CN203772794U - Portable PH meter calibration device - Google Patents
Portable PH meter calibration device Download PDFInfo
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- CN203772794U CN203772794U CN201420086989.8U CN201420086989U CN203772794U CN 203772794 U CN203772794 U CN 203772794U CN 201420086989 U CN201420086989 U CN 201420086989U CN 203772794 U CN203772794 U CN 203772794U
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Abstract
The utility model relates to a portable PH meter calibration device which comprises a No. 1 liquid bath, a No. 2 liquid bath, a No. 3 liquid bath, a PH meter measuring flow cell, a first valve, a second valve, a measuring medium outlet valve and a measuring medium inlet valve, wherein a PH meter electrode is arranged in the PH meter measuring flow cell; the No. 1 liquid bath, the No. 2 liquid bath and the No. 3 liquid bath are communicated with the PH meter measuring flow cell respectively through pipelines; an electromagnetic valve is arranged on each pipeline; the inlet of the first valve is communicated with each electromagnetic valve, and the outlet of the first valve is communicated with the PH meter measuring flow cell; a first liquid outlet pipe is arranged on an outlet pipeline of the first valve; the measuring medium outlet valve is arranged on the first liquid outlet pipe; the PH meter measuring flow cell is further connected with a second liquid outlet pipe; the second valve is arranged on the second liquid outlet pipe; a sampling pipe is arranged on a pipeline by which the PH meter measuring flow cell is communicated with the second valve; and the measuring medium inlet valve is arranged on the sampling pipe. By adopting the portable PH meter calibration device, the problems of complicated process, low working efficiency and inconvenient operation in the conventional PH meter calibration are solved.
Description
Technical field
The utility model relates to PH meter technical field, particularly measurement and the demarcation field of the online PH meter of water technology, water quality detection equipment generally all needs regularly to safeguard demarcation, to guarantee that water quality analyzing instrument detects the reliable and stable of data, the utility model is specifically related to a kind of portable PH meter caliberating device.
Background technology
PH counts (acidometer), is a kind of conventional instrument and equipment, is mainly used to the pH value of precision measurement liquid medium, mixes corresponding ion-selective electrode and can measure ion electrode current potential mV value, is widely used in the fields such as industry, agricultural, scientific research, environmental protection.PH is the abbreviation (Pondus=pressure, pressure hydrogenium=hydrogen) of Latin " Pondus hydrogenii " word, is used for measuring hydrionic activity in material, and this activity is directly connected to acidity, the neutrality and alkaline of aqueous solution.
Industrial circle and laboratory are all being used the PH meter of various models and specification widely at present, PH meter is generally made up of potential electrode and electricity meter two parts, potential electrode comprises indicator electrode and contrast electrode, the function of indicator electrode is to the hydrogen ion sensitivity in solution, reflect potential difference (PD) with hydrionic variation, conventional indicator electrode is glass electrode.Contrast electrode mainly refers to outer contrast electrode, and the effect of contrast electrode is to provide constant current potential, as the reference that departs from current potential.Electrode is to be measurable value of electrical signals by PH sensing glass film by chemical quantity H+ ion conversion in detected solution, so PH electrode is defined as again the electrochemical sensor of H+ ion-sensitive.Electricity meter is for measuring overall current potential, and it can capture small potential change in the circuit of Resistance Maximum, and this variation is showed by instrument.
While utilizing the pH value of PH instrumentation amount solution, the general electrode method that adopts, first with indicator electrode, contrast electrode and PH standard buffer solution composition battery, its electromotive force input electricity meter, instrument is carried out to " calibration ", then change with detected solution with pair of electrodes composition battery, cell emf is also input in electricity meter, through comparing, electricity meter displayed value is the pH value of detected solution.
Adopting electrode method to carry out pH and measure and must demarcate, is exactly that the standard solution of unknown solution and known pH value is acted on to comparative measurements in measurement battery because electrode method pH measures.Although pH meter kind is a lot, its calibration steps all adopts 2 calibration methods, selects two kinds of standard buffer solutions: one is pH7 standard buffer solution, and the second is pH9 standard buffer solution or pH4 standard buffer solution.First with pH7 standard buffer solution, electricity meter is positioned, then select the second standard buffer solution according to the Acidity of Aikalinity of solution to be measured.If it is acid that solution to be measured is, select pH4 standard buffer solution; If solution to be measured is alkalescence, select pH9 standard buffer solution.After calibration, the electrode water that immerses standard buffer solution should be rinsed especially, because the buffer action of buffer solution, if brought into after detected solution, can cause measuring error.
