JP5475076B2 - Residual chlorine meter with water level change detection function - Google Patents

Description

  The present invention relates to a residual chlorine meter that measures the residual chlorine concentration of seawater as test water, and relates to a residual chlorine meter with a water level change detection function capable of detecting a drop in seawater level.

  For example, in a thermal power plant, seawater is used for cooling the plant, and the seawater used for cooling is constantly monitored by a residual chlorine meter to confirm that there is no problem before returning it to the ocean. . Here, the residual chlorine meter is a device for taking seawater as test water from the ocean through a pipe and measuring the residual chlorine concentration in a measurement tank. However, shellfish etc. may be mixed in the seawater taken from the ocean, and if it adheres and forms in the piping of the residual chlorine meter, the piping is clogged (clogged), and the residual chlorine meter There is a risk that the water level of the measuring tank will be lowered. When the water level in the measuring tank is lowered, there is a problem that an accurate chlorine concentration cannot be measured. Specifically, the residual chlorine meter displays the residual chlorine concentration as `` zero '' when there is no residual chlorine in the seawater, but even if the seawater level is zero, the residual chlorine concentration is “Zero” is displayed. For this reason, there is a problem that it cannot be determined whether the residual chlorine concentration is displayed correctly or whether the seawater level is zero only by displaying the residual chlorine concentration as “zero” on the residual chlorine meter. . Therefore, in the residual chlorine meter, it is necessary to check that the seawater level is not zero by inspecting the piping or measuring the water level. However, since the residual chlorine meter is disposed at a place away from a manned facility such as a central control station, inspection requires time and effort. In addition, since it is impossible to check the state of the pipe or measure the water level in real time, the detection of the blockage of the pipe or the drop in the water level is delayed, and it may take more time to respond. .

Registered Utility Model No. 3022527

  In the technique described in the cited document 1, a float water level meter is provided in a water tank, and the water level is managed by a level switch.

  However, the measurement tank of the residual chlorine meter with a water level change detection function according to the present invention is constantly stirred for cleaning the electrode of the measurement sensor for measuring the residual chlorine increase, and the water level meter is provided. It is difficult to measure the water level. Therefore, in the past, humans confirmed water level changes by patrol.

  Accordingly, an object of the present invention is to provide a residual chlorine meter with a water level change detection function capable of detecting a drop in seawater level in the residual chlorine meter.

In order to solve the above-mentioned problem, the invention of claim 1 is a residual chlorine meter with a water level change detection function capable of detecting a water level change of seawater taken as test water through a pipe, and has flowed in from the pipe. A water detection tank that sends out the seawater at a predetermined flow rate, a measurement tank that measures the residual chlorine concentration, the seawater flows from the water detection tank, and a water level change that is disposed in the water detection tank and detects a change in the water level of the seawater. e Bei a detector, the inner diameter of the pipe to seawater into the test water tank flows, the than the inner diameter of the pipe from the test water tank to the measuring tank is set to a small, water level changes, wherein Residual chlorine meter with detection function.

According to this invention, the inner diameter of the pipe into which the seawater flows into the test tank is set smaller than the inner diameter of the pipe from the test tank to the measurement tank, so that the water level change detection unit disposed in the test tank , Sea level change is detected.

  According to a second aspect of the present invention, in the residual chlorine meter with a water level change detecting function according to the first aspect, when the water level change of the seawater detected by the water level change detection unit is a predetermined value or more, the detection result is externally transmitted. It transmits to the apparatus of characterized by the above-mentioned.

  According to the first aspect of the present invention, the water level change in the water detection tank can be detected by the water level change detection unit disposed in the water detection tank upstream of the residual chlorine concentration measurement tank. In other words, since the water level in the measurement tank downstream of the water detection tank is linked to the water level in the water detection tank, the change in the water level in the measurement tank can be grasped by the water level change in the water detection tank. That is, for example, when it is detected that the piping is closed due to adhesion and growth of shellfish or the like, and the water level in the test tank is lowered, it can be understood that the water level in the measurement tank is decreasing.

  In addition, since the water level change can be automatically detected by the water level change detecting unit, it is not necessary to inspect the pipes or for the person to measure the water level, and the labor and time required for the work can be reduced. Specifically, when the residual chlorine concentration is displayed as “zero”, if an abnormal water level change is not detected, it can be determined that an accurate residual chlorine concentration is displayed.

  Furthermore, since a water level change detection part can grasp | ascertain a water level change in real time, a quicker response | compatibility is attained. For this reason, the quality of the seawater used for cooling can be monitored more appropriately.

