CN102778383B - Automatic solution diluting equipment - Google Patents
Automatic solution diluting equipment Download PDFInfo
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- CN102778383B CN102778383B CN201210254331.9A CN201210254331A CN102778383B CN 102778383 B CN102778383 B CN 102778383B CN 201210254331 A CN201210254331 A CN 201210254331A CN 102778383 B CN102778383 B CN 102778383B
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Abstract
Disclosed is automatic solution diluting equipment. Effective diluting capacity of the automatic solution diluting equipment ranges from several millimeters to dozens of millimeters. The automatic solution diluting equipment comprises a control unit, a solution inlet tube, a diluent inlet tube, a double-tube squeezing electromagnetic valve, a tee joint, a metering pump, a diluting container and a diaphragm pump. The tee joint and the double-tube squeezing electromagnetic valve are used together so as to guarantee that only a water sample or diluent can flow through the automatic diluting equipment at a time, and the water sample can be proportionally diluted by regulating duration for injecting the water sample and duration for injecting the diluent. The integral equipment only comprises one metering pump, and accordingly, investment is saved, running expense is low, and the automatic solution diluting equipment is suitable to be used as pretreatment equipment for most chemical analysis and online monitoring devices. In addition, the equipment does not need to be calibrated regularly, and is simple and convenient to maintain.
Description
Technical field
The present invention relates to a kind of solution automatic dilution equipment, belong to the fluid sample pretreatment unit before analytical test.
Background technology
Because most of chemical analysis instrument is all provided with the measurement upper limit, therefore in order to adapt to the test request of high concentration water sample, sometimes need to carry out certainty ratio dilution pre-service to solution.
Existing solution automatic dilution equipment mainly divides two kinds: one to be high-precision microdilution instrument.Two high-precision syringe pumps are typically provided with to realize dilution function in instrument, be widely used in the fields such as molecular biology test, advantage is that precision is high, stability is strong, but usable range is narrower, effective dilute volume is usually between a few microlitre is to several milliliters, but owing to have employed high precision syringe pump, cost is higher.Two is industrial on-line dilution devices, mainly through flow and the ratio of governor valve control liquid.This equipment is mainly used in liquid volume added comparatively greatly, and the situation not high to accuracy requirement, useful volume scope rises between several cubic metres several.And sample needed for most of chemical analysis test is in the family of several milliliters to tens milliliters, above-mentioned two kinds of automatic dilution equipment all can not meet.Urgently need at present stability better, be convenient to control, the solution automatic dilution equipment of lower-cost, useful volume tens of milliliters.
Summary of the invention
The object of the invention is to propose a kind of solution automatic dilution equipment, make it automatically can not only complete distribution and the dilution of solution, and have that structure is simple, cost is lower and the feature such as good stability, can be used for the fluid sample automatic dilution before test chemical.
Technical scheme of the present invention is as follows:
A kind of solution automatic dilution equipment, containing control module, solution feed tube, dilution feed tube, volume pump and cut-back tank, it is characterized in that: this equipment also comprises threeway and two-tube extrusion pressing type solenoid valve, solution feed tube and dilution feed tube are connected with two imports of threeway after two-tube extrusion pressing type solenoid valve, and the outlet of threeway is connected with the import of volume pump; Described control module comprises power module and Programmable Logic Controller, and volume pump is connected with control module respectively by operation circuit with two-tube extrusion pressing type solenoid valve.
Technical characteristic of the present invention is also: described volume pump adopts flow range at 5 ~ 100ml/min, the precision volume pump more than 5%.The bottom of cut-back tank is provided with membrane pump, and membrane pump is connected with control module by operation circuit.Also overflow vent is provided with on the top of cut-back tank.
