JP2018105303A - Pump control device and pump operating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pump control device and a pump operating method capable of effectively restricting a power consumption by controlling a starting and a stopping of a pump for operation under an effective utilization of capacity of pump facility.SOLUTION: This invention relates to a pump control device that is installed at a water storage facility comprising a water storage tank, a water level meter for measuring a water level at said water storage tank and a pump for adjusting the water level in said water storage tank. When the water level in the water storage tank measured by said water level meter becomes a starting water level, said pump is started and then when it becomes a stopping water level, said pump is stopped. As said water stopping level, the first water stopping level and the second water stopping level that is set to said starting water level side in reference to said first stopping water level on the basis of a consumption power per unit water feeding amount of said pump can be set and any one of said first stopping water level and said second stopping water level is set to said stopping water level with either a feeding-in water amount or a feeding-out water amount per a specified time for said water storage tank being applied as an index.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a pump control device and a pump operation method.

  The manhole pump equipment provided at the sewage relay pump station is a manhole that stores sewage flowing in from the inflow pipe at the end of the sewage transport pipe, a submersible pump that pumps the sewage stored in the manhole to the outflow pipe, and a manhole storage system. It has a water level sensor that measures the water level of the sewage.

  Such a manhole pump device includes a control unit that starts the submersible pump when the water level measured by the water level sensor reaches a predetermined pump start water level, and stops the submersible pump when the pump stop water level lower than the pump start water level is reached. It has.

  The submersible pump installed in the manhole is intended to drain the maximum inflow of sewage, so a model with a large capacity is selected, so it is operated with a high head and a small amount of water on the pump performance curve. In some cases.

  As the sewage is pumped to the outflow pipe by the submersible pump activated at the pump activation water level, the pumping head increases as the water level decreases, and the amount of pumped water decreases. That is, as the pump stop water level determined to be constant is approached, the efficiency is gradually lowered and the operation is shifted to a high head and small water volume region.

JP 2006-057567 A

  Since drainage facilities such as manhole pumps are designed based on preset planned drainage, etc., the actual drainage is more than the planned drainage in the middle stage until the population density etc. reaches the expected scale. However, when pumping to a constant pump stop water level in such a situation, there is a problem that the operation becomes inefficient and the area including the high head is increased, and the power consumption per unit water supply increases. It was.

  In addition, after the population density reaches a pre-estimated scale, there may be a situation where the actual amount of wastewater is less than the planned amount of wastewater due to population decline, etc. When pumped to the water level, there was a problem that the amount of power consumption per unit water supply increased.

  Such problems are not limited to manhole pump devices, but pump equipment for supplying water to water distribution areas (distribution tanks), pump equipment for irrigation water, and sewage treatment plants, etc. The same was true for the pumping equipment to be transferred.

  In view of the above-described problems, an object of the present invention is a pump capable of effectively suppressing power consumption by controlling the start and stop of the pump by effectively using the capacity of the pump equipment. A control device and a pump operation method are provided.

  In order to achieve the above-mentioned object, the first characteristic configuration of the pump control device according to the present invention is a water tank and a water level for measuring the water level of the water tank as described in claim 1 of the claims. And a pump that adjusts the water level of the water tank, and when the water level of the water tank measured by the water level meter becomes the starting water level, the pump is started, and then the stop water level is reached. A pump control device for stopping the pump, wherein the stop water level is a first stop water level and the start water level side based on the first stop water level based on a power consumption amount per unit water supply amount of the pump. The second stop water level set to be settable, and using either the inflow water amount or the outflow water amount per predetermined time for the water tank as an index, either the first stop water level or the second stop water level is Stop In that it is configured to set the position.

  For example, when the amount of inflow water or outflow water per predetermined time with respect to the water storage tank is large, frequent pump start-up can be avoided by setting the first stop water level to the stop water level and driving the pump. When the inflow water amount or outflow water amount per predetermined time with respect to the water storage tank is small, the pump is driven by setting the second stop water level set on the start water level side to the stop water level with reference to the first stop water level, Power consumption can be suppressed by operating in a region where the power consumption per unit water supply is low.

  As described in claim 2, the second characteristic configuration is based on the latest fluctuation of the water level measured by the water level meter, or the latest operation of the pump, in addition to the first characteristic configuration described above. The indicator is configured to calculate the index based on time.

  By monitoring the most recent water level fluctuation or the most recent operation time of the pump, it is possible to know the required amount of water delivered by the pump at that time, so it is sufficient to learn based on such information and set an appropriate stop water level. Operation that can reduce the amount of power consumption while maintaining a sufficient water supply capacity.

  As described in claim 3, the third characteristic configuration is a water storage facility comprising a water storage tank, a water level meter for measuring the water level of the water storage tank, and a pump for adjusting the water level of the water storage tank. A pump control device that is provided and starts the pump when the water level of the water tank measured by the water level gauge becomes a start water level, and then stops the pump when the water level reaches a stop water level, and the first stop as the stop water level A second stop water level set on the start water level side can be set on the basis of the first stop water level based on the water level and the amount of power consumption per unit water flow of the pump, and a predetermined time of the pump It is the point which is comprised so that either one of the said 1st stop water level and the said 2nd stop water level may be set to the said stop water level by using the starting frequency per hit.

  The pump provided in the water storage facility has a maximum activation frequency in a predetermined time. However, there is a margin in the start-up frequency except when the inflow water amount or the outflow water amount to the water storage tank becomes maximum. Therefore, based on the start frequency per predetermined time, the pump is driven by setting the second stop water level set on the start water level side to the stop water level with reference to the first stop water level, and the power consumption per unit water supply amount Power consumption can be suppressed by operating in a low-volume region.

  In the fourth feature configuration, as described in claim 4, in addition to any of the first to third feature configurations described above, the index is calculated in consideration of preset date and time information. There is in point.