  According to the second aspect of the present invention, when the water level change detected by the water level change detection unit is equal to or greater than a predetermined value, the detection result is transmitted to an external device. The water quality can be reliably monitored. Thus, since it is not necessary to make a patrol for the inspection of the piping and the measurement of the water level, the labor and time required for the work can be reduced.

It is a schematic block diagram of the residual chlorine meter with a water level change detection function which concerns on embodiment of this invention. It is a front view which shows the residual chlorine meter with a water level change detection function of FIG. It is a perspective view which shows the float switch of the residual chlorine meter with a water level change detection function of FIG. It is front sectional drawing which shows the state which has arrange | positioned the float switch of FIG. 3 to the test tank, and has shown the state of the normal water level. It is front sectional drawing which shows the state which has arrange | positioned the float switch of FIG. 3 in the water test tank, and has shown the state which the water level fell.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  1 to 5 show an embodiment of the present invention. The residual chlorine meter 1 with a water level change detection function measures the residual chlorine concentration of seawater as test water, and can detect a drop in seawater level in the residual chlorine meter. As shown in FIG. 1, the residual chlorine meter 1 with a water level change detection function can communicate with a monitoring device (not shown) disposed in a central control station C via a communication network NW. The amount and the detected water level change can be transmitted.

  Here, the central control station C includes a residual chlorine amount display monitor 100 and a water level display monitor 200 which are controlled by a monitoring device. The residual chlorine amount display monitor 100 has a function of displaying the residual chlorine amount received by the monitoring device, and the water level display monitor 200 has a function of displaying the water level change received by the monitoring device. Specifically, when the switch is OFF, that is, when the water level change is within a predetermined value, the monitoring device outputs that the water level is normal as character information, and the switch is ON, that is, the water level change is greater than or equal to the predetermined value. In the case of, the fact that the water level is abnormal (water level drop) is output as text information and voice information.

  Further, as shown in FIG. 2, the residual chlorine meter 1 with a water level change detection function mainly includes an inflow part 2, an outflow part 3, a water test tank 4, a measurement tank 5, a residual chlorine sensor 6, an internal liquid. A tank 7, a residual chlorine converter 8, and a float switch (water level change detection unit) 9 shown in FIG. 3 are provided.

  The inflow part 2 takes in seawater Win, W0in as test water from the outside, and mainly includes a test water inlet 21, a three-way switching valve 22, and a calibration device side inlet 23. The test water inlet 21 and the calibration device side inlet 23 are connected to a pipe (not shown) on the water test tank 4 side via a three-way switching valve 22. That is, the seawater Win, W0in flowing into the inflow portion 2 is adjusted to the flow rate by the three-way port switching valve 22 and sent to the water detection tank 4. Further, seawater Win is taken in from the inspection water inlet 21 at all times during operation of the plant.

  The outflow part 3 discharges seawater Wout and W0out as discharge test water to the outside, and mainly includes a drain 31, a three-way switching valve 32, and a calibration device side outlet 33. The drain 31 and the calibration device side outlet 33 are connected to piping (not shown) on the measurement tank 5 side via a three-way switching valve 32. That is, the seawater Wout and W0out sent out from the measurement tank 5 are adjusted by the three-way port switching valve 32 and discharged. Further, the seawater Win is discharged from the drain 31 at all times during operation of the plant.

  The test water tank 4 is a tank for storing the seawater W, and even if the flow rate of the seawater W flowing from the test water inlet 21 fluctuates, it is sent to the measurement tank 5 by keeping the water level of the seawater W constant. The flow rate of the seawater W to be maintained is kept constant. For example, the seawater tank 4 overflows when the seawater W flowing in from the inflow portion 2 is stored in the tank and reaches a certain water level. Then, the overflowed seawater W flows into the measurement tank 5 at a constant flow rate via a pipe (not shown).

  The measurement tank 5 is provided with an electrode portion of the residual chlorine sensor 6 so that the seawater W flowing in from the test water tank 4 is brought into contact with the residual chlorine sensor 6 at a constant flow rate. The measurement tank 5 is loaded with beads (not shown) for cleaning the electrode portion of the residual chlorine sensor 6, and the beads are jetted by seawater W blown from a nozzle (not shown). Clean the electrode by moving

  Here, the inner diameter of the pipe from the inflow portion 2 to the test tank 4 is smaller than the inner diameter of the pipe from the test tank 4 to the measurement tank 5, and the blockage of the pipe occurs upstream of the test tank 4. For this reason, when there is no drop in the level of the seawater W in the test water tank 4, the pipe is not blocked on the downstream side, so that the drop in the level of the seawater W in the measurement tank 5 does not occur.

