CN104897669A - Three-way valve metering device of online water quality monitor - Google Patents
Three-way valve metering device of online water quality monitor Download PDFInfo
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- CN104897669A CN104897669A CN201510354040.0A CN201510354040A CN104897669A CN 104897669 A CN104897669 A CN 104897669A CN 201510354040 A CN201510354040 A CN 201510354040A CN 104897669 A CN104897669 A CN 104897669A
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Abstract
The invention discloses a three-way valve metering device of an online water quality monitor. The three-way valve metering device comprises a peristaltic pump and a multiport valve, each reagent port of the multiport valve is communicated with a corresponding reagent barrel through a reagent channel, and a waste liquid port of the multiport valve is communicated with a waste liquid barrel through a waste liquid channel. A liquid level detecting device and two three-way valves are arranged between the peristaltic pump and the multiport valve, normally-open ports of the two three-way valves are communicated through a right flow passage tube, normally-closed ports of the two three-way valves are communicated through a left flow passage tube, a public port of one three-way valve is communicated with the bottom end of the liquid level detecting device through a hose, and the public port of the other three-way valve is communicated with a center hole of the multiport valve through the hose; the top end of the liquid level detecting device is communicated with the peristaltic pump through a peristaltic pump tube. The three-way valve metering device is accurate in quantification, convenient to operate, low in fault rate and flexible and changeable in sample amount.
Description
Technical field
The present invention relates to the accurate measuring device of liquid, be particularly applied to the measuring apparatus of water quality on-line monitoring instrument.
Background technology
In monitoring water quality on line field, mostly adopt chemical analysis to measure water quality parameter, this needs plurality of reagents and sample usually, and often kind of reagent and the amount required for sample may be also different, and this just relates to the problem of metering.But in actual monitoring process, water sample sample and the inaccurate of reagent sample introduction are one of main sources of quantitative test error; Meanwhile, temperature during material, the sample introduction of the principle of sampling system, structure, use, sample size, sample introduction speed all can have a direct impact the repeatability of analysis result and accuracy.
At present, water quality online automatic monitor on market mainly adopts peristaltic pump and these two kinds of modes of rotary valve to carry out the sample size of meters reagents, peristaltic pump measures by its revolution and frequency, the scope of meters reagents is 1 ~ 5mL, error in dipping is ± 0.1 mL, because the wearing and tearing of pump line and the deviation of peristaltic pump roller can cause metric results inaccurate, and easily judge by accident.And the method for rotary valve meters reagents, also there is the inaccurate shortcoming of metering, there is the shortcomings such as complex structure, easy to wear, repairing difficulty, maintenance cost are high simultaneously.
Summary of the invention
The technical issues that need to address of the present invention are to provide the T-valve measuring apparatus of a kind of quantitatively accurate, easy to operate, sample introduction water quality on-line monitoring instrument rapidly, and the multiparameter that can realize water quality detects simultaneously, and can effectively avoid cross pollution between stream.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows.
The T-valve measuring apparatus of water quality on-line monitoring instrument, comprises peristaltic pump and multiport valve, and each reagent mouth of multiport valve is communicated with corresponding reagent bucket respectively by reagent passage, and the waste liquid port of multiport valve is communicated with waste liquid barrel by waste fluid channel; Liquid level detection device and two T-valve are also provided with between peristaltic pump and multiport valve, the often ported of two T-valve is communicated with by right side flow channel tube, the normally closed port of two T-valve is communicated with by left side flow channel tube, the public port of a T-valve passes through the bottom of soft pipe connection liquid level detection device, and the public port of another T-valve passes through the center pit of soft pipe connection multiport valve; The top of described liquid level detection device is communicated with peristaltic pump by peristaltic pump tube.
The T-valve measuring apparatus of above-mentioned water quality on-line monitoring instrument, described multiport valve by colorimetric channel connection colorimetric pool, describedly clears up valve than chrominance channel being provided with colorimetric.
