of fluctuation in the liquid level of each liquid tank is determined based on the measured values of multiple liquid level measuring instruments provided in multiple liquid tanks for storing or supplying liquid to the equipment and measuring the liquid level of each liquid tank. The liquid level monitoring unit to be monitored and
During the operation of the drive machine, the liquid level monitoring unit detects that the liquid levels of two or more liquid tanks simultaneously and periodically fluctuate beyond a first threshold value predetermined for each liquid tank. When this is done, an operation control unit that controls to stop the operation of the drive unit and
To be equipped.

The monitoring control device according to the eighth aspect of the present invention is the monitoring control device according to the seventh aspect.
After the operation of the drive unit is stopped, the operation control unit periodically fluctuates the liquid level beyond the first threshold value by the liquid level monitoring unit before the operation of the drive unit is stopped. When it is detected that the periodic fluctuation amount of the position becomes smaller than the second threshold value set in advance for each liquid tank, the operation of the driving machine is controlled to be restarted.

The monitoring control device according to the ninth aspect of the present invention is the monitoring control device according to the seventh or eighth aspect.
It also has a database in which the natural period of liquid level fluctuation for each liquid tank generated by an earthquake is stored in advance.
During the operation of the drive machine, the operation control unit periodically exceeds the first threshold value set in advance for each liquid tank at the same time by the liquid level monitoring unit. When the fluctuation cycle of the liquid level of the two or more liquid tanks coincides with the natural cycle of each liquid tank stored in the database, the driving machine Control to stop the operation.

The monitoring control device according to the tenth aspect of the present invention is the monitoring control device according to any one of the seventh to ninth aspects.
It is further equipped with a communication unit that can communicate via a network with the monitoring and control devices of other pump equipment installed on the same site or in the same area.
The operation control unit notifies the monitoring and control device of the other pump equipment via the communication unit of the occurrence status of the liquid level fluctuation of each liquid tank of the pump equipment during the operation of the drive, and also, the operation control unit. The operation of the drive unit of the pump equipment is stopped based on the occurrence status of the liquid level fluctuation of each liquid tank of the other pump equipment notified from the monitoring control device of the other pump equipment via the communication unit. Control or issue an alarm.

The monitoring control device according to the eleventh aspect of the present invention is
A monitoring and control device for pump equipment that uses an internal combustion engine as the drive for the main pump.
The amount of fluctuation in the liquid level of each liquid tank is determined based on the measured values of multiple liquid level measuring instruments provided in multiple liquid tanks for storing or supplying liquid to the equipment and measuring the liquid level of each liquid tank. The liquid level monitoring unit to be monitored and
After the operation of the drive is stopped, the liquid level monitoring unit detects that the periodic fluctuation amount of the liquid level in all the liquid tanks becomes smaller than the second threshold value predetermined for each liquid tank. In such a case, an operation control unit that controls to restart the operation of the drive unit and
To be equipped.

The monitoring control method according to the twelfth aspect of the present invention is
A monitoring and control method for pump equipment that uses an internal combustion engine as the main pump drive.
The amount of fluctuation in the liquid level of each liquid tank is determined based on the measured values of multiple liquid level measuring instruments provided in multiple liquid tanks for storing or supplying liquid to the equipment and measuring the liquid level of each liquid tank. Steps to monitor and
During the operation of the drive, if the liquid levels of two or more liquid tanks simultaneously change periodically exceeding the first threshold value set in advance for each liquid tank, the operation of the drive is stopped. Steps to do and
including.

The monitoring control method according to the thirteenth aspect of the present invention is the monitoring control method according to the twelfth aspect.
After the operation of the drive machine is stopped and before the operation of the drive machine is stopped, the amount of periodic fluctuation of the liquid level of all the liquid tanks whose liquid level fluctuates beyond the first threshold value is determined for each liquid tank. A step of restarting the operation of the driving machine when the threshold value becomes smaller than a predetermined second threshold value.
Including further.

The monitoring control method according to the 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 drive machine, the liquid levels of two or more liquid tanks simultaneously change periodically exceeding the first threshold value set in advance for each liquid tank during the operation of the drive machine. In this case, the fluctuation cycle of the liquid level of the two or more liquid tanks is unique to each liquid tank stored in the database in which the natural cycle of the liquid level fluctuation for each liquid tank generated by the earthquake is stored in advance. When the cycle matches, the operation of the drive is stopped.

The monitoring control method according to the 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 drive, the occurrence status of liquid level fluctuations in each liquid tank of the pump equipment is notified to the monitoring and control devices of other pump equipment installed in the same site or in the same area via a network. , The operation of the drive unit of the pump equipment is stopped based on the occurrence status of the liquid level fluctuation of each liquid tank of the other pump equipment notified from the monitoring control device of the other pump equipment via the network. , Or issue an alarm, step,
Including further.

The monitoring control method according to the sixteenth aspect of the present invention is
A monitoring and control method for pump equipment that uses an internal combustion engine as the main pump drive.
The amount of fluctuation in the liquid level of each liquid tank is determined based on the measured values of multiple liquid level measuring instruments provided in multiple liquid tanks for storing or supplying liquid to the equipment and measuring the liquid level of each liquid tank. Steps to monitor and
After the operation of the drive is stopped, when the periodic fluctuation amount of the liquid level in all the liquid tanks becomes smaller than the second threshold value predetermined for each liquid tank, the operation of the drive is restarted. Steps and
including.

The monitoring control program according to the seventeenth aspect of the present invention
On the computer
In pump equipment whose main pump is an internal combustion engine, the measured values of a plurality of liquid level measuring instruments provided in a plurality of liquid tanks for storing or supplying liquid to the equipment and measuring the liquid level of each liquid tank. And the step of monitoring the fluctuation amount of the liquid level in each liquid tank based on
During the operation of the drive, if the liquid levels of two or more liquid tanks simultaneously change periodically exceeding the first threshold value set in advance for each liquid tank, the operation of the drive is stopped. Steps to do and
To execute.

The monitoring control program according to the eighteenth aspect of the present invention is the monitoring control program according to the seventeenth aspect.
On the computer
After the operation of the drive machine is stopped and before the operation of the drive machine is stopped, the amount of periodic fluctuation of the liquid level of all the liquid tanks whose liquid level fluctuates beyond the first threshold value is determined for each liquid tank. A step of restarting the operation of the driving machine when the threshold value becomes smaller than a predetermined second threshold value.
To execute further.

