Management method and management program

Abstract

To provide a method and a program for management that can specify an operation mode for a vertical shaft pump more readily than before.SOLUTION: A method for managing a vertical shaft pump using physical quantity data based on physical quantity associated with the vertical shaft pump includes: an acquisition step #10 for acquiring physical quantity data; and a mode specifying step #20 for specifying an operation mode for a vertical shaft pump on the basis of the physical quantity data, where the physical quantity data includes discharge pressure data associated with discharge pressure of the vertical shaft pump.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a management method and a management program for diagnosing a vertical pump. [Background technology]

[0002] In recent years, pumping stations equipped with vertical pumps have been increasingly installed in addition to or instead of existing culverts at the boundary between the upstream and downstream waterways in waterways with relatively small water volumes, such as tributaries that flow into the main river. A vertical pump is configured to suck in fluid from a suction bell at the bottom of a vertically installed main pipe and discharge it from a discharge bend installed above. Vertical pumps have various operating modes, such as an air operating mode in which the impeller rotates in the air and a total discharge operating mode in which the impeller rotates underwater, and the operating mode is determined by the relative position of the suction bell and the water surface.

[0003] Vertical pumps are operated for the purpose of forcibly draining water in an upstream waterway to a downstream waterway during, for example, a torrential rain. For example, when there are signs of a rise in the water level, the pump starts operating in air operation mode beforehand, and when the water level actually rises, it immediately switches to full discharge operation mode, a so-called advance standby type operation.

[0004] While opportunities to operate a vertical pump are limited during emergencies such as torrential rain, reliability is required. In other words, it is required to reliably prevent failures even though there are few opportunities to detect failures or their symptoms based on normal operating conditions. Conventionally, for example, Japanese Patent Application Laid-Open No. 2016-194287 (Patent Document 1) discloses a method for diagnosing a vertical pump based on the stop time of the vertical pump in a highly reproducible state in which a stop condition of the vertical pump is detected. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2016-194287 A [Patent Document 2] JP 2019-86004 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the technology of Patent Document 1, diagnosis is performed based on the behavior of the vertical pump when it is stopped, so there are cases where the information is insufficient to diagnose the state of the vertical pump while it is in operation. Also, the fact that the vertical pump can operate in multiple operation modes was not taken into consideration. Various physical quantities such as the pump's discharge pressure and vibration waveform behave differently depending on the operation mode, and some operation modes may not be suitable for diagnosis, but this fact was not fully taken into consideration.

[0007] As a technology for identifying the operation mode of a pump, a technology for identifying the operation mode based on the drive current of an electric motor is disclosed in JP 2019-86004 A (Patent Document 2). However, the technology of Patent Document 2 requires wiring work to input the drive current of the electric motor to a device that diagnoses the operation mode, and there is a concern that the implementation of this work will be time-consuming.

[0008] Therefore, there is a need to realize a management method and a management program that can identify the operating mode of a vertical pump more easily than before. [Means for solving the problem]

[0009] Books The invention oneThe management method of a vertical shaft pump uses physical quantity data based on physical quantities related to the vertical shaft pump, and includes an acquisition step of acquiring the physical quantity data, a mode identification step of identifying an operation mode of the vertical shaft pump based on the physical quantity data, and a diagnosis step of diagnosing a state of the vertical shaft pump based on the physical quantity data, wherein the physical quantity data includes discharge pressure data related to a discharge pressure of the vertical shaft pump and vibration waveform data caused by vibration of the vertical shaft pump, and when the discharge pressure data and the vibration waveform data are both below a predetermined threshold value in the mode identification step, the vertical shaft pump is identified as being in an air operation mode in which gas is sucked in and discharged, and the diagnosis step extracts a rotational frequency component of the vertical shaft pump from the vibration waveform data acquired during a period in which the operation mode was identified as the air operation mode, and diagnoses whether or not an imbalance has occurred in the vertical shaft pump based on an amplitude of the extracted rotational frequency component. The present invention relates to two The management method of a vertical shaft pump uses physical quantity data based on physical quantities related to the vertical shaft pump, and includes an acquisition step of acquiring the physical quantity data, a mode identification step of identifying an operation mode of the vertical shaft pump based on the physical quantity data, and a diagnosis step of diagnosing a state of the vertical shaft pump based on the physical quantity data, wherein the physical quantity data includes discharge pressure data related to a discharge pressure of the vertical shaft pump, and when the discharge pressure data exceeds a predetermined threshold, the vertical shaft pump is identified as being in a total discharge operation mode in which liquid is sucked in and discharged, and the diagnosis step extracts a pulsating component from the discharge pressure data acquired during a period in which the operation mode was identified as the total discharge operation mode, and diagnoses the presence or absence of interference inside the vertical shaft pump based on the extracted pulsating component.

