JP2023013090A - Controller and pump facility - Google Patents

Abstract

To detect erroneous detection of a full water detector and/or a waterdrop detector.SOLUTION: A pump that is installed at a position above a suction water level, is provided with a full water detector, and is provided with a waterdrop detector at a height below the full water detector, comprises: comparison means of comparing detection results of the presence or absence of water of the full water detector and the waterdrop detector during stop of the pump; and alarm means of outputting an alarm to give a notification on an abnormality of the detector when different states continue for a set period or longer.SELECTED DRAWING: Figure 2

Description

The present invention relates to control devices and pumping equipment.

In a suction pump station where the pump is installed above the suction water level, failure or erroneous detection of the full water detector or low water detector may cause the pump to run dry, leading to bearing burnout. If the pump breaks down, it will take several months to recover, so it is important to prevent it from happening.

A suction type pump station needs to fill the inside of the pump with water before starting the pump. The full water detector is used to confirm that the inside of the pump is filled with water and that the pump is ready for operation. There is

On the other hand, a water drop detector is installed to detect that the water inside the pump has fallen while the pump is rotating, and to stop the pump in an emergency. Failure of the falling water detector or erroneous detection may prevent detection of falling water, and the pump may continue to run dry. False positives occur not only when the detector itself malfunctions, but also when dirt such as mud or foreign objects such as straw occur.

JP 2017-96201 A JP 2017-96202 A

In the prior art, the converter of the falling water detector has a self-diagnostic function, and failure of the falling water detector itself can be detected. However, the self-diagnostic function of the converter can only detect failures of the falling water detector itself, and there is a problem that it cannot detect erroneous detection (malfunction) due to dirt or foreign matter. There is also known a method of detecting a water drop in a pump. However, failure or malfunction of the water detector (specifically, the full water detector and/or the water fall detector) itself is not taken into consideration, and there is the problem of lack of reliability when considering long-term use. remain.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a control device and pump equipment capable of detecting erroneous detection of a full water detector and/or a water falling detector.

A control device according to a first aspect of the present invention has a pump installation position higher than a suction water level, a full water detector is provided, and a water drop detector is provided at a height lower than the full water detector. In the pump, comparing means for comparing the detection results of the presence or absence of water of the full water detector and the water falling detector while the pump is stopped; and an alarm means for outputting an alarm.

According to this configuration, by comparing the water detection results of the full water detector and the water fall detector, it is possible to detect not only failures of the full water detector itself and the water fall detector itself, but also erroneous detection due to dirt and foreign matter ( malfunction) can also be detected.

A control device according to a second aspect of the present invention is the control device according to the first aspect, wherein the notification means detects the presence of water in the full water detector and the absence of water in the water fall detector. If this state continues for the set period or longer, an alarm may be output to notify the abnormality of the full water detector.

A control device according to a third aspect of the present invention is the control device according to the first or second aspect, wherein the notification means detects that the full water detector detects no water and When the presence detection state continues for the set period or longer, an alarm may be output to notify the abnormality of the falling-in-water detector.

A control device according to a fourth aspect of the present invention is the control device according to any one of the first to third aspects, wherein the alarm means, even if the different state continues for a set period or more, , it is not necessary to output an alarm for notifying an abnormality of the detector while the pump is rotating.

A control device according to a fifth aspect of the present invention is the control device according to any one of the first to fourth aspects, wherein the set period is set so that the water fall detector detects no water from the time the vacuum breaker valve is opened. may be the time up to the start of detection.

A control device according to a sixth aspect of the present invention is the control device according to any one of the first to fifth aspects, comprising a full-water standby switch for accepting the presence or absence of a full-water standby state,
When the full-water standby switch is in the full-water standby state while the pump is stopped, the alarming means outputs an alarm to notify of an abnormality in the detector even if the different state continues for a set period or longer. You don't have to.

