JP3278932B2 - Rainwater pump controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for controlling a rainwater pump group in response to a rainfall condition, and more particularly to an apparatus for controlling a rainwater pump at a variable speed in controlling rainwater removal equipment in a sewage treatment facility.

[0002]

2. Description of the Related Art A sewerage business aims to ensure the safety of urban functions by quickly removing rainwater in addition to treating wastewater. In particular, in recent years, the amount of rainwater runoff tends to increase due to a decrease in rainwater permeability due to the urbanization of urban areas, and the importance of removing rainwater is increasing more and more.

Generally, in a sewage treatment facility, rainwater flowing into a sewer is accumulated in a pump well, and the accumulated rainwater is drawn out by a rainwater pump group and supplied to a rainwater treatment plant. The operation control of the rainwater pump group is usually performed by controlling the number of pumps operated based on the water level of the pump well. In this control of the number of operating pumps, the water level of the pump well may fluctuate rapidly, so the amount of rainwater flowing down to the pump well must be predicted and considered. With conventional control, the pump well water level
In addition to the descent information, the operator decided the number of pumps to operate based on his / her intuition and experience, taking into account the amount of rainfall in the jurisdiction.

[0004]

In the operation control of the rainwater pump, the time lag from the start of the rainwater pump to the actual start of the operation of the rainwater pump is taken into consideration.
It is necessary to immediately determine the number of pumps to be operated according to changes in pump well water level and rainfall. Moreover, when determining the operating pump, it is necessary to select an optimal combination from a plurality of pumps having various discharge rates. From such a background, the operation control of the rainwater pump requires a high degree of operation technology (intuition and experience). On the other hand, rainwater pumping facilities are disadvantageous for the training of operators due to their low frequency of operation.In addition to the different rainwater flow characteristics at each sewage treatment plant, the rainwater Considering the change in the flow characteristics, not only is the burden on the operator heavy, but also limits the efficient operation of the rainwater pump facility. For example, not only the pump speed control based on the water level of the pump well, but also the optimum speed Control has not yet been realized.

[0005] Also, rainwater flows through the pipes after rainfall and flows into the pump well, but it is not possible to quantitatively judge when and how much will flow into the pump well. extremely difficult. Therefore, when the amount of inflow into the pump well decreases, the number of operating pumps tends to be increased.

[0006] Further, the pump operation which is usually performed is as follows.
Since a certain water level is controlled as the target value, the operating pump is operated at the minimum rotation speed when the inflow into the pump well decreases. Therefore, the integrated pump operation time tends to be long.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a rainwater pump group control which can flexibly cope with a rainfall situation, and an object of the present invention to provide a variable speed control of a rainwater pump.

[0008]

FIG. 1 shows the configuration of the present invention. In order to achieve the above object, the present invention provides a pump well 1 formed downstream of a sewer laid in a jurisdiction area.
01, a rainwater pump group 102 attached to the pump well 101, and an outflow sewage 103 that discharges water pumped by the rainwater pump group 102. It has the following elements.

1. Target discharge amount calculating means 10 for obtaining pump group target discharge amount 105 based on pump well water level 104
6.

[0010] 2. Necessity of pump activation 109 based on rainfall 107 in each part of the jurisdiction area and water level 108 in each part of the sewer
Means 110 for estimating the necessity of starting the pump.

3. Number-of-operations control means 111 for selecting a starting pump or a stopping pump based on the magnitude relationship between the pump group target discharge amount 105 and the minimum discharge amount of the active pump. The operating number control means 111 sets a low rotation speed as at least a priority condition for selecting a stopped pump. Further, the operating number control means 111 uses the fluctuation tendency of the pump start necessity 109 as a reference for selecting a start pump / stop pump in addition to the magnitude relationship between the pump group target discharge amount 105 and the minimum discharge amount of the currently operating pump.

4. A rotation speed control unit 112 for controlling the rotation speed of the operating pump based on the pump group target discharge amount 105;
This rotation speed control means 112 has the following elements.