The present invention compared with prior art, has the following advantages and outstanding effect: 1. two-tube extrusion pressing type solenoid valve and supporting the use of threeway make equipment set reduce cost, use only a volume pump.2. dilution utilizes two-tube extrusion pressing type solenoid valve in proportion, and solution and the dilution feed liquor time separately in a flow process of controlling realizes, and therefore without the need to regularly calibrating volume pump, reduces the workload of operation maintenance.3. the usable range of this equipment is comparatively wide, from several milliliters to hundreds of milliliter, can meet the requirement of most chemical analysis instrument and on-line monitoring instrument.
Accompanying drawing explanation
Fig. 1 is the example structure schematic diagram of solution automatic dilution equipment.
Fig. 2 is control module schematic diagram.
Fig. 3 is software flow block diagram.
In figure: 1a-solution feed tube; 1b-dilution feed tube; The two-tube extrusion pressing type solenoid valve of 2-; 3-threeway; 4-volume pump; 5-cut-back tank; 6-overflow vent; 7-membrane pump; 8-control module, 8a-power module, 8b-Programmable Logic Controller; 9-waste liquid, 10-solution to be measured.
Embodiment
Fig. 1 is the structural representation of solution automatic dilution equipment, this equipment contains control module 8, solution feed tube 1a, dilution feed tube 1b, volume pump 4, cut-back tank 5, threeway 3 and two-tube extrusion pressing type solenoid valve 2, solution feed tube 1a and dilution feed tube 1b are connected with two imports of threeway 3 after two-tube extrusion pressing type solenoid valve 2, and the outlet of threeway is connected with the import of volume pump; Described control module 8 comprises power module 8a and Programmable Logic Controller 8b, and volume pump 4 is connected with control module 8 respectively by operation circuit with two-tube extrusion pressing type solenoid valve 2, wherein contains power module 8a, electromagnetic relay output module 8b in control module 8.Effective Dilution-heating method of this equipment is several milliliters to tens milliliters, and according to the useful capacity of dilution, volume pump should adopt flow range at 5 ~ 100ml/min, the precision volume pump more than 5%.
After solution feed tube 1a is connected by threeway 3 after two-tube extrusion pressing type solenoid valve 2 with dilution feed tube 1b, the integrated feed tube of two manifolds, liquid in feed tube is injected cut-back tank 5 by volume pump 4 exactly, cut-back tank 5 is containing overflow vent 6, membrane pump 7 is also connected with in the bottom of cut-back tank, waste liquid is discharged by membrane pump 7, and membrane pump 7 is connected with control module 8 by operation circuit.
Fig. 2 is control module schematic diagram, and power module 8a is connected with Programmable Logic Controller 8b, and the both positive and negative polarity of membrane pump 7, volume pump 4 and two-tube extrusion pressing type solenoid valve 2 is connected with the both positive and negative polarity of three passages (1,2,3) of Programmable Logic Controller 8b respectively.
Fig. 3 is software flow block diagram.Solution mixes according to a certain percentage with dilution.The course of work of solution automatic dilution equipment is as follows: volume pump 4 starts running, and solution enters cut-back tank 5; After a second, volume pump 4 shuts down, and two-tube extrusion pressing type solenoid valve is opened, and volume pump 4 is restarted, and after dilution enters 5, b seconds of cut-back tank, volume pump shuts down, and then closes two-tube extrusion pressing type solenoid valve 2.Repeat n above cyclic process.After the dilute solution coordinating experiment to use is finished using, membrane pump 7 starts running, and the redundant solution in emptying cut-back tank 5, last membrane pump 7 shuts down.Since then, the whole flow process of solution dilution completes.