The monitoring control program according to the 19th aspect of the present invention is the monitoring control program according to the 17th or 18th aspect.
In the step of stopping the operation of the drive machine, the liquid levels of two or more liquid tanks simultaneously change periodically exceeding the first threshold value set in advance for each liquid tank during the operation of the drive machine. In this case, the fluctuation cycle of the liquid level of the two or more liquid tanks is unique to each liquid tank stored in the database in which the natural cycle of the liquid level fluctuation for each liquid tank generated by the earthquake is stored in advance. When the cycle matches, the operation of the drive is stopped.

The monitoring control program according to the twentieth aspect of the present invention is a monitoring control program according to any one of the 17th to 19th aspects.
On the computer
During the operation of the drive, the occurrence status of liquid level fluctuations in each liquid tank of the pump equipment is notified to the monitoring and control devices of other pump equipment installed in the same site or in the same area via a network. , The operation of the drive unit of the pump equipment is stopped based on the occurrence status of the liquid level fluctuation of each liquid tank of the other pump equipment notified from the monitoring control device of the other pump equipment via the network. , Or issue an alarm, step,
To execute further.

The monitoring control program according to the 21st aspect of the present invention
On the computer
In pump equipment whose main pump is an internal combustion engine, the measured values of a plurality of liquid level measuring instruments provided in a plurality of liquid tanks for storing or supplying liquid to the equipment and measuring the liquid level of each liquid tank. And the step of monitoring the fluctuation amount of the liquid level in each liquid tank based on
After the operation of the drive is stopped, when the periodic fluctuation amount of the liquid level in all the liquid tanks becomes smaller than the second threshold value predetermined for each liquid tank, the operation of the drive is restarted. Steps and
To execute.

The diagnostic method for pump equipment according to the 22nd aspect of the present invention is
A step of collecting 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, and
Based on the trend management data, the step of diagnosing the deterioration or failure sign of the pump equipment, and
Including
In the step of collecting the time-series measurement data as trend management data, the liquid levels of two or more liquid tanks simultaneously exceed the first threshold value set in advance for each liquid tank during the operation of the drive machine. If it fluctuates periodically, the measurement data at that time is excluded from the trend management data.

The diagnostic program for pump equipment according to the 23rd aspect of the present invention is
On the computer
A step of collecting 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, and
Based on the trend management data, the step of diagnosing the deterioration or failure sign of the pump equipment, and
It is a diagnostic program for pump equipment that executes
In the step of collecting the time-series measurement data as trend management data, the liquid levels of two or more liquid tanks simultaneously exceed the first threshold value set in advance for each liquid tank during the operation of the drive machine. If it fluctuates periodically, the measurement data at that time is excluded from the trend management data.

According to the present invention, in the pump equipment, the occurrence of an earthquake can be detected without using a special device, and the operation can be safely stopped in the event of an earthquake, or it is special that the earthquake has subsided and the slosing has been completed. It can be detected without using equipment and can safely resume operation at the end of an earthquake.

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

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. 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 duplicate description is omitted.

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

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

In the present embodiment, as shown in FIG. 2, the main pump 30 is the inland river (tributary) 72 at the confluence portion of the inland river (tributary) 72 that joins the external river (tributary) 71. A plurality of waters (four in the illustrated example) are installed side by side along the width direction, and the water (internal 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 natural flow sluice gate, and reference numeral 74 indicates a gutter gate (gate) installed on the embankment (not shown).

Hereinafter, the 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 the vertical shaft pump, but is not limited to the vertical shaft pump or the submersible pump. It may be a pump facility.

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

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

As the drive unit 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 dispenser 5 for supplying liquid fuel to the drive 35 is connected to the drive 35, and the fuel dispenser 5 stores fuel oil for storing the liquid fuel. The tank 4 is connected. The fuel oil storage 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 4a, and is supplied from the fuel dispensing tank 5 to the drive unit 35. Further, 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 drive 35 is connected to the rotary shaft 32 via the speed reducer 34. The speed reducer 34 transmits the rotational power output by the drive 35 to the rotary shaft 32. In the example shown in FIG. 1, the drive unit 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 via the speed reducer 34, the impeller 33 arranged inside the casing 31 is rotated integrally with the rotating shaft 32, whereby the casing The liquid in 31 is flowed under pressure from the impeller 33, the liquid is discharged from one end of the casing 31 into the discharge water tank 3, and new liquid is sucked into the suction water tank 2 from the other end of the casing 31. Is done.

As shown in FIG. 1, the drive unit 35 and the speed reducer 34 are provided with coolers 36 and 38 for cooling the lubricating oil, respectively. The coolers 36 and 38 are connected in series to the cooling water tank 6 for storing the 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 sequentially sent to the coolers 36 and 38 by the cooling water pump 6a to exchange heat, and then is discharged into the suction water tank 2. In the example shown in FIG. 1, a pressure gauge 36p is provided in the pipe connecting the cooling water pump 6a and the coolers 36 and 38, and the measured value of the pressure gauge 36p is transferred to the monitoring control device 10. It is output.

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

As shown in FIG. 1, each of the liquid tanks 2 to 6 is provided with liquid level measuring instruments 2w to 6w for measuring the liquid level. Examples of the liquid tanks 2 to 6 in which the liquid level is measured include a fuel storage tank, a fuel dispensing tank, a water receiving tank or a cooling water tank for cooling water equipment, a refill tank for a vacuum pump, a suction water tank, and a discharge water tank. ..

As the liquid level measuring instruments 2w to 6w, a water level gauge (pressure type, radio wave type, float type, ultrasonic type, etc.) that measures continuous water level data is preferably used. A liquid tank in which the normal liquid level does not change significantly even when the auxiliary machine or main engine is operated (for example, a liquid tank that maintains a constant water level level by supplying replenishing water, a liquid resistor used for a starting device such as an electric motor, etc. ), The liquid level measuring instruments 2w to 6w may be configured to detect the liquid level fluctuation by using a water level detector such as an electrode type water level gauge that performs intermittent measurement.

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 of the suction water tank 2. As the liquid level measuring instrument 2w, for example, an electrode type water level gauge that performs intermittent measurement is used.

The discharge water tank 3 is provided with a liquid level measuring device 3w for measuring the liquid level of the discharge water tank 3. As the liquid level measuring instrument 3w, for example, an immersion type water level gauge or a radio wave type water level gauge that continuously measures 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 instrument 4w, for example, an oil level gauge that continuously measures is used.

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

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

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

<Monitoring and 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. The monitoring control device 10 may be composed of one or more computers.

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

Of these, the input unit 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 the 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, respectively.

The output unit 14 is an interface (signal output port) for the drive unit 35. The output unit 14 transmits a control signal to the drive unit 35.

