JP2018040341A - Pump control device and pump control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pump control device and a pump control method capable of coping with sudden increase of an inflow amount of water to be conveyed.SOLUTION: A pump control device 20 is provided with a control portion constituted to control start of a pump 14 in detecting that a water level measured by a water level gauge 16 reaches a pump starting water level HWL and to control stop of the operating pump 14 in detecting that the water level reaches a pump stopping water level LWL, and a clocking portion constituted to measure a stop time from the stop control of the operating pump 14 due to reaching to the pump stopping water level LWL of the water level to a time when the water level reaches the pump starting water level HWL next. The control portion is constituted to compare the stop time just before, measured by the clocking portion when detecting that the water level reaches the pump starting water level HWL with a prescribed threshold value, and to simultaneously control the starts of the pumps 14, 15 on the basis of the result.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pump control device and a pump control method for a water supply pump device including a plurality of pumps.

  Patent Document 1 discloses a manhole pump device that is an example of a water pump device. This manhole pump device has a manhole for storing the sewage flowing in from the inflow pipe, two pumps for feeding the sewage stored in the manhole to the outflow pipe, and a water level meter for measuring the water level of the sewage stored in the manhole. And a pump control device for controlling the pump based on the water level measured by the water level gauge.

  When the pump control device detects that the water level measured by the water level gauge has reached the pump start water level set at a predetermined height, the pump control device controls the start of one of the two pumps and operates the pump. When it is detected that the water level has reached the pump stop water level set lower than the pump start water level, the operation of the pump is stopped. Furthermore, when the pump control device detects that the water level measured by the water level gauge has reached an abnormally high water level, it starts and controls the second pump that is stopped in addition to the first pump that is already operating. Water is supplied by two pumps.

  Patent Document 2 discloses a drainage pump facility that is an example of a water pump device. This drainage pump facility includes a plurality of drainage pumps, a water level meter that measures the level of rainwater or the like stored in the pump well, and a control device that controls the pump based on the water level measured by the water level meter. ing. The control device obtains the rate of change of the water level from the water level measured by the water level gauge, and starts and stops the operation of one pump according to the rate of change of the water level, and then starts and stops the operation of the adjacent pump. I do.

JP 2015-34513 A JP-A-60-135683

  By the way, when a local heavy rain occurs, the amount of inflow of water to be sent may increase rapidly.

  In the configuration disclosed in Patent Document 1, even if the second pump is started and controlled while waiting for the water level to reach an abnormally high water level during the operation of the first pump, the water cannot be delivered in time and the sewage is discharged from the manhole. There was a risk of overflow.

  In the configuration disclosed in Patent Document 2, there is a problem that the pump control device is expensive and complicated because it is necessary to include a calculation unit for performing a complicated process of calculating the water level change rate.

  This invention is made | formed in view of the said situation, Comprising: It aims at providing the pump control apparatus and pump control method which can respond to the rapid increase of the inflow of the water which should be sent.

  In order to achieve the above-described object, the characteristic configuration of the pump control device according to the present invention is a pump control device of a water supply pump device provided with a plurality of pumps, and the plurality of pump control devices according to the operation status of the pump. It is in the point provided with the control part which starts and controls simultaneously the pump of a stand.

  With the above configuration, when it is necessary to predict the inflow amount of water to be supplied from the operation status of the pump, for example, comparison of past time, and to supply water in an amount exceeding the discharge amount of one pump By controlling the start of multiple pumps at the same time, the time from the start of the first pump until the start of the second pump can be used for water supply. It can cope with a rapid increase in inflow.

  In addition, the term "simultaneous" means that the start timing of one of the pumps and the start timing of other pumps are around several seconds to several tens of seconds, for example, in addition to the case where the start control of a plurality of pumps is completely simultaneous. Including the case of This is to avoid equipment damage from a load due to a starting current several times the rated current that flows when the pump is started.