  The residual chlorine sensor 6 detects the residual chlorine concentration of the seawater W in the measurement tank 5 and transmits the data to the residual chlorine converter 8.

  The internal liquid tank 7 is a tank for a reagent necessary for measuring the residual chlorine concentration by the residual chlorine sensor 6, and sends a predetermined amount to the measurement tank 5.

  The residual chlorine converter 8 includes an operation panel and a display unit disposed on the front surface of the casing, an external wiring connection terminal plate (not illustrated) disposed at the lower part of the casing, and a measurement circuit (not illustrated) accommodated in the casing. And. The residual chlorine converter 8 receives and displays the residual chlorine concentration measured by the residual chlorine sensor 6 and receives ON / OFF of a contact (switch) in the float switch 9 as an electrical signal. The residual chlorine converter 8 has a function of generating each output signal.

  The external wiring connection terminal plate is provided with a transmission signal outlet 81 and a power supply inlet 82. The transmission signal outlet 81 can be connected to a communication cable (not shown) and can be connected to a monitoring device (not shown) of the central control station C. The communication cable connected to the transmission signal outlet 81 transmits the electrical signal received from the float switch 9 to the monitoring device of the central control station C.

  The power supply inlet 82 can be connected to a commercial power supply via a power line, and is supplied with power consumed by the residual chlorine converter 8.

  The measurement circuit has a function of converting the residual chlorine concentration received from the residual chlorine sensor 6 and displaying it on the display unit.

  As shown in FIG. 3, the float switch (water level change detection unit) 9 is fixed in a state of being inserted through the lid 41 of the test water adjustment tank 4, and measures the water level of the water test tank 4. It is made of a material that is resistant to corrosion. Specifically, the float switch 9 mainly includes a shaft 91, a float 92, and a stopper 93. The shaft 91 is a rod-like body extending downward from the lid 41 and is screwed in a state of being inserted through the lid 41. The lower portion of the shaft 91 is set to such a length as to be immersed in the seawater W in the water test tank 4 as shown in FIG. The shaft 91 is provided with a float 92 that is slidable in the axial direction.

  The float 92 is set to have a shape and weight that floats on the surface of the seawater W in the test tank 4 and moves up and down as the water level of the seawater W changes. The float 92 is positioned at a height d1 (for example, 10 cm) from the bottom surface of the water test tank 4 when the seawater W is at a normal water level. At this time, the switch (not shown) is OFF, and the data is transmitted to the residual chlorine converter 8.

  The stopper 93 is disposed on the lower end side of the shaft 91. Specifically, the seawater W is fixed at a distance d2 below the normal water level. Here, the distance d2 is a threshold value for determining that the water level drop of the seawater W is abnormal, and is set to 2 cm, for example. This water level is set within a range where the residual chlorine concentration is correctly measured. When the float 92 comes into contact with the stopper 93, the switch is turned on and the data is transmitted to the residual chlorine converter 8.

  Next, a method and an action of detecting the water level change in the water detection tank 4 by the residual chlorine meter 1 with the water level change detecting function having such a configuration will be described.

  While starting up the residual chlorine meter 1 with a water level change detection function, the residual chlorine concentration of the seawater W in the measuring tank 5 measured by the residual chlorine sensor 6 is generated on the display unit of the residual chlorine converter 8 and is controlled centrally. It is displayed on the residual chlorine amount display monitor 100 at the place C.

  First, as shown in FIG. 4, the case where the seawater W in the test water tank 4 is at the normal water level, that is, the case where the water surface is at a height d1 (for example, approximately 10 cm) from the bottom surface of the water test tank 4 will be described. At this time, the float 92 floats on the water surface and is at a height d1 from the bottom surface of the water test tank 4. That is, since the float 92 and the stopper 93 are separated from each other, the switch is OFF. In this case, the water level display monitor 200 of the central control center C displays that the water level is normal.

  Next, the case where the water level of the seawater W in the water inspection tank 4 is lowered as shown in FIG. 5, that is, the case where the water surface is lowered by d2 (for example, 2 cm) from the normal water level will be described. At this time, the float 92 is at a position d2 lower than the normal water level of the water test tank 4. That is, since the float 92 and the stopper 93 are in contact with each other, the switch is ON. In this case, the water level display monitor 200 of the central control station C displays that the water level has been lowered (the water level is abnormal) and outputs an alarm sound.