The communication unit 15 is a communication interface between the pump equipment diagnostic device 20 and the monitoring control device 10, which will be described later. The communication unit 15 transmits / receives information between the pump equipment diagnostic device 20 and the monitoring / control device 10 via a network. The network may be either a wired line or a wireless line, and the type and form of the line do not matter.

The communication unit 15 may be able to communicate with a monitoring control device of another pump facility installed in the same site or in the same area via a network.

The control unit 11 is a control means that performs various processes of the monitoring control device 10. As shown in FIG. 3, the control unit 11 includes a liquid level monitoring unit 11a and an operation control unit 11b. Each of these parts 11a and 11b may be realized by the processor in the monitoring control device 10 executing a predetermined program, or may be implemented by hardware.

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

In the operation control unit 11b, during the operation of the drive machine 35, the liquid level of two or more liquid tanks 2 to 6 is simultaneously determined by the liquid level monitoring unit 11a for each of the liquid tanks 2 to 6. When it is detected that the fluctuation exceeds the threshold value 12b and periodically fluctuates, the operation of the drive unit 35 is controlled to be stopped via the output unit 14.

During the operation of the drive unit 35, the operation control unit 11b has a first liquid level monitoring unit 11a in which the liquid levels of two or more liquid tanks 2 to 6 are simultaneously predetermined for each of the liquid tanks 2 to 6. When it is detected that the fluctuation exceeds the threshold value 12b and the fluctuation is periodic, the fluctuation cycle of the liquid level of the liquid tanks 2 to 6 of the two or more tanks is stored in the database 12a described later. When the natural period of each of 6 is matched, the operation of the drive machine 35 may be stopped via the output unit 14.

The operation control unit 11b monitors the occurrence status of liquid level fluctuations in each of the liquid tanks 2 to 6 of the pump equipment 1 during the operation of the drive unit 35 by monitoring other pump equipment installed in the same site or in the same area. The control device is notified via the communication unit 15, and the monitoring and control device of the other pump equipment notifies the control device via the communication unit 15 based on the occurrence status of the liquid level fluctuation of each liquid tank of the other pump equipment. You may control to stop the operation of the drive machine 35 of the pump equipment 1 or issue an alarm.

When the operation of the drive unit 35 is stopped because 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 fluctuate periodically. In the operation control unit 11b, after the operation of the drive machine 35 is stopped, the liquid level monitoring unit 11a periodically fluctuates the liquid level beyond the first threshold value 12b before the operation of the drive unit 35 is stopped. When it is detected that the amount of periodic fluctuation of the liquid level in the tank becomes smaller than the second threshold value 12c set in advance for each of the liquid tanks 2 to 6, the drive unit 35 is operated via the output unit 14. Controls to restart the operation.

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

It is necessary to detect the liquid level fluctuation to judge that an earthquake has occurred in a short time and control the operation stop, but to detect the liquid level fluctuation to judge that the earthquake has subsided. It is desirable to control the restart of operation after confirming a certain period of time (for example, an adjustable set value) in consideration of the influence of aftershocks and the like.

The storage unit 12 is 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 the natural period of the liquid level fluctuation (slosing) for each of the liquid tanks 2 to 6 generated by the earthquake is stored. Sloshing is a phenomenon in which the seismic wave resonates with the liquid in the liquid tank and the liquid level fluctuates greatly, and is generated when seismic motion having a period substantially the same as the natural period of the liquid tank is input.

Specifically, for example, the primary fluctuation natural period Ts [s] of the liquid tank having a water depth of H [m] and a rectangular storage tank width of 2 l [m] uses a gravitational acceleration g [m / s ² ]. According to Houser's theory, it can be obtained from the following equation (1). In the database 12a, the primary fluctuation natural period Ts [s] obtained in advance by the following equation (1) for each of the liquid tanks 2 to 6 may be stored as the natural period of the liquid level fluctuation generated by the earthquake.

The storage unit 12 may store the first threshold value 12b and the second threshold value 12c of the liquid level fluctuation amount predetermined for each of the liquid tanks 2 to 6. The first threshold value 12b is a value referred to when the operation control unit 11b controls to stop the operation of the drive unit 35, and the second threshold value 12c is a control for the operation control unit 11b to restart the operation of the drive unit 35. This is the value to be referred to when performing.

FIG. 5 is a diagram for explaining an example of the first threshold value 12b of the liquid level fluctuation amount. The first threshold value 12b is a value referred to when the operation control unit 11b, which will be described later, controls to stop the operation of the drive unit 35, but for the pump equipment 1 as a social infrastructure, the liquid level fluctuation during normal operation It should not be possible to accidentally stop the operation of the drive unit 35 due to the above. Therefore, the upper limit side of the first threshold value 12b is set to be equal to or lower than the liquid level rise value (= upper limit value of liquid level fluctuation during normal operation) due to the replenishment of liquid into the liquid tanks 2 to 6, and the lower limit side is , It is set to be less than or equal to the liquid level decrease value (= lower limit value of liquid level fluctuation during normal operation) due to pump operation. That is, the first threshold value 12b is set to the smaller of the liquid level increase value due to the replenishment of the liquid into the liquid tanks 2 to 6 and the liquid level decrease value due to the operation of the pump, whichever is smaller. ing. As a result, in the pump equipment 1 as a social infrastructure, it is possible to prevent the operation of the drive machine 35 from being accidentally stopped due to the fluctuation of the liquid level during normal operation.

The first threshold value 12b of the liquid level fluctuation amount is set at a plurality of levels, and the operation stop control method may be changed according to the scale of the earthquake. For example, as shown in FIG. 5, as the first threshold value 12b of the liquid level fluctuation amount, a threshold value (large) and a threshold value (small) smaller than the threshold value (large) may be set. In this case, the operation control unit 11b simultaneously exceeds the threshold value (large) set in advance for each of the liquid tanks 2 to 6 while the drive unit 35 is operating. If it fluctuates periodically, it may be determined that the earthquake has a high degree of urgency, and control may be performed to stop the operation of the drive unit 35 as a serious failure (emergency stop). Further, in the operation control unit 11b, during the operation of the drive machine 35, the liquid levels of the two or more liquid tanks 2 to 6 simultaneously exceed the threshold value (large) set in advance for each of the liquid tanks 2 to 6. If it does not exist, but it fluctuates periodically beyond the threshold value (small), it may be judged that it is a mild earthquake, and only an alarm may be issued (without stopping the operation of the drive unit 35), or it may be light. Control may be performed to stop the operation of the drive unit 35 as a failure (or normal stop).