[0010] Also , Books The invention oneThe management program for a vertical shaft pump uses physical quantity data based on physical quantities related to a vertical shaft pump, and when executed on a computer, the management program can cause the computer to realize an acquisition function for acquiring the physical quantity data, a mode identification function for identifying an operation mode of the vertical shaft pump based on the physical quantity data, and a diagnosis function for diagnosing a state of the vertical shaft pump based on the physical quantity data, wherein the physical quantity data includes discharge pressure data related to the discharge pressure of the vertical shaft pump and vibration waveform data caused by vibration of the vertical shaft pump, and when the discharge pressure data and the vibration waveform data are both below a predetermined threshold value, the mode identification function identifies the vertical shaft pump as being in an air operation mode in which it sucks in and discharges gas, and the diagnosis function extracts a rotational frequency component of the vertical shaft pump from the vibration waveform data acquired during a period in which the operation mode was identified as the air operation mode, and diagnoses whether or not an imbalance has occurred in the vertical shaft pump based on the amplitude of the extracted rotational frequency component. The present invention relates to two The management program for a vertical shaft pump uses physical quantity data based on physical quantities related to the vertical shaft pump, and when executed on a computer, the management program can cause the computer to realize an acquisition function for acquiring the physical quantity data, a mode identification function for identifying an operating mode of the vertical shaft pump based on the physical quantity data, and a diagnosis function for diagnosing a state of the vertical shaft pump based on the physical quantity data, wherein the physical quantity data includes discharge pressure data related to a discharge pressure of the vertical shaft pump, and when the discharge pressure data exceeds a predetermined threshold, the mode identification function identifies the vertical shaft pump as being in a total discharge operating mode in which liquid is sucked in and discharged, and the diagnosis function extracts a pulsating component from the discharge pressure data acquired during a period in which the operating mode was identified as the total discharge operating mode, and diagnoses the presence or absence of interference inside the vertical shaft pump based on the extracted pulsating component.

[0011] In the configuration of these management methods and management programs, the operation mode is identified using discharge pressure data that is normally acquired in a vertical pump, so the operation mode of the vertical pump can be identified without electrical work such as adding new wiring to the control panel. 。 Furthermore, one Management method and one The management program configuration takes into account at least two types of physical quantity data, the discharge pressure data and the vibration waveform data, thereby improving the accuracy of mode identification and enabling early detection of foreign matter, deformation, damage, etc. in the rotary drive unit of the vertical pump, thereby enabling planned maintenance of the vertical pump. Furthermore, two Management method and two In the configuration of the management program described above, the physical quantity data acquired in the full discharge operation mode, in which steady-state physical quantity data is likely to be obtained, is used for diagnosis. This improves the accuracy of diagnosis, and enables early detection of occurrence of phenomena such as the widening of the gap or deformation in the rotary drive unit, thereby enabling planned maintenance of the vertical pump.

[0025] Further features and advantages of the present invention will become more apparent from the following description of exemplary and non-limiting embodiments, which are given with reference to the drawings. [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 is a front view of a vertical shaft mixed flow pump according to an embodiment. [Diagram 2] FIG. 2 is a functional block diagram of a vertical shaft mixed flow pump according to an embodiment. [Diagram 3] FIG. 2 is a diagram showing a state in which the vertical-shaft mixed-flow pump according to the embodiment is in a gas-liquid mixed operation mode. [Figure 4] FIG. 2 is a diagram illustrating a state in which the vertical shaft mixed flow pump according to the embodiment is in a total discharge operation mode. [Diagram 5] FIG. 2 is a diagram illustrating a state in which the vertical-shaft mixed-flow pump according to the embodiment is in a shutoff operation mode. [Figure 6]FIG. 2 is a flow diagram of a management method according to an embodiment. [Figure 7] FIG. 11 is a flow diagram of a mode specifying process according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] An embodiment of a management method and a management program according to the present invention will be described with reference to the drawings. In the following, an example will be described in which the management method and the management program according to the present invention are applied to the management of a vertical shaft mixed-flow pump 1, which is a typical vertical shaft pump installed in a drainage pumping station.

