WO2019106928A1

WO2019106928A1 - Abnormality determination system and abnormality determination method for pressure-feeding apparatus

Info

Publication number: WO2019106928A1
Application number: PCT/JP2018/035581
Authority: WO
Inventors: 松永和紀
Original assignee: 株式会社テイエルブイ
Priority date: 2017-11-30
Filing date: 2018-09-26
Publication date: 2019-06-06
Also published as: JP6542495B1; JPWO2019106928A1

Abstract

An abnormality determination system 100 is provided with: a tank 4 that stores drainage; a pressure-feeding apparatus 1 that intermittently pressure-feeds the drainage in the tank 4 by repeating a storage mode for temporarily storing the drainage from the tank 4 and a pressure-feeding mode for pressure-feeding the stored drainage by steam; a water level sensor 5 that detects the storage amount of the drainage in the tank 4; pressure sensors 6 that detect intermittent operation of the pressure-feeding apparatus 1 in the storage mode and the pressure-feeding mode; and a determination unit 7 that performs determination as to abnormality of the pressure-feeding apparatus 1. If the water level of drainage detected by the water level sensor 5 exceeds a predetermined first water level threshold value L1 or a predetermined second water level threshold value L2 and intermittent operation is not detected by the pressure sensors 6, the determination unit 7 determines that an abnormality is present in the pressure-feeding apparatus 1.

Description

Failure determination system and failure determination method for pumping apparatus

The technology disclosed herein relates to an abnormality determination system and an abnormality determination method for a pumping apparatus.

DESCRIPTION OF RELATED ART Conventionally, the pumping apparatus which pumps a liquid is known. For example, Patent Document 1 discloses a condensate recovery system including a pumping device for intermittently pumping a liquid by repeating a storage mode for temporarily storing the liquid and a pumping mode for pumping the stored liquid using a working gas. An apparatus is disclosed. This condensed water recovery device is equipped with a plurality of pumping devices, and even if the filter of one pumping device is clogged, the other pumping device functions normally, so that the pumping of liquid can be continued.

JP 2011-85325 A

By the way, when an abnormality occurs in the pumping apparatus as described above, it is necessary to eliminate the abnormality at an early stage. However, there is also a state where the liquid is not pumped by the pumping device that pumps the liquid intermittently, and in such a case, it is difficult to determine whether the pumping device is normal or abnormal.

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

The abnormality determination system for a pumping device disclosed herein comprises repeating a tank for storing liquid, a storage mode for temporarily storing liquid from the tank, and a pumping mode for pumping the stored liquid with working gas. A pumping device for intermittently pumping the liquid in the tank, a first detection unit for detecting the storage amount of the liquid in the tank, and an intermittent operation in the storage mode and the pumping mode of the pumping device And a determination unit that determines an abnormality of the pumping device, wherein the determination unit determines that the storage amount of the liquid detected by the first detection unit exceeds a predetermined threshold, and the second detection When the intermittent operation is not detected by the unit, it is determined that the pumping device is abnormal.

In the method of determining abnormality of the pumping device disclosed herein, the method of repeating the storage mode for temporarily storing the liquid from the tank for storing the liquid and the pumping mode for pumping the stored liquid by the working gas is repeated. A method of determining abnormality of a pumping apparatus for intermittently pumping a liquid, comprising: detecting a storage amount of liquid in the tank; detecting an intermittent operation of the storage mode and the pumping mode of the pumping apparatus; The step of determining an abnormality of the pumping device, wherein the step of determining the abnormality includes an abnormality in the pumping device when the amount of stored liquid exceeds a predetermined threshold and the intermittent operation is not detected. Determine that there is.

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

According to the abnormality determination method of 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 of a pumping apparatus. FIG. 2 is a flowchart showing the contents of determination control.

Hereinafter, exemplary embodiments will be described in detail based on the drawings. FIG. 1 is a view showing a schematic configuration of an abnormality determination system 100 of the pumping apparatus 1. As shown in FIG.

The abnormality determination system 100 includes a tank 4 for storing drain (condensed water), two pumping devices 1 for intermittently pumping the drain of the tank 4, and a water level sensor 5 for detecting the storage amount of drain of 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 devices 1 are distinguished, they are referred to as "first pumping device 1A" and "second pumping device 1B". The basic configuration of the first pumping device 1A and the second pumping device 1B is the same. Therefore, with regard to the common configuration, the description will be made simply as the pumping device 1 without distinguishing between the first pumping device 1A and the second pumping device 1B.

The pumping device 1 and the tank 4 are provided, for example, in a steam system. The tank 4 recovers and stores drain generated by 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 the liquid that the pumping device 1 pumps.