FIG. 6 is a diagram for explaining an example of the second threshold value 12c of the liquid level fluctuation amount. The second threshold value 12c is a value referred to when the operation control unit 11b controls to restart the operation of the drive unit 35. As an example, as shown in FIG. 6, the second threshold value 12c is set to kh or less (k is an arbitrary coefficient) by using the height h between the starting lower limit water level (LWL) and the operating lower limit water level (LLWL). Set. For example, as k, 2 or less may be used with a margin so that the LLWL does not become immediate at the time of restart. The starting condition of a normal pump is "LWL or higher", but when the liquid level is fluctuating (especially when the difference h between LWL and LLWL is small), it is possible to detect LLWL immediately after starting. There is sex. On the other hand, when the second threshold value 12c is set to kh or less (k is larger than 1 and 2 or less), it is possible to suppress the detection of LLWL immediately even if the liquid level fluctuates at the time of restart. .. As a modification, a timer is provided in the monitoring control device 10, and in the operation control unit 11b, after the operation of the drive unit 35 is stopped, the amount of periodic fluctuation of the liquid level in the liquid tanks 2 to 6 is changed for each liquid tank. Control may be performed to start the timer when the value becomes smaller than the predetermined second threshold value 12c and restart the operation of the drive unit 35 when the liquid level does not rise when the timer is completed.

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 by sloshing, and the liquid level monitoring unit 11a causes the liquid to flow out from the overflow pipe. By detecting (that is, overflow), the liquid level may be detected by the liquid level measuring instruments 2w to 6w. For example, when the operation control unit 11b detects overflow from the overflow pipe for two or more liquid tanks 2 to 6 at the same time by the liquid level monitoring unit 11a during the operation of the drive unit 35, the operation control unit 11b of the drive unit 35. Control to stop the operation may be performed. 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 having 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 gravitational acceleration g [m / s ² ] and is inherent in primary vibration. It can be obtained from the following equation (2) by Houser's theory using the velocity response spectrum value [m / s] in the period.

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

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

<Diagnostic device for pump equipment>
Next, the configuration of the diagnostic device 20 for pump equipment will be described. FIG. 4 is a block diagram showing the configuration of the diagnostic device 20 for pump equipment. The diagnostic device 20 for pump equipment may be composed of one or more computers.

As shown in FIG. 4, the diagnostic device 20 for pump equipment includes a control unit 21, a storage unit 22, and a communication unit 23. Each part is communicatively connected to each other via a bus.

Of these, the communication unit 23 is a communication interface between the monitoring control device 10 and the diagnostic device 20 for pump equipment. The communication unit 23 transmits / receives information between the monitoring control device 10 and the pump equipment diagnostic device 20 via a network. The network may be either a wired line or a wireless line, and the type and form of the line do not matter.

The communication unit 23 may be able to communicate with the monitoring and control devices 10 of the plurality of pump facilities 1 via a network.

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

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

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

The tendency management unit 21b diagnoses deterioration or failure sign of the pump equipment 1 based on the tendency management data 22a stored in the storage unit 22.

FIG. 7 is a diagram for explaining an example of 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 measurement data (measured values) including the measured values of the liquid levels of the respective liquid tanks 2 to 6 gradually increase as time elapses. Has a tendency to approach the failure level. For example, the trend management unit 21b creates an approximate straight line of time-series measurement data (measured value) including the measured values of the liquid levels of each liquid tank 2 to 6, and at the position of the intersection of the approximate straight line and the failure level. Based on this, the remaining life of the pump equipment 1 is predicted.

In the present embodiment, in the data collecting unit 21a, the liquid levels of two or more liquid tanks 2 to 6 are simultaneously determined for each of the liquid tanks 2 to 6 during the operation of the drive machine 35 of the pump equipment 1. When the fluctuation exceeds the first threshold value 12b and periodically fluctuates, the measurement data at that time (for example, the measurement data for several minutes before and after the moment when the first threshold value 12b is exceeded) is stored in the storage unit 22. Exclude from the trend management data 22a.

In the example shown in FIG. 7, the two measurement data in the area surrounded by the alternate long and short dash line show that the liquid levels of two or more liquid tanks 2 to 6 are simultaneously set during the operation of the drive machine 35 of the pump equipment 1. This is measurement data when the liquid tanks 2 to 6 periodically fluctuate beyond a predetermined first threshold value 12b. If these measurement data are included in the trend management data 22a and an approximate straight line is obtained from the measurement data, a straight line will be created at the position indicated by the broken line, and as a result, the remaining life of the pump equipment 1 will be reduced. It will be predicted incorrectly (it will predict the life shorter than the original remaining life).

On the other hand, in the present embodiment, in the data collecting unit 21a, during the operation of the drive machine 35 of the pump equipment 1, the liquid levels of the two or more liquid tanks 2 to 6 are simultaneously set for each of the liquid tanks 2 to 6. The tendency that the storage unit 22 stores the measurement data (two measurement data in the area surrounded by the two-point chain line in FIG. 7) when the measurement data periodically fluctuates beyond the predetermined first threshold value 12b. Exclude from 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.

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

As shown in FIG. 8A, first, the operation control unit 11b determines whether or not the drive unit 35 is in operation (step S10). When it is determined that the drive unit 35 is in operation (step S10: YES), the rotary shaft 32 is rotated by the rotational power provided from the drive unit 35 via the speed reducer 34, and is inside the casing 31. The arranged impeller 33 is rotated integrally with the rotating shaft 32, whereby the liquid in the casing 31 is flowed under pressure from the impeller 33, 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.

The plurality of liquid level measuring instruments 2w to 6w each measure the liquid level of each of the liquid tanks 2 to 6, and output the measured value to the monitoring control device 10.

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

Then, in the liquid level monitoring unit 11a, during the operation of the drive machine 35, the liquid levels of the two or more liquid tanks 2 to 6 simultaneously exceed the first threshold value 12b set in advance for each of the liquid tanks 2 to 6. It is determined whether or not the fluctuation is periodic (step S12).

When it is not detected that the liquid levels of two or more liquid tanks 2 to 6 simultaneously fluctuate beyond the predetermined first threshold value 12b 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 the two or more liquid tanks 2 to 6 simultaneously fluctuate beyond the predetermined first threshold value 12b for each of the liquid tanks 2 to 6 ( Step S12: YES), in the liquid level monitoring unit 11a, does the liquid level fluctuation cycle of the two or more liquid tanks 2 to 6 coincide with the natural cycle of each liquid tank 2 to 6 stored in the database 12a? It is determined whether or not (step S13).

When the fluctuation cycle of the liquid level of the liquid tanks 2 to 6 of two or more tanks does not match the natural cycle 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.

