JP5717260B1 - Water storage system and water storage amount control method - Google Patents

Abstract

In a water storage system for supplying potable water to a building, a system capable of controlling the amount of water in a water tank on demand according to a required situation is provided. A reservoir 300 for storing drinking water, a control means 308 for maintaining the water level of the reservoir 300 at a predetermined level equal to or lower than a full water level, and predicting the occurrence of a disaster, Emergency predicting means for operating the control panel 308 to inject to a full water level exceeding a predetermined level. When the control panel 308 detects a signal from the emergency prediction means, the control panel 308 starts the opening control of the primary water supply control valve 303 to maximize the amount of water stored in the water storage tank 300. [Selection] Figure 3

Description

  The present invention relates to a storage tank management technique, and more particularly to a technique for controlling the amount of water in a storage tank on demand according to a required situation.

  It was inevitable that water outages could not be avoided due to past earthquakes. Responsible for ensuring a stable supply of schools, condominiums and public facilities even in the event of a water outage. Since the structure is a water tank facility using a pressurized water supply system and a receiving tank / elevated tank system, it is a system that aims to level up the management level of the installer. In order to increase the number of water supply days, evacuation shelters are able to secure the amount of water that can be stored up to the upper limit of the water level in the storage tank in a situation where a water outage is predicted. (At the time of the Chuetsu-oki earthquake, paging broadcasts entered and recommended that water be stored in the bathtub 30 minutes later.) On the other hand, the school facilities that serve as evacuation shelters were designed with the amount of water stored according to the plan. There is a situation in which a design change is desired due to the recent decrease in population. Even if the design is changed, a large amount of costs are incurred. For this reason, the water volume of the existing water tank is controlled more finely, and the drinking water is supplied safely and securely while ensuring the optimal water volume. It is hoped that.

  Tap water needs to maintain a residual chlorine concentration of 0.1 mg / L or more. Concentration management is required to maintain the same quality at the faucet. For this reason, the Waterworks Bureau supplies a concentration that takes into account residual chlorine. However, since the concentration of residual chlorine consumed decreases when it is supplied to the water storage tank, there are some places where the concentration is controlled by a residual chlorine injector to maintain the quality. The present invention proposes the circulation efficiency of the amount of water retained in the water tank, and does not hold excess stored water. As a means, the amount of water used in the day of the month, the current storage amount display (water receiving tank / elevated tank), and even when the water temperature rises, the water circulation of the best water volume is improved and the quality control close to directly connected tap water is provided. is there.

  On the other hand, the water tank water supply is also a water tank that supplies drinking water to local residents and supplies it to a fire fighting water tank in the event of a natural disaster such as a major earthquake or a fire. For this purpose, it is necessary to fill the water storage capacity based on the necessary lower limit management. It is also important to avoid damage caused by sloshing of the water tank during a disaster. As described above, there is a need to meet the trade-off requirement that it is preferable to provide almost full water when natural disasters occur due to safe water storage management.

  Conventionally, a technique for managing the amount of water in a water storage tank has been proposed. For example, in Japanese Patent Application Laid-Open No. 2013-185434 (Patent Document 1), it is connected to a water pipe at normal time and can be detached and carried in an emergency. A water storage tank is described that prevents bacterial growth in the water storage tank. Japanese Patent Laid-Open No. 2008-14375 (Patent Document 2) describes that a water circulation cycle is constructed using a tank provided on a building roof to stop the heat island phenomenon and global warming. .

Furthermore, International Publication 2011/126127 Pamphlet (Patent Document 3) describes a sprinkler device that uses the initial fire extinguishing capability and tap water efficiently, and has a variety of drinking water and installation space.

  However, the above prior art does not solve the problem of maximizing the water supply capability in the event of an emergency while reducing waste during normal times in relation to water storage in the water storage tank.

