JP5005052B2 - Water supply pump control device and water supply pump control method - Google Patents

Description

  The present invention relates to a control device for a water supply pump, and more specifically, water supply that can reduce leakage of tap water stored in a water supply facility or the like when a water leak occurs in a water supply facility or a firefighting water tank facility due to a disaster. The present invention relates to a pump control device and a feed water pump control method.

  Ensuring a certain level of water supply in the event of a disaster such as a large-scale earthquake is a responsibility of the water utility. In particular, hospitals are required to have a system that can continue operations even in the event of an earthquake. In response to such requests, many large hospitals have established a so-called water tank-elevated water tank type water tank water system that supplies tap water supplied from the Waterworks Bureau through a water tank or elevated water tank. The tap water stored in the tank is prepared for emergencies.

  According to the water storage tank water system of the water receiving tank-high water tank system, even when the water supply is cut off, a constant water supply is possible using the water stored in the water receiving tank or the high water tank. Moreover, since the elevated water tank uses the drop pressure, water can be supplied at a constant water pressure even during a power failure. In the event of an earthquake disaster, efforts will be made to restore public infrastructure as soon as possible, but there are limits to the early restoration of water supply and electricity, and a certain amount of time is required. Therefore, in the event of an earthquake disaster, in order to reduce the amount of emergency water supply by the government, it is possible to maintain the water supply for as long as possible by utilizing the tap water stored in the above-mentioned water tank water as effectively as possible. desired.

On the other hand, when analyzing the recent earthquake disaster cases in the hospitals and the current situation of earthquake response, there is a problem that precious stored water and emergency water supply can be lost due to water leakage. In general, there are many facilities where electric power is restored earlier than water supply, and a certain amount of electric power is secured by private power generation. With the restoration of power supply or with the operation of the private power generator, power supply to the water supply pump for supplying water from the water receiving tank to the elevated water tank is started. Then, the water supply pump starts water supply in response to the water level of the elevated water tank reaching a predetermined level regardless of the damage of the elevated water tank body, piping, and equipment. In this case, the operation of the water supply pump causes a water amount that cannot be ignored from the capacity of the water receiving tank to be lost in a short period of time. Depending on the amount of water supplied by the water supply pump and the damage situation at the leak location, for example, if water is supplied at a rate of ˜1.7 m ³ / min for a capacity of 100 m ³ in the water receiving tank, many of these will be washed away and several minutes As a result, the amount corresponding to the majority of the amount of water stored in the water receiving tank is wasted.

  On the other hand, in order to secure the tap water stored in the water receiving tank and the elevated water tank at the time of the earthquake, the water pump is forcibly stopped at the time of the earthquake using the seismic sensor, or the emergency shutoff valve is used at the time of the earthquake. A water supply system that shuts off a water pipe is also provided (for example, Patent Document 1 and Patent Document 2).

  Regardless of whether or not water leakage has occurred in response to the occurrence of a predetermined level of earthquake, the water pump is temporarily stopped and the power is turned on manually. If the confirmation work is carried out quickly and accurately, it is possible to respond to requests for prevention of water leakage and continuation of operations in hospitals.

  However, the range of water supply management in hospitals is extensive, and damage is wide ranging to the end of the faucet. Therefore, early recovery is difficult unless the manager is an expert who understands the entire water tank water supply from the water meter to the end of the faucet, is familiar with the procedures of the emergency system, and is well aware of the system. In addition, earthquake disasters do not always occur during the day, and it is practically difficult to arrange skilled personnel until night, and in the case of absence on Saturdays, Sundays, national holidays, etc. It takes time to arrive.

  Furthermore, even if it is a skilled person in charge, since the management range covers a wide range as described above, a certain amount of time is required for the work of confirming water leakage. In addition, when water leakage occurs in underground underground pipes, it is generally difficult to detect the leakage, requiring time, and it is difficult to accurately detect water leakage. Therefore, it is difficult to quickly and accurately confirm the presence or absence of water leakage and manually restart the water supply pump.

  On the other hand, as a method of detecting water leakage other than visual inspection, for example, there is a method of inspecting the flow rate with a flow meter in a state where all the water taps are closed (for example, Patent Document 3). However, this method can detect even a small amount of water leakage during normal times, but it must be confirmed that all the water taps have been closed. From the standpoint of real-time performance, it is not sufficient. In addition, there is an emergency shut-off valve that sets a threshold value for the flow rate in addition to the earthquake occurrence condition, but the basis for the threshold value is weak, the value is fixed, and it was not necessarily able to shut off in response to the occurrence of water leakage .