A control device according to a seventh aspect of the present invention is the control device according to any one of the first to sixth aspects, wherein the alarming means comprises a When the full water detector detects no water and the water fall detector detects the presence of water, an alarm is output to notify the abnormality of the full water detector, and the full water detector detects the presence of water and the water fall detector detects the absence of water, an alarm may be output to notify that the water fall detector is abnormal.

A control device according to an eighth aspect of the present invention is the control device according to any one of the first to seventh aspects, wherein the alarming means comprises a When both the full-water detector and the falling-water detector detect that water is present, an alarm may or may not be output to notify that the detector is abnormal.

A control device according to a ninth aspect of the present invention is the control device according to any one of the first to eighth aspects, wherein the notification means is such that when the pump is stopped and the vacuum pump is in operation, for notifying an abnormality of the full water detector when both the full water detector and the water falling detector detect the presence of water during a period from immediately after detecting the presence of water to before the second set period elapses. An alarm may be output, and the second set period may be a time period from immediately after the water fall detector detects presence of water during operation of the vacuum pump until the water fall detector detects the presence of water.

A control device according to a tenth aspect of the present invention is the control device according to the ninth aspect, wherein the notification means detects that the falling water detector has detected water while the vacuum pump is operating while the pump is stopped. If the full water detector detects no water and the falling water detector detects water during the period from immediately after to before the second set period elapses, an alarm is output to notify the abnormality of the detector. You don't have to.

A control device pertaining to an eleventh aspect of the present invention is the control device pertaining to any one of the first to tenth aspects, wherein the alarming means, after stopping the pump and after opening the vacuum breaker valve, outputting an alarm to notify an abnormality of the full water detector when the full water detector detects the presence of water and the water fall detector detects the presence of water before the set period elapses; and/or when the full water detector detects no water and the water fall detector detects no water, an alarm is output to notify an abnormality of the water fall detector; It may be the time from after the vacuum breaker valve is opened after the stop to when the water drop detector detects no water.

A control device pertaining to a twelfth aspect of the present invention is the control device pertaining to the eleventh aspect, wherein the alarming means is provided after the pump is stopped and before a third set period elapses after the vacuum breaker valve is opened. During this period, when the full water detector detects no water and the water fall detector detects the presence of water, it is not necessary to output an alarm for notifying the abnormality of the detector.

A control device according to a thirteenth aspect of the present invention is the control device according to any one of the first to twelfth aspects, wherein the control device is connected to a control device of another pump facility so as to be able to exchange information, and the self pump When the state of the pump and the state of the water in the pump are the same between the equipment and the other pump equipment, if the detection results of the detector of the own pump equipment and the detector of the other pump equipment are different, the detector An alarm may be output to notify the abnormality.

A control device according to a fourteenth aspect of the present invention is the control device according to the thirteenth aspect, wherein the state of the pump is the same between the own pump facility and the other pump facility and the state of the water in the pump is the same. In the same state, when the detection result of the detector of the own pump equipment and the detector of the other pump equipment are the same, it is not necessary to output an alarm.

A pump facility according to a fifteenth aspect of the present invention is a control device comprising a pump, a full water detector provided in the pump, and a full water detector provided in the pump at a height lower than the full water detector A falling water detector and a control device as described in any of the first to fourteenth aspects may be provided.

According to one aspect of the present invention, by comparing the detection results of the presence or absence of water of the full water detector and the water falling detector, it is possible to detect not only the failure of the full water detector itself, the failure of the water falling detector itself, but also dirt and foreign matter. False positives (malfunctions) can also be detected.

It is a schematic block diagram of the pump equipment which concerns on this embodiment. It is a figure for demonstrating a pump installation position to a suction water level. 4 is a flowchart showing an example of processing of a control device; It is a schematic cross-sectional view in the case of a slight water drop during operation. It is a schematic cross-sectional view when it falls into the water during operation. FIG. 4 is a diagram for explaining a change in water level when a vacuum breaker valve is opened after the pump has stopped operating (while the pump is stopped); FIG. 10 is a schematic cross-sectional view when the pump is in a state of full water standby while the pump is stopped; FIG. 3 is a schematic cross-sectional view of a state in which water is present in the pump before opening the vacuum breaker valve; FIG. 4 is a schematic cross-sectional view of a state where the water level is between the falling water detector and the full water detector;

Hereinafter, each embodiment will be described with reference to the drawings. However, more detailed description than necessary may be omitted. For example, detailed descriptions of well-known matters and redundant descriptions of substantially the same configurations may be omitted. This is to avoid unnecessary verbosity in the following description and to facilitate understanding by those skilled in the art.

