CN205691527U - A kind of precipitation on-line monitoring system - Google Patents

A kind of precipitation on-line monitoring system Download PDF

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Publication number
CN205691527U
CN205691527U CN201620108780.6U CN201620108780U CN205691527U CN 205691527 U CN205691527 U CN 205691527U CN 201620108780 U CN201620108780 U CN 201620108780U CN 205691527 U CN205691527 U CN 205691527U
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module
sample
valve
measuring flume
precipitation
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潘志东
杨波
柳世波
吴程
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Zhejiang Hengda Instrument Co Ltd
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Zhejiang Hengda Instrument Co Ltd
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Abstract

A kind of precipitation on-line monitoring system, include a rain collecting and conveyor module, one EC/pH measurement module, one ion detection sample treatment module, one reagent aspiration and ion detection sample introduction module, by the switching of 6 measurement switching valves in described rain collecting and conveyor module, control rainwater and be delivered to EC/pH measurement module and ion detection sample treatment module respectively;This utility model has the advantages that;The on-line automatic measurement function of precipitation sample intermediate ion component can be realized;The automatic calibration function of pH electrode can be realized;Feasible system rainwater pipeline and the automatic cleaning function of reagent cartridge.

Description

A kind of precipitation on-line monitoring system
Technical field
This utility model relates to a kind of precipitation on-line monitoring system and method, belongs to environmental conservation and detection device technique neck Territory.
Background technology
Acid rain is the big important environmental problem that China is faced, and Rainfall Monitoring is in China environmental protection work Vital task.Along with China's automatic technology and the development of analysis and detection technology, Rainfall Monitoring experienced by artificial sample monitoring, Automatically the manual monitoring of sampling, on-line monitoring three phases.Precipitation on-line monitoring system composition is relatively simple the most both at home and abroad.
Above-mentioned on-line monitoring system operation principle illustrates: in connecing rain drain bucket, rainwater is delivered to through sample extraction peristaltic pump pumps Conductivity measurement groove and pH measuring flume, complete pH value and conductance in rainwater sample by conductivity measurement electrode and pH-measuring electrode The mensuration of rate value;By keeping sample/measure switching Vavle switching, part rainwater is kept sample interface collection by system, and by monitoring personnel The anions and canons component in rainwater analyzed further by band to laboratory.
There is some deficiency following in current which: 1, rainwater is the most dirty during site transport to laboratory Dye, affects the representativeness of rainwater sample;2, the detection of rainwater ion uses the ion detection instrument of specialty, the behaviour to experimenter Make skill set requirements the highest, be readily incorporated manual operation error;3, the manual detection work amount of rainwater ion is big, and artificial input is big; 4, pH electrode lacks calibration automatically, and calibration maintenance workload is big;5, rainwater pipeline lacks cleaning, and the impact on sample is bigger.
Utility model content
The purpose of this utility model is to overcome deficiency of the prior art, it is provided that one can realize zwitterion in rainwater The system and method that on-line monitoring and pH electrode are calibrated automatically.
System of the present utility model forms as shown in Figure 1:
In figure 1: connect rain drain bucket;2: draining electrical ball valve;3: rain water filtering device;4: sample/cleaning switching valve;5: sample Pump;6: measure switching valve;7: keep sample switching valve;8: ultrafiltration module;9: ultrafiltration module drain valve;10: ultrafiltrate pump;11: sample cell; 12: sample cell liquid level detection device;13: conductivity measurement electrode;14:pH measures electrode;15: conductivity measurement groove drain valve; 16:pH measuring flume drain valve;17: syringe pump;18: multi-channel direction selecting valve;19: air ring;20: Precerving liquid draw-off pump;21: connect rain Funnel drain valve;22:pH Precerving liquid;23:pH calibration solution 1;24:pH calibration solution 2;25:pH calibration solution 3;26: pure water/air is cut Change valve;27: pure water;28: cation detection module;29: Anionic recognition module;30: cation injection annulus;31: anion is entered Sample ring;32:pH measuring flume;33:EC measuring flume.
