JP5905302B2 - Surface deposit measurement device - Google Patents

Description

  The present invention relates to a surface deposit measuring apparatus, and more particularly to a surface deposit measuring apparatus capable of detecting a surface deposit on a measurement object.

  For example, grasping the amount of salt adhering to the surface of a structure such as a tank of a thermal power plant is important in performing subsequent processes, for example, determining whether coating is possible or estimating corrosion progress. It is also necessary for quality control of structures.

In the conventional salt content analysis, for example, after adding distilled water to the gauze, the gauze is applied to the measurement site, the surface salt is wiped off and the salt content is collected on the gauze side, and then the gauze salt content is extracted to obtain a predetermined value. There is a method of measuring with an analyzer. This method has a problem that it takes time to prepare the gauze and the steps of extraction and analysis, and more instruments are used for measurement.
In order to avoid the complexity of the measurement method using gauze as described above, Patent Document 1 discloses a probe for salinity measurement, which can measure the amount of salinity by contacting the surface of the structure. A probe is described.

International Publication No. 2011/115284

  However, the surface deposit measurement apparatus described in Patent Literature 1 has a sensor, a stirrer, and an air vent in the probe, and has a problem that it is difficult to reduce the size. Therefore, it could not be applied to small diameter steel pipes. In addition, since the above-described components are integrated, there is a problem that cleaning is difficult, and an error is likely to occur particularly after a dirty surface is measured.

  The present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a surface deposit measuring apparatus that can measure a narrower measuring object by downsizing the probe. It is in.

In order to solve the above problems, the present invention provides the following means.
The surface deposit measurement apparatus of the present invention is arranged so as to come into contact with the measurement target, elutes the surface deposit on the measurement target into the introduced liquid to form a solution, and a probe for discharging the solution; An analyzer capable of detecting the concentration of the surface deposit in the solution discharged from the probe; and a liquid circulation mechanism for sequentially circulating a liquid between the probe and the analyzer. Is provided at one end of the chamber, and is provided with an analyzer inlet for introducing the solution, an analyzer outlet provided at the other end of the chamber for discharging the solution, A pair of sensors installed on the inner peripheral surface of the chamber so as to face each other at an axial center position, and the analyzer introduction port allows the solution to flow spirally along the inner peripheral surface Way Characterized in that attached.

  According to the above configuration, since the mechanism for circulating the liquid is independent from the probe, the probe can be reduced in size, and a narrower measurement object can be measured. Further, by downsizing the probe, a fixing device for fixing the probe to the measurement object can be simplified.

  According to the above configuration, bubbles flowing into the chamber of the analyzer together with the liquid are likely to gather near the central axis of the chamber, so that the bubbles are less likely to contact the sensor, and the measurement accuracy can be stabilized.

  In the surface deposit measurement apparatus, the liquid circulation mechanism includes a circulation channel through which the liquid circulates, a circulation pump provided on the circulation channel and upstream of the probe, and the circulation pump. A water supply tank that is connected to the circulation flow path via a first branch path provided on the upstream side and stores a liquid, and a second branch path provided between the first branch path and the analyzer A waste liquid tank that is connected to the circulation flow path and contains a solution, a first stop valve provided on the first branch path, a second stop valve provided on the second branch path, It is preferable to have a third stop valve provided on the circulation flow path and between the first branch path and the second branch path.

  According to the above configuration, since the used water can be discharged and fresh water can be continuously supplied, the circulation channel 6 can be cleaned and other points can be measured continuously. It becomes.

In the above surface deposits measuring apparatus, the probe includes a probe body fluid holding chamber for holding the liquid therein has an opening portion is provided at one end, the pre-SL solution body to the liquid holding chamber a liquid supply passage for supplying, it is preferable to have a, and the liquid discharge passage and out discharge said solution from said liquid holding chamber.

  According to the present invention, since the mechanism for circulating the liquid is made independent of the probe, the probe can be miniaturized and a narrower measurement object can be measured. Further, by downsizing the probe, a fixing device for fixing the probe to the measurement object can be simplified.