JP 2013-185434 A JP 2008-14375 A International Publication 2011/126127 Pamphlet

  The present invention has been made in view of the prior art of water storage technology, and drinking to the public in an emergency while reducing as much as possible the labor and waste of maintenance of drinking water stored in a water tank as much as possible. The problem to be solved is to provide on-demand water volume control technology that enables water supply.

The water storage system of the present invention is
A water storage system for supplying drinking water to a building,
Water storage means for storing potable water;
Control means for maintaining the water level of the water storage means at a predetermined level below a full water level;
Emergency prediction means for operating the control device so as to predict the occurrence of a disaster and inject potable water to a full water level exceeding the predetermined level.

The water storage system of the present invention comprises primary water supply control means for controlling injection of potable water into the water storage means,
Flow rate measuring means for measuring the flow rate of potable water injected into the water storage means;
Emergency shut-off means that is closed so that drinking water in the water tank is not supplied in the event of a disaster,
When the control means detects a signal from the emergency prediction means, it closes the emergency shut-off means and can start open control of the primary water supply means.

  When the control means determines that no disaster occurs regardless of the signal of the emergency prediction means, the control means maintains the water level of the water storage means at the predetermined level below the full water level, while the signal of the emergency prediction means If it is later determined that a disaster has occurred, the water level of the water storage means is changed to a full water level and water injection is performed.

  According to the present invention, on-demand water volume control technology that enables the supply of drinking water to the public in an emergency while reducing the labor and waste of drinking water stored in the water tank during normal times as much as possible. Can be provided.

The figure which shows schematic embodiment of the water storage system of this embodiment. The figure which is 2nd Embodiment of the water storage system of this embodiment, and shows embodiment using what is called an elevated water storage tank. The figure which shows the water storage amount control mechanism in the ground installation type water storage tank of this embodiment. The figure which shows embodiment of the other water storage amount control mechanism of this embodiment. The figure which shows the water storage amount control mechanism in the elevated installation type water storage tank of this embodiment. The figure which shows the other storage amount control mechanism in the elevated installation type water storage tank of this embodiment. Schematic which showed the internal structure of the control panel 308 used for this embodiment. The flowchart of the water storage amount control method of this embodiment. The flowchart of the emergency control method of the water storage amount in this embodiment.

  Hereinafter, although this invention is demonstrated with embodiment, this invention is not limited to embodiment mentioned later. FIG. 1 shows a schematic embodiment of the water storage system of the present embodiment. The water storage system shown in FIG. 1 includes a water storage tank 100 installed on the ground, and drinking water in the water storage tank 100 is transferred from the water storage tank 100 to a pump (not shown) in each level 101 of the building. To 108. In buildings, cooking and washing are performed using the supplied drinking water.

  The drinking water shown in FIG. 1 is supplied with drinking water from the primary water supply pipe, and the water level in the water storage tank 100 is maintained at a level set corresponding to the required amount of water. For example, the water level to be set can be set as appropriate according to the required amount of water, and as a guideline, the water level should be set so that at least the drinking water in the water storage tank 100 is circulated per day. Can do. In addition to this, other standards corresponding to the estimation standard of the required water amount can be used.

  FIG. 2 is a second embodiment of the water storage system of the present embodiment, which is an embodiment using a so-called elevated storage tank. In the embodiment of FIG. 2, drinking water is sent to the water storage tank 200 from the primary water supply pipe to the elevated water storage tank 200. The potable water accumulated in the elevated storage tank 200 supplies the drinking water from the water supply pipes installed on the lower side of the elevated storage tank 200 to each of the floors 101 to 108. The amount of water stored in the elevated water tank 200 is also configured so as to be appropriately set according to the required amount of water.

  As described above, the water storage system of the present embodiment controls the amount of water stored in the range of the optimal amount of water required for supplying drinking water during normal times. On the other hand, in the event of a disaster such as a major earthquake, it is necessary to supply drinking water and fire prevention water to local residents. In particular, water tanks that supply drinking water to schools, condominiums, commercial facilities, etc. can store drinking water up to the standard full water level in the event of a disaster in terms of supplying drinking water to local residents and providing fire prevention water. It is preferable to keep it. The water storage system of this embodiment maximizes the water supply function at the time of a disaster by switching the water level in the water tank from the required water volume level to the full water level when a disaster occurs or when a disaster occurs.

