JP3612491B2 - Automatic water intake control system for raw water supply - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention automatically determines the water quality, which is one of water intake management in waterworks facilities, and stops taking water when it deviates from a predetermined water quality standard, and takes water when the water quality standard reaches a conforming value. The present invention relates to an automatic intake control device for water supply raw water that is resumed.
[0002]
[Prior art]
As shown in FIG. 3, the schematic configuration of the water supply facility is composed of a water intake facility 1, a receiving well 2, a filtration basin 3, a water purification basin 4, and a water distribution facility 5. In FIG. 3, a water intake facility 1 takes raw water of water supply from a river and introduces it into a landing well 2. The introduced water is rectified in the landing well 2 and then supplied to the filtration basin 3. The clean water filtered in the filtration basin 3 is stored in the clean water basin 4 after chemical sterilization and then sent to the water distribution facility 5 to be distributed to consumers.
[0003]
[Problems to be solved by the invention]
Intake management at the water supply facility shown in FIG. 3 usually involves taking raw water from a river or the like with the intake equipment 1 and then measuring the quality of the raw water to determine whether the water quality standard has reached a predetermined conformity value. Is going by. For this reason, if the raw water is not turbid, no problem occurs. However, if the raw water is turbid, the following problems may occur. This is because means for measuring the quality of raw water in the water facility 1 is taken. For example, means for measuring the turbidity of the sample after taking out the sample water before the water quality measurement result becomes clear. This is because it takes a lot of time to determine the measurement result.
[0004]
Due to this time consuming, that is, due to the time difference, the muddy water of the river flows into the intake facility 1, the landing well 2, and the filtration basin 3. There is a risk of serious accidents such as water loss. In addition, when muddy water is introduced into the landing well 2, first, the intake of muddy water must be stopped, and then all the water in the landing well 2 must be discharged, and then the raw water without turbidity must be newly introduced. There is a problem that a great deal of labor and time are required for the recovery work of the receiving well 2 of the water.
[0005]
Furthermore, when Cryptosporidium has been detected in the water quality measurement at the time of water intake in recent years, there has been a conventional measure that must immediately limit water intake to eliminate inflow water intake and prevent the spread of contamination to the subsequent water purification function. It was not done.
[0006]
This invention has been made in view of the above circumstances, and if the water quality measurement is automatically performed and deviates from the predetermined water quality standard, the supply of raw water to the facilities after the landing well is immediately stopped, and the water quality standard is set. Drain the unsatisfied raw water so as not to adversely affect the facilities after the landing wells, and if the water quality standard reaches the conforming value, restart the intake of the raw water to minimize the occurrence of water outage etc. An object of the present invention is to provide an automatic water intake control device for raw water supply .
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is an unprecedented device that is installed in the middle of a water conduit and has a preventive countermeasure function that plays an important role as a simple device. .
[0009]
The first invention includes a water source intake facility, a receiving well into which raw water taken from the intake facility is introduced via a raw water introduction pipe, and a filtration pond that rectifies and supplies the raw water introduced into the landing well. In a water supply facility equipped with a clean water pond that stores clean water filtered through this filter pond after chemical sterilization and a water distribution facility that distributes the water stored in this clean water pond to consumers,
Inserted into the raw water introduction pipe connecting the water source intake facility and the landing well, and inserting the raw water introduction pipe from the bottom to a certain position, and at the top, a primary water tank provided with an air vent ,
A secondary aquarium juxtaposed to the primary aquarium and connected via a connecting line;
A water quality measuring instrument that is inserted into this secondary water tank and measures the turbidity of raw water in the tank,
A first motor-operated valve that is inserted in the middle of a pipeline that supplies the raw water of the secondary water tank to the landing well, and is normally open;
A second electrically operated valve that is commonly connected to a pipe connected to a drain outlet of the primary and secondary water tanks, inserted into the common pipe, and normally closed;
A water quality measurement signal is supplied from the water quality measurement device, and a water quality monitoring unit that determines whether or not the measurement signal conforms to a water quality standard; and
When it is determined that the turbidity monitored by the water quality monitoring unit does not conform to the water quality standard, a control signal for closing the first motor-operated valve and opening the second motor-operated valve is applied to both motor-operated valves. And a motor-operated valve control signal sending section for opening the first motor-operated valve and closing the second motor-operated valve when the turbidity meets the standard, and for supplying a control signal to both motor-operated valves. It is what.
[0011]
In the second aspect of the present invention , electric valves are provided for the pipes connected to the drains of the primary and secondary water tanks, respectively, and these electric valves are controlled by a control signal from the electric valve control signal sending unit. It is characterized by this.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration explanatory view showing an embodiment of the present invention. In FIG. 1, 11 is a treated water tank serving as a primary water tank, and 12 is a measuring water tank serving as a secondary water tank. The treatment water tank 11 and the measurement water tank 12 are made of stainless steel cylinders. Both the water tanks 11 and 12 are arranged side by side with a predetermined interval therebetween, and both the water tanks 11 and 12 are communicated with each other through a connecting pipe 13.