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

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

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

The liquid inlet 13 is provided at a relatively upper portion of the casing 10. The downstream end of the inflow pipe 21 is connected to the liquid inflow port 13. The upstream side of the inflow pipe 21 is connected to the tank 4. At the upstream end of the inflow pipe 21, an inlet 22 opening to the inside of the tank 4 is formed. Further, the inflow pipe 21 is provided with a check valve 23 which allows the flow of drain from the tank 4 to the casing 10 and prevents the flow of the reverse. That is, the drain of the tank 4 flows into the inflow pipe 21 from the inflow port 22, flows through the inflow pipe 21, and flows into the storage space 11 of the casing 10 from the liquid inflow port 13. The liquid outlet 14 is provided at a relatively lower portion of the casing 10. An outlet pipe 24 is connected to the liquid outlet 14. The outflow pipe 24 is provided with a check valve 25 which permits the flow of drain from the casing 10 and prevents the flow of the reverse. That is, the drain of the storage space 11 flows out to the outflow pipe 24 via the liquid outlet 14, and circulates 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 function but slightly different configurations. The point will be described later. Here, the 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 at a relatively upper portion of the casing 10. The gas inlet 15 is connected to a supply pipe 26 to which steam is supplied. The gas discharge port 16 is connected to a discharge pipe 27 from which steam is discharged.

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 the introduction of the steam into the storage space 11 and the stop of the introduction of the steam by opening and closing the gas inlet 15 and the gas outlet 16. Specifically, the valve mechanism 3 has a main body 31 including a valve body (not shown), a float 32, and an arm 33 connecting the main body 31 and the float 32. The float 32 is formed into a hollow sphere 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 of the storage space 11, that is, the storage amount. In conjunction with this, the arm 33 also pivots. The valve body in the main body 31 operates according to the rotation of the arm 33 to switch the opening and closing of the gas inlet 15 and the gas outlet 16. The valve mechanism 3 opens the gas inlet port 15 and closes the gas outlet port 16 when the float 32 ascends to a predetermined first position (the position indicated by the two-dot chain line in the figure). Thereby, the vapor is introduced into the storage space 11 via the gas inlet 15. On the other hand, the valve mechanism 3 closes the gas inlet port 15 and opens the gas outlet port 16 when the float 32 is lowered to the second position (the position of the solid line in the figure) 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.

Further, 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.

Subsequently, the operation of the pressure-feeding device 1 will be described. The basic operations of the first pumping device 1A and the second pumping device 1B are the same.

When the drain 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 via the inflow pipe 21 and the liquid inlet 13. Do. The drain which has flowed in is stored in the storage space 11. Thus, the operation mode in which the introduction of the steam into the storage space 11 is stopped and the drain is stored in the storage space 11 is referred to as a "storage mode". In the storage mode, the water level of the drain of the storage space 11 rises gradually, and the float 32 also rises accordingly. At this time, the vapor existing above the drain in the storage space 11 is discharged from the gas discharge port 16.

When the float 32 ascends to the first position, the arm 33 connected to the float 32 operates the valve in the main body 31, the gas inlet 15 is opened, and the gas outlet 16 is closed. Then, steam is introduced into the storage space 11, more specifically, the space above the drain through the gas inlet 15. As a result, the drain of the storage space 11 is pushed by the steam and pumped from the liquid outlet 14. Thus, the operation mode in which the steam is introduced into the storage space 11 and the drain of the storage space 11 is pumped by the steam is referred to as a "pumping mode". In the pumping mode, with the pumping of the drain, the water level of the drain of the storage space 11 gradually falls, 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 in the main body 31, the gas inlet 15 is closed, and the gas outlet 16 is opened. That is, the pump mode is switched to the storage mode.

As described above, the pumping device 1 intermittently pumps the drain of the tank 4 by repeating the storage mode and the pumping mode. Although depending on the amount of drain flowing into the tank 4, the storage mode and the pumping mode are switched, for example, in 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 in the storage mode is low, and when switching to the pumping mode, the pressure rapidly rises. The pressure is high during the pumping mode, and the pressure drops sharply when the mode is switched to the storage mode. The pressure sensor 6 detects such fluctuating pressure. That is, the pressure sensor 6 substantially detects the intermittent operation in the storage mode and the pumping mode. The pressure sensor 6 is an example of a second detection unit.

