CN215985957U - PH value on-line measuring device with self-cleaning function - Google Patents
PH value on-line measuring device with self-cleaning function Download PDFInfo
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- CN215985957U CN215985957U CN202122010694.5U CN202122010694U CN215985957U CN 215985957 U CN215985957 U CN 215985957U CN 202122010694 U CN202122010694 U CN 202122010694U CN 215985957 U CN215985957 U CN 215985957U
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Abstract
The utility model provides a pH value online measuring device with an automatic cleaning function, which comprises a pH meter, a pH meter fixing protective sleeve, a cleaning device and a PLC control system and is characterized in that a pressurizing and heating device, a pressure transmitter, a first manual valve, a one-way valve and an electromagnetic valve are sequentially arranged on a main pipeline of the cleaning device along the flowing direction of cleaning liquid, the tail end of the cleaning device comprises two branch pipes, one of the branch pipes is provided with a second manual valve and an inner nozzle, the inner nozzle on the branch pipe is inserted into the liquid pipeline to be measured from the lower part of the liquid pipeline to be measured, the other branch pipe is provided with a third manual valve and an outer nozzle, and the branch pipe is arranged outside the liquid pipeline to be measured. Through the scheme, the probe of the pH meter is internally cleaned and externally cleaned, and the accuracy of long-time online measurement of the pH meter and convenience in operation and maintenance are guaranteed.
Description
Technical Field
The utility model relates to the technical field of measuring equipment, in particular to a pH value online measuring device with an automatic cleaning function.
Background
The pH meter is a commonly used instrument and equipment, is mainly used for precisely measuring the pH value of a liquid medium, can also measure the potential MV value of an ion electrode by matching with a corresponding ion selection electrode, and is widely applied to the fields of environmental protection, sewage treatment, scientific research, pharmacy, fermentation, chemical engineering, cultivation, tap water and the like.
In the industrial product production process, the pH value control of the solution plays a critical role in the yield and quality of the product. Usually, during production, a pH meter is used for measuring the pH value of the solution on line, so as to determine whether the pH value of the solution is normal or not and ensure the yield and quality of the product.
In the production process of fine chemistry industry, some solutions are particularly viscous and are easy to stick and block a probe of a pH meter, so that the pH value of the solution is measured inaccurately, the yield and the quality of a product are further influenced, and the current pH meter does not have an automatic cleaning function or has a poor cleaning effect. Therefore, it is crucial to design an online pH measuring device with efficient automatic cleaning function.
SUMMERY OF THE UTILITY MODEL
The utility model provides a pH value online measuring device with an automatic cleaning function, which is characterized in that cleaning devices are arranged inside and outside a liquid pipeline to be measured, and a mode of spraying cleaning liquid or cleaning gas by the cleaning devices inside and outside the liquid pipeline to be measured is adaptively selected according to the requirements of actual working conditions to periodically clean a probe of a pH meter, so that the problem that the probe of the pH meter is easily blocked by viscous solution in the online measuring process of the pH meter is solved, and the accuracy of long-time continuous online measurement of the pH meter is ensured.