  For example, water usage increases in the morning and evening in residential areas, and water usage increases in the daytime in factory areas. Pattern can be seen. If the index is calculated in consideration of such a characteristic pattern, the power consumption can be reduced more realistically.

  In the fifth feature configuration, as described in claim 5, in addition to any of the first to fourth feature configurations described above, the second stop water level can be variably set based on the index. It is in the point.

  When the water level of the second stop water level set on the start water level side with respect to the first stop water level is not fixed but is variably set based on the index, the power consumption can be reduced more flexibly. Become.

  In addition to any of the first to fifth feature configurations described above, the sixth feature configuration includes the first startup water level and the first startup water level as the startup water level, as described in claim 6. A second starting water level set on the opposite side to the stop water level as a reference is configured to be settable, and one of the first starting water level and the second starting water level is set to the starting water level based on the index. The point is that it is configured to be set to.

  By configuring the start water level to be switchable between the first start water level and the second start water level set on the opposite side of the stop water level with reference to the first start water level, the power consumption per unit water supply amount is further increased. It becomes possible to operate in a low amount region, and it is possible to more effectively reduce the power consumption.

  The seventh feature configuration is that, as described in claim 7, in addition to the sixth feature configuration described above, the second activation water level is configured to be variably set based on the index. .

  When the second startup water level set on the opposite side of the stop water level with respect to the first startup water level is not fixed but is variably set based on the index, the power consumption can be reduced more flexibly. become.

  In the eighth feature configuration, in addition to any one of the first to seventh feature configurations described above, the water storage facility is a manhole facility, and the second stop water level is the same as described in claim 8. It exists in the point comprised so that it may be set to a position higher than the effective water storage depth lower end water level of a manhole facility.

  In manhole facilities, the lower end water level of the effective water storage depth of the manhole is often set to the first stop water level. By setting the second stop water level higher than the lower end water level of the effective storage water depth, Operation with low power consumption is secured.

  In the ninth feature configuration, in addition to any one of the first to eighth feature configurations described above, the first stop water level is equal to or lower than the effective reservoir depth lower end water level of the manhole facility. When the pump is operated a predetermined number of times and / or when a predetermined time has elapsed with the second stop water level set to the stop water level, the first stop water level is set to the stop water level at least once. The pump is configured to operate.

  When the water storage tank is a drainage tank such as a manhole, organic matter such as soot and oils and fats mixed in the inflowing water is floated on the surface of the water to form a scum, thereby generating a strange odor inside. Even in such a case, the pump is operated a predetermined number of times and / or a predetermined time has passed with the first stop water level set to be equal to or lower than the effective lower water depth of the manhole facility and the second stop water level set to the stop water level. When the stop water level is set to the first stop water level and the pump is operated, the scum accumulated in the drain tank is drained by the pump and the tank is purified.

  In the tenth feature configuration, in addition to the ninth feature configuration described above, the startup water level and the second feature level are set so as to satisfy a preset minimum startup time interval of the pump. The stop water level is set.

  If the pump activation time interval is short, the pump motor may generate heat due to frequent activation, which may impair the life of the pump. However, by appropriately setting the start water level and the second stop water level, the required minimum start time interval of the pump can be satisfied, and the occurrence of the above-described disadvantageous situation can be avoided.

  The eleventh characteristic configuration is that, in addition to any one of the first to seventh characteristic configurations described above, the water storage facility is a reservoir facility.

  Even when the water storage facility is a distribution reservoir facility, the power consumption can be effectively reduced by operating in a region where the power consumption per unit water supply is low.

  According to the twelfth characteristic configuration, as described in claim 12, in addition to any one of the first to eleventh characteristic configurations described above, the pump has a discharge amount per unit time within a range to be used. This is a pump exhibiting the characteristic that the amount of electric power required to discharge the unit water amount decreases as the value increases.

  With respect to the pump having such characteristics, the power consumption can be effectively reduced.

  The thirteenth characteristic configuration is a water storage facility comprising a water storage tank, a water level meter for measuring the water level of the water storage tank, and a pump for adjusting the water level of the water storage tank as described in claim 13 And a pump control device that starts the pump when the water level of the water tank measured by the water level gauge becomes a startup water level, and then stops the pump when the water level reaches a stop water level. A second starting water level set on the stop water level side based on the first starting water level based on the starting water level and the power consumption per unit water supply amount of the pump is configured to be settable to the water tank. One of the first startup water level and the second startup water level is set as the startup water level with the inflow water amount or the outflow water amount per predetermined time as an index.

  For example, even with a pump such as an axial flow pump whose axial power increases as it approaches the deadline operation, the power consumption can be effectively reduced.

  The fourteenth characteristic configuration is a water storage facility comprising a water storage tank, a water level meter for measuring the water level of the water storage tank, and a pump for adjusting the water level of the water storage tank as described in claim 14 And a pump control device that starts the pump when the water level of the water tank measured by the water level gauge becomes a startup water level, and then stops the pump when the water level reaches a stop water level. A second starting water level set on the stop water level side based on the first starting water level based on the starting water level and the power consumption per unit water supply amount of the pump is configured to be settable. The configuration is such that either the first startup water level or the second startup water level is set as the startup water level using the startup frequency per hour as an index.

  Similar to the thirteenth characteristic configuration, for example, even a pump such as an axial pump whose axial power increases as it approaches the shut-off operation, the power consumption can be effectively reduced.

  The first characteristic configuration of the pump operation method according to the present invention is, as described in claim 15, a water storage tank, a pump that discharges stored water from the water storage tank, or flows the stored water into the water storage tank, A pump operation method that starts the pump when the water level of the water storage tank reaches a start water level and stops the pump when the water level reaches a stop water level, wherein the stop water level and the start water level are When the pump is operated between the stop water level and the start water level for discharging or flowing in the effective storage capacity of the water tank, which is configured to be set based on the power consumption per unit water supply amount of the pump The number of operations is more than the number of operations, and the predetermined inflow water amount or outflow water amount per predetermined time with respect to the water storage tank is satisfied.