  FIG. 3 is a diagram illustrating a water storage amount control mechanism in the ground-mounted water storage tank of the present embodiment. The water storage tank 300 is laid on the ground by using an appropriate support structure, receives drinking water from the primary water supply pipe 301, and receives drinking water in the tank via the flow meter 302 and the primary water supply control valve 303. Have been supplied. In the illustrated embodiment, the amount of stored water can be controlled at a predetermined water level between the low water level 304 and the high water level 305.

  The high water level 305 corresponds to the full water level determined by the standard of the water tank 300. The drinking water supplied exceeding the full water level is discharged from the overflow pipe 307 to the ground or the sewer pipe. In the embodiment shown in FIG. 3, the water level in the water storage tank 300 is detected by a float type water level gauge 306. The water level signal of the water level gauge 306 is sent to a control panel 308, which will be described later, and used for water control. Furthermore, a drain valve 311 is installed at the lower part of the water tank 300 so that the water stored in the water tank 300 can be discharged to store the water tank 300 for repair or the like.

  3 further includes a control panel 308, an emergency shut-off valve 309, and a pumping pump 310. The control panel 308 receives signals from the flow meter 302 and the water level meter 306, and performs primary operation. The opening and closing of the water supply control valve 303 is controlled so that the amount of stored water is stabilized at a set level. Further, the control panel 308 controls the operation of the emergency shut-off valve 309 and the pumping pump 310. In an emergency such as a disaster, the control panel 308 stops the supply and drainage of drinking water to ensure the amount of water storage, and to the building during normal times. Supply potable water. For example, the emergency shut-off valve 309 may not be disposed in the existing water storage tank 300, but the present invention is also applicable to a water tank that does not include the emergency shut-off valve 309. The water temperature in the water storage tank 300 is monitored by a water temperature gauge 314, and chlorine concentration control corresponding to the water temperature is possible.

  As another embodiment of the present embodiment, a wireless communication means is provided in the water level meter 306, so that the water level can be confirmed by an application of a smart phone or the like even when the power is cut off during a disaster. . Note that the drain valve can also function as an emergency safety valve in order to measure the flow rate of the flow meter 302 and prevent the water storage tank 300 from excessive water storage or damage to the piping.

  Instead of the emergency shut-off valve 309, it is possible to provide a function of stopping the pump when the seismic intensity is full. In addition, after the seismic intensity is detected, if the amount of water used is significantly different from the amount of water used in the month, day, and time, a water leakage prevention function can be provided by automatically stopping the water supply operation.

  FIG. 4 shows an embodiment of the water storage amount control mechanism of the third embodiment of the present embodiment. In addition, in embodiment shown in FIG. 4, it shows as embodiment which is not equipped with an emergency cutoff valve. In the embodiment shown in FIG. 4, instead of the water level gauge 306, a water pressure gauge 312 is connected upstream of the drain valve 311, and the amount of potable water stored in the water storage tank 300 is detected by water pressure. ing. The detected water level signal is sent to the control panel 308 in the same manner as in the embodiment of FIG. 3, and is fed back to control of the water storage amount.

  FIG. 5 shows an embodiment of a water tank 300 configured as a so-called elevated water tank installed on the rooftop of the building of the present embodiment. The water tank 300 is installed on the roof 500 of the building 500, and drinking water from a water supply pump (not shown) is supplied to the water tank 300. In the embodiment of FIG. 5, the water level in the water tank 300 is configured to detect the water level in the water tank 300 by a float-type water level meter 306.

