JPWO2019106928A1 - Abnormality determination system and abnormality determination method for pumping device - Google Patents

Abstract

The abnormality determination system 100 intermittently controls the drain of the tank 4 by repeating a tank 4 for storing the drain, a storage mode for temporarily storing the drain from the tank 4, and a pumping mode for pumping the stored drain by steam. Pumping device 1 for selectively pumping, a water level sensor 5 for detecting the amount of drain stored in the tank 4, a pressure sensor 6 for detecting the intermittent operation of the pumping device 1 in the storage mode and the pumping mode, and an abnormality of the pumping device 1. And a judgment unit 7 for judging. When the water level of the drain detected by the water level sensor 5 exceeds the predetermined first water level threshold L1 or the second water level threshold L2 and the pressure sensor 6 does not detect the intermittent operation, the determination unit 7 It is determined that it is abnormal.

Description

  The technology disclosed herein relates to an abnormality determination system and an abnormality determination method for a pressure feeding device.

  Conventionally, a pumping device for pumping a liquid is known. For example, Patent Document 1 discloses condensate recovery including a pumping device that intermittently pumps liquid by repeating a storage mode in which liquid is temporarily stored and a pumping mode in which the stored liquid is pumped by working gas. An apparatus is disclosed. This condensate recovery device includes a plurality of pressure feeding devices, and even if the filter of one pressure feeding device is clogged, the other pressure feeding device functions normally, so that the liquid pressure feeding can be continued.

JP 2011-85325 A

  By the way, when an abnormality occurs in the pressure feeding device as described above, it is necessary to resolve the abnormality at an early stage. However, there is a state in which the liquid feeding apparatus that intermittently pumps the liquid does not pump the liquid. In such a case, it is difficult to determine whether the liquid feeding apparatus is normal or abnormal.

  The technology disclosed herein has been made in view of such a point, and an object thereof is to accurately determine an abnormality of a pumping device that intermittently pumps liquid.

  The abnormality determination system for a pressure feeding device disclosed herein repeats a tank for storing liquid, a storage mode for temporarily storing the liquid from the tank, and a pressure feeding mode for pumping the stored liquid using a working gas. A pressure-feeding device that intermittently pumps the liquid in the tank; a first detection unit that detects a storage amount of the liquid in the tank; and a first detection unit that detects an intermittent operation of the storage mode and the pressure-feeding mode of the pressure-feeding device. 2 detection units and a determination unit for determining an abnormality of the pumping device, wherein the determination unit has a liquid storage amount detected by the first detection unit exceeding a predetermined threshold value, and the second detection When the intermittent operation is not detected by the unit, it is determined that the pumping device is abnormal.

  The abnormality determination method for the pressure feeding device disclosed herein repeats the storage mode for temporarily storing the liquid from the tank for storing the liquid and the pressure feeding mode for pumping the stored liquid with the working gas. A method for determining an abnormality of a pumping device that intermittently pumps liquid, the step of detecting a storage amount of the liquid in the tank, and a step of detecting an intermittent operation of the storage mode and the pumping mode of the pumping device; And determining the abnormality of the pumping device, and in the step of determining the abnormality, the pumping device is abnormal when the amount of liquid storage exceeds a predetermined threshold and the intermittent operation is not detected. Judge that there is.

  According to the abnormality determination system for the pressure feeding device, it is possible to accurately determine the abnormality of the pressure feeding device that intermittently pumps the liquid.

  According to the abnormality determination method for the pressure feeding device, it is possible to accurately determine the abnormality of the pressure feeding device that intermittently pumps the liquid.

FIG. 1 is a diagram showing a schematic configuration of an abnormality determination system for a pressure feeding device. FIG. 2 is a flowchart showing the contents of determination control.

  Hereinafter, exemplary embodiments will be described in detail with reference to the drawings. FIG. 1 is a diagram illustrating a schematic configuration of an abnormality determination system 100 of the pressure feeding device 1.

  The abnormality determination system 100 includes a tank 4 that stores drain (condensate), two pumping devices 1 that intermittently pump the drain of the tank 4, a water level sensor 5 that detects the amount of drain stored in the tank 4, A pressure sensor 6 that detects the pressure inside the pumping device 1 and a determination unit 7 that determines an abnormality of the pumping device 1 are provided.