  For the pump placed in the water tank, between the stop water level for discharging or inflowing the effective storage capacity of the water tank and the start water level, the stop water level in the region where the power consumption per unit pump water volume is low By selecting the starting water level and setting the number of operations more than the number of operations when operating the pump at the stop water level and the starting water level for discharging or flowing in the effective storage capacity, It becomes possible to reduce power consumption with respect to a predetermined inflow water amount or outflow water amount.

  In addition to the first feature configuration described above, the second feature configuration is the first stop for discharging or flowing in the effective storage capacity of the water tank as the stop water level. A second stop water level set on the start water level side can be set on the basis of the water level and the first stop water level, the second stop water level is the stop water level, and the first stop water level is the stop water level. As described above, the operation is performed more than the number of times of operation when the pump is operated, and the predetermined inflow water amount or outflow water amount per predetermined time with respect to the water storage tank is satisfied.

  When the pump is operated with the second stop water level as the stop water level rather than the number of operations when the pump is operated with the first stop water level as the stop water level while satisfying the predetermined inflow water amount or outflow water amount per predetermined time with respect to the water storage tank The power consumption can be effectively reduced by setting a large number of times of driving.

  In addition to the second feature configuration described above, the third feature configuration is based on the latest water level fluctuation measured by the water level gauge, or the most recent operation of the pump as described in claim 17. The second stop water level is set based on time.

  The fourth characteristic configuration is a water storage facility comprising a water storage tank and a pump that discharges the stored water from the water storage tank or allows the stored water to flow into the water storage tank as described in claim 18. The pump operating method is applied to start the pump when the water level of the water storage tank reaches the start water level, and then stop the pump when the water level reaches the stop water level, wherein the stop water level and the start water level are the unit feed of the pump. The stop water level is configured to be settable based on the power consumption per water amount, and the start water level is based on the first stop water level and the first stop water level for discharging or flowing in the effective storage capacity of the water tank. Number of operations when the second stop water level set on the water level side is settable, the pump is operated with the second stop water level as the stop water level, and the first stop water level as the stop water level. While performing remote multiple operation, in that it is configured to satisfy the starting frequency per predetermined time of the pump.

  Set the number of operations when the pump is operated with the second stop water level as the stop water level more than when the pump is operated with the first stop water level as the stop water level while satisfying the start frequency per predetermined time of the pump By doing so, the power consumption of the pump can be reduced.

  In the fifth feature configuration, as set forth in claim 19, in addition to any one of the second to fourth feature configurations described above, the second stop water level is set with preset date and time information. It is in the point which is comprised.

  In addition to any one of the second to fifth feature configurations described above, the sixth feature configuration is the manhole facility, and the first stop water level is the above-described feature configuration. A state where the effective water storage depth lower than the manhole facility is set below the lower water level, the second stop water level is set higher than the lower effective water depth of the manhole facility, and the second stop water level is set to the stop water level. When the pump is operated a predetermined number of times and / or when a predetermined time elapses, the pump is operated with the first stop water level set to the stop water level at least once.

  In the seventh feature configuration, in addition to the sixth feature configuration described above, the startup water level and the second feature configuration are set so as to satisfy a preset minimum startup time interval of the pump. The stop water level is set.

  In the eighth feature configuration, in addition to the first feature configuration described above, the first activation for discharging or flowing in the effective storage capacity of the water tank as the activation water level is the same as the first feature configuration described above. A second starting water level set on the stop water level side can be set with reference to the water level and the first starting water level, the second starting water level is the starting water level, and the first starting water level is the starting water level. As described above, the operation is performed more than the number of times of operation when the pump is operated, and the predetermined inflow water amount or outflow water amount per predetermined time with respect to the water storage tank is satisfied.

  When the pump is operated with the second starting water level as the starting water level, rather than the number of operations when the pump is operated with the first starting water level as the starting water level, while satisfying the predetermined inflow water amount or outflowing water amount per predetermined time with respect to the water storage tank The power consumption can be effectively reduced by setting a large number of times of driving.

  According to the ninth feature of the present invention, as described in claim 23, a water storage facility comprising a water storage tank and a pump that discharges the stored water from the water storage tank or allows the stored water to flow into the water storage tank. The pump operating method is applied to start the pump when the water level of the water storage tank reaches the start water level, and then stop the pump when the water level reaches the stop water level, wherein the stop water level and the start water level are the unit feed of the pump. The stop water level is configured to be settable based on the power consumption per water amount, and the stop water level is the first stop water level for discharging or flowing in the effective storage capacity of the water tank and the stop based on the first start water level. The number of operations when the second starting water level set on the water level side is settable, the second starting water level is the starting water level, and the pump is operated with the first starting water level being the starting water level. While performing remote multiple operation, in that it is configured to satisfy the starting frequency per predetermined time of the pump.

  Set the number of operations when operating the pump with the second starting water level as the starting water level more than the number of operations when operating the pump with the first starting water level as the starting water level while satisfying the starting frequency per predetermined time of the pump By doing so, the power consumption can be effectively reduced.

  As described above, according to the present invention, the pump control capable of effectively suppressing the power consumption amount by effectively using the capacity of the pump equipment and controlling the start and stop of the pump. An apparatus and a pump operation method can be provided.

Explanatory drawing of a manhole pump device to which the present invention is applied Explanatory drawing of pump control device Flow chart showing pump operation method Illustration of simulation results

  Below, the manhole pump apparatus to which the pump control apparatus and pump operation method by this invention are applied is demonstrated.