  In the present invention, a timing unit is further provided, and the control unit simultaneously controls the plurality of pumps based on a comparison result between the operation time and / or stop time measured by the timing unit and a predetermined threshold value. It is preferable that the start-up control is performed.

  The pump control device is provided with a time measuring unit, and by the time measuring unit, for example, the pump stop time is measured, and this is compared with a predetermined threshold value only, that is, the water level change rate per unit time is calculated. Without the complicated process, it is possible to cope with an increase in the inflow amount by starting and controlling a plurality of pumps from the beginning when the water level reaches the pump starting water level.

  In the present invention, the predetermined threshold is a previous stop time measured immediately before the stop time, and the control unit simultaneously activates the plurality of pumps when the stop time is shorter than the previous stop time. It is preferable to be configured to control.

  When the stop time is shorter than the immediately preceding stop time (for example, when the stop time is less than half of the immediately preceding stop time), there is a possibility that a large amount of water that exceeds the discharge amount of one pump flows. In such a case, the discharge amount can be increased by starting and controlling a plurality of pumps from the beginning when the water level reaches the pump starting water level.

  In the present invention, the predetermined threshold is an average stop time calculated from a predetermined number of the stop times, and the control unit turns on the plurality of pumps when the stop time is shorter than the average stop time. It is preferable that the activation control is performed at the same time.

  When the stop time is shorter than the average stop time (for example, the stop time is half or less of the average stop time), there is a possibility that a large amount of water that exceeds the discharge amount of one pump flows. In such a case, the discharge amount can be increased by starting and controlling a plurality of pumps from the beginning when the water level reaches the pump starting water level. It should be noted that the average stop time may be calculated from a predetermined number of stop times in the past, including or not including the immediately preceding stop time.

  In the present invention, the predetermined threshold is an immediately preceding operation time measured immediately before the stop time, and the control unit simultaneously activates the plurality of pumps when the stop time is shorter than the immediately preceding operation time. It is preferable to be configured to control.

  When the stop time is shorter than the previous operation time (for example, the stop time is less than half of the previous operation time), there is a possibility that a large amount of water that exceeds the discharge amount of one pump flows. In such a case, the discharge amount can be increased by starting and controlling a plurality of pumps from the beginning when the water level reaches the pump starting water level.

  In the present invention, the predetermined threshold is an average operation time calculated from a predetermined number of times of the operation time, and the control unit turns on the plurality of pumps when the stop time is shorter than the average operation time. It is preferable that the activation control is performed at the same time.

  When the stop time is shorter than the average operation time (for example, the stop time is half or less of the average operation time), there is a possibility that a large amount of water that exceeds the discharge amount of one pump flows. In such a case, the discharge amount can be increased by starting and controlling a plurality of pumps from the beginning when the water level reaches the pump starting water level.

  In the present invention, it is preferable that the control unit is configured to start and control a pump different from the pump that was previously controlled to start any one of the plurality of pumps. .

  If it is the above-mentioned composition, concentration of the load to a specific pump can be prevented and a failure risk can be reduced.

  In the present invention, the control unit is configured to start and control a pump having a short cumulative operation time among the plurality of pumps that are stopped when the start control of any one of the plurality of pumps is performed. It is preferable that

  If it is the above-mentioned composition, concentration of the load to a specific pump can be prevented and a failure risk can be reduced.

  In order to achieve the above-mentioned object, a characteristic configuration of the pump control method according to the present invention is a pump control method of a water supply pump device including a plurality of pumps, and the plurality of pump control methods according to the operation status of the pumps. A starting step for starting and controlling the pumps at the same time is provided.

  With the above configuration, when it is necessary to predict the inflow amount of water to be supplied from the operation status of the pump, for example, comparison of past time, and to supply water in an amount exceeding the discharge amount of one pump By controlling the start of multiple pumps at the same time, the time from the start of the first pump until the start of the second pump can be used for water supply. It can cope with a rapid increase in inflow.

  In the present invention, a timing step is further provided, and the start-up step simultaneously controls the plurality of pumps based on a comparison result between the operation time and / or stop time measured by the timing step and a predetermined threshold value. It is preferable to control the activation.