(1) Rotation speed correction pump selecting means 113 for selecting a rotation speed correction pump from the operating pumps. When the change amount of the pump group target discharge amount 105 is positive, the rotation speed correction pump selecting unit 113 sets at least a priority condition of the pump selection that the integrated operation time is short, and the change amount of the pump group target discharge amount 105 In the case of a negative value, a long cumulative operation time is at least a priority condition for selecting a pump.

(2) Rotation speed correction means 114 for setting a correction rotation speed of the rotation speed correction pump based on a change amount of the pump group target discharge amount 105. This rotation speed correcting means 114 has the following elements.

A) Actual head calculating means 117 for obtaining an actual head 116 based on the pump well water level 104 and the outflow culvert water level 115.

B) A water supply line resistance curve is determined from the actual head 116, and the corrected rotation speed is calculated based on the current rotation speed and the change amount of the pump target discharge amount 105 using the water supply line resistance curve and the pump operation characteristic curve. Rotation speed calculating means 119 for obtaining 118;

[0017]

According to the present invention, the pump target discharge amount of the rainwater pump group is calculated based on the pump well water level, and the number of operating units and the number of revolutions are controlled based on the pump target discharge amount. In order to perform these controls properly, it is necessary to accurately understand the rainwater flow conditions and reflect them in the control.
For example, by introducing a parameter that indicates the necessity of starting the pump in the control of the number of operating units, it is possible to flexibly cope with a sudden change in the rainfall condition or the like by introducing a parameter of the necessity of starting the pump. The degree of necessity of starting the pump can be obtained by detecting the amount of rainfall in each part of the jurisdiction area and the water level in each part of the sewer, for example, by fuzzy inference from the detected values.

Further, when selecting a stop pump in the operation number control and selecting a rotation speed correction pump in the rotation speed control, the integrated operation time of each pump is reflected. In other words, while giving priority to the one with the lower rotation speed when selecting the stop pump, taking into account the length of the integrated operation time when selecting the rotation speed correction pump, the pump with the longer integrated operation time is controlled to have a lower rotational speed. Thus, the operating rate can be made uniform. In calculating the corrected rotation speed,
By calculating the actual head from the pump well water level to obtain the transmission line resistance characteristics, and further calculating the corrected rotation speed in consideration of the pump operation characteristics, the accuracy of the rotation speed control is improved.

[0019]

Embodiments of the present invention will be described below. In this embodiment, the manhole water level is appropriately detected, and the number of operating rainwater pumps is controlled by fuzzy inference in consideration of the manhole water level and the pump well water level.

FIG. 2 schematically shows the system configuration of the apparatus of this embodiment. 201 is a sewer through which rainwater flows down, 202 is a sand basin, 203 is a pump well connected to the sand basin, 204 is a rainwater pump attached to the pump well, 205 is a water level gauge for measuring the pump well water level, 206 is An outflow culvert that guides pumping and drainage to rivers, etc., 207 is a water level gauge for measuring the outflow culvert water level, and 208 is a water level gauge for measuring the manhole water level. This water level gauge 20
The manhole to which the pump 8 is attached has enough time to make predictions, taking into account the time required for the rainwater to reach the pump well 203 and the time required to start the rainwater pump 204 (the time from startup until the pump reaches the rated discharge rate). Select a place that can be secured at a location that is not affected by the water level of the pump well. Reference numeral 209 denotes a rain gauge for measuring the rainfall of each part in the jurisdiction, and 210 denotes a control device for controlling the number of operating rainwater pumps.

FIG. 3 shows an outline of a pump operation control flow incorporated in the control device 210. In this embodiment, a pump activation level indicating whether pump activation is necessary is periodically (period Δ
prediction and thereby set to t each _f) (S1,2), the control cycle _{Δt c (Δt f> Δt c} ) each to determine the pump target amount of change (S3), the pump operation number control based on these values ( S4 to 9) and the pump rotation speed control (S10) are performed. Various operations are performed using fuzzy inference as needed. In fuzzy inference, fuzzification of input items, fuzzy operation, and defuzzification of output items may be performed by a known method.