Native system is taken out by rain collecting and conveyor module, EC/pH measurement module, ion detection sample treatment module, reagent Take and ion detection sample introduction module, pipeline-cleaning module, pH maintenance module composition, the module that keeps sample composition.
This utility model technical characteristic 1 rain collecting and conveyor module: this module is connect rain drain bucket, 2 draining electric balls by 1 Valve, 3 rain water filtering devices, 4 samples/cleaning switching valve, 5 sample pumps, 6 measure switching valves, 21 connect rain drain bucket drain valve composition.2 rows Water electrical ball valve is positioned at 1 lower section connecing rain drain bucket, and in control 1 connects rain drain bucket, rainwater down carries;3 rain water filtering devices are positioned at Between 2 draining electrical ball valves and 4 samples/cleaning switching valve, for the preliminary coarseparticulate filtered in rainwater;5 sample pumps are positioned at 4 Sample/cleaning switches valve and 6 and measures between switching valves composition, the power that rainwater down carries in offer 1 connects rain drain bucket, and Rainwater can be controlled be delivered to EC/pH measurement module and ion detection sample treatment mould respectively by the switching of 6 measurement switching valves Block;21 connect rain drain bucket drain valve is positioned at the lower section of 2 draining electrical ball valves, opens 21 simultaneously and connects rain drain bucket drain valve and 2 drainings electricity In dynamic ball valve can connect rain drain bucket by 1, unnecessary rainwater sample directly emits.
This utility model technical characteristic 2 EC/pH measurement module: this module is by 13 conductivity electrode, 14pH electrode, 32pH Measuring flume, 33 conductivity measurement grooves, 15 conductivity measurement groove drain valves, 16pH measuring flume drain valve form.32pH measuring flume position In the rear end of 33 conductivity measurement grooves, the interference that EC is measured by potassium chloride Precerving liquid in pH measuring flume can be avoided;13 electro conductivities Pole and 14pH electrode lay respectively at inside 33 conductivity measurement grooves and 32pH measuring flume, can realize electrical conductivity and the inspection of pH in precipitation Survey;15 conductivity measurement groove drain valves, 16pH measuring flume drain valve lay respectively at 33 conductivity measurement grooves and 32pH measuring flume Bottom, can control the automatic-discharging of its internal rainwater sample.
This utility model technical characteristic 3 ion detection sample treatment module: this module is by 8 ultrafiltration modules, 9 ultrafiltration modules Drain valve, 10 ultrafiltrate pumps, 11 sample cells, 12 sample cell liquid level detection device compositions.Wherein 8 ultrafiltration modules comprise ultrafiltration filter membrane group Part, filtering accuracy is better than 0.45 μm, and this filters is for the function of bottom aeration cleaning filter membranes;10 ultrafiltrate pumps are positioned at 8 ultrafiltration Between assembly and 11 sample cells, extract the rainwater sample in 8 ultrafiltration modules after ultrafiltration membrane filtration, enter 11 sample cells;11 samples In product groove, amount of rainfall is adjusted by regulating 12 sample cell liquid level detection device positions, and the rainwater after ultrafiltration enters 11 sample cells Time, system controls the work of 10 ultrafiltrate pumps by detection liquid level detection device signal in real time, when system detects liquid level signal Wait, stop 10 ultrafiltrate pumps immediately;Sample stands after entering 11 sample cells, fully discharges the air of sample interior.