  When the two pumping apparatuses 1 are distinguished, they are referred to as “first pumping apparatus 1A” and “second pumping apparatus 1B”, respectively. The basic configuration of the first pumping device 1A and the second pumping device 1B is the same. Therefore, regarding the common configuration, the first pumping device 1A and the second pumping device 1B are simply described as the pumping device 1 without distinguishing between them.

  The pressure feeding device 1 and the tank 4 are provided in, for example, a steam system. The tank 4 collects and stores the drain generated by the condensation of steam. The pumping device 1 pumps the drain stored in the tank 4 to a boiler or a waste heat utilization device. That is, the drain is an example of a liquid that is pumped by the pumping device 1.

  A drain supply pipe 41 is connected to the tank 4. Drain flows into the tank 4 through a drain supply pipe 41. The water level sensor 5 detects the water level of the drain stored in the tank 4. The water level of the drain corresponds to the amount of drain stored. That is, the water level sensor 5 is an example of a first detection unit that detects the amount of drain storage in the tank 4.

  The pumping device 1 includes a casing 10 in which a drain storage space 11 is formed, and a valve mechanism 3 that switches between introduction of steam as working gas into the storage space 11 and stop of introduction of steam. Steam is supplied to the pressure feeding device 1. The pumping apparatus 1 intermittently pumps the drain of the tank 4 by repeating a storage mode in which the drain from the tank 4 is temporarily stored and a pumping mode in which the stored drain is pumped with steam.

  The casing 10 is provided with a liquid inlet 13 through which drain flows, a liquid outlet 14 through which drain flows out, a gas inlet 15 through which steam is introduced, and a gas outlet 16 through which steam is discharged. Yes. The liquid inlet 13, the liquid outlet 14, the gas inlet 15 and the gas outlet 16 are in communication with the storage space 11.

  The liquid inlet 13 is provided in a relatively upper part of the casing 10. The liquid inlet 13 is connected to the downstream end of the inflow pipe 21. The upstream side of the inflow pipe 21 is connected to the tank 4. An inlet 22 that opens into the tank 4 is formed at the upstream end of the inflow pipe 21. The inflow pipe 21 is provided with a check valve 23 that allows a drain flow from the tank 4 to the casing 10 and prevents the reverse flow. That is, the drain of the tank 4 flows into the inflow pipe 21 from the inlet 22, flows through the inflow pipe 21, and flows into the storage space 11 of the casing 10 from the liquid inlet 13. The liquid outlet 14 is provided in a relatively lower part of the casing 10. An outflow pipe 24 is connected to the liquid outlet 14. The outflow pipe 24 is provided with a check valve 25 that allows a drain flow from the casing 10 and prevents the reverse flow. That is, the drain in the storage space 11 flows out to the outflow pipe 24 via the liquid outlet 14 and flows through the outflow pipe 24 toward the downstream side.

  The inflow pipe 21A and the inflow port 22A of the first pumping device 1A and the inflow pipe 21B and the inflow port 22B of the second pumping device 1B have the same basic functions, but have a slightly different configuration. This will be described later. Here, a common “inflow pipe 21” and “inflow port 22” are described.

  The gas inlet 15 and the gas outlet 16 are provided close to each other in the relatively upper part of the casing 10. A supply pipe 26 to which steam is supplied is connected to the gas inlet 15. A discharge pipe 27 through which steam is discharged is connected to the gas discharge port 16.

  The valve mechanism 3 is provided in the gas inlet 15 and the gas outlet 16 in the casing 10. The valve mechanism 3 switches between introduction of steam into the storage space 11 and stop of introduction of steam by opening and closing the gas inlet 15 and the gas outlet 16. Specifically, the valve mechanism 3 includes a main body 31 including a valve body (not shown), a float 32, and an arm 33 that connects the main body 31 and the float 32. The float 32 is formed in a hollow spherical shape and floats on the drain of the storage space 11. The float 32 is fixed to one end of the arm 33. The other end of the arm 33 is rotatably supported by the main body 31.