FIG. 1 is a schematic configuration diagram of pump equipment according to the present embodiment. As shown in FIG. 1, the pump equipment S includes, for example, a prime mover 1, a reduction gear 2 connected to the prime mover 1, a pump 3 having a main shaft connected to the reduction gear 2, and a full water detector provided to the pump 3. 4 and a falling water detector 5 provided at a height lower than the full water detector 4 in the pump 3. Furthermore, the pump equipment S includes, for example, an electric discharge valve 6 provided on the pump 3, a vacuum pipe 10 communicating with the pump 3, a vacuum breaking valve 7 provided on the vacuum pipe 10, and a and a vacuum pump 9 provided in a vacuum pipe 10 . Further, the pump facility S includes, for example, a control device 20 , and the control device 20 includes a comparison means 21 , an alarm means 22 , a timer 23 for counting time, and a full-water standby switch 24 . The full-water standby switch 24 receives, for example, the presence or absence of a full-water standby state from the manager of the pump facility.

<Processing 1>
Next, the processing contents of the control device 20 will be described. FIG. 2 is a diagram for explaining the suction water level as the pump installation position. As shown in FIG. 2, the pump installation position H1 is installed at a position higher than the suction water level H0. There is no water in the pump while the pump is stopped. If the full water detector is normal, it is detected that there is no water, and if the water fall detector is normal, it is detected that there is no water. Utilizing this, the comparing means 21 compares the detection result of the presence or absence of water of the full water detector and the water falling detector while the pump is stopped. The alarm means 22 outputs an alarm for notifying an abnormality of the detector when the different state continues for a set period or longer. This alarm may be a signal for lighting or blinking a lamp (such as an LED), a video signal for displaying a video warning of an abnormality, or an audio signal for warning an abnormality. or a combination of two or more of these.

Next, an example of criteria for determining the normal state and the abnormal state will be described.
<Normal state>
When the full water detector 4 detects no water and the water falling detector 5 detects no water when the pump is stopped and there is no water in the pump, the detectors (that is, the full water detector 4 and the water falling detector 5) is normal. In this case, the alarm unit 22 does not output an alarm because the detectors (that is, the full water detector 4 and the falling water detector 5) are normal.

<Abnormal state 1>
When the pump is stopped and there is no water in the pump, if the full water detector 4 detects water and the water fall detector 5 detects no water for a set period or longer, the full water detector 4 is abnormal. In this case, the alarm means 22 outputs an alarm for notifying that the full water detector 4 is abnormal. In this way, the notification means 22 notifies the abnormality of the full water detector when the state in which the full water detector detects the presence of water and the water fall detector detects the absence of water continues for the set period or longer. output an alert for

<Abnormal state 2>
When the pump is stopped and there is no water in the pump, if the full water detector 4 detects no water and the water fall detector 5 detects water for a set period or longer, the water fall detector 5 is abnormal. is. In this case, the alarm unit 22 outputs an alarm for notifying that the falling water detector 5 is abnormal. In this way, the notification means 22 notifies the abnormality of the water fall detector when the state in which the full water detector detects the absence of water and the water fall detector detects the presence of water continues for the set period or longer. output an alarm to

Next, an example of the above process will be explained using a flowchart. FIG. 3 is a flowchart showing an example of processing of the control device.
(Step S10) First, the comparison means 21 determines whether the full water detector 4 has detected water.

(Step S20) In parallel, the comparison means 21 determines whether the falling water detector 5 has detected water.