The T-valve measuring apparatus of above-mentioned water quality on-line monitoring instrument, described right side flow channel tube and left side flow channel tube are corrosion-resistant flexible pipe, and internal diameter is 1 ~ 2mm.
The T-valve measuring apparatus of above-mentioned water quality on-line monitoring instrument, described liquid level detection device comprises housing, is provided with diaphanometer buret in housing, the corresponding photoemitter in the left and right sides of gauge line and photelectric receiver on housing.
The T-valve measuring apparatus of above-mentioned water quality on-line monitoring instrument, described photoemitter and photelectric receiver are provided with two covers, are separately positioned on the two ends up and down of gauge line.
Owing to have employed above technical scheme, the invention technological progress is as follows.
The way selection metering liquid that the present invention switches by controlling T-valve, utilizes the length of T-valve connecting hose and Cross section calculation flexible pipe volume to carry out quantitative liquid volume, has quantitatively accurate, failure rate is low, sample size flexibility and changeability.The scope of metering of the present invention is 0.1 ~ 10 mL, and error in dipping is less than ± 0.01 mL, can accurate measurement micro liquid, makes the data of analysis more accurate; And liquid residue in flexible pipe is little; Reproducible.In testing process, because T-valve is arranged between liquid level detection device and multiport valve, can not by the pressure influence of peristaltic pump, therefore metric results is very accurate.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Wherein: 1. peristaltic pump, 2. photoemitter, 3. photelectric receiver, 4. liquid level detection device, 5. public port, flow channel tube 6., 7. flow channel tube on the left of, 8. often ported, 9. normally closed port, 10. center pit, 11. reagent passage, 12. T-valve, 13. multiport valves, 14. waste fluid channel, 15. compare chrominance channel, 16. colorimetrics clear up valve, 17. colorimetric pools.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further elaborated.
A T-valve measuring apparatus for water quality on-line monitoring instrument, its structure as shown in Figure 1, comprises peristaltic pump 1, liquid level detection device 4, multiport valve 13 and two T-valve 12.
Each T-valve comprises a normally closed port, a normal ported and public port, and the often ported of two T-valve is communicated with by right side flow channel tube 6, and gageable liquid volume is 1 ~ 10 mL; The normally closed port of two T-valve is communicated with by left side flow channel tube 7, and gageable liquid volume is 0.1 ~ 1 mL.Wherein the public port of the first T-valve passes through the bottom of soft pipe connection liquid level detection device 4, and the public port of the second T-valve is by soft pipe connection multiport valve.
In the present invention, right side flow channel tube 6 and left side flow channel tube 7 are corrosion-resistant flexible pipe, can strong alkali-acid resistance, and internal diameter is 1 ~ 2mm, and the length of flow channel tube can do corresponding adjustment according to production actual needs.In testing process, the metering of reagent obtains flexible pipe volume by the length and cross section calculating flow channel tube between two T-valve, carrys out accurate measurement liquid volume further; T-valve is when off-position, and the reagent of extraction is by right side flow channel tube metered volume; T-valve is when "on" position, and reagent is by left side flow channel tube metered volume.
Multiport valve 13 comprises multiple reagent passage, waste fluid channel, one than chrominance channel and a center pit.Each reagent passage connects corresponding reagent bucket; Waste fluid channel connects waste liquid barrel; Colorimetric expanding channels colorimetric pool 17, clears up valve 16 than chrominance channel being provided with colorimetric; Center pit connects the public port of the second T-valve by flexible pipe.
Liquid level detection device comprises housing, is provided with diaphanometer buret in housing, and the bottom of diaphanometer buret is communicated with the public port of the first T-valve, and the top of diaphanometer buret connects peristaltic pump by peristaltic pump tube.On housing, the corresponding photoemitter 2 in the left and right sides of gauge line and photelectric receiver 3, be provided with two cover photoemitter and photelectric receivers altogether, be separately positioned on the two ends up and down of gauge line in the present embodiment.Liquid level detection device is used for having judged whether liquid process, if had, stops extracting reagent, prevents the liquid extracted from too much overflowing, shields.