Water quality detection equipment generally all needs regularly to safeguard demarcation, to guarantee that water quality analyzing instrument detects the reliable and stable of data, as Fig. 1, the scaling method of existing PH meter normally, under normal measuring state, is shut down, close the sample cock of import and export, the electrode of dismounting PH meter, uses distilled water cleaning electrode, then electrode is put into the standard solution survey record of PH=6.86; Clean again the standard solution kind survey record that is reentered into PH=4.00 or PH=9.18; The flow cell that after qualified, electrode is reloaded to PH meter is normally measured, and changes the electrode of PH meter as defective.This calibration process repeatable operation, the connection sealing that easily causes PH meter flow cell can decline and cause leakage, and electrode Special-purpose connecting line and potassium chloride damping fluid pipeline damage leakage, affect usability and serviceable life that PH counts.In prior art, the scaling method step of PH meter is as follows:
1) shut down the import and export sample cock of closing analysis meter, the sensor in dismounting PH meter flow cell;
2) sensor is put into the container cleaning electrode that distilled water is housed;
3) sensor cleaning is put into the container that PH=6.86 standard solution is housed, detect and analyze;
4) sensor is put into the container cleaning electrode that distilled water is housed;
5) sensor cleaning is put into PH=4.00(or PH=9.18 is housed) container of standard solution, detects and analyzes;
6) sensor is ressembled to PH instrumentation amount flow cell, opened measuring media sample cock, pass into measured medium and measure.
The patent No. is in one section of patent documentation of CN201220093450.6, " PH electrode on-line auto-cleaning device " disclosed, this device is mainly to pack PH electrode into electrode flexible carrier, be connected with cleaning chambers and cylinder, be connected with the flexible carrier of carrier pushing-pulling-rack and electrode by cylinder push-rod, play the function that PH electrode on-line cleaning is safeguarded.But this device only has the function of cleaning electrode, cannot automatically complete whole calibration process.
Application number is, in one section of Patent Application Publication of 201110459046.6, to disclose " a kind of PH takes into account its scaling method ".This PH meter comprises housing, control circuit, calibration switch, indicating device, glass electrode, contrast electrode and reference solution, is provided with at least two liquid pools in housing, at least two liquid pools, damping fluid is housed; The bottom of liquid pool offers liquid outlet, and the top of liquid pool offers air intake opening; Liquid outlet is communicated with glass electrode by a catheter, in liquid outlet place or catheter, liquid valve is installed; Air intake opening place is provided with gas admittance valve; Liquid valve, gas admittance valve are all electrically connected with control circuit.This PH meter complex structure, calibration process is comparatively loaded down with trivial details, and efficiency is low.And because liquid pool is arranged in PH meter housing, when needs supplement, when exchange buffering liquid, also need to shut down dismounting, PH meter is installed, operate extremely inconvenient.
Utility model content
The purpose of this utility model is to provide a kind of portable PH meter caliberating device; this device can automatic replacing cleaning solution and standard solution; clean PH flowmeter sensor and demarcate; remove the loaded down with trivial details step of shutting down dismounting PH meter, cleaning demarcation, Installation and Debugging from; can greatly improve demarcation efficiency, in order to solve calibration process complexity, inefficiency, the unhandy problem of existing PH meter.
For achieving the above object, scheme of the present utility model is: a kind of portable PH meter caliberating device, comprise a liquid pool for packing a standard solution into, for packing No. two liquid pools of No. two standard solution into, for packing No. three liquid pools of cleaning solution and the PH instrumentation amount flow cell of measuring for PH into, described PH meter electrode is positioned in PH instrumentation amount flow cell, this device also comprises the first valve, the second valve, measuring media outlet valve and measuring media inlet valve, a described liquid pool, No. two liquid pools and No. three liquid pools are provided with liquid outlet, each described liquid outlet is communicated with described PH instrumentation amount flow cell by corresponding pipeline respectively, on each described pipeline, be provided with solenoid valve, the entrance of described the first valve is communicated with each described solenoid valve, the outlet of described the first valve is communicated with PH instrumentation amount flow cell,
On the pipeline that described PH instrumentation amount flow cell is connected with the first valve, be also connected with the first discharging tube, described measuring media outlet valve is arranged on the first described discharging tube; Described PH instrumentation amount flow cell is also connected with the second discharging tube, and the second described valve is arranged on the second described discharging tube; On the pipeline that described PH instrumentation amount flow cell is connected with the second valve, be also connected with measuring media stopple coupon, described measuring media inlet valve is arranged on described measuring media stopple coupon.