The pump starting level captures rainfall and manhole water level and is inferred from these values. An example of the fuzzy rule used in this inference is "IF
The rainfall is very high & the manhole water level is very high. The starting level of the THEN pump will be "Starting need is very high".

On the other hand, the pump target change amount is inferred from the pump well water level deviation (the deviation between the water level detection value and the water level target value) and the rate of change in the pump well water level. The change rate of the pump water level is represented by the following equation (1), where the change rate at time t is ΔH (t).

[0024]

ΔH (t) = (H (t) −H (t−t _n )) / t _n (1) An example of a fuzzy rule used in this inference is as follows.
"IF pump well water level deviation is not biased & pump well water level change rate does not change THEN pump target change = 0"
And so on.

Thereafter, start pump selection information, stop pump selection information, etc. are set (S6-9). In this case, first, (2) determining the pump required discharge amount Q _n (t) from the pump target amount of change Q _c (t) used. However, it is the pump discharge amount at time t (current time).

[0026]

Q _n (t) = Q (t) + Q _c (t) (2) Then, the required pump discharge amount Q _n (t) is compared with the current minimum pump discharge amount Q _min (t). The setting process of the pump start / stop instruction is appropriately selected based on the comparison result. Q _n (t) <In the case of _{Q min (t) (S5:} YE
S), a stopped pump is selected based on pump operation information and the like (S9).

If Q _n (t)> Q _min (t) (S4: YES or S5: NO), the first pump starts even though the water level exceeds the pump starting water level. It is checked whether the state is not performed, and if so, it is set that the first pump should be started (S6).

If Q _n (t)> Q _min (t) and the period Δt _f is satisfied (S4; YES), first, the future start level, the current start level, the required pump discharge amount, and the current pump maximum discharge amount Then, the starting pump flag is set based on the pump starting information (S7). Here, when the pump is activated to the time to reach the rated and t _p from, because it can cope with rainwater inflow amount after t _p time by operating the pump at the moment, t- (t _i -t _p) The pump activation level at time t is the current activation level, and the pump activation level at time t is the future activation level. The setting of the startup pump flag takes into account the case where the large pump or the small pump is stopped, or the case where the large or small pump is further started even if the pump is currently being started. With these things, flexible control according to the rainfall situation was made possible, and consideration was given to cope with sudden inflow of rainwater. To illustrate one of the rules, the rule for starting a large pump is, for example,

[0029]

(3) IF Y (t-ty) = 2 & Y (t) = 0 & Pw = 0 THEN Pf (t) = 2 On the other hand, the rule to activate a small pump is

[0030]

## EQU4 ## IF Y (t-ty) = 1 Y (t) <= 0 & Qn (t)> = Qmax (t) & Pw = 0 THEN Pf (t) = 1 Also, the rule to start the pump further when there is a running pump is:

[0031]

EQUATION 5 IF Y (t-ty) = 2 Y (t) = 2 & Qn (t)> = Qmax (t) & Pw = 1 THEN Pf (t) = 2 Where Y is the pump activation level (0:
No need to start, 1: Need to start, 2: Very high need to start), Y (t- _ty ) is current start level, Y
(T) is the future activation level (where t _y = t _i -t _P ), P _W
Is pump activation information (0: no pump activation, 1: pump activation), Q _max (t) is the current maximum pump discharge, Pf
(T) is a start pump flag (0: keep current, 1: start small pump, 2: start large pump). Thereafter, a starting pump is selected based on the set starting pump flag, the accumulated pump operating time, the pump operating information, and the like, and a starting instruction for the selected pump is set (S8).

Thereafter, taking into account the pump start / stop instructions set by the above method, the required pump discharge amount Q
Set the pump rotation speed corresponding to _n (t) (S10),
The operation amount of each pump is calculated and output (S11). By introducing fuzzy inference into the calculation of the pump activation level and the like in this way, the experience and intuition of a skilled driver can be incorporated into the control. This is advantageous in that it is data actually used by the operator during operation of the pump, such as the water level. Further, even when the ground surface process or the connection of the sewer is changed, it can be easily dealt with by modifying the parameters used in the fuzzy inference.