This utility model technical characteristic 4 reagent aspiration and ion detection sample introduction module: this module by 17 syringe pumps, more than 18 Passage selection valve, 19 air rings, 23pH calibration solution 1,24pH calibration solution 2,25pH calibration solution 3,27 pure water, 28 cation detection moulds Block, 29 Anionic recognition modules, 30 cation injection annulus, 31 anion injection annulus compositions.Wherein 17 syringe pumps are reagent aspiration Thering is provided power, its sample export is placed down, and 19 air ring two ends connect 18 multi-channel direction selecting valve common ports and 17 injections respectively The OUT terminal of pump, when syringe pump extracts sample every time, first extracts the air in air ring to syringe, then proceedes to take out Taking fluid sample in syringe, because atmospheric density is less than liquid, therefore air always remains at above fluid sample, works as syringe pump Outward during conveying fluid sample, can guarantee that fluid sample is first carried, the air in syringe pump is returned to again in former air ring, And the always air of dead volume internal residual intrinsic in syringe pump, so that it is guaranteed that extraction and the course of conveying of sample are injected every time No liquid residual in device;The interface end of 18 multi-channel direction selecting valves respectively with 32pH measuring flume, 11 sample cells, 23pH calibration solution 1, 24pH calibration solution 2,25pH calibration solution 3, waste liquid port, 30 cation injection annulus, air connect;The IN end of 27 pure water and 17 syringe pumps Connect, after syringe pump extracts liquid every time and conveying completes, all can successively extract 27 pure water and airs to syringe, air ring and Liquid transmission pipeline is carried out and purges;30 cation injection annulus, 31 anion injection annulus lay respectively at 28 cation detections Module, 29 Anionic recognition inside modules, and 30 cation injection annulus are positioned at 31 anion injection annulus front ends, can avoid 29 the moon from The interference that 28 cation detection modules are measured by the internal leacheate cationic of sub-detection module.
This utility model technical characteristic 5 pipeline-cleaning module: this module by 4 samples/cleaning switching valve, 5 sample pumps, 6 Measure switching valve, 27 pure water, 26 pure water/air switching valve composition.Wherein 26 pure water/air switching valve is positioned at 27 pure water and 4 samples Between product/cleaning switching valve.By controlling 4 samples/cleaning switching valve, 6 measurements switch valves, 26 pure water/air switches the dynamic of valve Make to switch and the extraction action of 5 sample pumps, the cleaning to rainwater analysis of pipeline and purging function can be realized.
This utility model technical characteristic 6 pH maintains module: this module is by 20pH Precerving liquid draw-off pump, 22pH Precerving liquid group Become.Wherein 20pH Precerving liquid draw-off pump is between 22pH Precerving liquid and 32pH measuring flume, can by 20pH Precerving liquid draw-off pump Extraction 22pH Precerving liquid is to 32pH measuring flume, it is achieved the maintenance function of pH electrode.
This utility model technical characteristic 7 keeps sample module: this module is kept sample/measure switching valve by 7 and respective line forms. Wherein 7 keep sample/measure switching valve 6 measure switching valves and 8 ultrafiltration modules between, by open 7 keep sample/measure switching valve can Realize the function that keeps sample of gathered rainwater.
Effect of the present utility model is:
1, the on-line automatic measurement function of precipitation sample intermediate ion component can be realized;
2, the automatic calibration function of pH electrode can be realized;
3, feasible system rainwater pipeline and the automatic cleaning function of reagent cartridge.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation.
Detailed description of the invention
Embodiment one: population parameter detection in precipitation sample
Mission requirements: realize the automatic collection of precipitation sample, and automatically measure the pH in precipitation sample, electrical conductivity, water temperature, Fluorinion concentration, chlorine ion concentration, nitrate ion concentration, sulfate ion concentration, Na ion concentration, ammonium concentration, potassium Ion concentration, magnesium ion concentration, calcium ion concentration.