The embodiment of the utility model provides a pH value online measuring device with an automatic cleaning function, which comprises a pH meter, a pH meter fixing protective sleeve, a cleaning device and a PLC control system and is characterized in that a pressurizing and heating device, a pressure transmitter, a first manual valve, a one-way valve and an electromagnetic valve are sequentially arranged on a main pipeline of the cleaning device along the flowing direction of cleaning liquid, the tail end of the cleaning device comprises two branch pipes, wherein one branch pipe is provided with a second manual valve and an inner nozzle, the inner nozzle on the branch pipe is inserted into the liquid pipeline to be measured from the lower part of the liquid pipeline to be measured, the other branch pipe is provided with a third manual valve and an outer nozzle, and the branch pipe is arranged outside the liquid pipeline to be measured;
the pH meter is used for measuring the pH value of the liquid to be measured in the liquid pipeline to be measured;
the pH meter fixing protective sleeve is of a tubular structure, the inner diameter of the pH meter fixing protective sleeve is larger than the outer diameter of the pH meter, a ball valve is arranged at the upper part of the pH meter fixing protective sleeve, a plurality of U-shaped liquid through hole gaps are formed in the bottom of the pH meter fixing protective sleeve, the lower part of the pH meter fixing protective sleeve is inserted into the liquid pipeline to be measured from the upper part of the liquid pipeline to be measured, and the lower end of the pH meter fixing protective sleeve is positioned above the inner nozzle;
the cleaning device is used for conveying cleaning liquid or cleaning gas to clean the pH meter probe under the control of the PLC control system;
the pressurizing and heating device is used for heating and pressurizing the cleaning liquid or the cleaning gas;
the pressure transmitter is used for measuring the pressure in the cleaning device;
the inner nozzle is used for cleaning the pH meter probe in the liquid pipeline to be measured;
the outer nozzle is used for maintaining, cleaning and verifying the pH meter probe outside the liquid pipeline to be tested during maintenance and verification;
the PLC control system is connected with the pH meter, the pressurizing and heating device, the pressure transmitter and the electromagnetic valve and is used for controlling the working mode of the pH meter, controlling the pressurizing and heating device to heat and pressurize cleaning liquid or cleaning gas and controlling the pressure transmitter to measure the pressure in the cleaning device and control the opening and closing state of the electromagnetic valve and also used for processing the measurement data of the pH meter and the pressure transmitter.
In a preferred technical scheme, when a pH meter is used for measuring the pH value of the liquid to be measured in the liquid pipeline to be measured, the ball valve is opened, the first manual valve, the electromagnetic valve, the second manual valve and the third manual valve are all in a closed state, the pH meter probe is axially inserted into the liquid pipeline to be measured along the pH meter fixing protective sleeve, and the pH meter is used for measuring the pH value of the liquid to be measured flowing through the pH meter probe.
In a preferred embodiment, when the pH meter probe is cleaned inside the liquid pipe to be measured, the first manual valve, the electromagnetic valve, and the second manual valve are in an open state, and the third manual valve is in a closed state, the cleaning device delivers the cleaning liquid to the inner nozzle under the action of the pressurizing and heating device, and the inner nozzle cleans the pH meter probe from below the pH meter probe.
In a preferred technical scheme, when the pH meter probe is cleaned outside the liquid pipeline to be measured, the pH meter probe is axially pulled out of the liquid pipeline to be measured along the pH meter fixing protective sleeve, the pH meter probe is moved to the outer nozzle, the ball valve is closed, the first manual valve, the electromagnetic valve and the third manual valve are in an open state, the second manual valve is in a closed state, the cleaning device conveys cleaning liquid or cleaning gas to the outer nozzle under the action of the pressurizing and heating device, and the outer nozzle sprays the cleaning liquid or the cleaning gas to clean the pH meter probe.
In a preferred technical scheme, a state indicator lamp is arranged on the PLC control system.
