KR102428562B1 - pH measuring device with pH sensor cleaning and calibration system - Google Patents

Abstract

Provided is a pH measuring device with a pH sensor cleaning and calibration system, wherein a sensor unit (100) of a pH sensor device according to the present invention comprises: a chamber (200) which can clean contaminants of a pH detection unit (110) and can perform calibration; and a moving device (300) which can move the pH detection unit (110) in and out of the chamber (200). The pH detection unit (110) may be moved from the outside of the chamber (200) to the inside of the chamber (200) by means of the moving device (300) to clean the contaminants of the pH detection unit (110) by using a cleaning solution and pressurized air. The pH measuring device further comprises: a spray cleaning unit (210) which is provided at the lower side of the chamber (200) to spray the compressed air and the cleaning solution to the pH detection unit (110); and a cleaning solution cleaning unit (220) which is provided at the upper side of the chamber (200) to clean the pH detection unit (110) which is cleaned in the spray cleaning unit (210) by means of the cleaning solution. The pH detection unit (110) is sequentially moved from the outside of the chamber (200) to the spray cleaning unit (210) and the cleaning solution cleaning unit (220) by means of the moving device (300). Therefore, the pH sensor may be cleaned and calibrated.

Description

pH measuring device with pH sensor cleaning and calibration system

The present invention relates to a pH measuring device having a pH sensor cleaning and calibration system, and more particularly, in order to remove contaminants adhering to the surface of the pH sensor,

Before the pH sensor is introduced into the washing chamber, it is first washed using a cleaning solution and pressurized air. It relates to a pH sensor device having a calibration system capable of calibrating the sensor.

In general, measurement of pH in various fields such as chemistry, semiconductor, environment, and medicine is a basic analysis item, and a pH sensor for measuring it is used.

In order to measure the pH, the pH sensor must be exposed to the reaction carrier. Therefore, contaminants are attached to the surface of the pH sensor by the reaction carrier. Depending on the contaminants attached to the surface of the pH sensor, that is, the surface contamination of the pH sensor, malfunctions and inactivation problems of the pH sensor occur, requiring periodic cleaning and replacement of the sensor. Moreover, the surface contamination of the pH sensor has a problem that it is difficult to remove because it becomes more and more fixed as time goes by.

In particular, in sewage and wastewater treatment facilities, the environment in which the pH sensor is used is harsh, and the degree of inactivity due to contamination of the pH sensor is high, and various methods have been tried in the field to solve this problem.

The method to remove contaminants is to spray high-pressure air and sulfuric acid solution on the lower side of the pH sensor and automatically clean it with a brush. This method has a problem that not only the cleaning efficiency is lowered, but also the accuracy of the pH sensor when spraying sulfuric acid to dissolve contaminants is lowered, so that it must be corrected immediately. In addition, since high-pressure air and sulfuric acid solution are sprayed only to the lower side of the sensor and automatically cleaned, there is a problem in that contaminants are continuously fixed to the body of the pH sensor.

In order to improve this problem, it is a method of removing contaminants by attaching ultrasonic waves to the lower part of the sensor. Although the adhesion of contaminants is reduced in the beginning, there is another problem that contaminants are fixed to the surface as time passes, and it is difficult to remove contaminants as the distance from the lower part of the sensor is increased.

Therefore, there is a need for a new method capable of improving these conventional methods and further automatically cleaning the pH sensor as well as calibrating it.

Korean Patent Publication No. 10-2248985 Korean Patent Publication No. 10-2021-0014352

Therefore, the present invention has been devised to solve the problems of the prior art as described above, and periodically before contaminants are fixed on the surface of the pH sensor used in sewage and wastewater treatment facilities, the environment, medicine, semiconductor facilities, etc. It is possible to clean the surface of the and further to provide a calibration system capable of calibrating the cleaned pH sensor.

On the other hand, other objects not specified in the present invention will be further considered within the range that can be easily inferred from the following detailed description and effects thereof.

The sensor unit 100 of the pH sensor device of the present invention for achieving the above object includes a chamber 200 capable of cleaning and correcting contaminants of the pH sensing unit 110, and the chamber 200. A moving device 300 capable of moving the pH sensing unit 110 in and out is provided,

The pH sensor cleaning and the cleaning and the A pH measuring device equipped with a calibration system shall be used.

To explain this in more detail, the chamber 200 includes a spray cleaning unit 210 that simultaneously sprays compressed air and a cleaning liquid to the pH sensing unit 110 on the lower side, and the spray cleaning unit 210 on the upper side ) and a cleaning solution washing unit 220 for secondarily washing the pH sensing unit 110 with a washing solution, and the pH sensing unit 110 is a chamber 200 by the moving device 300 . The spray washing unit 210 and the washing liquid washing unit 220 are sequentially moved from the outside.