  The float 32 moves up and down according to the water level of the drain in the storage space 11, that is, the storage amount. In conjunction with this, the arm 33 also rotates. In response to the rotation of the arm 33, the valve body in the main body 31 operates to switch between opening and closing of the gas inlet 15 and the gas outlet 16. The valve mechanism 3 opens the gas inlet 15 and closes the gas outlet 16 when the float 32 rises to a predetermined first position (a position indicated by a two-dot chain line in the drawing). Thereby, steam is introduced into the storage space 11 via the gas inlet 15. On the other hand, the valve mechanism 3 closes the gas inlet 15 and opens the gas outlet 16 when the float 32 is lowered to the second position (the position indicated by the solid line in the drawing) lower than the first position. Thereby, the introduction of the steam into the storage space 11 is stopped, and the storage space 11 and the discharge pipe 27 communicate with each other.

  A pressure sensor 6 is attached to the casing 10. The pressure sensor 6 detects the pressure in the storage space 11 of the casing 10.

  Next, the operation of the pressure feeding device 1 will be described. The basic operation of the first pumping device 1A and the second pumping device 1B is the same.

  When the drainage of the storage space 11 is small, the float 32 is located relatively below the storage space 11. At this time, the gas inlet 15 is closed and the gas outlet 16 is opened. That is, the introduction of steam into the storage space 11 is stopped. When the water level of the tank 4 is higher than the inlet 22 of the inflow pipe 21, the drain of the tank 4 flows into the inflow pipe 21 and further flows into the storage space 11 through the inflow pipe 21 and the liquid inlet 13. To do. The drain that flows in is stored in the storage space 11. Thus, the operation mode in which the introduction of steam into the storage space 11 is stopped and the drain is stored in the storage space 11 is referred to as “storage mode”. In the storage mode, the water level of the drain in the storage space 11 gradually increases, and the float 32 also increases accordingly. At this time, the steam existing above the drain in the storage space 11 is discharged from the gas discharge port 16.

  When the float 32 rises to the first position, the arm 33 connected to the float 32 operates the valve body in the main body 31, the gas inlet 15 is opened, and the gas outlet 16 is closed. Then, the vapor is introduced into the storage space 11, more specifically, the upper space of the drain through the gas introduction port 15. As a result, the drain in the storage space 11 is pushed by the vapor and is pumped from the liquid outlet 14. In this way, an operation mode in which steam is introduced into the storage space 11 and the drain of the storage space 11 is pumped by steam is referred to as a “pressure feeding mode”. In the pumping mode, the drain water level in the storage space 11 gradually decreases as the drain is pumped, and the float 32 also descends accordingly.

  When the float 32 is lowered to the second position, the arm 33 connected to the float 32 operates the valve body in the main body 31, the gas inlet 15 is closed, and the gas outlet 16 is opened. That is, the pumping mode is switched to the storage mode.

  Thus, the pumping apparatus 1 intermittently pumps the drain of the tank 4 by repeating the storage mode and the pumping mode. Depending on the amount of drain that flows into the tank 4, the storage mode and the pumping mode are switched, for example, at a cycle of several tens of seconds.

  Thus, when the storage mode and the pumping mode are repeated, the pressure in the storage space 11 fluctuates according to the repetition of the storage mode and the pumping mode. Specifically, the pressure during the storage mode is low, and when the mode is switched to the pumping mode, the pressure rapidly increases. The pressure is high during the pumping mode, and when switching to the storage mode, the pressure drops rapidly. The pressure sensor 6 detects the pressure that varies in this way. That is, the pressure sensor 6 substantially detects intermittent operation in the storage mode and the pressure feed mode. The pressure sensor 6 is an example of a second detection unit.

  The description of the operation so far is common to the first pumping device 1A and the second pumping device 1B. However, the height of the inlet 22 of the inflow pipe 21 in the tank 4 differs between the first pumping device 1A and the second pumping device 1B. The inlet 22 </ b> A of the first pressure feeding device 1 </ b> A is located at a relatively low position in the tank 4. On the other hand, the inlet 22 </ b> B of the second pumping device 1 </ b> B is located at a relatively high position in the tank 4. Therefore, when the water level of the tank 4 is higher than the inlet 22A and lower than the inlet 22B, only the first pumping device 1A operates as described above to pump the drain. On the other hand, when the water level of the tank 4 is higher than the inlet 22B, the second pumping device 1B operates in the above-described manner in addition to the first pumping device 1A, and pumps the drain. For example, when the drain supply amount from the drain supply pipe 41 is increased and the drain storage amount of the tank 4 is increased, the second pumping device 1B is activated in addition to the first pumping device 1A. Increase pumping capacity. Or when abnormality arises in the 1st pumping apparatus 1A and the drain storage amount of the tank 4 increases, the 2nd pumping apparatus 1B act | operates and pumps a drain instead of the 1st pumping apparatus 1A.