[0028] [Configuration of vertical shaft mixed flow pump] The vertical shaft mixed flow pump 1 to be managed in this embodiment includes a cylindrical main pipe 10 in which an impeller 11 is housed, two operation mode switching pipes 20 (20A, 20B) that are in fluid communication with the main pipe 10 below the impeller 11, a suction bell 30, a discharge bend 40, a driver 50 that supplies driving force to the impeller 11, and a control panel 60 (FIGS. 1 and 2). The operation mode switching pipes 20 (20A, 20B) have a first portion 21 (21A, 21B) that extends upward from a portion connected to the main pipe 10, a second portion 22 (22A, 22B) that extends downward from the upper end of the first portion 21, and an opening 23 (23A, 23B) that opens at the lower end of the second portion 22.

[0029] The vertical-shaft mixed-flow pump 1 is also provided with a pressure sensor 61 for acquiring discharge pressure data relating to the discharge pressure of the vertical-shaft mixed-flow pump 1 at the discharge bend 40, a vibration sensor 62 for acquiring vibration waveform data caused by vibration of the vertical-shaft mixed-flow pump 1, and a rotation sensor 63 for acquiring rotation speed data relating to the rotation speed of the driver 50 (FIG. 2). Note that the discharge pressure, vibration, and rotation speed are all examples of physical quantities according to the present invention, and the discharge pressure data, vibration waveform data, and rotation speed data are all examples of physical quantity data according to the present invention.

[0030] A PLC 64 is installed in the control panel 60, and the above-mentioned various sensors are electrically connected to the PLC 64. The actuator 50 is also electrically connected to the PLC 64, and the operation of the actuator 50 is controlled by an electrical signal generated from the PLC 64. Such control may be manual control triggered by a human operation, or automatic control triggered by detection values ​​of the above-mentioned various sensors.

[0031] The control panel 60 is also provided with a communication device 65 capable of performing data communication via a mobile phone network. Various pieces of information relating to the operating state of the vertical shaft mixed flow pump 1, including the physical quantity data input from each sensor to the PLC 64, are stored in a server device 70 via the communication device 65 and the mobile phone network N1. Each piece of physical quantity data is stored in the server device 70 as a set of information obtained by converting the detected physical quantities (discharge pressure, vibration, and rotation speed) into numerical values ​​and the time at which the physical quantities were detected, so that the change over time of each physical quantity is recorded.

[0032] The server device 70 is implemented as a known server-type computer, and includes general components of a server-type computer, such as a calculation device such as a CPU, a storage device such as a hard disk drive, an input device such as a keyboard, an output device such as a display, and a communication device such as a network card. A management program according to this embodiment is installed in the server device 70, and the calculation processing required in the management method according to this embodiment is performed by the server device 70.

[0033] A user (such as an administrator of the vertical-shaft mixed-flow pump 1) can access the server device 70 via the Internet N2 using a general-purpose terminal T (such as a personal computer or a smartphone) and view various information related to the operating state of the vertical-shaft mixed-flow pump 1. The various information that can be viewed here includes the collected physical quantity data itself and information generated as a result of implementing the management method according to this embodiment.

[0034] [Operation mode of vertical shaft mixed flow pump] The vertical-shaft mixed-flow pump 1 according to this embodiment can operate in the following operation modes: stop mode, air operation mode, gas-liquid mixed operation mode, total discharge operation mode, and shutoff operation mode. The state of the vertical-shaft mixed-flow pump 1 in each operation mode will be described below.

