JPH08136527A - Deaerator in water quality monitor - Google Patents

Abstract

PURPOSE: To reduce the flow out of a sample water when the bubbles are separated therefrom in order to prevent the intrusion of bubbles into a water quality meter. CONSTITUTION: The deaerator 1 is provided with an overflow port 2, a water supply port 3 and a delivery port 4, respectively, at the upper end part, in the center and at the lower end part of an enclosed tubular body 1a. The delivery port 4 is coupled through a piping 6 with a water quality meter 7, comprising a residual chlorine meter, a pH meter, a turbidity tintometer, etc., thus constituting a water quality monitor. In such a water quality monitor, a motor ON/OFF valve 9 is provided at the overflow port 2 and a controller 10 controls the motor ON/OFF valve 9 to open periodically or as required.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention enables to reduce the outflow of sample water when separating bubbles from the water sample water so that the bubbles do not enter the water quality measuring instrument for monitoring the water quality of the water. The present invention relates to a deaeration device in a water quality monitoring device.

[0002]

2. Description of the Related Art For example, in order to monitor the water quality of tap water, a water quality measuring instrument including a residual chlorine meter, a pH meter, and a turbidity color meter is installed in a pipe connected to a main water supply pipe, and the water tap is installed in the pipe. 100 ml / min to 350 ml / of sample water
The amount of residual chlorine in the sample water, pH value, turbidity, chromaticity, etc. are measured by circulating the sample water at a low flow rate of about min. When the flow rate of No. 1 is decreased, the residual chlorine amount in the sample water may change and the water quality data measured by the water quality meter may be abnormal.

Therefore, conventionally, as shown in FIG. 3, a deaerator 1 in which an overflow port 2 is formed at the upper end of a closed cylindrical body 1a, a water supply port 3 is formed at the center thereof, and a discharge port 4 is formed at the lower end thereof. Is provided, and the water supply port 3 is connected to a water supply main (not shown), and a water quality meter 7 is connected to the discharge port 4 via a pipe 6, and the sample is placed from the water supply port 3 into the closed cylindrical body 1a. By supplying the water W, the bubbles A contained in the sample water W are discharged together with the overflow water from the overflow port 2, and the degassed sample water W is discharged from the discharge port 4 via the pipe 6 to a water quality measuring instrument. It supplies to 7.

[0004]

SUMMARY OF THE INVENTION In the above conventional configuration,
The sample water W is constantly flowing out from the overflow port 2,
Due to the large amount of runoff, it is a big problem especially during drought. In view of the above problems, the present invention, when separating the bubbles from the sample water so that the bubbles do not enter the water quality measuring instrument,
It is an object of the present invention to provide a deaeration device in a water quality monitoring device that can reduce the outflow of sample water.

[0005]

In order to achieve the above object, the invention according to claim 1 forms an overflow port at an upper end portion of a closed cylindrical body, a water supply port at a central portion thereof, and a discharge port at a lower end portion thereof. In the water quality monitoring device, which has a degassing device, and which is connected to a water quality meter consisting of a residual chlorine meter, a pH meter, a turbidity color meter, etc., through the piping and piping at the discharge port, an opening / closing valve is provided at the overflow port. A control device is provided for controlling the opening / closing valve to be opened periodically or at a desired time.

According to a second aspect of the present invention, there is provided a deaerator having an overflow port at the upper end of the closed cylindrical body, a water supply port at the center thereof, and a discharge port at the lower end thereof. In a water quality monitoring device connected to a water quality measuring instrument consisting of a residual chlorine meter, a pH meter, a turbidity color meter, etc. through a pipe, a lower limit water level detection for detecting that the water surface in the closed cylinder has reached a predetermined lower limit water level. And a control device for temporarily opening the open / close valve based on the detection signal of the lower limit water level detector.

[0007]

In the invention of claim 1, the on-off valve is normally closed, and when the sample water is supplied from the water supply port into the closed cylindrical body, the bubbles contained in the sample water rise and the sample water and the bubbles And are separated. Then, the degassed sample water is supplied from the discharge port to the water quality measuring instrument through the pipe, whereby the flow rate of the sample water flowing through the water quality measuring instrument can be maintained at a predetermined level and the water quality can be accurately measured. .

