JP2017036669A - Control device, control method and pump station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce burden on a worker engaging in inspection, and improve accuracy of detecting abnormality or misdetection of measuring instruments.SOLUTION: A control device is used in a pump station that has a plurality of pumps provided in parallel and configured to pump up water from a suction side and discharge pumped-up water. The control device includes: a control unit that determines availability of operating the pumps, presence/absence of abnormality or a broken place by using measurement values measured by measuring instruments provided in the pump station; and a determination unit that determines abnormality of the measuring instrument or presence/absence of misdetection on the basis of measurement values, which should indicate the same value even when a water level on the suction side is changed, measured by three or more measuring instruments.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a control device, a control method, and a pump station.

  The pump station has various measuring instruments such as a water level gauge, pressure gauge, ammeter, and flow meter to control the operation of the pump. During the operation of the pump, the measured value of the water level gauge on the suction side of the pump is used to determine whether the pump is operating or stopped. Moreover, the operation control of a pump and the presence or absence of a failure are judged using measured values, such as a pressure gauge which measures the discharge pressure of a pump, or a flow meter which measures the amount of water in a pump. On the other hand, when the pump is stopped, it is determined whether or not to start the operation of the pump using the measured value of the water level meter on the suction side of the pump.

  However, when there is an abnormality or a false detection in these measuring instruments, the pump is operated or stopped at an unexpected water level. In addition, there is a problem that the pump is determined to be out of order even though the pump is not out of order, and the equipment at the pump station is stopped. In order to prevent such an abnormality or false detection of the measuring instrument, the operation manager confirms whether an abnormality has occurred in these measuring instruments in daily inspection.

  In recent pump facilities, the number of facilities that perform unattended operation by automatic control is increasing. In such a facility, sufficient accuracy is required for abnormality or false detection of a measuring instrument that measures each state quantity. In particular, an abnormality or false detection of a water level meter that measures the water level on the suction side of the pump, which determines the stoppage of the pump, causes a delay in drainage or an operation at a water level that should not be operated. Or sufficient accuracy is required for false detection.

  As an example of a technique related to failure detection of a conventional measuring instrument, Patent Document 1 discloses a water level meter that continuously detects a liquid level according to the change, and a plurality of rows arranged at intervals in the height direction. A liquid level detector that has a liquid level detector and detects the liquid level in stages by each liquid level detector, and compares the liquid level detected by the water level gauge with the liquid level detected by the liquid level detector. A failure detection device is disclosed that includes a determination unit that outputs a failure signal according to the comparison result.

Japanese Utility Model Publication No. 62-49727

  In the technique of Patent Document 1, if the liquid level is changed, a fault signal is output when the water level gauge detects an incorrect water level at the changed liquid level, so that it is understood that the water level gauge is faulty. . However, it is difficult to manually change the water level on the suction side of the pump by operating the pump even though it is not necessary to drain the water in the daily inspection at the actual site. For this reason, it is difficult to check whether the water level gauge is operating normally regardless of the water level on the suction side of the pump. Similarly, in an actual daily inspection, it is difficult to change the state quantities such as the discharge pressure of the pump and the bearing temperature of the speed reducer by operating the pump without draining. For this reason, when the pump is operated, it is difficult to check whether the measuring device is operating normally with the state quantity of the device installed in the pump station such as the pump and the speed reducer.

  In the technique of Patent Document 1, since the liquid level detector detects the liquid level level step by step, the detection accuracy becomes one step, and thus the detection accuracy is not sufficient. In addition, since there are a large number of measuring instruments and various types of measuring instruments in the pump station, there is a problem that the burden on the operator for inspection is large and the reliability of the inspection is not so high.

  The present invention has been made in view of the above problems, and a control device and a control capable of improving the accuracy of detection of abnormality or false detection of a measuring instrument while reducing the burden on an operator involved in inspection The object is to provide a method and pump station.

  The control device according to one aspect of the present invention uses a measurement value measured by a measuring instrument provided in the pump station, and is provided in parallel with the pump station and pumps water from the suction side and pumps it to the discharge side. Measured values measured by each of three or more measuring instruments that should show the same value even when the water level on the suction side changes while the pump is operating, and a control unit that controls a plurality of pumps And a determination unit that determines whether there is an abnormality or erroneous detection of the measuring instrument.

  As a result, even if the pump operates and the water level on the suction side changes or the water level on the suction side changes, each measuring instrument that should show the same value shows the same measured value. When a measured value different from one or more measuring instruments is indicated, it can be determined that the measuring instrument is abnormal or erroneously detected. For this reason, it is possible to improve the accuracy of detection of abnormality or false detection of the measuring instrument. In addition, since the control device determines whether there is an abnormality or false detection of the measuring instrument, the operator involved in the inspection does not have to check the abnormality or erroneous detection of the measuring instrument one by one. The burden on the operator can be reduced.

  In the control device according to one aspect of the present invention, the plurality of pumps have the same structure and the suction ports of the pumps have substantially the same height, and the water tanks on the suction side of the pumps are connected to each other. The determination unit is configured to detect an abnormality or error of the measuring instrument based on a measurement value measured while the pump is operated by each measuring instrument that measures the same kind of state quantity for the same kind of device to be measured. The presence or absence of detection is determined.

  Thereby, since the water tanks on the suction side of each pump are connected to each other, the water level on the suction side of each pump becomes substantially the same. Under these conditions, if multiple pumps that have the same structure and the pump suction port height is substantially the same, the measured values of the same type of measuring instrument are the same for the same type of device under measurement. Indicates the value of. For this reason, when one measuring instrument shows a measured value different from two or more other measuring instruments, it can be determined that the measuring instrument is abnormal or misdetecting. Accordingly, it is possible to improve the accuracy of detection of abnormality or false detection of the measuring instrument.

  In the control device according to one aspect of the present invention, the water tanks on the suction side of each of the pumps are connected to each other, and the determination unit measures the water level on the suction side while the pump is operating. Based on the water level measured by each meter, the presence or absence of an abnormality or false detection of the measuring instrument is determined.

  Thereby, since the water tanks on the suction side of each pump are connected to each other, the water level on the suction side of each pump becomes substantially the same. For this reason, when one water level meter shows a measured value different from two or more other water level meters, it can be determined that the water level meter is abnormal or erroneously detected.

  In the control device according to an aspect of the present invention, when the determination unit determines that there is an abnormality or erroneous detection of the measuring instrument, the measuring instrument or erroneous detection having an abnormality is based on three or more measurement values. Identify the instrument that performed the check.

  Thereby, since the operator who concerns on an inspection can grasp | ascertain the measuring device which has abnormality, or the measuring device which performed the false detection, the burden of the operator who concerns on an inspection can be reduced.

  In the control device according to an aspect of the present invention, the pump station is provided with a continuous water level meter that continuously measures the water level on the suction side, and the water level on the suction side that is provided according to each of the pumps. A step-type water level meter is provided, and the determination unit determines a normal water level width that matches at least two water level widths from the water level width detected by each of the step-type water level meters, and measures the continuous water level meter By comparing the value with the normal water level width, it is determined whether or not the continuous water level gauge is abnormal or erroneously detected.

  As a result, the normal water level width is defined as the water level width in which at least two water level widths detected by the electrode type water level gauges provided corresponding to each pump match, so that the correct water level width can be set to the normal water level width. it can. Then, by comparing the water level detected by the continuous water level gauge with the normal water level width that is determined to be correct, it is possible to accurately determine whether the continuous water level gauge is abnormal or erroneously detected.

  In the control device according to an aspect of the present invention, the pump station is provided with a plurality of continuous water level meters that continuously measure the water level on the suction side, and the control unit controls the pump by the determination unit. When it is determined that the continuous water level meter used in the above is abnormal or erroneously detected, the pump is controlled using the measured value of the continuous water level meter other than the continuous water level meter.

