Pump facility and abnormality determination method for pump facility

Abstract

To further determine abnormality of a flooding system of a main pump device with a simple configuration SOLUTION: The pump device is provided with a main pump device for pumping a liquid, a full-water system having a vacuum pump for filling the main pump device with priming water, a make-up water tank for supplying sealing water to the vacuum pump, a flowmeter for measuring the amount of make-up water supplied from the make-up water tank to the vacuum pump, and a monitoring control device for monitoring the presence / absence of abnormality in the full-water system. The monitoring control device includes a makeup water quantity trend generation unit that generates a measured makeup water quantity trend indicating a temporal change in the makeup water quantity, an abnormality determination unit that determines the presence or absence of an abnormality in the full-water system based on the generated measured makeup water quantity trend, a storage unit that stores a normal-time makeup water quantity trend indicating a makeup water quantity trend when there is no abnormality in the full-water system, and a display unit that displays the measured makeup water quantity trend and the normal-time makeup water quantity trend.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a pump facility and a method for determining an abnormality in the pump facility. [Background technology]

[0002] In a power station (suction station) where a suction-type horizontal shaft pump is used as the main engine (main pump) and the water level on the suction side is lower than the impeller, the main pump must be primed using a water filling system equipped with a vacuum pump (auxiliary) in order to operate. If the water filling system breaks down or its performance deteriorates, causing a malfunction at the power station, the drainage function of the equipment will be impaired.

[0003] If the pump does not start, the startup congestion timer times out, indicating a startup congestion. This indicates that a problem has occurred in one of the pump's startup systems (such as the full-water system, fuel system, or cooling water system), but does not immediately identify which system is malfunctioning. Furthermore, if the timer times out without full-water detection, it may be possible to determine that an abnormality exists in the full-water system, but it is difficult to immediately determine what is malfunctioning in the full-water system. Therefore, the pump equipment disclosed in Patent Document 1 is equipped with a measuring instrument that measures state quantities (water temperature, air pressure) that affect the full-water time, calculates a theoretical value for the full-water time based on the measurement results from the measuring instrument, and compares this with the measured full-water time to determine whether there is an abnormality in the full-water system. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-206939 Summary of the Invention [Problem to be solved by the invention]

[0005] In the case of a conventional abnormality detection method using a start-up congestion timer, it is possible to determine whether an abnormality exists, but because it determines a fatal abnormality, it is not possible to determine the abnormality in the early stages or to investigate the cause. Furthermore, the abnormality detection method described in Patent Document 1 above requires the installation of separate measuring instruments (for example, thermometers and pressure gauges) that measure state quantities that affect the fill-up time, and a system that calculates the theoretical value of the fill-up time, which makes the equipment complex and increases costs.

[0006] The present invention has been made in consideration of the above, and aims to provide a pump equipment and a method for determining abnormalities in pump equipment that can more easily determine abnormalities in a water-filling system in which a main pump is filled with priming water. [Means for solving the problem]

[0007] In view of the above, one aspect of the present invention is a pump equipment comprising a main pump unit for pumping liquid, a water-filled system having a vacuum pump for filling the main pump unit with priming water, a make-up water tank for supplying sealing water to the vacuum pump, a flow meter for measuring the amount of make-up water supplied from the make-up water tank to the vacuum pump, and a monitoring and control device for monitoring the presence or absence of abnormalities in the water-filled system, wherein the monitoring and control device comprises a make-up water amount trend generation unit for generating a measured make-up water amount trend showing the change in the make-up water amount over time, and an abnormality determination unit for determining the presence or absence of abnormalities in the water-filled system based on the generated measured make-up water amount trend.

[0008] In the above pump equipment, the monitoring and control device further includes a memory unit that stores a normal makeup water volume trend that shows the change in makeup water volume over time when there is no abnormality in the full water system, and a display unit that displays the measured makeup water volume trend and the normal makeup water volume trend.

[0009] In the above pump equipment, the monitoring and control device further includes a memory unit that stores a normal makeup water volume trend that shows the change in makeup water volume over time when there is no abnormality in the full-water system, and the abnormality determination unit determines whether or not there is an abnormality in the full-water system based on the measured makeup water volume trend and the normal makeup water volume trend.