  Next, the determination unit 7 will be described.

  The determination unit 7 has a processor. Detection results of the water level sensor 5 and the pressure sensor 6 are input to the determination unit 7. The determination unit 7 determines the abnormality of the first pumping device 1A and the second pumping device 1B based on the detection results of the water level sensor 5 and the pressure sensor 6.

  Determination control by the determination unit 7 will be described with reference to FIG. FIG. 2 is a flowchart showing the contents of determination control. The determination unit 7 periodically performs the determination control shown in FIG.

  First, the determination part 7 performs operation | movement determination of 1 A of 1st pumping apparatuses in step S1. That is, it is determined whether or not the first pumping device 1A performs intermittent operation between the storage mode and the pumping mode. Specifically, the determination unit 7 determines, based on the detection result of the pressure sensor 6, whether one set of sudden increase and decrease in pressure in the storage space 11 has been performed within a predetermined period (for example, several tens of seconds). . As described above, the sudden increase in the pressure in the storage space 11 represents a switch from the storage mode to the pumping mode. A sudden drop in the pressure of the storage space 11 represents a switch from the pumping mode to the storage mode. For this reason, the fact that one set of sudden rise and fall of the pressure in the storage space 11 is performed within a predetermined period indicates that the intermittent operation in the storage mode and the pumping mode is being performed. Step S1 corresponds to a step of detecting an intermittent operation of the storage mode and the pumping mode of the pumping device.

  As a result of the operation determination, when the first pumping device 1A performs an intermittent operation, no abnormality has occurred in the first pumping device 1A, so the determination unit 7 proceeds to step S4, and the second pumping device 1B Abnormality judgment is performed.

  On the other hand, as a result of the operation determination, when the first pumping device 1A is not performing the intermittent operation, the determination unit 7 determines the water level of the tank 4 in step S2. Specifically, the determination unit 7 determines whether or not the water level is higher than a predetermined first water level threshold L1. The first water level threshold L1 is set to a water level lower than the inlet 22B and slightly higher than the inlet 22A. That is, the first water level threshold L1 is set to a water level at which the drain of the tank 4 can flow into the inflow port 22A. Step S2 corresponds to a step of detecting the amount of liquid stored in the tank.

  When the water level in the tank 4 is higher than the first water level threshold L1, the determination unit 7 determines in step S3 that an abnormality has occurred in the first pumping device 1A. And the determination part 7 alert | reports abnormality of 1 A of 1st pumping apparatuses outside. For example, the determination unit 7 turns on an alarm lamp or the like that indicates an abnormality of the first pumping device 1A. Step S3 corresponds to a step of determining abnormality of the pressure feeding device.

  Then, the determination part 7 progresses to step S4, and performs abnormality determination of the 2nd pumping apparatus 1B.

  On the other hand, when the water level of the tank 4 is equal to or lower than the first water level threshold L1, the determination unit 7 determines that no abnormality has occurred in the first pumping device 1A. That is, when the water level in the tank 4 is equal to or less than the first water level threshold L1, the drain amount in the tank 4 is small, so the first pumping device 1A continues the storage mode for a long time and slightly drains into the storage space 11. It is thought that it is accumulating one by one or stopped in the accumulation mode. In this case, the first pumping device 1A does not perform the intermittent operation, but the cause is the small amount of drain in the tank 4. Therefore, the determination unit 7 determines that no abnormality has occurred in the first pumping device 1A.

  When the water level in the tank 4 is equal to or lower than the first water level threshold L1, the water level in the tank 4 is naturally lower than the inflow port 22B, so the second pumping device 1B does not perform an intermittent operation. Therefore, the determination part 7 complete | finishes this determination control, without performing abnormality determination of the 2nd pumping apparatus 1B.

  Next, the determination part 7 performs operation | movement determination of the 2nd pumping apparatus 1B in step S4. That is, it is determined whether or not the second pumping device 1B performs intermittent operation between the storage mode and the pumping mode. The determination method is the same as that of the first pumping device 1A. Step S4 corresponds to a step of detecting an intermittent operation of the storage mode and the pumping mode of the pumping device.