It is the schematic of the surface deposit measurement apparatus which concerns on 1st embodiment of this invention. It is the schematic of a probe. It is the schematic of an analyzer. It is a flowchart explaining a measuring method. It is a flowchart explaining the washing | cleaning method. It is the schematic of the surface deposit measurement apparatus which concerns on 2nd embodiment of this invention. It is the schematic of the surface deposit | attachment measuring apparatus which concerns on 3rd embodiment of this invention. It is the schematic explaining the effect | action of the surface deposit | attachment measuring apparatus which concerns on 3rd embodiment of this invention, Comprising: It is a figure explaining a surface salt content collection | recovery process. It is the schematic explaining the effect | action of the surface deposit | attachment measuring apparatus which concerns on 3rd embodiment of this invention, Comprising: It is a figure explaining a measurement up and a measurement process. It is the schematic explaining the effect | action of the surface deposit measurement apparatus which concerns on 3rd embodiment of this invention, Comprising: It is a figure explaining a washing | cleaning process. It is the schematic explaining the effect | action of the surface deposit measurement apparatus which concerns on 3rd embodiment of this invention, Comprising: It is a figure explaining a drainage process.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1, the surface deposit measurement apparatus 1 of the present embodiment is a measurement apparatus for salinity adhering to the surface of the measurement target T. The surface deposit measurement apparatus 1 includes a probe 2 disposed so as to be in contact with the measurement target T, a liquid circulation mechanism 4 for circulating water in the liquid holding chamber 3 in the probe 2, and a circulating water. And an analyzer 5 for measuring the electrical conductivity of the salt in the aqueous solution from which the salt is eluted.
The probe 2 is introduced with clean water (distilled water), and the aqueous solution from which the salt content is eluted is discharged. The discharged aqueous solution is sent to the analyzer 5 through the circulation channel 6 of the liquid circulation mechanism 4. is there.

  The liquid circulation mechanism 4 is a mechanism for circulating the liquid between the probe 2 and the analyzer 5 through the circulation channel 6. The circulation flow path 6 includes a first circulation flow path 7 that connects the analyzer discharge port 12 of the analyzer 5 and the liquid supply path 9 of the probe 2, and an analyzer introduction of the liquid discharge path 10 of the probe 2 and the analyzer 5. It consists of a second circulation channel 8 connecting the port 11.

  In the first circulation channel 7, a water supply tank 14 for supplying fresh water to the probe 2, a first pump 15 for circulating the liquid in the circulation channel 6, and an aqueous solution discharged from the analyzer 5 A waste liquid tank 16 to be introduced is provided.

  Specifically, if the upstream side of the first circulation channel 7 is the analyzer 5 side and the downstream side is the probe 2 side, the first circulation channel 7 is provided with a first pump 15 upstream of the probe 2. A first branch path 17 branched from the first circulation path 7 is provided upstream of the first pump 15, and is upstream of the first branch path 17 and between the first branch path 17 and the analyzer 5. A second branch path 18 is provided.

The water supply tank 14 is connected to the first circulation flow path 7 via the first branch path 17, and the waste liquid tank 16 is connected to the first circulation flow path 7 via the second branch path 18.
A first stop valve 19 is provided on the first branch path 17, and water supply from the water supply tank 14 to the first circulation flow path 7 can be controlled. Similarly, a second stop valve 20 is provided on the second branch path 18, and the flow path of the aqueous solution from the first circulation path 7 to the waste liquid tank 16 can be controlled.

Further, a third stop valve 21 is provided on the first circulation channel 7 between the first branch channel 17 and the second branch channel 18, and the first branch channel 17 and the second branch channel are provided. It is possible to control the flow of the circulation channel 6 between the channel 18.
The first stop valve 19, the second stop valve 20, and the third stop valve 21 are open / close valves such as electromagnetic valves, for example.

  The second circulation channel 8 is provided with a second pump 22 for circulating the liquid in the circulation channel 6. In addition, the instrument for circulating the liquid provided in the 2nd circulation flow path 8 is not restricted to an above-described pump, It is also possible to utilize an ejector.

