CN103308582A - Online automatic cleaning device of pH electrode and control method - Google Patents
Online automatic cleaning device of pH electrode and control method Download PDFInfo
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- CN103308582A CN103308582A CN2012100654853A CN201210065485A CN103308582A CN 103308582 A CN103308582 A CN 103308582A CN 2012100654853 A CN2012100654853 A CN 2012100654853A CN 201210065485 A CN201210065485 A CN 201210065485A CN 103308582 A CN103308582 A CN 103308582A
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Abstract
The invention relates to a method capable of controlling timing or separating a pH electrode from a measured medium in an online way under pressure without leakage at any time through a program and capable of automatically cleaning and maintaining. The pH electrode is enabled to be in contact with a measured medium only when the pH electrode needs to be measured, the pH electrode is automatically switched to a cleaning chamber for automatic cleaning and maintenance after the measurement is completed so as to shorten the contaminated time of the electrode, so that the electrode is in a maintenance state at most of the time, the service life of the pH electrode can be greatly prolonged, and meanwhile the labor maintenance amount is reduced. According to the method, on-site compressed air is adopted as an electrode expanding power source, a 36V direct current power supply is adopted as a control system power supply; a cleaning and control system is integrally mounted; control parameters can be remotely set; and the online automatic cleaning device is simple and practical, and is convenient for a user to use and maintain.
Description
Technical field
The present invention relates to the on-line auto-cleaning technology of pH electrode in the pH value of sewage water on-line monitoring technique of petroleum chemical industry corrosion and protection field; specifically during petrochemical industry pH value of sewage water on-line monitoring; the serviceable life of adopting a kind of automatic cleaning and withdrawing from the method prolongation electrode of protection; and need not remove electrode and carry out manual maintenance, but a kind of electrodes maintenance method of on-line auto-cleaning electrode.
Background technology
The stable of control medium pH value is a particularly major measure of Petrochemical Enterprises equipment anticorrosion of petrochemical industry.By the variation of monitoring PH values, come acid in the neutralization medium by annotating the process meanses such as ammonia (or amine), thereby reach the up to standard and stable of PH values.The pH value of monitoring medium in one's early years is by regular hand sampling metering system, this mode have measure and feedback time long, low-response, and stride multidisciplinary management, the drawbacks such as waste resource, in the situation that refining peracid sour crude, because response lag, cause the corrosion of equipment to increase, the hand sampling metering system has been not suitable for the modern management of Petrochemical Enterprises, the substitute is now the on-line monitoring technique of pH value, the pH electrode is directly acted on measured medium, by on-line measurement, data become send the pH that directly obtains medium value, even the pH value with annotate ammonia (amine) amount and combine, form the closed-loop control of PH values, effectively avoided the drawback of hand sampling monitoring, the corrosion that has slowed down equipment.But, because the Main Bottleneck that the pollution of pH electrode has become pH value on-line monitoring technique and Closed loop Control effectively to promote, the multiple composition that can contaminated electrode such as the sewage sulfur compound of Refining Chemical Industry, salt, greasy dirt, electrode contacts with the uninterrupted of medium in addition, cause the useful life of electrode short, maintenance is large, has had a strong impact on the popularization of pH value on-line monitoring technique and Closed loop Control.The technology is invented for the pollution problem that solves the pH electrode.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of manually on-the-spot intervention, can regularly or at any time pH electrode and the online nothing with pressure of measured medium be leaked pH electrode on-line auto-cleaning device and the control method that breaks away from and clean and maintain by programmed control.
