CN213957210U - Online automatic calibration device of pH meter - Google Patents
Online automatic calibration device of pH meter Download PDFInfo
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- CN213957210U CN213957210U CN202022171789.0U CN202022171789U CN213957210U CN 213957210 U CN213957210 U CN 213957210U CN 202022171789 U CN202022171789 U CN 202022171789U CN 213957210 U CN213957210 U CN 213957210U
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Abstract
The utility model discloses an on-line automatic calibration device for a pH meter, which comprises a pH meter, a control unit and a cleaning calibration unit which are arranged on a pipeline of a liquid to be measured; the cleaning calibration unit comprises a first standard sample supply unit, a second standard sample supply unit, a cleaning liquid supply unit, a waste liquid recovery unit, a three-way electromagnetic valve, a first standard sample outlet electromagnetic valve, a second standard sample outlet electromagnetic valve, a cleaning liquid outlet electromagnetic valve, a waste liquid recovery electromagnetic valve and a detected liquid outlet electromagnetic valve, wherein the three-way electromagnetic valve and the detected liquid outlet electromagnetic valve are arranged at two ends of a detected liquid pipeline; the control unit is electrically connected with each electromagnetic valve and controls the on-off, and the control unit is in communication connection with the pH meter. The device improves the efficiency of the cleaning and calibration operation of the pH meter and avoids the potential safety hazard of the operation.
Description
Technical Field
The utility model relates to a detect technical field, especially relate to an online automatic calibration device of pH meter.
Background
After the pH meter for monitoring water quality is used for a period of time, due to various reasons such as environmental conditions and response attenuation of a detection instrument, a difference between a pH value detection result and an actual value is caused, so that the accuracy of measurement is seriously affected. In order to ensure the accuracy of the pH measurement, according to the corresponding on-line monitoring system operating specification, the pH meter needs to be periodically calibrated by cleaning the electrodes after being used for a period of time, so as to ensure the accuracy of the pH measurement.
At present, the electrode cleaning calibration of a pH meter is basically completed by manual operation, in the electrode cleaning process, the pH meter needs to be manually taken out of a measured liquid, then cleaning liquid is used for electrode cleaning, after the electrode cleaning is completed, standard samples with different pH values are used for detection, then the detected value is compared with the pH value of the standard sample, when the detected value has a larger deviation with the value of the standard sample, the manual adjustment calibration is performed through a pH meter controller, then the standard sample is repeatedly detected until the deviation of the detected value and the value of the standard sample meets the standard requirement, thereby the calibration of the pH meter is completed, and then the pH meter is manually installed in the measured liquid. Whole washing calibration process is not complicated, but relies on the manual work to wash the calibration, and when the more or unmanned remote area of quality of water monitoring point quantity, or some manual works are difficult to the special occasion that gets into again, the washing calibration of pH meter can consume a large amount of manual works and time, reduces the operating efficiency, and has certain potential safety hazard, also does not benefit to the automation and the standardization that equipment detected simultaneously.
Disclosure of Invention
The utility model aims to solve the technical problem that an online automatic calibration device of pH meter is provided, traditional pH meter washing calibration operation's defect is overcome to this device, its simple structure, and degree of automation is high, need not artificial intervention, satisfies the requirement of on-line monitoring system operation standard, improves the efficiency that pH meter washd calibration operation, avoids the potential safety hazard of operation.
In order to solve the technical problem, the on-line automatic calibration device for the pH meter comprises the pH meter, a control unit and a cleaning calibration unit, wherein the pH meter, the control unit and the cleaning calibration unit are arranged on a liquid pipeline to be measured;
the cleaning calibration unit comprises a first standard sample supply unit, a second standard sample supply unit, a cleaning liquid supply unit, a waste liquid recovery unit, a three-way electromagnetic valve, a first standard sample outlet electromagnetic valve, a second standard sample outlet electromagnetic valve, a cleaning liquid outlet electromagnetic valve, a waste liquid recovery electromagnetic valve and a detected liquid outlet electromagnetic valve, wherein the three-way electromagnetic valve and the detected liquid outlet electromagnetic valve are respectively arranged on the detected liquid pipeline and are positioned at the front end and the rear end of the pH meter;
the control unit is respectively electrically connected with the three-way electromagnetic valve, the first standard sample outlet electromagnetic valve, the second standard sample outlet electromagnetic valve, the cleaning liquid outlet electromagnetic valve, the waste liquid recovery electromagnetic valve and the detected liquid outlet electromagnetic valve and controls the on-off, and the control unit is in communication connection with the pH meter.
Further, the first standard sample supply unit and the second standard sample supply unit are respectively filled with standard samples with different pH values for calibrating the pH meter, the standard samples with different pH values are respectively transmitted to the vertical port of the three-way electromagnetic valve through the first standard sample outlet electromagnetic valve and the second standard sample outlet electromagnetic valve, the cleaning solution supply unit is filled with cleaning solution for cleaning the electrodes of the pH meter, and the cleaning solution is transmitted to the vertical port of the three-way electromagnetic valve through the cleaning solution outlet electromagnetic valve.