  In this way, even when one continuous water level gauge is clogged with dust and one continuous water level gauge causes a false detection, the control unit can measure the measured value of another normal continuous water level gauge. Use to switch to control the pump. Thereby, since operation can be continued even if one continuous water level gauge causes a false detection, the reliability as equipment can be improved.

  In the control device according to one aspect of the present invention, the pump station is provided corresponding to each of the driving machines that operate the pump and measures an electric current supplied to the driving machine, and corresponds to each of the pumps. A pressure gauge that measures the discharge pressure of the pump is provided, and the determination unit measures the ammeter when the pump is operating with the drainage of the pump stopped. Using the measured value and the pressure value measured by the pressure gauge, the presence or absence of abnormality or deterioration of the corresponding pump is determined.

  Thereby, since the presence or absence of abnormality or deterioration of the pump can also be detected, it is possible to reduce the burden on the operator related to the inspection.

  A control method according to one aspect of the present invention is a control method used in a pump station having a plurality of pumps provided in parallel and pumping water from a suction side and discharging water drawn to a discharge side. Using the measurement value measured by the measuring instrument provided in the pump, using the measurement value measured by the measuring instrument provided in the pump station, determining whether the pump can be operated, whether there is an abnormality, or a failure location And while the pump is operating, based on the measured values measured by each of three or more measuring instruments that should show the same value even if the water level on the suction side changes, an abnormality or false detection of the measuring instrument And determining the presence or absence of.

  As a result, even if the pump operates and the water level on the suction side changes or the water level on the suction side changes, each measuring instrument that should show the same value shows the same measured value. When a measured value different from one or more measuring instruments is indicated, it can be determined that the measuring instrument is abnormal or erroneously detected. For this reason, it is possible to improve the accuracy of detection of abnormality or false detection of the measuring instrument. In addition, since the control device determines whether there is an abnormality or false detection of the measuring instrument, the operator involved in the inspection does not have to check the abnormality or erroneous detection of the measuring instrument one by one. The burden on the operator can be reduced.

  The pump station according to one aspect of the present invention is provided in parallel and has a plurality of pumps that pump water from the suction side and discharge water pumped to the discharge side, and shows the same value even if the water level on the suction side changes. Three or more measuring devices and a control device, and the control device uses the measurement values measured by the measuring device to control the plurality of pumps, and the pump operates. A determination unit that determines whether the measuring instrument is abnormal or erroneously detected based on the measured values measured by the three or more measuring instruments.

  As a result, even if the pump operates and the water level on the suction side changes or the water level on the suction side changes, each measuring instrument that should show the same value shows the same measured value. When a measured value different from one or more measuring instruments is indicated, it can be determined that the measuring instrument is abnormal or erroneously detected. For this reason, it is possible to improve the accuracy of detection of abnormality or false detection of the measuring instrument. In addition, since the control device determines whether there is an abnormality or false detection of the measuring instrument, the operator involved in the inspection does not have to check the abnormality or erroneous detection of the measuring instrument one by one. The burden on the operator can be reduced.

  In the present invention, even if the pump operates and the water level on the suction side changes, the measuring instruments that should show the same value even if the water level on the suction side changes, show the same measured value, so one measuring instrument is the other When a measured value different from two or more measuring instruments is indicated, it can be determined that the measuring instrument is abnormal or erroneously detected. For this reason, it is possible to improve the accuracy of detection of abnormality or false detection of the measuring instrument. In addition, since the control device determines whether there is an abnormality or false detection of the measuring instrument, the operator involved in the inspection does not have to check the abnormality or erroneous detection of the measuring instrument one by one. The burden on the operator can be reduced.

It is a schematic plan view of the pump station according to the first embodiment. It is an example of sectional drawing of No. 1 machine of a pump station. It is sectional drawing which shows an example of the electrode type water level meter which concerns on 1st Embodiment. It is a block diagram which shows the structure of the control apparatus which concerns on 1st Embodiment. It is a flowchart which shows an example of the process of the determination using the pressure value of a pressure gauge. It is a flowchart which shows an example of the process of the determination using the water level width by the electrode type water level gauge which concerns on 1st Embodiment. It is the example which plotted the measured value of the measuring device which measures the same kind of state quantity about the same kind of to-be-measured object for every time. It is a schematic plan view of the pump station which concerns on 2nd Embodiment. It is a flowchart which shows an example of the process of the abnormality or deterioration determination of the pump which concerns on 3rd Embodiment.

  Each embodiment will be described below with reference to the drawings.

<First Embodiment>
FIG. 1 is a schematic plan view of a pump station 101 according to the first embodiment. As shown in FIG. 1, the pump station 101 includes a first pump unit (hereinafter referred to as “unit 1”) PU1, a second pump unit (hereinafter referred to as “unit 2”) PU2, and a third pump unit (hereinafter referred to as “unit 3”). PU3, suction water tanks ST1, ST2, ST3 and a discharge water tank DT. Further, the pump station 101 includes a first continuous water level meter provided upstream of the suction side rivers from the screens SR1, SR2, SR3, screen SR1 provided upstream of the suction side rivers from the suction water tanks ST1, ST2, ST3. A second continuous water level gauge CWG2 provided in the CWG1 and the discharge water tank DT is provided. Furthermore, the pump station 101 includes a control device CON and a display device DP connected to the control device CON. Since the suction water tanks ST1, ST2, and ST3 are provided to be connected to the suction-side river, the water levels of the suction water tanks ST1, ST2, and ST3 are substantially the same.

The screens SR1, SR2, SR3 are provided with a plurality of gaps in order to remove relatively large dust that impedes the rotation of the impellers of the pumps PP1, PP2, PP3 described later.
The first continuous water level meter CWG1 continuously measures the water levels in the suction water tanks ST1, ST2, and ST3. The first continuous water level meter CWG1 is, for example, a pressure type water level meter, a radio wave type water level meter, or an ultrasonic water level meter.
The second continuous water level gauge CWG2 continuously measures the water level in the discharge water tank DT. The second continuous water level gauge CWG2 is, for example, a pressure type water level gauge, a radio wave type water level gauge, or an ultrasonic water level gauge.

  The first machine PU1, the second machine PU2, and the third machine PU3 are respectively the reduction gears RD1, RD2, RD3 and the corresponding reduction gears connected to the output shafts of the driving devices DM1, DM2, DM3 and the corresponding driving devices DM1, DM2, DM3. Pumps PP1, PP2, PP3 connected to RD1, RD2, RD3 and having the same structure are provided. Here, the pump having the same structure according to the present embodiment has the same shaft type, the same shape of the impeller, the suction side diameter is substantially the same, and the discharge side diameter is substantially the same. It means something. The types of shaft include, for example, a horizontal axis and a vertical axis, and the shape of the impeller includes, for example, diagonal flow and axial flow. The pumps PP1, PP2, and PP3 are provided in parallel to the pump station 101 and pump water from the suction side and discharge the pumped water to the discharge side.

  In addition, the first machine PU1, the second machine PU2, and the third machine PU3 are respectively current meters CS1, CS2, and CS3 that measure the current value of the current supplied to the drive machine, and thermometers TS11 and TS21 that measure the bearing temperature of the speed reducer. , TS31, thermometers TS12, TS22, TS32 for measuring the lubricating oil temperature of the speed reducer are provided. In addition, the first unit PU1, the second unit PU2, and the third unit PU3 are arranged in the suction water tanks ST1, ST2, and ST3, respectively, adjacent to the pressure gauges PS1, PS2, and PS3 and the pumps PP1, PP2, and PP3 that measure the discharge pressure. Electrode-type water level gauges EWG1, EWG2, and EWG3. The pumps PP1, PP2, and PP3 are provided with discharge valves MD1, MD2, and MD3 for blocking the water flow and adjusting the discharge flow rate, respectively.

The driving machines DM1, DM2, and DM3 each have an output shaft, and rotate the output shaft using the supplied current. The driving machines DM1, DM2, and DM3 are, for example, electric motors. The driving machines DM1, DM2, and DM3 may be diesel engines or gas turbines.
The reduction gears RD1, RD2, and RD3 each have a rotation shaft, and rotate the rotation shaft by decelerating the rotations transmitted from the corresponding driving devices DM1, DM2, and DM3, respectively.