  As shown in FIG. 1, the manhole pump device 10 is a manhole 11 as a water storage tank for storing sewage flowing in from an inflow pipe 12, and the sewage stored in the manhole 11 is pumped to an outflow pipe 14 via a rise pipe 13. And a water level sensor 15 that measures the water level of the sewage stored in the manhole 11.

  Near the ground of the manhole pump device 10 is provided a control device 50 for controlling the start / stop of the submersible pump 20.

  A power supply line 57 for supplying power to the submersible pump 20 is wired between the control device 50 and the submersible pump 20, and a water level detection signal line 58 is wired between the control device 50 and the water level sensor 15.

  An input pressure type or bubble type water level sensor is used as the water level sensor 15 and is installed at the bottom of the manhole 11 so as to continuously detect the level of sewage stored in the manhole 11. Further, in preparation for failure of the water level sensor 15, a backup float type water level sensor 16 is installed at a height that causes an abnormally high water level, and the water level sensor 15 and the water level sensor 16 are configured to detect the abnormally high water level HHWL. Yes. In addition, you may comprise so that a water level may be measured with other well-known water level sensors, such as detecting a water level whenever it becomes a predetermined water level, using a float type water level sensor as a water level sensor.

  As shown in FIG. 2, the control device 50 stores a microcomputer 51 functioning as a control unit (hereinafter also referred to as “control unit 51”) and a control program executed by the microcomputer 51 and working. A memory 52 used as a region and a pump drive circuit 53 controlled by the microcomputer 51 are provided.

  Furthermore, a communication unit 54 or the like for inputting a monitor signal output from the microcomputer 51 and wirelessly communicating the manhole state to the external remote management device 55 is provided.

  Specifically, the start time of the pump grasped by the control unit 51, the number of start times per day, the presence or absence of occurrence of abnormally high water level, and an abnormal state such as abnormal heating detected by a sensor provided in the pump The information, the setting information of the pump start water level and the pump stop water level shown below, the time information thereof, and the like are transmitted to the remote management device 55 via the communication unit 54.

  The control unit 51 controls the pump drive circuit 53 based on the water level measured by the water level sensor 15 to start and control the electric motor 30 of the submersible pump 20. For example, when the pump drive circuit 53 is configured by an inverter circuit, the rotational speed of the electric motor 30 is controlled, and when the pump drive circuit 53 is configured by a relay circuit for power supply, the power supply state to the motor 30 Is controlled.

  When the water level sensor 15 detects that the water storage amount has reached the pump activation water level HWL, the controller 51 activates the electric motor 30 (hereinafter also referred to as “activate the submersible pump”), and the downstream side of the sewage by the submersible pump 20. When the pump stop water level LWL is measured and the pump stop water level LWL is measured, the electric motor after a predetermined time has elapsed, that is, after the time required to pump the water amount corresponding to the water level from the stop water level LWL to the vicinity of the suction port 24 has elapsed. 30 is stopped and discharge of sewage by the submersible pump 20 is stopped.

  The control unit 51 is set as the stop water level LWL on the start water level HWL side, that is, on the high water level side with reference to the first stop water level LWL1 and the first stop water level LWL1 set to the effective lower water depth of the manhole facility. The second stop water level LWL2 is configured to be settable, and one of the first stop water level LWL1 and the second stop water level LWL2 is set as the stop water level LWL using the inflow water amount or the outflow water amount per predetermined time with respect to the manhole 11 as an index. Is configured to do.

  Further, the control unit 51 sets, as the starting water level HWL, the first starting water level HWL1 and the second starting water level HWL2 set on the side opposite to the stop water level LWL, that is, on the high water level side with respect to the first starting water level HWL1. Based on the index, one of the first startup water level HWL1 and the second startup water level HWL2 is set to the startup water level HWL.

  For example, when the amount of inflow water or outflow water per predetermined time with respect to the manhole 11 is large, frequent pump activation is avoided by setting the first stop water level LWL1 to the stop water level LWL and driving the submersible pump 20. When the inflow water amount or outflow water amount per predetermined time with respect to the manhole 11 is small, the second stop water level LWL2 set on the start water level HWL side with respect to the first stop water level LWL1 is set as the stop water level LWL. Then, the submersible pump 20 is driven. By the latter control, it becomes possible to suppress the power consumption by avoiding the operation in the region where the power consumption per unit water consumption is high.

  By configuring the start-up water level HWL to be switchable between the above-described first start-up water level HWL1 and the second start-up water level HWL2 set on the opposite side of the stop water level LWL with reference to the first start-up water level HWL1, It becomes possible to operate in a region where the amount of power consumption per unit water supply is low, and it is possible to reduce the power consumption more effectively. It should be noted that at least the stop water level may be configured to be switchable.

  The index for setting the stop water level LWL and the start water level HWL is the amount of inflow water per predetermined time with respect to the manhole 11, and when there is a large amount of inflow water per predetermined time, it is necessary to avoid frequent start and stop of the pump. The stop water level LWL is set to the 1 stop water level LWL1, and the start water level HWL is set to the first start water level HWL1 in order to avoid overflow.

  Conversely, when the amount of inflow water per given time is small, consumption per unit water supply is avoided in order to avoid operation in areas where the head is large and the water level is low, i.e., where the power consumption per unit water supply is high. The stop water level LWL is set to the second stop water level LWL2 where the amount of electric power is low, and the start water level HWL is set to the second start water level HWL1.

  The amount of inflow water per predetermined time can be determined based on the latest rising speed of the water level measured by the water level meter 15 when the submersible pump 20 is stopped, and the average water level within the predetermined time can be increased to improve accuracy. It is possible to make a determination based on the ascending speed, and the index may be calculated in consideration of the latest operation time of the submersible pump 20.

  In the latter case, if the operation time of the submersible pump 20 from the start water level HWL to the stop water level LWL is long, it can be determined that the amount of inflow water per predetermined time is large, and the time from the start water level HWL to the stop water level LWL is reached. If the operation time of the submersible pump 20 is short, it can be determined that the amount of inflow water per predetermined time is small.