Further, the entrance of described measuring media inlet valve is communicated with measuring media sample cock, and the outlet of measuring media inlet valve is communicated with described PH instrumentation amount flow cell.
Further, the entrance of described measuring media outlet valve is communicated with described PH instrumentation amount flow cell, and the outlet of described measuring media outlet valve is communicated with the leakage fluid dram of the first discharging tube.
Further, the entrance of the second described valve is communicated with described PH instrumentation amount flow cell, and the outlet of the second described valve is communicated with the leakage fluid dram of the second discharging tube.
Further, described PH meter electrode is communicated with No. four liquid pools that damping fluid is housed by buffer pipe, and PH meter electrode is connected with display by electrode connecting line.
Further, described cleaning solution is distilled water.
The beneficial effect that the utility model reaches: the utility model uses easy to operate simple; shut down without measuring equipment; also count any equipment without dismounting PH; avoided frequent shutdown disassembling section, the parts such as circuit to PH meter, pipeline, encapsulant, fastening interface cause measurement aging, that damage causes abnormal.Meanwhile, also avoid measurement environment severe, joint connection in site circuit, length of pipe restriction, the PH meter electrode forming can not be stablized the situation that standard solution is demarcated that is placed in, the efficiency of demarcating is high, completes online PH meter daily servicing, cleaning, demarcation, is conducive to extend the serviceable life of measuring equipment.In addition, this device is owing to having adopted the design of integrated type, and volume is little to be easy to carry, and uses and can supplement easily and change cleaning solution and standard solution for scene, therefore can use in batches at the scene.
Brief description of the drawings
Fig. 1 is the implementation process schematic diagram that existing PH meter is demarcated;
Fig. 2 is that the utility model standard solution and cleaning solution are at ducted flow direction schematic diagram;
Fig. 3 is that the utility model measured medium is at ducted flow direction schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
In Fig. 1～3,1 is a liquid pool, and 2 is No. two liquid pools, and 3 is No. three liquid pools, and 4 is the first valve, and 5 is the second valve, and 6 is measuring media inlet valve, and 7 is measuring media outlet valve, and 8 is measuring media sample cock, and 9 is PH instrumentation amount flow cell, and 10 is solenoid valve.
Portable PH meter caliberating device of the present utility model, comprise a liquid pool for packing a standard solution into, for packing No. two liquid pools of No. two standard solution into, for packing No. three liquid pools of cleaning solution and the PH instrumentation amount flow cell of measuring for PH into, described PH meter electrode is positioned in PH instrumentation amount flow cell, this device also comprises the first valve, the second valve, measuring media outlet valve and measuring media inlet valve, a described liquid pool, No. two liquid pools and No. three liquid pools are provided with liquid outlet, each described liquid outlet is communicated with described PH instrumentation amount flow cell by corresponding pipeline respectively, on each described pipeline, be provided with solenoid valve, the entrance of described the first valve is communicated with each described solenoid valve, the outlet of described the first valve is communicated with PH instrumentation amount flow cell, on the pipeline that described PH instrumentation amount flow cell is connected with the first valve, be also connected with the first discharging tube, described measuring media outlet valve is arranged on the first described discharging tube, described PH instrumentation amount flow cell is also connected with the second discharging tube, and the second described valve is arranged on the second described discharging tube, on the pipeline that described PH instrumentation amount flow cell is connected with the second valve, be also connected with measuring media stopple coupon, described measuring media inlet valve is arranged on described measuring media stopple coupon.