When the fluctuation cycle of the liquid level of the liquid tanks 2 to 6 of two or more tanks matches the natural cycle of each liquid tank 2 to 6 stored in the database 12a (step S13: YES), the operation control unit 11b , Control to stop the operation of the drive unit 35 (step S14).

It should be noted that step S13 is not always indispensable, and the liquid levels of the two or more liquid tanks 2 to 6 simultaneously fluctuate periodically exceeding the first threshold value 12b set in advance for each of the liquid tanks 2 to 6. If is detected (step S12: YES), step S13 may be omitted, and the operation control unit 11b may control to stop the operation of the drive unit 35 (step S14).

Next, the operation control unit 11b checks the occurrence status of the liquid level fluctuation in each of the liquid tanks 2 to 6 of the pump equipment 1 (referred to as the first pump equipment) with other pump equipment installed in the same site or in the same area. Notify the monitoring control device (referred to as the second pump equipment) via the communication unit 15 (step S15). Upon receiving the notification, the monitoring and control device of the second pump equipment stops the operation of the drive unit of the second pump equipment based on the occurrence status of the liquid level fluctuation of each of the liquid tanks 2 to 6 of the first pump equipment 1. 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 instruments 2w to 6w, and based on the measured values, the liquid tanks 2 to 6 The amount of fluctuation in the liquid level is monitored (step S16).

Then, the liquid level monitoring unit 11a periodically fluctuates the liquid level of all the liquid tanks after the operation of the drive unit 35 is stopped and before the operation of the drive unit 35 is stopped and the liquid level exceeds the first threshold value 12b. It is determined whether or not the amount of fluctuation is smaller than the predetermined second threshold value 12c for each of the liquid tanks 2 to 6 (step S17).

The amount of periodic fluctuation of the liquid level of all the liquid tanks in which the liquid level exceeds the first threshold value 12b and periodically fluctuates before the operation of the drive unit 35 is stopped is predetermined for each of the liquid tanks 2 to 6. If it is not detected that the threshold value is 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 of the liquid level of all the liquid tanks in which the liquid level exceeds the first threshold value 12b and periodically fluctuates before the operation of the drive unit 35 is stopped is predetermined for each of the liquid tanks 2 to 6. When it is detected that the threshold value is smaller than the second threshold value 12c (step S17: YES), the operation control unit 11b controls to restart the operation of the drive unit 35 (step S18).

If it is determined in step S10 that the drive unit 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 acquires the measured values of the liquid levels of the liquid tanks 2 to 6 from the plurality of liquid level measuring instruments 2w to 6w, and based on the measured values, each of them. The amount of fluctuation in the liquid level in the liquid tanks 2 to 6 is monitored (step S111).

Then, in the liquid level monitoring unit 11a, whether or not the liquid levels of the two or more liquid tanks 2 to 6 fluctuate periodically exceeding the first threshold value 12b set in advance for each of the liquid tanks 2 to 6 at the same time. (Step S112).

When it is not detected that the liquid levels of two or more liquid tanks 2 to 6 simultaneously fluctuate beyond the predetermined first threshold value 12b 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 the two or more liquid tanks 2 to 6 simultaneously fluctuate beyond the predetermined first threshold value 12b for each of the liquid tanks 2 to 6 ( Step S112: YES), in the liquid level monitoring unit 11a, does the liquid level fluctuation cycle of the two or more liquid tanks 2 to 6 coincide with the natural cycle of each liquid tank 2 to 6 stored in the database 12a? It is determined whether or not (step S113).

When the fluctuation cycle of the liquid level of the liquid tanks 2 to 6 of two or more tanks does not match the natural cycle 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 cycle of the liquid level of the liquid tanks 2 to 6 of two or more tanks matches the natural cycle of each liquid tank 2 to 6 stored in the database 12a (step S113: YES), the operation control unit 11b , The drive machine 35 cannot be started, and the interlock in which the start condition is not satisfied is activated (step S114).

It should be noted that step S113 is not always indispensable, and the liquid levels of the two or more liquid tanks 2 to 6 simultaneously fluctuate periodically exceeding the first threshold value 12b set in advance for each of the liquid tanks 2 to 6. If is detected (step S112: YES), step S113 may be omitted, the operation control unit 11b may disable the start of the drive unit 35, and the interlock in which the start condition is not satisfied may be activated (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 instruments 2w to 6w, and based on the measured values, the liquid tanks 2 to 6 The amount of fluctuation in the liquid level is monitored (step S116).

Then, in the liquid level monitoring unit 11a, after the operation of the interlock and before the operation of the interlock, the amount of periodic fluctuation of the liquid level of all the liquid tanks in which the liquid level exceeds the first threshold value 12b and fluctuates periodically is increased. , It is determined whether or not it is smaller than the predetermined second threshold value 12c for each of the liquid tanks 2 to 6 (step S117).

The amount of periodic fluctuation of the liquid level of all the liquid tanks in which the liquid level exceeds the first threshold value 12b and periodically fluctuates before the operation of the interlock is determined in advance for each of the liquid tanks 2 to 6. If it is not detected that the threshold value is smaller than the threshold value 12c (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 in which the liquid level exceeds the first threshold value 12b and periodically fluctuates before the operation of the interlock is predetermined for each of the liquid tanks 2 to 6. When it is detected that the threshold value is smaller than the second threshold value 12c (step S117: YES), the operation control unit 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 a plurality of liquid tanks 2 to 6 for storing or supplying the liquid to the equipment, and the liquid level of each liquid tank 2 to 6 is adjusted. Based on the measured values of the plurality of liquid level measuring instruments 2w to 6w to be measured, the fluctuation amount of the liquid level of each liquid tank 2 to 6 is monitored, and during the operation of the drive machine 35, two or more liquid tanks 2 to 2 By simultaneously detecting that the liquid level of No. 6 fluctuates periodically exceeding the first threshold value 12b set in advance for each liquid tank, it is possible to detect the occurrence of an earthquake without using special equipment. it can. Then, when such a fluctuation in the liquid level is detected by the liquid level monitoring unit 11a, the operation control unit 11b stops the operation of the drive unit 35, so that the operation of the pump equipment is safely stopped in the event of an earthquake. It becomes possible to do.

Further, according to the present embodiment, the liquid level monitoring unit 11a determines the liquid levels of two or more liquid tanks 2 to 6 at the same time for each of the liquid tanks 2 to 6 during the operation of the drive machine 35. When the fluctuation cycle exceeds the first threshold value 12b, the fluctuation cycle of the liquid level of the two or more liquid tanks 2 to 6 is the fluctuation of the liquid level of each of the liquid tanks 2 to 6 generated by the earthquake. It is determined whether or not it matches the natural period, and if it matches, the operation of the drive unit 35 is stopped. Therefore, even if the cause of the liquid level fluctuation is not an earthquake, the operation of the drive unit 35 is excessively stopped. It is possible to prevent the pump equipment 1 from being stowed, and the reliability of the pump equipment 1 can be improved.