The present invention for method of operating when measuring 10mL liquid is: T-valve no power, and now T-valve is by two normal ported and right side flow channel tube connecting fluid level detecting apparatus and multiport valves; The center pit of multiport valve is switched to reagent passage corresponding to required reagent, peristaltic pump rotates forward, reagent is extracted, right side flow channel tube is entered by the public port of the second T-valve, after the flow channel tube accurate measurement of right side, enter liquid level detection device by the public port of the first T-valve again, photoelectric sensor has judged whether liquid by opto-electronic receiver.After liquid level judges to terminate, T-valve is energized, and now T-valve is by two normally closed ports and left side flow channel tube connecting fluid level detecting apparatus and multiport valve; The center pit of multiport valve is switched to waste fluid channel, and peristaltic pump reverses, and the unnecessary reagent of metering is entered waste fluid channel, till draining through left side flow channel tube.After draining waste liquid, close T-valve, now T-valve is by two normal ported and right side flow channel tube connecting fluid level detecting apparatus and multiport valves; Switch to than chrominance channel by the center pit of multiport valve, open colorimetric simultaneously and clear up valve, peristaltic pump reverses, the reagent of metering from three-way valve device through being pressed into colorimetric pool than chrominance channel.
The present invention measures 0.1mL(1mL) liquid time method of operating be: T-valve be energized, now T-valve is by two normally closed ports and left side flow channel tube connecting fluid level detecting apparatus and multiport valve, the center pit of multiport valve is switched to reagent passage corresponding to required reagent, peristaltic pump rotates forward, reagent is extracted, left side flow channel tube is entered by the public port of the second T-valve, after the flow channel tube accurate measurement of left side, enter liquid level detection device again, photoelectric sensor has judged whether liquid by opto-electronic receiver.After liquid level judgement terminates, close T-valve, now T-valve is by two normal ported and right side flow channel tube connecting fluid level detecting apparatus and multiport valves, the center pit of multiport valve is switched to waste fluid channel, peristaltic pump reverses, the unnecessary reagent of metering is entered waste fluid channel, till draining through right side flow channel tube.After draining waste liquid, T-valve is energized, now T-valve is by two normally closed ports and left side flow channel tube connecting fluid level detecting apparatus and multiport valve, the center pit of multiport valve is switched to and compares chrominance channel, open colorimetric simultaneously and clear up valve, peristaltic pump reverses, the reagent of metering from three-way valve device through being pressed into colorimetric pool than chrominance channel.
Claims (5)
1. the T-valve measuring apparatus of water quality on-line monitoring instrument, comprise peristaltic pump (1) and multiport valve (13), each reagent mouth of multiport valve is communicated with corresponding reagent bucket respectively by reagent passage (11), and the waste liquid port of multiport valve is communicated with waste liquid barrel by waste fluid channel (14); It is characterized in that: between peristaltic pump (1) and multiport valve (13), be also provided with liquid level detection device (4) and two T-valve (12), the often ported of two T-valve is communicated with by right side flow channel tube (6), the normally closed port of two T-valve is communicated with by left side flow channel tube (7), the public port of one of them T-valve passes through the bottom of soft pipe connection liquid level detection device (4), and the public port of another T-valve passes through the center pit (10) of soft pipe connection multiport valve; The top of described liquid level detection device is communicated with peristaltic pump by peristaltic pump tube.
2. the T-valve measuring apparatus of water quality on-line monitoring instrument according to claim 1, is characterized in that: described multiport valve (13), by being communicated with colorimetric pool (17) than chrominance channel (15), describedly clears up valve (16) than chrominance channel being provided with colorimetric.
3. the T-valve measuring apparatus of water quality on-line monitoring instrument according to claim 1, is characterized in that: described right side flow channel tube (6) and left side flow channel tube (7) are corrosion-resistant flexible pipe, and internal diameter is 1 ~ 2mm.
4. the T-valve measuring apparatus of the water quality on-line monitoring instrument according to any one of claims 1 to 3, it is characterized in that: described liquid level detection device comprises housing, diaphanometer buret is provided with, the corresponding photoemitter (2) in the left and right sides of gauge line and photelectric receiver (3) on housing in housing.