  For example, by measuring the pump stop time and comparing it with a predetermined threshold, the water level can be calculated only by a simple process, that is, without calculating a water level change rate per unit time. By starting and controlling a plurality of pumps from the beginning when the pump reaches the pump starting water level, it is possible to cope with an increase in the inflow amount.

  In the present invention, the predetermined threshold is a previous stop time measured immediately before the stop time, and the start step starts the plurality of pumps simultaneously when the stop time is shorter than the previous stop time. Control is preferred.

  When the stop time is shorter than the immediately preceding stop time (for example, when the stop time is less than half of the immediately preceding stop time), there is a possibility that a large amount of water that exceeds the discharge amount of one pump flows. In such a case, the discharge amount can be increased by starting and controlling a plurality of pumps from the beginning when the water level reaches the pump starting water level.

  In the present invention, the predetermined threshold value is an average stop time calculated from a predetermined number of the stop times, and the start-up step turns on the plurality of pumps when the stop time is shorter than the average stop time. It is preferable to control the activation at the same time.

  When the stop time is shorter than the average stop time (for example, the stop time is half or less of the average stop time), there is a possibility that a large amount of water that exceeds the discharge amount of one pump flows. In such a case, the discharge amount can be increased by starting and controlling a plurality of pumps from the beginning when the water level reaches the pump starting water level. It should be noted that the average stop time may be calculated from a predetermined number of stop times in the past, including or not including the immediately preceding stop time.

  In the present invention, the predetermined threshold value is an immediately preceding operation time measured immediately before the stop time, and the starting step starts the plurality of pumps simultaneously when the stop time is shorter than the immediately preceding operation time. Control is preferred.

  When the stop time is shorter than the previous operation time (for example, the stop time is less than half of the previous operation time), there is a possibility that a large amount of water that exceeds the discharge amount of one pump flows. In such a case, the discharge amount can be increased by starting and controlling a plurality of pumps from the beginning when the water level reaches the pump starting water level.

  In the present invention, the predetermined threshold value is an average operating time calculated from a predetermined number of times of the operating time, and the start-up step turns on the plurality of pumps when the stop time is shorter than the average operating time. It is preferable to control the activation at the same time.

  When the stop time is shorter than the average operation time (for example, the stop time is half or less of the average operation time), there is a possibility that a large amount of water that exceeds the discharge amount of one pump flows. In such a case, the discharge amount can be increased by starting and controlling a plurality of pumps from the beginning when the water level reaches the pump starting water level.

  In the present invention, it is preferable that the start-up step performs start-up control of a pump different from the pump that has been start-up controlled last time when the start-up control of any of the plurality of pumps is performed.

  If it is the above-mentioned composition, concentration of the load to a specific pump can be prevented and a failure risk can be reduced.

  In the present invention, it is preferable that the start-up step controls start-up of a pump having a short cumulative operation time among the plurality of pumps that are stopped when performing start-up control of any of the plurality of pumps. .

  If it is the above-mentioned composition, concentration of the load to a specific pump can be prevented and a failure risk can be reduced.

Schematic of manhole pump device Explanatory drawing of pump control device Flow chart for starting and stopping the pump Flow chart of stop time counting step Flow chart of operation time counting step Decision step flow diagram Explanatory diagram of water level over time and pump status

  An embodiment of a pump control device and a pump control method according to the present invention will be described with reference to the drawings.

  FIG. 1 shows a manhole pump device 10 as an example of a water pump device.

  In the manhole pump device 10, a manhole 12 as a water storage part for storing sewage flowing in from the inflow pipe 11, two pumps 14 and 15 for pumping the sewage stored in the manhole 12 to the outflow pipe 13, Water level gauges 16 and 17 are provided for measuring the water level of the stored sewage.

  The pump 14 is connected to the outflow pipe 13 through the first discharge pipe 18, and the pump 15 is connected to the outflow pipe 13 through the second discharge pipe 19.