  The water level signal of the water level gauge 306 is sent to the control panel 308 via a line, and the amount of stored water is controlled to a predetermined water level between the high water level 305 and the low water level 304 according to the present embodiment. . In addition, each level is supplied to each level via a water supply pipe and a control valve disposed near the bottom of the water storage tank 300. The other configuration shown in FIG. 5 is the same as that described with reference to FIG. 3 and FIG.

  FIG. 6 is another embodiment of a water tank 300 installed on a roof 600 of a building with an elevated water tank configuration. The embodiment of FIG. 6 is generally the same as the embodiment of FIG. 5, but, as described in FIG. 4, the water level in the water tank 300 is detected by the water pressure gauge 312 and sent to the control panel 308 via the line. And sent.

  As described above, the water storage system of the present embodiment can be applied as a low water tank configuration or a high water tank.

  FIG. 7 is a schematic diagram showing the internal configuration of the control panel 308 used in the present embodiment. Inside the control panel 308, a control device 400, an input interface 401, and an output interface 405 are arranged. The input interface 401 receives a water level signal from the primary water supply control valve 303, the emergency shutoff valve 309 (when the water storage system includes an emergency shutoff valve), the water level gauge 306, or the water pressure gauge 312, and passes through the input interface 401. Thus, each signal is sent to the control device 400 so that the control device 400 can control the amount of water stored.

  The control device 400 can be configured to include a CPU (central control device), and executes water level control of the present embodiment by appropriately executing a program such as an assembler or C language. The water level control as a result of processing performed by the control device 400 using various input signals is output to the primary water supply control valve 303, the emergency shutoff valve 309, and other control outputs via the output interface 405. It operates according to the control to achieve the target water level.

  The control panel 308 further includes a sensor 402. As the sensor 402, for example, a sensor device such as an acceleration sensor or a temperature sensor or a receiving device that detects an earthquake early warning can be used. In the present embodiment, these means are collectively referred to as an emergency prediction means. In addition, the sensor can be a fire alarm, a combination of a fire alarm and a temperature sensor, and in the case of a combination of a fire alarm and a temperature sensor, it can be a sensor connected to each room of the building. it can.

  When the emergency prediction unit detects a large earthquake by S wave vibration (initial fine movement) or the like, the control device 400 stops the operation of the pumping pump 310. Then, the primary water supply control valve 303 is released so that water can be injected from the primary water supply pipe at the maximum flow rate, and water is injected into the water storage tank 300. The detection of a large earthquake can be performed by appropriately combining detection of initial tremor, determination of acceleration due to main shock from detection of initial tremor, determination of acceleration due to main shock from reception of emergency earthquake bulletin, and the like.

  When the emergency prediction means is a fire alarm, after detecting the start of operation of the fire alarm, if the temperature sensor detects a high temperature after a predetermined time, it is determined that a fire has occurred and water is poured into the water tank 300. At the same time, the start of the operation of the sprinkler can be instructed. In addition, when the temperature sensor does not detect a high temperature even though the start of the operation of the fire alarm is detected, water injection into the water storage tank 300 is stopped and the normal water level control is resumed as no fire has occurred. In this case, if the fire alarm is activated again and the temperature sensor detects a high temperature, the water level has already been maintained higher than the normal level due to the previous activation, so that sufficient water supply is possible and emergency water injection is performed at the same time. As a result, it is possible to respond more quickly to disasters.

  As a preferred emergency water supply method, the magnitude of the mainshock acceleration is judged from detection of initial tremor or reception of an earthquake early warning. Based on this determination, for example, by detecting initial tremor or receiving an earthquake early warning, the emergency shut-off valve 309 is closed and the pumping pump is stopped, and at the same time, the primary water supply control valve 303 is opened and the acceleration of the main shock is determined. It is preferable to employ a method for controlling the opening operation of the primary water supply control valve 303.

  According to this method, the opening control of the primary water supply control valve 303 can be started prior to the arrival of the earthquake, so that the supply of drinking water can be started without delay, and then the mainshock vibration arrives and the seismic acceleration exceeds the set value. If it is small, the primary water supply control valve 303 is stopped from opening and then switched to the closing operation, so that it is possible to sufficiently cope with a disaster without a large fluctuation in the amount of stored water. In addition, when turbidity is confirmed in drinking water, measures, such as supplying water via a simple filter, can be provided easily.