[0035] (a) Stop mode The stop mode is a state in which the vertical mixed-flow pump 1 is not operated. That is, the driver 50 is not driven and the impeller 11 is stopped. At this time, no fluid is discharged from the discharge bend 40 and the discharge pressure is substantially equal to the atmospheric pressure. Also, since the driver 50 is not driven, almost no vibration occurs and the rotation speed is substantially zero. Note that "substantially equal" here indicates that there is no pressurization due to active driving of the device, and does not require that the detection value of the pressure sensor 61 completely matches the atmospheric pressure. Similarly, "substantially zero" indicates that there is no detection of the rotation speed due to active driving of the device, and does not require that it be completely zero, including, for example, noise in the rotation speed data.

[0036] The vertical-shaft mixed-flow pump 1 can enter the stop mode regardless of the water level. However, considering the purpose of installing the vertical-shaft mixed-flow pump 1, which is to drain water when the water level rises, the stop mode is generally selected when the water level L is below the suction bell 30 (Figure 1).

[0037] (b) Air operation mode The air operation mode is a state in which the vertical shaft mixed flow pump 1 sucks in and discharges air (an example of gas). When the vertical shaft mixed flow pump 1 is in the air operation mode, the openings 23 (123A, 123B) of the two operation mode switching pipes 20 (20A, 20B) and the suction bell 30 are all above the water surface L, and the driver 50 is driven in this state (FIG. 1). Therefore, the impeller 11 rotates in the air, and air is sucked in and discharged. At this time, the pressurization of the air by the impeller 11 is negligible, so the discharge pressure is substantially equal to the atmospheric pressure, and in this respect it is difficult to distinguish from the stop mode. On the other hand, since the driver 50 is driven and vibrations caused by the drive are generated, the vibration waveform data reflects the vibrations. In the air operation mode, the impeller 11 steadily rotates in the air, so the vibration behavior is in a steady state. Therefore, the variance of the vibration waveform data is smaller than that in the gas-liquid mixed operation mode described later. The rotation speed data reflects the rotation speed of the driving machine 50.

[0038] (c) Gas-liquid mixed operation mode The gas-liquid mixed operation mode is a state in which the vertical shaft mixed flow pump 1 sucks in and discharges a mixture of air and water (an example of a gas-liquid mixture). When the vertical shaft mixed flow pump 1 is in the gas-liquid mixed operation mode, the opening 23A of the operation mode switching pipe 20A and the suction bell 30 are below the water surface L, and the opening 23B of the operation mode switching pipe 20 is above the water surface L (FIG. 3). In this state, the driver 50 is driven, and the impeller 11 rotates in water containing many air bubbles. This causes the mixture of air and water to be sucked in and discharged. At this time, the discharge pressure becomes higher than the atmospheric pressure because a fluid containing water is discharged from the discharge bend 40. In addition, since the driver 50 is driven and vibrations caused by the driving are generated, the vibration waveform data reflects the vibrations. However, the variance of the discharge pressure data and the vibration waveform data becomes relatively large due to the fact that a mixture of air and water is sucked in and discharged. The rotation speed data reflects the rotation speed of the driver 50.

[0039] (d) Total discharge operation mode The total discharge operation mode is a state in which the vertical shaft mixed flow pump 1 sucks in and discharges water (an example of a liquid). When the vertical shaft mixed flow pump 1 is in the total discharge operation mode, the openings 23 (123A, 123B) of the two operation mode switching pipes 20 (20A, 20B) and the suction bell 30 are all below the water surface L, and the driver 50 is driven in this state (FIG. 4). Therefore, the impeller 11 rotates in the water, and water is sucked in and discharged. At this time, water is discharged from the discharge bend 40, so the discharge pressure becomes higher than the atmospheric pressure. In addition, since the driver 50 is driven and vibrations caused by the drive are generated, the vibration waveform data reflects the vibration. Unlike the gas-liquid mixed operation mode, the fluid sucked in and discharged is water, so the discharge pressure and vibration values ​​are stable, and the variance of the discharge pressure data and the vibration waveform data is relatively small. The rotation speed data reflects the rotation speed of the driver 50.