[0010] The abnormality determination unit may be configured to estimate the cause of the abnormality in the full water system based on the measured makeup water amount trend.

[0011] Another aspect of the present invention is a method for determining whether or not there is an abnormality in a water-filled system in a pumping facility that includes a main pumping device that pumps liquid, a water-filled system having a vacuum pump that fills the main pumping device with priming water, a make-up water tank that supplies sealing water to the vacuum pump, and a flow meter that measures the amount of make-up water supplied from the make-up water tank to the vacuum pump, the method comprising the steps of generating a make-up water volume trend that shows the change in the make-up water volume over time, and an abnormality determination step of determining whether or not there is an abnormality in the water-filled system based on the generated make-up water volume trend. [Effects of the Invention]

[0012] According to the present invention, an abnormality in the water-filled system of the main pump device can be more accurately determined with a simple configuration. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a block diagram illustrating an embodiment of a pump installation with a water-filling system. [Figure 2] 2 is a block diagram showing an example of the configuration of a monitoring and control device for the pump facility shown in FIG. 1. FIG. [Figure 3] FIG. 2 is an explanatory diagram illustrating an example of a display screen of a monitoring control device. [Figure 4] 10 is a graph showing an example of a trend in the amount of makeup water supplied to a vacuum pump under normal conditions (no abnormalities); [Figure 5] 10 is a graph showing an example of a makeup water amount trend when a sudden blockage occurs in a water-filled system. [Figure 6] 10 is a graph showing another example of the makeup water amount trend when a sudden blockage occurs in a water-filled system. [Figure 7] 10 is a graph showing an example of a makeup water amount trend when air intake occurs in a water-filled system. [Figure 8]10 is a graph showing an example of a makeup water amount trend when the amount of makeup water supplied to a full system becomes excessive. [Figure 9] 10 is a graph showing an example of a makeup water amount trend when the amount of makeup water supplied to a full water system is insufficient. [Figure 10] 10 is a graph showing an example of a makeup water amount trend when a vacuum pump in a water-full system is filled with water. [Figure 11] 10 is a graph showing an example of a makeup water amount trend when makeup water is interrupted in a full water system. [Figure 12] 10 is a graph showing an example of a makeup water amount trend when air is suddenly sucked in during a filling operation. [Figure 13] 10 is a flowchart showing an example of a method for determining an abnormality in a water-filled system in a monitoring control device. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a system diagram showing one embodiment of a pumping facility in a drainage pumping station, which includes a main pumping unit and a water filling system. The pumping facility 10 includes a main pumping unit 20, which is a suction-type horizontal shaft pump, a vacuum pump 30 that operates the main pumping unit 20, and a monitoring and control device 40. The vacuum pump 30 constitutes a water filling system that fills the main pumping unit 20 with priming water.

[0015] The main pump unit 20 has a casing 21 in which an inlet 21a opening to the suction tank 11 and an outlet 21b opening to the discharge tank 12 are formed. The suction tank 11 and the discharge tank 12 are provided with water level gauges 13 and 14 that measure the water levels on the suction side and the discharge side, respectively, and a signal corresponding to the measured water level is sent to the monitoring control device 40.

[0016] A pump shaft 22 and an impeller (vane wheel) extending laterally (horizontally) are provided in the casing 21, and a discharge valve 25 is provided downstream of the impeller. A driver 24 is connected to the pump shaft 22 via a reducer 23. Driving the driver 24 rotates the pump shaft 22, causing the main pump device 20 to pump water from the suction tank 11 and discharge it into the discharge tank 12.

[0017] When the main pump unit 20 is started, the vacuum pump 30 sucks air from the casing 21 and fills the inside of the casing 21 with priming water. The vacuum pump 30 is connected to the casing 21 via an intake line 31 (intake piping). The intake line 31 is provided with a full water detector 26 for detecting whether the casing 21 is full of priming water, and an intake valve 32 (motor valve or solenoid valve) for opening and closing the intake line 31. The intake line 31 is also provided with a vacuum breaker valve 33, and opening the vacuum breaker valve returns the pressure in the intake line 31 from negative pressure to atmospheric pressure.