  The first discharge pipe 18 and the second discharge pipe 19 are provided with check valves 18V and 19V, respectively, to prevent a reverse flow of sewage discharged from the pumps 14 and 15.

  The water level gauge 16 is composed of an injection pressure type or bubble type water level gauge, and is disposed at the bottom of the manhole 12. The water level meter 16 can continuously measure the water level of the sewage stored in the manhole 12.

  The water level meter 17 is a water level meter for backup of the water level meter 16, and is composed of a float type water level meter, and is disposed at the height of the abnormally high water level HHWL of the manhole 12. Even if the water level gauge 17 causes a failure in the water level gauge 16, the abnormal high water level HHWL of the manhole 12 can be measured.

  In the vicinity of the manhole 12 near the ground, a control device 20 that controls the start and stop of the pumps 14 and 15 is installed. The control device 20 is electrically connected to the pumps 14 and 15 through power supply lines, and is electrically connected to the water level gauges 16 and 17 through signal lines. The control device 20 is the pump control device of the present invention.

  As shown in FIG. 2, the control device 20 includes a control unit 21, a storage unit 22, and a timer unit 23.

  The controller 21 controls the start and stop of the pumps 14 and 15 by executing a predetermined program based on the water levels measured by the water level gauges 16 and 17. A predetermined program executed by the control unit 21 is stored in the storage unit 22 in advance, and the water level measured by the water level gauges 16 and 17 can be stored.

FIG. 3 shows a procedure of a pump control method executed by the control device 20.
When the control unit 21 detects that the water level measured by the water level gauge 16 has reached the pump activation water level HWL set at a predetermined height (Yes in detection step # 11), one of the pumps 14 and 15 is detected. For example, if the pump 15 was controlled to start up last time, the pump 14 is controlled to start this time (starting step # 12), and the pump 14 is operated to reach the pump stop water level LWL in which the water level is set lower than the pump starting water level HWL. When it is detected (Yes in detection step # 13), the pump 14 is controlled to stop (stop step # 14).

  When the control unit 21 detects that the water level has reached the pump activation water level HWL again (Yes in detection step # 11), the control unit 21 controls activation of the pump 15 that is different from the pump 14 that was activated last time (activation step # 12). When it is detected by operation of the pump 15 that the water level has reached the pump stop water level LWL (Yes in detection step # 13), the pump 15 is controlled to stop (stop step # 14).

  In the present embodiment, the control unit 21 is configured to perform start-up control of a pump different from the pump that has been previously controlled for start-up control of one of the pumps 14 and 15. As described above, by alternately operating the pumps 14 and 15, it is possible to prevent the load from being concentrated on a specific pump and to reduce the risk of failure. Further, the control unit 21 may be configured to start and control the pump having the longest elapsed time since the previous stop control when the start control of any one of the pumps 14 and 15 is performed.

  Furthermore, the control unit 21 may be configured to start and control a pump having a short cumulative operation time among the pumps 14 and 15 that are stopped when starting or controlling any one of the pumps 14 and 15. . As described above, by operating a pump having a short cumulative operation time among the pumps 14 and 15, it is possible to prevent concentration of a load on a specific pump and to reduce a failure risk.

  Further, when the control unit 21 detects that the water level has reached the abnormal high water level HHWL set higher than the pump activation water level HWL (Yes in detection step # 15), in addition to the pump 14 or 15 that is already in operation. The pump 15 or 14 that is stopped is also controlled to start (starting step # 16). When it is detected that the water level has reached the pump stop water level LWL (Yes in detection step # 17), the pumps 14 and 15 are controlled to stop (stop step # 14).