JP 2001-254854 A JP 2008-57561 A JP-A-10-1982

  As described above, hospitals and the like have private power generation because they are required to continue their work during the earthquake. There are also facilities that uniformly stop or block water supply regardless of whether water leaks occur. This is not necessarily an optimal facility response. Therefore, even if the in-house power generation is automatically activated instead of stopping or shutting off the water evenly when a certain level of earthquake occurs, the grounds conform to the facility scale of the water tank and the characteristics of the facility where the water tank is installed. It has been desired to develop a technology capable of quickly stopping the water supply pump while detecting the occurrence of water leakage based on the above. In addition, if there is no damage, it has been desired to develop a technology capable of responding to the operation of private power generation even during off-hours so that the water held in the water receiving tank can be used for emergency water supply via the elevated water tank.

  The present invention has been made in view of the above-described problems in the prior art, and the present invention uniformly stops or shuts off water supply in the case of an earthquake disaster in a water tank-type water tank water tank system. Instead, the water supply pump control apparatus and the water supply pump control method can detect the occurrence of water leakage and quickly stop the water supply pump on the basis of the facility scale of the water tank water supply and the characteristics of the facility where the water tank water supply is provided. The purpose is to provide.

In order to solve the above problems, the present invention provides a feed water pump control device having the following characteristics. The water supply pump control device of the present invention identifies an operation control means for controlling the operation of a plurality of water supply pumps according to an input from a sensor installed in the elevated water tank, operation information of each of the water supply pumps, and identifies the water supply pump And recording means for recording the operation result data in association with the time information, and the operation result data of the feed water pump controlled by the operation control means is accumulated. The water supply pump control device of the present invention further analyzes the operation result data with the operation information associated with the identification value indicating each specific water supply pump as an analysis target, and the load amount for quantifying the load of the specific water supply pump A calculation means for calculating a stop condition including a threshold value that indicates occurrence of water leakage and a determination as to whether the stop condition is met.If the condition is met, the operation of a plurality of water pumps is performed regardless of the control by the operation control means. Stop determination means for stopping.

Furthermore, according to this invention, the feed water pump control method which the feed water pump control apparatus which has the following characteristics performs is provided. The feed water pump control method of the present invention is characterized in that the feed water pump control device has an identification value for identifying the feed water pump, an operation value of the feed water pump operated in response to an input from a sensor installed in the elevated water tank , a time A specific water pump that suggests the occurrence of water leakage by analyzing the operation information associated with the step of recording the operation result data in association with the information and the operation information associated with the identification value indicating the specific water pump. A step of calculating a stop condition including a threshold for the load amount, a step of determining whether the stop condition is met, and a step of stopping the operations of the plurality of water supply pumps when the stop condition is met. including.

  According to the above configuration, water leakage occurs by detecting abnormal operation based on the accumulated operation results of the water supply pump, rather than stopping or shutting off the water supply uniformly regardless of whether or not water leakage has occurred. It is possible to quickly stop the water supply pump by capturing signs with high probability. In addition, the above abnormal operation is detected based on the stop condition obtained according to the operation results of the water supply pump, and there is a basis that takes into account not only the size of the water supply equipment but also the usage status and characteristics of the facility where the water supply pump is installed. The feed water pump is stopped based on the stop condition.

Schematic which shows the facility provided with the water tank water supply. The figure which shows embodiment of the water supply system comprised including the pump control panel of this invention. The functional block diagram of the water supply system comprised including the pump control panel by embodiment of this invention. The figure which illustrates the water level relevant to an elevated water tank. The figure which illustrates the time-dependent change of the supply amount (A) from a water supply to a water receiving tank, the water level (B) of a high water tank, and the supply amount (C) from a high water tank. The figure which illustrates the data structure which the pump control panel of this invention uses. The flowchart which shows the feed water pump control method which the pump control panel of this embodiment performs. The flowchart which shows the stop condition determination process in specific embodiment.

  Hereinafter, although this invention is demonstrated with specific embodiment, this invention is not limited to embodiment mentioned later.

  FIG. 1 is a diagram showing an outline of a facility provided with a water tank. The facility 100 shown in FIG. 1 is a facility such as a hospital, for example, and includes a first water receiving tank building 110 provided with a water receiving tank 112 and a second building 120 provided with a high water tank 122 on the roof. Including.

  The water receiving tank 112 stores tap water drawn from the distribution pipe 102 via the water meter 104. The tap water stored in the water receiving tank 112 is pumped to the roof of the building 120 by the water supply pump 114 and stored in the elevated water tank 122 provided on the roof. In the illustration of FIG. 1, thereafter, the water is supplied to the faucet 126 and the fire-extinguishing water tank 125 in the building 120 due to the water pressure due to the height difference of the elevated water tank 122.