  Moreover, when the earthquake acceleration at the time of the arrival of the main shock is larger than the set value, the opening operation of the primary water supply control valve 303 is maintained until the full water level is detected without stopping the opening operation of the primary water supply control valve 303. When the full water level is detected, the primary water supply control valve 303 is controlled to close. This control makes it possible to quickly increase the drinking water supply capacity to the public as soon as possible after a disaster is detected. Furthermore, since the water level in the water tank 300 is much lower than the full water level when the ground motion of the main shock is started, the adverse effect of sloshing of water in the water tank 300 due to the main shock vibration can be suppressed. It is possible to prevent the storage tank from collapsing.

  In another embodiment, the control panel 308 can be configured to include a backup power supply control unit 403. The backup power supply control unit 403 controls the operation of the backup power supply 404 such as a lithium ion secondary battery array or an emergency generator, and controls the power supply path from the commercial power supply to the backup power supply. In this embodiment, even when power is supplied from commercial power due to the mainshock vibration, it is possible to provide the maximum drinking water supply capacity in the event of a disaster, and in addition, the smartphone app currently holds the current status in response to commands from the smartphone. The amount can be confirmed and remote control is possible.

  Sprinklers and fire pumps are also supplied from the water tank as fire extinguishing water, but if the supply source is via the water tank water supply, depending on the amount of water stored, the amount of water that can be extinguished for 10 minutes or more is secured be able to. In the event of a disaster, it is maintained at a high water level, so it can respond quickly. Furthermore, even if it is other than a fire, it may be possible to supply boiler water and cooling tower water to support the water supply of the entire building. Various data can be stored in the nonvolatile memory of the control device 400. Furthermore, a display panel can be provided on the on-site control panel 308 to display the amount of retained water, the number of revolutions, etc. stored in the nonvolatile memory. In this embodiment, it is possible to provide information on the amount of water held by a school serving as an evacuation center with a backup power source even when water is interrupted. It can also be applied to buildings that are open to the public.

  FIG. 8 is a flowchart of the water storage amount control method of the present embodiment. The process starts from step S800, and in step S801, the amount of water in the reservoir (which is equivalent to the water level in the same reservoir) is checked. In step S802, it is determined whether the stored water is equal to or higher than the lower limit and the set high level. If the determination in step S802 is positive (yes), the target water level is maintained by performing a water supply process corresponding to the request, and the process returns to step S801.

  On the other hand, if the determination in step S <b> 802 is negative (no), the primary water supply control valve 303 is opened in step S <b> 804, and drinking water is injected into the water storage tank 300. If it is determined in step S805 that the water level of the stored water has reached the reference high level (yes), the process returns to step S801 to manage the amount of water in the water tank. On the other hand, if it is determined in step S805 that the set high level has not been reached (no), the process returns to step S804, and drinking water is injected into the water tank 300 until the water level reaches the set high level. Secure the desired amount of water storage.

  FIG. 9 is a flowchart of the method for emergency control of the water storage amount in the present embodiment. As shown in FIG. The process of FIG. 9 starts from step S900, and a normal water level control process is executed in step S901. In step S902, it is determined whether an alarm signal from the emergency sensor is detected. When an alarm signal is not detected (no), a normal water supply process is performed in step S903, the process returns to step S901, and a normal water level control is performed.

  On the other hand, if it is determined in step S902 that an alarm signal has been detected (yes), the process branches to step 704, the emergency shut-off valve 309 is closed in step S904, and the opening operation of the primary water supply control valve 303 is started. Thereafter, in step S905, it is determined whether or not the main shock acceleration is equal to or higher than the threshold value. In step S906, water is poured until a full water level is reached. If it is determined in step S906 that the full water level has been reached (yes), the emergency control method is terminated in step S906, and the water supply capacity to the public is maximized. If the alarm is a fire alarm, the sprinkler may be forcibly activated.