  As a result of the operation determination, when the second pumping device 1B performs an intermittent operation, no abnormality has occurred in the second pumping device 1B, and therefore the determination unit 7 ends the current determination control.

  On the other hand, as a result of the operation determination, when the second pumping device 1B is not performing the intermittent operation, the determination unit 7 determines the water level of the tank 4 in step S5. Specifically, the determination unit 7 determines whether or not the water level is higher than a predetermined second water level threshold L2. The second water level threshold L2 is a water level slightly higher than the inflow port 22B. That is, the second water level threshold L2 is set to a water level at which the drain of the tank 4 can flow into the inflow port 22B. Step S5 corresponds to a step of detecting the amount of liquid stored in the tank.

  When the water level in the tank 4 is higher than the second water level threshold L2, the determination unit 7 determines in step S6 that an abnormality has occurred in the second pumping device 1B. And the determination part 7 alert | reports the abnormality of the 2nd pumping apparatus 1B to the exterior. For example, the determination unit 7 turns on an alarm lamp or the like that indicates an abnormality of the second pumping device 1B. Thereafter, the determination unit 7 ends the current determination control. Step S6 corresponds to a step of determining abnormality of the pressure feeding device.

  On the other hand, when the water level of the tank 4 is equal to or lower than the second water level threshold L2, the determination unit 7 determines that no abnormality has occurred in the second pumping device 1B. That is, when the water level in the tank 4 is equal to or lower than the second water level threshold L2, the amount of drain in the tank 4 is small. Therefore, the second pumping device 1B continues the storage mode for a long time and slightly drains into the storage space 11. It is thought that it is accumulating one by one or stopped in the accumulation mode. In this case, the second pumping device 1B does not perform the intermittent operation, but the cause is that the drain amount of the tank 4 is small. Therefore, the determination unit 7 determines that no abnormality has occurred in the second pumping device 1B. Thereafter, the determination unit 7 ends the current determination control.

  The determination unit 7 periodically monitors the occurrence of an abnormality in the first pumping device 1A and the second pumping device 1B by periodically repeating the above determination control.

  Thus, even if the pumping apparatus 1 is in a normal state, the intermittent operation may temporarily stop due to the amount of drain flowing into the storage space 11. The abnormality determination system 100 accurately determines the abnormality of the pressure feeding device 1 by considering not only the presence / absence of the intermittent operation of the pressure feeding device 1 but also the storage amount of drain in the tank 4.

  As described above, the abnormality determination system 100 includes the tank 4 for storing drain (liquid), the storage mode for temporarily storing drain from the tank 4, and the pressure feeding mode for pumping the stored drain by steam (working gas). , By repeating the above, the pumping device 1 that intermittently pumps the drain of the tank 4, the water level sensor 5 (first detection unit) that detects the drain storage amount of the tank 4, the storage mode of the pumping device 1 and A pressure sensor 6 (second detection unit) that detects intermittent operation in the pumping mode and a determination unit 7 that determines an abnormality of the pumping device 1 are provided. The determination unit 7 detects the water level of the drain (detected by the water level sensor 5). When the stored amount) exceeds a predetermined first water level threshold value L1 or the second water level threshold value L2 (threshold value) and the intermittent operation is not detected by the pressure sensor 6, it is determined that the pumping device 1 is abnormal.

  In other words, the abnormality determination method of the abnormality determination system 100 includes a storage mode for temporarily storing drain from the tank 4 for storing drain (liquid), and a pumping mode for pumping the stored drain by steam (working gas). It is an abnormality determination method for the pumping device 1 that intermittently pumps the drain of the tank 4 by repeating the process of detecting the storage amount of the drain of the tank 4 and the intermittent operation of the storage mode and the pumping mode of the pumping device 1. The step of detecting the operation and the step of determining the abnormality of the pumping apparatus 1 include the step of determining the abnormality. In the step of determining the abnormality, the drain water level (reserved amount) exceeds a predetermined water level threshold (threshold), and the intermittent operation When not detected, it determines with the pressure feeding apparatus 1 being abnormal.