  The feed water pump 114 shown in FIG. 1 is a feed water pump that supplies the tap water stored in the water receiving tank 112 to the elevated water tank 122, and the operation is controlled by the pump control panel of the present invention. The pump control panel according to the present invention calculates a stop condition that suggests the occurrence of water leakage according to the operation results of the water supply pump 114, and stops the operation of the water supply pump when the stop condition is met. Regardless of the occurrence of water leakage, the water supply pump 114 is continuously operated to suitably prevent the damage of water leakage from being increased.

  In the facility 100 shown in FIG. 1, leakage of water in the section of the water supply pipe 116 connected to the elevated water tank 122 from the water supply pump 114 of the water receiving tank 112 and the section of the water supply pipe 124 connected to each water tap 126 from the elevated water tank 122. However, this is a suitable detection target of the present invention. FIG. 1 illustrates a facility to which the pump control panel of the present invention can be suitably applied, and the facility to which the pump control panel of the present invention can be applied is limited to that shown in FIG. It is not a thing.

  FIG. 2 is a diagram showing an embodiment of a water supply system including the pump control panel of the present invention. The water supply system shown in FIG. 2 includes a water receiving tank 112, a water supply pump 114, and a pump control panel 130 that controls the operation of the water supply pump 114. The intake port of the water supply pump 114 is connected to the outlet of the water receiving tank 112 via a valve, a flexible joint, and a water supply pipe 118, and the discharge port is connected to a high water tank 122 (not shown) via the valve and the water supply pipe 116. Connected.

  The water supply pump 114 is a so-called pump, and draws in tap water stored in the water receiving tank 112 and pumps it into the elevated water tank 122 under the control of the pump control panel 130. In addition, although the one water supply pump 114 is shown in FIG. 2, the water supply pump 114 may be provided with two or more units | sets, In that case, it can be set as the structure which carries out independent alternating operation or parallel alternating operation. . In the following description, an embodiment in which two water supply pumps 114a and 114b are used to perform independent and alternating operation will be described as an example.

  The pump control panel 130 receives supply of electric power from a commercial power source or a private power generator, and controls the supply of electric power to the feed water pump 114. The pump control panel 130 is associated with an electrode group associated with the idling prevention water level and the like provided inside the water receiving tank 112, and with a pump stop water level and a pump activation water level provided within the elevated water tank 122. A signal from the electrode group is input. The pump control panel 130 controls the turning on and off of power to the water supply pump 114 in accordance with signals from these electrode groups, and controls the operation of the water supply pump 114.

  FIG. 3 is a functional block diagram of a water supply system including a pump control panel according to an embodiment of the present invention. The water supply system shown in FIG. 3 includes two water supply pumps 114a and 114b, a pump control panel 130, a private power generation device 150, a water receiving tank water level sensor 152, and an elevated water tank water level sensor 154.

  The pump control panel 130 operates by receiving power supplied from the private power generator 150 or a commercial power source. It should be noted that the elements indicated by the short dotted lines in FIG. 3 indicate arbitrary elements. Therefore, the pump control panel 130 is not necessarily connected to the private power generator 150. In addition, the pump control panel 130 shown in FIG. 3 does not show an element for controlling the water supply on the water receiving tank 112 side, but a control circuit for a solenoid valve of a water supply pipe from the water supply to the water receiving tank 112 or the like is used for the pump control panel. 130 may be provided.

  The pump control panel 130 includes a normal operation control unit 132. The normal operation control unit 132 is an operation method such as a single parallel method according to a signal input from the high water tank water level sensor 154 installed in the high water tank 122. The operation of each feed pump 114 is controlled according to the above. Control of the operation of each water supply pump 114 can be performed by turning on and off power to the water supply pumps 114a and 114b, and the normal operation control unit 132 of the present embodiment opens and closes an internal relay switch to supply the water supply pumps. The power is turned on and off to 114a and 114b.

  The elevated water tank water level sensor 154 is an electrode group installed in the elevated water tank 122 described above and associated with various water level levels. As the water level of the elevated water tank 122, there are a pump start water level, a pump stop water level, a reduced water alarm water level, a full water alarm water level, and the like. Among these, the pump start water level and pump stop water level electrodes related to the operation of the feed pump 114 Is input to the normal operation control unit 132.

  FIG. 4 illustrates the water level associated with the elevated water tank 122. The normal operation control unit 132 detects from the signal from the water level sensor 154 that the water level of the stored water in the elevated water tank 122 has decreased to the pump activation water level, and to either the first water supply pump 114a or the second water supply pump 114b. The power supply is started and alternately activated. When the normal operation control unit 132 detects that the water level in the elevated water tank 122 has risen to the pump stop water level while any of the water supply pumps 114 is operating, the normal operation control unit 132 cuts off the power supply to the water supply pump 114 in operation and stops the operation. Let The pump starting water level is generally adjusted to approximately one third of the capacity of the elevated water tank 122. From the viewpoint of securing the amount of water at the time of the earthquake, the pump starting water level is increased by about 30%. Thereby, although the frequency | count of operation increases, the amount of water holding of the high water tank 122 can be increased.