Each of the pumps PP1, PP2, PP3 sucks the water that has flowed into the suction water tanks ST1, ST2, ST3 connected to each other, and sends the sucked water to the discharge water tank DT. The discharge water tank DT is connected to the discharge-side river.
FIG. 2 is an example of a cross-sectional view of Unit 1 of the pump station 101. Since Units 2 and 3 have the same configuration as Unit 1, only Unit 1 will be described here as a representative. As shown in FIG. 2, the pump PP1 in the present embodiment is a horizontal axis diagonal flow pump as an example, and the inlet of the suction pipe SP1 (hereinafter referred to as the suction port) of the pump PP1 is a position below the water surface of the suction water tank ST1. The pumped water sucked into the pump PP1 reaches the discharge water tank DT via the discharge pipe DP1. In the present embodiment, the pumps PP1, PP2, and PP3 are installed so that the suction ports of the pumps PP1, PP2, and PP3 have substantially the same height.

  An impeller (not shown), which is a main rotating part of the horizontal shaft mixed flow pump, is arranged in the pump casing above the suction water tank ST1, and is connected to a rotating shaft inserted and sealed from the outside of the casing. Pumping by rotation. The rotating shaft extends in the horizontal direction through the pump casing, and one end is connected to the impeller, and the other end passes through the pump casing and is connected to the speed reducer RD1 outside the casing.

In addition, the first unit PU1, the second unit PU2, and the third unit PU3 are respectively connected to the pumps PP1, PP2, and PP3 via piping, the electric motor EM that is connected to the vacuum pump NV and operates the vacuum pump, and the above piping The full water detection part FD arrange | positioned in this and the valve MS provided in the said piping are provided.
For example, the full water detection unit FD of Unit 1 notifies that the inside of the pump PP1 is full. For example, when the water level in the suction water tank ST1 is equal to or higher than the starting water level, the air in the pump PP1 is discharged by the vacuum pump NV, the liquid level in the pump PP1 is raised from the suction side, and the pump PP1 is filled with water. A fill operation is performed. At this time, the full water detection unit FD notifies that the pump PP1 is full when the inside of the pump PP1 is full.

  The electrode type water level gauges EWG1, EWG2, and EWG3 measure the suction water tanks ST1, ST2, and ST3 in a discontinuous manner, respectively. The electrode type water level gauges EWG1, EWG2, and EWG3 are used for confirming the startable water level, and are used in place of the first continuous water level gauge CWG1 when the first continuous water level gauge CWG1 fails.

FIG. 3 is a cross-sectional view showing an example of an electrode-type water level meter according to the present embodiment. As shown in FIG. 3, the electrode-type water level gauges EWG1, EWG2, and EWG3 include an electrode WL0, an electrode WL1, an electrode WL2, an electrode WL3, and an electrode WL4. In the case of FIG. 3, since the water level is above the tip of the electrode WL2 and below the tip of the electrode WL3, the detected water level width of this electrode type water level gauge is the water level width of WL2 to WL3.
In the present embodiment, an electrode type water level gauge is used, but other stage type water level gauges that measure the water level in stages, such as a friction type water level gauge, may be used.

Returning to FIG. 1, the display device DP displays in accordance with a command from the control device CON. The display device DP according to the present embodiment is a display board as an example.
The control device CON includes a first continuous water level meter CWG1, a second continuous water level meter CWG2, an electrode type water level meter EWG1, EWG2, EWG3, an ammeter CS1, CS2, CS3, a thermometer TS11, TS21, TS31, and a temperature. Connected to the gauges TS12, TS22, TS32 and pressure gauges PS1, PS2, PS3, and obtains the respective measured values.

The control device CON monitors the measurement values of the various measuring instruments described above, and uses these measurement values to determine whether the pumps PP1, PP2, PP3 can be operated, whether there is an abnormality, and where the failure has occurred. As described above, the control device CON monitors the state of all the pumps PP1, PP2, and PP3 installed in the pump station 101, and the operator who manages the pump station 101 grasps the operation state and failure state of the pump. Determine which pump to run or stop.
In addition, the control device CON displays the operating status, the presence / absence of an abnormality, the failure location, etc. on the display panel of the display device DP. Further, the control device CON controls the discharge valves MD1, MD2, and MD3.

  For example, the control device CON controls the driving machines DM1, DM2, and DM3 using these measurement values. For example, when the flow rate of the suction side river increases and the water level of the suction water tanks ST1, ST2, ST3 rises above a predetermined threshold water level, the control device CON supplies current to the drivers DM1, DM2, DM3. The output shafts of the driving machines DM1, DM2, and DM3 are rotated. As a result, the rotation is transmitted to the impellers of the pumps PP1, PP2, and PP3 via the speed reducers RD1, RD2, and RD3, and the pumps PP1, PP2, and PP3 suck in water from the suction water tanks ST1, ST2, and ST3 and enter the discharge water tank DT. Send water. Thereby, the water sent to the discharge water tank DT flows out to the discharge side river. In this way, water can be moved from the suction side river to the discharge side river.

FIG. 4 is a block diagram illustrating a configuration of the control device according to the present embodiment. As shown in FIG. 4, the control device CON includes an input unit 1, a RAM (Random Access Memory) 2, a storage unit 3, an output unit 4, and a CPU (Central Processing Unit) 5. Each unit is connected to each other via a bus.
The input unit 1 receives the measurement values of the various measuring instruments described above. The RAM 2 temporarily stores information. The storage unit 3 stores a program for the CPU 5 to read and execute. The output unit 4 is connected to the display device DP and outputs a signal to the display device DP in accordance with a command from the CPU 5 to output sound (for example, a buzzer sound). The CPU 5 operates as the control unit 51, the determination unit 52, and the output control unit 53 by reading and executing the program stored in the storage unit 3.

The control unit 51 monitors the measurement values of the various measuring instruments described above. The control unit 51 determines whether or not the pumps PP1, PP2, and PP3 can be operated, whether there is an abnormality, or a failure location by using measurement values measured by a measuring instrument provided in the pump station 101.
Specifically, for example, the control unit 51 determines the presence / absence of an abnormality in the driving devices DM1, DM2, and DM3 using the current values of the driving devices DM1, DM2, and DM3.
Further, for example, the control unit 51 determines whether or not there is an abnormality in the speed reducers RD1, RD2, and RD3 using the bearing temperature of the speed reducers RD1, RD2, and RD3 and / or the temperature of the lubricating oil.

Further, for example, the control unit 51 operates the pumps PP1, PP2, PP3 using the discharge pressure in the pumps PP1, PP2, PP3 and / or the water level of the suction water tanks ST1, ST2, ST3 and / or the water level of the discharge water tank DT. Whether or not there is an abnormality in the pumps PP1, PP2 and PP3.
The determination unit 52 is provided corresponding to each of the pumps PP1, PP2, PP3, and based on the measurement values measured by each of three or more measuring devices that should show the same value even if the water level on the suction side changes. Determine whether there is any abnormality or false detection of the measuring instrument. Here, the abnormality is an abnormality of the measuring instrument itself. On the other hand, erroneous detection is a state in which the measuring instrument itself is operating normally, but the measuring instrument is clogged with dust and the measured value is incorrect. Specifically, for example, there is a case where dust is clogged around the continuous water level gauge and the continuous water level gauge measures an incorrect value.
The output control unit 53 controls the output unit 4 to cause the output unit 4 to output data representing the operation status, presence / absence of an abnormality, failure location, and the like to the display device DP.