Further, the waste liquid recovery unit is a liquid storage tank, the pH meter is cleaned and calibrated through cleaning liquid and different pH value standard samples transmitted by the three-way electromagnetic valve, and waste liquid after cleaning and calibration is transmitted to the liquid storage tank through the waste liquid recovery electromagnetic valve.
Further, the control unit is a PLC controller.
Because the on-line automatic calibration device for the pH meter adopts the technical scheme, namely the device comprises the pH meter, the control unit and the cleaning calibration unit which are arranged on the pipeline of the liquid to be measured; the cleaning calibration unit comprises a first standard sample supply unit, a second standard sample supply unit, a cleaning liquid supply unit, a waste liquid recovery unit, a three-way electromagnetic valve, a first standard sample outlet electromagnetic valve, a second standard sample outlet electromagnetic valve, a cleaning liquid outlet electromagnetic valve, a waste liquid recovery electromagnetic valve and a detected liquid outlet electromagnetic valve, wherein the three-way electromagnetic valve and the detected liquid outlet electromagnetic valve are arranged at two ends of a detected liquid pipeline; the control unit is electrically connected with each electromagnetic valve and controls the on-off, and the control unit is in communication connection with the pH meter. The device overcomes the defects of the traditional pH meter cleaning and calibrating operation, has simple structure and high automation degree, does not need manual intervention, meets the requirement of the online monitoring system on the operation specification, improves the efficiency of the pH meter cleaning and calibrating operation, and avoids the potential safety hazard of the operation.
Drawings
The invention will be described in further detail with reference to the following drawings and embodiments:
fig. 1 is the structure schematic diagram of the on-line automatic calibration device of the pH meter of the present invention.
Detailed Description
The embodiment is shown in fig. 1, the on-line automatic calibration device for the pH meter of the present invention comprises a pH meter 2, a control unit 3 and a cleaning calibration unit 4, which are arranged in a measured liquid pipeline 1;
the cleaning calibration unit 4 comprises a first standard sample supply unit 41, a second standard sample supply unit 42, a cleaning solution supply unit 43, a waste liquid recovery unit 44, a three-way electromagnetic valve 45, a first standard sample outlet electromagnetic valve 46, a second standard sample outlet electromagnetic valve 47, a cleaning solution outlet electromagnetic valve 48, a waste liquid recovery electromagnetic valve 49 and a tested liquid outlet electromagnetic valve 50, the three-way electromagnetic valve 45 and the tested liquid outlet electromagnetic valve 50 are respectively arranged on the tested liquid pipeline 1 and are positioned at the front end and the rear end of the pH meter 2, the first standard sample supply unit 41, the second standard sample supply unit 42 and the cleaning solution supply unit 43 are connected to the vertical port of the three-way solenoid valve 45 through the first standard sample outlet solenoid valve 46, the second standard sample outlet solenoid valve 47 and the cleaning solution outlet solenoid valve 48 respectively, the two ends of the waste liquid recovery electromagnetic valve 49 are respectively connected with the inlet of the tested liquid outlet electromagnetic valve 50 and the waste liquid recovery unit 44;
the control unit 3 is respectively electrically connected with the three-way electromagnetic valve 45, the first standard sample outlet electromagnetic valve 46, the second standard sample outlet electromagnetic valve 47, the cleaning liquid outlet electromagnetic valve 48, the waste liquid recovery electromagnetic valve 49 and the measured liquid outlet electromagnetic valve 50 and controls the on-off, and the control unit 3 is in communication connection with the pH meter 2.
Preferably, the first standard sample supply unit 41 and the second standard sample supply unit 42 are respectively filled with standard samples with different pH values for calibrating the pH meter 2, the standard samples with different pH values are respectively transmitted to the vertical port of the three-way electromagnetic valve 45 through the first standard sample outlet electromagnetic valve 46 and the second standard sample outlet electromagnetic valve 47, the cleaning solution supply unit 43 is filled with cleaning solution for cleaning the electrode of the pH meter 2, and the cleaning solution is transmitted to the vertical port of the three-way electromagnetic valve 45 through the cleaning solution outlet electromagnetic valve 48.
Preferably, the waste liquid recovery unit 44 is a liquid storage tank, the pH meter 2 is cleaned and calibrated by the cleaning liquid and the standard samples with different pH values transmitted through the three-way electromagnetic valve 45, and the cleaned and calibrated waste liquid is transmitted to the liquid storage tank 44 through the waste liquid recovery electromagnetic valve 49.
Preferably, the control unit 3 is a PLC controller.
When the pH meter is in a normal detection mode, the control unit controls the on-off of each electromagnetic valve, at the moment, the three-way electromagnetic valve acts to enable the inlet end and the outlet end of the detected liquid pipeline to be communicated, the detected liquid pipeline and the vertical port of the three-way electromagnetic valve to be disconnected, the electromagnetic valves of the other pipelines are all in a closed state, the detected liquid flows in the pipelines, and the pH meter can detect the pH value of the detected liquid in real time.