  The normal operation control unit 132 can also control the operation of each water supply pump 114 in response to a signal input from the water tank water level sensor 152 installed in the water tank 112. The water tank level sensor 152 is an electrode group associated with various water level levels installed in the water tank 112 described above. The water level of the water receiving tank 112 includes a water supply start water level, a water supply stop water level, a water reduction warning water level, a pump anti-rotation water level, a full water warning water level, and the like. Of these, the pump anti-slip water level related to the operation of the water supply pump 114 is included. Signals from the electrodes are input to the normal operation control unit 132. Signals from the electrodes at the water supply start water level and the water supply stop water level are used to control the electromagnetic valve on the water supply side to the water receiving tank 112.

  Further, the normal operation control unit 132 detects from the signal from the water level sensor 152 that the water level of the water stored in the water receiving tank 112 has dropped to an abnormal water level that may cause the pump to run idle. The power supply 114 is cut off and stopped.

  As described above, the normal operation control unit 132 operates while alternately switching the first feed water pump 114a and the second feed water pump 114b, and the water level in the elevated water tank 122 is within the range of the pump start water level and the pump stop water level shown in FIG. To maintain. The electrodes related to the water level warning water level and the full water warning water level of the water level sensors 152 and 154 are appropriately input to an alarm device (not shown), and an abnormality occurs when the alarm device detects that the water level has been reached. Raise an alarm.

  In addition to the normal operation control unit 132 that controls the normal operation of the feed water pump 114, the pump control panel 130 of the present invention further includes a pump operation result recording unit 134, a result data storage unit 136, and a stop condition calculation unit 138. And a pump stop determination unit 140 and relay switches 142a and 142b. In other embodiments, the normal operation control unit 132 may be configured as an external unit.

  The pump operation result recording unit 134 is connected to a power line that supplies electric power from the normal operation control unit 132 to each of the first feed water pump 114a and the second feed water pump 114b, and detects the start and stop of each feed water pump 114. The pump operation result recording unit 134 detects the start and stop of the water supply pump 114 and writes the operation information to the time information and the association result data storage unit 136. This written data is referred to as operation result data.

  The actual data storage unit 136 is provided as a storage area of a non-volatile memory such as an EEPROM or a flash memory, and stores operation information as history information in a first-in first-out format, for example. go.

  The stop condition calculation unit 138 analyzes the operation result data recorded in the result data storage unit 136, and calculates a stop condition including a threshold for the load amount of the water supply pump 114 that suggests the occurrence of water leakage. Here, the load amount quantifies the load of the water supply pump until reaching the pump stop water level from the pump activation water level by the elevated water tank water level sensor 154 in the normal operation control of the normal operation control unit 132. As the load amount, for example, operation time can be adopted. In this case, the pump operation result recording unit 134 records the pump start time and the pump stop time or the pump operation time as the operation result data.

  However, any index can be adopted as the load amount as long as it is an index that is generally correlated with the amount of water sent from the water supply pump 114 toward the elevated water tank 122. In another embodiment, the pump operation result recording unit 134 monitors the amount of power supplied to each of the first feed water pump 114a and the second feed water pump 114b by a power amount sensor or the like, and from the pump start time and the start thereof. The amount of electric power by the pump operation until the stop can be recorded as operation result data. In the following description, a case where the operation time is a load amount will be described.

  The operation time of the feed water pump from reaching the pump start water level to the pump stop water level is usually the water feed performance of the feed water pump 114 and other elevated water tanks 122 when all the faucets 126 in the facility are closed. Depending on the height of the water supply pipe 116, the size of the water supply pipe 116, and the like. However, when water is used in the water supply, the one operation time varies depending on the amount of water used per unit time in the facility. The interval from when the water supply pump 114 is stopped to when it is restarted, that is, the pump startup interval also varies according to the change in the amount of water used per unit time in the facility.

  FIG. 5 shows changes over time of the supply amount (A) from the water supply to the water receiving tank, the water level (B) of the elevated water tank, and the supply amount (C) from the elevated water tank measured in a hospital. FIG. 5 shows measurement data for two days. FIG. 5A shows the supply amount of the water receiving tank for each time zone, and graphs the value of the water meter from the water supply to the water receiving tank for each time zone.

