JPH08145982A - Water quality automatic measuring instrument - Google Patents

Abstract

PURPOSE: To measure water quality data for each specific time and each depth by providing a hose take-up device, a water bath for storing sample water, a water-sampling pump for sucking the sample water, and a detector for measuring water quality data. CONSTITUTION: A water-sampling nozzle 21 is mounted to one tip of a hose 20 and a hose take-up device 22 for winding off the hose to a specific depth is installed at the other tip. A water-sampling pump 23 for sucking the sample water through a hose 20 from the nozzle 21 is piped and connected to the device 22, the dust of the sample water is eliminated by a strainer 24, and the sample water is led to a water bath 25. A plurality of detector elements 26 for measuring each water quality data such as turbidity, water temperature, and pH are provided in the water bath 25 so that they are dipped in the sample water. A signal is outputted to the device 22 for driving it so that the nozzle 21 reaches a specific depth from a controller 31. The pump 23 is operated and the sample water is sucked into the water bath 25. In the water bath 25, each kind of element 26 measures the water quality data of the sample water and the measurement result is outputted to the device 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for automatically measuring water quality such as turbidity and water temperature in specific water areas such as lakes and dam reservoirs.

[0002]

2. Description of the Related Art It is important to accurately observe the distribution status of water quality data at a desired depth from the water surface in lakes and dam reservoirs, and to grasp the water pollution status in order to perform discharge and purification operations. There is. That is, this information is important not only when the stored water is taken as drinking water, but also when the cold water layer or the turbid water layer is discharged to the downstream region, it affects the growth of crops, and further, the turbidity, the water temperature, and the dissolved oxygen. , PH, etc. also affect freshwater fish farming, plankton growth, etc., and there is a risk of compensation problems if the discharge and purification operations are mistakenly performed.

In order to prevent such problems, it is necessary to put a detector for taking water quality data at a desired depth into water, and it is desirable to constantly and accurately observe water quality data. ing. So, for example, as shown in FIG.
Also, water quality data such as turbidity and water temperature are measured by the device shown in FIG. That is, as shown in FIG. 2, a tower 1 is constructed on the lake shore or the bottom of the lake, and the detector 2 for observation is vertically moved up and down along the tower, or as shown in FIG. There is a buoyant body method in which the body 6 is floated, a plurality of fixed detection bodies are installed directly below the buoyancy body, or a winch 7 is provided on the buoyancy body to automatically raise and lower the detection body 2 for measurement. Since the amount of stored water increases or decreases depending on the amount of rainwater and discharge, the height of the lake surface 5 is at the maximum. W. L, N.M. in the middle. W. L, at least L. W. It becomes L.

[0004]

The conventional water quality measuring device described above has the following problems. (1) The tower system for constructing the tower 1 on the lake quay 3 has a large amount of equipment including auxiliary equipment that allows horizontal movement and vertical movement, resulting in high construction costs and poor maintenance and inspection. is there. Further, the water that can be collected is limited to within the arm length range of the arm member 4 near the lake shore of the dam, and there is a problem that only locally biased water quality data can be collected and observed, not the entire dam. In addition, in order to obtain water quality data for the entire dam, it is necessary to collect the water at the deepest point in the central part of the dam reservoir away from the shoreline, and construct a tower that is a structure on the bottom of the lake at such a point. It is difficult in terms of technology and cost, and since the amount of stored water increases and decreases due to rainwater and discharge, there is a risk that the tower will be damaged by muddy flow and dust / driftwood floating in it. (2) In an artificial lake with a dam, we fear that construction of the tower will adversely affect the structural strength of the dam and prohibit the construction of structures such as towers, and dam reservoirs such as national parks and national parks. In the case of being in a specific area, there is also a problem that the tower is prohibited from appearing on the surface of the lake in order to protect the landscape and protect the environment. (3) In the buoyancy body method, when the detection body 2 is lowered from the buoyancy body 5 to a predetermined depth, the precise detection body 2 using mechanical, electrical or optical detection method is entangled with the dead tree 8 There are problems that the rocks and driftwood collide with the abandoned house 9 and are damaged, or that they cannot be pulled up because they are buried in the sludge accumulated on the lake bottom 10. (4) Further, in the buoyancy body method, the electric signal output from the detection body 2 using the mechanical, electrical, and optical detection methods is transmitted through the conductor wire in the cable 11, and the slip ring is used in the cable winding portion 12. Finally, it is transmitted to the dam management room 13 through the control panel. Here, FIG. 4 shows a schematic diagram of the structure of the slip ring. The function of the slip ring is that the fixed brush 17 is provided on the outer periphery of the slip ring by the slip ring 16 formed of gun metal or the like mounted on the outer periphery of the rotating member 14 via the insulating member 15 having a small contact resistance. This is to electrically connect the rotating conductor portion to the fixed conductor portion via the conductor wire 18. Therefore, by using the slip ring, there is an incomplete circuit, that is, a physical contact portion (contact point) inside the transmission system, and thus electrical noise, which is a harmful component that disturbs the signal of the transmission system, is easily generated. Note that such electrical noise causes a problem that accurate information of the detector 2 cannot be transmitted. (5) In both the tower method and the buoyant body method, the detection body that detects water quality data is always immersed in water, so its life is shortened and it must be a water pressure resistant structure that can withstand a water depth of hundreds of tens of meters. . If the water around the detector remains stationary, a measurement error will occur.