1, precipitation gathers automatically: during precipitation, and 1 connects rain drain bucket collects precipitation automatically;When stopping precipitation, 1 connects rain drain bucket stops Collect precipitation;Connect rain drain bucket and collect the precipitation in environment according to this mode duration;
2, precipitation sample automatic transport: when reaching the measurement time of default, 2 draining electrical ball valves are opened, and 1 connects rain Rainwater sample in funnel is extracted by 5 sample pumps, sequentially passes through 3 rain water filtering devices, 4 samples/cleaning switching valve, 6 measurement switchings Valve, 7 keep sample switching valve enter 8 ultrafiltration modules;Switching 6 measurement switching valve, 1 connects the rainwater sample in rain drain bucket by 5 sample pumpings Take, sequentially pass through 3 rain water filtering devices, 4 samples/cleaning switching valve, 6 measurement switching valves successively entrance 33EC measuring flumes and 32pH and survey Measuring tank;
3, EC/pH detection: 13EC electrode and 14pH electrode are respectively to the rainwater sample in 33EC measuring flume and 32pH measuring flume The electrical conductivity of product, water temperature and pH detect;
4, ion detection rainwater sample treatment: rainwater stands 5min in 8 ultrafiltration modules, during precipitation removes sample further Granule after, open the water sample in 10 ultrafiltrate pump negative pressure extracting 8 ultrafiltration modules, this water sample is delivered to 11 after ultrafiltration membrane filtration Sample cell, 12 sample cell liquid level detection devices detect the liquid level in 11 sample cells in real time, when 12 sample cell liquid level detection devices are examined When measuring liquid level, stopping 10 ultrafiltrate pumps, in 11 sample cells, water sample continues to stand 5min, fully removes the bubble in water sample;
5, ion detection sample introduction: 17 syringe pumps outlet three-way valve switch to OUT terminal, 18 multi-channel direction selecting valves common port Switch to 11 sample cells, open 17 syringe pumps and extract sample 25ml in 11 sample cells;18 multi-channel direction selecting valves public end-grain cutting Shifting to connect with 30 cation injection annulus, 17 syringe pump conveying samples are to 30 cation injection annulus and 31 anion injection annulus, complete Paired 28 cation detection modules and the sample introduction of 29 Anionic recognition modules;
6, ion detection: system opens 28 cation detection modules and 29 Anionic recognition modules, respectively to rainwater sample Cationic (comprising sodium ion, ammonium ion, potassium ion, magnesium ion and calcium ion) and anion (fluorion, chloride ion, nitric acid Radical ion and sulfate ion) detect;
7, system keeps sample: when selection system keeps sample function, and 2 draining electrical ball valves are opened, and switching 7 keeps sample switching valve to staying Sample interface, the 1 rainwater sample connect in rain drain bucket is extracted by 5 sample pumps, sequentially passes through 3 rain water filtering devices, 4 samples/cleaning switching Valve, 6 measure switching valves, the 7 switching valves that keep sample enter and keep sample interface;
8, system evacuation: after ion detection completes, open 9 ultrafiltration module drain valves, 15 conductivity measurement groove drain valves, 16pH measuring flume drain valve, 21 connect rain drain bucket drain valve, respectively to 8 ultrafiltration modules, 33EC measuring flume, 32pH measuring flume, 1 connect rain In funnel, rainwater sample empties;
9, reagent cartridge chromatograph sample introduction pipeline-cleaning: 17 syringe pump outlet three-way valve switch to IN end, 17 syringe pumps Outlet three-way valve extracts 27 pure water 25ml;17 syringe pump outlet three-way valve switch to OUT terminal, the common port of 18 multi-channel direction selecting valves Switch to and 30 cation injection annulus connect, 17 syringe pumps conveying pure water to 30 cation injection annulus and 31 anion injection annulus, Complete 30 cation injection annulus and the cleaning of 31 anion injection annulus;The common port of 18 multi-channel direction selecting valves switches to and air Connect, 17 syringe pump extraction air 25ml;The common port of 18 multi-channel direction selecting valves switches to connect with 30 cation injection annulus, and 17 Syringe pump conveying air, to 30 cation injection annulus and 31 anion injection annulus, completes 30 cation injection annulus and 31 aniones The purging of injection annulus, fully removes the liquid of its channel interior residual;
