JPH08136528A - Measuring apparatus of amount of used water for water quality monitor - Google Patents

Abstract

PURPOSE: To measure the flow rate accurately for a long term through a simple structure at low cost. CONSTITUTION: In a water quality monitor where piping 2, 4, 6 are provided with a residual chlorine meter 5, a pH meter and a turbidity tintometer 3, etc., a water storage tank 9 is disposed at a position appropriate for the pipings 2, 4, 6. Furthermore, a water level detector 10 for detecting the water level in the water storage tank 9 reaching a predetermined upper limit is provided and a solenoid ON/OFF valve 11 is disposed closely to the water storage tank 9 in the downstream thereof. The solenoid ON/OFF valve 11 is closed at a constant or arbitray interval and the time, elapsed after closure of the valve 11 before detection of the liquid level through the water level detector 10, is compared with a predetermined reference time. If the elapsed time is longer than the reference time, an alarm signal is delivered from a controller 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water quality monitoring device for monitoring the water quality by measuring the amount of residual chlorine, pH, turbidity, chromaticity, etc. in tap water, for example. The present invention relates to a used water amount measuring device for measuring whether or not there is water.

[0002]

2. Description of the Related Art For example, in order to monitor the water quality of tap water, a water quality monitoring device consisting of a residual chlorine meter, a pH meter, a turbidity color meter, etc. is provided in a pipe connected to a main water supply pipe, 100 ml / min to 350 m of tap water sample water
It has been performed to measure the residual chlorine amount, pH value, turbidity, chromaticity, etc. in the sample water by circulating it at a low flow rate of about 1 / min. When the flow rate of the sample water is accumulated and decreases, the amount of residual chlorine in the sample water may change and the water quality data measured by the water quality monitoring device may be abnormal.

Therefore, conventionally, it has been practiced to use a float type flow meter to measure whether or not the amount of water required for water quality monitoring flows through the pipe.

[0004]

The above-mentioned float type flow meter has an advantage that the structure is simple and inexpensive, but the accuracy is deteriorated due to the adherence of scale to the inside of the flow meter or the float in a relatively short period of time. , It becomes difficult to measure the flow rate accurately. Therefore, in order to prevent the deterioration of the accuracy, it is necessary to regularly clean the inside of the pipe once every three months and to adjust the flow rate, which is troublesome and time-consuming for maintenance and inspection.

It is also conceivable to use an electromagnetic flow meter with a small flow rate and high accuracy, but this has the drawback that it is expensive and causes measurement errors due to aging. The present invention has been made in view of the above-mentioned drawbacks, and an object of the present invention is to provide a water consumption measuring device in a water quality monitoring device which has a simple structure and is inexpensive, and which can accurately measure a flow rate over a long period of time.

[0006]

In order to achieve the above object, the present invention is a water quality monitoring device in which a pipe is provided with a residual chlorine meter, a pH meter, a turbidity color meter, etc. And a water level detector for detecting that the water level in the water tank has reached a predetermined upper limit water level, and an on-off valve on the downstream side of the pipe near the water tank. Closed at regular intervals or at any time,
The time from the closing time until the water surface detector detects the water surface is measured, the measured time is compared and calculated with a predetermined reference time, and when the measured time is longer than the reference time, a warning signal is issued. It is characterized in that a control device for outputting is provided.

[0007]

In the above structure, when the sample water normally flows in the pipe, the sample water is stored in the water tank from the time when the on-off valve is closed, and it is detected that the water surface has reached the predetermined upper limit water level. The time up to the time when the detector detects it is measured in advance, and the reference time is stored in the memory of the control device based on the measured time.

During operation of the water quality monitoring device, the control device keeps the on-off valve fixed or at regular intervals while the on-off valve is always open to prevent the sample water from accumulating in the water tank. Closed, measuring the time from the time of closing to the time of detecting the water surface by the water surface detector, comparing and calculating the measured time and the reference time, and if the measured time is longer than the reference time, A warning signal is output from the control device to the monitoring room via a telemeter or the like.

Even if the water quality data measured by the water quality monitoring device is abnormal when the warning signal is received,
It can be determined that this is because foreign matter, bubbles, and the like are accumulated in the pipe and the flow rate is reduced.

When the warning signal is received as described above, foreign matter and bubbles may be removed by cleaning the inside of the pipe to secure a predetermined flow rate. As a result, the original normal state can be restored again.

In this case, the main part of the water consumption measuring device is composed of a water tank, a water surface detector and an opening / closing valve, which has a simple structure, is hard to break down and is inexpensive to manufacture. Moreover, since the measurement error caused by the inside of the water storage tank being soiled with water stains is slight, the flow rate can be accurately measured over a long period of time.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a water quality monitoring device provided with a water consumption measuring device 1 according to an embodiment of the present invention. The water quality monitoring device is a first water quality monitoring device connected to a main for water supply (not shown). A turbidity colorimeter 3 provided in the pipe 2, and a residual chlorine meter 5 provided in a second pipe 4 having both ends connected to the first pipe 2,
The pH meter 7 is provided in the third pipe 6 whose both ends are connected to the second pipe 4, and the water consumption measuring device 1 is provided in the first pipe 2 and the second pipe 4, respectively. .