Further, according to the present embodiment, the liquid level monitoring unit 11a periodically fluctuates beyond the first threshold value 12b after the operation of the drive unit 35 is stopped and before the operation of the drive unit 35 is stopped. By detecting that the periodic fluctuation amount of the liquid level in the liquid tanks 2 to 6 becomes smaller than the second threshold value 12c set in advance for each of the liquid tanks 2 to 6, the earthquake subsides and the sloshing ends. It is possible to detect what is being done without using special equipment. Then, when the liquid level monitoring unit 11a detects the convergence of such liquid level fluctuations, the operation control unit 11b restarts the operation of the drive unit 35, so that the operation of the pump equipment 1 is safe at the end of the earthquake. It will be possible to restart automatically.

Further, according to the present embodiment, the pump equipments installed in the same site or in the same area share the occurrence status of the liquid level fluctuation via the network, and the operation of the drive unit is stopped or an alarm is issued. By using it, highly reliable hydraulic operation can be performed in the target basin.

<An example of a modification of the 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 flowchart showing a modified example of the monitoring control method.

As shown in FIG. 9, first, the operation control unit 11b starts the operation of the drive unit 35 (step S20). When the rotating shaft 32 is rotated by the rotational power provided from the driving machine 35 via the speed reducer 34, the impeller 33 arranged inside the casing 31 is rotated integrally with the rotating shaft 32, whereby the casing The liquid in 31 is flowed under pressure from the impeller 33, the liquid is discharged from one end of the casing 31 into the discharge water tank 3, and new liquid is sucked into the suction water tank 2 from the other end of the casing 31. Is done.

During the operation of the drive unit 35, the monitoring and control device 10 is transferred from the monitoring and control device of another pump facility (referred to as the second pump facility) installed in the same site or in the same area to each liquid tank of the second pump facility. When a notification of the occurrence status of the liquid level fluctuation is received or a disaster information such as a J alert is received (step S21), the operation control unit 11b determines the occurrence status of the liquid level fluctuation in each liquid tank of the second pump equipment. Alternatively, control is performed to stop the operation of the drive unit 35 based on disaster information such as J alert (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 instruments 2w to 6w, and based on the measured values, the liquid tanks 2 to 6 The amount of fluctuation in the liquid level is monitored (step S23).

Then, in the liquid level monitoring unit 11a, after the operation of the drive unit 35 is stopped, the amount of periodic fluctuation of the liquid level of all the liquid tanks 2 to 6 is set to a second threshold value predetermined for each of the liquid tanks 2 to 6. It is determined whether or not it is smaller than 12c (step S24).

When it is not detected that the periodic fluctuation amount of the liquid levels of all the liquid tanks 2 to 6 becomes smaller than the second threshold value 12c set in advance 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 periodic fluctuation amount of the liquid levels of all the liquid tanks 2 to 6 becomes smaller than the second threshold value 12c set in advance for each of the liquid tanks 2 to 6 (step S24: YES), the operation control unit 11b controls to restart the operation of the drive unit 35 (step S25).

According to the present embodiment as described above, after the operation of the drive unit 35 is stopped by the liquid level monitoring unit 11a, the amount of periodic fluctuation of the liquid level of all the liquid tanks 2 to 6 is changed to the liquid tanks 2 to 6. By detecting that the second threshold value is smaller than the predetermined second threshold value 12c for each time, it is possible to detect that the earthquake has subsided and the sloshing has been completed without using a special device. Then, when the liquid level monitoring unit 11a detects the convergence of such liquid level fluctuations, the operation control unit 11b restarts the operation of the drive unit 35, so that the operation of the pump equipment 1 is safe at the end of the earthquake. It will be possible to restart automatically.

<Example of diagnostic method for pump equipment>
Next, an example of a diagnostic method for pump equipment by the diagnostic device 20 for pump equipment will be described with reference to FIG. FIG. 10 is a flowchart 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 the measurement values of the liquid levels of the liquid tanks 2 to 6 from the pump equipment 1 as the tendency management data 22a, and the storage unit 22 (Step S30).

During the operation of the drive machine 35 of the pump equipment 1, the data collecting unit 21a simultaneously sets the liquid levels of the two or more liquid tanks 2 to 6 to the first threshold value 12b set in advance for each of the liquid tanks 2 to 6. It is determined whether or not the fluctuation exceeds the periodic value (step S31).

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

When the fluctuation cycle of the liquid level of the liquid tanks 2 to 6 of two or more tanks matches the natural cycle of the liquid level fluctuation of each of the liquid tanks 2 to 6 generated by the earthquake (step S32: YES), the data collection unit. 21a excludes the measurement data at that time from the tendency management data 22a stored in the storage unit 22 (step S33).

It should be noted that step S32 is not always indispensable, and the liquid levels of the two or more liquid tanks 2 to 6 simultaneously fluctuate periodically exceeding the first threshold value 12b set in advance for each of the liquid tanks 2 to 6. When is detected (step S31: YES), step S32 is omitted, and the data collection unit 21a excludes the measurement data at that time from the tendency management data 22a stored in the storage unit 22. It may be (step S33).

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

According to the present embodiment as described above, the data collecting unit 21a determines the liquid levels of the two or more liquid tanks 2 to 6 at the same time for each of the liquid tanks 2 to 6 while the drive machine 35 is operating. By detecting that the fluctuation exceeds the first threshold value 12b, the occurrence of an earthquake can be detected without using a special device. Then, when the data collection unit 21a detects such a fluctuation in the liquid level, the data at that time is excluded from the tendency 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 (estimation of failure occurrence time and guideline for replacement / repair) in the trend management unit 21b, and it is possible to improve the reliability of the diagnostic device 20.

Although the embodiments and modifications of the present invention have been described above by way of examples, the scope of the present invention is not limited to these, and the invention may be modified or modified according to an object within the scope described in the claims. Is possible. In addition, each embodiment and modification can be appropriately combined as long as the contents do not contradict each other.

Further, the monitoring control device 10 according to the present embodiment may be composed of one or a plurality of computers, but a program for realizing the monitoring control device 10 on one or a plurality of computers and a recording medium on which the program is recorded. Is also subject to protection in this case.