When measuring devices such as electrode-type water level gauges, pressure gauges, ammeters, flowmeters (not shown) installed in Units 1, 2, and 3 are erroneously displayed or misdetected, pumps PP1 and PP2 are used at unplanned water levels. However, there is a problem that the PP3 is operated or stopped, or the pump PP1, PP2, PP3 is stopped because it is determined as a failure even though it is not a failure.
On the other hand, the determination unit 52 according to the present embodiment uses the measurement value measured by the same type of measuring instrument provided corresponding to each of the three or more pumps while the pumps PP1, PP2, and PP3 are operating. Based on this, it is determined whether there is an abnormality in the measured value. If there is no abnormality in the measured value, the operator can determine that these same type of measuring instruments are operating in the normal range, and if the measured value is abnormal, at least one of these same types of measuring instruments is determined. It can be determined that the measuring instrument is abnormal and malfunctioning, or that a false detection has occurred.

  An example of the operation of the control device CON having the above configuration will be described below with reference to FIG. FIG. 5 is a flowchart illustrating an example of determination processing using the pressure value of the pressure gauge. As illustrated in FIG. 5, the control device CON causes the pressure gauges PS1, PS2, and PS3 to detect pressures at timer time intervals, and acquires respective measurement values. Then, the controller CON determines whether or not there is an abnormality or a false detection of the pressure gauges PS1, PS2, PS3 based on the pressure values of these discharge pressures in the pump station 101 where the three pumps PP1, PP2, PP3 are installed. Determine. Hereinafter, a specific description will be given with reference to FIG.

(Step S101) First, the control unit 51 determines whether or not the first machine is operating.
(Step S102) Similarly, in parallel, the control unit 51 determines whether the second machine is operating.
(Step S103) Similarly, in parallel, the control unit 51 determines whether the No. 3 machine is operating.

(Step S104) Next, the control part 51 acquires the measured value P1 of the discharge pressure which the pressure gauge PS1 for Unit 1 measured.
(Step S105) Similarly, in parallel, the control unit 51 obtains the measured value P2 of the discharge pressure measured by the pressure gauge PS2 for Unit 2.
(Step S106) Similarly, in parallel, the control unit 51 obtains the measured value P3 of the discharge pressure measured by the No. 3 pressure gauge PS3.

(Step S107) Next, the determination part 52 calculates the difference of two measured values about all the groups of two measured values which can be taken among these three measured values. Specifically, the determination unit 52 calculates the difference d1 = (P1-P2) between the measurement value P1 and the measurement value P2, calculates the difference d2 = (P2-P3) between the measurement value P2 and the measurement value P3, The difference d3 = (P3-P1) between the measurement value P3 and the measurement value P1 is calculated.
(Step S108) Next, the determination unit 52 determines whether or not each of the obtained differences d1, d2, and d3 is equal to or larger than the allowable error range as a result of the difference calculation. Specifically, the determination unit 52 determines whether the absolute value | d1 | of the difference d1 is greater than or equal to the allowable error α, the absolute value | d2 | of the difference d2 is greater than or equal to the allowable error α, or the absolute value of the difference d3. It is determined whether or not | d3 | Here, it is preferable that the allowable error is set in consideration of the accuracy of the measuring instrument and some variation depending on the operation number. Moreover, it is good also as a structure which the operator who manages the pump station 101 can change the setting of an allowable error from an operation performance.

  (Step S109) In step S108, the absolute value | d1 | of the difference d1 is less than the allowable error α, the absolute value | d2 | of the difference d2 is less than the allowable error α, and the absolute value | d3 | of the difference d3 is the allowable error α. If it is less, the determination unit 52 determines that any pressure gauge is normal. The reason for determining normality is that the pressure values of the three pressure gauges PS1, PS2, and PS3 are substantially equal.

  (Step S110) After step S109, the control unit 51 counts for the timer time, and then the process returns to steps S101 to S103 to obtain the measurement values P1, P2, and P3 in steps S104 to S106, and repeats this. . If the measurement value does not change significantly, such as the water level of a large river, for example, set the timer time to 10 minutes and make a determination once every 10 minutes. The timer time used as the determination timing can be set arbitrarily. Moreover, you may enable it to change the setting of timer time for every measurement value of the same kind, or for every measuring device of the same kind.

  (Step S111) On the other hand, if the absolute value of any difference is equal to or greater than the allowable error in Step S108, the determination unit 52 determines whether the pressure gauge related to the combination that has output a value greater than the allowable error has an abnormality or an error. It is determined that a detection has been made. Specifically, in step S108, the absolute value | d1 | of the difference d1 is greater than or equal to the allowable error α, the absolute value | d2 | of the difference d2 is greater than or equal to the allowable error α, or the absolute value | of the difference d3 | When d3 | is equal to or larger than the allowable error α, the determination unit 52 determines that the measurement value is abnormal. And the determination part 52 specifies the measuring device which has abnormality or misdetected.

Specifically, for example, when the absolute value | d1 | (= | P1-P2 |) of the difference d1 is equal to or larger than the allowable error α, the measured value P1 or P2 is abnormal. At this time, the absolute value | d3 | (= | P3-P1 |) of the difference d3 is equal to or larger than the allowable error α, and the absolute value | d2 | (= | P2-P3 |) of the difference d2 becomes the allowable error α. If not, it is determined that the measured value P1 is abnormal and the measured values P2 and P3 are normal. This determination is made because the measured value P1 is commonly used to calculate | d1 | and | d3 | which are equal to or greater than the allowable error α, and the difference between the measured value P2 and the measured value P3. This is because the absolute value | d2 | of d2 is less than the allowable error α.
In this case, the determination unit 52 determines that the pressure gauge PS1 that has measured the measured value P1 has an abnormality or has been erroneously detected. This is based on the assumption that when a measuring instrument becomes abnormal or erroneously detected, it is unlikely that a plurality of measuring instruments become abnormal or erroneously detected at the same time.

  (Step S112) Next, the output control unit 53 notifies the pressure gauge determined to be abnormal or erroneous detection. For example, the output control unit 53 causes the display device DP to display information indicating a pressure gauge determined to be abnormal or erroneous detection, and causes the output unit 4 to output a buzzer sound.

  In the flowchart of FIG. 5, the discharge pressures of the pumps PP1, PP2, and PP3 are determined. However, the present invention is not limited to this, and the bearing temperature or lubricating oil temperature of the speed reducers RD1, RD2, and RD3, A similar determination may be made for. Further, a fuel oil meter for the driving machine or a thermometer for measuring the temperature of the driving machine may be provided, and the same determination may be performed using these measured values.

  As described above, when the measurement target is the state quantities of the devices to be measured such as the pumps PP1, PP2, PP3, the speed reducers RD1, RD2, RD3, the drive units DM1, DM2, DM3, the pumps PP1, PP2, PP3 are the same. Under the condition that the suction ports of the pumps PP1, PP2 and PP3 have substantially the same structure and the water tanks on the suction sides of the pumps PP1, PP2 and PP3 are connected to each other, It operates as follows. That is, the determination unit 52 is provided corresponding to each of the three or more pumps and while the pumps PP1, PP2, and PP3 are operated by the measuring instruments that measure the same type of state quantity for the same type of device to be measured. Based on the measured value, the presence or absence of an abnormality or false detection of the measuring instrument is determined. Thereby, since the water tanks on the suction side of each pump are connected to each other, the water level on the suction side of each pump becomes substantially the same. Under these conditions, if three or more pumps having the same structure and the pump suction port height are substantially the same, the measured values of the same type of measuring instrument for the same type of device under measurement are Similar values are shown. For this reason, when one measuring instrument shows a measured value different from two or more other measuring instruments, it can be determined that the measuring instrument is abnormal or misdetecting. Accordingly, it is possible to improve the accuracy of detection of abnormality or false detection of the measuring instrument. Note that the suction-side water tanks of the pumps PP1, PP2, and PP3 are connected to each other, not only when the suction water tanks are divided into three as in this embodiment, but also with a single suction water tank. This includes cases where

  Further, another example of the operation of the control device CON will be described below with reference to FIG. FIG. 6 is a flowchart illustrating an example of determination processing using the water level width by the electrode-type water level gauge according to the first embodiment. Here, the pumps PP1, PP2, and PP3 of each unit according to the present embodiment have the same model and specifications as an example, and the length and number of electrodes of the electrode-type water level gauges EWG1, EWG2, and EWG3 are the same. Thereby, since the suction water tanks ST1, ST2, and ST3 are connected, if the electrode type water level meters EWG1, EWG2, and EWG3 are all normal, these detected water levels all indicate the same water level width. In addition, when the electrode type water level meter is not the same model and specification, an abnormality of the water level meter may be detected by increasing the number of electrodes and installing the electrode type with the electrode length of the electrode type water level meter of another machine.