10, reagent cartridge sample cell cleans: 17 syringe pump outlet three-way valve switch to IN end, 17 syringe pump outlets three Logical valve extracts 27 pure water 25ml;17 syringe pump outlet three-way valve switch to OUT terminal, and the common port of 18 multi-channel direction selecting valves switches to Connecting with 11 sample cells, 17 syringe pump conveying pure water are to 11 sample cells;After pure water and sample cell are fully contacted and stand 5min, 17 Syringe pump extracts the pure water in 11 sample cells;The common port of 18 multi-channel direction selecting valves switches to connect with waste liquid port, 17 syringe pumps The pure water extracted inside it is emitted into waste liquid port;
11, rainwater pipeline-cleaning: switching 4 samples/cleaning switching valve to cleaning interface, pure water extracts through 5 sample pumps, through 26 Pure water/air switching valve, 4 samples/cleanings switching valve, 6 measuring switching valves, 7 keep sample and switch valve to 8 ultrafiltration modules, pure water is abundant Soak 8 ultrafiltration module 5min;Switching 6 measurement switching valve, pure water extracts through 5 sample pumps, through 26 pure water/air switching valve, 4 samples Product/cleaning switching valve, 6 measurement switching valves carry out soaking and washing to 33EC measuring flume, 32pH measuring flume;Switch 26 pure water/air Switching valve, 8 ultrafiltration modules, 33 EC measuring flumes, 32pH measuring flume are entered the most respectively by air through 5 sample pump extractions Sample pipeline purges;After having purged, open 9 ultrafiltration module drain valves, 15 conductivity measurement groove drain valves, 16pH measuring flume Drain valve, empties 8 ultrafiltration modules, 33EC measuring flume and 32pH measuring flume respectively;
12, system maintenance: switch 4 samples/cleaning switching valve, pure water extracts through 5 sample pumps, through 26 pure water/air switching Valve, 4 samples/cleaning switching valve, 6 measure switching valves, its inside ultrafiltration filter membrane is soaked by the 7 switching valves that keep sample to 8 ultrafiltration modules Bubble maintenance;Switching 6 measurement switching valve, pure water extracts through 5 sample pumps, through 26 pure water/air switching valve, 4 samples/cleaning switching Valve, 6 measurement switching valves enter 33EC measuring flume, 32pH measuring flume;Open 16pH measuring flume drain valve, pure water in 32pH measuring flume After emptying, closing 16pH measuring flume drain valve, open 20 Precerving liquid draw-off pumps, extraction 22pH Precerving liquid is to 32pH measuring flume pair 14pH measures electrode and maintains.
Embodiment two: pH electrode is calibrated automatically
Task description: realize three point auto-calibration functions of pH electrode.When starting after automatic calibration tasks, system according to Lower step performs:
1, extraction pH1 calibration solution: 17 syringe pump outlet three-way valve switch to OUT terminal, the common port of 18 multi-channel direction selecting valves Switching to connect with 23pH calibration solution 1,17 syringe pumps extract 23 pH calibration solution 1 15ml;The common port of 18 switches to and 32pH Measuring flume is connected, and 17 syringe pumps carry its internal liquid and connect to 32 pH measuring flumes;
2, the pH1 calibration solution in 14pH electrode measurement 32pH measuring flume, obtains and measures signal;
3, pH calibrates pipeline-cleaning: 17 syringe pump outlet three-way valve switch to IN end, and 17 syringe pumps extract 27 pure water 25ml; 17 syringe pump outlet three-way valve switch to OUT terminal, and the common port of 18 multi-channel direction selecting valves switches to connect with 32pH measuring flume, and 17 Syringe pump conveying pure water 25ml to 32pH measuring flume, completes 32pH measuring flume and the cleaning of calibrating reagent pipeline thereof;18 manifold The common port of road selection valve switches to connect with air, 17 syringe pump extraction air 25ml;The common port of 18 multi-channel direction selecting valves Switching to connect with 32pH measuring flume, 17 syringe pump conveying air, to 32pH measuring flume, complete 32pH measuring flume and calibration thereof The purging of reagent cartridge;