[0018] The vacuum pump 30 is, for example, a water-sealed vacuum pump, and is driven by an electric motor 34. A water supply pipe 35 for supplying makeup water is connected to the intake side of the vacuum pump 30, and a discharge pipe 36 for discharging the supplied water and sucked air is connected to the exhaust side. The water supply pipe 35 is connected to a makeup water tank 37 via a water supply valve 38. The water supply pipe 35 is also provided with a flow meter 39 for measuring the flow rate of makeup water (sealing water) flowing in from the makeup water tank 37, and a signal corresponding to the measured flow rate is sent to a monitoring and control device 40.

[0019] The monitoring control device 40 is a computer device equipped with, for example, a calculation unit such as a CPU, a storage unit 41 such as RAM, ROM, a hard disk drive (HDD) or a solid state drive (SSD), an input / output interface, etc., and operates as a control device that monitors abnormalities in the water-filled system, which will be described later, by starting a control program stored in the storage unit 41. The control program may be installed on a computer that constitutes the monitoring control device 40, or may be stored on an external storage medium such as a DVD, BD or SSD, or may even be installed in the monitoring control device 40 via the Internet.

[0020] FIG. 2 is a block diagram showing the configuration of the monitoring and control device 40, which includes the storage unit 41 described above, as well as a makeup water amount trend generation unit 42, an abnormality determination unit 43, and a display unit 44.

[0021] The makeup water volume trend generating unit 42 generates a time distribution of the measured values ​​of makeup water volume (measured makeup water volume trend) based on information about the makeup water volume (make-up water flow rate) from the makeup water tank 37 measured at regular intervals by the flow meter 39. The abnormality determining unit 43 compares the time distribution of makeup water volume under normal conditions (when no abnormality has occurred) (normal makeup water volume trend) stored in advance in the storage unit 41 with the time distribution of makeup water volume measured upon startup of the main pump unit 20 (measured makeup water volume trend) to determine whether or not an abnormality exists in the full-water system, and if an abnormality is determined, estimates the cause of the abnormality based on changes in the measured makeup water volume trend. The time distribution of makeup water volume (make-up water volume trend) and estimation of the cause of the abnormality will be described later.

[0022] The display unit 44 is a display device such as a liquid crystal panel, and displays information such as the measured makeup water volume trend generated by the makeup water volume trend generating unit 42, and the presence or absence of an abnormality in the full-water system determined by the abnormality determining unit 43, and the cause of the abnormality. Fig. 3 is an example of a display screen on the display unit 44, where the normal makeup water volume trend is displayed on the left side, and the measured makeup water volume trend is displayed on the right side, and the lower part of the display screen displays information such as the water level in the suction tank 11 measured by the water level gauge 13, the presence or absence of an abnormality in the full-water system, and the cause of the abnormality (if an abnormality occurs).

[0023] In the pump equipment of this embodiment, the presence or absence of an abnormality in the full-water system is determined based on the time distribution of the makeup water volume (make-up water volume trend) rather than the amount of air suctioned by the vacuum pump 30. Since the amount of air suctioned varies depending on state quantities such as the temperature and air pressure of the makeup water, if the determination were based on the amount of air suctioned, measuring instruments (thermometer, pressure gauge) would be required to measure these state quantities, but in this embodiment, the presence or absence of an abnormality is determined based on the makeup water volume trend, so these measuring instruments are not necessary.

[0024] During normal use of pump equipment, the atmospheric pressure fluctuates between approximately 920 hPa and approximately 1013 hPa, with a maximum fluctuation range of only about 10%. Furthermore, regarding the temperature of makeup water, according to a publicly known graph showing the correlation between the degree of vacuum and the air volume reduction coefficient (the rate of reduction in the amount of suction air), even if the water temperature rises to 37°C, the air volume reduction coefficient only decreases by less than 10% compared to when the water temperature is 15°C.