In addition, the sensor guide 120 of the pH sensing unit 110 of the cylindrical shape is inserted into the center of the chamber outer cylinder 230 in the chamber 200, and the sensor guide is inside the chamber outer cylinder 230. A chamber inner tube 250 having a space portion 240 of a certain size on the outer peripheral surface 130 of 120, and the upper and lower portions of the chamber inner tube 250, the inner side of the chamber outer tube 230 and a sensor guide ( The upper O-ring part 310 and the lower O-ring part 320 into which an O-ring for preventing leakage is inserted between the outer circumferential surface 130 of 120 and the lower side of the lower O-ring part 320 have a lower diameter than the upper diameter. It is formed large and consists of a spray cleaning unit 210 made of a conical shape having an inclined surface (260).

And a spiral cleaning liquid moving groove 270 is formed inside the chamber inner tube 250, and in the cleaning liquid moving groove 270, the cleaning liquid injection hole 280 is in contact with the outer peripheral surface 130 of the sensor guide 120. It is provided so that a vortex can be formed while the cleaning liquid is moved upward.

In addition, a plurality of injection holes 290 are provided on the inclined surface 260 of the spray cleaning unit 210 at regular intervals, and compressed air and cleaning liquid are sprayed through the plurality of injection holes 290 to the pH sensing unit 110 . ) is formed to wash contaminants of

In addition, at the end of the sensor guide 120 provided with the pH sensing unit 110, the lower diameter is formed larger than the upper diameter so as to be in close contact with the inclined surface 260 of the spray washing unit 210. It is formed in a conical shape having an inclined surface 140 so that when the pH sensing unit 110 moves to the inside of the chamber inner tube 250, the chamber inner tube 250 can be sealed.

The pH sensing unit 110 is configured to be calibrated by introducing a calibration solution into the chamber inner tube 250 after the cleaning liquid is washed inside the chamber inner tube 250 .

In addition, the pH measuring device includes a control unit 400, and the control unit 400 flows out the pH sensing unit 110 to the outside of the chamber inner tube 250 according to an external control signal to measure the pH. After the process and the first process, the pH sensing unit 110 is moved and maintained at a predetermined distance from the inclined surface 260 of the spray washing unit 210, and then compressed air and a cleaning solution are sprayed into the pH sensing unit 110. A second process of washing contaminants, a third process of washing the cleaning liquid after the pH sensing unit 110 moves to the inside of the chamber inner tube 250 after the second process, and the third process after the third process 250) It is provided so that the fourth process of calibrating by introducing the calibrating solution to the inside can be sequentially performed.

In addition, after the fourth process, a fifth process of removing the calibration solution by introducing pressurized air into the chamber inner tube 250 may be added.

The pH measuring device having a pH sensor cleaning and calibration system of the present invention is cleaned by spraying compressed air and a cleaning solution before contaminants are fixed on the surface of the pH sensor used in sewage and wastewater treatment facilities, environment, medicine, semiconductor facilities, etc. The advantage of being able to clean the surface of the pH sensor through spray cleaning and immersion cleaning in which the surface of the pH sensor is immersed in a cleaning solution, and furthermore, to improve the measurement reliability of the pH sensor device by calibrating the cleaned pH sensor There is this.

In addition, the pH measuring device having the pH sensor cleaning and calibration system of the present invention can be stored in a sealed state by moving the pH sensor 110 to the inside of the chamber 200 when the pH sensor is not used, thereby improving durability. There are benefits that can be improved.

And the pH measuring device having the pH sensor cleaning and calibration system of the present invention includes an automated control unit to automate the calibration process of spray cleaning, immersion cleaning and calibrating the washed pH sensor, thereby reducing cost and labor costs. There are advantages to doing.

1 is a schematic cross-sectional view for explaining a pH measuring device having a pH sensor cleaning and calibration system according to the present invention.
Figure 2 is a schematic cross-sectional view of the spray cleaning unit for spraying the compressed air and the cleaning liquid at the same time of the present invention.
3 is a vertical sectional view of a chamber 200 capable of cleaning and calibrating the pH sensor according to the present invention.
4 is a configuration diagram of a pH measuring device having a pH sensor cleaning and calibration system according to the present invention.

Hereinafter, a pH measuring device having a pH sensor cleaning and calibration system according to the present invention will be described in detail with reference to the accompanying drawings.