Next, details of the pump speed setting process will be described. FIG. 4 shows an outline of this processing. First, when the pump target change amount _Qc (t) is _Qc (t) = 0 (S1; YE)
S) Since the setting change of the pump speed is not necessary, this process is skipped. If Q _c (t) ≠ 0 (S1; N
O), actual head of the _{H t (t) (= H} o (t) -H (t), where H _o (t) is in helping to determine the outflow sewer water level) (S
2), the rotation speed increasing process from the positive or negative of Q _c (t) (S4 to
7) Alternatively, a rotation speed lowering process (S8 to 11) is selected (S3).

In the rotation speed increasing process, first, a pump for increasing the rotation speed is selected (S4). In this pump selection, a pump with the shortest integrated pump operation time is selected from operating pumps for which the rotation speed control flag (described later) is not set. Thereby, the pump operation time is equalized. That is, as described later, in the rotation speed lowering process, the one with the longest pump integration operation time is selected, and the control is performed such that the rotation speed decreases as the pump integration operation time increases. By selecting the pump with the lowest rotational speed as the stop pump in the above-described pump stop process (S9 in FIG. 3), the pump with a long integrated operation time can be stopped preferentially.

[0035] When the selection of the rotational speed increase pump is completed, it sets the pump speed in response to the pump target amount of change Q _c (t) and the actual head _{H t (t) (S5)} . In this process, the set number of revolutions is obtained by using a preset pump characteristic curve and a water supply line resistance curve. FIG. 5 shows an example of a pump characteristic curve. Here, the actual head at the pending time t is H
_t (t), the rotation speed at the suspension time t is n (t), the set rotation speed is n ′, the minimum rotation speed is n _min , and the maximum rotation speed is n _max
In FIG. 5, a curve A is a pump operation characteristic at a rotation speed n _min , a curve B is a pump operation characteristic at a rotation speed n (t), a curve C is a pump operation characteristic at a rotation speed n _max , and a curve D. pump discharge amount at the time rotational speed n _min is the water supply conduit resistance in the actual head H _{t (t),} Q _min is actual head H _{t (t),}
Q is the pump discharge amount when the rotational speed n (t) in the actual head H _{t (t),} Q _max is the rotational speed n in the actual head H _t (t)
_{This is} the pump discharge amount at the time of _max .

The pump operation characteristic curve B moves in parallel between the curves A and C according to the rotation speed n (t) (n _min ≦ n (t) ≦ n
_max ), the water line resistance curve D is translated by the Y intercept _Ht (t). Therefore, the rotation speed n (t) and the actual head H
Curves B and D are determined from _t (t), and the X coordinates Q _min and Q of the intersections e ₁ , e ₂ and e ₃ between the curve D and the curves A, B and C are determined.
(T) and Q _max are determined. Thereafter, Q (t) '(= Q
(T) + Q _c (t)) is obtained, and Q (t) ′ is compared with Q _max . When Q (t) ′ ≦ Q _max , the Y coordinate of the intersection e ₄ between the straight line X = Q (t) ′ and the curve D is obtained.
This Y coordinate is set as a set rotation speed n (t) ′. Also, Q
When (t) '> _Qmax , the set rotational speed n (t)' is set to n (t) '= _nmax .

When the calculation of the set rotation speed n (t) 'is completed, a rotation speed control flag is set in the pump (S
6). This rotation speed control flag is set until the rotation speed of the pump reaches the set rotation speed. During that time, the pump is excluded from rotation speed control.

Thereafter, the discharge amount increase ΔQ (= Q (t) ′ − Q (t)) due to the current rotation speed setting is obtained, and the remaining change amount Q _d (= Q _c (t) −ΔQ) is obtained. Ask for. If the remaining amount _Qd is 0 (or negative) (S7; YE
S), the rotation number setting process ends. If it is positive residual fraction Q _d is (S7; NO), the rotational speed of the remaining amount Q _d returns to step S4 after having set as a new pump target amount of change Q _c (t), 2 units th pump Perform ascent control.

