JPH07284754A - Water quality monitor device in water service - Google Patents

Abstract

PURPOSE:To prevent the penetration of abnormal turbid water into water service by rapidly detecting the generation of abnormal turbid water such as red water. CONSTITUTION:A color discrimination sensor 10 is disposed at the specific place of the inlet of a pipeline supplying sample water to water quality sensors 5, 8, 9 and, when the color discrimination, sensor 10 detects abnormal turbid water from the color of the sample water, a control part 12 changes over electromotive valves 11a, 11b to automatically change over a first state supplying the sample water to the water quality sensors 5, 8, 9 to a second state cutting off the flow of the sample water to the water quality sensors 5, 8, 9 to discharge the same to prevent the penetration of the abnormal turbid water. When the color discrimination sensor 12 judges the elimination of the abnormal turbid water, the control part 12 returns the electromotive valves 11a, 11b to a state supplying the sample water to the water quality sensors automatically.

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 water supply.

[0002]

2. Description of the Related Art A water quality monitor A as shown in FIG. 2 is used for monitoring the water quality of waterworks. The sample water supply port 1 connected to the water supply is connected to a turbidity colorimeter 5 via an inlet valve 2, a pressure reducing valve 3 and a first flowmeter 4a, and a turbidity colorimeter 5
The sample water analyzed in 1 is drained from the drain port 7a via the outlet valve 6. Also, from the pressure reducing valve 3 to the second flow meter 4
The sample water is supplied to the PH meter 8 and the residual chlorine meter 9 via b, and the analyzed sample water is discharged through the outlet valve 6 to the drain port 7
Drained from a.

[0003]

The generation of red water in the water supply pipe is rarely caused, but it is caused by a large pressure change in the water supply pipe or due to piping work or the like. When the generation of red water is predicted, the influence can be minimized by notifying the water supply user in advance or shutting off the inlet valve 2 of the water quality monitoring device. However, if it cannot be predicted, it will be detected by complaints from water users, and the damage will be great.

Specifically, since the conventional water quality monitoring device A does not have an alarm function for infiltration of red water, the abnormality of tap water is confirmed from the turbidity or chromaticity of the measured value in the turbidity colorimeter 5. is the current situation. For this reason, the red water enters the inside of the water quality monitoring device A, and the residual substance of the red water remains inside each of the measuring instruments,
There is a problem that it interferes with the subsequent water quality measurement. Therefore, conventionally, the water quality monitoring device A is conventionally washed with a large amount of labor [half a day to one day] every time red water is generated.

It is an object of the present invention to provide a water quality monitoring device for water supply which can promptly detect the occurrence of abnormal turbid water such as red water, output a red water alarm and prevent the abnormal turbid water from entering the inside. .

[0006]

A water quality monitoring apparatus according to claim 1 is provided with a color discrimination sensor for detecting abnormal turbid water from the color of the sample water at a specific location at the inlet of a pipe for supplying the sample water to the water quality sensor. , On the lower side of the specific point at the entrance of the pipeline,
A flow path switching means for opening and closing the flow path of the sample water to the water quality sensor side was provided, and a control section was provided for switching the flow path switching means from the open state to the closed state when the color discrimination sensor determined that abnormal turbid water occurred. It is characterized by

In the water quality monitoring device according to the second aspect, a color discrimination sensor for detecting abnormal turbid water from the color of the sample water is provided at a specific portion of the inlet of the pipe for supplying the water quality sensor to the water quality sensor, and the water at the inlet of the pipe is provided. A flow path switch that can be switched to a first state in which the sample water is supplied to the water quality sensor side and a second state in which the sample water is blocked from flowing to the water quality sensor side and drained below the specific location. And a control unit for switching the flow path switching unit from the first state to the second state when the color discrimination sensor determines that abnormal turbid water has occurred.

A water quality monitoring device according to a third aspect of the present invention is the second aspect.
The control unit described above switches the flow passage switching means from the first state to the second state when the color discrimination sensor determines that abnormal turbid water has occurred, and switches the flow passage when the color discrimination sensor determines that abnormal turbid water has disappeared. The means is configured to switch from the second state to the first state.

[0009]

According to the structure of the first aspect, when the color discrimination sensor detects abnormal turbid water from the color of the sample water, the control section switches the flow path switching means to supply the sample water to the water quality sensor side. Prevents inflow of abnormal turbid water by blocking the flow of sample water from the state to the water quality sensor side.