Further, the control unit 21 executes each step as shown in FIG. 4 in addition to the series of steps as shown in FIG. That is, when it is detected that the water level has reached the pump stop water level LWL (Yes in detection step # 21), the timer 23 starts counting the stop time T _OFF (stop time timing step # 22), and the water level is activated by the pump. When it is detected that the water level HWL has been reached (Yes in detection step # 23), the time measuring unit 23 finishes counting the stop time T _OFF (stop time counting step # 24). The stop time T _OFF timed by the time measuring unit 23 is stored in the storage unit 22. The storage unit 22 stores the stop time T _OFF measured this time and the previous stop time T _OFFLT measured immediately before the stop time T _OFF at least twice, preferably more times.

Moreover, the control part 21 performs each step as shown in FIG. 5 in addition to a series of steps as shown in FIG. That is, when it is detected that the water level has reached the pump activation water level HWL (Yes in detection step # 31), the timer 23 starts to measure the operation time (operation time measurement step # 32), and the water level is the pump stop water level LWL. Is detected (Yes in detection step # 33), the time measuring unit 23 is caused to finish measuring the operation time (operation time measurement step # 34). Even operating time T _ON time measurement unit 23 has timed stored in the storage unit 22. However, in this embodiment, counting and storage of operating time T _ON it is not essential.

As shown in FIG. 6, when the water level reaches the pump stop water level LWL, the control unit 21 compares the length of the stop time T _OFF with the immediately preceding stop time T _OFFLT as a predetermined threshold (comparison step). (Yes in # 41).

The fact that the stop time T _OFF is shorter than the immediately preceding stop time T _OFFLT means that the amount of sewage flowing into the manhole 12 is more often when the stop time T _OFF is measured than when the immediately preceding stop time T _OFFLT is measured. Means that. For example, when the stop time T _OFF is extremely shorter than the average stop time T _OFFLT , abnormal rainfall such as guerrilla heavy rain is considered.

  Therefore, even if the water level does not reach the abnormally high water level HHWL, the number of pumps that are controlled to start by the starting step # 12 shown in FIG. # 42). At this time, activation control of the pumps 14 and 15 is performed by the activation step # 12 shown in FIG.

  Normally, a time lag occurs because the second pump is started after waiting for an abnormally high water level. On the other hand, the control method as described above, when the water level rises in a short time like guerrilla heavy rain, by starting two pumps at the same time even if the abnormally high water level has not been reached, Since the time lag from starting the first pump as usual until starting the second pump can be used for drainage, it is excellent in that reliable drainage is possible.

Further, if the stop time T _OFF is not shorter than the immediately preceding stop time T _OFFLT (No in comparison step # 41), the number of pumps that are controlled to start by the start step # 12 shown in FIG. Decision step # 43). At this time, only one of the pumps 14 and 15 is controlled to start by starting step # 12 shown in FIG.

  The pump control method will be described with reference to FIG. FIG. 7 shows the time transition of the water level measured by the water level meter 16 and the states of the pumps 14 and 15 controlled by the control unit 21 in accordance therewith.

Here, the process after the pump 14 is controlled to start at the time t ₁ when the pump activation water level HWL is reached and the sewage stored in the manhole 12 is started to be supplied will be described.

In time t _2, the control unit 21, when the water level by the detection step detects that reaches the pump stop level LWL, and stops controlling the pump 14 by the stop step # 14. At that time, operation time _{T t2-t1} from time _{t 1} to time _{t 2} is measured by the operation time measuring step.

Then, at time t _3, when the water level by the detection step detects that reaches the pump start level HWL, stop time T _t3-t2 from time t ₂ to time t ₃ is counted by the stop time counting step.

  Then, the control part 21 carries out starting control of only the pump 15 here by starting step # 12. Thus, the sewage stored in the manhole 12 is sent.

Then, at time t _4, the control unit 21, when the water level by the detection step detects that reaches the pump stop level LWL, and stops controlling the pump 15 by the stop step # 14. At that time, operation time _{T t4-t3} from time _{t 3} to time _{t 4} is measured by the operation time measuring step.

Then, at time t _5, when the water level by the detection step detects that reaches the pump start level HWL, stop time T _t5-t4 from time t ₄ to time t ₅ are counted by the stop time counting step.