[0040] (e) Shutoff operation mode The shutoff operation mode is an operation mode to which the pump is switched when the water level drops after the total discharge operation mode. When the vertical shaft mixed flow pump 1 is in the shutoff operation mode, the openings 23 (123A, 123B) of the two operation mode switching pipes 20 (20A, 20B) are above the water level L, and the primary side of the impeller 11 is substantially replaced with air (FIG. 5). Meanwhile, the secondary side of the impeller 11 still contains water that was pumped during operation in the total discharge operation mode. The driver 50 is driven in this state, but since almost no water is discharged from the discharge bend 40, the discharge pressure becomes close to atmospheric pressure. Also, water occasionally flows back (falls) from the secondary side of the impeller 11 to the primary side with gravity as the driving force, and this backflow causes irregular vibrations in the impeller 11. Reflecting this, the vibration waveform data becomes irregular. The rotation speed data reflects the rotation speed of the driver 50.

[0041] [How to manage vertical shaft mixed flow pumps] An embodiment of a management method for managing the vertical-shaft mixed-flow pump 1 will be described, assuming the configuration and operation mode of the vertical-shaft mixed-flow pump 1 described above. The management method according to this embodiment includes an acquisition step #10, a mode identification step #20, and a diagnosis step #30. In this embodiment, the acquisition step #10, the mode identification step #20, and the diagnosis step #30 are executed by the server device 70, and more specifically, each of the above steps is executed as a calculation process performed by the calculation device of the server device 70.

[0042] (1) Acquisition process #10 Acquisition process #10 is a process for acquiring physical quantity data based on physical quantities related to the vertical-shaft mixed-flow pump. In this embodiment, the physical quantity data used are discharge pressure data, vibration waveform data, and rotation speed data. These physical quantity data are acquired by the pressure sensor 61, vibration sensor 62, and rotation sensor 63 described above. As described above, each physical quantity data is input from each sensor to the PLC 64, and is stored in the server device 70 via the communication device 65 and the mobile phone network N1. This series of operations is an example of acquisition process #10.

[0043] As a pre-processing of the physical quantity data, known data processing may be performed, such as frequency filtering, calculation of an average value, calculation of a variance, and the like.

[0044] (2) Mode Identification Step #20 The mode identification process #20 is a process for identifying the operation mode of the vertical-shaft mixed-flow pump 1 based on the physical quantity data. In the mode identification process #20, attention is focused on the difference in behavior of the physical quantity data for each operation mode, and the operation mode of the vertical-shaft mixed-flow pump 1 is identified based on the physical quantity data. As described in the section "Operation Modes of the Vertical Shaft Mixed-Flow Pump," the vertical-shaft mixed-flow pump 1 according to this embodiment exhibits different behaviors in the discharge pressure data, vibration waveform data, and rotation speed data depending on the operation mode (Table 1).

[0045] Table 1: Relationship between the operation mode of a vertical shaft mixed flow pump and the behavior of physical quantity data [Table 1]

[0046] The decision flow for identifying the operation mode of the vertical-shaft mixed-flow pump 1 is shown in Fig. 7. In the first step #21, it is determined whether the rotation speed data exceeds a predetermined threshold value. Here, the threshold value is set to a value (e.g., 90 rpm) that the rotation speed of the impeller 11 normally exceeds when the driver 50 is operating. As a result, if the rotation speed data is equal to or lower than the predetermined threshold value (#21: No), it can be identified that the driver 50 is stopped, i.e., in the stop mode. In other cases (#21: Yes), the process proceeds to the second step #22.

[0047] In the second step #22, it is determined whether the variance of the discharge pressure data exceeds a predetermined threshold value. Here, the threshold value is set to a value that is approximately larger than the variance of the discharge volume data in the air operation mode and the full discharge operation mode. As summarized in Table 1, the gas-liquid mixed operation mode is the only operation mode that is characterized by a large variance of the discharge pressure data, so if the variance of the discharge pressure data exceeds the predetermined threshold value (#22: Yes), it can be determined that the gas-liquid mixed operation mode is in effect. In other cases (#22: No), the process proceeds to the third step #23.

[0048] In the third step #23, it is determined whether the discharge pressure data exceeds a predetermined threshold value. Here, the threshold value is set to a value higher than atmospheric pressure (for example, a gauge pressure of 3 kPa). As summarized in Table 1, the operation modes in which the discharge pressure data becomes higher than atmospheric pressure are the gas-liquid mixed operation mode and the total discharge operation mode. However, when proceeding to the third step #23, the gas-liquid mixed operation mode is excluded (#22: Yes), so when the discharge pressure data is higher than atmospheric pressure (#23: Yes), it can be determined that the operation mode is the total discharge operation mode. In other cases, proceed to the fourth step #24.