In the following description, only the parts necessary for understanding the pH measuring device having the pH sensor cleaning and calibration system according to the embodiment of the present invention will be described, and the description of other parts may be omitted so as not to obscure the gist of the present invention. .

In addition, the terms or words used in the present specification and claims described below should not be construed as being limited to conventional or dictionary meanings, and meanings consistent with the technical spirit of the present invention so that the present invention can be most appropriately expressed. and should be interpreted as a concept.

Throughout the specification, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated. In addition, terms such as "... unit" and "... group" described in the specification mean a unit for processing at least one function or operation.

In various embodiments, components having the same configuration will be described by using the same reference numerals to representatively describe the configuration of the embodiment.

1 is a schematic cross-sectional view for explaining a pH measuring device having a pH sensor cleaning and calibration system according to the present invention.

A pH measuring device having a pH sensor cleaning and calibration system according to the present invention comprises: a sensor unit 100 of a pH sensor device including a pH sensor pH sensing unit 110 for measuring pH;

A chamber 200 capable of cleaning and correcting contaminants of the pH sensing unit 110, and a moving device 300 capable of moving the pH sensing unit 110 in and out of the chamber 200 There is provision.

The mobile device 300 has a configuration capable of reciprocating a predetermined distance by a control signal using a conventional air cylinder or the like.

The pH is measured in a state in which the pH sensing unit 110 protrudes to the outside of the chamber 200 by the moving device 300 inside the fixed chamber 200,

The pH sensing unit 110 is contaminated by the pH measurement, or in order to keep it in a dormant state, the pH sensing unit 110 moves from the outside of the chamber 200 to the inside,

A process of washing contaminants using a cleaning solution and pressurized air while the pH sensing unit 110 moves from the outside to the inside of the chamber 200, calibrating the washed pH sensor, and then the pH sensing unit 110 ) as a pH measuring device equipped with a pH sensor cleaning and calibration system, characterized in that it can be rested in a ready-to-use state.

To explain this in more detail, the expression of the position is described with reference to the drawings,

2 is a schematic cross-sectional view of a spray cleaning unit that simultaneously sprays compressed air and a cleaning solution of the present invention, and FIG. 3 is a vertical cross-sectional view of a chamber 200 capable of cleaning and correcting the pH sensor according to the present invention, 4 is a description with reference to the operation configuration of the pH measuring device having a pH sensor cleaning and calibration system according to the present invention.

The chamber (chamber; 200), the lower side of the spray cleaning unit 210 that simultaneously sprays compressed air and the cleaning liquid to the pH sensing unit 110, and the upper side, the pH sensing unit washed by the spray washing unit 210 A cleaning liquid cleaning unit 220 for secondarily cleaning the unit 110 with a cleaning liquid is provided.

In addition, the pH sensing unit 110 sequentially moves to the spray washing unit 210 and the washing liquid washing unit 220 while moving from the lower part of the chamber 200 to the upper side by the moving device 300 .

In addition, the chamber (chamber; 200) is a cylindrical chamber outer cylinder 230, the sensor guide 120 of the cylindrical shape of the pH sensor 110 is inserted into the center, and the sensor guide 120 at one end of the The moving device 300 is attached, and the pH sensing unit 110 also moves by the movement of the sensor guide 120 .

An inner chamber inner tube 250 having a space portion 240 of a predetermined size is provided on the outer peripheral surface 130 of the sensor guide 120 inside the chamber outer tube 230 .

That is, the inner diameter of the chamber inner tube 250 is formed larger than the outer diameter of the sensor guide 120, and a space portion 240 is provided between the outer peripheral surface 130 of the sensor guide 120 and the inner diameter surface of the chamber inner tube 250, and , the process of washing contaminants, calibrating the washed pH sensor, and then in a resting state in which the pH sensing unit 110 can be used immediately, the pH sensing unit 110 is the space of the chamber inner tube 250 It is located in the unit 240 .

As described above, as the sensor guide 120 reciprocates in the chamber inner tube 250, the upper and lower portions of the chamber inner tube 250 are located between the inner side of the chamber outer tube 230 and the outer peripheral surface 130 of the sensor guide 120. The upper O-ring part 310 and the lower O-ring part 320 into which the O-ring to prevent leakage is inserted, and the lower side of the lower O-ring part 320 is formed with a lower diameter larger than the upper diameter, and has an inclined surface 260. It consists of a spray cleaning unit 210 made of a cone.

In addition, the lower end of the sensor guide 120 provided with the pH sensing unit 110 has a lower diameter than the upper diameter so as to be in close contact with the inclined surface 260 of the spray cleaning unit 210 . and has a conical shape having an inclined surface 140 and when the pH sensing unit 110 moves to the inside of the chamber inner tube 250, the inclined surface 260 of the chamber inner tube 250 and the inclined surface 140 of the sensor guide 120 The abutment is made to be in surface contact, and is formed to be sealed by the contact surface.