Then, the control unit 21 compares the stop time T _t5-t4 with the immediately preceding stop time T _t3-t2 that is a predetermined threshold value T _th by the comparison step. In this case, since the stop time T _t5-t4 is shorter than the immediately preceding stop time T _t3-t2, it is determined based on the comparison result that the two pumps are controlled to start. Accordingly, the pumps 14 and 15 are controlled to start by starting step # 12. Thus, the sewage stored in the manhole 12 is sent. Here, in the above-described embodiment, it has been described that the stop time is compared with the previous stop time that is the threshold value, but the present invention is not limited to this. A case where a predetermined correction time is added to the immediately preceding stop time or a time calculated by multiplying a predetermined coefficient is used as the immediately preceding stop time is widely included in the embodiment.

Then, at time _{t 6,} the control unit 21, when the water level by the detection step detects that reaches the pump stop level LWL, and stops controlling the pumps 14 and 15 by the stop step # 14. Note that this time, operation time _{T t6-t5} from time _{t 5} to time _{t 6} is counted by the operation time measuring step.

In the above-described configuration, in FIG. 4, the timing unit 23 has described the case where the time is counted as the stop time T _OFF from when the water level reaches the pump stop water level LWL to when the water level reaches the pump start water level HWL. timekeeping but timing unit 23, since the water level has actually stopped controlling the pump during operation by reaching the pump stop level LWL, as a stop time T _OFF until the time when the water level reaches the pump start level HWL May be.

In the configuration described above, in FIG. 5, timing unit 23, in the case of counting the operation time T _ON, from when the water level reaches the pump start level HWL, until the water level has reached the pump stops water level LWL has been described for measuring the time as the operating time T _oN, timer unit 23, since the water level started controlling the pump by reaching pump start level HWL, until the water level has reached the pump stops water level LWL the time or indeed pump during operation by the water level has reached the pump is stopped the water level LWL may be timed as operating time T _oN time to when the stop control.

Furthermore, in the above-described configuration, the case where the predetermined threshold T _th is the immediately preceding stop time T _OFFLT measured immediately before the stop time T _OFF has been described, but the present invention is not limited to this. The predetermined threshold value T _th is appropriately set according to the configuration of the water pump device to which the pump control device and the pump control method according to the present invention are applied. For example, the predetermined threshold value T _th is set immediately before the stop time T _OFF . It may be half the time of the last stop time T _{OFFLT counted} or may be a double time. That is, in the present invention, the threshold value is widely applied by adding / subtracting a predetermined correction time to / from the time to be compared, or multiplying by a predetermined correction coefficient, and the rainfall, weather, or pump performance. It can be appropriately adjusted according to various conditions such as.

Further, the predetermined threshold value T _th may be an average stop time T _OFFAV calculated by the control unit 21 from a predetermined number of stop times T _OFF from immediately before. For example, every time the control unit 21 detects that the water level has reached the pump activation water level HWL, the control unit 21 calculates the average stop time T _AV three times from immediately before, and executes the determination step based on this. In addition, the said 3 times is an illustration and the frequency | count can be suitably set according to the operating frequency etc. of the pumps 14 and 15.

Further, the control unit 21 may calculate the average stop time T _OFFAV from a predetermined number of stop times T _OFF that do not include the immediately preceding stop time T _{OFF, and} that is continuous or non-continuous in the past. The average stop time T _OFFAV may be calculated each time the detection of reaching the startup water level HWL is repeated several times.

Further, the predetermined threshold value T _th may be an operation time T _ON (immediately before operation time T _ONLT ) measured immediately before the stop time T _OFF , or an average calculated from a predetermined number of operation times T _ON. The operation time may be _ONAV . For example, the fact that the stop time is shorter than the previous operation time means that the previous operation time is longer than the stop time, and that the operation time is longer than the discharge amount of the pump. Since there is a large amount of inflow of sewage, there is a possibility that it has been operating for a long time. Even in such a case, since the two pumps are started at the same time, the time lag from starting the first pump as usual until starting the second pump can be used for drainage. It is excellent in that reliable drainage is possible.