  As shown in FIG. 2, the probe 2 has a substantially cylindrical probe main body 24, and is a part where one end of the probe main body 24 is brought into contact with the measuring object T. Note that the shape of the probe 2 is not limited to a cylindrical shape, and it is sufficient that a surface that contacts the measurement object T can be formed at one end. For example, a box shape or a polygonal column shape may be used.

  The probe main body 24 has a circular opening 25 at one end and a liquid holding chamber 3 for holding a liquid therein. Around the opening 25, an annular seal member 26 for preventing leakage of liquid is attached.

  The probe main body 24 has a liquid supply path 9 for supplying liquid from the other end side of the probe main body 24 to the liquid holding chamber 3 and a liquid discharge for discharging liquid from the liquid holding chamber 3 to the other end side of the probe main body 24. A path 10 is formed. As described above, the liquid supply path 9 is connected to the first circulation flow path 7, and the liquid discharge path 10 is connected to the second circulation flow path 8.

  The analyzer 5 is a so-called flow cell (also called a flow cytometer or flow cytometry), and is an analyzer that can measure the electrical conductivity of the circulating liquid. As shown in FIG. 3, the analyzer 5 has a cylindrical chamber 28 and a pair of sensors 29, and measures the liquid circulating in the chamber 28 with the pair of sensors.

  The pair of sensors 29 are installed on the inner peripheral surface of the chamber 28 so as to face each other at the center position in the axial direction (vertical direction in FIG. 3) of the chamber 28. The pair of sensors 29 are electrical conductivity sensors that can measure the electrical conductivity of the liquid flowing between the sensors 29 and 29, and the pair of sensors 29 are connected to an AC power source (not shown).

  An analyzer inlet 11 for introducing liquid is provided at one axial end of the chamber 28, and an analyzer outlet 12 for discharging liquid is provided at the other axial end of the chamber 28. Specifically, the analyzer introduction port 11 includes a tubular introduction tube 30 and an inclined end surface 31 that is inclined with respect to a surface that is an inner end surface of the chamber 28 and is orthogonal to the axial direction of the chamber 28. Has been. The introduction pipe 30 is oriented so as to introduce the circulating liquid from one axial end side of the chamber 28 in a tangential direction of a circle constituting a cross section perpendicular to the axial direction of the chamber 28.

  Further, the inclined end surface 31 has an inclination that slightly inclines the liquid introduced in the tangential direction of the cross-sectional circle of the chamber 28 upward (on the other end side in the axial direction). That is, the analyzer inlet 11 is configured such that the introduced liquid flows spirally along the inner peripheral surface of the chamber 28. The analyzer discharge port 12 is formed so as to discharge the liquid flowing spirally without any delay.

Next, the effect | action of the surface deposit | attachment measuring apparatus 1 of this embodiment is demonstrated.
First, the probe 2 is fixed to the surface of the measuring object T. The probe 2 can be fixed by pressing the probe 2 with an operator's hand.
Here, since the liquid fed by the first pump 15 is sucked in a balanced manner by the second pump 22, even if the probe 2 moves away from the measuring object T, the liquid is maintained without dripping. 2 can be moved appropriately.

Next, the measurement method will be described with reference to the flowchart of FIG.
(1) First, the first stop valve 19 is opened, and a certain amount of water is supplied from the water supply tank 14 using the first pump 15. The supplied water flows into the first circulation channel 7.

(2) Next, water is supplied to the probe 2 by the first pump 15 and then circulated so as to return to the first pump 15 after passing through the analyzer 5.
Specifically, the water supplied to the probe 2 by the first pump 15 flows into the liquid holding chamber 3 of the probe 2, and the water in the liquid holding chamber 3 contains salt that adheres to the surface of the measurement target T. The deposits are eluted. The aqueous solution from which the deposits are eluted is discharged from the probe 2 and flows into the second circulation channel 8. Further, the aqueous solution passes through the analyzer 5 and flows into the second circulation channel 8. When the entire circulation channel 6 is filled with water, the first stop valve 19 is closed and the first pump 15 and the second pump 22 are operated to circulate water.

  (3) The electrical conductivity output is monitored by the analyzer 5. Monitoring continues until the output stabilizes. The stability of the output is determined based on the standard deviation of a plurality of measured values. The standard deviation value to be set is variable.