As such, when the inclined surface 140 of the sensor guide 120 formed at the end of the sensor guide 120 is moved toward the inclined surface 260 of the chamber inner tube 250 by the moving device 300, the inclined surface of the chamber inner tube 250 ( 260) and the inclined surface 140 of the sensor guide 120 are in contact with each other to form a valve that makes surface contact, so that the chamber inner cylinder 250 is sealed.

In addition, looking at the spray washing unit 210 and the washing liquid washing unit 220 made in the chamber 200,

The cleaning liquid cleaning unit 220 has a spiral cleaning liquid moving groove 270 formed inside the chamber inner cylinder 250, and the portion in contact with the outer peripheral surface 130 of the sensor guide 120 in the cleaning liquid moving groove 270 The cleaning liquid injection port 280 is provided in the cleaning liquid is formed so that a vortex can be formed as the cleaning liquid moves upward.

That is, the second supply port 420 is provided so as to supply air, cleaning solution, and calibration solution from the outside of the chamber 200 and is connected to the lower side of the spiral cleaning solution moving groove 270 of the chamber inner tube 250 . , while moving upward along the cleaning liquid moving groove 270, it is sprayed to the pH sensing unit 110 inside the sensor guide 120 through the cleaning liquid injection hole 280, and as the sprayed cleaning liquid moves upward, a vortex is formed. The contaminants are washed, and the washed cleaning solution is discharged to the outside through the outlet 430 connected to one end of the cleaning solution moving groove 270 .

In addition, the pH sensing unit 110 washed with the cleaning solution is calibrated by sequentially supplying the calibration solution after being re-washed with hot water into the chamber 200 .

The process of re-cleaning with the hot water may be omitted.

In addition, if necessary, after the calibration, air may be supplied to maintain the pH sensor 110 in a resting state after drying.

In addition, if necessary, the supply order of the air, hot water, cleaning solution, and calibration solution may be changed, and the supply frequency may be adjusted or replaced with an equivalent.

In addition, looking at the spray cleaning unit 210, a plurality of injection holes 290 are provided at regular intervals on the inclined surface 260 of the lower side of the chamber inner tube 250, and the injection holes 290 are first supplied from the outside. Compressed air and hot water, which is a cleaning liquid, are supplied to the supply port 410 .

As described above, the compressed air and the cleaning liquid are sprayed through the plurality of injection ports 290 connected to the first supply port 410 .

At the end of the sensor guide 120 provided with the pH sensing unit 110 , the lower diameter is formed larger than the upper diameter to correspond to the inclined surface 260 of the spray washing unit 210 , and the inclined surface 140 is provided. Compressed air and a cleaning liquid, which are formed in a conical shape and injected through a plurality of injection holes 290 , wash the contaminants of the inclined surface 140 of the sensor guide 120 and the pH sensor 110 .

After washing the contaminants of the inclined surface 140 of the sensor guide 120 and the pH sensing unit 110 as described above, the inclined surface 140 of the sensor guide 120 provided with the pH sensing unit 110 is formed in the chamber inner tube (250). ) while moving inward, the inclined surface 260 of the chamber inner tube 250 and the inclined surface 140 of the sensor guide 120 come into surface contact, so that the pH sensor 110 is blocked from the outside in the chamber inner tube 250 and sealed do.

In addition, the pH measuring device includes a control unit 400, and the control unit 400 causes the pH sensing unit 110 to come out to the outside of the chamber inner tube 250 by an external control signal to measure the pH. 1 process,

After the first process, the pH sensing unit 110 moves and maintains a certain distance from the inclined surface 260 of the spray washing unit 210, and then compressed air and cleaning liquid are sprayed to remove the contaminants of the pH sensing unit 110. A second process of washing, a third process of washing the cleaning solution after the pH sensing unit 110 moves to the inside of the chamber inner tube 250 after the second process, and the inner chamber of the chamber inner tube 250 after the third process It is provided so that the fourth process of calibrating by introducing the calibrating solution can be sequentially performed.

In addition, after the fourth process, a fifth process of removing the calibration solution by introducing pressurized air into the chamber inner tube 250 may be added.

4 is a configuration diagram in which the sensor unit and the external configuration of the pH measuring device having the pH sensor cleaning and calibration system according to the present invention are connected.

Pressurized air is supplied to the air cylinder which is the moving device 300 so as to move a predetermined distance according to a control signal.