[0025] Furthermore, the amount of makeup water supplied to the vacuum pump 30 varies depending on the degree of vacuum, but the applicant measured the relationship between the amount of makeup water and the degree of vacuum by changing the amount of air suctioned into the vacuum pump 30, and found that the amount of suctioned air has almost no effect on the amount of makeup water. Therefore, it was found that even if the amount of suctioned air fluctuates by about 10%, there is almost no effect on the amount of makeup water supplied to the vacuum pump 30.

[0026] Therefore, in the pump equipment of this embodiment, the presence or absence of an abnormality in the water-filled system can be determined by measuring the time change in the amount of make-up water to the vacuum pump 30 (make-up water amount trend) without measuring state quantities (temperature and pressure) that affect the amount of suction air, without using various instruments such as a thermometer or pressure gauge.

[0027] 4 is a graph showing an example of a makeup water amount trend during normal operation. The makeup water amount increases rapidly when the vacuum pump 30 is started (time T0), and then gradually increases as the vacuum level increases after the vacuum pump 30 reaches steady-state operation at time T1. Then, at time T2, the full-water detector 26 detects that the main pump unit 20 is full, and the intake valve 32 is closed, causing a rapid increase in the makeup water amount. Finally, at time T3, the vacuum pump 30 stops.

[0028] The above-mentioned trend in the amount of makeup water during normal operation can be obtained by measuring the amount of makeup water during a trial run immediately after installing or replacing parts of the vacuum pump 30 or the main pump device 20 that constitutes the pump equipment 10. The obtained data on the trend in the amount of makeup water during normal operation is stored in the memory unit 41.

[0029] Figure 5 is a graph showing an example of the makeup water volume trend when a sudden blockage (abnormality) occurs in a full-water system. When a sudden blockage occurs in a full-water system, the vacuum level on the secondary side of the blockage location increases rapidly, causing a sudden change in makeup water volume (make-up water volume). In the example of Figure 5, the ratio (ΔQ / Δt) of the change in makeup water volume ΔQ at any elapsed time Δt during a time period that would normally be steady operation (excluding times T0 to T1 and T2 to T3) is calculated. If this calculated value exceeds a set value α1, a sudden blockage is presumed to have occurred. For example, if the upper limit of makeup water volume when Δt is 10 seconds is set to 3 L / min, the set value α1 of (ΔQ / Δt) is 18 (= 3 / (10 / 60)). In the example of Figure 5, a sudden blockage is presumed to have occurred because the ratio of the change in makeup water volume between times T4 and T5 exceeds the set value α. The value of the set value α1 is not limited to this example, and can be determined appropriately depending on the specifications and characteristics of the pump equipment 10, for example, during test operation.

[0030] FIG. 6 is a graph showing another example of the makeup water volume trend when a sudden blockage occurs (when an abnormality occurs) in a full-water system. In this example, the time interval Δt1 between when the makeup water volume reaches a set value Q1 at time T6 and when the vacuum pump 30 stops (stops after issuing a startup congestion alert) at time T7 is calculated, and if the time Δt1 is equal to or greater than the set value Δts1, it is estimated that a sudden blockage has occurred. This set value Δts1 is a value shorter than the set value of the startup congestion timer. If the startup congestion timer is 10 minutes, Δts1 can be set to, for example, 3 minutes. Note that the value of the set value Δts1 is not limited to this example and can be appropriately determined, for example, during test operation, depending on the specifications and characteristics of the pump equipment 10.

[0031] FIG. 7 is a graph showing an example of a makeup water volume trend when air is sucked into the vacuum line (when an abnormality occurs). The sucked air makes it difficult for the pressure inside the vacuum pump to decrease, which in turn makes it difficult for the makeup water volume to increase. In this example, the difference Δt2 between the normal makeup water volume trend (time T8) and the measured makeup water volume trend (time T9) is calculated for the time it takes for the makeup water volume to reach the set value Q2. If this difference Δt2 is equal to or greater than the set value (Δts2), it is assumed that the makeup water volume has increased too slowly and that air has been sucked in. In this example, if the set value (Δts2) is 1 minute, the time difference (Δt2) until the reference value Q2 is reached is assumed to be 4 minutes, and air is judged to have been sucked in. Note that the set value Δts2 is not limited to this example and can be determined appropriately depending on the specifications and characteristics of the pump equipment 10, for example, during test operation.