The technical scheme that adopts is:
PH electrode on-line auto-cleaning device, comprise the pH electrode, the electrode carrier that stretches, cleaning chambers, interface, measured medium pipe and cylinder, described pH electrode stretches with electrode and is fixedly connected with for the NPT pipe thread between the carrier, at least be provided with a piston rod packing circle in the flexible carrier of electrode, the rear portion of interface is fixedly connected with the measured medium pipeline, the front portion of interface is fixedly connected with the rear portion of cleaning chambers, the flexible carrier of the front portion of cleaning chambers and electrode is pegged graft, cleaning chambers radially vertically has two rinse mouths, two rinse mouths face the radial aperture place of carrier when maintenance state, the cleaning chambers outside is equiped with piston packing, at least be provided with a piston rod packing circle in the cleaning chambers, described cylinder is connected on the cleaning chambers by fixed mount, and cylinder push-rod is connected by the flexible carrier of carrier pushing-pulling-rack and electrode.
Preferably be provided with 3 piston rod packing circles in the above-mentioned cleaning chambers, 3 O-ring seal spacings are greater than the width of the flexible carrier middle opening of electrode.
Preferably be provided with 3 piston rod packing circles in the flexible carrier of above-mentioned electrode.
PH electrode on-line auto-cleaning device and control method comprise following technological process:
System's plugged also carries out initialization operation: guarantee that Clean water valve is in cut-off state, the pH electrode is in cleaning chambers, and the pH data acquisition unit is in non-reading state.
Terminal starts pH electrode on-line auto-cleaning control program, is set as follows parameter by man-machine interface: the time that each time circulation is measured, flushing electrode time, Measurement sensibility time, reading duration, the pH value of flush time, scouring media again.Be written to controller and curing by the RS485 communication bus behind the setup parameter.During next time operation control program, and if parameter change were arranged after the change of terminal man-machine interface writing controller again, otherwise the setting of controller acquiescence last time.
Starting is measured rear one and is measured the circulation beginning, and controller control cylinder solenoid valve is done the transposition action, and cylinder promotes carrier movement, makes electrode stretch into the measured medium pipeline and contacts with measured medium, enters the reading standby condition, and setup time is by the control setting parameter.Afterwards, the pH data acquisition unit begins with certain density readings, simultaneously data communication device is crossed the change of RS485 bus and is delivered to storage and processing in the monitoring equipment, and show at monitoring interface.Reading duration is by the control setting parameter.
Behind the reading, the action of controller control cylinder solenoid valve, electrode is retracted in the cleaning chambers.
The action of controller control clear water stop valve, the clear water pipeline conducting, clear water begins to wash electrode by self-pressure, and the sewage transport after the flushing is to device for recycling sewage.Flush time is by the control setting parameter.
Close the clear water stop valve and stop to wash electrode, electrode is immersed in the clear water, breaks away from measured medium and is in the maintenance state.
System reads the pH value of clear water, as the rough judgement of electrode state, because the pH value of clear water is basicly stable, and if deviation of reading is larger, then again flushing, reading is still overproof after the flushing again, then system alarm request manual intervention.Flush time is by the control setting parameter again.
Electrode is in the clear water until starting is measured next time, and each measures cycling time by the control setting parameter.
The present invention has following beneficial effect:
1. electrode switching with pressure between cleaning chambers and measurement chamber.For the pH electrode provides a cavity with measured medium isolation, make the pH electrode in the situation that non-shut-down is switched measuring between chamber and the cleaning chambers, for online maintenance and the maintenance of pH electrode provides means.
Electrode in cleaning chambers, clean, measuring media pH value in measuring the chamber.The work of electrode be maintained in different environment under carry out, in measuring the chamber, finish the measurement of PH values, in cleaning chambers, finish the cleaning of pH electrode, under off position, electrode is retained in and is in the maintenance state in the cleaning liquid.
3. by programmed control the electrode respectively residence time in measuring chamber and cleaning chambers and the time of electrode washing, flexible, reduce to greatest extent contaminated time of electrode.
4. can man-machine interface operate pH electrode isolation and cleaning action in the time in office.
5. raising electrode life, and reduce electrodes maintenance workload and maintenance cost.
Description of drawings
Fig. 1 is pH electrode band pressure stretch compression apparatus exploded view of the present invention.
Fig. 2 is the schematic diagram of pH electrode maintenance state of living among the present invention.