  As shown in FIG. 6, the control unit CON causes the water level gauges EWG1, EWG2, and EWG3 to detect the water level width at the timer time interval, and acquires the detected water level width. Then, the control device CON compares these water level widths, and determines whether there is an abnormality or erroneous detection of the electrode type water level gauges EWG1, EWG2, EWG3. Hereinafter, a specific description will be given with reference to FIG.

(Step S201) First, the control unit 51 detects the water level width (hereinafter referred to as the No. 1 unit detection water level width) by the electrode type water level gauge EWG1 of the No. 1 unit, and acquires the No. 1 unit detection water level width.
(Step S202) Similarly, in parallel, the control unit 51 detects the water level width (hereinafter referred to as “No. 2 unit detection water level width”) by the electrode type water level gauge EWG2 of No. 2 unit, and acquires the No. 2 unit detection water level range.
(Step S203) Similarly, in parallel, the control unit 51 detects a water level width (hereinafter referred to as a No. 3 machine detection water level width) by the No. 3 electrode type water level gauge EWG3, and acquires the No. 3 machine detection water level width.

(Step S204) Next, the determination part 52 determines whether the 1st unit detection water level width, the 2nd unit detection water level width, and the 3rd unit detection water level width are all equal.
(Step S205) In Step S204, when all of the Unit 1 detection water level width, the Unit 2 detection water level width, and the Unit 3 detection water level width are equal, the determination unit 52 determines that any electrode type water level gauge is normal.
(Step S206) After step S205, the control unit 51 counts for the timer time, and then the process returns to steps S201 to S203 to return to the No. 1 unit detection water level width, No. 2 unit detection water level width, and No. 3 unit detection water level width. Get this and repeat. If the measurement value does not change significantly, such as the water level of a large river, for example, set the timer time to 10 minutes and make a determination once every 10 minutes. The timer time used as the determination timing can be set arbitrarily. Moreover, you may enable it to change the setting of timer time for every measurement value of the same kind, or for every measuring device of the same kind.

(Step S207) If any of the detected water level widths is different in Step S204, the determination unit 52 determines that an abnormality or false detection of an electrode-type water level gauge having a different detected water level width occurs.
(Step S208) Next, the output control part 53 alert | reports the electrode-type water level meter determined to be abnormal or erroneous detection. For example, the output control unit 53 causes the display device DP to display information indicating the electrode type water level meter determined to be abnormal or erroneous detection, and causes the output unit 4 to output a buzzer sound.

  Thus, when the measurement target is the water level on the suction side, the determination unit 52 operates as follows under the condition that the water tanks on the suction side of the pumps PP1, PP2, and PP3 are connected to each other. That is, the determination unit 52 is measured by a water level meter (corresponding to an electrode type water level meter EWG1, EWG2, EWG3 as an example in the present embodiment) that is provided corresponding to each of three or more pumps and measures the water level on the suction side. Based on the water level, the presence or absence of an abnormality or false detection of the measuring instrument is determined. Thereby, since the water tanks on the suction side of each pump are connected to each other, the water level on the suction side of each pump becomes substantially the same. For this reason, when one water level meter shows a measured value different from two or more other water level meters, it can be determined that the water level meter is abnormal or erroneously detected.

  In addition, in the case of the determination for the electrode type water level gauges EWG1, EWG2, and EWG3, since the external factor is the measurement object, it is not a device that measures the state quantity of the pump operation like a pressure gauge. There is no need for logic to determine whether it is abnormal or the abnormality of the measuring instrument itself.

  As described above, in the first embodiment, the control device CON is used in a pump station having three or more pumps that are provided in parallel and pump up water from the suction side and discharge water pumped up to the discharge side. The control device CON includes a control unit 51 that determines whether or not the pump can be operated, whether there is an abnormality, or a failure location, using measurement values measured by a measuring instrument provided in the pump station 101. Further, the control device CON is provided corresponding to each of the three or more pumps and based on the measured values measured by each of the three or more measuring devices that should show the same value even if the water level on the suction side changes, The determination part 52 which determines the presence or absence of abnormality or false detection of a measuring instrument is provided.

  As a result, even if the pump operates and the water level on the suction side changes or the water level on the suction side changes, each measuring instrument that should show the same value shows the same measured value. When a measured value different from one or more measuring instruments is indicated, it can be determined that the measuring instrument is abnormal or erroneously detected. For this reason, it is possible to improve the accuracy of detection of abnormality or false detection of the measuring instrument. In addition, since the control device determines whether there is an abnormality or false detection of the measuring instrument, the operator involved in the inspection does not have to check the abnormality or erroneous detection of the measuring instrument one by one. The burden on the operator can be reduced.

  Moreover, the determination part 52 specifies the measuring device which has abnormality, or the measuring device which performed the misdetection based on three or more measured values, when it determines with there being abnormality or erroneous detection of a measuring device. Thereby, since the operator who concerns on an inspection can grasp | ascertain the measuring device which has abnormality, or the measuring device which performed the false detection, the burden of the operator who concerns on an inspection can be reduced.

  A modification of the processing of this embodiment will be described with reference to FIG. FIG. 7 is an example in which measured values of measuring instruments that measure the same kind of state quantity for the same kind of measurement target are plotted for each time. In this case, at the times t1 and t2, the measured values of the three measuring instruments are not very varied, and the difference between any pair is within the allowable error α. However, at time t3, the measurement value of Unit 3 is greatly different from the measurement value of the other units, and the difference between the measurement value of Unit 3 and the measurement value of the other units is equal to or greater than the allowable error α. In this way, the determination unit 52 plots the measurement value as it is, and measures the measurement device that shows a value greatly different from the measurement value of the measurement device of the same type of another unit as a measurement device having an abnormality or misdetection. You may specify as a container.

  The determination unit 52 detects a measurement value that protrudes from the measurement value population among a plurality of measurement values of the same type that are the target, and the measurement device that indicates the measurement value is abnormal or erroneously detected. It may be determined that the measuring instrument has been operated. Here, the measured value is, for example, the water level of the suction water tanks ST1, ST2, ST3, the pressure value of the discharge pressure, the current value supplied to the drive units DM1, DM2, DM3, the bearing temperature of the speed reducers RD1, RD2, RD3. Or the lubricating oil temperature.

  Note that the determination unit 52 of the control device CON uses the same method as the determination of abnormality or false detection of the discharge pressure gauges PS1, PS2, and PS3 described above, the current values of the driving devices DM1, DM2, and DM3, and the speed reducer RD1. , RD2, RD3 bearing temperature or lubricating oil temperature, falling water detection, water level and other measured values compared with the measured data under the same conditions so far, or compared with the corresponding measured values of other units You may further have the function to judge whether the significant abnormal value exceeding a threshold value has come out. As a result, in addition to pressure gauge abnormalities or false detections, other gauges may not detect abnormalities or false detections of pressure gauges or measuring instruments when significant abnormal values exceeding a predetermined threshold value are output. The determination unit 52 can determine that the device under measurement (for example, a pump, a speed reducer, or a drive machine) has an abnormality. On the other hand, if an abnormality or false detection of the pressure gauge is detected, but no significant abnormal value exceeding a predetermined threshold value is output in any of the other measuring instruments, the determination unit 52 indicates that the pressure gauge is abnormal. Judgment can be made. Therefore, the determination unit 52 determines whether a measuring instrument such as a pressure gauge, a thermometer, or an ammeter is malfunctioning or erroneously detected, or whether a device under measurement (for example, a pump, a speed reducer, or a driving machine) is abnormal. can do.