[0049] In the fourth step #24, it is determined whether the variance of the vibration waveform data exceeds a predetermined threshold value. Here, the threshold value is set to a value that allows the occurrence of irregular vibrations in the shutoff operation mode to be identified. In other words, if the variance of the vibration waveform data exceeds the predetermined threshold value (#24: Yes), it is determined that the system is in the shutoff operation mode. Conversely, if the variance of the vibration waveform data is equal to or less than the predetermined threshold value (#24: No), i.e., if the vibration waveform data shows steady behavior, it is determined that the system is in the air operation mode.

[0050] In this way, the operation mode of the vertical shaft mixed flow pump 1 can be identified based on the discharge pressure data, vibration waveform data, and rotation speed data. The physical quantity data is stored in the server device 70 as a set of information on the detected physical quantities (discharge pressure, vibration, and rotation speed) converted into numerical values ​​and the time at which the physical quantities were detected, and the physical quantity data stored in the server device 70 is updated by assigning a mode label related to the operation mode identified based on the physical quantity data at each time to the physical quantity data at that time. In this case, a group of physical quantity data acquired in a predetermined time width including the physical quantity data to which the mode label is to be assigned can be handled as a whole, in order to take into account the variance of the discharge pressure data and the vibration waveform data.

[0051] Furthermore, the predetermined threshold value in each step can be empirically determined based on, for example, the specifications and operating history of the vertical shaft mixed flow pump 1.

[0052] (3) Diagnostic Step #30 The diagnosis process #30 is a process of diagnosing the vertical-shaft mixed-flow pump 1 based on the physical quantity data. In the air operation mode and the total discharge operation mode among the operation modes of the vertical-shaft mixed-flow pump 1, the discharge pressure data and the vibration waveform data show steady behavior, so it is easy to distinguish between the normal state and the abnormal state of the vertical-shaft mixed-flow pump 1. On the other hand, in the gas-liquid mixture operation mode and the shutoff operation mode, the variance is large for at least one of the discharge pressure data and the vibration waveform data, so even if a value that deviates from the normal state is detected, it is difficult to determine whether it is due to the variance or the abnormality. Also, since the vertical-shaft mixed-flow pump 1 is not operated in the stop mode, the acquired physical quantity data does not reflect the operation state of the vertical-shaft mixed-flow pump 1.

[0053] Considering the above, in this embodiment, the vertical-shaft mixed-flow pump 1 is diagnosed based only on the physical quantity data acquired during the period when the operation mode identified in the mode identification process #20 is the air operation mode or the total discharge operation mode (examples of the predetermined operation mode). In other words, the physical quantity data acquired during the period when the operation mode identified in the mode identification process #20 is the stop mode, the gas-liquid mixed operation mode, or the shutoff operation mode is not used as the basis for diagnosis.

[0054] In the air operation mode, each physical quantity data is less susceptible to the force (so-called fluid force) caused by the flow of sucked and discharged water, so that it is easy to clearly detect imbalance in the rotating body (which corresponds to the driver 50 and impeller 11) itself as a mechanical structure. Focusing on this, in this embodiment, the rotational frequency component of the vertical-shaft mixed-flow pump 1 is extracted from the vibration waveform data acquired during the period when the operation mode is identified as the air operation mode, and whether or not imbalance has occurred in the vertical-shaft mixed-flow pump 1 is diagnosed based on the amplitude of the extracted rotational frequency component.

[0055] In the full discharge operation mode, the absolute value of the discharge pressure data is relatively large, and because water is incompressible and viscous, it is easy to detect pulsating behavior. In light of this, in this embodiment, the pulsating component is extracted from the discharge pressure data acquired during the period in which the operation mode is specified as the full discharge operation mode, and the presence or absence of interference inside the vertical shaft mixed flow pump 1 is diagnosed based on the extracted pulsating component.