  By monitoring the most recent water level fluctuations or the most recent operation time of the pump, the necessary amount of water delivered by the pump at that time can be known, so by learning the situation based on such information and setting an appropriate stop water level Thus, it is possible to perform an operation capable of reducing the power consumption while maintaining a predetermined water supply amount required at that time.

  Furthermore, it is preferable to calculate a specific numerical value of the inflow water amount per predetermined time based on the amount of electric power required for the outflow of the unit water amount to the manhole 11, and use it as an index. By setting such an index, the pump is operated in a region where the amount of electric power required for the outflow of the unit water amount is further reduced.

  Further, the index may be calculated in consideration of preset date and time information. For example, the amount of water used increases in the morning and evening in residential areas, and the amount of water data increases in the daytime in factory areas, depending on the time of day, or the day of the week (weekdays) A more characteristic pattern can be seen on weekends). If the index is calculated in consideration of such a characteristic pattern, the power consumption can be reduced more realistically.

  Since such date / time information varies from region to region, the individual date / time information is wirelessly transmitted from the remote management device 55 to the communication unit 54 of each manhole pump device 10 and stored in the memory 52. preferable.

  It is preferable that the second stop water level LWL2 and / or the second activation water level HWL2 is configured to be variably set based on the index, and it is possible to further reduce the power consumption by flexibly responding to fluctuations in the inflow water amount. It becomes possible. For example, when the amount of inflow water per predetermined time is very small, the power consumption can be further reduced by setting the second stop water level LWL2 and / or the second startup water level HWL2 further upward.

  Further, the submersible pump 20 is operated a predetermined number of times and / or a predetermined time has passed in a state where the first stop water level LWL1 is set to be equal to or lower than the effective lower water depth of the manhole facility and the second stop water level LWL2 is set to the stop water level LWL. Then, it is preferable that the first stop water level LWL1 is set to the stop water level LWL at least once and the submersible pump 20 is operated.

  When the water storage tank is a drainage tank such as a manhole 11, organic matter such as soot and oils and fats mixed in the inflowing water is floated on the surface of the water, and a scum is formed in a film shape, thereby generating a strange odor inside. Even in such a case, the pump is operated a predetermined number of times while the first stop water level LWL1 is set to be equal to or lower than the effective water storage depth lower end water level of the manhole facility, and the second stop water level LWL2 above it is set to the stop water level. When the pump is operated with the stop water level LWL set to the first stop water level LWL1 when a predetermined time has elapsed, the scum accumulated in the manhole 11 is drained by the submersible pump 20, and the purification of the manhole 11 is performed. It comes to be.

  Moreover, it is preferable that the starting water level HWL and the 2nd stop water level LWL2 are set so that the preset minimum starting time interval of the submersible pump 20 may be satisfy | filled.

  When the pump activation time interval is short, an increase in power consumption due to frequent activation and heat generation of the electric motor of the pump may occur, which may impair the life of the electric motor, that is, the pump. However, by appropriately setting the start water level and the second stop water level, the preset minimum start time interval of the pump can be satisfied, and the occurrence of the above-described disadvantageous situation can be avoided.

  As shown in FIG. 4, the pump needs to be a pump that exhibits a characteristic that the amount of power required to discharge the unit water amount decreases as the discharge amount per unit time increases in the range to be used.

Based on the flowchart shown in FIG. 3, a pump operation method executed by the pump control unit 51 having characteristics similar to those in FIG. 4 will be described.
When the control unit 51 reads the index from the memory 52 (S1) and determines that the value is lower than a preset threshold value, that is, the amount of inflow per unit time is small (S2), the starting water level is set to HWL2. When the water level is set to LWL2 (S3) and it is determined that the amount of inflow per unit time is large (S2), the start water level is set to HWL1 and the stop water level is set to LWL1 (S11).

  When the start water level is set to HWL2 and the stop water level is set to LWL2 (S3), and the water level in the manhole 11 becomes equal to or higher than the start water level HWL2 (S4), the pump is started and the pump start counter is incremented (S5). The value of the pump activation counter is initially set to 0, and is incremented by 1 every time it is activated.

  If the value of the pump activation counter is less than a preset threshold value N (N = 6 in this embodiment) (S6), the pump is driven until the water level drops with reference to the stop water level LWL2 (S8). Then, it is driven until the water level drops with reference to the stop water level LWL1, and when the water level falls below the stop water level LWL1 (S7), the value of the pump start counter is reset to 0 (S9). Stopped (S10).

  That is, the pump is stopped when the water level reaches the stop water level LWL2 until the value of the pump start counter reaches N = 6, and the pump is stopped when the water level reaches the stop water level LWL1 when the value of the pump start counter reaches N = 6. . Thereby, the scum accumulated in the manhole 11 is crushed and pumped together with sewage downstream.

  When the start water level is set to HWL1 and the stop water level is set to LWL1 in step S11, when the water level of the manhole 11 becomes equal to or higher than the start water level HWL1 (S12), the pump is started (S13), and the water level becomes equal to or lower than the stop water level LWL1. (S14) The submersible pump 20 is stopped after a predetermined time has elapsed (S15).

  That is, the pump operation method according to the present invention is applied to a water storage facility including a water storage tank and a pump that discharges the stored water from the water storage tank or allows the stored water to flow into the water storage tank, and activates the water level of the water storage tank. A pump operation method that starts the pump when the water level is reached and then stops the pump when the water level is stopped. The stop water level is based on the first stop water level and the first stop water level for discharging the effective storage capacity of the water tank. The second stop water level set on the start water level side is configured to be settable, the second stop water level is set as the stop water level, and the number of operations is larger than the number of operations when the pump is operated with the first stop water level as the stop water level. And a predetermined inflow water amount or outflow water amount per predetermined time with respect to the water storage tank is satisfied.