The technical personnel in the field can understand that the online pH value measuring device with the automatic cleaning function, provided by the embodiment of the utility model, comprises a pH meter, a pH meter fixing protective sleeve, a cleaning device and a PLC control system, and is characterized in that a pressurizing and heating device, a pressure transmitter, a first manual valve, a one-way valve and an electromagnetic valve are sequentially arranged on a main pipeline of the cleaning device along the flowing direction of cleaning liquid, the tail end of the cleaning device comprises two branch pipes, wherein one branch pipe is provided with a second manual valve and an inner nozzle, the inner nozzle on the branch pipe is inserted into the liquid pipeline to be measured from the lower part of the liquid pipeline to be measured, the other branch pipe is provided with a third manual valve and an outer nozzle, and the branch pipe is arranged outside the liquid pipeline to be measured; the pH meter is used for measuring the pH value of the liquid to be measured in the liquid pipeline to be measured; the pH meter fixing protective sleeve is of a tubular structure, the inner diameter of the pH meter fixing protective sleeve is larger than the outer diameter of the pH meter, a ball valve is arranged at the upper part of the pH meter fixing protective sleeve, a plurality of U-shaped liquid through hole gaps are formed in the bottom of the pH meter fixing protective sleeve, the lower part of the pH meter fixing protective sleeve is inserted into the liquid pipeline to be measured from the upper part of the liquid pipeline to be measured, and the lower end of the pH meter fixing protective sleeve is positioned above the inner nozzle; the cleaning device is used for conveying cleaning liquid or cleaning gas; the pressurizing and heating device is used for heating and pressurizing the cleaning liquid or the cleaning gas; the pressure transmitter is used for measuring the pressure in the cleaning device; the inner nozzle is used for cleaning the pH meter probe in the liquid pipeline to be measured; the outer nozzle is used for maintaining, cleaning and verifying the pH meter probe outside the liquid pipeline to be tested during maintenance and verification; the PLC control system is connected with the pH meter, the pressurizing and heating device, the pressure transmitter and the electromagnetic valve, so that the problem that a viscous solution is easy to block a probe of the pH meter in the online measurement process of the pH meter is solved, the probe of the pH meter is automatically cleaned, and the accuracy of long-time online measurement of the pH meter is ensured.
Drawings
An embodiment of the pH on-line measuring device with an automatic cleaning function according to the present invention will be described with reference to the accompanying drawings. The attached drawings are as follows:
fig. 1 is a schematic structural diagram of an online pH value measuring device with an automatic cleaning function according to an embodiment of the present invention.
Description of reference numerals:
1: a pH meter;
2: a pH meter fixing protective sleeve;
3: a cleaning device;
4: a PLC control system;
5: a pressurizing and heating device;
6: a pressure transmitter;
7: a first manual valve;
8: a one-way valve;
9: an electromagnetic valve;
10: a second manual valve;
11: a third manual valve;
12: a ball valve;
13: an inner nozzle;
14: and an outer nozzle.
Detailed Description
First, it should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications.
Next, it should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "inside", "outside", and the like are based on the direction or positional relationship shown in the drawings, which are merely for convenience of description, and do not indicate or imply that a device or a member must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In order to solve the problem of automatic cleaning of the pH meter during online measurement, the inventor researches and discovers that when the pH value is measured online, if the probe of the pH meter needs to be cleaned, a pressurizing and heating device and a valve on a cleaning device are controlled to convey cleaning liquid or cleaning gas to a nozzle, and the nozzle sprays high-pressure cleaning liquid or cleaning gas to the probe of the pH meter, so that cleaning of viscous solution on the probe of the pH meter is realized, and the accuracy of long-time online measurement of the pH meter is ensured.
The following explains a preferred technical scheme of the pH value on-line measuring device with the automatic cleaning function according to the embodiment of the utility model.