  Here, the flow of the liquid flowing into the chamber 28 of the analyzer 5 is introduced from the analyzer introduction port 11 and becomes spiral. Here, the bubbles B are also brought into the chamber 28, but the bubbles B tend to collect near the central axis of the cylindrical chamber 28.

  (4) When the output is stable, the measurement is complete. That is, the salt concentration contained in the aqueous solution can be measured by measuring the electrical conductivity.

Next, with reference to the flowchart of FIG. 5, the washing | cleaning method of the circulation flow path 6 of the surface deposit | attachment measuring apparatus 1 is demonstrated.
(1) Open the first stop valve 19 provided in the first branch passage 17 connecting the water supply tank 14 and the circulation passage 6,
By operating the first pump 15 and supplying water from the water supply tank 14, the measured liquid is pushed out and drained into the waste liquid tank 16. At this time, the second stop valve 20 provided in the second branch path 18 connecting the waste liquid tank 16 and the circulation path 6 is opened, and the gap between the first branch path 17 and the second branch path 18 is set. The third stop valve 21 is closed.

(2) Subsequently, water is supplied from the water supply tank 14 to clean the probe 2 and the analyzer 5. At this time, the waste liquid is drained to the waste liquid tank 16 as needed.
(3) The electrical conductivity output is monitored by the analyzer 5. Monitoring is continued until the output stabilizes at the baseline (electric conductivity value of fresh water).
(4) When the output is stable at the baseline, the cleaning is completed. Water supply from the water supply tank 14 is stopped, and the first stop valve 19 is closed.

  In the case of an abnormality such as at least a part of the circulation channel 6 being blocked by foreign matter, it is possible to reverse the flow of the liquid with a pump and remove the foreign matter.

  According to the above embodiment, the probe 2 can be downsized by making the mechanism for circulating the liquid independent of the probe 2, and a narrower measuring object T can be measured. Further, by downsizing the probe 2, a fixing device for fixing the probe 2 to the measurement object can be simplified.

  Moreover, since the used water can be discharged and fresh water can be continuously supplied, the circulation flow path 6 can be cleaned, and other points can be measured continuously.

  Further, since the bubbles B flowing into the chamber 28 of the analyzer 5 together with the liquid are likely to gather near the central axis of the chamber 28, the bubbles B are less likely to contact the sensor 29, and the measurement accuracy can be stabilized. .

(Second embodiment)
Hereinafter, a second embodiment of a surface deposit measuring apparatus according to the present invention will be described with reference to the drawings.
As shown in FIG. 6, the surface deposit measurement apparatus 1 </ b> B according to the second embodiment enables cleaning between the first branch path 17 and the second branch path 18 on the circulation path 6. A third branch path 33 and a fourth branch path 34 are provided.

  Specifically, the third branch path 33 is between the first stop valve 19 on the first branch path 17 and the water supply tank 14 and upstream of the first pump 15 (downstream side of the first branch path 17). Is a line connecting the two. A fourth stop valve 35 having the same configuration as that of the first stop valve 19 and the like is provided on the third branch path 33.

Further, the fourth branch path 34 has a space between the second stop valve 20 on the second branch path 18 and the waste liquid tank 16, and an upstream side of the third branch path 33 (downstream side of the first branch path 17). It is a line to connect. A fifth stop valve 36 is provided on the fourth branch path 34.
Further, a sixth stop valve 37 is provided on the first circulation flow path 7 between the third branch path 33 and the fourth branch path 34, and the third branch path 33 and the fourth branch path are provided. It is possible to control the flow of the circulation channel 6 between the channel 34.

Next, the operation of the surface deposit measurement apparatus 1B according to this embodiment will be described.
First, cleaning is performed by the same method as the surface deposit measurement apparatus 1 according to the first embodiment. After confirming the cleaning of the circulation flow path 6 except between the first branch path 17 and the second branch path 18, the line is switched.