  When the function is added in this way, the determination unit 52 determines that there is no abnormality other than the specific measuring instrument as a result of the abnormality diagnosis of all the measuring instruments examined by the added function, and the measured device (for example, a pump, a reducer) If there is no abnormality such as a failure in the main body of the drive), it is determined that there is an abnormality or a false detection only for that specific measuring instrument. In this case, the output control unit 53 notifies the output unit 4 of the abnormality of the specific measuring instrument. For example, the output control unit 53 causes the output unit 4 to issue an alarm such as a buzzer sound.

  In the case of the water level gauge, the suction water tanks ST1, ST2, ST3 are connected to each other, and all the units measure the same water level. Therefore, the determination unit 52 includes the first continuous water level gauge CWG1 and the three electrodes. Of the measured values of the formula water level gauges EWG1, EWG2, and EWG3, three or more measured values may be used to determine whether or not the water level gauge from which these measured values have been acquired or whether there is a false detection.

  In addition, when it is determined by the determination unit 52 that the device to be measured has an abnormality, there is a possibility that a difference between the units has occurred between the measurement values of the measuring device due to a failure of the device to be measured (for example, a pump). There is. Therefore, in order to determine the failure of the device under measurement itself, when the determination unit 52 determines that there are a plurality of measuring instruments in a specific machine, abnormality or false detection during the process of determining the abnormality of the device under measurement, Since the state quantities of the devices themselves are different, the output control unit 53 may notify the output unit 4 of an abnormality of the device under measurement or a performance deterioration of the device under measurement. For example, the output control unit 53 may display “abnormality of the device under measurement” or “performance degradation of the device under measurement” on the display device DP.

  In addition, in order to specify that there is an abnormality in the measuring instrument, the measured data immediately before the measuring instrument (hereinafter referred to as the target measuring instrument) whose specific measured value is different from the same type of measured value of other units When it is detected that there is no movement in the data (a few minutes before the abnormality is detected), the determination unit 52 determines that the target measuring instrument has an abnormality or a false detection. In that case, the output control unit 53 may notify the abnormality or false detection of the target measuring instrument from the output unit 4 (for example, the unit number of the target measuring instrument and the name of the measuring instrument are indicated as “□ Unit XX measuring instrument abnormality”). May be displayed on the display device DP).

  Thus, the determination part 52 can detect the abnormality of the measuring device of a specific number machine by detecting the deviation between the number machines of the measured value of a measuring device. In addition, when it is determined that there is no abnormality in the measurement device of the specific unit from the measurement values of other measurement devices or the confirmation of the measurement device after notification, the determination unit 52 determines whether the measurement target device has an abnormality or It can be determined that the performance is degraded. As a result, it is possible to contribute to early detection of a failure and grasp of the state of performance deterioration.

<Second Embodiment>
Next, the second embodiment will be described. In 1st Embodiment, the determination part 52 in the control apparatus CON measures the same kind of state quantity about the same kind of to-be-measured object provided corresponding to each of three or more pumps, while the pump is drive | operating. Based on the measured value measured by the measuring instrument, whether or not there was any abnormality or false detection of the measuring instrument was determined. In the second embodiment, in addition to that, two continuous water level meters that continuously measure the water level on the suction side are provided, and the determination unit 52 determines at least two water levels from the water level width detected by each of the step-type water level meters. The normal water level width with the same width is determined, and the measured value of the continuous water level meter is compared with the normal water level width to determine whether each continuous water level meter has an abnormality or a false detection. And when the determination part 52 determines with the determination part 52 that the continuous water level gauge used for control of the pump among two continuous water level gauges is abnormal, other than the said continuous water level gauge The pump is controlled using the measured value of the continuous water level gauge.

  FIG. 8 is a schematic plan view of a pump station according to the second embodiment. As shown in FIG. 8, the pump station 102 according to the second embodiment has one to two continuous water level meters installed upstream of the screen SR1 as compared to the pump station 101 according to the first embodiment. The points are different. That is, the pump station 101 is further provided with a third continuous water level gauge CWG3.

  As in the first embodiment, the control device CON monitors the first, second and third units of the pump station using the measurement values of the measuring instrument. Since the configuration of the control device CON is the same as the configuration of the control device CON of the first embodiment, its configuration diagram is omitted. The control device CON according to the present embodiment has the following functions in addition to the control device CON according to the first embodiment.

  The determination unit 52 executes the following processing at an arbitrary time interval, for example. First, the determination unit 52 determines a normal water level width that matches at least two water level widths from the water level widths detected by the electrode type water level gauges EWG1, EWG2, and EWG3. As a result, the normal water level width is defined as the water level width in which at least two water level widths detected by the electrode type water level gauges provided corresponding to each pump match, so that the correct water level width can be set to the normal water level width. it can.

  Next, the determination unit 52 compares the water level detected by the first continuous water level gauge CWG1 with the normal water level width, and determines whether the first continuous water level gauge CWG1 is abnormal or erroneously detected. At that time, the determination unit 52 determines that the first continuous water level gauge CWG1 is normal if the water level detected by the first continuous water level gauge CWG1 falls within the normal water level width. On the other hand, if the water level detected by the first continuous water level gauge CWG1 does not fall within the normal water level width, the determination unit 52 determines that the first continuous water level gauge CWG1 is abnormal or has been erroneously detected. Similarly, the determination unit 52 compares the water level detected by the third continuous water level gauge CWG3 with the normal water level width, and determines whether the third continuous water level gauge CWG3 is abnormal or erroneously detected. Thereby, by comparing the water level detected by the first continuous water level gauge CWG1 and the water level detected by the third continuous water level gauge CWG3 with the normal water level width determined to be correct, Abnormality or erroneous detection of the continuous water level gauge CWG1 and the third continuous water level gauge CWG3 can be accurately determined.

When the determination unit 52 determines that the continuous water level meter used for controlling the pump among the plurality of continuous water level meters has an abnormality or a false detection, the control unit 51 in the control device CON includes a device other than the continuous water level meter. Pumps PP1, PP2 and PP3 are controlled using the measured values of other continuous water level gauges.
For example, the case where the control unit 51 uses the water level detected by the first continuous water level gauge CWG1 for controlling the pumps PP1, PP2, and PP3 will be described. In that case, when the determination unit 52 determines that the first continuous water level gauge CWG1 is abnormal, the control unit 51 stops using the measurement value of the first continuous water level gauge CWG1 in the control. The pumps PP1, PP2 and PP3 are controlled using the measured value of the third continuous water level gauge CWG3.

  By doing in this way, even when the first continuous water level meter CWG1 is clogged with dust and the first continuous water level meter CWG1 causes a false detection, the control unit 51 performs the normal third continuous water level meter CWG1. It switches so that pump PP1, PP2, PP3 may be controlled using the measured value of type | formula water level gauge CWG3. Thereby, even if the first continuous water level gauge CWG1 causes a false detection, the operation can be continued, so that the reliability as equipment can be improved.

  In this embodiment, a plurality of continuous water level meters are provided and switched in the event of an abnormality. However, when an abnormality occurs in the continuous water level meter with one continuous water level meter, the electrode type water level You may switch so that it may control using the measured value of a meter. However, in that case, an electrode having a length corresponding to the preset control water level is added to the electrode type water level gauge by the number of control water levels.

  In the case of a water level gauge, unlike a pressure gauge or an ammeter, abnormality diagnosis is possible not only during pump operation but also when stopped.