  And if the character information and audio | voice information of the water level display monitor 200 are confirmed by the monitoring person, the operation | work which eliminates blockage | closure of piping will be performed rapidly.

  Next, a case where the water level of the seawater W in the water inspection tank 4 is recovered, that is, a case where the water surface is recovered from the water level shown in FIG. 5 to the normal water level side will be described. At this time, the float 92 is at a position lower than the normal water level of the test tank 4, but the switch is OFF because the float 92 and the stopper 93 are in contact with each other. In this case, the water level display monitor 200 of the central control center C displays that the water level is low (the water level is abnormal) and an alarm sound are stopped, and that the water level is normal.

  In this way, by installing the residual chlorine meter 1 with the water level change detection function, the water level change of the seawater W in the water detection tank 4 is detected by ON / OFF of the float switch 9, and the water level of the central control station C is detected. It is always displayed on the display monitor 200.

  As described above, according to the residual chlorine meter 1 with the water level change detection function, the water level change can be detected by the float switch 9 disposed in the water detection tank 4 upstream of the residual chlorine concentration measurement tank 5. it can. That is, for example, when it is detected that the piping is closed due to adhesion and growth of shellfish and the water level in the water detection tank 4 is lowered, it is possible to grasp that the water level in the measurement tank 5 is decreasing. it can.

  Further, since the change in the water level can be automatically detected by the float switch 9, it is not necessary to inspect the piping or for the person to measure the water level, and the labor and time required for the work can be reduced. Specifically, when the residual chlorine concentration is displayed as “zero” on the display unit of the residual chlorine converter 8 of the residual chlorine meter 1 with a water level change detection function or the residual chlorine amount display monitor 100 of the central control station C. If no abnormality is output to the water level display monitor 200, it can be determined that an accurate residual chlorine concentration is displayed without patrol.

  Moreover, since the water level measurement of the seawater W can be detected with a simple configuration without using a sensor or the like, maintenance is easy.

  Furthermore, since the water level change can be grasped in real time by the float switch 9, it becomes possible to respond more quickly, and the water quality of the seawater used for cooling can be more reliably monitored.

  Furthermore, when the change in the water level of the seawater W detected by the float switch 9 is greater than or equal to a predetermined value, the detection result is displayed on the water level display monitor 200 of the central control station C. The water quality can be reliably monitored. This eliminates the need for inspection for piping inspection and maintenance, thereby reducing labor and time.

  Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above embodiment, and even if there is a design change or the like without departing from the gist of the present invention, Included in the invention. For example, in the above embodiment, the change in the water level of the seawater W in the water detection tank 4 is detected by turning on / off the float switch 9, but it may be detected by a sensor or the like. In this case, when the measured water level is equal to or lower than the predetermined value (when the water level in the water detection tank 4 is lower than the predetermined value), data indicating that the water level has decreased may be transmitted to the residual chlorine converter 8. Good.

  Moreover, it is good also as detection of the water level change of the seawater W in the water test tank 4 in several steps. Specifically, for example, it is possible to detect when the seawater W is lowered by 1 cm, 2 cm, or 3 cm from the surface of the normal water level, such as “Beware of water level drop”, “Water level drop”, “Emergency response required”, etc. You may make it display on the water level display monitor 200 of the central control center C. FIG.

1 Residual chlorine meter with water level change detection function 2 Inflow part 3 Outflow part 4 Water detection tank 5 Measurement tank 6 Residual chlorine sensor 7 Internal liquid tank 8 Residual chlorine converter 81 Transmission signal outlet 82 Power supply inlet 9 Float switch (water level change detection) Part)
100 Residual chlorine amount display monitor 200 Water level display monitor Win Sample water (seawater)
Wout discharge test water (seawater)

Claims (2)

A residual chlorine meter with a water level change detection function capable of detecting a water level change of seawater taken as test water through a pipe,
A water detection tank for sending out the seawater flowing in from the pipe at a predetermined flow rate;
A measuring tank for measuring the residual chlorine concentration by flowing in the seawater from the test water tank;
A water level change detection unit that is disposed in the water test tank and detects a water level change of the seawater;
Bei to give a,
The inner diameter of the pipe through which seawater flows into the test tank is set smaller than the inner diameter of the pipe from the test tank to the measurement tank,
Residual chlorine meter with water level change detection function. When the water level change of the seawater detected by the water level change detection unit is a predetermined value or more, the detection result is transmitted to an external device.
The residual chlorine meter with a water level change detection function according to claim 1.

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