CN201344816Y - Reagent automatic metering device - Google Patents
Reagent automatic metering device Download PDFInfo
- Publication number
- CN201344816Y CN201344816Y CNU2008202408301U CN200820240830U CN201344816Y CN 201344816 Y CN201344816 Y CN 201344816Y CN U2008202408301 U CNU2008202408301 U CN U2008202408301U CN 200820240830 U CN200820240830 U CN 200820240830U CN 201344816 Y CN201344816 Y CN 201344816Y
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- CN
- China
- Prior art keywords
- metering
- gauge line
- liquid
- lotus root
- light lotus
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a reagent automatic metering device, which comprises a metering tube arranged on a metering rack. Corresponding to the metering tube, the metering rack is equipped with a metering photo coupler and a protective photo coupler respectively, wherein the protective photo coupler is used to protect instruments and the metering device when the device is abnormal and liquid dashes over most of the protective photo coupler and also has protection functions during a metering process. The utility model can realize reagent metering in a chemical oxygen demand automatic monitor under control of a metering pump, has fine stability for metering liquid with high concentration after actual tests, can be adaptable to metering liquid with relative high concentration and high viscous, can meter various reagents without correcting any parameter after being debugged, and has the advantages of fine metering stability, fast metering speed, simple structure and the like.
Description
Technical field
The utility model relates to a kind of device that fluid sample is slided and measures.
Background technology
The mode that is used for measuring on the instrument at present mainly contains following several: (1) relies on the automatic feed liquor metering method of gravity: this mode needs container with contain fluid as for a position that level is higher, rely on the liquid self gravitation to enter gauge line, then the amount that enters by light lotus root and valve body controlling liquid.Because liquid enters gauge line by gravity, therefore its speed that enters gauge line of liquid of different specific weight is also inequality, therefore can occur because flow rate of liquid measures inaccurate too soon or measures accident out of control, this situation allows to occur when automatic monitor is particularly on the automonitor at unattended duty anything but.(2) peristaltic pump metering method: the metering of this kind mode is power with the peristaltic pump, relies on the roller of peristaltic pump to push the lifting that pump line is finished liquid, by rotating speed and the size of peristaltic pump tube and the Time Calculation metered volume that peristaltic pump promotes liquid of peristaltic pump.Therefore, the peristaltic pump metering unavoidably can be subjected to the stability of peristaltic pump rotating speed, the influence of pump line toughness, in order to reach long-term high-precision metering effect, must select measured peristaltic pump of matter and pump line for use, with regard to the existing market situation, must adopt imported product, this is undoubtedly to the very big cost of product increase; And because the life problems of peristaltic pump tube, its maintenance and consumptive material also are very important significant problems; In addition because the limitation of the material of peristaltic pump tube adopts this metering method can not realize the metering of strong acid and strong base.
Summary of the invention
Technical problem to be solved in the utility model is: overcome the defective of above-mentioned prior art and provide a kind of and realize that the quantification stability degree is good, can adapt to higher concentration and the metering of high thick liquid and measure fireballing reagent self-measuring device.
The utility model purpose is achieved in that this reagent self-measuring device is characterized in that it comprises the gauge line that is installed on the metrology frame, is respectively equipped with metering light lotus root and protection light lotus root on the metrology frame of corresponding gauge line.
Described gauge line adopting quartz glass pipe.
Described metrology frame two ends are respectively equipped with gauge line loam cake and gauge line lower cover, and gauge line loam cake and gauge line lower cover and gauge line termination are equiped with pressure pad respectively, are equiped with O-ring seal or sealing gasket between gauge line loam cake and gauge line lower cover and gauge line.
Described metering light lotus root is installed in the bottom of gauge line, and protection light lotus root is installed in the top of gauge line.
The utility model principle of work and the course of work are: adopt the method metering liquid of judging liquid level position.Arrive the receiving end of light lotus root behind the quartz glass tube that the emission light of lotus root sees through, quartz ampoule vertically is fixed on the metrology frame to guarantee the liquid level abswolute level.Whether arrive desired location when liquid moves time lotus root detection liquid level from the lower end of gauge line to gauge line upper end light lotus root Metrology Division, judge the amount of liquid that is measured, think then that after detecting liquid level this metering finishes.
Can adopt the different metering methods of software control realization, make and accurately to finish the metering of variable concentrations liquid to variable concentrations reagent.In the software control, the method that adopts for the liquid of small concentration is: after metering light lotus root detects liquid level position for the first time, because the measuring apparatus sealing problem causes air to enter the situation that gauge line causes the mistake metering that bubble causes takes place, can cause the light lotus root to think that liquid level has arrived desired location and had influence on the metering result of reality by mistake for getting rid of in the metering process.In metering process, after for the first time liquid level position is detected by the light lotus root, push away liquid is counter, counter pushing away makes air enter extruding to make bubble breaking, and then carries out detecting the second time liquid level position in the process.In the actual test, the metering than small concentration liquid had the metering result of stabilizer pole.