  Specifically, the first stop valve 19 and the second stop valve 20 are closed, and the third stop valve 21 is opened. Further, the fourth stop valve 35 and the fifth stop valve 36 are closed, and the sixth stop valve 37 is closed. That is, the water supplied from the water supply tank 14 flows into the circulation flow path 6 through the third branch path 33, and is a line (the first line where the probe 2, the analyzer 5, and the third stop valve 21 are provided. A flow is formed so as to be drained into the waste liquid tank 16 via a line between the branch path 17 and the second branch path 18).

  According to the above embodiment, the entire circumference of the circulation flow path 6 can be washed by switching the line by operating the stop valve.

(Third embodiment)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 7, the surface deposit measurement apparatus 1 </ b> C of the present embodiment is a measurement apparatus for the salinity adhering to the surface of the measurement target T. The surface deposit measurement apparatus 1C includes a probe 2 disposed so as to contact the measurement target T, a liquid circulation mechanism 4C for circulating water through the liquid holding chamber 3 in the probe 2, and a salt content in the water. A recovery liquid bottle 40 for storing the eluted aqueous solution, and an electric conductivity meter 41 for measuring the electrical conductivity of salt in the aqueous solution stored in the recovery liquid bottle 40 are provided. The configuration of the probe 2 is the same as in the first embodiment and the second embodiment.

  The liquid circulation mechanism 4C includes a circulation channel 6C, a water supply tank 14 in which fresh water is stored, and a pump 42 for supplying fresh water to the circulation channel 6C. The circulation channel 6 </ b> C connects the first circulation channel 7 </ b> C that connects the bottom of the recovered liquid bottle 40 and the liquid supply path 9 of the probe 2, and the liquid discharge path 10 of the probe 2 and the ceiling of the recovered liquid bottle 40. And a second circulation channel 8C.

  The water supply tank 14 is connected to the branch point 44 of the circulation flow path 6 </ b> C via the branch path 43. The upper part of the recovered liquid bottle 40 and the branch point 44 are connected by a fifth branch 45, and the lower part of the recovered liquid bottle 40 is connected to the second waste liquid line 49.

  The second circulation channel 8C is provided with a compressor 47 and an ejector 48 for circulating the liquid in the circulation channel 6C. A first waste liquid line 46 is branched between the ejector 48 and the recovered liquid bottle 40.

  A seventh stop valve 51 is provided between the branch point 44 and the probe 2 on the first circulating flow path 7C, and an eighth stop valve 52 is provided between the recovered liquid bottle 40 and the branch point. ing. A ninth stop valve 53 is provided on the fifth branch 45, a tenth stop valve 54 is provided on the first waste liquid line 46, and an eleventh stop valve 55 is provided on the second waste liquid line 49.

Next, the operation of the surface deposit measurement apparatus 1C of the present embodiment will be described.
(1) Surface salinity recovery First, the surface salinity of the measuring object T is recovered.
As shown in FIG. 8, among the five stop valves, only the seventh stop valve 51 is opened, the pump 42 is operated, and the probe 2 is supplied from the water supply tank 14 via the branch path 43 and the first circulation path 7C. Supply fresh water to Further, the compressor 47 and the ejector 48 are operated, and the aqueous solution in which salt is eluted in the water is stored in the recovered liquid bottle 40 via the second circulation flow path 8C.

(2) Measuring up and measuring Next, measuring up is performed so that the fresh water in the recovered liquid bottle 40 has a predetermined volume.
At the time of measuring up, as shown in FIG. 9, the seventh stop valve 51 and the eighth stop valve 52 are closed, the ninth stop valve 53 is opened, and the pump 42 is operated. Fresh water is supplied directly to the recovered liquid bottle 40 via the branch 45.
Next, the electric conductivity of the aqueous solution stored in the recovered liquid bottle 40 is measured using an electric conductivity meter 41.

(3) Cleaning Next, the circulation channel 6C is cleaned.
When performing cleaning, as shown in FIG. 10, the seventh stop valve 51, the eighth stop valve 52, and the tenth stop valve 54 are opened, and the remaining stop valves are closed. Next, by operating the pump 42, the circulation channel 6C and the recovered liquid bottle 40 are washed. Waste water is discarded from the first waste liquid line 46.