5. the T-valve measuring apparatus of water quality on-line monitoring instrument according to claim 4, is characterized in that: described photoemitter and photelectric receiver are provided with two covers, is separately positioned on the two ends up and down of gauge line.
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| CN201510354040.0A CN104897669A (en) | 2015-06-25 | 2015-06-25 | Three-way valve metering device of online water quality monitor |
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| CN201510354040.0A CN104897669A (en) | 2015-06-25 | 2015-06-25 | Three-way valve metering device of online water quality monitor |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106744626A (en) * | 2016-12-13 | 2017-05-31 | 浙江微兰环境科技有限公司 | A kind of quantitative loop systems of list |
| CN106872452A (en) * | 2016-12-30 | 2017-06-20 | 中兴仪器（深圳）有限公司 | A kind of free chlorine in-line analyzer and its application method |
| CN109270284A (en) * | 2018-10-17 | 2019-01-25 | 安徽皖仪科技股份有限公司 | Quantitative sample injection and cleaning system |
| CN109596797A (en) * | 2019-02-15 | 2019-04-09 | 四川久环环境技术有限责任公司 | A kind of water quality on-line monitoring instrument video metering device |
| CN110208354A (en) * | 2019-04-02 | 2019-09-06 | 深圳市智创环保科技有限公司 | A kind of portable water quality in-line analyzer |
| CN110596306A (en) * | 2019-10-17 | 2019-12-20 | 苏州卫水环保科技有限公司 | Water quality detection pipeline system and water quality detection method |
| CN110862160A (en) * | 2019-11-29 | 2020-03-06 | 深圳一目科技有限公司 | Secondary water supply water quality monitoring waterway control system and control method thereof |
| CN112083119A (en) * | 2020-06-03 | 2020-12-15 | 杭州绿洁环境科技股份有限公司 | Permanganate index analyzer |
| CN113029955A (en) * | 2021-03-29 | 2021-06-25 | 江苏省环境监测中心 | Multichannel multithreading CODcr measurement system |
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| US5085831A (en) * | 1989-10-17 | 1992-02-04 | Nalco Chemical Company | Apparatus for continually and automatically measuring the level of a water treatment product in boiler feedwater |
| FR2705582A1 (en) * | 1993-05-25 | 1994-12-02 | Commissariat Energie Atomique | Automatic device for treatment using column chromatography, and liquid detector usable in such a device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106744626A (en) * | 2016-12-13 | 2017-05-31 | 浙江微兰环境科技有限公司 | A kind of quantitative loop systems of list |
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| CN109270284A (en) * | 2018-10-17 | 2019-01-25 | 安徽皖仪科技股份有限公司 | Quantitative sample injection and cleaning system |
| CN109596797A (en) * | 2019-02-15 | 2019-04-09 | 四川久环环境技术有限责任公司 | A kind of water quality on-line monitoring instrument video metering device |
| CN110208354A (en) * | 2019-04-02 | 2019-09-06 | 深圳市智创环保科技有限公司 | A kind of portable water quality in-line analyzer |
| CN110596306A (en) * | 2019-10-17 | 2019-12-20 | 苏州卫水环保科技有限公司 | Water quality detection pipeline system and water quality detection method |
| CN110862160A (en) * | 2019-11-29 | 2020-03-06 | 深圳一目科技有限公司 | Secondary water supply water quality monitoring waterway control system and control method thereof |
| CN110862160B (en) * | 2019-11-29 | 2024-05-03 | 深圳一目科技有限公司 | Water quality monitoring waterway control system for secondary water supply and control method thereof |
| CN112083119A (en) * | 2020-06-03 | 2020-12-15 | 杭州绿洁环境科技股份有限公司 | Permanganate index analyzer |
| CN113029955A (en) * | 2021-03-29 | 2021-06-25 | 江苏省环境监测中心 | Multichannel multithreading CODcr measurement system |
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Application publication date: 20150909 |
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