According to the second aspect of the present invention, when the color discrimination sensor detects abnormal turbid water from the color of the sample water, the controller switches the flow path switching means to supply the sample water to the water quality sensor side. The state is automatically switched to the second state in which the sample water is blocked from flowing to the water quality sensor side and drained to prevent the intrusion of abnormal turbid water.

According to the third aspect of the present invention, the flow path switching means is switched to prevent the intrusion of the abnormal turbid water, and when the color discrimination sensor determines that the abnormal turbid water is eliminated, the flow channel switching means is used to pass the sample water to the water quality sensor. Automatically returns to the state of supplying to the side of.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A water quality monitoring device of the present invention will be described below based on an embodiment shown in FIG. It should be noted that components having the same functions as those of the conventional example shown in FIG.

FIG. 1 shows a water quality monitoring device of the present invention. The sample water supply port 1 connected to the water supply has an inlet valve 2 and a pressure reducing valve 3.
And connected to the turbidity colorimeter 5 via the first flowmeter 4a,
The sample water analyzed by the turbidity colorimeter 5 is drained from the first drain port 7a via the outlet valve 6. Further, the sample water is supplied from the pressure reducing valve 3 to the PH meter 8 and the residual chlorine meter 9 via the second flow meter 4b, and the analyzed sample water is supplied to the first drain port 7a via the outlet valve 6. Drained from. Further, as a specific portion of the inlet of the water quality monitoring device A, in this embodiment, a color discrimination sensor 10 for detecting abnormal turbid water from the color of the sample water flowing through this position P is provided at a position P immediately after the inlet valve 2. There is. Further, on the lower side of the position P, first and second electrically operated valves 11a and 11b are provided as flow path switching means. Here, the first motor-operated valve 11a includes the pressure reducing valve 3
It is interposed between the second flow meters 4a and 4b. One end of the second electric valve 11b is connected to the second drain port 7b, and the other end is connected between the position P and the pressure reducing valve 3. Reference numeral 12 is a control unit, which controls the first and second signals based on the output of the color discrimination sensor 10.
The motor operated valves 11a and 11b are operated.

The controller 12 is constructed as follows.
When the color determination sensor 10 determines that the color of the sample water flowing through the position P is normal, the control unit 12 enters the first state and opens the first motor-operated valve 11a to open the second motor-operated valve. 11
Close b. In this first state, the sample water taken in from the water supply sample water supply port 1 is the first electrically operated valve 1
It is supplied to the turbidity colorimeter 5, PH meter 8 and residual chlorine meter 9 via 1a for analysis.

When the color discrimination sensor 10 determines that the sample water flowing through the position P is abnormal turbid water, the control unit 1
2 becomes the second state to close the first electric valve 11a and open the second electric valve 11b. In this second state, the sample water taken in from the water supply sample water supply port 1 is supplied to the turbidity colorimeter 5, PH meter 8, and residual chlorine meter 9 side by the first motor operated valve 11a. Then, the water is discharged from the second drain port 7b through the opened second electric valve 11b. Therefore, since the sample water of the abnormal muddy water does not flow from the pressure reducing valve 3 toward the lower side, the turbidity colorimeter 5, the PH meter 8,
Residual substances in the abnormal turbid water do not remain in the residual chlorine meter 9.

From the color of the sample water flowing through the position P, the color discriminating sensor 10 discriminates that it is abnormal turbid water, and the first electric valve 11
Even during the operation in which a is closed and the second electric valve 11b is opened, the color discrimination sensor 10 detects the color of the sample water flowing through the position P, and the color discrimination sensor 10 determines that the color of the sample water is normal. When it is determined that there is, the control unit 12 causes the first motor-operated valve 11 to operate.
a is returned from the closed state to the open state, and the second electric valve 1
1b is returned from the open state to the closed state, and normal sample water is supplied to the turbidity colorimeter 5, the PH meter 8, and the residual chlorine meter 9 to automatically return to the state of analysis.

As described above, the generation of abnormal turbid water is detected at the entrance of the water quality monitoring device, and the supply of the sample water to the turbidity colorimeter 5, PH meter 8 and residual chlorine meter 9 is rapidly shut off, and the conventional method is used. There is no need to wash each time red water occurs.