(Step S30) The comparison means 21 counts up the timer while the full water detector 4 is not detecting water and the water falling detector 5 is detecting water.

(Step S40) The comparison means 21 counts up the timer while the full water detector 4 is detecting water and the falling water detector 5 is not detecting water.

(Step S50) The alarm unit 22 determines whether or not the timer is equal to or longer than the set period.

(Step S60) If the timer is equal to or longer than the set period in step S50, the alarm unit 22 outputs an alarm for notifying the abnormality of the detector.

As described above, in the control device 20 according to the present embodiment, the pump installation position is installed at a position higher than the suction water level, the full water detector 4 is provided, and the water fall detector 5 is provided at a height lower than the full water detector 4. In the provided pump, when the comparison means 21 compares the detection result of the presence or absence of water of the full water detector 4 and the water fall detector 5 while the pump is stopped, and the different state continues for a set period or more, the detector is abnormal. and an alarming means 22 for outputting an alarm for notifying. According to this configuration, by comparing the water detection results of the full water detector 4 and the water fall detector 5, not only the failure of the water full detector 4 itself and the water fall detector 5 itself but also dirt and foreign matter can be detected. It is also possible to detect false positives (malfunctions) caused by

<Process 2>
FIG. 4 is a schematic cross-sectional view in the case of a slight water drop during operation. FIG. 4 shows the water level H2 when the water drops slightly while the pump is rotating. Normally, while the pump is rotating, the inside of the pump 3 and the inside of the full water detector 4 are filled with water. , no detection status) are different, so the abnormality detection is not performed while the pump is rotating.
(1) There is a possibility that the inside of the full water detector 4 will be in a state of no water due to a slight water drop during operation. This condition is normal as long as the pump continues to drain.

FIG. 5 is a schematic cross-sectional view in the case of falling into the water during operation. As shown in FIG. 5, the post-falling water level H3 is shown. If the water falls while the pump is rotating, there is no water in the pump. However, even if the water in the pump drops, water may remain only in the full water detector.
(2) When the full water detector 4 detects the presence of water and the water drop detector 5 detects the absence of water while the pump is rotating, it is a normal operation because the water has really dropped and the water drop has been detected.

Therefore, even if the different state continues for a set period or longer, the alarming means 22 does not output an alarm for notifying the abnormality of the detector while the pump is rotating.

<Processing 3>
Even when the pump is stopped, in the case of (1) below, the detection results of the full water detector and the low water detector (i.e. water present, no water) are different. be a condition for anomaly detection.

(1) FIG. 6 is a diagram for explaining the water level change when the vacuum breaker valve is opened after the pump operation is finished (while the pump is stopped). After the pump has finished operating (while the pump is stopped), the vacuum breaker valve 7 is opened to allow the water in the pump 3 to drop. Water level H6→Example of falling water level H5→Water level H4 at which the falling water detector 5 also starts detecting a waterless state. Therefore, the detection states of the full water detector 4 and the low water detector 5 (detection states of presence of water and absence of water) may differ during the set period, but this is not abnormal.

Therefore, the timer 23 excludes the time during which the water level fluctuates from the water level H6 to the water level H4. When the vacuum breaker valve 7 is opened and the water in the pump 3 is dropped, the time from when the full water detector 4 starts detecting no water to when the water falling detector 5 starts detecting no water is subject. It is assumed that the measurement is performed in advance by the pump 3. That is, the set period is, for example, the time from when the vacuum breaker valve 7 is opened to when the falling water detector 5 starts detecting no water.

<Processing 4>
FIG. 7 is a schematic cross-sectional view when the pump is stopped and waiting for full water. FIG. 7 shows the water level H8 when the water level is full and the water level H7 which has dropped slightly during the full water level standby. In FIG. 7, while the pump is stopped, the pump is on standby for the next operation while the water is full. In this case, the water gradually falls, and "the state in which the full water detector 4 detects the absence of water and the water fall detector 5 detects the presence of water" continues for a long time. Since the detector is not abnormal in this case, for example, when the full-water standby switch 24 is in the full-water standby state, abnormality detection is not performed.