On the other hand, the rotational speed lowering process basically takes the same procedure as the rotational speed increasing process. First, in the selection of the rotation speed lowering pump (S8), the same processing as the selection of the rotation speed increasing pump is performed, except that the shortest integrated operation time is used as a selection criterion as described above. Also in the rotation speed setting (S9), similarly to the case of the rotation speed increase process, the pump target change amount _Qc (t) is calculated using the pump characteristic curve and the water supply line resistance curve.
Because the actual head _{H t (t) Q min,} Q (t), obtaining the defines a Q _max Q (t) '. However, after this, Q (t) '
And Q _min, and when Q (t) ′ ≧ Q _min , an intersection between the straight line X = Q (t) ′ and the curve D is taken, and the Y coordinate of this intersection is set to a set rotation speed n ( t) 'and Q
When (t) '< _Qmin , the set rotational speed n (t)' is set to n (t) '= _nmin . Further, whether or not the pump discharge amount has been reduced by the initial value of the pump target change amount Qc (t) (S11) is based on whether or not Q _d ≧ 0.

FIG. 6 shows another embodiment of the pump operation control.

In the figure, the portion surrounded by the dashed line is added to the embodiment shown in FIG. Therefore, steps S1 to S11 are omitted to simplify the description.

When the pump target change amount is deduced in step S3, an unnecessary pump flag is set in step S31. The unnecessary pump flag setting function is as follows: (1) The number of operating pumps is two or more.

(2) The drainage water level change rate is continuously negative for a predetermined unnecessary pump stoppage determination time of, for example, 5 minutes.

(3) The total operating pump discharge amount is, for example, 90% of the total operating pump discharge amount excluding the next pump to be stopped.
Less than the amount.

Sometimes the unnecessary pump flag is set,
When any of the conditions (1), (2) and (3) is not satisfied, the unnecessary pump flag is cleared.

The condition (2) means that the amount of rainwater flowing into the pump well is reduced. The condition (3) is as follows.
This means that too many pumps are currently running. Therefore, the satisfaction of the conditions (1) to (3) indicates that the current number of pumps is one more than the incoming rainwater.

The unnecessary pump stoppage determination time in the condition (2) is arbitrarily set depending on the position of a water level gauge installed in a pump station or a sewer.

Also, in the condition (3), 90% of the total operating pump discharge excluding the next pump to be stopped is used as the comparison pump discharge of the unnecessary pump flag function because of the sudden rainfall after the pump stops. Therefore, even if the inflow into the pump well increases, the number of currently operating pumps can cope to some extent. Therefore, the 90% amount is arbitrarily set depending on the position of the water level gauge installed in the pump station and the sewer.

When the unnecessary pump flag is set in S31,
In S32, it is determined whether or not the unnecessary pump flag is set,
If set, an unnecessary pump is selected in S33.
At this time, if the pump to be stopped has the minimum rotation speed, the stop of the corresponding pump is instructed. If not, the rotation speed of the pump is instructed to the lowest.

On the other hand, if the unnecessary flag is not set in S32, in S4, Q _n (t) ≧ Q
It is determined whether _min (t) and Δt _f period.
As a result, whether the pump target amount of change Q _C of if not S41 at time (t) is Q _C = 0 is determined, Q _C = 0
If so, proceed to S1; if not, proceed to S5.
Acts the same as.

According to this embodiment, unnecessary pumps are selected based on the number of operating pumps, the rate of change in culvert water level, and the discharge rate of the pumps. Operation can be realized, and unnecessary pump operation can be avoided, and power consumption can be reduced.

FIG. 7 shows still another embodiment. In the figure, the same or corresponding parts as those in FIG. 6 are denoted by the same reference numerals, and description thereof will be omitted.