The description of the operation up to this point is common to the first pumping device 1A and the second pumping device 1B. However, the height of the inflow port 22 of the inflow pipe 21 in the tank 4 is different between the first pressure delivery device 1A and the second pressure delivery device 1B. The inlet 22 </ b> A of the first pumping device 1 </ b> A is located at a relatively low position in the tank 4. On the other hand, the inlet 22B of the second pumping device 1B is located at a relatively high position in the tank 4. Therefore, when the water level of the tank 4 is higher than the inflow port 22A and lower than the inflow port 22B, only the first pumping device 1A operates as described above and pumps the drain. On the other hand, when the water level of the tank 4 is higher than the inlet 22B, in addition to the first pumping device 1A, the second pumping device 1B also operates as described above, and pumps the drain. For example, when the drain supply amount from the drain supply pipe 41 increases and the drain storage amount of the tank 4 increases, the second pumping device 1B is activated in addition to the first pumping device 1A, and the whole as a whole Increase pumping capacity. Alternatively, when an abnormality occurs in the first pumping device 1A and the drain storage amount of the tank 4 increases, the second pumping device 1B operates to pump the drain instead of the first pumping device 1A.

Subsequently, 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.

The 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, in step S1, the determination unit 7 determines the operation of the first pumping device 1A. That is, it is determined whether the first pumping device 1A is performing intermittent operation of the storage mode and the pumping mode. Specifically, based on the detection result of the pressure sensor 6, the determination unit 7 determines whether one set of rapid increase and decrease of pressure in the storage space 11 has been performed in a predetermined period (for example, several tens of seconds). . As described above, the rapid increase in pressure of the storage space 11 represents the switching from the storage mode to the pumping mode. The sudden drop in pressure of the storage space 11 represents the switching from the pumping mode to the storage mode. Therefore, the fact that one set of the rapid increase and the rapid decrease of the pressure in the storage space 11 is performed within a predetermined period means that the intermittent operation in the storage mode and the pumping mode is being performed. Step S1 corresponds to the step of detecting the intermittent operation of the storage mode and the pumping mode of the pumping apparatus.

As a result of the operation determination, when the first pumping device 1A is performing intermittent operation, no abnormality occurs in the first pumping device 1A, so the determination unit 7 proceeds to step S4, and the second pumping device 1B Perform an anomaly judgment.

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 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 inlet 22A. Step S2 corresponds to the step of detecting the storage amount of liquid in the tank.

If the water level of the tank 4 is higher than the first water level threshold L1, the determination unit 7 determines in step S3 that the first pumping device 1A has an abnormality. Then, the determination unit 7 reports the abnormality of the first pumping device 1A to the outside. For example, the determination unit 7 lights an alarm lamp or the like that indicates an abnormality in the first pressure delivery device 1A. Step S3 corresponds to a process of determining an abnormality of the pumping apparatus.

Thereafter, the determination unit 7 proceeds to step S4, and performs an abnormality determination of the second pumping device 1B.

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

When the water level of the tank 4 is equal to or less than the first water level threshold L1, the second pumping device 1B does not perform the intermittent operation because the water level of the tank 4 is naturally lower than the inflow port 22B. Therefore, the determination unit 7 ends the current determination control without performing the abnormality determination of the second pumping device 1B.

Next, in step S4, the determination unit 7 determines the operation of the second pumping apparatus 1B. That is, it is determined whether the second pumping device 1B is performing intermittent operation of the storage mode and the pumping mode. The determination method is the same as in the case of the first pumping device 1A. Step S4 corresponds to the step of detecting the intermittent operation of the storage mode and the pumping mode of the pumping apparatus.

As a result of the operation determination, when the second pumping device 1B is performing the intermittent operation, no abnormality occurs in the second pumping device 1B, so the determination unit 7 ends the determination control of this time.

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 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 inlet 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 the step of detecting the storage amount of liquid in the tank.

If 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 the second pumping device 1B has an abnormality. Then, the determination unit 7 reports the abnormality of the second pumping device 1B to the outside. For example, the determination unit 7 lights an alarm lamp or the like that indicates an abnormality in the second pumping device 1B. Thereafter, the determination unit 7 ends the present determination control. Step S6 corresponds to a process of determining an abnormality of the pumping apparatus.

On the other hand, when the water level of the tank 4 is less than or equal to 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 of the tank 4 is equal to or less than the second water level threshold L2, the drain amount of the tank 4 is small, so the second pumping device 1B continues the storage mode for a long period of time and drains a little in the storage space 11 It is considered that it has stored one by one or stopped in the storage mode. In this case, although the second pumping device 1B does not perform the intermittent operation, the cause is the small amount of drain of the tank 4. Therefore, the determination unit 7 determines that no abnormality has occurred in the second pumping device 1B. Thereafter, the determination unit 7 ends the present determination control.