That is, when the full-water standby switch 24 is in the full-water standby state while the pump is stopped, the alarm means 22 issues an alarm for notifying the abnormality of the detector even if the different state continues for a set period or longer. does not output

<Processing 5>
Further, the abnormality detection of the detector may be performed in a state where water is present in the pump before the vacuum breaker valve is opened. FIG. 8 is a schematic cross-sectional view of a state in which water is present in the pump before the vacuum breaker valve is opened. FIG. 8 shows the water level H9 after stopping the pump and before opening the vacuum breaker valve.

(1) Normal state After the pump is stopped and before the vacuum breaker valve is opened and there is water in the pump, when the full water detector 4 detects the presence of water and the water fall detector 5 detects the presence of water, the detector (that is, the full water detector 4 and the water falling detector 5) are normal. In this case, the alarm unit 22 does not output an alarm because the detectors (that is, the full water detector 4 and the falling water detector 5) are normal.

(2) Abnormal state 1
After the pump is stopped and before the vacuum breaker valve is opened and there is water in the pump, if the full water detector 4 detects no water and the falling water detector 5 detects water, the full water detector 4 is abnormal. be. In this case, the alarm means 22 outputs an alarm for notifying that the full water detector 4 is abnormal.

(3) Abnormal condition 2
After the pump is stopped and before the vacuum breaker valve is opened and there is water in the pump, if the full water detector 4 detects water and the water fall detector 5 detects no water, the water fall detector 5 is abnormal. be. In this case, the alarm unit 22 outputs an alarm for notifying that the falling water detector 5 is abnormal.

In this way, the notification means 22 detects the presence of water by the full water detector 4 and the water drop detector 5 when water is present in the pump after the pump is stopped and before the vacuum breaking valve is opened. When detected, an alarm is output to notify the abnormality of the full water detector 4, or when the full water detector 4 detects water and the water fall detector 5 detects no water, the water fall detector 5 Outputs an alarm to notify an abnormality of On the other hand, the notification means 22 detects that both the full water detector and the water falling detector detect the presence of water in a state where water exists in the pump before the vacuum breaker valve is opened after the pump is stopped. does not output an alarm to notify an abnormality of

<Processing 6>
Processing 6 will now be described with reference to FIG. A process 6 is an abnormality detection process during the full-water operation by operating the vacuum pump. It is assumed that the water levels rise in order of water levels H10, H11, and H12 in FIG. In this case, the detector abnormality detection may be performed in a state where the water level is between the full-water detector and the water-fall detector immediately after the water detector detects the presence of water during the operation of the vacuum pump. FIG. 9 is a schematic cross-sectional view showing a state in which the water level is between the falling water detector and the full water detector. FIG. 9 shows the upper limit water level at which the falling water detector 5 can detect water, the water level H11 below the full water detector 4 during full water work, and the upper limit water level H12 at which the full water detector cannot detect water. .

(1) Normal state Immediately after the water drop detector detects the presence of water during the operation of the vacuum pump, and the water level is between the full water detector 4 and the water drop detector 5 (that is, between the water level H10 and the water level H12 in FIG. 9). If the full water detector 4 detects no water and the water falling detector 5 detects water, the detectors (i.e. full water detector 4 and water falling detector 5) are normal. . In this case, the alarm unit 22 does not output an alarm because the detectors (that is, the full water detector 4 and the falling water detector 5) are normal.

(2) Abnormal state On the other hand, immediately after the water fall detector detects the presence of water during the operation of the vacuum pump, and the water level is between the full water detector 4 and the water fall detector 5 (that is, the water level H10 in FIG. 9). In the state where the water level is between the water level H12), if the full water detector 4 detects the presence of water and the water fall detector 5 detects the presence of water, the full water detector 4 should not originally detect water. Detector 4 is abnormal. In this case, the alarm means 22 outputs an alarm for notifying that the full water detector 4 is abnormal.