  FIG. 5B shows the change over time in the water level of the elevated water tank, and the water level of the elevated water tank fluctuates so as to go back and forth between the pump start water level and the pump stop water level. Comparing FIGS. 5 (A) and 5 (B), it can be seen that the fluctuation of the water level in the elevated water tank correlates well with the amount supplied to the water receiving tank. This indicates that tap water is supplied from the water supply to the water receiving tank so as to compensate for the amount of water pumped by the water supply pump 114 and contributed to the rise in the water level of the elevated water tank.

  FIG. 5C is a graph showing the supply amount from the elevated water tank for each time zone. The amount supplied from the elevated water tank is the amount of water corresponding to the amount used by the faucet 126 or the like. Comparing FIGS. 5 (B) and 5 (C), it can be seen that the water level of the elevated water tank correlates well with the supply amount from the elevated water tank shown in FIG. 5 (C). This indicates that when the amount of water corresponding to the pump working water level from the pump stop water level is used from the elevated water tank, the pumping to the elevated water tank is correspondingly started and recovered to the pump stop water level. ing.

  Further, FIG. 5 shows data for two days, but it can be seen that the trends of the respective measurement days are almost the same. In other words, it can be seen that by tracking the water level of the elevated water tank, the trend of the water usage of the entire facility can be grasped well. Therefore, in the present invention, a feature suggesting the occurrence of water leakage is detected using the operation time of the water supply pump that is strongly correlated with the fluctuation of the water level of the elevated water tank as an index. Furthermore, in a specific embodiment, it is possible to capture a feature that suggests the occurrence of water leakage using the activation interval of the water supply pump as an index.

  For example, when water leakage occurs in the water supply pipe 116 shown in FIG. 1 at the time of an earthquake disaster or the like, a part of the water discharged from the water supply pump 114 leaks, so that one operation time of the water supply pump 114 becomes long. Further, when water leakage occurs in the water supply pipe 124 after the elevated water tank shown in FIG. 1, the amount of water used per unit time is apparently increased, so that one operation time of the water supply pump 114 becomes longer. Furthermore, when water leakage occurs in the water supply pipe 124, the activation interval from the pump stop to the pump activation is shortened, and the pump activation frequency is increased.

  Therefore, in order to detect such water leakage, the stop condition calculation unit 138 of the present embodiment calculates a certain threshold value for the operation time as the load amount as the stop condition. More specifically, the stop condition calculation unit 138 reads the operation result data, analyzes the analysis target information among the stored operation information, and calculates the correlation with the maximum operation time among these. For example, the maximum operating time in the analysis target can be determined as a threshold that must not be exceeded, or a value obtained by adding a predetermined safety value (margin) to the maximum operating time as a threshold that must not be exceeded Can do. The safety value may be determined at the discretion of the administrator as appropriate, and a value set in advance by the administrator is held in the nonvolatile memory of the pump control panel 130.

  The above-mentioned analysis object means an object within the period when a data analysis period is designated in advance by the administrator (for example, the latest two weeks). Furthermore, in the alternate operation method, a water supply pump having the same characteristics is usually provided, but actual performance may deteriorate due to changes over time, and performance differences may occur between the water supply pumps due to repair, replacement, and the like. In order to absorb such individual differences, only the operation information corresponding to the water supply pump to be determined can be the analysis target.

  In addition, in hospitals and the like, there is a case where there is a large variation in the trend of the amount of use for each day of the week, such as the tendency of the amount of water used is different between weekdays and holidays, and a specific day is a bathing day. Therefore, the stop condition calculation unit 138 of the present invention can also analyze only operation information corresponding to a specific day of the week or a range of days of the week. Thus, by narrowing down the analysis target, the reliability of the threshold value calculated as the stop condition can be increased.

  FIG. 6 shows a data structure used by the pump control panel 130 of the present invention. FIG. 6A illustrates the data structure of operation result data that the pump operation result recording unit 134 writes in the result data storage unit 136. The operation result data shown in FIG. 6A includes a column for recording a pump number for identifying a pump, a start date and time, a day of the week, and an event identification value. The event identification value refers to a value indicating whether the water supply pump 114 is activated (“1 (ON)”), stopped (“0 (OFF)”), or the like.

  FIG. 6B illustrates a data structure indicating a stop condition including a threshold value calculated for each feed water pump. As shown in FIG. 6B, a threshold value can be calculated for each pump in order to reflect individual differences of each pump. In this case, the stop condition calculation unit 138 first extracts only the operation information corresponding to the water supply pump from the operation result data shown in FIG. 6A for each water supply pump, and the event identification values are “1” and “ The operating time is calculated from a set of records having a value of “0”, and the threshold value of each pump is calculated by obtaining the maximum value.