  According to this configuration, it is not determined that the pressure feeding device 1 is abnormal only when the pressure feeding device 1 is not intermittently operated, and the amount of drain stored in the tank 4 is taken into consideration. When the amount of drain storage in the tank 4 is small, the intermittent operation of the pressure feeding device 1 may be temporarily stopped. Therefore, the determination unit 7 determines that the pumping device 1 is abnormal when the pumping device 1 is not intermittently operated despite the large amount of drain stored in the tank 4. Thereby, the determination part 7 can determine the abnormality of the pumping apparatus 1 exactly.

  Further, the pressure feeding device 1 includes a casing 10 in which a drain storage space 11 is formed, and a valve mechanism 3 that switches between introduction of steam into the storage space 11 and stop of introduction of steam. While the introduction of the steam to the storage space 11 is stopped by the mechanism 3 and the drain from the tank 4 is stored in the storage space 11, in the pressure feed mode, the steam is introduced into the storage space 11 by the valve mechanism 3 and the storage space 11 Drain is pumped by steam.

  According to this configuration, the configuration of the pressure feeding device 1 is specifically specified. Specifically, the introduction of the steam and the stop of the introduction of the steam are switched to the storage space 11 by the valve mechanism 3. In the storage mode, the introduction of steam into the storage space 11 is stopped, while in the pressure feed mode, steam is introduced into the storage space 11.

  Furthermore, the pressure sensor 6 detects an intermittent operation by detecting the pressure in the storage space 11.

  According to this configuration, the pressure sensor 6 indirectly detects the intermittent operation of the pressure feeding device 1 by detecting the pressure in the storage space 11. That is, as described above, in the storage mode, since the introduction of steam into the storage space 11 is stopped, the pressure in the storage space 11 is relatively low. On the other hand, in the pressure feeding mode, since the steam is introduced into the storage space 11, the pressure in the storage space 11 is relatively high. Therefore, it is possible to determine whether the storage mode or the pumping mode is in accordance with the pressure of the storage space 11. Furthermore, it is possible to determine whether the intermittent operation between the storage mode and the pumping mode is performed based on the pressure fluctuation in the storage space 11.

  Also, a plurality of pumping devices 1 are provided, and the plurality of pumping devices 1, that is, the first pumping device 1A and the second pumping device 1B are connected to the tank 4 via the inflow pipes 21A and 21B, respectively. The pipes 21A and 21B open into the tank 4, have inlets 22A and 22B into which the drain of the tank 4 flows, and are connected to the first pumping device 1A and the second pumping device 1B. The heights of the inlets 22A and 22B are different from each other, and the determination unit 7 determines the drain water level threshold when determining the abnormality of the pressure feeding device 1 for each pressure feeding device 1 having a different height of the inlet 22. change.

  According to this configuration, the first pumping device 1A and the second pumping device 1B are connected to the tank 4 via the inflow pipes 21A and 21B, respectively. The heights of the inlets 22A and 22B of the inflow pipes 21A and 21B are different from each other. That is, the first pumping device 1A and the second pumping device 1B have different water levels in the tank 4 into which the drain flows through the inlets 22A and 22B. For this reason, the determination unit 7 changes the drain water level threshold when determining the abnormality between the first pumping device 1A and the second pumping device 1B. Thereby, abnormality determination can be performed using an appropriate water level threshold value for each pumping device 1 having different water levels into which drain flows.

<< Other Embodiments >>
As described above, the embodiment has been described as an example of the technique disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to an embodiment in which changes, replacements, additions, omissions, and the like are appropriately performed. Moreover, it is also possible to combine each component demonstrated by the said embodiment and it can also be set as a new embodiment. In addition, among the components described in the attached drawings and detailed description, not only the components essential for solving the problem, but also the components not essential for solving the problem in order to illustrate the technology. May also be included. Therefore, it should not be immediately recognized that these non-essential components are essential as those non-essential components are described in the accompanying drawings and detailed description.

  For example, the abnormality determination system 100 includes two pumping devices 1, but the number of the pumping devices 1 is not limited to two. There may be one pumping device 1 or three or more.

  The liquid pumped by the pumping device 1 is not limited to drain. The pumping device 1 can pump any liquid. Moreover, the working gas of the pressure feeding device 1 is not limited to steam. The working gas may be any gas, for example, compressed air.

  The configuration of the pressure feeding mechanism 1 is only an example. The pumping mechanism 1 can have any configuration as long as the liquid is pumped by repeating the storage mode and the pumping mode.