The determination unit 7 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.

As described above, even in the normal state, the pumping apparatus 1 may temporarily stop the intermittent operation due to the relationship of the amount of drain flowing into the storage space 11. The abnormality determination system 100 accurately determines the abnormality of the pumping apparatus 1 by considering not only the presence or absence of the intermittent operation of the pumping apparatus 1 but also the storage amount of the drain of 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 the drain from the tank 4, and the pumping mode for pumping the stored drain with steam (working gas). And the water level sensor 5 (first detection unit) for detecting the storage amount of the drain of the tank 4; and the storage mode of the pumping device 1; The pressure sensor 6 (second detection unit) for detecting intermittent operation in the pumping mode and a determination unit 7 for determining abnormality of the pumping apparatus 1 are provided. The determination unit 7 detects the water level of the drain detected by the water level sensor 5 When the storage amount exceeds the predetermined first water level threshold L1 or second water level threshold L2 (threshold) 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 the drain from the tank 4 for storing the drain (liquid) and a pumping mode for pumping the stored drain with steam (working gas). A method of determining abnormality of the pumping device 1 for intermittently pumping the drain of the tank 4 by repeating, the step of detecting the storage amount of the drain of the tank 4 and the intermittent operation of the reservoir mode and the pumping mode of the pumping device 1 In the step of determining the abnormality, including the step of detecting the operation and the step of determining the abnormality of the pumping device 1, the water level (storage amount) of the drain exceeds a predetermined water level threshold (threshold) and the intermittent operation is If not detected, it is determined that the pumping device 1 is abnormal.

According to this configuration, it is not determined that the pumping device 1 is abnormal only when the pumping device 1 is not performing the intermittent operation, and the storage amount of the drain of the tank 4 is considered. When the storage amount of the drain of the tank 4 is small, the intermittent operation of the pumping device 1 may be temporarily stopped. Therefore, the determination unit 7 determines that the pressure-feeding device 1 is abnormal when the pressure-feeding device 1 does not operate intermittently although the storage amount of the drain of the tank 4 is large. Thereby, the determination unit 7 can accurately determine the abnormality of the pressure feeding device 1.

The pumping apparatus 1 also has a casing 10 in which a storage space 11 for drain is formed, and a valve mechanism 3 that switches between the introduction of steam into the storage space 11 and the stop of the introduction of steam. While the introduction of steam into the storage space 11 is stopped by the mechanism 3 and the drain from the tank 4 is stored in the storage space 11, the steam is introduced into the storage space 11 by the valve mechanism 3 in the pumping mode. Pump the drain with steam.

According to this configuration, the configuration of the pumping device 1 is specifically identified. Specifically, the valve mechanism 3 switches between the introduction of the steam and the stop of the introduction of the steam into the storage space 11. While the introduction of the steam into the storage space 11 is stopped in the storage mode, the steam is introduced into the storage space 11 in the pumping mode.

Furthermore, the pressure sensor 6 detects 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 pumping device 1 by detecting the pressure in the storage space 11. That is, as described above, in the storage mode, the introduction of the steam into the storage space 11 is stopped, so the pressure in the storage space 11 is relatively low. On the other hand, in the pumping mode, since the steam is introduced into the storage space 11, the pressure in the storage space 11 is relatively high. Therefore, the pressure in the storage space 11 can be used to determine whether it is the storage mode or the pumping mode. Furthermore, it is possible to determine whether the intermittent operation of the storage mode and the pumping mode is being performed by the pressure fluctuation of the storage space 11.

Further, 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 in the tank 4 and have

inlets

22A and 22B into which the drain of the tank 4 flows, and the

inlet pipes

21A and 21B connected to the first pumping device 1A and the second pumping device 1B. The heights of the

inflow ports

22A and 22B are different from each other, and the determination unit 7 determines the water level threshold of the drain at the time of determining the abnormality of the pumping device 1 for each pumping device 1 having different heights of the inflow ports 22. change.

According to this configuration, the first pumping device 1A and the second pumping device 1B are connected to the tank 4 through the

inflow pipes

21A and 21B, respectively. The heights of the

inflow ports

22A and 22B of the

inflow pipes

21A and 21B are different from each other. That is, the water level of the tank 4 into which the drain flows in via the

inflow ports

22A and 22B is different between the first pumping device 1A and the second pumping device 1B. Therefore, the determination unit 7 changes the water level threshold value of the drain at the time of the abnormality determination in the first pumping device 1A and the second pumping device 1B. By this, abnormality determination can be performed using an appropriate water level threshold value for each pumping device 1 having a different water level into which the drain flows.