  FIG. 6C illustrates a data structure showing stop conditions including thresholds calculated for each feed pump and each day of the week, according to a specific embodiment. As shown in FIG. 6C, a threshold value can be calculated for each pump and for each day of the week in order to reflect the individual difference of each pump and to reflect the characteristics of water use on each day of the week in the facility. . In this case, the stop condition calculation unit 138 extracts only the operation information corresponding to the water pump and the day of the week for each water supply pump as an analysis target, calculates the operation time, and obtains the maximum value. The threshold for each pump and each day of the week can be calculated.

  Furthermore, since the occurrence of water leakage also affects the start interval from the pump stop to the pump start as described above, in a specific embodiment, in addition to the threshold for the operation time or the electric energy, the threshold for the load amount A certain threshold value for the pump activation interval may be calculated and included in the stop condition. In this case, the stop condition calculation unit 138 can read the operation result data, analyze the accumulated operation information, and calculate the threshold value by correlating with the shortest start interval among them. . As such a stop condition, for example, the activation interval may be less than a threshold value, and the operating time may exceed the threshold value.

  In addition, in a specific embodiment performed in conjunction with the seismic device 144, conditions for an input signal from the seismic device 144 can be overlapped. For example, the stop condition can be that a signal indicating that a seismic sense has been received from the seismic device 144 and that the operating time has exceeded a threshold value. Furthermore, the conditions for the input signal from the water tank water level sensor 152 and the elevated water tank water level sensor 154, or the alarm water level electrode of any one of them can be overlapped.

  For example, a stop condition may be that a signal indicating the water level warning water level of the elevated water tank water level sensor 154 is input and the operating time exceeds a threshold value. Or when the signal which shows the water reduction warning water level of the elevated water tank water level sensor 154 is input, the signal which shows the water reduction warning water level of the elevated water tank water level sensor 154 is input with the maximum operating time in the analysis target as a threshold value. If not, the value obtained by adding the safety value to the maximum operating time can be used as the threshold value. That is, the threshold value can be set in multiple stages in combination with other conditions.

  When the stop condition calculation unit 138 of the present embodiment calculates and obtains the stop condition, the stop condition calculation unit 138 sets the stop condition in the pump stop determination unit 140. The pump stop determination unit 140 is connected to a power line that supplies power from the normal operation control unit 132 to each of the first feed water pump 114a and the second feed water pump 114b, and detects the operating state of each feed water pump 114. The relay switches 142a and 142b are respectively inserted in power lines that supply power from the normal operation control unit 132 to the first water supply pump 114a and the second water supply pump 114b, and are connected to the pump stop determination unit 140, and are opened and closed. It is controlled. The pump stop determination unit 140 detects the operating state of each water supply pump 114, determines whether or not the stop condition is met, and opens the relay switch 142a and the relay switch 142b when they match, thereby supplying the water pump The operations of 114a and 114b are forcibly stopped.

  Hereinafter, the feed pump control method of the present invention will be described with reference to a flowchart. FIG. 7 is a flowchart showing a feed water pump control method executed by the pump control panel 130 of the present embodiment. The process shown in FIG. 7 is started from step S100 in response to the input of power to the pump control panel 130. The stop condition calculation unit 138 reads the accumulated operation result data in step S101, calculates the stop condition as described above in step S102, and calculates the calculated stop condition in step S103. Set to.

  When the initialization process shown in steps S101 to S103 is completed, in step S104, the normal operation control unit 132 starts a normal pump operation. In step S105, the normal operation control unit 132 monitors the signal from the elevated water tank water level sensor 154 and determines whether or not the pump activation water level shown in FIG. If it is determined in step S105 that the pump starting water level has not yet been reached (NO), in step S106, the system waits for a predetermined time and loops to step S105. On the other hand, if it is determined in step S105 that the pump starting water level has been reached (YES), the process proceeds to step S107.

  In step S107, the normal pump control unit 132 activates a water supply pump other than the previously activated water supply pump. In step S108, the pump operation result recording unit 134 indicates the pump number of the water supply pump and the activation of the water supply pump 114. The operation information including the event identification value is associated with the time information such as the date and time and stored in the result data storage unit 136. In step S109, the normal pump control unit 132 monitors the signal from the elevated water tank water level sensor 154 and determines whether or not the pump stop water level shown in FIG. 4 has been reached. If it is determined in step S109 that the pump stop water level has not yet been reached (NO), the process proceeds to step S110.

  In step S110, the pump stop determination unit 140 determines whether or not the stop condition set in step S103 is met. For example, it is determined whether or not the operating time has exceeded a threshold value corresponding to the pump number of the water pump 114 that is currently operating in the data structure shown in FIG. If it is determined in step S110 that the stop condition is not met (NO), in step S111, the process waits for a predetermined time and loops to step S109.