In any case, when the water level reaches the pump activation water level HWL and the immediately preceding stop time T _OFF is shorter than the predetermined threshold T _th , the control unit 21 controls activation of the two pumps 14 and 15 simultaneously. That's fine.

In addition, when the total time of the last operation time T _ON and the stop time T _OFF is longer than the predetermined threshold value T _th , the control unit 21 controls the start of the pumps 14 and 15 when the pump start water level HWL is detected next. It may be configured to.

In this case, the predetermined threshold T _th is not limited to the immediately preceding stop time T _OFFLT or the average stop time T _OFFAV , but is the _sum of the immediately preceding operation time T _ONLT , the average operation time T _ONAV , the immediately preceding operation time and the stop time T. It may be time.

For example, the pump 14 starts controlling the starting step # 12 in FIG. 3, from the total time _N is a predetermined threshold value _{T th} operating time _{T ON} and stop time _{T OFF} until the stop control of the pump 14 in the stop step # 14 In such a case, it is assumed that a large amount of sewage flows into the manhole 12 due to local heavy rain. Therefore, when the water level next reaches the pump activation water level HWL, the decision step # 42 In FIG. 6, the number of pumps to be activated is determined as two, and the activation of pumps 14 and 15 is controlled by activation step # 12.

In addition, when the water level reaches the pump activation water level HWL, the control unit 21 determines that the immediately preceding operation time T _ON is greater than a predetermined threshold value T _th (stop time T _OFFLT , average stop time _OFFAV , or average operation time T _ONAV ). If it is too long, the two pumps 14 and 15 may be activated and controlled simultaneously. In this way, by simultaneously starting controls pumps 14 and 15 based on the operating time _{T ON} of the pumps 14 and 15, can be avoided a possibility that sewage overflows from the manhole 12.

Further, in any of the above-described embodiments, the stop time T _OFF and the operation time T _ON of the pumps 14 and 15 are compared with a predetermined threshold value T _th , and the pumps 14 and 15 are simultaneously controlled to start when a predetermined condition is satisfied. However, it is not limited to this. For example, when the pumps 14 and 15 are simultaneously started and controlled more frequently than expected, or when the pumps 14 and 15 are started and controlled less frequently than expected, the pumps 14 and 15 are controlled simultaneously. The number of pumps to be controlled for activation may be adjusted according to the frequency of operation.

The predetermined threshold value T _th may be an expected operation time calculated from the capacity of the manhole 12 and the discharge amounts of the pumps 14 and 15. Furthermore, for example, a predetermined threshold value T _th may be set in consideration of an expected inflow amount corresponding to a time zone, a day of the week, a season, and the like.

  In any of the above-described embodiments, the case where the two pumps 14 and 15 are provided in the manhole 12 has been described. However, the number of pumps may be two or more. The pump control device and the pump control method according to the present invention can be applied not only to the manhole pump device but also to other water pump devices.

  Furthermore, the pump control method is not limited to the above-described embodiments. For example, two pumps are generally installed in the manhole, and if there is a control method in which the second pump is started at an abnormally high water level, the water level is set to be higher than the first pump starting water level. There is also a control method in which the second pump is started when the second pump operating water level is reached. The present invention can be applied to any of the above control methods.

  In any case, the control device 20 can be realized simply by providing the timer unit 23 and changing or adding a program stored in the storage unit 22.

  As described above, the pump control device and the pump control method according to the present invention provide water supply without complicated processing by a simple configuration in which activation control is performed simultaneously on a plurality of pumps according to the operation state of the pump. It can cope with a sudden increase in the inflow of water to be used.

  Each of the above-described embodiments is an example of the present invention, and the technical scope of the present invention is not limited from the description. The specific configuration of the pump control device of the water pump device, the start control of the pump, Specific conditions and the like for stop control can be appropriately changed within a range in which the effects of the present invention are exhibited.