Further, the pump equipment diagnostic device 20 according to the present embodiment may be composed of one or a plurality of computers, and a program for realizing the pump equipment diagnostic device 20 on one or a plurality of computers and the program thereof. The recorded recording medium is also subject to protection in this case.

1 Pump equipment 2 Suction water tank 2w Liquid level measuring instrument 3 Discharging water tank 3w Liquid level measuring instrument 4 Fuel oil storage tank 4w Liquid level measuring instrument 4a Fuel pump 5 Fuel dispensing tank 5w Liquid level measuring instrument 6 Cooling water tank 6a Cooling water pump 6w Liquid Position measuring instrument 10 Monitoring control device 11 Control unit 11a Liquid level monitoring unit 11b Operation control unit 12 Storage unit 12a Database 12b that stores the natural period of liquid level fluctuation caused by an earthquake 12b First threshold 12c Second threshold 13 Input unit 14 Output unit 15 Communication unit 20 Diagnostic device for pump equipment 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 External bearing 32t Thermometer 33 Impeller 34 Reducer 35 Driver 35t Thermometer 35n Rotator 36 Cooler 36t Thermometer 36p Pressure gauge 37 Starting air tank 38 Cooler 38t Thermometer 71 Outside water river (main river)
72 Inland river (tributary)
73 Natural flow sluice gate 74 Drainage gutter pipe

Claims (23)