  Although not shown, the seventh stop valve 51 and the ninth stop valve 53 are closed, the eighth stop valve 52 is opened, and the fresh water in the water supply tank 14 is directed from the branch point 44 toward the collected liquid bottle 40. This section can be cleaned by flowing in a reverse direction.

(4) Drainage Finally, as shown in FIG. 11, only the eleventh stop valve 55 is opened, and the water in the collected liquid bottle 40 is drained through the second waste liquid line 49.

According to the above embodiment, when measuring the aqueous solution stored in the recovered liquid bottle 40, since there is no flow in the aqueous solution, in addition to the electric conductivity meter, another immersion type sensor such as an ion electrode or a pH meter is used. Can be applied. For example, a configuration in which an immersion type electric conductivity meter cell is installed in the recovered liquid bottle 40 can be employed.
Further, the aqueous solution in the collected liquid bottle 40 can be collected and used separately for detailed measurement.

  Moreover, the cleaning range can be reduced as compared with the surface deposit measurement device according to the first embodiment and the surface deposit measurement device according to the second embodiment. That is, since only the fresh water is always supplied in the range between the water supply tank 14 and the probe 2, no cleaning is required.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in each of the embodiments described above, the probe 2 is configured to be pressed against the measurement target T by the operator's hand. However, the present invention is not limited to this, and the probe 2 is applied to the surface of the measurement target T with an adhesive attachment or the like. It may be fixed. Moreover, when the measuring object T is formed of a magnetic material, it can be fixed with an attachment using a magnet.

  Moreover, in each said embodiment, although it was set as the structure which supplies water from the feed water tank connected via the branch furnace using the circulation pump, it does not restrict to this. For example, if a tank having a direct water supply / drainage function is provided in the circulation pump and water can be sent from the circulation pump, the water supply tank and the waste liquid tank can be omitted.

DESCRIPTION OF SYMBOLS 1 Surface deposit measurement apparatus 2 Probe 3 Liquid holding chamber 4 Liquid circulation mechanism 5 Analyzer 6 Circulation flow path 9 Liquid supply path 10 Liquid discharge path 11 Analyzer introduction port 12 Analyzer discharge port 14 Water supply tank 15 First pump (circulation) pump)
16 Waste liquid tank 17 First branch path 18 Second branch path 19 First stop valve 20 Second stop valve 21 Third stop valve 24 Probe body 25 Opening 28 Chamber 29 Sensor T Object to be measured

Claims (3)

A probe that is arranged in contact with the measurement object, elutes the surface deposits of the measurement object into the introduced liquid to form a solution, and discharges the solution;
An analyzer capable of detecting the concentration of the surface deposits in the solution discharged from the probe;
A liquid circulation mechanism for sequentially circulating a liquid between the probe and the analyzer ;
The analyzer is
A cylindrical chamber;
An analyzer inlet provided at one end of the chamber for introducing the solution;
An analyzer outlet provided at the other end of the chamber for discharging the solution;
A pair of sensors installed on the inner peripheral surface of the chamber so as to face each other at the axial center position of the chamber;
The apparatus for measuring surface deposits , wherein the analyzer inlet is oriented so that the solution flows spirally along an inner peripheral surface . The liquid circulation mechanism is
A circulation path through which the liquid circulates;
A circulation pump provided on the circulation flow path and upstream of the probe;
A water supply tank that is connected to the circulation flow path via a first branch path provided on the upstream side of the circulation pump, and that contains a liquid;
A waste liquid tank connected to the circulation flow path via a second branch path provided between the first branch path and the analyzer, and containing a solution;
A first stop valve provided on the first branch path;
A second stop valve provided on the second branch path;
Wherein a circulation flow path, the surface deposit measuring device according to claim 1, characterized in that it comprises a and a third check valve disposed between the first minute branch and the second minute branch. The probe is
A probe body having an opening at one end and a liquid holding chamber for holding the liquid inside;
A liquid supply passage for supplying the pre-SL solution body to the liquid holding chamber,
Surface deposits measuring device according to claim 1 or claim 2 and having a liquid discharge passage for exiting discharge said solution from said liquid holding chamber.

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