4, extraction pH2 calibration solution: 17 syringe pump outlet three-way valve switch to OUT terminal, the common port of 18 multi-channel direction selecting valves Switching to connect with 24pH calibration solution 2,17 syringe pumps extract 24 pH calibration solution 2 15ml;The common port of 18 switches to and 32pH Measuring flume is connected, and 17 syringe pumps carry its internal liquid and connect to 32 pH measuring flumes;
5, the pH2 calibration solution in 14pH electrode measurement 32pH measuring flume, obtains and measures signal;
6, pH calibrates pipeline-cleaning: 17 syringe pump outlet three-way valve switch to IN end, and 17 syringe pumps extract 27 pure water 25ml; 17 syringe pump outlet three-way valve switch to OUT terminal, and the common port of 18 multi-channel direction selecting valves switches to connect with 32pH measuring flume, and 17 Syringe pump conveying pure water 25ml to 32pH measuring flume, completes 32pH measuring flume and the cleaning of calibrating reagent pipeline thereof;18 manifold The common port of road selection valve switches to connect with air, 17 syringe pump extraction air 25ml;The common port of 18 multi-channel direction selecting valves Switching to connect with 32pH measuring flume, 17 syringe pump conveying air, to 32pH measuring flume, complete 32pH measuring flume and calibration thereof The purging of reagent cartridge;
7, extraction pH3 calibration solution: 17 syringe pump outlet three-way valve switch to OUT terminal, the common port of 18 multi-channel direction selecting valves Switching to connect with 25pH calibration solution 3,17 syringe pumps extract 25 pH calibration solution 3 15ml;The common port of 18 switches to and 32pH Measuring flume is connected, and 17 syringe pumps carry its internal liquid and connect to 32 pH measuring flumes;
8, the pH3 calibration solution in 14pH electrode measurement 32pH measuring flume, obtains and measures signal;
9, pH calibrates pipeline-cleaning: 17 syringe pump outlet three-way valve switch to IN end, and 17 syringe pumps extract 27 pure water 25ml; 17 syringe pump outlet three-way valve switch to OUT terminal, and the common port of 18 multi-channel direction selecting valves switches to connect with 32pH measuring flume, and 17 Syringe pump conveying pure water 25ml to 32pH measuring flume, completes 32pH measuring flume and the cleaning of calibrating reagent pipeline thereof;18 manifold The common port of road selection valve switches to connect with air, 17 syringe pump extraction air 25ml;The common port of 18 multi-channel direction selecting valves Switching to connect with 32pH measuring flume, 17 syringe pump conveying air, to 32pH measuring flume, complete 32pH measuring flume and calibration thereof The purging of reagent cartridge;
10, output calibration result: according to pH1 calibration solution, pH2 calibration solution, the measurement result of pH3 calibration solution, output calibration Result;
11, system maintenance: open 20 Precerving liquid draw-off pumps, 14pH is measured electricity to 32pH measuring flume by extraction 22pH Precerving liquid Pole is maintained.

Claims (8)

1. a precipitation on-line detecting system, includes;
One rain collecting and conveyor module, this module is by connecing rain drain bucket (1), draining electrical ball valve (2), rain water filtering device (3), clear Wash switching valve (4), sample pump (5), measurement switching valve (6), connect rain drain bucket drain valve (21) composition;
One EC/pH measurement module, this module is by conductivity electrode (13), pH electrode (14), pH measuring flume (32), conductivity measurement Groove (33), conductivity measurement groove drain valve (15), pH measuring flume drain valve (16) composition;
One ion detection sample treatment module, this module by ultrafiltration module (8), ultrafiltration module drain valve (9), ultrafiltrate pump (10), Sample cell (11), sample cell liquid level detection device (12) form;
One reagent aspiration and ion detection sample introduction module, this module is by syringe pump (17), multi-channel direction selecting valve (18), air ring (19), pH calibration solution 1 (23), pH calibration solution 2 (24), pH calibration solution 3 (25), pure water (27), cation detection module (28), the moon Ion detection module (29), cation injection annulus (30), anion injection annulus (31) form;
By measuring the switching of switching valve (6) in described rain collecting and conveyor module, control rainwater and be delivered to EC/pH respectively Measurement module and ion detection sample treatment module.