  As long as the amount of liquid stored in the tank 1 can be detected, a detection unit other than the water level sensor 5 may be employed as the first detection unit.

  In addition, as long as the intermittent operation of the storage mode and the pumping mode of the pumping device 1 can be detected, a detection unit other than the pressure sensor 6 may be employed as the second detection unit. For example, a proximity switch or the like provided in the casing 10 that detects the movement of the float 32 to the first position may be used as the second detection unit. As the float 32 moves to the first position, the storage mode is switched to the pumping mode, so that the intermittent operation of the pumping device 1 can be detected.

  The determination unit 7 determines that the intermittent operation is being performed by performing one set of rapid increase and decrease of the pressure in the storage space 11 within a predetermined period, but is not limited thereto. For example, the determination unit 7 may determine that the intermittent operation is being performed by performing either a sudden rise or a sudden drop in the pressure of the storage space 11 within a predetermined period. In particular, since the pumping mode is terminated when the drainage of the storage space 11 decreases, it is rarely continued for a long period of time. If it continues for a long time, it is a storage mode. That is, it is possible to determine whether or not the intermittent operation of the pressure feeding device 1 is appropriately performed depending on whether or not the storage mode ends in a predetermined period. From this point of view, the determination unit 7 may determine that the intermittent operation is being performed when the pressure of the storage space 11 is rapidly increased within a predetermined period.

  As described above, the technology disclosed herein is useful for an abnormality determination system and an abnormality determination method for a pressure feeding device.

DESCRIPTION OF SYMBOLS 100 Abnormality determination system 1A 1st pumping apparatus 1B 2nd pumping apparatus 10 Casing 11 Storage space 21A, 21B Inflow pipe 22A, 22B Inlet 3 Valve mechanism 4 Tank 5 Water level sensor (1st detection part)
6 Pressure sensor (second detector)
7 Judgment part

Claims (5)

A tank for storing liquid;
A pumping device for intermittently pumping the liquid in the tank by repeating a storage mode for temporarily storing the liquid from the tank and a pumping mode for pumping the stored liquid by working gas;
A first detector for detecting the amount of liquid stored in the tank;
A second detector for detecting intermittent operation of the storage mode and the pumping mode of the pumping device;
A determination unit for determining an abnormality of the pumping device,
The determination unit determines that the pumping device is abnormal when the amount of liquid stored detected by the first detection unit exceeds a predetermined threshold and the intermittent operation is not detected by the second detection unit. Abnormality judgment system for pressure feeding device to judge. In the abnormality determination system of the pressure feeding device according to claim 1,
The pumping device is
A casing in which a liquid storage space is formed, and a valve mechanism that switches between introduction of the working gas into the storage space and stop of the introduction of the working gas,
In the storage mode, the valve mechanism stops the introduction of the working gas to the storage space and stores the liquid from the tank in the storage space,
In the pumping mode, an abnormality determination system for a pumping device that introduces a working gas into the storage space by the valve mechanism and pumps the liquid in the storage space with the working gas. In the abnormality determination system of the pressure feeding device according to claim 2,
The said 2nd detection part is the abnormality determination system of the pumping apparatus which detects the said intermittent operation | movement by detecting the pressure of the said storage space. In the abnormality determination system of the pumping device according to any one of claims 1 to 3,
A plurality of the pressure feeding devices are provided,
Each of the plurality of pumping devices is connected to the tank via an inflow pipe,
The inlet pipe has an inlet opening into the tank and into which the liquid of the tank flows;
The heights of the inlets of the inflow pipes connected to the plurality of pumping devices are different from each other,
The determination unit is an abnormality determination system for a pumping device that changes the threshold value of the liquid storage amount when determining an abnormality of the pumping device for each pumping device having a different height of the inlet. Abnormality determination method for a pumping device that intermittently pumps the liquid in the tank by repeating a storage mode for temporarily storing the liquid from the tank for storing the liquid and a pumping mode for pumping the stored liquid with the working gas. Because
Detecting the amount of liquid stored in the tank;
Detecting the intermittent operation of the storage mode and the pumping mode of the pumping device;
And determining an abnormality of the pumping device,
In the step of determining the abnormality, the abnormality determination method of the pressure feeding device that determines that the pressure feeding device is abnormal when the liquid storage amount exceeds a predetermined threshold value and the intermittent operation is not detected.

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