That is, the above-mentioned conventional water quality measuring device has a problem that not only the structure is complicated and the equipment cost rises, but also maintenance and maintenance are troublesome. Therefore, the object of the present invention is to solve the problems of the prior art, inexpensive equipment cost and easy maintenance, and error in measuring the water quality at the desired position and depth of the dam reservoir. It is an object of the present invention to provide an automatic water quality measuring device that can always measure accurately and easily and can extend the life of the water quality data detector.

[0006]

According to the present invention, a buoyant body moored on a water surface, a hose winding device for unwinding / winding a hose for flowing sample water on the buoyant body, and sucking up the sample water. A water sampling pump, a water tank for storing the sample water, a detector installed in the water tank and measuring water quality data of the sample water sucked up by the water sampling pump, the hose winding device, and a detector. The water quality data is measured at a predetermined time and at a predetermined depth.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram of an automatic water quality measuring apparatus for carrying out the present invention, and the same portions as those in FIGS. 2 and 3 are denoted by the same reference numerals. The automatic water quality measuring device 19 according to the present embodiment has a configuration described below.
A water sampling nozzle 21 is attached to one end of the hose 20, and a hose winding device 22 for unwinding or winding the hose to a predetermined depth is installed on the other side. In addition, in order to accurately grasp the depth of the tip of the water sampling nozzle 21, a mark is provided on the outer circumference of the hose 20 at equal intervals and the mark is read by a sensor, or the hose take-up device 22 has its rotating part. A method of installing a sensor for reading the number of revolutions is adopted (not shown). A water sampling pump 23 for sucking up the sample water from the water sampling nozzle 21 through the hose 20 is connected to the hose winding device by piping, and the tip of the water sampling pump is connected to the water sampling pump 23. A strainer 24 is piped to remove large dust, and finally the pipe is guided to a water tank 25. A plurality of detector elements 26 for measuring various kinds of water quality data such as turbidity, water temperature and PH are attached to the water tank so as to be immersed in the sample water. Further, in order to prevent the sample water sucked up by the water sampling pump 23 from overflowing from the water tank 25, an overflow pipe 27 is connected to the upper part of the side wall of the water tank 25 to discharge the excess sample water to the outside lake surface 5. A discharge pipe 28 is connected to the lower part of the side wall of the water tank 25, and a lake surface 5 is connected via a discharge valve 29.
Is in communication with The sample water after the measurement is discharged to the lake surface 5 by opening the discharge valve. The output signal of each water quality data from the detector element is output to the control device 31 via each converter 30, and the water quality at a desired time can be measured. All the above-mentioned components are installed on the buoyancy body 6, and the buoyancy body is moored to the concrete anchor driven into the lakeshore via a rope (not shown).