Fig. 3 is the schematic diagram of middle PH electrode of the present invention measuring state of living in.
Fig. 4 is that the pH electrode telescopic device adds and joins power system figure among the present invention.
Fig. 5 is the structural representation of pH electrode on-line auto-cleaning device.
Embodiment
PH electrode on-line auto-cleaning device, comprise pH electrode 1, the electrode carrier 2 that stretches, cleaning chambers 3, interface 4, measured medium pipeline 5 and cylinder 6, pH electrode 1 stretches with electrode and is fixedly connected with for the NPT pipe thread between the carrier 2, be provided with 3 piston rod packing circles 7 in the flexible carrier 2 of electrode, the rear portion of interface 4 is fixedly connected with measured medium pipeline 5, the front portion of interface 4 is fixedly connected with the rear portion of cleaning chambers 3, the flexible carrier 2 of the front portion of cleaning chambers 3 and electrode is pegged graft, the flexible carrier 2 of electrode can be in cleaning chambers 3 interior slips, cleaning chambers 3 radially vertically has two rinse mouths 8, two rinse mouths 8 face the radial aperture place of carrier when maintenance state, cleaning chambers 3 outsides are equiped with piston packing 9, be provided with 3 equidistant piston rod packing circles 10 in the cleaning chambers 3,3 O-ring seal spacings are greater than the width of flexible carrier 2 middle openings of electrode, and the left side O-ring seal guarantees cleaning chambers and extraneous isolation.The isolation that the O-ring seal assurance cleaning chambers on centre and right side and measured medium pipeline are 5, the double sealing coil structures guarantees to have all the time when Switch of working position at least one O-ring seal to play a role, and eliminates the connection between two cavitys that cause when O-ring seal is in the carrier aperture position.So just reach and make pH electrode 1 and measured medium without leaking the purpose that breaks away from the online situation with pressure, pH electrode 1 is cleaned and maintenance in cleaning chambers 3.Cylinder 6 is connected on the cleaning chambers 3 by fixed mount 11, and cylinder push-rod 12 is connected by the flexible carrier 2 of carrier pushing-pulling-rack 13 and electrode, and the flexible carrier 2 of band moving electrode is in cleaning chambers 3 interior slips.
PH electrode on-line auto-cleaning device and control method comprise following concrete operation step:
System's plugged also carries out initialization operation: guarantee that Clean water valve is in cut-off state, the pH electrode is in cleaning chambers, and the pH data acquisition unit is in non-reading state.Be in the system default state about control parameters such as each circulation Measuring Time, flushing electrode time, Measurement sensibility time, reading durations, and if parameter change were arranged after the setting of terminal man-machine interface writing controller again.Controller and pH data acquisition unit are accepted the instruction of terminal simultaneously as two RS485 addresses arranged side by side, and coordination.
Measure the circulation beginning for one, controller control cylinder solenoid valve transposition action, cylinder promotes carrier movement, makes electrode stretch into the measured medium pipeline and contacts with measured medium, enters the reading standby condition, and setup time is by the control setting parameter.Afterwards, the pH data acquisition unit begins with certain interval reading, simultaneously data is delivered to and is stored in the terminal and process, and show at monitoring interface.Reading duration is by the control setting parameter.
Behind the reading, the action of controller control cylinder solenoid valve, electrode is retracted in the cleaning chambers.
The action of controller control clear water stop valve, the clear water pipeline conducting, clear water begins to wash electrode by self-pressure, and the sewage transport after the flushing is to device for recycling sewage.Flush time is by the control setting parameter.
Close the clear water stop valve and stop to wash electrode, electrode is immersed in the clear water, break away from measured medium and be in the maintenance state, system reads the pH value of clear water therebetween, as the rough judgement of electrode state, because the pH value of clear water is basicly stable, if deviation of reading is larger, then again flushing, reading is still overproof after the flushing again, then system alarm request manual intervention.Flush time is by the control setting parameter again.