As shown in fig. 1, an embodiment of the present invention provides an online pH value measuring device with an automatic cleaning function, which includes a pH meter 1, a pH meter fixing protective sleeve 2, a cleaning device 3, and a PLC control system 4, and is characterized in that a main pipe of the cleaning device is sequentially provided with a pressurizing and heating device 5, a pressure transmitter 6, a first manual valve 7, a one-way valve 8, and an electromagnetic valve 9 along a flowing direction of a cleaning solution, a terminal of the cleaning device includes two branch pipes, one of the branch pipes is provided with a second manual valve 10 and an inner nozzle 13, the inner nozzle 13 is inserted into a pipe to be measured from below the pipe to be measured, and the other branch pipe is provided with a third manual valve 11 and an outer nozzle 14 and is arranged outside the pipe to be measured;
the pH meter 1 is used for measuring the pH value of the liquid to be measured in the liquid pipeline to be measured;
the pH meter fixing and protecting sleeve 2 is of a tubular structure, the inner diameter of the pH meter fixing and protecting sleeve is larger than the outer diameter of a pH meter, a ball valve 12 is arranged at the upper part of the pH meter fixing and protecting sleeve 2, a plurality of U-shaped liquid through hole gaps are formed in the bottom of the pH meter fixing and protecting sleeve 2, the lower part of the pH meter fixing and protecting sleeve 2 is inserted into a liquid pipeline to be measured from the upper part of the liquid pipeline to be measured, and the lower end of the pH meter fixing and protecting sleeve 2 is positioned above the inner nozzle 13;
the cleaning device 3 is used for conveying cleaning liquid or cleaning gas to clean the pH meter probe under the control of the PLC control system 4;
the pressurizing and heating device 5 is used for heating and pressurizing the cleaning liquid or the cleaning gas;
the pressure transmitter 6 is used for measuring the pressure in the cleaning device;
the inner nozzle 13 is used for cleaning the pH meter probe in the liquid pipeline to be measured;
the outer nozzle 14 is used for maintaining, cleaning and verifying the pH meter probe outside the liquid pipeline to be tested during maintenance and verification;
In this embodiment, when the pH meter 1 is used to measure the pH value of the liquid to be measured in the pipe of the liquid to be measured, the ball valve 12 is opened, the first manual valve 7, the electromagnetic valve 9, the second manual valve 10, and the third manual valve 11 are all in a closed state, the probe of the pH meter is axially inserted into the pipe of the liquid to be measured along the fixed protective sleeve 2 of the pH meter, and the pH meter 1 measures the pH value of the liquid to be measured flowing through the probe of the pH meter.
In this embodiment, when the pH meter probe is cleaned inside the liquid pipe to be measured, the first manual valve 7, the electromagnetic valve 9, and the second manual valve 10 are in the open state, the third manual valve 11 is in the closed state, the cleaning device conveys the cleaning liquid to the inner nozzle 13 by the action of the pressure-increasing heating device 5, and the inner nozzle 13 ejects the cleaning liquid to clean the pH meter probe from below the pH meter probe.
In this embodiment, when the pH meter probe is cleaned outside the liquid pipe to be measured, the pH meter probe is axially pulled out of the liquid pipe to be measured along the pH meter fixing protective sleeve 2, the pH meter probe is moved to the outer nozzle 14, the ball valve 12 is closed, the first manual valve 7, the electromagnetic valve 9, and the third manual valve 11 are in an open state, the second manual valve 10 is in a closed state, the cleaning device delivers the cleaning liquid or the cleaning gas to the outer nozzle 14 by the action of the pressurizing and heating device 5, and the outer nozzle 14 ejects the cleaning liquid or the cleaning gas to clean the pH meter probe.
The working modes of the pH meter 1 include on-line measurement, inner cleaning and outer cleaning.