[0056] The physical quantity data stored in the server device 70 may be updated by adding information output as a result of the calculation process performed in the diagnosis step #30, such as the amplitude of the rotation frequency component extracted based on the physical quantity data in the air operation mode and the pulsating component extracted based on the physical quantity data in the total discharge operation mode, to the physical quantity data at each time. In this case, since information including the diagnosis result is accumulated, it is easy to manage the operating tendency of the vertical shaft mixed flow pump 1. For example, based on the tendency of the value of the amplitude of the rotation frequency component, it is possible to detect early the ingestion, deformation, damage, etc. of foreign matter in the rotary drive unit of the vertical shaft mixed flow pump 1. As another example, based on the tendency of the value of the pulsating component, it is possible to detect early the occurrence of events such as the widening of the gap between the impeller 11 and the casing and the deformation (wear, chipping, etc.) of the impeller 11. In this way, since the occurrence or sign of an abnormality can be detected early, it is possible to perform planned maintenance of the vertical shaft mixed flow pump 1.

[0057] Other embodiments Finally, other embodiments of the management method and management program according to the present invention will be described. Note that the configurations disclosed in the following embodiments can be combined with the configurations disclosed in other embodiments as long as no contradiction occurs.

[0058] In the above embodiment, an example has been described in which the management method and management program according to the present invention are applied to the management of a vertical shaft mixed-flow pump 1. However, the vertical shaft pump to be managed by the management method and management program according to the present invention is not limited as long as it is a vertical shaft pump having multiple operation modes based on the water level. Examples of such vertical shaft pumps include the vertical shaft mixed-flow pumps exemplified above, as well as vertical shaft axial flow pumps and vertical shaft volute pumps.

[0059] In the above embodiment, a management method including an acquisition step #10, a mode specification step #20, and a diagnosis step #30 has been described as an example. However, in the management method according to the present invention, the diagnosis step may or may not be included. Therefore, for example, a management method that only acquires physical quantity data and specifies an operation mode is also an embodiment of the management method according to the present invention.

[0060] In the above embodiment, an example has been described in which a vertical mixed-flow pump 1 that can operate in each of the operation modes of a stop mode, an air operation mode, a gas-liquid mixed operation mode, a total discharge operation mode, and a shutoff operation mode is managed as a managed object of the present invention. However, in a vertical pump that is managed by the present invention, the selectable operation modes are not limited to those described above. Also, only a part of the operation modes listed above may be selectable. For example, a vertical pump of the air-water switching type is typically one in which a stop mode, an air operation mode, a total discharge operation mode, and a shutoff operation mode can be selected, and such a vertical pump may be managed by the present invention.

[0061] In the above embodiment, the mode identification process is described as an example of a configuration in which the stop mode, the air operation mode, the gas-liquid mixed operation mode, the total discharge operation mode, and the shutoff operation mode can be identified. However, the mode identification process according to the present invention can be designed based on the operation modes in which the vertical pump to be managed can operate. For example, when a vertical pump (different from the above embodiment in that the gas-liquid mixed operation mode does not exist) in which the stop mode, the air operation mode, the total discharge operation mode, and the shutoff operation mode can be selected is managed, and the management method according to the above embodiment is modified and applied, the second step #22 may be omitted, and the process may proceed to the third step #23 except when the vertical pump is identified as being in the stop mode in the first step #21 (#21: Yes).

[0062] Furthermore, the operation modes that can be specified in the mode specifying step according to the present invention do not have to cover all the operation modes that can be selected in a vertical pump. For example, if the physical quantity data used in the diagnosis step is limited to physical quantity data acquired in the air operation mode or the total discharge operation mode, it is sufficient to specify only these two operation modes. In this way, the configuration of the mode specifying step can be appropriately changed depending on the configuration of the diagnosis step.

[0063] In the above embodiment, an example has been described in which the vertical-shaft mixed-flow pump 1 is diagnosed based only on the physical quantity data acquired during the period in which the operation mode identified in the mode identification step #20 is the air operation mode or the full discharge operation mode. However, the physical quantity data used in the diagnosis step according to the present invention may be all or a part of the physical quantity data acquired in the acquisition step.