  Further, the second stop water level is set based on the latest water level fluctuation measured by the water level gauge or based on the latest operation time of the pump.

  The water storage facility is a manhole facility, the first stop water level is set to be lower than or equal to the lower effective water depth of the manhole facility, and the second stop water level is set to be higher than the lower effective water depth of the manhole facility. The pump is operated by setting the first stop water level to the stop water level at least once when the pump is operated a predetermined number of times with the second stop water level set to the stop water level and / or when a predetermined time has elapsed. Has been.

Based on FIG. 4, the simulation result of this invention is demonstrated.
FIG. 4 shows characteristic lines of the total head, efficiency, and shaft power of the manhole pump. The range from 9m to 4m in total head was divided into 5 sections from section A to E at intervals of 1m, the median of the head of each section was taken as the average head, and the discharge amount and shaft power for the average head were extracted in the table. And the 1m discharge electric energy at that time (electric power consumption per unit water supply amount) was computed.

  Here, the 1 m discharge electric energy is an electric energy consumed to discharge 1 m in height assuming a water tank having the same cross section. Since the tanks have the same cross-sectional area, the amount of water discharged by 1 m in height is always the same.

  For example, when discharging 10 m of the head, when it is set to operate in the sections B and A (the head 2 m), if the sections B and A are operated five times, (2.58 + 3.36) × 5 = 29 The amount of electric power of 0.7 kWmin = 0.495 kWh (100%) is required.

  It can be seen that if the operation is performed 10 times only in the section B (lift 1 m), 2.58 × 10 = 25.8 kWmin = 0.43 kWh (86.9%), and reduction of power consumption can be achieved.

  When only the section B (lift 1 m) is operated 8 times and then the sections A and B (lift 2 m) are operated once, 2.58 × 9 + 3.36 = 26.58 kWmin = 0.443 kWh (89.5%), The scum can be removed by operating the sections B and A while achieving low power consumption.

  It can be seen that low power consumption can be achieved for the sections E and D by the same simulation.

  For example, when discharging the lift of 15 m, if it is set to operate in the sections C, B, A, driving the sections C, B, A (lift 3 m) five times (2.09 + 2.58 + 3. 36) x5 = 40.15 kWmin = 0.669 kWh (100%), driving section C (lifting height 1 m) every time 2.09 × 15 = 31.35 kWmin = 0.523 kWh (78.2%) Thus, it can be seen that a reduction in power consumption can be achieved.

  To remove scum, if section C (lift 1m) is operated 12 times and sections C, B, and A (lift 3m) are operated once, 2.09 × 13 + 2.58 + 3.36 = 33.11kWmin = 0.552kWh (82.5%), it can be seen that a reduction in power consumption can be achieved while scum can be removed.

  It has been clarified that similar results can be obtained by performing the same calculation even when driving in other sections, for example, sections E, D, and C.

Hereinafter, another embodiment will be described.
In the embodiment described above, the mode in which both the stop water level and the start water level are switched and set has been described. However, at least the stop water level may be switched and set.

  In the embodiment described above, the case where the water storage facility is a manhole facility has been described, but the present invention can also be applied to a distribution reservoir (distribution tank) that supplies clean water. That is, as the stop water level, the first stop water level and the second stop water level set on the start water level side can be set with reference to the first stop water level, and the amount of effluent water per predetermined time with respect to the water tank is used as an index. Any one of the first stop water level and the second stop water level may be set to the stop water level.

  When there is little demand per unit time of water from the distribution reservoir (distribution tank), power consumption is stopped by stopping pumping to the distribution reservoir at the second stop water level lower than the first stop water level. Can be suppressed.

  Similarly, as the starting water level HWL, the first starting water level HWL1 and the second starting water level HWL2 set on the side opposite to the stop water level LWL, that is, the low water level side can be set with reference to the first starting water level HWL1. Based on the index, one of the first startup water level HWL1 and the second startup water level HWL2 may be set to the startup water level HWL.

  And what is necessary is just to be comprised so that an parameter | index may be calculated based on the electric energy required for the outflow of the unit water quantity with respect to a water tank.

  In the above-described embodiment, the mode in which one of the first stop water level and the second stop water level is set as the stop water level using the inflow water amount or the outflow water amount per predetermined time with respect to the water storage tank as an index has been described. As an index for setting the value, the frequency of starting the pump per predetermined time may be used.

  For example, referring to the manhole pump facility technical manual, the minimum starting interval of the 7.5 kW pump is set to 6 minutes. Assuming a case where two such pumps are provided in the manhole pump device and the two pumps are operated alternately, the minimum starting interval is apparently 3 minutes for the two pumps.

  In such a manhole pump device, as one of the methods for switching the stop water level to either the first stop water level or the second stop water level, when the start water level is reached, the time elapsed since the last stop at the stop water level ( An example of the pump activation frequency per predetermined time) may be confirmed, and the stop water level may be determined based on the elapsed time.

  In the pump design, the minimum activation interval is secured in consideration of the maximum inflow amount into the tank, so that the activation interval is longer than the minimum activation interval if the inflow water amount is normal. Therefore, at the initial stage of construction, the second stop water level is adopted as the initial value of the stop water level. If the start water level is reached within 3 minutes after the pump is stopped, the stop water level is switched to the first stop water level. What is necessary is just to comprise so that a stop water level may be maintained at a 2nd stop water level if it is 3 minutes or more.

  When the discharge capacity at the second stop water level (storage capacity from the start water level to the second stop water level) is about ½ of the discharge capacity at the first stop water level (storage capacity from the start water level to the first stop water level) If the previous stop water level is the first stop water level and the time to reach the start water level from the time the pump was stopped is 6 minutes or more, the start interval may be 3 minutes or more even if the stop water level is the second stop water level. Since it is predicted, the stop water level may be switched to the second stop water level, and the stop water level may be maintained at the first stop water level within 6 minutes.