Electrode is in the clear water until starting is measured next time, and each measures cycling time by the control setting parameter.
Claims (4)
1.pH electrode on-line auto-cleaning device, comprise the pH electrode, the electrode carrier that stretches, cleaning chambers, interface, measured medium pipe and cylinder, it is characterized in that being fixedly connected with for the NPT pipe thread between the flexible carrier of described pH electrode and electrode, at least be provided with a piston rod packing circle in the flexible carrier of electrode, the rear portion of interface is fixedly connected with the measured medium pipeline, the front portion of interface is fixedly connected with the rear portion of cleaning chambers, the flexible carrier of the front portion of cleaning chambers and electrode is pegged graft, cleaning chambers radially vertically has two rinse mouths, two rinse mouths face the radial aperture place of carrier when maintenance state, the cleaning chambers outside is equiped with piston packing, at least be provided with a piston rod packing circle in the cleaning chambers, described cylinder is connected on the cleaning chambers by fixed mount, and cylinder push-rod is connected by the flexible carrier of carrier pushing-pulling-rack and electrode.
2. pH electrode on-line auto-cleaning device according to claim 1 is characterized in that being provided with in the described cleaning chambers 3 piston rod packing circles, and 3 O-ring seal spacings are greater than the width of the flexible carrier middle opening of electrode.
3. pH electrode on-line auto-cleaning device according to claim 1 is characterized in that being provided with 3 piston rod packing circles in the flexible carrier of described electrode.
4.pH electrode on-line auto-cleaning device and control method is characterized in that comprising following technological process:
System's plugged also carries out initialization operation: guarantee that Clean water valve is in cut-off state, the pH electrode is in cleaning chambers, and the pH data acquisition unit is in non-reading state;
Terminal starts pH electrode on-line auto-cleaning control program, be set as follows parameter by man-machine interface: the time that each time circulation is measured, the flushing electrode time, the Measurement sensibility time, reading duration, flush time again, the pH value of scouring media, be written to controller and curing by the RS485 communication bus behind the setup parameter, during operation next time control program, if parameter change were arranged after terminal man-machine interface change writing controller again, otherwise controller is given tacit consent to the setting of last time, starting is measured rear one and is measured the circulation beginning, controller control cylinder solenoid valve is done the transposition action, cylinder promotes carrier movement, making electrode stretch into the measured medium pipeline contacts with measured medium, enter the reading standby condition, setup time is by the control setting parameter, afterwards, the pH data acquisition unit begins with certain density readings, simultaneously data communication device is crossed the change of RS485 bus and is delivered to storage and processing in the monitoring equipment, and in the monitoring interface demonstration, the reading duration is by the control setting parameter;
Behind the reading, the action of controller control cylinder solenoid valve, electrode is retracted in the cleaning chambers, the action of controller control clear water stop valve, the clear water pipeline conducting, clear water begins to wash electrode by self-pressure, sewage transport after the flushing is to device for recycling sewage, and flush time is by the control setting parameter;
Close the clear water stop valve and stop to wash electrode, electrode is immersed in the clear water, breaks away from measured medium and is in the maintenance state;
System reads the pH value of clear water, as the rough judgement of electrode state, because the pH value of clear water is basicly stable, if deviation of reading is larger, then again flushing, reading is still overproof after the flushing again, then system alarm request manual intervention, flush time is by the control setting parameter again;