Pump equipment that uses an internal combustion engine as the main pump drive
With multiple liquid tanks for storing or supplying liquids to equipment,
A plurality of liquid level measuring instruments provided in the plurality of liquid tanks and measuring the liquid level of each liquid tank, and
A monitoring control device that monitors the amount of fluctuation in 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
The monitoring control device is described when the liquid levels of two or more liquid tanks simultaneously and periodically fluctuate beyond a first threshold value predetermined for each liquid tank during the operation of the drive machine. Controls to stop the operation of the drive unit,
Pump equipment that is characterized by that. In the monitoring control device, the amount of periodic fluctuations in the liquid levels of all the liquid tanks in which the liquid level periodically fluctuates beyond the first threshold value after the operation of the drive unit is stopped and before the operation of the drive unit is stopped. However, when it becomes smaller than the second threshold value set in advance for each liquid tank, the operation of the driving machine is controlled to be restarted.
The pump equipment according to claim 1. The monitoring control device has a database in which the natural period of the liquid level fluctuation for each liquid tank generated by an earthquake is stored in advance.
The monitoring control device is a case where the liquid levels of two or more liquid tanks simultaneously and periodically fluctuate beyond a first threshold value predetermined for each liquid tank during the operation of the drive machine. When the fluctuation cycle of the liquid level of the two or more liquid tanks matches the natural cycle of each liquid tank stored in the database, the operation of the drive machine is controlled to be stopped.
The pump equipment according to claim 1 or 2. The monitoring control device can communicate with the monitoring control device of other pump equipment installed in the same site or in the same area via a network.
The monitoring and control device notifies the monitoring and control device of the other pumping equipment of the occurrence status of the liquid level fluctuation of each liquid tank of the pumping equipment during the operation of the driving machine, and monitors the other pumping equipment. Based on the occurrence status of the liquid level fluctuation of each liquid tank of the other pump equipment notified from the control device, the control or the alarm for stopping the operation of the drive of the pump equipment is issued.
The pump equipment according to any one of claims 1 to 3. Pump equipment that uses an internal combustion engine as the main pump drive
With multiple liquid tanks for storing or supplying liquids to equipment,
A plurality of liquid level measuring instruments provided in the plurality of liquid tanks and measuring the liquid level of each liquid tank, and
A monitoring control device that monitors the amount of fluctuation in 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
The monitoring control device drives the drive when the periodic fluctuation amount of the liquid level in all the liquid tanks becomes smaller than the second threshold value predetermined for each liquid tank after the operation of the drive unit is stopped. Control to restart the operation of the aircraft,
Pump equipment that is characterized by that. 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 claims 1 to 5 as trend management data.
A tendency management unit that diagnoses deterioration or failure signs of the pump equipment based on the tendency management data,
With
When the liquid level of two or more liquid tanks simultaneously fluctuates beyond the first threshold value set in advance for each liquid tank during the operation of the drive machine, the data collection unit periodically fluctuates. A diagnostic device for pump equipment, characterized in that the measurement data at that time is excluded from the trend management data. A monitoring and control device for pump equipment that uses an internal combustion engine as the drive for the main pump.
The amount of fluctuation in the liquid level of each liquid tank is determined based on the measured values of multiple liquid level measuring instruments provided in multiple liquid tanks for storing or supplying liquid to the equipment and measuring the liquid level of each liquid tank. The liquid level monitoring unit to be monitored and
During the operation of the drive machine, the liquid level monitoring unit detects that the liquid levels of two or more liquid tanks simultaneously and periodically fluctuate beyond a first threshold value predetermined for each liquid tank. When this is done, an operation control unit that controls to stop the operation of the drive unit and
A monitoring and control device characterized by being equipped with. After the operation of the drive unit is stopped, the operation control unit periodically fluctuates the liquid level beyond the first threshold value by the liquid level monitoring unit before the operation of the drive unit is stopped. When it is detected that the periodic fluctuation amount of the position becomes smaller than the second threshold value set in advance for each liquid tank, the operation of the driving machine is controlled to be restarted.
The monitoring control device according to claim 7. It also has a database in which the natural period of liquid level fluctuation for each liquid tank generated by an earthquake is stored in advance.
During the operation of the drive machine, the operation control unit periodically exceeds the first threshold value set in advance for each liquid tank at the same time by the liquid level monitoring unit. When the fluctuation cycle of the liquid level of the two or more liquid tanks coincides with the natural cycle of each liquid tank stored in the database, the driving machine Control to stop operation,
The monitoring control device according to claim 7 or 8. It is further equipped with a communication unit that can communicate via a network with the monitoring and control devices of other pump equipment installed on the same site or in the same area.
The operation control unit notifies the monitoring and control device of the other pump equipment via the communication unit of the occurrence status of the liquid level fluctuation of each liquid tank of the pump equipment during the operation of the drive, and also, the operation control unit. The operation of the drive unit of the pump equipment is stopped based on the occurrence status of the liquid level fluctuation of each liquid tank of the other pump equipment notified from the monitoring control device of the other pump equipment via the communication unit. Control or issue an alarm,
The monitoring control device according to any one of claims 7 to 9. A monitoring and control device for pump equipment that uses an internal combustion engine as the drive for the main pump.
The amount of fluctuation in the liquid level of each liquid tank is determined based on the measured values of multiple liquid level measuring instruments provided in multiple liquid tanks for storing or supplying liquid to the equipment and measuring the liquid level of each liquid tank. The liquid level monitoring unit to be monitored and
After the operation of the drive is stopped, the liquid level monitoring unit detects that the periodic fluctuation amount of the liquid level in all the liquid tanks becomes smaller than the second threshold value predetermined for each liquid tank. In such a case, an operation control unit that controls to restart the operation of the drive unit and
A monitoring and control device characterized by being equipped with. A monitoring and control method for pump equipment that uses an internal combustion engine as the main pump drive.
The amount of fluctuation in the liquid level of each liquid tank is determined based on the measured values of multiple liquid level measuring instruments provided in multiple liquid tanks for storing or supplying liquid to the equipment and measuring the liquid level of each liquid tank. Steps to monitor and
During the operation of the drive, if the liquid levels of two or more liquid tanks simultaneously change periodically exceeding the first threshold value set in advance for each liquid tank, the operation of the drive is stopped. Steps to do and
A monitoring and control method comprising. After the operation of the drive machine is stopped and before the operation of the drive machine is stopped, the amount of periodic fluctuation of the liquid level of all the liquid tanks whose liquid level fluctuates beyond the first threshold value is determined for each liquid tank. A step of restarting the operation of the driving machine when the threshold value becomes smaller than a predetermined second threshold value.
The monitoring control method according to claim 12, further comprising. In the step of stopping the operation of the drive machine, the liquid levels of two or more liquid tanks simultaneously change periodically exceeding the first threshold value set in advance for each liquid tank during the operation of the drive machine. In this case, the fluctuation cycle of the liquid level of the two or more liquid tanks is unique to each liquid tank stored in the database in which the natural cycle of the liquid level fluctuation for each liquid tank generated by the earthquake is stored in advance. When the cycle matches, the operation of the drive is stopped.
The monitoring control method according to claim 12 or 13. During the operation of the drive, the occurrence status of liquid level fluctuations in each liquid tank of the pump equipment is notified to the monitoring and control devices of other pump equipment installed in the same site or in the same area via a network. , The operation of the drive unit of the pump equipment is stopped based on the occurrence status of the liquid level fluctuation of each liquid tank of the other pump equipment notified from the monitoring control device of the other pump equipment via the network. , Or issue an alarm, step,
The monitoring control method according to any one of claims 12 to 14, further comprising. A monitoring and control method for pump equipment that uses an internal combustion engine as the main pump drive.
The amount of fluctuation in the liquid level of each liquid tank is determined based on the measured values of multiple liquid level measuring instruments provided in multiple liquid tanks for storing or supplying liquid to the equipment and measuring the liquid level of each liquid tank. Steps to monitor and
After the operation of the drive is stopped, when the periodic fluctuation amount of the liquid level in all the liquid tanks becomes smaller than the second threshold value predetermined for each liquid tank, the operation of the drive is restarted. Steps and
A monitoring and control method comprising. On the computer
In pump equipment whose main pump is an internal combustion engine, the measured values of a plurality of liquid level measuring instruments provided in a plurality of liquid tanks for storing or supplying liquid to the equipment and measuring the liquid level of each liquid tank. And the step of monitoring the fluctuation amount of the liquid level in each liquid tank based on
During the operation of the drive, if the liquid levels of two or more liquid tanks simultaneously change periodically exceeding the first threshold value set in advance for each liquid tank, the operation of the drive is stopped. Steps to do and
A monitoring and control program characterized by executing. On the computer
After the operation of the drive machine is stopped and before the operation of the drive machine is stopped, the amount of periodic fluctuation of the liquid level of all the liquid tanks whose liquid level fluctuates beyond the first threshold value is determined for each liquid tank. A step of restarting the operation of the driving machine when the threshold value becomes smaller than a predetermined second threshold value.
The monitoring control program according to claim 17, wherein the monitoring and control program is further executed. In the step of stopping the operation of the drive machine, the liquid levels of two or more liquid tanks simultaneously change periodically exceeding the first threshold value set in advance for each liquid tank during the operation of the drive machine. In this case, the fluctuation cycle of the liquid level of the two or more liquid tanks is unique to each liquid tank stored in the database in which the natural cycle of the liquid level fluctuation for each liquid tank generated by the earthquake is stored in advance. When the cycle matches, the operation of the drive is stopped.
The monitoring control program according to claim 17 or 18. On the computer
During the operation of the drive, the occurrence status of liquid level fluctuations in each liquid tank of the pump equipment is notified to the monitoring and control devices of other pump equipment installed in the same site or in the same area via a network. , The operation of the drive unit of the pump equipment is stopped based on the occurrence status of the liquid level fluctuation of each liquid tank of the other pump equipment notified from the monitoring control device of the other pump equipment via the network. , Or issue an alarm, step,
The monitoring control program according to any one of claims 17 to 19, wherein the monitoring control program is further executed. On the computer
In pump equipment whose main pump is an internal combustion engine, the measured values of a plurality of liquid level measuring instruments provided in a plurality of liquid tanks for storing or supplying liquid to the equipment and measuring the liquid level of each liquid tank. And the step of monitoring the fluctuation amount of the liquid level in each liquid tank based on
After the operation of the drive is stopped, when the periodic fluctuation amount of the liquid level in all the liquid tanks becomes smaller than the second threshold value predetermined for each liquid tank, the operation of the drive is restarted. Steps and
A monitoring and control program characterized by executing. A step of collecting time-series measurement data including measured values of the liquid level of each liquid tank from the pump equipment according to any one of claims 1 to 5 as trend management data, and
Based on the trend management data, the step of diagnosing the deterioration or failure sign of the pump equipment, and
Including
In the step of collecting the time-series measurement data as trend management data, the liquid levels of two or more liquid tanks simultaneously exceed the first threshold value set in advance for each liquid tank during the operation of the drive machine. A diagnostic method for pump equipment, which comprises excluding the measurement data at that time from the trend management data when it fluctuates periodically. On the computer
A step of collecting time-series measurement data including measured values of the liquid level of each liquid tank from the pump equipment according to any one of claims 1 to 5 as trend management data, and
Based on the trend management data, the step of diagnosing the deterioration or failure sign of the pump equipment, and
It is a diagnostic program for pump equipment that executes
In the step of collecting the time-series measurement data as trend management data, the liquid levels of two or more liquid tanks simultaneously exceed the first threshold value set in advance for each liquid tank during the operation of the drive machine. A diagnostic program for pump equipment, which is characterized by excluding the measurement data at that time from the trend management data when it fluctuates periodically.

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