  On the other hand, if it is determined in step S109 that the pump stop water level has been reached (YES), the process proceeds to step S112. In step S112, the normal pump control unit 132 stops the feed water pump that was previously operated. In step S113, the pump operation result recording unit 134 stores operation information indicating the stop of the feed water pump 114 in the result data storage unit 136. Remember. In step S114, the normal pump control unit 132 determines whether or not the stop condition needs to be updated. In step S114, for example, when daily update is designated, it is determined that the stop condition needs to be updated when it is detected that the date has been changed since the previous operation. If an update for each predetermined period is specified, it is determined that an update is necessary when it is detected that the predetermined period has elapsed, and an update is required every time an update is specified for each operation It will be determined.

  If it is determined in step S114 that the stop condition needs to be updated (YES), the process loops to step S102, and the stop condition is recalculated. On the other hand, if it is determined in step S114 that updating of the stop condition is unnecessary (NO), the process loops to step S105 and waits until the pump starting water level is reached again.

  On the other hand, if it is determined in step S110 that the stop condition is met (YES), the process proceeds to step S115. In step S115, the pump stop determination unit 140 opens the relay switches 142a and 142b to forcibly cut off the power supply to the water supply pump 114. In step S116, the pump operation result recording unit 134 stops the water supply pump 114. Is stored in the result data storage unit 136 together with the time information.

  In step S117, it is determined whether a return instruction has been received manually or remotely. Here, the remote return instruction is an instruction by remote communication via a network such as the Internet. If it is determined in step S117 that a return instruction has not been received (NO), in step S118, a predetermined time is waited, and the process loops to step S117. If it is determined in step S117 that a return instruction has been received (YES), the process loops to step S105 to continue normal driving operation.

  According to the embodiment described above, instead of stopping or shutting off the water supply uniformly regardless of the occurrence of water leakage at the time of the occurrence of an earthquake disaster, by detecting abnormal operation based on the accumulated performance of the water supply pump, It is possible to quickly stop the water supply pump by catching a highly probable sign of leakage. In addition, the abnormal operation is detected based on the stop condition calculated from the operation results of the water supply pump, and there are grounds that take into account not only the size of the water supply equipment but also the usage status and characteristics of the facility where the water supply pump is installed. The feed water pump is stopped based on the stop condition. Therefore, even in facilities such as hospitals that require continuation of operations in the event of an earthquake, if there is no damage, the water held in the receiving tank will be urgently supplied via the elevated water tank in response to the operation of private power generation even outside of work hours. While it is possible to cope with it, when the probability of occurrence of water leakage is high, it is possible to stop the water supply pump promptly and prevent the loss of valuable water at the time of the earthquake.

  Hereinafter, stop conditions in a specific embodiment will be described. FIG. 8 is a flowchart illustrating a stop condition determination process executed by the pump stop determination unit 140 according to a specific embodiment. The process of FIG. 8 corresponds to the process of step S110 shown in FIG. 7, branches from step S109 shown in FIG. 7, and proceeds to step S201. The stop condition determination process shown in FIG. 8 is stopped when the seismoscope 144 responds to an earthquake of a level higher than the specified level as a stop condition and exceeds either of two threshold values in combination with a warning level. It is a condition to do.

  In step S201, the pump stop determination unit 140 monitors a signal from the seismic device 144 and determines whether or not the seismic device 144 has been activated. If it is determined in step S201 that the seismoscope is not operating (NO), since leakage detection is not required for earthquake response, the process branches to step S111 shown in FIG. If it is determined in step S201 that the seismoscope is operating (YES), the process branches to step S202.

  In step S202, the pump stop determination unit 140 determines whether any of the elevated water tank water level sensor 154 and the water receiving tank water level sensor 152 has reached the warning water level. If it is determined in step S202 that the warning water level has been reached (YES), the process proceeds to step S203. In step S203, the pump stop determination unit 140 determines whether or not the operation time has exceeded the first threshold value. The first threshold value is a threshold value that is applied when a warning is issued, and a strict value is set. For example, the maximum operating time in the analysis target can be set as it is.

  If it is determined in step S203 that the threshold value has not been exceeded (NO), it is determined that the stop condition is not satisfied, and the process branches to step S111 illustrated in FIG. On the other hand, if it is determined in step S203 that the threshold has been exceeded (YES), it is determined that the stop condition is satisfied, and the process branches to step S115 illustrated in FIG.

  On the other hand, if it is determined in step S202 that the warning water level has not been reached (NO), the process proceeds to step S204. In step S204, the pump stop determination unit 140 determines whether the operating time has exceeded the second threshold value. This second threshold value is a threshold value that is applied when no warning is issued, and is set to a value that is more relaxed than the first threshold value. For example, a value provided with a margin for the maximum operating time in the analysis target is set. If it is determined in step S204 that the threshold value has not been exceeded (NO), it is determined that the stop condition is not satisfied, and the process branches to step S111 shown in FIG. On the other hand, if it is determined in step S204 that the threshold has been exceeded (YES), it is determined that the stop condition is satisfied, and the process branches to step S115 illustrated in FIG.