In the above embodiment, the first and second electric valves 11a and 11b are provided as the flow path switching means, and the control unit 12 opens and closes both the electric valves 11a and 11b. The turbidity chromaticity meter 5 and the PH meter 8 are also provided by providing only the motor-operated valve 11a and closing the motor-operated valve 11a when abnormal turbid water is detected so that the sample water of the abnormal turbid water does not flow downward. It is possible to avoid a state in which residual substances of abnormal turbid water adhere to the residual chlorine meter 9.

[0019]

As described above, according to the present invention, a color discriminating sensor for detecting abnormal turbid water from the color of the sample water is provided at a specific portion of the inlet of the pipe for supplying the sample water to the water quality sensor. When it is determined that abnormal turbid water has occurred, the control unit switches the flow path switching means from the open state to the closed state to quickly stop the abnormal turbid water from flowing below the specified point, and immediately after the abnormal turbid water occurs. In this way, the measurement accuracy of the water quality sensor is deteriorated, and the internal cleaning required every time when abnormal turbid water is generated becomes unnecessary.

According to the structure of claim 2, a color discrimination sensor for detecting abnormal turbid water from the color of the sample water is provided at a specific portion of the inlet of the pipeline for supplying the sample water to the water quality sensor, and the specific of the inlet of the pipeline is specified. A flow path switching means that can switch between a first state in which the sample water is supplied to the water quality sensor side and a second state in which the sample water is blocked from flowing to the water quality sensor side and drained is provided below the point. Since the control unit is provided to switch the flow path switching means from the first state to the second state when the color discrimination sensor determines that abnormal turbid water is generated, when the color discrimination sensor detects abnormal turbid water from the color of the sample water. The controller switches the flow path switching means to supply the sample water to the water quality sensor side.
It is possible to prevent the intrusion of abnormal turbid water by automatically switching from the state 2) to the second state of discharging the sample water by blocking the flow of the sample water to the water quality sensor side. Since the sample water flows through the flow path switching means and is drained, the flow path switching means automatically switches to the state in which the sample water is supplied to the water quality sensor side when the color discrimination sensor determines that abnormal turbidity has been eliminated. It can be restored.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a water quality monitoring device of the present invention.

FIG. 2 is a configuration diagram of a conventional water quality monitoring device.

[Explanation of symbols]

1 Sample water supply port 2 Inlet valve 3 Pressure reducing valve 4a, 4b 1st, 2nd flowmeter 5 Turbidity colorimeter 6 Outlet valve 7a, 7b 1st, 2nd drainage port 8 PH meter 9 Residual chlorine meter 10 Color discrimination sensors 11a, 11b First and second motor-operated valves [flow path switching means] 12 Controller P Specific location of inlet of water quality monitoring device

Claims (3)

[Claims] 1. A color discrimination sensor for detecting abnormal turbid water from the color of the sample water is provided at a specific location at the inlet of the pipeline for supplying the water sample to the water quality sensor, and the color discrimination sensor is provided at the inlet of the pipeline below the specific location. Provided with flow path switching means for opening and closing the flow path of the sample water to the water quality sensor side, and provided with a control section for switching the flow path switching means from the open state to the closed state when the color discrimination sensor determines that abnormal turbid water has occurred. Water quality monitoring equipment for waterworks. 2. A color discrimination sensor for detecting abnormal turbid water from the color of the sample water is provided at a specific location at the inlet of the pipeline for supplying the water sample to the water quality sensor, and the color discrimination sensor is provided at the inlet of the pipeline below the specific location. The color discrimination sensor is provided with a flow path switching means capable of switching between a first state in which the sample water is supplied to the water quality sensor side and a second state in which the sample water is blocked from flowing to the water quality sensor side and drained. A water quality monitoring device for water supply, comprising a control section for switching the flow path switching means from the first state to the second state when it is determined that abnormal turbid water has occurred. 3. The control unit switches the flow path switching means from the first state to the second state when the color discrimination sensor determines that the abnormal turbidity has occurred, and when the color discrimination sensor determines that the abnormal turbidity has been eliminated. The water quality monitoring device for water supply in water supply system according to claim 2, wherein the flow path switching means is configured to switch from the second state to the first state.