[0013]
The raw water introduction pipe line 14 is inserted from the bottom of the treated water tank 11 until the end of the treated water tank 11 is near the upper part in the treated water tank 11. By inserting the raw water introduction pipe line 14 into the treated water tank 11 in this way, impurities such as mud are accumulated at the bottom of the treated water tank 11 so that impurities do not enter the measuring water tank 12 as much as possible.
[0014]
As described above, since the raw water introduction conduit 14 is not directly supplied to the receiving well 2, it is supplied to the water intake facility 1 shown in FIG. It becomes unnecessary to take in the landing well 2.
[0015]
An air vent valve 15 is provided in the upper part of the treated water tank 11, and a drainage drainage pipe 16 is provided in the lower part of the treated water tank 11.
[0016]
The raw water introduced into the treated water tank 11 is supplied to the measurement water tank 12 via the connecting pipe 13. In the measurement water tank 12, a water quality measuring device 17 is provided. The water quality measurement value detected by the water quality measuring device 17 is converted into an electrical signal and supplied to the water quality monitoring panel 19 via the dedicated cable 18. The water quality measurement value supplied to the water quality monitoring board 19 is compared with the water quality reference value, and when the water quality reference value is deviated, a water quality monitoring signal is supplied to the electric valve control board 20. When the water quality monitoring signal from the water quality monitoring panel 19 is supplied, the motorized valve control panel 20 gives a control signal to the motorized valve described later to control the valve.
[0017]
An outflow pipe 21 for supplying treated water to the landing well 2 shown in FIG. 2 is provided in the upper part of the measurement water tank 12, and a first electric valve 22 serving as an outflow electric valve is provided in the middle of the outflow pipe 21. Is inserted. In addition, one end of a drainage conduit 23 is attached to the bottom of the measurement water tank 12, and the other end is connected to the drainage drainage conduit 16 in common, and then a second motor-operated valve 24 serving as a drainage motor operated valve is provided. To the drain line 25. The first and second motor-operated valves 22 and 24 are controlled to be opened and closed by a control signal from the motor-operated valve control panel 20.
[0018]
In addition, 26 and 27 are manual valves, 28 is a water inspection port, 29 is a pull box for drawing instrumentation signals and power, and the power is supplied from the pull box 29 to the water quality monitoring panel 19 and the electric valve control panel 20. Is done. Reference numeral 30 denotes an inundation warning electrode when the manhole 31 is inundated.
[0019]
Next, the operation of the above embodiment will be described. FIG. 2 is a block diagram illustrating the block diagram shown in FIG. 3 in more concrete form, and the embodiment of the present invention is installed in the manhole 31. The same parts as those in FIG. explain. As shown in FIG. 2, raw water taken from a river by a water intake facility 1 including a water collecting pipe 1 a and a water collecting tub 1 b is introduced from a raw water introduction pipe 14 into a treated water tank 11 installed in a manhole 31. The introduced raw water is supplied to the measurement water tank 12 through the connecting pipe 13. In the measurement water tank 12, for example, turbidity of raw water is measured by the water quality measuring device 17, and the measured value is converted into an electric signal and sent to the water quality monitoring panel 19. In the water quality monitoring panel 19, the sent measurement value is compared with a preset water quality reference value, and if the reference value is an appropriate value, the raw water in the measurement water tank 12 is received from the outflow pipe 21 as shown in FIG. Sent to Mizui 2.
[0020]
As described above, when there is no problem in the quality of the raw water (when the water quality is equal to or lower than the water quality reference value of the water quality monitoring panel 19), the raw water is sent to the landing well 2 as it is. However, for example, when turbidity occurs in the raw water, when the raw water enters the measurement water tank 12 and the measured value of the water quality measuring instrument 17 deviates from the water quality reference value of the water quality monitoring board 19, the water quality from the water quality monitoring board 19 is increased. A monitoring signal is sent to the electric valve control panel 20. Then, the motor-operated valve control panel 20 immediately sends a control signal for closing the first motor-operated valve 22 to close the first motor-operated valve 22 so that the muddy raw water does not flow into the landing well 2.
[0021]
As a result, a great amount of time is not spent for returning the landing well 2 and the filtration pond 3 due to the turbid raw water, and a serious accident such as water outage or water reduction is prevented. In FIG. 2, 2 a is a rectifying wall installed in the landing well 2, and 4 a is a chemical injection part installed in the water purification pond 4.
[0022]
When the first motor-operated valve 22 is closed, the second motor-operated valve 24 is opened by a control signal from the motor-operated valve control panel 20, and the turbid raw water in the treatment water tank 11 and the measurement water tank 12 and the waste water from the treatment water tank 11 are discharged. Mud is discharged from the second electric valve 24 to the outside. Then, the water quality of the raw water is measured by the water quality measuring device 17 while draining the turbid raw water in the measurement water tank 12, and when the water quality standard of the raw water returns to a conforming value, the motor-operated valve control panel 20 starts the first motor operated valve 22. Is opened, the second motor-operated valve 24 is closed, and the raw water taken again is supplied to the landing well.