That is, in this embodiment, when it is determined that the inflow into the pump well decreases from the amount of rainfall and the rate of change in the drainage water level, means S5 for setting the operating pump to the maximum rotation speed is set.
1 and S52.

The function for setting the rotation speed maximum determination flag in S51 is as follows: (4) The number of operating pumps is one or more.

(5) The rainfall amount is a predetermined rotation speed maximum determination time of 0 (mm / min), for example, 5 minutes.

(6) The drainage water level change rate is continuously a negative value during the rotation speed determination time.

At this time, the rotation speed maximum judgment flag is set,
When any of the conditions (4), (5), and (6) is not satisfied, the rotation speed maximum determination flag is cleared.

The condition (5) means that there is no rainwater flowing into the sewer, and the condition (6) means that the rainwater flowing from the pump well will decrease. I do. Therefore, when the conditions (4) to (6) are satisfied, in order to quickly remove the rainwater stored in the sewer by the currently operating pump, the operating pump may be set to the maximum rotation speed.

[0059] The rotational speed maximum determined time that the pump field, location of the rain gauge, is arbitrarily set by the position of the water level gauge installed in Kanmizo, rain gauges, by the position of Kanmizo water gauge <br / Therefore, it is necessary to individually set the rotation speed maximum determination time.

By installing rain gauges, for example, upstream and downstream, control can be further improved.

In S52, it is determined whether or not the rotation speed maximum determination flag has been set in S51, and if the flag has been set, the flow proceeds to S10 to set the operating pump rotation speed.

If the flag is not set, S
At 32, it is determined whether an unnecessary pump flag is set, and the flow is executed in the same manner as in FIG.

Although the unnecessary pump flag functions S31 and S32 are also inserted in the embodiment shown in FIG. 7, the rotation speed maximum determination flag setting function may be added to the embodiment shown in FIG. Of course.

According to the present embodiment, when the conditions (4) to (6) are satisfied, the currently operating pump is controlled to the maximum rotation speed, and the rainwater stored in the sewer is promptly reduced. by removing the pump integrated operating time can be shortened, it is possible to reduce the consumption amount of electricity from a previously inflow water channel
By lowering the water level to the pump well,
It is possible to respond promptly to rainwater inflow .

[0065]

As described above, according to the present invention,
The following effects are obtained.

(1) The operation of the rainwater pump can be controlled not only by controlling the number of operating units but also by variable speed control, which contributes to the improvement of the operation efficiency of the rainwater pump facility.

(2) It is possible to automate (or semi-automate) the operation control of the rainwater pump, reduce the burden on the operator, and contribute to securing human resources, such as being advantageous for training the operator.

(3) Since the operation pump is selected in consideration of the accumulated operation time of each rainwater pump, the pump operation rate can be made uniform, and the life of the rainwater pump is improved.

(4) Number of operating pumps, rate of change in sewer water level,
Unnecessary pumps are selected based on the pump discharge amount, and the operation can be performed with the optimum number of operation units in consideration of the amount of rainwater flowing into the pump well. Therefore, unnecessary operation of the number of pump units can be avoided, and power consumption can be reduced.

(5) The currently operating pump is controlled to the maximum number of revolutions, and the accumulated rainwater in the sewer is promptly removed, so that the integrated operation time of the pump can be reduced, the power consumption can be reduced , and the inflow of the pump can be reduced in advance. Low water level from water channel to pump well
To quickly respond to future rainwater inflows
It is possible to do .

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing a configuration of the present invention.

FIG. 2 is a block diagram illustrating an outline of a system configuration of an embodiment apparatus.

FIG. 3 is a flowchart showing an outline of a pump operation control procedure.

FIG. 4 is a flowchart showing an outline of a procedure for setting a pump speed.

FIG. 5 is a graph showing an example of a pump characteristic curve and a water supply pipe resistance characteristic curve.

FIG. 6 is a flowchart of a second embodiment of the pump operation control means.

FIG. 7 is a flowchart of a third embodiment of the pump operation control means.