[0032] FIG. 8 is a graph showing an example of a makeup water volume trend when the makeup water volume becomes excessive (when an abnormality occurs). When the makeup water valve is opened widely, the resistance of the makeup water flowing through the piping decreases, resulting in an increase in the amount of makeup water supplied to the vacuum pump 30. Furthermore, the excessive supply of makeup water reduces the amount of air that can be sucked by the vacuum pump 30, resulting in a longer time than usual until the pump is full. In this example, the average makeup water volume Q between any two points (times T10 and T11) is calculated, and if this calculated value is equal to or greater than a set value Q3, it is estimated that the makeup water volume is excessive. Here, the set value Q3 can be set, for example, as 120% of the average makeup water volume for the same interval in the normal makeup water volume trend (see FIG. 4). Note that the value of the set value Q3 is not limited to this example and can be determined appropriately depending on the specifications and characteristics of the pump equipment 10, for example, during test operation.

[0033] FIG. 9 is a graph showing an example of the makeup water volume trend when the makeup water volume is insufficient (when an abnormality occurs). When the makeup water valve opening is small, the resistance of the makeup water flowing through the piping increases, resulting in less makeup water being supplied to the vacuum pump 30. In this example, the average makeup water volume Q between any two points (times T12 and T13) is calculated, and if the calculated value is equal to or less than a set value Q4, it is estimated that the makeup water volume is insufficient. Here, the set value Q4 can be set, for example, as 80% of the average makeup water volume for the same interval in the normal makeup water volume trend (see FIG. 4). Note that the value of the set value Q4 is not limited to this example and can be determined appropriately depending on the specifications and characteristics of the pump equipment 10, for example, during test operation.

[0034] 10 is a graph showing an example of the makeup water volume trend when the vacuum pump 30 is filled with water for reasons such as the intake valve 32 not closing (when the amount of makeup water at start-up is excessive). After the vacuum pump 30 is filled with water, the vacuum pump 30 begins to push out water so that the water level in the makeup water tank remains constant, and as a result, almost no makeup water is supplied. However, because there are slight pressure fluctuations within the vacuum pump casing, the amount of makeup water does not become completely zero.

[0035] 10, if the amount of makeup water decrease at any elapsed time Δts3 after the amount of makeup water reaches the maximum value Qmax is equal to or greater than a set value ΔQs, and the vacuum pump 30 continues to operate for the set value Ts from the time when the amount of makeup water has decreased by ΔQs (time T14 in FIG. 10), then it is estimated that the vacuum pump 30 is filled with water. Note that the values ​​of the set values ​​Δts3, ΔQs, and Ts are not limited to this example, and can be determined appropriately depending on the specifications and characteristics of the pump equipment 10, for example, during test operation.

[0036] FIG. 11 is a graph showing an example of the makeup water volume trend when the supply of makeup water to the makeup water tank is interrupted (when an abnormality occurs). When the supply of makeup water is interrupted, the water level in the makeup water tank decreases, and the makeup water volume decreases accordingly, until the makeup water volume reaches zero. In the example of FIG. 11, the makeup water volume decreases while the vacuum pump 30 is operating, and reaches zero at time T15. It is estimated that the supply of makeup water to the makeup water tank was interrupted at the point in time when a set value Tp has elapsed from that point (time [T15 + Tp]). Note that the value of the set value Tp is not limited to this example and can be determined appropriately depending on the specifications and characteristics of the pump equipment 10, for example, during test operation.