  At this time, the determination that the full water level has been reached can use the signal from the water level gauge 306 or the signal from the water pressure gauge 312. In addition, it can be determined by integrating the values of the flow meter 302 and estimating using the accumulated water supply amount. In the process of step S904, after the alarm signal is detected, if the main shock acceleration is less than the threshold value in step S905, or if the alarm signal is generated by the fire alarm and the temperature sensor does not detect a high temperature after a predetermined time. (No), the emergency shut-off valve 309 is opened, and the primary water supply control valve 303 is closed.

  Thereafter, the normal water level control in step S901 is resumed. By adopting this process, if the alarm signal is a false alarm or the earthquake scale is smaller than the estimated value, you can immediately return to normal water level control without performing resetting work, etc. Can be saved.

  In addition, an elevated chlorine concentration control system can be incorporated in the water storage system of the present embodiment, and an appropriate chlorine concentration may be provided according to the season, water temperature, circulation amount, and the like. Further, when the water tank rotation rate is low, the chlorine injector can be automatically operated. Furthermore, the chlorine concentration can also be confirmed and controlled by application in a smartphone.

  As described above, according to the present invention, a water volume on-demand water storage system and a water volume control method capable of providing the maximum potable water supply capacity in an emergency while responding to the required amount of drinking water during normal times. Can be provided.

100: Water tank 101: Hierarchy 200: Water tank (elevated water tank)
300: Reservoir 301: Primary water supply pipe 302: Flow meter (pulse signal): Flow meter 303: Primary water supply control valve 304: Low water level 305: High water level (full water level)
306: Water level gauge 307: Overflow pipe 308: Control panel 309: Emergency shut-off valve 310: Pump pump 311: Drain valve 312: Water pressure gauge 314: Water temperature gauge 400: Control device 401: Input interface 402: Sensor 403: Backup power supply control unit 404: Backup power source 405: Output interface 406: Water temperature gauge

Claims (3)

A water storage system for supplying drinking water to a building,
And a water storage tank for water storage of drinking water,
A primary water supply control valve for controlling the injection into the reservoir of drinking water,
An emergency shut-off valve that is closed to prevent drinking water from being stored in the reservoir in the event of a disaster;
A control device for maintaining the water level of the water tank below a full water level and at a required amount of water at least enough to circulate the drinking water in the water tank per day in the building ; to predict the occurrence of a disaster, the drinking water, and a control panel provided with an emergency prediction means for operating the control device to inject to a full water level above the required amount of water,
When the control device detects a signal from the emergency prediction means, it starts opening control of the primary water supply control valve , and when it is determined that a disaster has occurred after the signal from the emergency prediction means, the water level of the water storage tank is filled. A water storage system that changes to a level and maintains the water level of the water storage means at the required water amount equal to or lower than the full water level when it is determined that no disaster occurs regardless of the signal of the emergency prediction means . Further comprising a flow measurement means to measure the flow rate of the drinking water to be injected into the reservoir, the reservoir system according to claim 1. A water storage control method for a water storage system for storing potable water,
Maintaining the water level of the water storage tank for storing drinking water at a level equal to or lower than a full water level and at least a required amount of water for circulating the water in the water storage tank at least one day in the building ;
By predicting the occurrence of a disaster by receiving a signal from the emergency prediction means provided in the control panel and starting the opening operation of a primary water supply control valve for injecting drinking water into the water tank , the drinking water is supplied to the required amount of water. Operating the controller to inject to a full water level above
If it is determined that a disaster has occurred after the signal of the emergency prediction means, the step of changing the water level of the water storage tank to a full water level and continuing to inject drinking water;
And a return to control for maintaining the water level of the water tank at the required water amount equal to or lower than the full water level when it is determined that no disaster will occur despite the occurrence of a disaster.