Electrode is in the clear water until starting is measured next time, and each measures cycling time by the control setting parameter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100654853A CN103308582A (en) | 2012-03-14 | 2012-03-14 | Online automatic cleaning device of pH electrode and control method |
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| CN2012100654853A CN103308582A (en) | 2012-03-14 | 2012-03-14 | Online automatic cleaning device of pH electrode and control method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852507A (en) * | 2012-11-30 | 2014-06-11 | 汪林林 | Measuring device suitable for plugging and unplugging under pressure |
| CN104460414A (en) * | 2014-10-28 | 2015-03-25 | 南京中电自动化有限公司 | Input type automatic PH glass electrode adjusting device and method |
| CN105523623A (en) * | 2015-12-30 | 2016-04-27 | 华润电力（贺州）有限公司 | A buffer pool for measuring a pH value of industrial wastewater |
| CN106841356A (en) * | 2017-01-12 | 2017-06-13 | 杭州原创软件有限公司 | A kind of self-cleaning pH on-line monitoring systems |
| CN108840381A (en) * | 2018-07-18 | 2018-11-20 | 温州大学 | High-precision sewage automatic monitoring device |
| CN109443483A (en) * | 2018-11-19 | 2019-03-08 | 珠海格力电器股份有限公司 | Electrode protection device, liquid level detection device and household appliance |
| CN113045052A (en) * | 2021-04-23 | 2021-06-29 | 玉环嘉言机械有限公司 | Sewage purification bucket |
| CN113607889A (en) * | 2021-08-04 | 2021-11-05 | 杭州新标能源环境科技有限公司 | Fluid measuring device capable of being overhauled on line |
| CN115672219A (en) * | 2022-11-07 | 2023-02-03 | 中建三局第三建设工程有限责任公司 | Method and system for automatically controlling pH value of reaction kettle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05296969A (en) * | 1992-04-17 | 1993-11-12 | Sumitomo Metal Mining Co Ltd | Electrode cleaning device |
| US20040069619A1 (en) * | 2001-04-03 | 2004-04-15 | Ralf Koenemann | Automatable measuring, cleaning and calibration device for pH-electrodes or electrodes for measuring redox potentials |
| CN101813661A (en) * | 2010-02-26 | 2010-08-25 | 北京矿冶研究总院 | Automatic cleaning mechanism of pH meter |
-
2012
- 2012-03-14 CN CN2012100654853A patent/CN103308582A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05296969A (en) * | 1992-04-17 | 1993-11-12 | Sumitomo Metal Mining Co Ltd | Electrode cleaning device |
| US20040069619A1 (en) * | 2001-04-03 | 2004-04-15 | Ralf Koenemann | Automatable measuring, cleaning and calibration device for pH-electrodes or electrodes for measuring redox potentials |
| CN101813661A (en) * | 2010-02-26 | 2010-08-25 | 北京矿冶研究总院 | Automatic cleaning mechanism of pH meter |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103852507A (en) * | 2012-11-30 | 2014-06-11 | 汪林林 | Measuring device suitable for plugging and unplugging under pressure |
| CN104460414A (en) * | 2014-10-28 | 2015-03-25 | 南京中电自动化有限公司 | Input type automatic PH glass electrode adjusting device and method |
| CN105523623A (en) * | 2015-12-30 | 2016-04-27 | 华润电力（贺州）有限公司 | A buffer pool for measuring a pH value of industrial wastewater |
| CN106841356A (en) * | 2017-01-12 | 2017-06-13 | 杭州原创软件有限公司 | A kind of self-cleaning pH on-line monitoring systems |
| CN108840381A (en) * | 2018-07-18 | 2018-11-20 | 温州大学 | High-precision sewage automatic monitoring device |
| CN108840381B (en) * | 2018-07-18 | 2021-03-23 | 温州大学 | High-precision sewage automatic monitoring device |
| CN109443483A (en) * | 2018-11-19 | 2019-03-08 | 珠海格力电器股份有限公司 | Electrode protection device, liquid level detection device and household appliance |
| CN113045052A (en) * | 2021-04-23 | 2021-06-29 | 玉环嘉言机械有限公司 | Sewage purification bucket |
| CN113607889A (en) * | 2021-08-04 | 2021-11-05 | 杭州新标能源环境科技有限公司 | Fluid measuring device capable of being overhauled on line |
| CN115672219A (en) * | 2022-11-07 | 2023-02-03 | 中建三局第三建设工程有限责任公司 | Method and system for automatically controlling pH value of reaction kettle |
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Application publication date: 20130918 |