As described above, in the present embodiment, the pump station is provided with a plurality of continuous water level meters that continuously measure the water level on the suction side and the pumps PP1, PP2, and PP3, and measures the water level on the suction side step by step. A stepped water level meter (in this embodiment, as an example, an electrode type water level meter) is provided.
And the determination part 52 determines the normal water level width | variety which at least 2 water level width | variety matches from the water level width | variety each detected by the step type water level meter (in this embodiment, an electrode type water level meter), By comparing the measured value and the normal water level width, it is determined whether there is any abnormality or false detection of the continuous water level gauge. When it is determined by the determination unit 52 that the continuous water level meter used for the control of the pumps PP1, PP2, and PP3 has an abnormality or a false detection, the control unit 51 detects the continuous water level meter other than the continuous water level meter. The pumps PP1, PP2, and PP3 are controlled using the measured values.

<Third Embodiment>
Subsequently, a third embodiment will be described. In the second embodiment, the control device CON determines the normal water level width from the water level width detected by each of the electrode type water level gauges, and compares the normal water level width with the water level measured by the continuous water level gauge, The presence or absence of abnormality or false detection of the continuous water level gauge was judged. On the other hand, in the third embodiment, the control device CON closes the discharge valve MD1 and stops the drainage of the pump, and the pump PP1 is operating, and the current value of the driver DM1 and the pressure of the discharge pressure The value is used to determine whether the pump PP1 is abnormal or deteriorated. The operation with the drainage of the pump stopped in this way is called a pump shut-off operation.

  Since the configuration of the pump station according to the third embodiment is the same as the configuration of the pump station according to the first embodiment, detailed description thereof is omitted. As described above, the pump station 101 measures the current supplied to the driving units DM1, DM2, and DM3 provided corresponding to the driving units DM1, DM2, and DM3 that move the pumps PP1, PP2, and PP3, respectively. Ammeters CS1, CS2, and CS3 are provided. Further, the pump station 101 includes pressure gauges PS1, PS2, and PS3 that are provided corresponding to the pumps PP1, PP2, and PP3 and measure the discharge pressures of the pumps PP1, PP2, and PP3.

Similar to the first embodiment and the second embodiment, the control device CON monitors the first, second, and third units of the pump station using the measurement value of the measuring device. Since the configuration of the control device CON is the same as the configuration of the control device CON of the first embodiment, its configuration diagram is omitted. The control device CON according to the present embodiment has the following functions in addition to the control device CON according to the first embodiment.
The determination unit 52 uses the measurement values measured by the ammeters CS1, CS2, and CS3 and the pressure values measured by the pressure gauges PS1, PS2, and PS3 when the pump is operating with the drainage of the pump stopped. Thus, the presence or absence of abnormality or deterioration of the corresponding pumps PP1, PP2, PP3 is determined.

The process of the determination unit 52 will be described with reference to FIG. FIG. 9 is a flowchart illustrating an example of a pump abnormality or deterioration determination process according to the third embodiment. In FIG. 9, the process of determining abnormality or deterioration of the pump PP1 of the first unit will be described as a representative.
(Step S301) First, the first unit, the second unit, and the third unit are stopped.

  (Step S302) Next, the control unit 51 determines whether or not the water level detected by the first continuous water level gauge CWG1 has reached the operation start water level L (1) of the first unit.

  (Step S303) In step S302, when it is determined that the operation start water level L (1) of the first unit has been reached, the control unit 51 fully closes the discharge valve MD1 provided in the discharge pipe of the first unit. Control.

(Step S304) When the control unit 51 confirms that the discharge valve MD1 is fully closed, the control unit 51 detects the water level width L _L (1) to L _U detected by the electrode-type water level gauge EWG1 provided in the first unit. (1) is acquired from the electrode type water level gauge EWG1.

(Step S305) Next, the determination unit 52, whether or not the condition that 1 Unit operation start level L (1) is and the water level width L less than _U (1) beyond the level width _L L (1) judge.

(Step S306) In step S305, if the condition that 1 Unit operation start level L (1) is and the water level width L less than _U (1) beyond the level width _L L (1), i.e., the first continuous When the measured value of the water level gauge CWG1 falls within the measured water level width of the electrode type water level gauge EWG1 of Unit 1, the control unit 51 operates the pump using the measurement signal of the first continuous water level gauge CWG1.

(Step S307) On the other hand, in step S305, if the first car of the operation start level L (1) does not satisfy the condition that it is and the water level width L less than _U (1) beyond the level width _L L (1), i.e. the When the measured value of the continuous water level gauge CWG1 of 1 does not fall within the measured water level width of the electrode type water level gauge EWG1 of the first unit, the control unit 51 detects the water level width L _L (2) detected by the electrode type water level gauge EWG2 of the second unit. ) To L _U (2) are acquired from the electrode type water level gauge EWG2.

(Step S308) Next, the determination unit 52, whether or not the condition that 1 Unit operation start level L (1) is less than the water level width _L L (2) exceeds and the water level width L _U (2) judge.

(Step S309) In step S308, if the condition that 1 Unit operation start level L (1) is less than the water level width _L L (2) exceeds and the water level width L _U (2), i.e., the first continuous When the measured value of the water level gauge CWG1 falls within the measured water level width of the electrode type water level gauge EWG2 of Unit 2, the determination unit 52 determines that the electrode type water level gauge EWG1 of Unit 1 is out of order.

  (Step S310) And the control part 51 does not use the signal from the electrode type water level gauge EWG1 of No. 1 unit for control.

  (Step S311) The control unit 51 operates the pump using a signal from the first continuous water level gauge CWG1. Thereafter, the process proceeds to step S315.

(Step S312) On the other hand, in step S308, if the first car of the operation start level L (1) does not satisfy the condition that is less than the water level width _L L (2) exceeds and the water level width L _U (2), i.e. the When the measured value of the first continuous water level gauge CWG1 does not fall within the measured water level width of the electrode type water level gauge EWG2 of Unit 2, the determination unit 52 determines that the first continuous water level gauge CWG1 is in failure.

  (Step S313) Then, the control unit 51 does not use the signal from the first continuous water level gauge CWG1 in the control.

  (Step S314) The control unit 51 switches to operate the pump using a signal from the electrode type water level gauge EWG1 of the first unit, and the process proceeds to step S315.

  (Step S315) The control unit 51 connects a power interrupter (not shown) of Unit 1 and supplies power to Unit 1.

  (Step S316) Since the discharge valve MD1 of Unit 1 is closed at this time, the pump cutoff operation is performed for a while.

  (Step S317) The control unit 51 acquires the current value I (1) of the driving device DM1 from the ammeter CS1. In addition, since the drainage is not performed during the closing operation, the fluctuation in the water level of the suction water tank ST1 is smaller than that during the drainage. Therefore, it is possible to accurately determine whether there is an abnormality or a false detection. Further, the current value during the deadline operation is not affected by external factors (for example, water level), and shows a constant value unless the pump performance is deteriorated.

(Step S318) Next, the determination unit 52 determines that the current value I (1) of the drive unit DM1 is an allowable range (I _{M based on} the current value I _M at the time of the factory test stored in the storage unit 3 in advance. -ΔI or more and I _M + ΔI or less). Here, ΔI is an allowable current error.

(Step S319) In step S318, when the current value I (1) of the drive unit DM1 falls within an allowable range (I _M −ΔI or more and I _M + ΔI or less) based on the current value I _M at the time of the factory test, control is performed. The part 51 acquires the pressure value of the discharge pressure of the pump PP1 of the first unit from the pressure gauge PS1, and corrects the acquired pressure value according to the water level of the suction water tank ST1, thereby determining the pressure correction value P (1).

(Step S320) The determination unit 52 determines that the pressure correction value P (1) determined in Step S319 is an allowable range (P _{M based on} the pressure value P _M at the time of the factory test stored in the storage unit 3 in advance. -ΔP or more and P _M + ΔP or less). Here, ΔP is an allowable pressure error.

(Step S321) In step S320, when the pressure correction value P (1) falls within the allowable range (P _M −ΔP or more and P _M + ΔP or less) based on the pressure value P _M at the time of the factory test, the determination unit 52 It is determined that the pump PP1 is normal.