<< Other Embodiments >>
As mentioned above, the said embodiment was described as an illustration of the technique disclosed in this application. However, the technology in the present disclosure is not limited to this, and is also applicable to embodiments in which changes, replacements, additions, omissions, and the like are appropriately made. Moreover, it is also possible to combine each component demonstrated by the said embodiment, and to set it as a new embodiment. Further, among components described in the attached drawings and the detailed description, not only components that are essential for solving the problem but also components that are not essential for solving the problem in order to illustrate the above-mentioned technology. May also be included. Therefore, the fact that those non-essential components are described in the attached drawings and the detailed description should not immediately mean that those non-essential components are essential.

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

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

The configuration of the pumping mechanism 1 is merely an example. The pumping mechanism 1 may have any configuration as long as it pumps the liquid by repeating the storage mode and the pumping mode.

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

Further, as long as the intermittent operation of the storage mode and the pumping mode of the pumping apparatus 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 for detecting the movement of the float 32 to the first position may be used as the second detection unit. Since the storage mode is switched to the pumping mode by the movement of the float 32 to the first position, the intermittent operation of the pumping device 1 can be detected.

Although the determination unit 7 determines that the intermittent operation is being performed based on the fact that one set of the rapid increase and the rapid decrease of the pressure of the storage space 11 is performed within a predetermined period, the invention is not limited thereto. For example, the determination unit 7 may determine that the intermittent operation is being performed on the assumption that any one of the rapid increase and the rapid decrease of the pressure of the storage space 11 is performed within a predetermined period. In particular, since the pumping mode ends when the drain of the storage space 11 decreases, it does not last for a long time. If it continues for a long time, it is a storage mode. That is, it can be determined whether the intermittent operation of the pumping apparatus 1 is properly performed depending on whether the storage mode ends in a predetermined period. From that point of view, the determination unit 7 may determine that the intermittent operation is being performed when the rapid increase in pressure of the storage space 11 is performed 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 pumping apparatus.

100 abnormality determination system 1A first pumping device 1B second pumping device 10 casing 11

storage space

21A,

21B inflow tube

22A, 22B inflow port 3 valve mechanism 4 tank 5 water level sensor (first detection unit)
6 Pressure sensor (second detector)
7 Judgment unit

Claims

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 using a working gas;
A first detection unit that detects the storage amount of liquid in the tank;
A second detection unit that detects intermittent operation of the storage mode and the pumping mode of the pumping device;
A determination unit that determines an abnormality of the pumping device;
The determination unit determines that the pumping device is abnormal when the stored amount of liquid detected by the first detection unit exceeds a predetermined threshold and the second operation unit does not detect the intermittent operation. Abnormality judgment system of the pressure feed device to judge.
In the abnormality determination system for a pumping apparatus according to claim 1,
The pumping device is
It has a casing in which a liquid storage space is formed, and a valve mechanism which switches between the introduction of the working gas into the storage space and the stop of the introduction of the working gas,
In the storage mode, while the introduction of the working gas into the storage space is stopped by the valve mechanism and the liquid from the tank is stored in the storage space,
In the pumping mode, a working gas is introduced into the storage space by the valve mechanism, and a system for determining abnormality in a pumping device that pumps the liquid in the storage space with the working gas.
In the abnormality determination system for a pumping apparatus according to claim 2,
The system for determining abnormality in a pressure feeding device, wherein the second detection unit detects the intermittent operation by detecting the pressure in the storage space.
In the abnormality determination system for a pumping device according to any one of claims 1 to 3,
A plurality of the pumping devices are provided,
Each of the plurality of pumping devices is connected to the tank via an inflow pipe,
The inflow pipe is open to the inside of the tank and has an inlet through which liquid in the tank flows.
The heights of the inlets of the inflow tubes connected to the plurality of pumping devices are different from one another,
The failure determination system of a pumping apparatus, wherein the determination unit changes the threshold value of the liquid storage amount when determining an abnormality of the pumping apparatus for each of the pumping apparatuses having different heights of the inflow port.
Method of determining abnormality of pumping apparatus for intermittently pumping the liquid of the tank by repeating the storage mode for temporarily storing the liquid from the tank for storing the liquid and the pumping mode for pumping the stored liquid with the working gas And
Detecting the stored amount of liquid in the tank;
Detecting intermittent operation of the storage mode and the pumping mode of the pumping device;
Determining the abnormality of the pumping device;
In the step of determining the abnormality, a method of determining abnormality of the pressure-feeding device, which determines that the pressure-feeding device is abnormal, when the storage amount of liquid exceeds a predetermined threshold and the intermittent operation is not detected.