Further, since the air bubbles separated from the sample water are accumulated in the upper part of the closed cylindrical body, the control device opens the on-off valve regularly or at a desired time to discharge the accumulated air bubbles from the overflow port. You can

In this case, the opening / closing valve of the overflow port is opened periodically or at a desired time for deaeration, and the amount of sample water flowing out from the overflow port at the time of the deaeration is small. It can save much water compared to.

In the invention of claim 2, the on-off valve is normally closed, and when the sample water is supplied from the water supply port into the closed cylindrical body, the sample water and the bubbles are separated from each other, as in the invention of claim 1. Separated, the water quality of the sample water can be accurately measured by the water quality meter.

Further, the air bubbles separated from the sample water accumulate in the upper part of the closed cylinder, and when the lower limit water level detector detects that the water surface has dropped and reaches a predetermined lower limit water level, the control device is based on the detection signal. By temporarily opening the on-off valve, the accumulated air bubbles can be discharged from the overflow port.

In this case, when a predetermined amount of bubbles are accumulated in the upper part of the closed cylinder, the opening / closing valve of the overflow port is temporarily opened to evacuate the air. It is possible to prevent the sample water from flowing out, and it is possible to save much more water than before.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of the present invention, in which an electric opening / closing valve 9 is provided at an overflow port 2 of a closed cylindrical body 1a of a deaerator 1, and the electric opening / closing valve 9 is regularly or when desired. A control device 10 including a microcomputer for controlling to open is provided. Since the configuration other than the above is almost the same as that of the conventional example shown in FIG. 3, the same reference numerals are given to the same portions and the description thereof will be omitted.

In the above structure, the bubble storage time T required to store a predetermined amount of the bubble A in the upper end portion of the closed cylindrical body 1a in advance and the stored bubble A are discharged to the outside by opening the electrically operated on-off valve 9. The bubble discharge time t required for the measurement is measured, and the bubble accumulation time T and the bubble discharge time t are programmed in the memory of the control device 10.

During operation of the water quality measuring instrument 7, the control device 10 opens the electric on-off valve 9 when the bubble accumulation time T has elapsed based on the program, and when the bubble discharge time t has elapsed from the opening time. The electric on-off valve 9 is closed with, and the electric on-off valve 9 is opened and closed by the same procedure thereafter.
As a result, the electric on-off valve 9 is normally closed,
When the sample water W is supplied from the water supply port 3 into the closed cylindrical body 1a,
The bubbles A contained in the sample water W rise, and the sample water W and the bubbles A are separated. Then, the degassed sample water W is supplied from the discharge port 4 to the water quality measuring instrument 7 through the pipe 6, whereby the flow rate of the sample water W flowing in the water quality measuring instrument 7 is maintained at a predetermined level and the water quality is accurately measured. Can be measured.

Further, since the bubbles A separated from the sample water W are accumulated in the upper part of the closed cylindrical body 1a, as described above, the control device 10 causes the electric on-off valve 9 to discharge bubbles for every bubble accumulation time T. By opening for t, the accumulated air bubbles A can be discharged from the overflow port 2. The electrically operated on-off valve 9 can be temporarily opened at a desired time by directly operating the control device 10 on the spot or remotely operating it from the monitoring room via a telemeter or the like.

In this case, the electric on-off valve 9 of the overflow port 2 is opened periodically or at a desired time to degas, and the amount of the sample water W flowing out from the overflow port 2 at the time of degassing is It is very small and can save much water compared to the conventional method.

FIG. 2 shows a second embodiment of the present invention, in which a lower limit water level detector 11 is provided on the upper part of the closed cylinder 1a, and its electrode 11a is hung in the closed cylinder 1a. , The electrode 11a is in an energized state when the electrode 11a is in contact with the sample water W in the closed cylindrical body 1a, and the water surface W. L is lower than the electrode 11a and the lower limit water level L.L. When it reaches L, the electrode 11a becomes in a non-conductive state, a detection signal is output from the lower limit water level detector 11 to the control device 10, and based on the detection signal, it is programmed in the memory of the control device 10. The electric opening / closing valve 9 is opened only during the bubble discharging time t. Since the configuration other than the above is almost the same as that of the first embodiment shown in FIG. 1, the same parts are designated by the same reference numerals and the description thereof will be omitted.