The utility model device is PH to be counted to a needed standard solution in calibration process, No. two standard solution and cleaning solution be respectively charged into corresponding liquid pool, liquid outlet at each liquid pool is connected with solenoid valve by corresponding pipeline, each solenoid valve is communicated with PH instrumentation amount flow cell by corresponding pipeline respectively, utilize this device to carry out timing signal to PH meter, according to the precedence of calibration process, control various solution by the keying of control solenoid valve and replace to PH instrumentation amount flow cell, reach PH sensor electrode is implemented to the object of cleaning, demarcating.
This device is also furnished with intelligent instrument demonstration simultaneously, can be according to the PH meter electrode of different model, arrange and adjust required displacement, the capacity of cleaning solution and the required nominal time of calibration process, all solenoid valves, also can external power supply on-line operation charging by device internal battery group powered operation.Device is furnished with the quick connecting parts and the special hose that are connected with site analysis device sampling import and export pipeline, is convenient to quick connection.
The utility model is carrying out timing signal, first will open measuring media outlet valve, measuring media in PH instrumentation amount flow cell is emptying by the first discharging tube, then close the second valve, measuring media inlet valve, measuring media outlet valve and sample cock, the solenoid valve of opening the first valve and being connected with No. three liquid pool liquid outlets, thereby No. three liquid pools are connected with PH instrumentation amount flow cell, distilled water in No. three liquid pools flows in PH instrumentation amount flow cell by pipeline, PH meter electrode is cleaned, after cleaning completes, close the solenoid valve being connected with No. three liquid pool liquid outlets, open the second valve, cleaning solution is discharged by the second discharging tube, and close the second valve.
After PH meter electrode clean is completed, open the solenoid valve being connected with liquid pool liquid outlet, a liquid pool is connected with PH instrumentation amount flow cell, a standard buffer solution in a liquid pool flows in PH instrumentation amount flow cell by pipeline, PH meter electrode is detected to analysis, after detection has been analyzed, then open the second valve, a standard buffer solution is discharged by the second discharging tube, and close the second valve; And then repeat the above-mentioned step that PH meter electrode is cleaned; Last open again the solenoid valve that No. two liquid pool liquid outlets are connected, in PH instrumentation amount flow cell, pass into standard solution No. two, PH meter electrode is detected to analysiss, after detection has been analyzed, discharge No. two standard solution, complete the demarcation that PH is counted.After demarcation, open sample cock, in PH instrumentation amount flow cell, pass into measuring media, directly enter measuring state.
Portable PH meter automatic calibration device of the present utility model, is on original PH counter device, has increased the valve for controlling, cut off measured medium.Under measuring state, measured medium can normally circulate; Under demarcation state, can cut off measured medium, and emptying PH meter detects the measured medium in flow cell; By in the operation pipeline of portable PH meter automatic calibration device access PH meter, pass into cleaning solution PH meter electrode is cleaned on request, after emptying cleaning solution, pass into standard solution PH meter electrode is implemented to on-line proving; Above two steps can be implemented repeatedly, PH meter electrode are implemented to the demarcation of multiple spot.After demarcation, switchover operation valve, directly enters measuring state.
The utility model uses easy to operate simple; shut down without measuring equipment; also count any equipment without dismounting PH, avoided frequent shutdown disassembling section, the parts such as circuit to PH meter, pipeline, encapsulant, fastening interface cause measurement aging, that damage causes abnormal.Meanwhile, also avoid measurement environment severe, joint connection in site circuit, length of pipe restriction, the PH meter electrode forming can not be stablized the situation that standard solution is demarcated that is placed in, the efficiency of demarcating is high, completes online PH meter daily servicing, cleaning, demarcation, is conducive to extend the serviceable life of measuring equipment.In addition, this device is owing to having adopted the design of integrated type, and volume is little to be easy to carry, and uses and can supplement easily and change cleaning solution and standard solution for scene, therefore can use in batches at the scene.