[0064] Regarding other configurations, it should be understood that the embodiments disclosed in this specification are illustrative in all respects and that the scope of the present invention is not limited thereto. A person skilled in the art would easily understand that appropriate modifications are possible without departing from the spirit of the present invention. Therefore, other embodiments modified without departing from the spirit of the present invention are naturally included in the scope of the present invention. [Industrial Applicability]

[0065] The present invention can be used, for example, to diagnose vertical shaft mixed flow pumps installed in drainage pumping stations. [Explanation of symbols]

[0066] 1: Vertical shaft mixed flow pump 10: Main tube 11: Impeller 20: Operation mode switching tube 21: First part of the operation mode switching tube 22: Second part of the operation mode switching tube 23: Opening of the operation mode switching tube 30: Intake bell 40: Discharge bend 50: Drive unit 60: Control panel 61: Pressure sensor 62: Vibration sensor 63: Rotation sensor 65: Communication equipment 70: Server device L: Water surface N1: Mobile phone network N2: Internet T: General-purpose terminal

Claims

1. A method for managing a vertical pump, comprising: an acquisition step of acquiring the physical quantity data; a mode specifying step of specifying an operation mode of the vertical pump based on the physical quantity data; and a diagnosis step of diagnosing a state of the vertical pump based on the physical quantity data, the physical quantity data includes discharge pressure data related to a discharge pressure of the vertical pump and vibration waveform data caused by vibration of the vertical pump, In the mode identifying step, when both the discharge pressure data and the vibration waveform data are below a predetermined threshold value, the vertical pump is identified as being in an air operation mode in which the vertical pump sucks in and discharges gas, and A management method in which, in the diagnosis process, a rotational frequency component of the vertical pump is extracted from the vibration waveform data acquired during a period in which the operating mode is identified as the air operation mode, and whether or not an imbalance has occurred in the vertical pump is diagnosed based on the amplitude of the extracted rotational frequency component.

2. A method for managing a vertical pump, comprising: an acquisition step of acquiring the physical quantity data; a mode specifying step of specifying an operation mode of the vertical pump based on the physical quantity data; and a diagnosis step of diagnosing a state of the vertical pump based on the physical quantity data, the physical quantity data includes discharge pressure data related to a discharge pressure of the vertical pump, In the mode identifying step, when the discharge pressure data exceeds a predetermined threshold, the vertical pump is identified as being in a total discharge operation mode in which the vertical pump sucks in and discharges liquid; In the diagnosis process, a pulsating component is extracted from the discharge pressure data acquired during a period in which the operating mode is identified as the full discharge operating mode, and the presence or absence of interference inside the vertical pump is diagnosed based on the extracted pulsating component.

3. A management program for a vertical pump, which uses physical quantity data based on physical quantities related to the vertical pump, When executed on a computer, An acquisition function for acquiring the physical quantity data; A mode specifying function for specifying an operation mode of the vertical pump based on the physical quantity data; a diagnostic function for diagnosing a state of the vertical pump based on the physical quantity data, the physical quantity data includes discharge pressure data related to a discharge pressure of the vertical pump and vibration waveform data caused by vibration of the vertical pump, In the mode identification function, when the discharge pressure data and the vibration waveform data are both below a predetermined threshold value, the vertical pump is identified as being in an air operation mode in which the vertical pump sucks in and discharges gas; A management program in which, in the diagnostic function, a rotational frequency component of the vertical pump is extracted from the vibration waveform data acquired during a period in which the operating mode is identified as the air operation mode, and whether or not an imbalance has occurred in the vertical pump is diagnosed based on the amplitude of the extracted rotational frequency component.

4. A management program for a vertical pump, which uses physical quantity data based on physical quantities related to the vertical pump, When executed on a computer, An acquisition function for acquiring the physical quantity data; A mode specifying function for specifying an operation mode of the vertical pump based on the physical quantity data; a diagnostic function for diagnosing a state of the vertical pump based on the physical quantity data, the physical quantity data includes discharge pressure data related to a discharge pressure of the vertical pump, In the mode identification function, when the discharge pressure data exceeds a predetermined threshold value, the vertical pump is identified as being in a total discharge operation mode in which the vertical pump sucks in and discharges liquid; A management program in which, in the diagnostic function, a pulsating component is extracted from the discharge pressure data acquired during a period in which the operating mode is identified as the full discharge operating mode, and the presence or absence of interference inside the vertical pump is diagnosed based on the extracted pulsating component.

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