[Explanation of symbols]

 101 ... Pump well 102 ... Rainwater pump group 103 ... Outflow culvert 104 ... Pump well water level 105 ... Pump group target discharge amount 106 ... Target discharge amount calculation means 107 ... Rainfall amount in each part of the jurisdiction area 108 ... Water level in each part of the sewer 109] Pump Starting necessity degree 110 Pump necessity degree estimating means 111 Operating number control means 112 Rotation speed control means 113 Rotation speed correction pump selecting means 114 Rotation speed correction means 115 Outflow culvert water level 116 Actual head 117 Actual head Calculation means 118: Corrected rotation speed 119: Rotation speed calculation means

Continuation of the front page (72) Inventor Masahide Ichikawa 2-1-1-17 Osaki, Shinagawa-ku, Tokyo Inside Meidensha Co., Ltd. (56) References JP-A-4-179744 (JP, A) JP-A-56-1665783 (JP) , A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E03F 1/00 E03F 5/22 E03F 7/00

Claims (4)

(57) [Claims] 1. A pump well formed at a downstream side of a sewer laid in a jurisdiction area, a rainwater pump group attached to the pump well, and an outflow culvert for discharging pumped water by the rainwater pump group. In the apparatus for controlling the rainwater pump group in the rainwater removal equipment, the target discharge amount calculating means for obtaining the pump group target discharge amount based on the pump well water level, the pump group target discharge amount and the minimum discharge amount by the operating pump. Pumps based on the size relationship of
The number-of-operations control means for selecting the stop pump, and the number-of-operations control means for controlling the number of rotations of the operating pump based on the pump group target discharge amount, the number-of-operations control means stops the low number of rotations At least a priority condition of pump selection, wherein the rotation speed control means is based on rotation speed correction pump selection means for selecting a rotation speed correction pump from the operating pumps, and a change amount of the pump group target discharge amount. Rotation speed correction means for setting a correction rotation speed of the rotation speed correction pump, wherein the rotation speed correction pump selecting means has a short integrated operation time when the change amount of the pump group target discharge amount is positive. That is, at least a priority condition for selecting a pump, and when the change amount of the target discharge amount of the pump group is negative, a long integrated operation time is at least a priority condition for selecting a pump. Rainwater pump control apparatus characterized by. 2. The rainwater pump control device according to claim 1, further comprising: a pump start necessity predicting means for estimating a pump start necessity based on a rainfall amount in each part of the jurisdiction area and a water level in each part of the sewer. The control means is characterized in that, in addition to the magnitude relationship between the pump group target discharge amount and the minimum discharge amount by the currently operating pump, the fluctuation tendency of the pump start necessity is used as a reference for selecting a start pump / stop pump. And rainwater pump control device. 3. The rainwater pump control device according to claim 1, wherein said rotation speed correcting means includes an actual head calculating means for obtaining an actual head based on a pump well water level and an outflow culvert water level, and a feed from said actual head. A rotational speed calculating means for determining a water pipeline resistance curve, and using the water transmission pipeline resistance curve and the pump operation characteristic curve to obtain a corrected rotational speed based on the current rotational speed and the amount of change in the pump target discharge amount. A rainwater pump controller. 4. A pump well formed on a downstream side of a sewer laid in a jurisdiction area, a rainwater pump group attached to the pump well, and an outflow culvert for draining pumped water by the rainwater pump group. and the equipment for controlling the rainwater pump group in rainwater elimination facilities, and the target discharge quantity calculating means for calculating a pump group target discharge amount based on the water level of the pump well, the minimum discharge amount by the operating pump pumping group target discharge amount Operating number control means for selecting a start pump / stop pump based on the magnitude relationship between the number of operating pumps, and rotational speed control means for controlling the rotational speed of the operating pump based on the pump target discharge amount, wherein the rotational speed control means has a rotational speed maximum setting means, the number of rotations maximum setting means in operation pumps least one rainfall without a predetermined time, and the water level change rate of the sewer is negative continuously the predetermined time In
A rainwater pump controller characterized in that, in some cases , the number of revolutions is set to a maximum.