[0023]
In recent years, sterilization by chlorine sterilization has no effect on Cryptosporidium contamination, so if the turbidity deviates from the water quality standard as in the above embodiment, the raw water is automatically taken. By stopping, the spread of pollution can be prevented in advance. And when pollution is lost and water quality is improved, water can be automatically taken.
[0024]
In addition, even in the case of bacteria other than Cryptosporidium, in the absence of this embodiment, a device such as a chemical treatment facility is required, and it is possible to avoid deterioration of the quality water distribution by the chemical. become.
[0025]
Furthermore, according to this embodiment, the safety of raw water is detected and monitored at an early stage, and automatic processing and restoration are appropriately performed. Therefore, safe and high-quality water can be distributed. In addition, by combining with a telemeter device, more advanced water quality monitoring and control can be performed in the central monitoring room. Moreover, it can be installed in a narrow space such as a manhole, and the use of an underground facility makes it easy to secure the site and reduce the equipment cost. Furthermore, the use of water immersion becomes possible by arranging the drive part of the electric valve on the ground.
[0026]
In the above embodiment, the treated water tank 11 and the measuring water tank 12 have a diameter of 200 mm, the raw water introduction pipe (the pipe inserted into the treated water tank) 14 and the connecting pipe 13 have a diameter of 80 mm, and the drainage drainage pipe 16 and the drainage. The conduit 23 used was 40 mm.
[0027]
【The invention's effect】
As described above, according to the present invention, if the raw water quality is automatically measured and deviated from the predetermined water quality standard, the supply of the raw water to the treatment facility after the landing well is stopped immediately, and the water quality standard In addition to eliminating raw water that does not meet the conditions so as not to adversely affect the facilities after the landing well, if the water quality standard reaches a conforming value, it immediately resumes the intake of raw water and suppresses the occurrence of water outages, etc. There are advantages that can be made. In addition, when the turbidity of the raw water deviates from the water quality standard, the intake of the raw water is stopped, so that the raw water such as turbid water can be automatically prevented from flowing into the landing wells and filtration ponds. The advantages such as eliminating the need for labor and time are great.
[Brief description of the drawings]
FIG. 1 is a schematic configuration explanatory view showing an embodiment of the present invention.
FIG. 2 is a diagram illustrating a specific configuration of a water supply facility.
FIG. 3 is a block configuration diagram showing a schematic configuration of a water supply facility.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Water intake equipment 2 ... Inlet well 11 ... Treatment water tank 12 ... Measurement water tank 13 ... Connection pipe 14 ... Raw water introduction pipe 15 ... Air vent valve 16 ... Waste water drainage pipe 17 ... Water quality measuring device 18 ... Dedicated cable 19 ... Water quality monitoring Panel 20 ... Electric valve control panel 21 ... Outflow pipe line 22 ... First electric valve 23 ... Drain pipe line 24 ... Second electric valve

Claims (2)

A water source intake facility, a receiving well where raw water taken from this intake facility is introduced via a raw water introduction pipe, a filtration basin that rectifies and supplies the raw water introduced into this receiving well, and In a water supply facility equipped with a purified water pond that stores the filtered clean water after chemical sterilization, and a water distribution facility that distributes the water stored in the purified water pond to consumers,
Inserted into the raw water introduction pipe connecting the water source intake facility and the landing well, and inserting the raw water introduction pipe from the bottom to a certain position, and at the top, a primary water tank provided with an air vent ,
A secondary aquarium juxtaposed to the primary aquarium and connected via a connecting line;
A water quality measuring instrument that is inserted into this secondary water tank and measures the turbidity of raw water in the tank,
A first motor-operated valve that is inserted in the middle of a pipeline that supplies the raw water of the secondary water tank to the landing well, and is normally open;
A second electrically operated valve that is commonly connected to a pipe connected to a drain outlet of the primary and secondary water tanks, inserted into the common pipe, and normally closed;
A water quality measurement signal is supplied from the water quality measurement device, and a water quality monitoring unit that determines whether or not the measurement signal conforms to a water quality standard; and
When it is determined that the turbidity monitored by the water quality monitoring unit does not conform to the water quality standard, a control signal for closing the first motor-operated valve and opening the second motor-operated valve is applied to both motor-operated valves. And a motor-operated valve control signal sending section for opening the first motor-operated valve and closing the second motor-operated valve when the turbidity meets the standard, and for supplying a control signal to both motor-operated valves. Automatic water intake control system for raw water. The conduits connected to the drains of the primary and secondary water tanks are each provided with a motorized valve, and the motorized valves are controlled by a control signal from a motorized valve control signal sending unit. The automatic intake control device for raw water of tap water according to claim 1 .

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