As shown in FIG. 2, the water consumption measuring device 1 has a water tank 9 installed in pipes 2 and 4, and an electrode 10a is hung in the water tank 9 to suspend the water level in the water tank 9. W. A water surface detector 10 for detecting that L has reached a predetermined upper limit water level HL, an electromagnetic on-off valve 11 provided on the downstream side near the water tank 9 of the pipes 2 and 4, and an on-off control of the electromagnetic on-off valve 11. At the same time, the control device 1 including a microcomputer that receives a detection signal from the water surface detector 10 and outputs a warning signal
2 is provided.

According to the above construction, the main parts of the water consumption measuring device 1 are the water tank 9, the water surface detector 10 and the electromagnetic on-off valve 11.
It has a simple structure, is hard to break down, and is cheap to manufacture. Moreover, even if the inside of the water tank is contaminated with scale, the measurement error caused by it is insignificant, and the flow rate can be accurately measured for a long time. be able to.

As shown in FIG. 1, a manual opening / closing valve 14, a pressure reducing valve 15 and an electric shutoff valve 16 are provided on the upstream end side of the first pipe 2, and a manual opening / closing valve 17 is provided on the downstream side of the first pipe 2. Further, an electromagnetic opening / closing valve 18 is provided on the downstream side of the third pipe 6 upstream end side connection portion of the second pipe 4, and an electromagnetic three-way switching valve 19 is provided on the downstream end side of the third pipe 6. The electromagnetic three-way switching valve 19 and the first pipe 2 are connected by a drain pipe 20.

The procedure for measuring the amount of water used will be described based on the above configuration. Each valve 11.14, 15, 16, 17 is opened, the electromagnetic opening / closing valve 18 is closed, and the electromagnetic three-way switching valve 19 is switched. With the drain pipe 20 closed, the sample water is stored in the water storage tank 9 from the closing point of the electromagnetic opening / closing valve 11 when the sample water normally flows through the pipes 2, 4, and 6, and the water surface W ． The time until the time when the water surface detector 10 detects that L has reached the predetermined upper limit water level HL in contact with the electrode 10a is measured in advance, and the reference time t is stored in the memory of the controller 12 based on the measured time. I will let you.

During operation of the water quality monitoring device, the electromagnetic on-off valve 11 is kept constant by the control device 12 in a state where the electromagnetic on-off valve 11 is always opened to prevent water from accumulating in the water tank 9. Or, it is closed every arbitrary period, the time from the closing to the time when the water surface is detected by the water surface detector 10 is measured, and the amount of water used Q is measured by the following formula by the measured time T and the volume V of the water tank. .

When Q = V / T Q is smaller than the minimum permissible water quantity q, or the reference time t
If it does not reach HL even if, the warning signal is output.

Even if the water quality data measured by the water quality monitoring device is abnormal when the above warning signal is received,
It can be judged that this is because foreign matter, bubbles, etc. are accumulated in the pipes 2, 4 and the flow rate is reduced, and by cleaning the inside of the pipes 2, 4 to remove foreign substances and bubbles. , Can be returned to its original normal state.

When the measured water amount Q is larger than the allowable minimum water amount q (Q> q), it is considered that the water amount necessary for water quality monitoring is flowing through the pipes 2, 4 and 6.
No warning signal is output from the control device 12 to the monitoring room.
In this state, if there is an abnormality in the water quality data measured by the water quality monitoring device, the water quality data is correct,
It can be judged that the water quality is abnormal.

[0021]

According to the present invention, the main part of the water consumption measuring device is composed of the water tank, the water surface detector and the on-off valve, and the structure is simple, it is hard to break down, and the manufacturing cost is low. Moreover, since the measurement error due to the inside of the water storage tank being soiled with water stains is slight, the flow rate can be accurately measured over a long period of time.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of a water quality monitoring device equipped with a water usage measuring device according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of the same water consumption measuring device.

[Explanation of symbols]

 1 Water consumption measuring device 2 First piping 3 Turbidity colorimeter 4 Second piping 5 Residual chlorine meter 7 pH meter / conductivity meter 9 Water tank 10 Water level detector 11 Electromagnetic on-off valve 12 Control device T Measuring time t Reference time

Claims (1)

[Claims] 1. A water quality monitoring device having a pipe provided with a residual chlorine meter, a pH meter, a turbidity colorimeter, and the like, wherein a water tank is provided at an appropriate position of the pipe, and the water level in the water tank is set to a predetermined level. A water level detector for detecting that the upper limit water level has been reached is provided, and an on-off valve is provided on the downstream side near the water tank of the pipe, and the on-off valve is closed at regular or arbitrary intervals,
The time from the closing time until the water surface detector detects the water surface is measured, the measured time is compared and calculated with a predetermined reference time, and when the measured time is longer than the reference time, a warning signal is issued. A water consumption measuring device in a water quality monitoring device, which is provided with a control device for outputting.