  In addition, when the operation of only a normal pump is performed in a state where one pump has failed, the reference value of the time to reach the starting water level from when the pump was stopped may be increased from 6 minutes to 12 minutes. . In addition, when the performance of the two pumps is different or when the operation time is unbalanced due to a failure or the like, the above reference value may be doubled as the time from the previous operation of the relevant unit.

  As described above, when the frequency of starting the pump per predetermined time is low, it is possible to suppress power consumption by operating in a region where the power consumption per unit water supply is low.

  As another method of switching the stop water level between the first stop water level and the second stop water level based on the start frequency per predetermined time of the pump, a method of determining the stop water level according to the number of start times per unit time is adopted. May be.

  Since the minimum start interval is 3 minutes in the pump device according to the above example, the stop water level is set to the first stop water level when the start frequency of the past 30 minutes reaches 10 times, and the stop water level is set to the second stop when the start frequency is less than 10 times. What is necessary is just to comprise so that it may set to a stop water level. In this case, considering the possibility that the activation interval is less than the minimum activation interval, it is desirable that the activation frequency number for switching the stop water level is about half of the above number.

  In the above-described example, the second stop water level and the first stop water level are set to the fixed water level, the first stop water level is set when the activation frequency per predetermined time of the pump exceeds the threshold value, and the activation frequency falls below the threshold value, the first Although the structure which switches to 2 stop water levels was demonstrated, you may comprise so that a 2nd stop water level may be variably set according to starting frequency.

  When the activation frequency falls below the threshold value, the second stop water level is set on the start water level side if the degree is large, and the second stop water level is set on the first stop water level side if the degree is small. That is, the second stop water level may be variably set on the start water level side based on the first stop based on the index.

  In the example in which the elapsed time from the time of stopping at the above-mentioned stop water level is the start frequency, if the previous stop water level is the first stop water level and the time to reach the start water level since the pump was stopped is 6 minutes or more The second stop water level may be set closer to the start water level. For example, when the second stop water level is set at a place where the discharge capacity is 1/3 or 1/4, the interval for switching to the second stop water level may be 9 times 3 times and 12 minutes 4 times.

  Depending on the frequency of starting the pump per predetermined time, it may be difficult to continue operation at a fixed second stop water level, but the second stop water level set at that time is an index based on the first stop water level. May be set variably on the starting water level side, that is, on the first stop water level side. For example, when the time to reach the start water level is 6 minutes or less, for example, if it is 4 minutes 30 seconds, a position that is 1/2 of the first stop water level and the second stop water level is set as a new second stop water level. do it. Although the flow rate per unit time varies depending on the water level, it is described here as being uniform.

  As described above, when the pump is variably set to the second stop water level start water level set at that time depending on the start frequency per predetermined time, the power consumption can be reduced more flexibly. Reduction in power consumption can be achieved.

  In the embodiment described above, the present invention has been described by taking as an example a pump that exhibits a characteristic that the amount of electric power required to discharge a unit water amount decreases as the discharge amount per unit time increases in the range to be used. Even if it is a pump such as an axial flow pump whose shaft power increases as it approaches the deadline operation, select the stop water level and the start water level in the region where the power consumption per unit water volume of the pump is low, and the effective storage capacity By setting the number of operations more than the number of operations when the pump is operated at the stop water level and the start water level for discharging or flowing in, it is possible to suppress the power consumption.

  The pump control device and the pump operation method described above are merely examples, and it is needless to say that the design can be changed as appropriate within the scope of the effects of the present invention.

10: Manhole pump device 12: Inflow pipe 11: Manhole 13: Rising pipe 14: Outflow pipe 15, 16: Water level sensor 20: Submersible pump 50: Controller 51: Control unit (microcomputer 52: Memory 53: Pump drive circuit 54 : Communication unit LWL: stop water level LWL1: first stop water level LWL2: second stop water level HWL: start water level HWL1: first start water level HWL2: second start water level

Claims (23)