Here, the time from immediately after the falling water detector 5 detects the presence of water to when the full water detector 4 detects the presence of water during operation of the vacuum pump is measured in advance as a second set period. Then, the water level is between the full water detector 4 and the water detector 5 from immediately after the water fall detector detects water during vacuum pump operation to before the second set period elapses (that is, in the figure 9, the water level is between the water level H10 and the water level H12).

Utilizing this fact, the notification means 22 detects full water during the period from immediately after the falling water detector 5 detects the presence of water while the vacuum pump is in operation to before the second set period elapses while the pump is stopped. When both the water detector 4 and the water fall detector 5 detect the presence of water, an alarm may be output to notify that the water full detector 4 is abnormal. On the other hand, when the pump is stopped, the notification means 22 detects that the full water detector 4 detects no water during the period from immediately after the water fall detector 5 detects the presence of water during the operation of the vacuum pump to before the second set period elapses. is detected and the falling water detector 5 detects that there is water, the alarm for notifying the abnormality of the detector may not be output.

<Process 7>
Next, processing 7 will be described with reference to FIG. 9 as well. Process 7 is an abnormality detection process during falling into the water. Since the abnormality is detected while falling into the water, the water level H11 in FIG. Contrary to process 6, it is assumed that the water level descends in the order of water levels H12, H11, and H10 in FIG. In this case, after stopping the pump and opening the vacuum breaker valve, the abnormality detection of the detector may be performed in a state where the water level is between the full water detector 4 and the water falling detector 5 .

(1) Normal state After the pump is stopped and the vacuum breaker valve is opened, the water level is between the full water detector 4 and the low water detector 5 (that is, the water level is between the water level H10 and the water level H12 in FIG. 9). , if the full water detector 4 detects no water and the water fall detector 5 detects water, the detectors (that is, full water detector 4 and water fall detector 5) are normal. In this case, the alarm unit 22 does not output an alarm because the detectors (that is, the full water detector 4 and the falling water detector 5) are normal.

(2) Abnormal state 1
On the other hand, after the pump is stopped and the vacuum breaker valve is opened, the full water detector 4 detects the presence of water and the water fall detector 5 detects the presence of water in a state where the water level is between the full water detector 4 and the water falling detector 5. If it is detected, the full water detector 4 should not normally detect water, so the full water detector 4 is abnormal. In this case, the alarm means 22 outputs an alarm for notifying that the water full detector 4 is abnormal, for example.

(3) Abnormal condition 2
After the pump is stopped and the vacuum breaker valve is opened, the full water detector 4 detects no water and the water falling detector 5 detects no water when the water level is between the full water detector 4 and the water falling detector 5. If detected, the falling water detector 5 is supposed to detect water, so the falling water detector 5 is abnormal. In this case, the alarm means 22 outputs an alarm for notifying that the falling water detector 5 is abnormal, for example.

Here, the period from after the pump is stopped and after the vacuum breaker valve is opened to when the detection result of the falling water detector 5 switches from the presence of water to the absence of water is measured in advance as a third set period. Then, after the pump is stopped, the water level is between the full water detector 4 and the low water detector 5 (that is, the water level H10 ~ The water level is between the water level H12).

Utilizing this fact, the notification means 22 detects that the full water level detector 4 is full of water and that the water is falling during the period from after the pump is stopped and after the vacuum breaker valve is opened until the third set period has passed. When the device 5 detects water, an alarm is output to notify the abnormality of the full water detector 4 and/or the full water detector 4 detects no water and the water fall detector 5 detects no water. In this case, an alarm may be output to notify that the falling-in-water detector 5 is abnormal. On the other hand, the notification means 22 detects that the full water detector 4 detects no water and the water falling detector 5 detects that there is no water in the period from after the pump is stopped and after the vacuum breaker valve is opened to before the third set period elapses. is detected, the alarm for notifying the abnormality of the detector may not be output.