10: Manhole pump device (water pump device)
14: Pump 15: Pump 20: Control device (pump control device)
21: Control unit 22: Storage unit 23: Timing unit HWL: Pump start water level LWL: Pump stop water level # 12: Start step # 14: Stop step # 16: Start step # 22: Stop time count step # 24: Stop time count step # 32: operation time counting step # 34: operation time counting step _{T OFF:} stop time _{T OFFLT:} just before stopping time _{T OFFAV:} the average suspension time _{T ON:} operation time _{T ONLT:} immediately before operation time _{T ONAV:} mean operation time T _th : threshold

Claims (16)

A pump control device for a water pump device comprising a plurality of pumps,
The pump control apparatus provided with the control part which starts and controls the said several pump simultaneously according to the driving | running state of the said pump. In addition, a timekeeping part is provided,
2. The control unit is configured to simultaneously start and control the plurality of pumps based on a comparison result between an operation time and / or a stop time measured by the time measuring unit and a predetermined threshold value. The pump control apparatus described in 1. The predetermined threshold is a previous stop time measured immediately before the stop time,
The pump control device according to claim 2, wherein the control unit is configured to simultaneously start and control the plurality of pumps when the stop time is shorter than the immediately preceding stop time. The predetermined threshold is an average stop time calculated from a predetermined number of stop times,
The pump control device according to claim 2, wherein the control unit is configured to simultaneously start and control the plurality of pumps when the stop time is shorter than the average stop time. The predetermined threshold is an immediately preceding operation time measured immediately before the stop time,
The pump control device according to claim 2, wherein the control unit is configured to simultaneously start and control the plurality of pumps when the stop time is shorter than the immediately preceding operation time. The predetermined threshold is an average operation time calculated from a predetermined number of the operation times,
The pump control device according to claim 2, wherein the control unit is configured to simultaneously start and control the plurality of pumps when the stop time is shorter than the average operation time.   7. The control unit according to claim 1, wherein the control unit is configured to start and control a pump different from the pump that was previously controlled to start when controlling any one of the plurality of pumps. 8. The pump control device according to item.   The control unit is configured to start and control a pump having a short cumulative operation time among the plurality of pumps that are stopped when starting and controlling any one of the plurality of pumps. The pump control apparatus according to any one of 1 to 6. A pump control method for a water pump device comprising a plurality of pumps,
A pump control method comprising an activation step of simultaneously controlling the activation of the plurality of pumps according to the operation status of the pump. There is also a timekeeping step,
10. The pump control method according to claim 9, wherein the starting step simultaneously starts and controls the plurality of pumps based on a comparison result between the operation time and / or the stop time measured by the time measuring step and a predetermined threshold value. . The predetermined threshold is a previous stop time measured immediately before the stop time,
11. The pump control method according to claim 10, wherein in the starting step, when the stop time is shorter than the immediately preceding stop time, the plurality of pumps are controlled to start simultaneously. The predetermined threshold is an average stop time calculated from a predetermined number of stop times,
11. The pump control method according to claim 10, wherein in the starting step, when the stop time is shorter than the average stop time, the plurality of pumps are controlled to start simultaneously. The predetermined threshold is an immediately preceding operation time measured immediately before the stop time,
11. The pump control method according to claim 10, wherein in the starting step, the plurality of pumps are controlled to start simultaneously when the stop time is shorter than the immediately preceding operation time. The predetermined threshold is an average operation time calculated from a predetermined number of the operation times,
11. The pump control method according to claim 10, wherein the start-up step controls start-up of the plurality of pumps simultaneously when the stop time is shorter than the average operation time.   The pump control according to any one of claims 9 to 14, wherein the start-up step performs start-up control of a pump different from the pump that has been start-up controlled last time when start-up control of any of the plurality of pumps is performed. Method.   The start-up step controls the start-up control of a pump having a short cumulative operation time among the plurality of pumps that are stopped when the start-up control of any of the plurality of pumps is performed. The pump control method according to one item.

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