Precipitation on-line detecting system the most according to claim 1, it is characterised in that also include:
One pipeline-cleaning module, this module is by sample/cleaning switching valve (4), sample pump (5), measurement switching valve (6), pure water (27), pure water/air switching valve (26) composition;
Maintaining module with a pH, this module is made up of pH Precerving liquid draw-off pump (20), pH Precerving liquid (22).
Precipitation on-line detecting system the most according to claim 1, it is characterised in that reagent aspiration and ion detection sample introduction mould In block, syringe pump (17) provides power for reagent aspiration, and its sample export is placed down, and air ring (19) two ends connect many respectively Passage selection valve (18) common port and the OUT terminal of syringe pump (17).
Precipitation on-line detecting system the most according to claim 1, it is characterised in that draining in rain collecting and conveyor module Electrical ball valve (2) is positioned at the lower section connecing rain drain bucket (1), and rain water filtering device (3) is positioned at draining electrical ball valve (2) and sample/cleaning Between switching valve (4), sample pump (5) is positioned at sample/cleaning switching valve (4) and measures between switching valve (6) composition, connects rain drain bucket Drain valve (21) is positioned at the lower section of draining electrical ball valve (2).
Precipitation on-line detecting system the most according to claim 1, it is characterised in that pH measuring flume in EC/pH measurement module (32) it is positioned at the rear end of conductivity measurement groove (33), conductivity electrode (13) and pH electrode (14) and lays respectively at conductivity measurement groove (33) and pH measuring flume (32) is internal, conductivity measurement groove drain valve (15), pH measuring flume drain valve (16) lay respectively at conductance Rate measuring flume (33) and the bottom of pH measuring flume (32).
Precipitation on-line detecting system the most according to claim 1, it is characterised in that super in ion detection sample treatment module Filter pump (10) is positioned between ultrafiltration module (8) and sample cell (11), and the rainwater sample in extraction ultrafiltration module (8) is through ultrafiltration filter membrane Sample cell (11) is entered after filtration;Sample cell (11) interior amount of rainfall is carried out by regulation sample cell liquid level detection device (12) position Regulation, when the rainwater after ultrafiltration enters sample cell (11), system controls ultrafiltrate pump by detection liquid level detection device signal in real time (10) work, when system detects liquid level signal time, stops ultrafiltrate pump (10) immediately;It is the most quiet that sample enters sample cell (11) Put, fully discharge the air of sample interior.
Precipitation on-line detecting system the most according to claim 1, it is characterised in that reagent aspiration and ion detection sample introduction mould In block the interface end of multi-channel direction selecting valve (18) respectively with pH measuring flume (32), sample cell (11), pH calibration solution 1 (23), pH school Quasi-liquid 2 (24), pH calibration solution 3 (25), waste liquid port, cation injection annulus (30), air connect;Pure water (27) and syringe pump (17) IN end connect, cation injection annulus (30), anion injection annulus (31) lay respectively at cation detection module (28), anion Detection module (29) is internal, and cation injection annulus (30) is positioned at anion injection annulus (31) front end.
Precipitation on-line detecting system the most according to claim 2, it is characterised in that in described pipeline-cleaning module, pure Water/air switching valve (26) is positioned between pure water (27) and sample/cleaning switching valve (4);
Described pH maintains module, wherein pH Precerving liquid draw-off pump (20) be positioned at pH Precerving liquid (22) and pH measuring flume (32) it Between.
CN201620108780.6U 2016-02-03 2016-02-03 A kind of precipitation on-line monitoring system Active CN205691527U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105758890A (en) * 2016-02-03 2016-07-13 浙江恒达仪器仪表股份有限公司 Online rainfall monitoring system and online rainfall monitoring method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105758890A (en) * 2016-02-03 2016-07-13 浙江恒达仪器仪表股份有限公司 Online rainfall monitoring system and online rainfall monitoring method

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