Claims (6)
1. a portable PH meter caliberating device, comprise a liquid pool for packing a standard solution into, for packing No. two liquid pools of No. two standard solution into, for packing No. three liquid pools of cleaning solution and the PH instrumentation amount flow cell of measuring for PH into, described PH meter electrode is positioned in PH instrumentation amount flow cell, it is characterized in that:
This device also comprises the first valve, the second valve, measuring media outlet valve and measuring media inlet valve, a described liquid pool, No. two liquid pools and No. three liquid pools are provided with liquid outlet, each described liquid outlet is communicated with described PH instrumentation amount flow cell by corresponding pipeline respectively, on each described pipeline, be provided with solenoid valve, the entrance of described the first valve is communicated with each described solenoid valve, and the outlet of described the first valve is communicated with PH instrumentation amount flow cell;
On the pipeline that described PH instrumentation amount flow cell is connected with the first valve, be also connected with the first discharging tube, described measuring media outlet valve is arranged on the first described discharging tube; Described PH instrumentation amount flow cell is also connected with the second discharging tube, and the second described valve is arranged on the second described discharging tube; On the pipeline that described PH instrumentation amount flow cell is connected with the second valve, be also connected with measuring media stopple coupon, described measuring media inlet valve is arranged on described measuring media stopple coupon.
2. portable PH meter caliberating device according to claim 1, is characterized in that the entrance of described measuring media inlet valve is communicated with measuring media sample cock, and the outlet of measuring media inlet valve is communicated with described PH instrumentation amount flow cell.
3. portable PH meter caliberating device according to claim 1, is characterized in that the entrance of described measuring media outlet valve is communicated with described PH instrumentation amount flow cell, and the outlet of described measuring media outlet valve is communicated with the leakage fluid dram of the first discharging tube.
4. portable PH meter caliberating device according to claim 1, is characterized in that the entrance of the second described valve is communicated with described PH instrumentation amount flow cell, and the outlet of the second described valve is communicated with the leakage fluid dram of the second discharging tube.
5. portable PH meter caliberating device according to claim 1, it is characterized in that described PH meter electrode is communicated with No. four liquid pools that damping fluid is housed by buffer pipe, and PH meter electrode is connected with display by electrode connecting line.
6. portable PH meter caliberating device according to claim 1, is characterized in that described cleaning solution is distilled water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420086989.8U CN203772794U (en) | 2014-02-27 | 2014-02-27 | Portable PH meter calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420086989.8U CN203772794U (en) | 2014-02-27 | 2014-02-27 | Portable PH meter calibration device |
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| Publication Number | Publication Date |
|---|---|
| CN203772794U true CN203772794U (en) | 2014-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420086989.8U Expired - Fee Related CN203772794U (en) | 2014-02-27 | 2014-02-27 | Portable PH meter calibration device |
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| Country | Link |
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| CN (1) | CN203772794U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177285A (en) * | 2015-10-30 | 2015-12-23 | 攀钢集团西昌钢钒有限公司 | Method for controlling stability of pH of slurry in leaching process of vanadium oxide production technology |
| CN107449818A (en) * | 2017-08-08 | 2017-12-08 | 安吉元融仪器仪表检测有限公司 | The calibration method of easy to operate PH meters |
| CN108572000A (en) * | 2017-03-07 | 2018-09-25 | 中国科学院寒区旱区环境与工程研究所 | One kind being used for river water sample collection and field assay device |
| CN111060561A (en) * | 2019-12-31 | 2020-04-24 | 陕西中良智能科技有限公司 | Device, method and system for monitoring ph value of liquid |
| CN111103338A (en) * | 2019-12-10 | 2020-05-05 | 南京理工大学 | Multi-mode automatic pH measuring instrument based on network and measuring method thereof |
-
2014
- 2014-02-27 CN CN201420086989.8U patent/CN203772794U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177285A (en) * | 2015-10-30 | 2015-12-23 | 攀钢集团西昌钢钒有限公司 | Method for controlling stability of pH of slurry in leaching process of vanadium oxide production technology |
| CN108572000A (en) * | 2017-03-07 | 2018-09-25 | 中国科学院寒区旱区环境与工程研究所 | One kind being used for river water sample collection and field assay device |
| CN107449818A (en) * | 2017-08-08 | 2017-12-08 | 安吉元融仪器仪表检测有限公司 | The calibration method of easy to operate PH meters |
| CN111103338A (en) * | 2019-12-10 | 2020-05-05 | 南京理工大学 | Multi-mode automatic pH measuring instrument based on network and measuring method thereof |
| CN111060561A (en) * | 2019-12-31 | 2020-04-24 | 陕西中良智能科技有限公司 | Device, method and system for monitoring ph value of liquid |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20170227 |