Claims (3)
1. a solution automatic dilution equipment, containing control module (8), solution feed tube (1a), dilution feed tube (1b), volume pump (4) and cut-back tank (5), it is characterized in that: this equipment also comprises threeway (3), two-tube extrusion pressing type solenoid valve (2) and membrane pump (7); Solution feed tube (1a) is connected with two imports of threeway (3) after two-tube extrusion pressing type solenoid valve (2) with dilution feed tube (1b), and the outlet of threeway is connected with the import of volume pump; Described membrane pump (7) is arranged on the bottom of cut-back tank (5); Described control module (8) comprises power module (8a) and Programmable Logic Controller (8b), and volume pump (4), two-tube extrusion pressing type solenoid valve (2) are connected with control module (8) respectively by operation circuit with membrane pump (7); Dilution flow process is as follows:
Volume pump (4) starts running, and solution enters cut-back tank (5); After a second, volume pump (4) shuts down, two-tube extrusion pressing type solenoid valve is opened, volume pump (4) is restarted, dilution enters cut-back tank (5), and after b second, volume pump (4) shuts down, and then closes two-tube extrusion pressing type solenoid valve (2), repeat n above cyclic process, wherein, a is the time that volume pump (4) pumps into solution, and b is the time that volume pump (4) pumps into dilution;
After the dilute solution coordinating experiment to use is finished using, membrane pump (7) starts running, and the redundant solution in emptying cut-back tank (5), last membrane pump (7) shuts down, and completes the whole flow process of solution dilution.
2. a kind of solution automatic dilution equipment according to claim 1, is characterized in that: described volume pump (4) adopts flow range at 5 ~ 100ml/min, the precision volume pump more than 5%.
3. a kind of solution automatic dilution equipment according to claim 1, is characterized in that: the top of cut-back tank (5) is provided with overflow vent (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210254331.9A CN102778383B (en) | 2012-07-20 | 2012-07-20 | Automatic solution diluting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210254331.9A CN102778383B (en) | 2012-07-20 | 2012-07-20 | Automatic solution diluting equipment |
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| CN102778383A CN102778383A (en) | 2012-11-14 |
| CN102778383B true CN102778383B (en) | 2015-06-17 |
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| CN201210254331.9A Active CN102778383B (en) | 2012-07-20 | 2012-07-20 | Automatic solution diluting equipment |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062167A (en) * | 2014-06-23 | 2014-09-24 | 青岛普仁仪器有限公司 | Automatic online sample dilution and mixing device and mixing method |
| CN105158051A (en) * | 2015-10-14 | 2015-12-16 | 郑州富铭环保科技有限公司 | Dilution device for determination of high-concentration water sample through water-quality on-line analyzer |
| CN106198477A (en) * | 2016-07-29 | 2016-12-07 | 北京宝德仪器有限公司 | Hydride generation system and method for generation for atomic fluorescence spectrometer |
| CN109855946A (en) * | 2019-02-19 | 2019-06-07 | 苏州科技大学 | A kind of high-concentration waste water on-line detector water inlet dilution device |
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|---|---|---|---|---|
| EP2175340A2 (en) * | 2008-08-26 | 2010-04-14 | Sysmex Corporation | Reagent preparing apparatus, sample processing apparatus and reagent preparing method |
| CN101816907A (en) * | 2009-02-26 | 2010-09-01 | 希森美康株式会社 | Reagent preparing device, specimen processing system and reagent preparing method |
| CN201832599U (en) * | 2010-09-15 | 2011-05-18 | 威海怡和专用设备制造股份有限公司 | Automatic dispensing device of liquid materials |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2825085Y (en) * | 2005-06-15 | 2006-10-11 | 广州海岩环保科技有限公司 | High-accuracy gas mixing device |
| CN102513020B (en) * | 2011-12-02 | 2014-04-02 | 上海科勒电子科技有限公司 | Gas and liquid mixed liquid supply and conveying device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2175340A2 (en) * | 2008-08-26 | 2010-04-14 | Sysmex Corporation | Reagent preparing apparatus, sample processing apparatus and reagent preparing method |
| CN101816907A (en) * | 2009-02-26 | 2010-09-01 | 希森美康株式会社 | Reagent preparing device, specimen processing system and reagent preparing method |
| EP2224224A2 (en) * | 2009-02-26 | 2010-09-01 | Sysmex Corporation | Reagent preparing device, specimen processing system and reagent preparing method |
| CN201832599U (en) * | 2010-09-15 | 2011-05-18 | 威海怡和专用设备制造股份有限公司 | Automatic dispensing device of liquid materials |
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