The specific working principle is as follows: when the pH value of the liquid to be measured is measured on line, the first manual valve 7, the electromagnetic valve 9, the second manual valve 10 and the third manual valve 11 are all in a closed state, the probe of the pH meter 1 and the lower part of the pH meter fixing protective sleeve 2 are all located inside a liquid pipeline to be measured, the liquid to be measured in the liquid pipeline to be measured flows into the pH meter fixing protective sleeve 2 from the U-shaped liquid through hole notch of the pH meter fixing protective sleeve 2 to be contacted with the probe of the pH meter 1, the pH meter 1 measures the pH value of the liquid to be measured and transmits the pH value to the PLC control system 4, the PLC control system 4 analyzes the pH values of a plurality of groups of liquids to be measured, the pH value of the liquid to be measured is found to be abnormal, and the probe of the pH meter 1 needs to be cleaned at the moment. The cleaning is usually carried out in two ways, namely, internal cleaning and external cleaning, the first case adopts internal cleaning, the so-called internal cleaning is to clean the probe of the pH meter in the liquid pipeline to be measured, the probe of the pH meter 1 is still positioned in the liquid pipeline to be measured, the first manual valve 7 and the second manual valve 10 are manually controlled to be opened, the third manual valve 11 is kept in a closed state, the PLC control system 4 firstly controls the electromagnetic valve 9 to be opened, then controls the pressurizing and heating device 5 to pressurize (or heat as required) the cleaning liquid, the pressurized cleaning liquid flows through the pressure transmitter 6, the first manual valve 7, the check valve 8, the electromagnetic valve 9 and the second manual valve 10 along the cleaning device 3 in sequence and reaches the inner nozzle 13, finally the inner nozzle 13 sprays high-pressure cleaning liquid to the probe of the pH meter 1 positioned in the pH meter fixing protective sleeve 2 to flush mucus attached on the probe, after the flushing time reaches a set duration, the PLC control system 4 controls the pressurizing and heating device 5 to stop pressurizing, the check valve 8 blocks the counter flow of the liquid to be detected, the PLC control system 4 continues to control the electromagnetic valve 9 to be closed, and the first manual valve 7 and the second manual valve 10 are manually controlled to be closed, so that internal cleaning is completed; in the second case, external cleaning is adopted, because the viscosity of the liquid to be measured is high in some cases, the internal cleaning easily causes the internal narrowing of the liquid pipeline to be measured, and affects the flow of the liquid to be measured in the pipeline, so-called external cleaning is adopted, namely cleaning the probe of the pH meter outside the liquid pipeline to be measured, pulling the probe of the pH meter out of the liquid pipeline to be measured along the fixing protective sleeve 2 of the pH meter and moving the probe of the pH meter to the outer nozzle 14, manually controlling the first manual valve 7 and the third manual valve 11 to be opened, keeping the second manual valve 10 in a closed state, firstly controlling the electromagnetic valve 9 to be opened by the PLC control system 4, then controlling the pressurizing and heating device 5 to pressurize the cleaning liquid or cleaning gas (heating can be carried out when needed), and the pressurized cleaning liquid or cleaning gas flows through the pressure transmitter 6 and the first manual valve 7 along the cleaning device 3 in sequence, The one-way valve 8, the electromagnetic valve 9 and the third manual valve 11 reach the outer nozzle 14, finally the outer nozzle 14 sprays high-pressure cleaning liquid or cleaning gas to a probe of the pH meter to wash mucus attached to the probe, after the washing time reaches a set time, the PLC control system 4 controls the pressurizing and heating device 5 to stop pressurizing, the one-way valve 8 can block the backflow of the liquid to be detected, the PLC control system 4 continues to control the electromagnetic valve 9 to be closed, and the first manual valve 7 and the third manual valve 11 are manually controlled to be closed to finish external cleaning.
In the whole automatic cleaning process, the pressure transmitter 6 measures the pressure in the cleaning device 3 all the time, and transmits the pressure value to the PLC control system 4, when the PLC control system 4 determines that the pressure is abnormal, it is indicated that a risk exists, and the PLC control system 4 controls the pressurizing and heating device 5 to stop pressurizing.
In addition, when the pH value measured by the PLC control system 4 is abnormal or one or more of the pH meter 1, the pressure boost heating device 5, the pressure transmitter 6 and the electromagnetic valve 9 are failed or the water pressure is greater than a preset threshold value, the PLC control system 4 sends alarm information to the user.
In addition, a status indicator lamp is arranged on the PLC control system.
In this embodiment, because PLC control system can monitor the various states of device, the last status indicator lamp that is equipped with of PLC control system, when the device was in different states, the status indicator lamp shows different colours.