[0037] FIG. 12 is a graph showing an example of the makeup water volume trend when sudden air suction occurs somewhere in the full-water system (when air suction exceeds the vacuum pump's intake volume). The sudden air suction makes it difficult for the internal negative pressure of the vacuum pump 30 to increase, and the makeup water volume tends not to increase (it is not zero). In the example of FIG. 12, it is estimated that sudden air suction occurred when the makeup water volume (set value) Q6 when the negative pressure is 0 remains approximately constant after a sudden decrease in makeup water volume. The value of makeup water volume Q6 is not limited to this example and can be determined appropriately depending on the specifications and characteristics of the pump equipment 10, for example, during test operation.

[0038] The method for determining an abnormality in the pump equipment in this embodiment will be described below using the flowchart in Figure 13. In step S10, when a pump operation command is issued by an operator, the intake valve 32 is opened and the vacuum pump 30 starts filling the tank with water.

[0039] When the vacuum pump 30 starts, make-up water flows into the vacuum pump 30 from the make-up water tank 37. The flow meter 39 measures the flow rate of make-up water (make-up water volume) from the make-up water tank 37 (step S11), and the measured make-up water volume is stored in the memory unit 41 as data constituting a make-up water volume trend (measured value) (step S12). Next, the abnormality determination unit 43 determines whether or not the above-mentioned abnormality determination conditions (see FIGS. 5 to 12) are met (whether or not an abnormality in the full-water system has been detected) based on the data on the normal make-up water volume trend stored in advance in the memory unit and the data on the measured make-up water volume trend generated in step S12 (step S13).

[0040] If no abnormality in the water-filling system is detected ("N" in step S13), the process proceeds to step S14, where graphs of the normal makeup water volume trend and the measured makeup water volume trend are displayed on the display unit 44. Next, it is determined whether the water-filling detector 26 has detected that the main pump unit 20 is full (step S15), and if fullness is detected, the intake valve 32 is closed and the vacuum pump 30 is stopped, ending the pump start-up process (step S16).

[0041] On the other hand, if an abnormality is detected in the full-water system ("Y" in step S14), the abnormality determination unit 43 estimates the cause of the abnormality that matches the abnormality determination conditions described above (step S17). Then, the fact that an abnormality has occurred in the full-water system, the estimated cause of the abnormality, and the trend of the makeup water amount are displayed on the display unit 44 (step S18). This allows the operator to easily recognize which part of the full-water system has the abnormality, and enables the cause of the abnormality to be resolved quickly.

[0042] In the above embodiment, the presence or absence of an abnormality in the full-water system is determined based on a change in the measured make-up water volume trend, but the present invention is not limited to this, and the presence or absence of an abnormality may be determined based on the result of a comparison with the normal make-up water volume trend. For example, the difference (absolute value) between the measured make-up water volume trend and the normal make-up water volume trend after the vacuum pump 30 is started may be accumulated, and when the accumulated value reaches a set value, it is determined that there is a trend that differs from the normal make-up water volume trend and an abnormality is determined.

[0043] In the above embodiment, the normal makeup water volume trend is generated using data from the trial operation, but the normal makeup water volume trend may also be the average of the data when the main pump device is operating normally, and used as the new normal makeup water volume trend.

[0044] In the above embodiment, the presence or absence (and cause) of an abnormality in a water-filled system is determined based on whether the measured make-up water volume trend satisfies predetermined conditions, but for example, a learning parameter set that has previously learned pattern images of make-up water volume trends that are determined to be abnormal may be provided in the monitoring control device 40, and a graph of the measured make-up water volume trend may be input into the learning parameter set to estimate the presence or absence of an abnormality and its cause. Also, the normal make-up water volume trend may be determined and input by an expert to be used as training data.

[0045] In the above embodiment, a pump facility using one main pump unit and one vacuum pump has been described as an example, but the present invention is not limited to this and can also be applied to a case where multiple main pump units and vacuum pumps are used.