In the above structure, the electrically operated on-off valve 9 is normally closed, and when the sample water W is supplied from the water supply port 3 into the closed cylindrical body 1a, the sample water W and the air bubbles are generated as in the first embodiment. Since A and A are separated, the water quality of the sample water W can be accurately measured by the water quality meter 7.

Further, the air bubbles A separated from the sample water W accumulate in the upper part of the closed cylindrical body 1a, and the water surface W. L is lowered to a predetermined lower limit water level L.L. Lower limit water level detector 11
When it is detected by, the control device 1 is based on the detection signal.
By temporarily opening the motor-operated on-off valve 9 for 0 for the bubble discharge time t, the accumulated bubble A can be discharged from the overflow port 2.

In this case, air bubbles A are present in the upper part of the closed cylinder 1a.
When a predetermined amount is accumulated, the electric opening / closing valve 9 of the overflow port 2 is temporarily opened to degas, and the sample water W is hardly discharged from the overflow port 2 at the time of degassing. It is possible to save much more water than before.

In the second embodiment, the lower limit water level detector 1
Although the controller 10 opens the electrically operated on-off valve 9 for the bubble discharging time t based on the detection signal of No. 1, instead of this, an upper limit water detector having the same function as the lower limit water level detector 11 is provided. The water level W. It is detected that L has reached the upper limit water levels H and L, and the control device 10 is based on the detection output signal.
The electrically operated on-off valve 9 may be closed by.

[0023]

According to the invention described in claim 1, the open / close valve of the overflow port is opened periodically or at a desired time for deaeration, and the sample flowing out from the overflow port at the time of the deaeration. Since the amount of water is small, it is possible to save much more water than before.

According to the second aspect of the invention, the controller temporarily opens the opening / closing valve of the overflow port based on the detection signal of the lower limit water level detector when a predetermined amount of bubbles are accumulated in the upper portion of the closed cylinder. To degas.
It is possible to prevent almost no sample water from flowing out from the overflow port during the deaeration, and it is possible to save water much more than before.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing a water quality monitoring device equipped with a deaerator which is a first embodiment of the present invention.

FIG. 2 is a schematic explanatory view showing a water quality monitoring device equipped with a degassing device which is a second embodiment of the present invention.

FIG. 3 is a schematic explanatory view showing a conventional example.

[Explanation of symbols]

 1 Deaeration device 1a Closed cylinder 2 Overflow port 3 Water supply port 4 Discharge port 6 Piping 7 Water quality instrument 9 Electric open / close valve 10 Control device 11 Lower limit water level detector A Bubble W Sample water L. L lower limit water level W. L water surface

Claims (2)

[Claims] 1. An overflow port at the upper end of the closed cylinder,
A water quality measuring instrument comprising a degassing device having a water supply port at its central portion and a discharge port at its lower end, and a residual chlorine meter, a pH meter, a turbidity color meter, etc., through piping at the discharge port. In the water quality monitoring device, the degassing device in the water quality monitoring device is provided with an opening / closing valve at the overflow port, and a control device for controlling the opening / closing valve to open periodically or at a desired time. 2. An overflow port at the upper end of the closed cylinder,
A water quality measuring instrument comprising a degassing device having a water supply port at its central portion and a discharge port at its lower end, and a residual chlorine meter, a pH meter, a turbidity color meter, etc., through piping at the discharge port. In the water quality monitoring device connected to, a lower limit water level detector for detecting that the water surface in the closed cylinder has reached a predetermined lower limit water level, an opening / closing valve at the overflow port, a detection signal of the lower limit water level detector A degassing device in a water quality monitoring device, wherein a control device for temporarily opening the on-off valve based on the above is provided.