  According to the embodiment described with reference to FIG. 8, it is possible to detect the occurrence of water leakage due to the earthquake more reliably by cooperating with the seismic device 144. Further, by adopting a multi-stage threshold value in combination with various levels already present in a water tank-elevated water tank system such as an alarm water level, the threshold value can be set moderately.

  As described above, according to the embodiments described above, in the water tank system of the receiving tank-elevated tank system, the facility scale of the water tank system is not used, but the water supply is not stopped or shut off uniformly when an earthquake occurs. In addition, it is possible to provide a water supply pump control device and a water supply pump control method capable of detecting the occurrence of water leakage and quickly stopping the water supply pump based on the grounds suitable for the characteristics of the facility where the water tank is provided.

  As described above, the water supply pump control device of the present invention can quickly determine whether or not the water supply pump needs to be stopped according to the damage situation of the water supply piping at the time of disaster such as an earthquake. It can be installed as an earthquake disaster countermeasure in facilities that require continuation of operations in the event of a disaster.

  Although the embodiments of the present invention have been described so far, the embodiments of the present invention are not limited to the above-described embodiments, and those skilled in the art may conceive other embodiments, additions, modifications, deletions, and the like. It can be changed within the range that can be done, and any embodiment is included in the scope of the present invention as long as the effects of the present invention are exhibited.

DESCRIPTION OF SYMBOLS 100 ... Facility, 102 ... Water distribution pipe, 104 ... Water meter, 106, 116, 118, 124 ... Water supply piping, 110 ... Receiving tank building, 112 ... Receiving tank, 114 ... Water supply pump, 120 ... Building, 122 ... Elevated water tank , 125 ... Fire extinguishing water tank, 126 ... Water tap, 130 ... Pump control panel, 132 ... Normal operation control unit, 134 ... Pump operation result recording unit, 136 ... Result data storage unit, 138 ... Stop condition calculation unit, 140 ... Pump stop Judgment part 142 ... Relay switch 144 ... Seismic device 150 ... Private power generator 152 ... Water tank water level sensor 154 ... High water tank water level sensor

Claims (6)

A plurality of feed pumps for supplying tap water stored in the water receiving tank to the elevated water tank, and controlling the plurality of feed pumps;
Operation control means for controlling the operation of each of the water supply pumps according to an input from a sensor installed in the elevated water tank;
The water supply pump each of operation information, the identification value for identifying the water supply pump, respectively, a recording means for recording the operation record data in association with time information,
An operation for analyzing the operation result data with the operation information associated with an identification value indicating a specific feedwater pump as an analysis target, and calculating a stop condition including a threshold value indicating the occurrence of water leakage for the load amount of the specific feedwater pump Means,
A water supply pump control device comprising: a stop determination unit that determines whether or not the stop condition is met and stops the operation of the plurality of water pumps regardless of the control by the operation control unit when the condition is met.   The load amount is an operation time or an electric energy amount of the water supply pump that is required until the water level of the elevated water tank reaches from a start level to a stop level by the sensor, and the calculation means includes an analysis that the operation result data includes The feed water pump control device according to claim 1, wherein the threshold value is calculated in correlation with a maximum operating time or electric energy in the target. 3. The feed pump control according to claim 1 , wherein the time information includes day information, and the calculation unit calculates the threshold value by using operation information associated with day information indicating a specific day of the week as an analysis target. apparatus. A water supply pump control device that controls a plurality of water supply pumps that supply tap water stored in a water receiving tank to the elevated water tank, the water supply pump control device comprising:
Recording operation information of the water supply pump operated in response to an input from a sensor installed in the elevated water tank as operation result data in association with an identification value for identifying the water supply pump and time information; ,
Analyzing operation information associated with an identification value indicating a specific water pump, reading and analyzing the operation result data, and calculating a stop condition including a threshold value that suggests occurrence of water leakage for the load amount of the specific water pump And steps to
Determining whether the stop condition is met;
And a step of stopping the operations of the plurality of feed water pumps when the stop condition is met. The load amount is an operation time or an electric energy of the water supply pump that is required until the water level of the elevated water tank reaches from a start level to a stop level by the sensor, and the calculating step includes the operation result data. The feed water pump control method according to claim 4 , comprising the step of calculating the threshold value in correlation with the maximum operating time or the amount of power in the analysis target. The time information includes a day of the week information, wherein the step of calculating, as the analysis target of operation information day information is associated indicating a particular day, including the step of calculating the threshold value, according to claim 4 or 5 Water pump control method.