[0046] The above-described embodiments have been described for the purpose of enabling a person having ordinary skill in the art to practice the present invention. Various modifications of the above-described embodiments would naturally be possible for a person skilled in the art, and the technical concept of the present invention may also be applied to other embodiments. The present invention is not limited to the described embodiments, but is to be interpreted in the broadest scope in accordance with the technical concept defined by the claims. [Explanation of symbols]

[0047] 10 Pumping equipment 20 Main pump unit 30 Vacuum Pump 37 Replenishment tank 39 Flow meter 40 Monitoring and control device 41 Storage section 42 Make-up water volume trend generator 43 Abnormality determination section 44 Display section

Claims

1. a main pumping device for pumping the liquid; a water filling system having a vacuum pump for priming the main pumping unit; a make-up water tank for supplying seal water to the vacuum pump; a flow meter that measures the amount of makeup water supplied from the makeup water tank to the vacuum pump; a monitoring control device that monitors whether or not there is an abnormality in the full water system; The monitoring and control device is characterized by comprising: a makeup water volume trend generation unit that generates a measured makeup water volume trend that shows the change in makeup water volume over time; and an abnormality determination unit that determines whether or not there is an abnormality in the full water system based on the generated measured makeup water volume trend.

2. The pump equipment of claim 1, characterized in that the monitoring and control device further includes a memory unit that stores a normal makeup water volume trend that shows the change in makeup water volume over time when there is no abnormality in the full water system, and a display unit that displays the measured makeup water volume trend and the normal makeup water volume trend.

3. The monitoring and control device further includes a storage unit that stores a normal makeup water amount trend that indicates a time change in makeup water amount when there is no abnormality in the full water system, The pump facility according to claim 1 , wherein the abnormality determination unit determines whether or not there is an abnormality in the full-water system based on the measured makeup water amount trend and the normal makeup water amount trend.

4. The pump facility according to claim 1 , wherein the abnormality determination unit estimates a cause of the abnormality in the full-water system based on the measured makeup water amount trend.

5. The pump facility according to claim 4 , wherein the abnormality determination unit estimates that a sudden blockage has occurred in the full-water system when a change in the amount of makeup water over a predetermined time interval exceeds a first set value.

6. 5. The pump equipment according to claim 4, wherein the abnormality determination unit estimates that a sudden blockage has occurred in the full water system when the time from when the amount of makeup water reaches a second set value to when the vacuum pump stops is equal to or longer than a first set time.

7. 5. The pump facility according to claim 4, wherein the abnormality determination unit estimates that the amount of makeup water supplied to the full water system is excessive when an average value of the amount of makeup water supplied at a predetermined time interval is equal to or greater than a third set value.

8. The pump facility according to claim 4 , wherein the abnormality determination unit estimates that the amount of makeup water supplied to the full water system is insufficient when an average value of the amount of makeup water supplied at a predetermined time interval is equal to or less than a fourth set value.

9. 5. The pump equipment according to claim 4, wherein the abnormality determination unit estimates that the vacuum pump is filled with water when the amount of makeup water that has decreased in a predetermined time period after the amount of makeup water has reached a maximum value is equal to or greater than a fifth set value and the vacuum pump has been operating for a third set time period after the amount of makeup water has decreased by the fifth set value.

10. The pump equipment according to claim 4 , wherein the abnormality determination unit estimates that the supply of makeup water to the makeup water tank has been interrupted when a fourth set time has elapsed with the amount of makeup water remaining at zero.

11. 5. The pump equipment according to claim 4, wherein the abnormality determination unit estimates that a sudden air intake has occurred in the full water system when the amount of makeup water decreases and then becomes approximately constant at a sixth set value.

12. The pump equipment of claim 3, wherein the abnormality determination unit estimates that air suction has occurred in the full water system when the difference between the normal makeup water volume trend and the measured makeup water volume trend in terms of the time until the makeup water volume reaches a seventh set value is equal to or greater than a fifth set time.

13. A method for determining whether or not there is an abnormality in a pumping system that includes a main pumping device that pumps a liquid, a water filling system having a vacuum pump that fills the main pumping device with priming water, a make-up water tank that supplies seal water to the vacuum pump, and a flow meter that measures the amount of make-up water supplied from the make-up water tank to the vacuum pump, comprising: generating a makeup water amount trend indicating a change over time in the makeup water amount; an abnormality determination step of determining whether or not there is an abnormality in the full water system based on the generated makeup water amount trend.

Images