A water tank provided with a water tank, a water level meter that measures the water level of the water tank, and a pump that adjusts the water level of the water tank, and the water level of the water tank measured by the water level gauge is an activation water level A pump control device that starts the pump when it becomes and then stops the pump when the stop water level is reached,
As the stop water level, a first stop water level and a second stop water level set on the start water level side based on the first stop water level based on the power consumption per unit water supply amount of the pump can be set. Configured,
A pump control device configured to set one of the first stop water level and the second stop water level to the stop water level using an inflow water amount or an outflow water amount per predetermined time with respect to the water storage tank as an index.   2. The pump control device according to claim 1, wherein the index is calculated based on the most recent fluctuation of the water level measured by the water level gauge or in consideration of the most recent operation time of the pump. A water tank provided with a water tank, a water level meter that measures the water level of the water tank, and a pump that adjusts the water level of the water tank, and the water level of the water tank measured by the water level gauge A pump control device that starts the pump when it becomes and then stops the pump when the stop water level is reached,
As the stop water level, a first stop water level and a second stop water level set on the start water level side based on the first stop water level based on the power consumption per unit water supply amount of the pump can be set. Configured,
A pump control device configured to set one of the first stop water level and the second stop water level as the stop water level, using the start frequency per predetermined time of the pump as an index.   The pump control device according to any one of claims 1 to 3, wherein the index is calculated in consideration of preset date and time information.   The pump control device according to any one of claims 1 to 5, wherein the second stop water level is configured to be variably set based on the index. As the starting water level, a first starting water level and a second starting water level set on the side opposite to the stop water level on the basis of the first starting water level are configured to be settable,
The pump control device according to any one of claims 1 to 5, wherein one of the first startup water level and the second startup water level is set to the startup water level based on the index.   The pump control device according to claim 6, wherein the second startup water level is configured to be variably set based on the index.   The pump according to any one of claims 1 to 7, wherein the water storage facility is a manhole facility, and the second stop water level is set to be higher than an effective stored water lower end water level of the manhole facility. Control device.   When the first stop water level is set to be equal to or lower than the lower effective lower water level of the manhole facility and the second stop water level is set to the stop water level, the pump is operated a predetermined number of times and / or a predetermined time has elapsed, The pump control device according to any one of claims 1 to 8, wherein the pump control device is configured to operate the pump by setting the first stop water level to the stop water level at least once.   The pump control apparatus according to claim 9, wherein the start water level and the second stop water level are set so as to satisfy a preset minimum start time interval of the pump.   The pump control device according to any one of claims 1 to 7, wherein the water storage facility is a reservoir facility.   The pump control device according to any one of claims 1 to 11, wherein the pump is a pump having a characteristic that an amount of electric power necessary to discharge a unit water amount decreases as a discharge amount per unit time increases. A water tank provided with a water tank, a water level meter that measures the water level of the water tank, and a pump that adjusts the water level of the water tank, and the water level of the water tank measured by the water level gauge is an activation water level A pump control device that starts the pump when it becomes and then stops the pump when the stop water level is reached,
As the starting water level, a first starting water level and a second starting water level set on the stop water level side based on the first starting water level based on the power consumption per unit water supply amount of the pump can be set. Configured,
A pump control device configured to set one of the first startup water level and the second startup water level as the startup water level using an inflow water amount or an outflow water amount per predetermined time with respect to the water storage tank as an index. A water tank provided with a water tank, a water level meter that measures the water level of the water tank, and a pump that adjusts the water level of the water tank, and the water level of the water tank measured by the water level gauge is an activation water level A pump control device that starts the pump when it becomes and then stops the pump when the stop water level is reached,
As the starting water level, a first starting water level and a second starting water level set on the stop water level side based on the first starting water level based on the power consumption per unit water supply amount of the pump can be set. Configured,
A pump control device configured to set one of the first startup water level and the second startup water level as the startup water level, using the startup frequency per predetermined time of the pump as an index. Applied to a water storage facility comprising a water storage tank and a pump that discharges the stored water from the water storage tank or allows the stored water to flow into the water storage tank, and activates the pump when the water level of the water storage tank reaches an activation water level Then, the pump operation method of stopping the pump when the stop water level is reached,
The stop water level and the startup water level are configured to be settable based on power consumption per unit water supply amount of the pump,
More than the number of times of operation when the pump is operated between the stop water level and the start water level for discharging or flowing in the effective storage capacity of the water tank, a predetermined time per predetermined time for the water tank A pump operation method configured to satisfy an inflow water amount or an outflow water amount. As the stop water level, a first stop water level for discharging or flowing in an effective storage capacity of the water tank and a second stop water level set on the start water level side based on the first stop water level can be set. And
When the pump is operated with the second stop water level as the stop water level and the first stop water level as the stop water level, a greater number of operations are performed, and a predetermined inflow water amount per predetermined time with respect to the water storage tank Or the pump operation method of Claim 15 comprised so that the amount of outflow water may be satisfy | filled.   The pump operation method according to claim 16, wherein the second stop water level is set based on a latest water level fluctuation measured by the water level gauge or based on a latest operation time of the pump. Applied to a water storage facility comprising a water storage tank and a pump that discharges the stored water from the water storage tank or allows the stored water to flow into the water storage tank, and activates the pump when the water level of the water storage tank reaches an activation water level Then, the pump operation method of stopping the pump when the stop water level is reached,
The stop water level and the startup water level are configured to be settable based on power consumption per unit water supply amount of the pump,
As the stop water level, a first stop water level for discharging or flowing in an effective storage capacity of the water tank and a second stop water level set on the start water level side based on the first stop water level can be set. And
The pump is operated more frequently than the number of times of operation when the pump is operated with the second stop water level as the stop water level and the first stop water level as the stop water level, and the start frequency per predetermined time of the pump is satisfied. The pump operation method is configured as follows.   The pump operation method according to any one of claims 16 to 18, wherein the pump is configured to set the second stop water level based on preset date and time information.   The water storage facility is a manhole facility, the first stop water level is set to be lower than or equal to the lower effective water depth of the manhole facility, and the second stop water level is set to be higher than the lower effective water depth of the manhole facility. When the pump is operated a predetermined number of times with the second stop water level set to the stop water level and / or when a predetermined time has elapsed, the first stop water level is set to the stop water level at least once. The method of operating a pump according to any one of claims 16 to 19, wherein the pump is operated.   The pump operation method according to claim 20, wherein the starting water level and the second stop water level are set so as to satisfy a preset minimum starting time interval of the pump. As the starting water level, a first starting water level for discharging or flowing in an effective storage capacity of the water tank and a second starting water level set on the stop water level side based on the first starting water level can be set. And
When the pump is operated with the second startup water level as the startup water level and the first startup water level as the startup water level, a predetermined number of inflows per predetermined time with respect to the water tank are performed. Or the pump operation method of Claim 15 comprised so that the amount of outflow water may be satisfy | filled. Applied to a water storage facility comprising a water storage tank and a pump that discharges the stored water from the water storage tank or allows the stored water to flow into the water storage tank, and activates the pump when the water level of the water storage tank reaches an activation water level Then, the pump operation method of stopping the pump when the stop water level is reached,
The stop water level and the startup water level are configured to be settable based on power consumption per unit water supply amount of the pump,
As the stop water level, a first start water level for discharging or flowing in an effective storage capacity of the water tank and a second start water level set on the stop water level side based on the first start water level can be set. And
The pumping frequency per predetermined time of the pump is satisfied while performing more operations than the number of times of operation when the pump is operated with the second starting water level as the starting water level and the first starting water level as the starting water level. The pump operation method is configured as follows.

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