<Process 8>
In the above description, the detection results of the full water detector and the low water detector are compared in the same pump facility, but the detection results may be compared with detectors of other pump facilities (hereinafter also referred to as other pump facilities). At that time, the same type of detectors may be compared, or different types of detectors may be compared. When different types of detectors are compared, for example, a full water detector and a water fall detector of another machine may be compared, or a water fall detector and a water full detector of another machine may be compared. For example, when the state of the pump is the same and the state of water in the pump is the same between the self-pump facility and the other pump facility (for example, when the pump is stopped and there is no water in the pump), the self-pump facility and the other pump facility The detection results of the detectors will be collated with the pump equipment of the

As a result, in addition to checking the detection results of the detectors of the same pump facility (hereinafter referred to as the same machine), the detection results of the detectors of other machines are also checked to prevent errors in control. Reliability is further improved. Here, an example of the process will be described by assuming that the first pump facility having the pump facility of the present embodiment is No. 1, and the second pump facility having the pump facility of the present embodiment is No. 2. A description will be given assuming that the control device of the first machine and the control device of the second machine are connected so as to be able to exchange information.

(1) Normal state When Unit 1 is stopped (the pump is stopped and there is no water in the pump) and Unit 2 is stopped (the pump is stopped and there is no water in the pump), the full water detector 4 of Unit 1 detects no water and No. 2 full water detector detects no water, it is normal. Also, if the falling water detector 5 of the first machine detects no water and the falling water detector 5 of the second machine detects no water, the situation is normal. In these cases, the alarm unit 22 does not output an alarm because the detectors (that is, the full water detector 4 and the falling water detector 5) are normal.

(2) Abnormal state When Unit 1 is stopped (the pump is stopped and there is no water in the pump) and Unit 2 is stopped (the pump is stopped and there is no water in the pump), the full water detector 4 of Unit 1 If the detection result of No. 2 and the detection result of the full water detector of the second machine are different, the detection results should be the same, so one of the full water detectors 4 is abnormal. In this case, the alarm means 22 may output an alarm for notifying that one of the full-water detectors 4 is abnormal.

In addition, when Unit 1 is stopped (the pump is stopped and there is no water in the pump) and Unit 2 is stopped (the pump is stopped and there is no water in the pump), the detection result of the falling water detector 5 of Unit 1 and the If the detection results of the falling water detector 5 of the second device are different, the detection results should be the same, so one of the falling water detectors 5 is abnormal. In this case, the alarm means 22 may output an alarm for notifying that one of the overwater detectors 5 is abnormal.

That is, when the state of the pump and the state of the water in the pump are the same between the own pump equipment and the other pump equipment (for example, when the pump is stopped and there is no water in the pump) If the detection results of the detector of the own pump equipment and the detector of the other pump equipment are different, an alarm may be output to notify the abnormality of the detector. On the other hand, the alarming means 22 is issued when the state of the pump is the same and the state of the water in the pump is the same between the self-pumping equipment and the other pumping equipment (for example, when the pump is stopped and there is no water in the pump) , when the detection result of the detector of the own pump equipment and the detector of the other pump equipment are the same, it is not necessary to output an alarm.

As described above, the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the present invention at the implementation stage. Further, various inventions can be formed by appropriate combinations of the plurality of constituent elements disclosed in the above embodiments. For example, some components may be omitted from all components shown in the embodiments. Furthermore, components across different embodiments may be combined as appropriate.

1 prime mover 10 vacuum pipe 2 reduction gear 20 control device 21 comparison means 22 alarm means 23 timer 24 full water standby switch 3 pump 4 full water detector 5 falling water detector 6 electric discharge valve 7 vacuum breaking valve 8 intake valve 9 vacuum pump S pump equipment

Claims (15)