For the metering of the relatively large reagent of strength of fluid as 98% concentrated sulphuric acid, in the metering process of so big concentration liquid, the situation that often occurs has: wall cling phenomenon and overshoot phenomenon, wherein overshoot phenomenon is because strength of fluid is bigger, consubstantiality hydrops physique amount is greater than small concentration liquid, and carrying out having had certain speed after long the flowing, thereby cause liquid to break through a kind of phenomenon of metering line, simultaneously also cause air to enter gauge line, in liquid, form the phenomenon of bubble with the sealing problem owing to measuring apparatus in the metering process.For because the sealing problem of measuring apparatus, and cause air to enter gauge line and in liquid, form the phenomenon of bubble, can adopt and measure the same disposal route of the less liquid of concentration; For the adoptable solution of wall built-up problem in the big concentration liquid process of metering is when the light lotus root detects liquid level for the first time, counter push away liquid make liquid in the gauge line turn back to metering light lotus root following after, carry out liquid level position detection second time again after waiting for the time that is provided with.The time of waiting for is to allow the wall built-up liquid film that forms flow back under action of gravity below the metering light lotus root.And be inertia for its main cause of overshooting problem, the mass ratio of big concentration liquid is bigger, compare flow for a long time after, it is difficult changing this mobile state again.The method that solves is, after liquid level position is detected, with liquid level counter be pushed into detect distance very short below the light lotus root detection position after, promote liquid more at a slow speed, detect liquid level position simultaneously.
Through the reality test, the utility model has good stability to the metering of big concentration liquid.
Set protection light lotus root is used for occurring unusual and liquid that cause is broken through protection light lotus root when a lot of at device on the utility model gauge line, and instrument and measuring apparatus are played a protective role.Protection light lotus root also can play the effect of metering in metering process.
The technical progress that the utility model is obtained: owing to adopt the utility model of this structure, under the control of volume pump, can realize the reagent metering in chemical oxygen demand (COD) (COD) automonitor, can adapt to the metering of higher concentration and high thick liquid, and debug under the situation that need not revise any parameter after finishing and can measure multiple different reagent, it is good to have the quantification stability degree, metering speed is fast, advantages of simple structure and simple.
Description of drawings
Fig. 1 is the utility model one-piece construction synoptic diagram.
Embodiment
Be that embodiment further specifies the utility model below with the accompanying drawing; as shown in Figure 1; this reagent self-measuring device comprises the gauge line 9 that is installed on the metrology frame 11; gauge line 9 adopting quartz glass pipes; be respectively equipped with metering light lotus root 10 and protection light lotus root 8 on the metrology frame 11 of corresponding gauge line 9; metering light lotus root 10 and protection light lotus root 8 are installed on the metrology frame 11 by grating seat 4 respectively, and metering light lotus root 10 is positioned at the bottom of gauge line 9, and protection light lotus root is adorned 8 tops that are positioned at gauge line 9.Metrology frame 11 two ends are respectively equipped with gauge line loam cake 7 and gauge line lower cover 1, gauge line loam cake 7 and gauge line 9 upper ends installing pressure pad 6, gauge line lower cover 1 and gauge line 9 bottoms installing pressure pad 3, installing O-ring seal 5 (or sealing gasket) between gauge line loam cake 6 and gauge line 9 upper ends, installing O-ring seal 2 (or sealing gasket) between gauge line lower cover 1 and gauge line 9 bottoms.
Claims (4)
1. a reagent self-measuring device is characterized in that it comprises the gauge line that is installed on the metrology frame, is respectively equipped with metering light lotus root and protection light lotus root on the metrology frame of corresponding gauge line.
2. reagent self-measuring device according to claim 1, it is characterized in that described metrology frame two ends are respectively equipped with gauge line loam cake and gauge line lower cover, gauge line loam cake and gauge line lower cover and gauge line termination are equiped with pressure pad respectively, are equiped with O-ring seal or sealing gasket between gauge line loam cake and gauge line lower cover and gauge line.
3. reagent self-measuring device according to claim 1 and 2 is characterized in that described gauge line adopting quartz glass pipe.
4. reagent self-measuring device according to claim 3 is characterized in that described metering light lotus root is installed in the bottom of gauge line, and protection light lotus root is installed in the top of gauge line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202408301U CN201344816Y (en) | 2008-12-29 | 2008-12-29 | Reagent automatic metering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202408301U CN201344816Y (en) | 2008-12-29 | 2008-12-29 | Reagent automatic metering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201344816Y true CN201344816Y (en) | 2009-11-11 |
Family
ID=41276396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202408301U Expired - Lifetime CN201344816Y (en) | 2008-12-29 | 2008-12-29 | Reagent automatic metering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201344816Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915683A (en) * | 2010-08-11 | 2010-12-15 | 湖南力合科技发展有限公司 | Metering device |
| CN103185619A (en) * | 2011-12-28 | 2013-07-03 | 深圳市蓝韵实业有限公司 | Measurement method and measurement device used for precisely quantifying liquid volume |
-
2008
- 2008-12-29 CN CNU2008202408301U patent/CN201344816Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915683A (en) * | 2010-08-11 | 2010-12-15 | 湖南力合科技发展有限公司 | Metering device |
| CN101915683B (en) * | 2010-08-11 | 2013-06-19 | 力合科技（湖南）股份有限公司 | Metering device |
| CN103185619A (en) * | 2011-12-28 | 2013-07-03 | 深圳市蓝韵实业有限公司 | Measurement method and measurement device used for precisely quantifying liquid volume |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091111 |
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| CX01 | Expiry of patent term |