When the cleaning calibration mode is used, according to the operation specification of a corresponding online monitoring system, after a pH meter detects that certain conditions are met, cleaning calibration operation is required, the control unit controls the three-way electromagnetic valve to act, the inlet end and the outlet end of the three-way electromagnetic valve are turned off, the vertical port and the outlet end are communicated, the cleaning liquid outlet electromagnetic valve and the waste liquid recovery electromagnetic valve are opened, the cleaning pipeline is communicated with the waste liquid recovery pipeline, and all the other pipeline electromagnetic valves are in a closed state. At the moment, the cleaning liquid supply unit works, the cleaning liquid is supplied into the pipeline and flows through the pH meter to clean the electrode tip of the pH meter, after a period of cleaning, the cleaning is stopped, the waste liquid is stored in the waste liquid recovery unit through the waste liquid recovery electromagnetic valve, and the cleaning liquid supply unit and the cleaning liquid outlet electromagnetic valve are closed. Subsequently, first standard sample outlet solenoid valve and second standard sample outlet solenoid valve open in proper order, first standard sample supply unit and second standard sample supply unit work in proper order, supply different pH value standard sample to the pipeline and flow through the pH meter, measure standard sample pH value and convey to the control unit by the pH meter, the control unit compares the pH value that will be surveyed with the standard sample and calibrates, repeat above-mentioned process, until detecting numerical value and standard sample numerical value deviation and satisfying technical specification requirement, accomplish the comparison calibration of pH meter, the standard sample during calibration is stored in waste liquid recovery unit through waste liquid recovery solenoid valve. And after the cleaning and calibration operation of the pH meter is finished, the initial normal detection mode is recovered, and the normal pH value detection of the liquid to be detected is carried out.
The device can realize the online automatic calibration operation of the pH meter respectively, avoids the defect of manual cleaning and calibration of the pH meter, can carry out online automatic cleaning and calibration on the pH meter arranged at a water quality monitoring point in the field or in a special occasion according to the thought of the device, stops potential safety hazards, and improves the cleaning and calibration operation efficiency.
Claims (4)
1. The utility model provides an online automatic calibration device of pH meter, is including locating the pH meter of being surveyed the liquid pipeline which characterized in that: the device also comprises a control unit and a cleaning calibration unit;
the cleaning calibration unit comprises a first standard sample supply unit, a second standard sample supply unit, a cleaning liquid supply unit, a waste liquid recovery unit, a three-way electromagnetic valve, a first standard sample outlet electromagnetic valve, a second standard sample outlet electromagnetic valve, a cleaning liquid outlet electromagnetic valve, a waste liquid recovery electromagnetic valve and a detected liquid outlet electromagnetic valve, wherein the three-way electromagnetic valve and the detected liquid outlet electromagnetic valve are respectively arranged on the detected liquid pipeline and are positioned at the front end and the rear end of the pH meter;
the control unit is respectively electrically connected with the three-way electromagnetic valve, the first standard sample outlet electromagnetic valve, the second standard sample outlet electromagnetic valve, the cleaning liquid outlet electromagnetic valve, the waste liquid recovery electromagnetic valve and the detected liquid outlet electromagnetic valve and controls the on-off, and the control unit is in communication connection with the pH meter.
2. The on-line automatic calibration device for the pH meter according to claim 1, characterized in that: the first standard sample supply unit and the second standard sample supply unit are respectively filled with standard samples with different pH values for calibrating the pH meter, the standard samples with different pH values are respectively transmitted to the vertical port of the three-way electromagnetic valve through the first standard sample outlet electromagnetic valve and the second standard sample outlet electromagnetic valve, the cleaning solution supply unit is filled with cleaning solution for cleaning the pH meter electrode, and the cleaning solution is transmitted to the vertical port of the three-way electromagnetic valve through the cleaning solution outlet electromagnetic valve.
3. The on-line automatic calibration device for the pH meter according to claim 1 or 2, characterized in that: the waste liquid recovery unit is a liquid storage tank, the pH meter is cleaned and calibrated through cleaning liquid and different pH value standard samples transmitted by the three-way electromagnetic valve, and the cleaned and calibrated waste liquid is transmitted to the liquid storage tank through the waste liquid recovery electromagnetic valve.
4. The on-line automatic calibration device for the pH meter according to claim 3, characterized in that: the control unit is a PLC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022171789.0U CN213957210U (en) | 2020-09-28 | 2020-09-28 | Online automatic calibration device of pH meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022171789.0U CN213957210U (en) | 2020-09-28 | 2020-09-28 | Online automatic calibration device of pH meter |
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| CN213957210U true CN213957210U (en) | 2021-08-13 |
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| CN202022171789.0U Active CN213957210U (en) | 2020-09-28 | 2020-09-28 | Online automatic calibration device of pH meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115825198A (en) * | 2023-02-14 | 2023-03-21 | 深圳天溯计量检测股份有限公司 | PH meter calibrating device based on multi-point calibration algorithm |
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2020
- 2020-09-28 CN CN202022171789.0U patent/CN213957210U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115825198A (en) * | 2023-02-14 | 2023-03-21 | 深圳天溯计量检测股份有限公司 | PH meter calibrating device based on multi-point calibration algorithm |
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