In a pump that is installed at a position higher than the suction water level, is provided with a full water detector, and has a water fall detector at a height lower than the full water detector, the full water detector and the full water detector while the pump is stopped comparison means for comparing detection results of the presence or absence of water of the falling water detector;
an alarm means for outputting an alarm to notify an abnormality of the detector when different states continue for a set period or longer;
A control device comprising: When the state in which the water full detector detects the presence of water and the water fall detector detects the absence of water continues for the set period or longer, the notification means issues an alarm to notify the abnormality of the full water detector. The control device according to claim 1, which outputs. The notification means issues an alarm for notifying an abnormality of the water fall detector when a state in which the full water detector detects the absence of water and the water fall detector detects the presence of water continues for the set period or longer. The control device according to claim 1 or 2, which outputs the . 4. The alarm device according to any one of claims 1 to 3, wherein even if the different state continues for a set period or more, the alarm means does not output an alarm for notifying the abnormality of the detector while the pump is rotating. Control device as described. The control device according to any one of claims 1 to 4, wherein the set period is the time from when the vacuum breaker valve is opened to when the falling water detector starts detecting no water. Equipped with a full water standby switch that accepts the presence or absence of a full water standby state,
When the full-water standby switch is in the full-water standby state while the pump is stopped, the alarming means outputs an alarm to notify of an abnormality in the detector even if the different state continues for a set period or longer. The control device according to any one of claims 1 to 5. When the water level detector detects water shortage and the water fall detector detects water status in a state where water exists in the pump after the pump is stopped and before the vacuum breaking valve is opened, Outputting an alarm for notifying the abnormality of the full water detector, and notifying the abnormality of the water fall detector when the full water detector detects the presence of water and the water fall detector detects the absence of water. The control device according to any one of claims 1 to 6, which outputs an alarm. After the pump is stopped and before the vacuum breaking valve is opened, the notification means detects that both the full-water detector and the water-falling detector detect that water is present in the pump. The control device according to claim 7, which does not output an alarm for notifying the The notification means is configured such that, while the pump is stopped, the full water detector and the water fall detector are detected during a period from immediately after the water fall detector detects presence of water during operation of the vacuum pump until a second set period elapses. When both of them detect the presence of water, output an alarm to notify the abnormality of the full water detector,
9. The second set period according to any one of claims 1 to 8, wherein the second set period is a period of time from immediately after the water fall detector detects the presence of water to when the full water detector detects the presence of water during operation of the vacuum pump. Control device. The notification means detects the absence of water by the full water detector during a period from immediately after the water fall detector detects the presence of water while the vacuum pump is in operation to before the second set period elapses while the pump is stopped. 10. The control device according to claim 9, wherein, when the falling water detector detects presence of water, an alarm for notifying abnormality of the detector is not output. The reporting means detects the presence of water in the full water detector and the presence of water in the water falling detector during a period from the opening operation of the vacuum breaking valve after the pump is stopped and before the third set period elapses. When detected, an alarm is output to notify the abnormality of the full water detector, and/or when the full water detector detects no water and the water fall detector detects no water, the water fall detector output an alarm to notify the abnormality of
The control device according to any one of claims 1 to 10, wherein the third set period is the time from after the pump is stopped and after the vacuum breaker valve is opened until the water drop detector detects no water. The notification means detects the absence of water by the full water detector and detects the presence of water by the water fall detector during a period from after the pump is stopped and after the vacuum breaker valve is opened to before the third set period elapses. 12. The control device according to claim 11, wherein an alarm for notifying an abnormality of the detector is not output when the alarm is detected. It is connected to control devices of other pump equipment so that information can be exchanged.
When the state of the pump is the same between the self-pump facility and the other pump facility and the state of the water in the pump is the same, and the detection results of the detector of the self-pump facility and the detector of the other pump facility are different, 13. The control device according to any one of claims 1 to 12, wherein an alarm is output to notify an abnormality of the detector. If the state of the pump is the same between the self-pump facility and the other pump facility and the state of the water in the pump is the same, and the detection results of the detector of the self-pump facility and the other pump facility are the same, an alarm will be issued. 14. The control device according to claim 13, which does not output the . a pump;
a full water detector provided in the pump;
a falling water detector provided at a height lower than the full water detector in the pump;
a control device according to any one of claims 1 to 14;
pumping equipment.

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