  (Step S322) The control unit 51 opens the discharge valve MD1 of the first machine. Thereby, the drainage of Unit 1 starts.

(Step S323) If the pressure correction value P (1) does not fall within the allowable range (P _M −ΔP or more and P _M + ΔP or less) based on the pressure value P _M at the time of the factory test in Step S320, the determination unit 52 Determines that the pressure gauge PS1 of the first unit is abnormal, and the output control unit 53 displays on the display device DP that the pressure gauge PS1 of the first unit is abnormal.

(Step S324) On the other hand, in Step S318, the current value I (1) of the drive unit DM1 does not fall within the allowable range (I _M −ΔI or more and I _M + ΔI or less) based on the current value I _M at the time of the factory test. In this case, the control unit 51 acquires the pressure value of the discharge pressure of the pump PP1 of the first unit from the pressure gauge PS1, corrects the acquired pressure value according to the water level of the suction water tank ST1, and sets the pressure correction value P (1). decide.

(Step S325) judging section 52, the allowable range (P _M pressure correction value P determined in step S324 (1) is, relative to the pressure value P _M factory test previously stored in the storage unit 3 -ΔP or more and P _M + ΔP or less).

(Step S326) In step S325, when the pressure correction value P (1) falls within the allowable range (P _M −ΔP or more and P _M + ΔP or less) based on the pressure value P _M at the time of the factory test, the determination unit 52 It is determined that the first ammeter CS1 is abnormal, and the output control unit 53 displays on the display device DP that the first ammeter CS1 is abnormal.

(Step S327) In step S325, when the pressure correction value P (1) does not fall within the allowable range (P _M −ΔP or more and P _M + ΔP or less) based on the pressure value P _M at the time of the factory test, the determination unit 52 Determines that the pump PP1 of the first unit is abnormal, and the control unit 51 stops the pump PP1 of the first unit.

  In the above flowchart, the determination unit 52 compares each measured value with the corresponding data at the time of the factory test, but is not limited thereto. Each measured value may become a value different from the factory test data due to deterioration over time, so it may be compared with the corresponding latest past data or may be compared with the measured values of other units.

  As described above, in the present embodiment, the pump station 101 includes ammeters CS1 and CS2 that are provided corresponding to the driving machines DM1, DM2, and DM3 that move the pumps PP1, PP2, and PP3 and that measure the current supplied to the driving machines. , CS3, and pressure gauges are provided corresponding to the pumps PP1, PP2, PP3, respectively, and measure the discharge pressures of the pumps PP1, PP2, PP3. When the pumps PP1, PP2, and PP3 are operating while the drains of the pumps PP1, PP2, and PP3 are stopped, the determination unit 52 measures the pressure values PS1 and PS2 that are measured by the ammeters CS1, CS2, and CS3. Using the pressure value measured by PS3, the presence or absence of abnormality or deterioration of the corresponding pumps PP1, PP2, PP3 is determined. Thereby, since the presence or absence of abnormality or deterioration of the pump can also be detected, it is possible to reduce the burden on the operator related to the inspection.

  In addition, in each embodiment, although the case where the number of number machines was three was demonstrated, the number of number machines may be two and the number of number machines may be four or more. That is, the number of pumps may be a plurality (two or more). This is because even if the number of pumps is two, it may be possible to compare three or more measured values. For example, in the case of the water level, three measurement values of one continuous water level meter and two electrode type water level meters may be compared with two pumps. Also, for example, if one of the two pumps is equipped with two measuring instruments and the remaining pump is equipped with one measuring instrument, the measured values of these three measuring instruments can be compared. Good. In each embodiment, an example in which a display panel as the display device DP is directly connected to the control device CON has been described. However, the present invention is not limited thereto, and the display panel DP is displayed on a display via a computer such as a personal computer. Also good.

  As described above, the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  1: input unit, 2: RAM, 3: storage unit, 4: output unit, 5: CPU, 51: control unit, 52: determination unit, 53: output control unit, 101, 102: pump station, CON: control device CS1, CS2, CS3: ammeter, CWG1: first continuous water level meter, CWG2: second continuous water level meter, CWG3: third continuous water level meter, DM1, DM2, DM3: driver, DP : Display device, DT: Discharge water tank, EWG1, EWG2, EWG3: Electrode water level gauge, MD1, MD2, MD3: Discharge valve, PP1, PP2, PP3: Pump, PS1, PS2, PS3: Pressure gauge, PU1: First Pump unit (unit 1), PU2: second pump unit (unit 2), PU3: third pump unit (unit 3), RD1, RD2, RD3: reducer, SR1, SR2, SR3: screen, T1, ST2, ST3: suction water tank, TS11, TS21, TS31, TS12, TS22, TS32: thermometer.

Claims (8)

A control device used in a pump station having a plurality of pumps provided in parallel and pumping water from the suction side and discharging water pumped to the discharge side,
Using a measurement value measured by a measuring instrument provided in the pump station, a controller that determines whether or not the pump can be operated, whether there is an abnormality, or a failure location;
Based on the measurement values measured by each of three or more measuring instruments that should show the same value even if the water level on the suction side changes, a determination unit that determines the presence or absence of abnormality or false detection of the measuring instrument,
A control device comprising: The plurality of pumps have the same structure and the suction ports of the pumps have substantially the same height,
The water tanks on the suction side of each of the pumps are connected,
The determination unit determines whether there is an abnormality or a false detection of the measuring instrument based on a measurement value measured while the pump is operating by each measuring instrument that measures the same kind of state quantity for the same type of device to be measured. The control device according to claim 1. The water tanks on the suction side of each of the pumps are connected,
The control device according to claim 1, wherein the determination unit determines whether there is an abnormality or a false detection of the measuring instrument based on a water level measured by each water level meter that measures the water level on the suction side. In the pump station, a continuous water level meter that continuously measures the water level on the suction side, and a step-type water level meter that is provided according to each of the pumps and that measures the water level on the suction side in stages, are provided.
The determination unit determines a normal water level width in which at least two water level widths match from the water level width detected by each of the stepped water level meters, and compares the measured value of the continuous water level meter with the normal water level width. The control device according to any one of claims 1 to 3, wherein the presence or absence of an abnormality or erroneous detection of the continuous water level gauge is determined. The pump station is provided with a plurality of continuous water level meters that continuously measure the water level on the suction side,
When it is determined by the determination unit that the continuous water level meter used for controlling the pump has an abnormality or a false detection, the control unit uses a measurement value of a continuous water level meter other than the continuous water level meter. The control device according to any one of claims 1 to 4, which controls the pump. The pump station is provided for each of the driving machines that operate the pump and measures an electric current supplied to the driving machine, and is provided for each of the pumps and measures the discharge pressure of the pump. Pressure gauge is installed,
The determination unit uses the measured value measured by the ammeter and the pressure value measured by the pressure gauge when the pump is operating with the drainage of the pump stopped, and the corresponding pump The control device according to any one of claims 1 to 5, wherein the presence or absence of abnormality or deterioration is determined. A control method used in a pump station having a plurality of pumps provided in parallel and pumping water from the suction side and discharging water pumped to the discharge side,
Using the measurement value measured by the measuring instrument provided in the pump station, determining whether the pump can be operated, whether there is an abnormality, or a failure location;
While the pump is operating, whether there is an abnormality or false detection of the measuring instrument based on the measured values measured by three or more measuring instruments that should show the same value even if the water level on the suction side changes A step of determining
A control method. A plurality of pumps provided in parallel and pumping water from the suction side and discharging the pumped water to the discharge side;
Three or more measuring instruments that should show the same value even if the water level on the suction side changes,
A control device;
With
The controller is
Using the measured value measured by the measuring instrument, whether to operate the pump, whether there is an abnormality, or a control part that determines the failure location,
While the pump is in operation, based on the measurement values measured by each of the three or more measuring instruments, a determination unit that determines the presence or absence of abnormality or false detection of the measuring instrument,
A pump station equipped with.

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