Next, the movement of water quality measurement by the automatic water quality measuring device 19 will be described. First, the hose winding device 2 is controlled by the control device 31 so that the water sampling nozzle 21 has a predetermined depth.
A signal is output to 2 for driving, and the drain valve 29 is closed. In this state, the water sampling pump 23 is operated by a command signal from the sequencer terminal 32 of the control device 31, and the sample water is sucked up into the water tank 25. In the water tank 25, the various detector elements 26 measure the water quality data of the sample water, and at that time, the water sampling pump 23 continues to operate until the measurement is completed, and the sample water exceeding the installation position of the overflow pipe 27 is not collected. Overflowing from the overflow pipe 27, new sample water constantly flows into the water tank 25, and the quality of this new sample water is measured by the detector element 26. The measurement result of the detector element 26 is output to the control device 31 and transmitted to the dam management room 13 remote from the remote I / O 33 in the control device via the cable 11 such as an internet or an optical cable.
In the dam management room 13, the measurement result can be read by the monitor unit or the recording unit. In addition, in the dam management room 13, judging from this water quality data measurement result
Perform purification operation. The dimensions of the water tank 25 in this embodiment are 200 mm in length × 200 mm in width × 100 mm in depth, that is, a capacity of 4 l, the residence time in the water tank 25 is 5 seconds, the capacity of the water sampling pump 23 is 48 l / min, and the lift is 5 m. , Flow velocity 2m /
The inner diameter of the hose was φ25 in seconds. When the water quality measurement of the sample water at the predetermined depth is completed, the water sampling pump 23 is stopped, the drain valve 29 is opened, and the water tank 25 is opened via the discharge pipe 28.
Drain the sample water stored in. Water quality data of sample water at other predetermined depths can also be measured in the same manner as described above.

[0009]

As described in detail above, the present invention has the following effects. (1) Provides a system that automatically measures water quality of lake water, dam reservoirs, etc. without compromising the landscape, with a simple structure including incidental facilities, compact structure, easy inspection and maintenance, inexpensive equipment and maintenance costs can do. (2) In order to install the detector element in the water tank on the buoyancy body,
The detector element does not need pressure resistance and can be used as a general-purpose detector element, and the detector element does not become entangled with dead trees or rocks or buried in the sludge on the lake bottom and damaged, resulting in a long life of the detector element. Can be realized. Furthermore, since the detector element is always installed on the surface of the lake, maintenance and adjustment is easy. (3) Since there is no physical contact portion (contact point) such as a slip ring in the middle of the transmission circuit and the gable length is short, electrical noise is unlikely to occur and the water quality data measurement accuracy is improved.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an automatic water quality measuring device according to one embodiment of the present invention.

FIG. 2 is a side view showing a schematic configuration of a conventional tower-type water quality measuring device.

FIG. 3 is a side view showing a schematic configuration of a conventional buoyancy body type water quality measuring device.

FIG. 4 is a structural schematic view of a slip ring used in the buoyancy body type water quality measuring device of FIG.

[Explanation of symbols]

1: Tower, 2: Detecting body, 3: Lake quay, 4: Arm member, 5: Lake surface, 6: Buoyant body, 7: Winch, 8: Dead tree,
9: Abandoned house, 10: Lake bottom, 11: Cable, 12: Cable winding section, 13: Dam management room, 14: Rotating member, 15: Insulating member, 16: Slip ring, 17: Fixed brush, 18: Conducting wire, 19: Automatic water quality measuring device, 20: hose, 21: water sampling nozzle, 22: hose winding device, 2
3: Water sampling pump, 24: Strainer, 25: Water tank, 2
6: detector element, 27: overflow pipe, 28: drain pipe, 29: drain valve, 30: converter, 31: control device, 3
2: Sequencer terminal, 33: Remote I / O

Claims (1)

[Claims] 1. A buoyant body moored on the water surface, a hose winding device for unwinding / winding up a hose for flowing sample water on the buoyant body, a water sampling pump for sucking up the sample water, and the sample water. A water tank that stores water, a detector that is installed in the water tank and that measures water quality data of the sample water sucked up by the water sampling pump, and a controller that controls the operation of the hose winding device and the detector. The water quality automatic measuring device is characterized by measuring water quality data at a predetermined time and at a predetermined depth.