For example, when the device is operating normally, the status indicator light appears green; when any one or more of the pH meter 1, the pressurizing and heating device 5, the pressure transmitter 6 and the electromagnetic valve 9 has faults, the status indicator lamp is changed from green to red.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. A pH value on-line measuring device with an automatic cleaning function is characterized by comprising a pH meter, a pH meter fixing protective sleeve, a cleaning device and a PLC control system, wherein a pressurizing and heating device, a pressure transmitter, a first manual valve, a one-way valve and an electromagnetic valve are sequentially arranged on a main pipeline of the cleaning device along the flowing direction of a cleaning liquid, the tail end of the cleaning device comprises two branch pipes, one of the branch pipes is provided with a second manual valve and an inner nozzle, the inner nozzle is inserted into a liquid pipeline to be detected from the lower part of the liquid pipeline to be detected, the other branch pipe is provided with a third manual valve and an outer nozzle, and the branch pipe is arranged outside the liquid pipeline to be detected;
the pH meter is used for measuring the pH value of the liquid to be measured in the liquid pipeline to be measured;
the pH meter fixing protective sleeve is of a tubular structure, the inner diameter of the pH meter fixing protective sleeve is larger than the outer diameter of the pH meter, a ball valve is arranged at the upper part of the pH meter fixing protective sleeve, a plurality of U-shaped liquid through hole gaps are formed in the bottom of the pH meter fixing protective sleeve, the lower part of the pH meter fixing protective sleeve is inserted into the liquid pipeline to be measured from the upper part of the liquid pipeline to be measured, and the lower end of the pH meter fixing protective sleeve is positioned above the inner nozzle;
the cleaning device is used for conveying cleaning liquid or cleaning gas to clean the pH meter probe under the control of the PLC control system;
the pressurizing and heating device is used for heating and pressurizing the cleaning liquid or the cleaning gas;
the pressure transmitter is used for measuring the pressure in the cleaning device;
the inner nozzle is used for cleaning the pH meter probe in the liquid pipeline to be measured;
the outer nozzle is used for maintaining, cleaning and verifying the pH meter probe outside the liquid pipeline to be tested during maintenance and verification;
the PLC control system is connected with the pH meter, the pressurizing and heating device, the pressure transmitter and the electromagnetic valve and is used for controlling the working mode of the pH meter, controlling the pressurizing and heating device to heat and pressurize cleaning liquid or cleaning gas and controlling the pressure transmitter to measure the pressure in the cleaning device and control the opening and closing state of the electromagnetic valve and also used for processing the measurement data of the pH meter and the pressure transmitter.
2. The apparatus of claim 1, wherein the ball valve is opened when a pH meter is used to measure the pH of the liquid to be measured in the liquid pipe, the first manual valve, the electromagnetic valve, the second manual valve, and the third manual valve are all in a closed state, the pH meter probe is axially inserted into the liquid pipe along the pH meter fixing protective sleeve, and the pH meter measures the pH of the liquid to be measured flowing through the pH meter probe.
3. The apparatus of claim 2, wherein when the pH meter probe is cleaned inside the fluid conduit to be tested, the first manual valve, the solenoid valve, and the second manual valve are in an open state, and the third manual valve is in a closed state, and wherein the cleaning device delivers the cleaning fluid to the inner nozzle under the action of the boost heating device, and wherein the inner nozzle cleans the pH meter probe from below the pH meter probe.
4. The apparatus according to claim 2, wherein when the pH meter probe is cleaned outside the liquid pipe to be measured, the pH meter probe is axially pulled out of the liquid pipe to be measured along the pH meter fixing protective sleeve, the pH meter probe is moved to the outer nozzle, the ball valve is closed, the first manual valve, the electromagnetic valve, and the third manual valve are in an open state, the second manual valve is in a closed state, the cleaning device delivers the cleaning liquid or the cleaning gas to the outer nozzle under the action of the pressurizing and heating device, and the outer nozzle ejects the cleaning liquid or the cleaning gas to clean the pH meter probe.
5. The device according to any one of claims 1 to 4, wherein a status indicator light is provided on the PLC control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122010694.5U CN215985957U (en) | 2021-08-25 | 2021-08-25 | PH value on-line measuring device with self-cleaning function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122010694.5U CN215985957U (en) | 2021-08-25 | 2021-08-25 | PH value on-line measuring device with self-cleaning function |
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| Publication Number | Publication Date |
|---|---|
| CN215985957U true CN215985957U (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122010694.5U Active CN215985957U (en) | 2021-08-25 | 2021-08-25 | PH value on-line measuring device with self-cleaning function |
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| Country | Link |
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| CN (1) | CN215985957U (en) |
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2021
- 2021-08-25 CN CN202122010694.5U patent/CN215985957U/en active Active
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