The pH sensor 110 is connected to an external transmitter, and the second supply port 420 connected to the chamber 200 is formed to supply air, a cleaning solution, and a calibration solution.

In addition, the first supply port 410 is supplied with compressed air and hot water as a cleaning liquid through a plurality of injection holes 290 at regular intervals on the inclined surface 260 of the lower side of the chamber inner tube 250 .

Although the present invention has been described in detail through specific examples, this is for the purpose of describing the present invention in detail, and the present invention is not limited thereto, and by those of ordinary skill in the art within the technical spirit of the present invention. It is clear that the modification or improvement is possible.

All simple modifications and variations of the present invention fall within the scope of the present invention, and the specific protection scope of the present invention will be clarified by the appended claims.

100: sensor unit 110: pH sensing unit
120: sensor guide 130: sensor guide outer peripheral surface
140: slope 200: chamber (chamber)
210: spray washing unit 220: washing liquid washing unit
230: chamber outer cylinder 240: space part
250: chamber inner tube 260: slope
270: cleaning liquid moving groove 280: cleaning liquid injection port
290: nozzle 300: moving device
310: upper o-ring part 320: lower o-ring part
410: first supply port 420: second supply port
430: outlet

Claims (5)

The sensor unit 100 of the pH sensor device includes a chamber 200 capable of cleaning and correcting contaminants of the pH sensing unit 110, and the pH sensing unit 110 into and out of the chamber 200. Provided with a movable device 300 that can move,
Contaminants of the pH sensing unit 110 by using the cleaning liquid and pressurized air while the pH sensing unit 110 moves from the outside of the chamber 200 to the inside of the chamber 200 by the moving device 300 It is made to be washed,
In addition, a spray cleaning unit 210 for spraying compressed air and a cleaning solution to the pH sensing unit 110 on the lower side of the chamber 200 and,
A washing liquid washing unit 220 for washing the pH sensing unit 110 washed in the spray washing unit 210 with a washing solution is provided on the upper side of the chamber 200,
The pH sensing unit 110 sequentially moves from the outside of the chamber 200 to the spray washing unit 210 and the washing liquid washing unit 220 by the moving device 300 ,
The chamber (chamber; 200) is
The sensor guide 120 of the pH sensor 110 having a cylindrical shape is inserted into the center of the cylindrical outer cylinder 230,
A chamber inner tube 250 having a space portion 240 of a predetermined size on the outer peripheral surface 130 of the sensor guide 120 inside the chamber outer tube 230,
An upper O-ring portion 310 and a lower O-ring portion 320 into which an O-ring for preventing leakage is inserted between the inner side of the chamber inner tube 250 and the outer peripheral surface 130 of the sensor guide 120 in the upper and lower portions of the chamber inner tube 250 ) is provided,
A pH sensor cleaning and calibration system, characterized in that the lower side of the lower O-ring part 320 is formed with a larger diameter than the upper diameter, and a spray washing part 210 having a conical shape having an inclined surface 260. A pH measuring device. According to claim 1,
A spiral cleaning liquid moving groove 270 is formed on the inner side of the chamber inner cylinder 250,
A second supply port 420 is provided in the cleaning solution moving groove 270 to supply air or cleaning or calibration solution from the outside of the chamber 200,
A cleaning liquid injection hole 280 is provided at a portion in contact with the outer peripheral surface 130 of the sensor guide 120 in the cleaning liquid moving groove 270 so that a vortex can be formed while the cleaning liquid moves upward,
A pH measuring device having a pH sensor cleaning and calibration system, characterized in that it is discharged to the outside through an outlet 430 connected to one end of the cleaning liquid moving groove 270. According to claim 1,
A plurality of injection holes 290 at regular intervals are provided on the inclined surface 260 of the spray cleaning unit 210,
A pH measuring device having a pH sensor cleaning and calibration system, characterized in that it is formed so that compressed air and a cleaning liquid are sprayed through the plurality of injection holes (290) to wash contaminants of the pH sensing unit (110). According to claim 1,
At the end of the sensor guide 120 provided with the pH sensing unit 110, the lower diameter is formed to be larger than the upper diameter so as to be in contact with the inclined surface 260 of the spray washing unit 210 and to be in close contact with the inclined surface ( 140), and when the pH sensing unit 110 moves inside the chamber inner tube 250, the inclined surface 260 of the chamber inner tube 250 and the inclined surface 140 of the sensor guide 120 are in contact. A pH measuring device having a pH sensor cleaning and calibration system, characterized in that the surface contact is made so that the pH sensing unit 110 is formed to be blocked and sealed from the outside in the chamber inner tube (250).
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